Wednesday, August 26, 2020
Biography of Rudolf Diesel, Inventor of the Diesel Engine
Life story of Rudolf Diesel, Inventor of the Diesel Engine The motor that bears his name set off another section in the Industrial Revolution, however German specialist Rudolf Diesel (1858ââ¬1913), who experienced childhood in France, at first idea his development would support independent ventures and craftsmans, not industrialists.à In truth, diesel motors are typical in vehicles of different kinds, particularly those that need to pull overwhelming burdens (trucks or prepares) or do a ton of work, for example, on a homestead or in a force plant. For this one improvement to a motor, his effect on the world is clear today. In any case, his demise over a century back stays a secret. Quick Facts: Rudolf Diesel Occupation: EngineerKnown For:à Inventor of the Diesel engineBorn:à March 18, 1858, in Paris, FranceParents:à Theodor Diesel and Elise StrobelDied:à September 29 or 30, 1913, in the English ChannelEducation:à Technische Hochschule (Technical High School), Munich, Germany; Industrial School of Augsburg, Royal Bavarian Polytechnic of Munich (Polytechnic Institute)Published Works:à Theorie und Konstruktion eines rationellen Wremotorsà (Theory and Construction of a Rational Heat Motor), 1893Spouse:à Martha Flasche (m. 1883)Children:à Rudolf Jr. (b. 1883), Heddy (b. 1885), and Eugen (b. 1889)Notable Quote:à I am solidly persuaded that the car motor will come, and afterward I consider my lifeââ¬â¢s work total. Early Life Rudolf Diesel was conceived in Paris, France, in 1858. His folks were Bavarian settlers. At the episode of the Franco-German War, the family was ousted to England in 1870. From that point, Diesel went to Germany to learn at the Munich Polytechnic Institute, where he exceeded expectations in building. After graduation he was utilized as a cooler architect in Paris, at Linde Ice Machine Company, starting in 1880.à He had contemplated thermodynamics under Carl von Linde, leader of the organization, in Munich. His genuine affection lay in motor structure, be that as it may, and throughout the following barely any years he started investigating various thoughts. One concerned figuring out how to enable private companies to contend with enormous ventures, which had the cash to bridle the intensity of steam motors. Another was the way to utilize the laws of thermodynamics to make a progressively productive motor. In his psyche, fabricating a superior motor would support the little person, the free craftsmans, and business visionaries. In 1890 he took work heading the building branch of a similar refrigeration firm in its Berlin area, and during his off an ideal opportunity (to keep his licenses) would try different things with his motor structures. He was helped in the improvement of his structures by Maschinenfabrik Augsburg, which is presently MAN Diesel, and Friedrich Krupp AG, which is currently ThyssenKrupp. The Diesel Engine <img information srcset=https://www.thoughtco.com/thmb/0fvsAYXZdQ4DpRWcvzCKtpjvtUY=/300x0/filters:no_upscale():max_bytes(150000):strip_icc()/GettyImages-463921245-5c64d451c9e77c0001566f39.jpg 300w, https://www.thoughtco.com/thmb/kuF4q-9oBjx54OjB83qXBNvYWVs=/1110x0/filters:no_upscale():max_bytes(150000):strip_icc()/GettyImages-463921245-5c64d451c9e77c0001566f39.jpg 1110w, https://www.thoughtco.com/thmb/yS_k3xpMyxkO6Gi0ZA0qWtshM=/1920x0/filters:no_upscale():max_bytes(150000):strip_icc()/GettyImages-463921245-5c64d451c9e77c0001566f39.jpg 1920w, https://www.thoughtco.com/thmb/fSWUijn0O7J4W_Gs0E-yBOm5Kpw=/3543x0/filters:no_upscale():max_bytes(150000):strip_icc()/GettyImages-463921245-5c64d451c9e77c0001566f39.jpg 3543w information src=https://www.thoughtco.com/thmb/dtdQaZmQ5QopvkRUNDL7wQ-MHtk=/4930x3543/filters:no_upscale():max_bytes(150000):strip_icc()/GettyImages-463921245-5c64d451c9e77c0001566f39.jpg src=//:0 alt=Diesel motor: inside burning motor, shading drawing class=lazyload information click-tracked=true information img-lightbox=true information expand=300 id=mntl-sc-square image_1-0-13 information following container=true /> Print Collector/Getty Images Rudolf Diesel structured many warmth motors, including a sun based fueled air motor. In 1892 he applied for a patent and got an improvement patent for his diesel motor. In 1893 he distributed a paper portraying a motor with ignition inside a chamber, the inward burning motor. In Augsburg, Germany, on August 10, 1893, Rudolf Diesels prime model, a solitary 10-foot iron chamber with a flywheel at its base, ran on its own capacity just because. He got a patent there for the motor that equivalent year and a patent for an improvement. Diesel burned through two additional years making upgrades and in 1896 showed another model with the hypothetical productivity of 75 percent, rather than the 10 percent effectiveness of the steam motor or other early inward ignition motors. Work proceeded on building up a creation model. In 1898 Rudolf Diesel was allowed U.S. patent #608,845 for an inner burning engine.â His Legacy Rudolf Diesels developments share three focuses for all intents and purpose: They identify with heat transference by regular physical procedures or laws, they include uniquely imaginative mechanical structure, and they were at first persuaded by the creators idea of sociological needs-by figuring out how to empower free skilled workers and craftsmans to rival enormous industry. That last objective didnââ¬â¢t precisely work out as Diesel anticipated. His creation could be utilized by independent ventures, however the industrialists held onto it anxiously too. His motor took off quickly, with applications far and wide that prodded the Industrial Revolutions fast turn of events. Following his demise, diesel motors got normal in cars, trucks (beginning during the 1920s), ships (after World War II), trains (beginning during the 1930s), and then some they despite everything are. The diesel motors of today are refined and improved renditions of Rudolf Diesels unique idea. His motors have been utilized to control pipelines, electric and water plants, vehicles and trucks, and marine specialty, and not long after were utilized in mines, oil fields, processing plants, and transoceanic transportation. Increasingly productive, all the more remarkable motors permitted vessels to be greater and more merchandise to be sold abroad. Diesel turned into a mogul before the finish of the nineteenth century, yet awful ventures left him in a great deal of obligation toward a mind-blowing finish. His Death In 1913, Rudolf Diesel vanished on the way to London while on a sea liner returning from Belgium to go to the momentous of another diesel-motor plant-and to meet with the British naval force about introducing his motor on their submarines, the History Channel says.à He is accepted to have suffocated in the English Channel. Its suspected by some that he ended it all over overwhelming obligations, because of awful speculations and unexpected frailty, data that didnt come out until after his demise. In any case, hypotheses promptly started that he was helped over the edge. A paper at the time conjectured, Inventor Thrown Into the Sea to Stop Sale of Patents to British Government, the BBC noted. World War I was within reach, and Diesels motors made it into Allied submarines and ships-however the last were fundamentally for World War II. Diesel was a defender of vegetable oil as fuel, putting him at chances with the ever-developing oil industry and driving, the BBC says, to the hypothesis that Diesel was Murdered by Agents From Big Oil Trusts. Or on the other hand it could have been coal magnates, yet others estimated, in light of the fact that steam motors ran on tons and huge amounts of it. Speculations saved his name in the papers for quite a long time and even incorporated a death endeavor by German covert operatives to forestall his sharing insights regarding the advancement of the U-pontoon. Sources Daimler. Rudolf Diesel and His Invention. Daimler.com.Harford, Tim. How Rudolf Diesels Engine Changed the World. BBC News, 19 December 2016.History.com Editors. Creator Rudolf Diesel Vanishes. History.com.Lemelson-MIT. Rudolf Diesel. Lemelson-MIT Program, Massachusetts Institute of Technology.Lewis, Danny. At the point when the Inventor of the Diesel Engine Disappeared. Smithsonian Magazine. 29 September 2016.
Saturday, August 22, 2020
Politics of development Essay Example | Topics and Well Written Essays - 2000 words
Legislative issues of advancement - Essay Example The motivation behind this paper is to investigate the impacts of populace development on advancement, and to show that overpopulation is firmly connected to sexual orientation legislative issues. Thomas Malthus, a British demographer and political financial expert, built up a hypothesis of overpopulation notice humankind of the perils of growing numbers. In his work, An Essay on the Principle of Population (1999), Malthus contended about the negative impacts of populace development. He guaranteed that the increase of mankind after some time would prompt sickness and starvation by making regular assets scarcer, and arrangements and cures all the more expensive. Malthus contended that due to the general development of various classes inside society (basically English society) and an expansion in neediness, the ethical request of society would be tried. Malthus utilized two covering sayings to clarify his thoughts. He contended that it was simpler for populaces to develop than for regular assets to help this development; populace, for Malthus, expanded in a geometric movement, while assets expanded in a number juggling movement. In any case, he kept up, there is a solid propensity in the public eye towards populace development. This propensity disturbs the harmony between the quantity of individuals and the measure of food accessible to take care of them. This circumstance exacerbates neediness and expanded the concerns of poor people. Subsequently improvement is blocked. The Malthusian model clarifies, just by basic gracefully and request rationale, that when populace expands, the work advertise turns out to be increasingly serious. This drives compensation down. As the extent of food per individual reductions, the cost of food likewise increments. Along these lines, overpopulation harms both destitution mitigation and generally speaking advancement of society. There were two answers for this issue as per Malthus: positive checks and preventive checks. Positive checks were normal and verifiable speed breakers to populace development and came as war, worldwide pandemics, and starvations. These checks had
Friday, August 21, 2020
Procoagulant Circulating Microparticles In Health And Disease Essay
Procoagulant Circulating Microparticles In Health And Disease Essay Procoagulant Circulating Microparticles In Health And Disease â" Essay Example > Procoagulant Circulating MicroparticlesNormal cells and cancer cells release microparticles and exosomes into their environment. Microparticles are budded off from the cell surface and are best known for their ability to support coagulation. Exosomes, which are stored in intracellular multivesicular bodies and are released when the membrane of the multivesicular body fuses with the cells plasma membrane, efficiently modulate the immune response. (Kakkar, DeRuvo, Chinswangwatanakul, Tebbutt, Williamson, 2005 p. 1004-5) Dvorak and coworkers demonstrated that tumor-derived procoagulant activity (PCA) is associated with sedimentable, ultramiscroscopic plasma membrane-derived vesicles in vitro (cancer cell-conditioned culture medium) as well as in vivo (ascitis tumor fluid from animals). These vesicles, isolated by centrifugation at 100 000 · g, ranged in size from 15 and 800 nm (median 60 nm) (Dvorak, Quay, Orenstein, Bitzer, Carvalho, 2007 p. 923-4) These investigators showed that c ancer cell-derived vesicles support coagulation via various mechanisms, i.e. one procoagulant activity associated with shed tumor vesicles behaved as tissue factor, and shed tumorvesicles also acted at a second step late in the clotting cascade at the level of prothrombinase generation, presumably by providing a phospholipid surface(Dvorak, Quay, Orenstein, Bitzer, Carvalho, 2007 p. 923-4). A decade later, in 1993, from four cases of Trousseaus syndrome, i.e. cancer patients who have spontaneous recurrent or migratory episodes of venous thrombosis, arterial emboli due to nonbacterial thrombotic endocarditis, or both, it was concluded that two properties of a tumor can account for the pathogenesis of Trousseaus syndrome: The first is that the malignant cell expresses tissue factor on its external surface. The second is that the tumor cells are anatomically positioned so that cells or vesicles shed from them are exposed to the circulating blood, either directly or by their entrance i nto the circulatory system from the lymphatic system. (Rapaport, 2005 p. 153-61)Concurrently, other investigators concluded that a continuing entrance into the circulation of tissue factor from malignant cells is responsible for the manifestations of Trousseaus syndrome in most patients. (Rapaport, 2005 p. 153-61) Taken together, these studies demonstrate that the strong association between malignant disease and coagulation activation mayâ" at least partially â" be explained by the release of tissue factor (TF) exposing vesicles from cancer cells into the blood or other body fluids, which in turn may contribute to the low grade disseminated intravascular coagulation and thrombotic episodes which are characteristic of Trousseaus syndrome. Other potential sources of TF-exposing vesiclesThe true cellular origin of microparticle-associated TF in cancer patients, however, has proven surprisingly difficult to establish. Patients with disseminated breast and pancreatic cancer have incr eased levels of microparticle-associated TF in plasma compared with controls, and the patients with a low likelihood of survival have (in plasma) both a high microparticle-associated TF activity and increased numbers of epithelial mucin (MUC1) exposing microparticles. (Rapaport, 2005 p. 153-61)Whether or not MUC1-exposing microparticles, for example microparticles originating from tumor cells, expose TF, however, was not investigated. Surprisingly, a low number of microparticles was present that stained positive for both MUC1 and glycoprotein IIIa (CD61; integrin b3). As glycoprotein IIIa is abundantly exposed on platelets and platelet-derived microparticles, they concluded that a small part of circulating microparticles seemed to result from fusion of cellular vesicles originating from malignant epithelial cells and platelets. Whether or not these particular microparticles expose TF, however, was not investigated.
Procoagulant Circulating Microparticles In Health And Disease Essay
Procoagulant Circulating Microparticles In Health And Disease Essay Procoagulant Circulating Microparticles In Health And Disease â" Essay Example > Procoagulant Circulating MicroparticlesNormal cells and cancer cells release microparticles and exosomes into their environment. Microparticles are budded off from the cell surface and are best known for their ability to support coagulation. Exosomes, which are stored in intracellular multivesicular bodies and are released when the membrane of the multivesicular body fuses with the cells plasma membrane, efficiently modulate the immune response. (Kakkar, DeRuvo, Chinswangwatanakul, Tebbutt, Williamson, 2005 p. 1004-5) Dvorak and coworkers demonstrated that tumor-derived procoagulant activity (PCA) is associated with sedimentable, ultramiscroscopic plasma membrane-derived vesicles in vitro (cancer cell-conditioned culture medium) as well as in vivo (ascitis tumor fluid from animals). These vesicles, isolated by centrifugation at 100 000 · g, ranged in size from 15 and 800 nm (median 60 nm) (Dvorak, Quay, Orenstein, Bitzer, Carvalho, 2007 p. 923-4) These investigators showed that c ancer cell-derived vesicles support coagulation via various mechanisms, i.e. one procoagulant activity associated with shed tumor vesicles behaved as tissue factor, and shed tumorvesicles also acted at a second step late in the clotting cascade at the level of prothrombinase generation, presumably by providing a phospholipid surface(Dvorak, Quay, Orenstein, Bitzer, Carvalho, 2007 p. 923-4). A decade later, in 1993, from four cases of Trousseaus syndrome, i.e. cancer patients who have spontaneous recurrent or migratory episodes of venous thrombosis, arterial emboli due to nonbacterial thrombotic endocarditis, or both, it was concluded that two properties of a tumor can account for the pathogenesis of Trousseaus syndrome: The first is that the malignant cell expresses tissue factor on its external surface. The second is that the tumor cells are anatomically positioned so that cells or vesicles shed from them are exposed to the circulating blood, either directly or by their entrance i nto the circulatory system from the lymphatic system. (Rapaport, 2005 p. 153-61)Concurrently, other investigators concluded that a continuing entrance into the circulation of tissue factor from malignant cells is responsible for the manifestations of Trousseaus syndrome in most patients. (Rapaport, 2005 p. 153-61) Taken together, these studies demonstrate that the strong association between malignant disease and coagulation activation mayâ" at least partially â" be explained by the release of tissue factor (TF) exposing vesicles from cancer cells into the blood or other body fluids, which in turn may contribute to the low grade disseminated intravascular coagulation and thrombotic episodes which are characteristic of Trousseaus syndrome. Other potential sources of TF-exposing vesiclesThe true cellular origin of microparticle-associated TF in cancer patients, however, has proven surprisingly difficult to establish. Patients with disseminated breast and pancreatic cancer have incr eased levels of microparticle-associated TF in plasma compared with controls, and the patients with a low likelihood of survival have (in plasma) both a high microparticle-associated TF activity and increased numbers of epithelial mucin (MUC1) exposing microparticles. (Rapaport, 2005 p. 153-61)Whether or not MUC1-exposing microparticles, for example microparticles originating from tumor cells, expose TF, however, was not investigated. Surprisingly, a low number of microparticles was present that stained positive for both MUC1 and glycoprotein IIIa (CD61; integrin b3). As glycoprotein IIIa is abundantly exposed on platelets and platelet-derived microparticles, they concluded that a small part of circulating microparticles seemed to result from fusion of cellular vesicles originating from malignant epithelial cells and platelets. Whether or not these particular microparticles expose TF, however, was not investigated.
Sunday, May 24, 2020
The Utalitarian Approach to Moral Obligation - 609 Words
Wand(1979) expounds on Hume ethical theory in relation to moral obligation is a theory of good and evil rather than one of duty and obligation- , according to Wand (1956:55):â⬠this statement is quite erroneousââ¬â¢ for Hume does not merely wish to discover the foundation of our moral actionsâ⬠. Hume account of how motives prompt men to moral actions is quite complex, but Wand (1979) also asserts that Hume distinguishes between two basic type of action to make it more understandable. The first type are those action which men will perform without the aid or influence of reason or custom; the second are those action which it can be expected men will normally perform with the aid or influence of reason or custom. Hume distinguishes these two types of action-in terms of the specifically moral nature of their motive, whether or not the action is done from a sense of duty; thus for Hume, there are four classes of action: The first, are those actions prompted by the natural or -moral motives; The second are those actions prompted by artificial, non-moral motive; third; those actions promoted by artificial moral motives. In consideration of his account of moral motivation; Humeââ¬â¢s ultimate intention is to show that it cannot be a natural duty to carry out certain types of obligation such as being just or keeping promises. Hume thinks that the actions envisaged cannot constitute duty; it would never be a duty unless human nature possesses some rational inclination prompting individuals toShow MoreRelatedSocial Work Ethics3451 Words à |à 14 Pagesthe question set I have decided to use italics when specific points are made in relation to the opening quote). Ã¢â¬Æ' Values are difficult to define. Shardlow captures the range of ground covered by the term; ââ¬Å"almost any kind of belief and obligation, anything preferred for any reason or for no apparent reason at all can be viewed as a valueâ⬠(1989, p.4). An individualââ¬â¢s values are adopted cultural or societal values and are therefore socially acceptable (Banks, 1995). This idea of what people
Thursday, May 14, 2020
Urban Sprawl And The United States - 3113 Words
Introduction This paper is a review of past and current research based on the cause and effect of urban sprawl in the United States with a case analysis of Fairfax County, Virginia. The motivation for this review is to shed light on issues that surround urban sprawl in large metropolitan areas and to discuss recommendations for research and ways to improve various effects of sprawl. The second motivation for this research is to show that there needs to be uniformity among researchers and urban planners, better data and analysis should be done to combat sprawl. My goal with this literature review is to define urban sprawl, define classic patterns in the United States, how we measure sprawl, the cause and effect of sprawl in the United States, give detailed background information on Fairfax County, future trends and implications of sprawl in Fairfax County, how to combat sprawl in the United States as well as in Fairfax County and key priorities in future research. What is Urban Sprawl? To define sprawl we have to understand the characteristics that make up sprawl. Low density is most commonly defined as that of single family homes on larger lots in areas constituted as suburban, buildings are smaller (having less stories) and are spaced further apart. The Transportation Research Board (1998) states that low density development ââ¬Å"is one of the cardinal defining characteristics of sprawl.â⬠Single use zoning is also a common characteristic of sprawl. Single use zoning isShow MoreRelatedUrban Sprawl Of The United States1716 Words à |à 7 Pages Urban Sprawl in The United States Kori Thompson The Gwinnett School of Math, Science, and Technology Urban Sprawl in The United States A great number of Americans living today reside in areas where homes, businesses, and institutions are spread sparsely. These areas are commonly referred to as either urban or suburban sprawl. Sprawl is generally designed for the movement of cars and not the movement of pedestrians; most people simply will not, and often cannotRead MoreEssay High Cost of Urban Sprawl1661 Words à |à 7 PagesUrban Sprawl is an intricate concept that is mostly known as low density, automobile dependent development beyond the edge of employment and services zones. This type of development is ubiquitous in the United States since the end of World War II. Urban sprawl or suburban sprawl has raised immense number of concerns in various areas, such as: environmental impacts, loss of farmland, traffic problems, urban decline, taxpayer subsidy, loss of community, housing, as well as some unspecific concernsRead MoreUrban Sprawl and Wildlife Essay1279 Words à |à 6 Pagescivilization. In the United States, our progress is often measured by growth and development, but should this be re-examined? There are many opinions on the subject of urban sprawl and its effects on wildlife, but one thing is for certain, we are expanding. From 1955 to 2005, urban and suburban areas grew by 300%, however, the population only increased by 75% over the same period (Ewing, Kostyack and Chen). According to NatureServe, a non-profit conservation organization, urban sprawl threatens one ofRead MoreHousing Affordability And The Housing Crisis1508 Words à |à 7 Pagesapplicants for housing assistance. It is used in the administration of rental housing subsidies, such as the Section 8 housing vouchers (Bogdon Can, 1997). In addition to qualifying ratios, it is often used to describe housing markets not only in the United States but also internationally (Robinson et al. 2006). Both indices and standards are structurally deficient in that they only consider costs directly related to housing, ignoring those related to transportation which also vary with location. We knowRead MorePopulation Growth And Urban Road Emissions1738 Words à |à 7 PagesPOPULATION GROWTH AND URBAN ROAD EMISSIONS Toh Xinyi Cindi1 1Undergraduate Student, Faculty of Agricultural and Environmental Sciences, McGill University, 817 Sherbrooke St. W., xinyi.toh@mail.mcgill.ca Abstract This paper describes how world population growth is the most challenging factor in affecting urban road emissions. As world population grows, urban population has increased leading to greater demands for private motor vehicles due to issues like urban sprawl and the aspirations for owningRead MoreThe Issue Of Natural Resources Management837 Words à |à 4 PagesThe next big issue in natural resources management will be concerns regarding urban sprawl and the conflict it is causing between humans and wildlife. Urban sprawl involves a city expanding beyond its originally set perimeters. This can occur as ââ¬Å"edge citiesâ⬠or smaller communities form around the outskirts of a metropolitan area. Ranges that were formerly pastoral begin having people inhabiting (Nechyba Walsh, 2004). The wildlife that was previously occupying these spaces is disturbed. This eitherRead MoreHow Transpiration Is Important For The Improvement Of Evolution1537 Words à |à 7 Pagesexpectations of th e first ever car inventor could have dreamed of . In 1768, the first auto-mobile ran by steam power was created by Nicolas- Joseph Cugnot. The first car to run by combustion hydrogen engine was created by Franà §ois Isaac de Rivaz. Research states that Karl Benz created the first ever automobile in 1886. He created the first gasoline automobile. The name of the car was called the ââ¬Å"Benz Patent-Motor wagonâ⬠, and this was also considered the first manufactured line of vehicles. The first longRead MoreHome From Nowhere By James Kunstler1361 Words à |à 6 PagesJames Kunstler in his book Home from Nowhere, slams American urban design and goes into detail about its horrifying attributes. He calls the United States a theme park nation that needs superficial stimulation to hide unhappiness. These conditions exist, in part, due to our association of the city with the dirty industrial revolution rather than the more natural green environment that people prefer. He calls the public realm the connective tissue of our everyday wor ld. It is parks, streets, squaresRead MoreHow Transpiration Is Important For The Improvement Of Evolution1526 Words à |à 7 Pagesexpectations of the first ever car inventor could have dreamed of. In 1768, the first auto-mobile ran by steam power was created by Nicolas- Joseph Cugnot. The first car to run by combustion hydrogen engine was created by Franà §ois Isaac de Rivaz. Research states that Karl Benz created the first ever automobile in 1886. He created the first gasoline automobile. The name of the car was called the ââ¬Å"Benz Patent-Motor wagonâ⬠, and this was also considered the first manufactured line of vehicles. The first longRead MoreNew Urbanism1339 Words à |à 6 Pages{text:change} {text:change} {text:change} {text:change} New Urbanism New Urbanism is a relatively recent architectural and social design principle to leave its mark {text:change} {text:change} on United States society. Many past contributing factors present in society {text:change} {text:change} have lead some Americans {text:change} {text:change} to call {text:change} {text:change} for the implementation of a New Urbanism way of life in recent years. After defining and {text:change}
Wednesday, May 6, 2020
My Family Eulogy - 1715 Words
Several days after Papa received my card and photos, he notified Oma Tine and his sister Puck that he reconnected with Ellen and I, after receiving an initial phone call from me, out of a clear blue sky. Upon hearing the astonishing joyful news, Oma Tine was thrilled for her son and grandchildren, although knowing that it had been my heartââ¬â¢s life-long wish, she was even more so for me. Aunt Puck was equally pleased that the deep family secret of our existence was finally revealed, it was as if a tremendous burden had been lifted from the familyââ¬â¢s shoulders. When time allowed, Papa enjoyed phoning me at work, and when time allowed, we shared intimate conversations about the years missed. He was deeply interested in my career,â⬠¦show more contentâ⬠¦Hours before our flight to Houston, Vince drove us to the airport where he wished me luck as he said meaningfully, ââ¬Å"Hon, I hope you will find what you have searched your whole life for.â⬠Always knowing the right thing to say, my husband was amazing. In flight, Ellen explained to her too-young-to-understand toddlers that we were going to Houston to meet their grandfather. When we arrived at the Houston International Airport, we took a shuttle to the hotel where we were scheduled to meet Papa in less than two hours. Overly nervous, I imagined the moment when a knock on the door would indicate that he was standing on the other side and we would see each other for the first time in over thirty years! After we settled in our room, we telephoned Mom and our husbands to notify them of our safe arrival and enthusiasm for meeting Papa. Since Mom always dressed us alike when we were children, Ellen and I wore similar outfits for the occasion. August 19, 1994, at 2 o clock we heard the highly anticipated knock on the hotel room door. Since 1961, I must have wished for this moment a million times, and now that it was actually here, I was afraid and fragile as a bird ââ¬Å"Oh my God, El len, there he isâ⬠¦. You open the door,â⬠I commanded. ââ¬Å"Come on,â⬠she replied encouragingly, as she grabbed for my hand, ââ¬Å"we willShow MoreRelatedMy Eulogy In My Family1022 Words à |à 5 Pagesand I always will. I woke up early and I was upstairs about half of an hour before my bus was going to be at my stop at 7:20 a.m. Usually, I would wake up at about 6:30, sometimes 7:00. October first, I was up and getting ready at 6:00 a.m. I got ready and I just had that feeling that something was wrong, but I didnââ¬â¢t know what was wrong. Iââ¬â¢m getting ahead of myself. Letââ¬â¢s go back a few years to my childhood. In my life I have many loving relatives. One relative in particular, I had a very specialRead MoreHow to Write a Eulogy Essay941 Words à |à 4 Pages According to the Merriam-Websters dictionary, eulogy or elegy is the spoken or written tribute that praises someone or something very highly, a tribute to somebody who has recently died or alive. The word is derived from the two Greek words for you and word (Anton). The elegy dates back to classic Greek poetry containing two lines known as a couplet and combines many of these couplets to create the funeral poem (Anton). The most noted scholar and poet Callimachus, expressed powerfulRead MoreHow Do You Write A Eulogy1179 Words à |à 5 PagesHow do you write a eulogy when you donââ¬â¢t even know the definition of one? I was ten years old at the time and life had just gotten a lot harder for me. How can someone expect me to write a eulogy to read at my grandmotherââ¬â¢s funeral when prior to that my biggest life decision was what to wear to school everyday. I am now seventeen years old and still to this day that was the hardest thing and one of the most stressful things I have ever had to do. At this point in my life I am having to sit down andRead MorePrincess Diana Rhetorical Analysis or Reports Essay927 Words à |à 4 PagesPrince. The accident was known around the world and many newspapers and news programs wrote articles about the late Princessââ¬â¢s death. The Queen of England and Princess Dianaââ¬â¢s brother Lord Spencer spoke about the Princess in a televised speech and her eulogy at the funeral service. The first article reporting of the Princessââ¬â¢s death was from the British Broadcasting Company (BBC) on August 31, 1997, the morning of the crash. This article tells the basic information known at the time of Princess Dianaââ¬â¢sRead MoreHow Does College Prepare Us For Living A Life Of Virtue?907 Words à |à 4 PagesDavid Brooks wrote how there are two sets of virtues, the rà ©sumà © virtues and the eulogy virtues. He goes on to explain that the rà ©sumà © virtues are the skills one would bring to a workplace, while the eulogy virtues are things someone would say at oneââ¬â¢s funeral, explaining whether he or she was kind, honest, brave, etc. Over the course of my four years in college, I hope to develop a long list of rà ©sumà © virtues and eulogy virtues that will help me grow in this life. Some of the rà ©sumà © virtues I hopeRead MoreEssay on The Funeral Oration of Pericles923 Words à |à 4 Pagesis a eulogy that focuses on the greatness of Athens and her ancestors. The eulogy is given by a member of the family, in most cases the son. This speech was required by the law to have some necessary components. The speech had to talk about the lives of both the deceased and the ancestors of the deceased. At the end of the eulogy Pericles has told about the soldiers and the ancestors of Athens but it seems that he is not sure if he has been able to get through to the citizens of Athens. ââ¬Å"My taskRead More The Importance of the Warrior Class Exposed in Funeral Oration of Pericles1038 Words à |à 5 Pagesnational pride and their passion to defend their country. The oration was a eulogy that focuses on the prominence of Athens and her ancestors. A member of the family gave the eulogy, generally it was a son if possible. It was required by the law for the dissertation to have some necessary components. The speech had to be in regard to the lives of both the deceased and the ancestors of the deceased. At the end of the eulogy that Pericles gave he spoke in reference to the soldiers and the ancestorsRead MoreComparing the Speeches of Mark Antony and Robert F. Kennedy Essay1244 Words à |à 5 Pagesgratifying skill. Great speeches can be inspiring, compelling, and even revolutionary ââ¬â indeed, these speeches are deliberate, succinct, engaging, and unforgettable. Two examples of such great speeches in both literature and in history are Mark Antonyââ¬â¢s eulogy in Shakespeareââ¬â¢s Julius Caesar and Robert F. Kennedyââ¬â¢s On the Death of Martin Luther King. Through the speakersââ¬â¢ use of parallel structure, caesuras, and pers onal references ââ¬â three stylistic devices and techniques ââ¬â not only were both speakers ableRead MoreSocial Worker, A Social And Moral Compass For Social Work Essay1801 Words à |à 8 Pagesworker would deliver a eulogy at their daughterââ¬â¢s funeralâ⬠(Reamer, 2002). Immediately, the social worker recognized the ethical dilemma. When considering the correct decision to make pertaining to the above dilemma, one must consider if speaking at a clientââ¬â¢s funeral is ethical. When considering responsibility to the client and the choices faced by the social worker, the most important standard to consider is privacy and confidentiality. Can a social worker give a eulogy without breaking confidentialityRead MoreThe Fault Of Our Stars By John Green1023 Words à |à 5 PagesStars is a book written by John Green. This book has many themes like love for the ways that Hazel and Augustus treat one another. There is courage for the way that these teenagers battle cancer and are brave while doing it. Also, another theme is family for the way that Hazel and Augustusââ¬â¢s parents love them, support them, and comfort them with every decision that they make. The main characters in this book are Hazel Grace Lancaster, the narrator of the book who has cancer and knows that she is not
Tuesday, May 5, 2020
Ann Putnam free essay sample
This portrait, however, is somewhat flawed as it appears that, in Anns case at least, the parents of the afflicted must have had a strong influence with the child, as did the other adult accusers. Initially, Ann was fed names by her parents and minister. Her father was an influential church leader and became an aggressive accuser of witches. Her mother was a fearful woman, still mourning the death of her infant daughter, and, later, she claimed that she herself was attacked by witches. Though many of the people Ann accused were those that her family or the Rev. Parris had quarreled with, she had other sources for her accusations. Mary Beth Norton has recently uncovered a connection between George Burroughs (whom Ann first accused) and Mercy Lewis, a nineteen year-old servant in the Putnams household. Nortons groundbreaking research reveals the fact that Burroughs had been minister to the Maine town of Falmouth where both of Mercys parents died during Indian attacks. We will write a custom essay sample on Ann Putnam or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page Moreover, the afflicted girls seem to have entered into something of a conspiracy as time went on, so that in the case of Burroughs the name provided by the older Lewis was quickly echoed by Ann who initiated the accusation. By the time the trials had come to an end, Ann was largely responsible for the deaths of several witches including Rebecca Nurse, Mary Easty, and George Burroughs. Her evidence sometimes added details post-hoc, and was crucial to the trials. Years later, in 1706, she stood with head bowed before the village church congregation, and the new minister, the Rev. Joseph Green, read aloud her confession. In this document, which was likely written by Rev. Green, Ann begs forgiveness for her part in the trials, saying that she was deluded by the Devil and wishes to lie in the dust. Exactly how much guilt Ann was taking on in this apology is questionable, since it is more tailored to mending strife in the village than to allocating blame. In fact, the apology served as the spiritual testimony required to join the Puritan church and Ann was given Communion that same day. It is worth noting that she was the only one of the afflicted girls to make such a retraction. She died in 1715, unmarried.
Saturday, April 4, 2020
Solution Problems and Solutions Chap Essay Example
Solution Problems and Solutions Chap Paper You are considering a new project that has 50 recent more beta risk than your firms assets currently have, that is, its beta is 50 percent larger than the firms existing beta. The expected return on the new project is 18 percent. Should the project be accepted if beta risk is the appropriate risk measure? Pure play method 4. Interstate Transport has a target capital structure of 50 percent debt and 50 percent common equity. The firm is considering a new independent project that has an expected return of 13 percent and is not related to transportation. However, a pure play proxy firm has been identified that is exclusively engaged in the new line of business. The proxy firm has a beta of 1. 38. Both firms have a marginal tax rate of 40 percent, and Interstates before-tax cost of debt is 12 percent. The risk-free rate is 10 percent and the market risk premium is S percent. What should the firm do? S. Longest Corporation has a target capital structure that consists of 30 percent debt, 50 percent common equity, and 20 percent preferred stock. The tax rate is 30 percent. The company has projects in which it would like to invest faith costs that total $1,500,000. We will write a custom essay sample on Solution Problems and Solutions Chap specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on Solution Problems and Solutions Chap specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on Solution Problems and Solutions Chap specifically for you FOR ONLY $16.38 $13.9/page Hire Writer Longest will retain $500,000 of net income this year. The last dividend was $5, the current stock price is 575, and the growth rate f the company is 10 percent. If the company raises capital through a new equity issuance, the notation costs are ICC percent. The cost Of preferred stock is 9 percent and the cost of debt is 7 percent. (Assume debt and preferred stock have no notation costs. ) What is the weighted average cost Of capital at the firms optimal capital budget? 6. Lamina Motors just reported earnings per share of $2. 00. The stock has a price earnings ratio of 40, so the stocks current price is $80 per share. Analysts expect that one year from now the company will have an PEPS of $2. 40, and it will pay its first dividend of SSL . 00 per share. The stock has a required return of 10 percent. What price earnings ratio must the stock have one year trot now so that investors realize their expected return? Heavy Metal Corp.. Is a steel manufacturer that finances its operations with 40 percent debt, 10 percent preferred stock, and SO percent equity, The interest rate on the companys debt is 11 percent. The preferred stock pays an annual dividend of 52 and sells for 520 a share. The companys common stock trades at $30 a share, and its current dividend (DO) of $2 a share is expected to grow at a constant rate of 8 percent per year _ The flotation cost Of external equity s 15 percent of the dollar amount issued, while the flotation cost on preferred stock is 10 percent. The company estimates that its WAC is 12. 30 percent. Assume that the firm will not have enough retained earnings to fund the equity portion Of its capital budget. What is the companys tax rate? Anderson Company has four investment opportunities with the following costs (paid at t 0) and expected returns: Expected Project Cost C $2,000 3, coo 5, COO 3,000 Return 16. 0% 14. 5 11. 5 The company has a target capital structure that consists of 40 percent common equity, 40 percent debt, and 20 percent preferred stock. The company has 51,000 in retained earnings. The company expects its year-end dividend to be $3. 00 per share (DID = 001 The dividend is expected to grow at a constant rate of S percent a year. The companys stock price is currently $42. 75.
Sunday, March 8, 2020
How to Fake a French Accent
How to Fake a French Accent We love the beautiful accent that the French have when they speak English, and it can be fun or even useful to imitate it. If youre an actor, comedian, grand sà ©ducteur,à or even if you just have a French-themed Halloween costume, you can learn how to fake a French accent with this in-depth look at how the French speak English.* Please note that the pronunciation explanations are based on American English; some of them wont sound right to British and Australian ears. *Si vous à ªtes franà §ais, ne men voulez pasà ! Jai à ©crit cet article parce quil sagit dun sujet intà ©ressant et potentiellement utile. Franchement, jadore votre langue et jadore à ©galement votre accent quand vous parlez la mienne. Si vous voulez, vous pouvez utiliser ces tuyaux pour rà ©duire les traces de franà §ais dans votre anglais. Mais, mon avis, ce serait dommage. French-infused Vowels Nearly every English vowel is affected by the French accent. French has no diphthongs, so vowels are always shorter than their English counterparts. The long A, O, and U sounds in English, as in say, so, and Sue, are pronounced by French speakers like their similar but un-diphthonged French equivalents, as in the French words sais, seau, and sou. For example, English speakers pronounce say as [seI], with a diphthong made up of a long a sound followed by a sort of y sound. But French speakers will say [se] - no diphthong, no y sound. (Note that [xxx] indicates IPA spelling.) English vowel sounds which do not have close French equivalents are systematically replaced by other sounds: short A [à ¦], as in fat, is pronounced ah as in fatherlong A [eI] followed by a consonant, as in gate, is usually pronounced like the short e in getER at the end of a word, as in water, is always pronounced airshort I [I], as in sip, is always pronounced ee as in seeplong I [aI], as in kite, tends to be elongated and almost turned into two syllables: [ka it]short O [Ãâ], as in cot, is pronounced either uh as in cut, or oh as in coatU [ÃÅ ] in words like full is usually pronounced oo as in fool Dropped Vowels, Syllabification, and Word Stress When faking a French accent, you need to pronounce all schwas (unstressed vowels). For reminder, native English speakers tend toward rmindr, but French speakers say ree-ma-een-dair. They will pronounce amazes ah-may-zez, with the final e fully stressed, unlike native speakers who will gloss over it: amazs. And the French often emphasize the -ed at the end of a verb, even if that means adding a syllable: amazed becomes ah-may-zed. Short words that native English speakers tendà to skim over or swallow will always be carefully pronounced by French speakers. The latter will say peanoot boo-tair and jelly, whereas native English speakers opt for peant buttr n jelly. Likewise, French speakers will usually not make contractions, instead pronouncing every word: I would go instead of Id go and She eez reh-dee rather than Shes ready. Because French has no word stress (all syllables are pronounced with the same emphasis), French speakers have a hard time with stressed syllables in English, and will usually pronounce everything at the same stress, like actually, which becomes ahk chew ah lee. Or they might stress the last syllable - particularly in words with more than two: computer is often said com-pu-TAIR. French-accented Consonants H is always silent in French, so the French will pronounce happy as appy. Once in a while, they might make a particular effort, usually resulting in an overly forceful H sound - even with words like hour and honest, in which the H is silent in English.J is likely to be pronounced zh like the G in massage.R will be pronounced either as in Frenchà or as a tricky sound somewhere between W and L. Interestingly, if a word starting with a vowel has an R in the middle, some French speakers will mistakenly add an (overly forceful) English H in front of it. For example, arm might be pronounced hahrm. THs pronunciation will vary, depending on how its supposed to be pronounced in English: voiced TH [à °] is pronounced Z or DZ: this becomes zees or dzeesunvoiced TH [à ¸] is pronounced S or T: thin turns into seen or teen Letters that should be silent at the beginning and end of words (psychology, lamb) are often pronounced. French-Tinted Grammar Just as English speakers often have trouble withà French possessive adjectives, mistakenly saying things likeà son femmeà for his wife, French speakers are likely to mix upà hisà andà her, often favoringà hisà even for female owners. They also tend to useà hisà rather thanà itsà when talking about inanimate owners, e.g., This car has his own GPS. Similarly, since allà nouns have a genderà in French, native speakers will often refer to inanimate objects asà heà orà sheà rather thanà it. French speakers often use the pronounà thatà for a subject when they meanà it, as in thats just a thought rather than its just a thought. And theyll often sayà thisà instead ofà thatà in expressions like I love skiing and boating, things like this rather than ... things like that. Certainà singulars and pluralsà are problematic, due to differences in French and English. For example, the French are likely to pluralizeà furnitureà andà spinachà because the French equivalents are plural:à lesà meubles,à lesà à ©pinards. In the present tense, the French rarely remember to conjugate for the third person singular: he go, she want, it live. As for the past tense, because spoken French favors theà passà © composà ©Ã to theà passà © simple, the French tend to overuse the formers literal equivalent, the English present perfect: I have gone to the movies yesterday. In questions, French speakers tend not to invert the subject and verb,à insteadà asking where you are going? and what your name is? And they leave out the helping verbà do: what mean this word? or what this word mean? French-flavored Vocabulary Faux amisà are just as tricky for French speakers as they are for English speakers; try saying, as the French often do, actually instead of now, and nervous when you meanà à ©nervà ©. You should also throw in occasional French words and phrases, such as: au contraireà - on theà contraryau revoirà - good-byebienà sà »r !à - of course!bon appà ©tità - bon appetit, enjoy your mealbonjourà - hellocestdireà - that iscomment dit-on ___à ?à - how do you say ___?euhà - uh, umjeà veuxà direà - I meanmercià - thank younonà - nooh là là !à - oh dear!ouià - yespasà possible !à - no way!silà vousà plaà ®tà - pleasevoilà - there you go French Faces And, of course, theres nothing likeà gesturesà to make you look more French. We particularly recommendà lesà bises,à laà moue, theà Gallic shrug andà dà ©licieux.
Friday, February 21, 2020
Definition of Libel Research Paper Example | Topics and Well Written Essays - 3750 words
Definition of Libel - Research Paper Example This has an adverse effect of denying the public a chance to access important information, which they could have been freely exposed to, had there not been the stringent libel laws. However, according to Article 10 of the European Convention on Human Rights, as well as the requirements of the United Nation Commission on Human Rights, freedom of speech and expression has been guaranteed (Okrent, 2009). Thus, a myriad of jurisdictions has attempted to resolve the incumbent tension in various ways. Another emerging trend with regards to libel laws is the prevalence use of the internet to disseminate information, some which may constitute a libel. Consequently, many jurisdictions have had to extend the applicability of libel laws to incorporate libels committed over the internet. In the United States, libel is governed under the United States defamation law whose history dates back to the time of the American Revolution. Even so, due to the lack of an elaborate libel legal framework in t he United States over a long time, the libel laws were largely contingent on the traditional English common law of defamation. However, a remarkable case that laid the framework upon which defamation law was laid in the United States is the famous and prominent New York Times Co. v Sullivan case of 1964, in which the Supreme Court explored defamation claims regarding a public official. It was held that ââ¬Å"public officialsâ⬠were required to prove ââ¬Å"actual maliceâ⬠. Three years later, the Curtis Publishing CO. v. Butts played a palpable role in extending the ââ¬Å"actual maliceâ⬠standard to incorporate ââ¬Å"public figuresâ⬠which is rather wide and includes politicians, celebrities and other persons of high profile. Another remarkable case is the Gertz v.Robert Welch, Inc. which guaranteed the power of the states to establish their own standards of liability in libel cases. Using these cases, I establish the background of libel with regards to the sub stantial changes in the legal framework which governs libel. Much emphasis is placed on the English common law which forms the basis upon which libel law of many countries is based. In addition, the various defenses for libel are discussed at length. Finally, I discuss the applicability of the incumbent libel law to internet libel. New York Times Co. v. Sullivan, 376 U.S 254(1964) A remarkable libel case is a case involving the New York Times Co. v. Sullivan, 376 U.S 254(1964). This case involved the advertisement that featured in the New York Times, which sought to solicit funds aimed at defending Martin Luther King, Jr. who was facing charges of Alabama perjury inducement (Hall & Urofsky, 2011). Among other information in the advertisement, there were some inaccurate allegations including the mention that the Alabama State Police had arrested King several times. On the contrary, they had only arrested him on four occasions. Thus, the inaccurate criticism regarding the action of th e police against King was regarded as defamation especially against the Montgomery Public Safety Commissioner named L.B. Sullivan by virtue of his position as the supervisor of the police department. The Supreme Court later overruled the decision by the state court in Alabama which had initially found the New York Times guilty of libel based on the information printed in the advert (Hall & Urofsky, 2011).Ã
Wednesday, February 5, 2020
Proposal that lays out the security challenges faced by a large health Research Paper - 1
Proposal that lays out the security challenges faced by a large health care provider. In a loose sense, you are doing a risk assessment for ABC Hospital - Research Paper Example The units that are under security threat include infant, pediatric, pharmacy and psychiatric unit. One of the major security threats facing hospitals is one of terrorism. Terrorism is the most common security threat facing the world today. Terrorism is perpetrated by a group of people as a show of opposition to a particular authority. Terrorism is also conducted with an intention of inducing fear or causing great anxiety to a large population so that the group may become coerced to accede to particular demands of perpetrators. Hospitals are not immune to terrorisms as victims in such case can make the government given in to terrorist demands. Terrorists may access hospitals disguised as visitors or they can get in ambulances pretending to be bringing in emergency cases. Consequently, ABC should understand that it is not immune from terrorism and must therefore put measures to control access into the facility (Shukla 50). The other threat facing hospitals is the threat of fire. According to Shukla (50), threat of fire is a great challenge facing health care facilities given that in this environment; patients depend on the staff during the case of fire. The risk of fire increase due to lack of alertness, limited mobility and fixed equipments found in hospitals. In addition, the activities conducted within hospitals where flammable gases and liquids are used, laboratory processes where hazardous chemicals are used, and clinical research enhance the risk of fire in a hospital setting. In addition to destruction of the physical infrastructure, fire destroys hospital records and medication. To address the threat of fire, hospitals must therefore be designed with escape routes that can allow easy movement in case of emergency (Hoke 31). Furthermore, it is critical to install fire-fighting equipments and train the staff on these skills. Hospitals are also required to use technology that will allow detection of fire and
Tuesday, January 28, 2020
Mechanisms of V.cholerae Cytolysin (VCC)
Mechanisms of V.cholerae Cytolysin (VCC) V.cholerae cytolysin (VCC) is a pore-forming toxin secreted by many pathogenic strains of the Gram-negative bacteria V.cholerae the causative pathogen of diarrheal disease cholera. VCC display potent cytotoxic activity against the erythrocytes and mammalian cells. It is also reported to possess enterotoxin activity in terms of inducing bloody fluid accumulation in the rabbit ileal loops. Based on these observations, VCC has been believed as a potential virulence factor of V.cholerae. VCC, in particular, secreted by the pathogenic strain lacking ââ¬Ëcholera toxinââ¬â¢, the primary virulence factor of V.cholerae that responsible for inducing the massive dehydrating diarrhea disease during V.cholerae infection. VCC is encoded by the hlyA gene present in V.cholerae chromosome two. VCC toxin is synthesized as a ~ 81 kDa protein, called Pre-Pro-VCC. During the secretion of toxin, the N-terminal signal peptide composed of 25-residue is removed to generate a nonfunctional precursor form of the VCC molecule, named as Pro-VCC. Following, ~ 15 kDa N-terminal sequences from Pro-VCC is proteolytically deleted that resulting the formation of the functional mature form of the toxin. Proteolytic activation of the toxin is mediated by the HA/protease, which display the major extracellular proteolytic activity of V.cholerae. Conversion from Pro-VCC into the mature state of the VCC can also be obtained in vitro by other proteases like trypsin, chymotrypsin, and subtilisin. It has been reported that the activation of the Pro-VCC can be resulted by the proteolytic activity of the proteases present on the surface of the target host cell membrane as well. Functional mature form of the toxin has been displaying to induce lysis of the erythrocytes and other eukaryotic cells by generating the heptameric oligomeric pore structure of 1-2 nm diameters. The functional membrane permeabilization ability of the toxin could also be resembled in the membrane lipid bilayer of the synthetic liposomes. Along with its membrane permeabilization activity, VCC toxin also displayed a prominent lectin-like activity by binding to the complex glycoproteins and glycolipids with the terminal à ²1-galactosyl component. VCC is characterized as a member of à ²-PFTs and reported that the toxin follow the overall scheme of the generalized à ²-PFT mode of action. Structural Features of VCC VCC is secreted as a water-soluble monomeric form of the toxin, which after the removal of the N-terminal Pro-domain gets converted into the mature functional form of the molecule. VCC induces lysis of its target cells by generating heptameric oligomeric pores on the membrane. The high-resolution structure of the water-soluble, monomeric precursor state Pro-VCC toxin has been determined. Heptameric transmembrane structure of the VCC has also been determine recently. Many previous studies confirmed that the VCC is a à ²-PFTs family member, and the toxin employed pore-forming activity by generating the transmembrane heptameric à ²-barrel pores on the target cell membrane. Consistent with the à ²-PFTs tramsmembrane pore structure, pore complex of VCC represent a mushroom-shaped organization, which can be divided into two parts: (a) transmembrane b-barrel structural, and (b) membrane interacting rim domain. Structural analysis of the VCC molecule highlights many unique features which are not reported in the archetypical member of à ²-PFTs family. Consistent with the structural of archetypical à ²-PFTs, VCC harbors a central cytolysin domain that constitutes the core structure of the mushroom-shaped oligomeric transmembrane pore structure. The cytolysin domain contains the pore-forming stem-loop of the toxin. Apart from cytolysin domain, VCC structure also contains three additional structural domain which are not commonly documented in any other member of b-PFTs family: an N-terminal Pro-domain in the inactive Pro-VCC precursor state of the toxin, and two lectin-like domain name à ²-Trefoil domain and à ²-Prism lectin-like domain at the C-terminal side of the cytolysin domain. Cytolysin domain The VCC molecular structure contains 325 amino acid long cytolysin domain that structurally similar with the cytolysin domains present in the member of à ²-PFTs like S. aureus à ±-hemolysin. Cytolysin domain of the VCC during the membrane pore-formation process inserts its ââ¬Ëpre-stemââ¬â¢ region into the lipid bilayer and generates à ²-barrel structure on the membrane and provides the central scaffold of the pore structure. VCC generate mushroom-shaped oligomeric transmembrane pore structures that can be classify into two major parts: (a) transmembrane region that make the à ²-barrel pore structure, and, (b) membrane interacting rim-domain that interact with the membrane surface. The membrane inserted à ²-barrel structure of the VCC pore structure is composed solely of the central cytolysin domain of the toxin. Notably, the majority of the rim-domain is also generated by the cytolysin domain. Cytolysin domain of the toxin harbors the 42-residue long ââ¬Ëpore-forming loopââ¬â¢ loop that involve in the formation of the transmembrane à ²-barrel pore structure. In the water soluble monomeric form of the toxin, this region remains completely folded against the cytolysin domain, in the form of a so named ââ¬Ëpre-stemââ¬â¢ motif. During the process of the functional pore-formation, the ââ¬Ëpre-stemââ¬â¢ loop from each of the participating protomers undergoes enormous structure recognition to obtain a so-called ââ¬Ëstemââ¬â¢ configuration, and inserted into the lipid bilayer of the membrane. Stem region from each of the protomers contributes two à ²-strands towards the formation of the stem region of the heptameric à ²-barrel pore structure. Heptameric oligomer highlights that the stem regions make the extensive interaction between the neighboring protomers and hence contribute towards the robust stability of the transmembrane oligomeric assembly. Apart from the pore-forming stem-loop segment, other part of the cytolysin domain contains the membrane-proximal rim-domain of the transmembrane pore structure. Structural analysis of the à ²-PFTs pore, suggests that the membrane-proximal rim-domain work as the structure motif for transmembrane pores. Rim-domain acts as structural scaffolds that mediate interaction of the protein with the lipid head-group of the target membrane lipid bilayer. Cytolysin domain of the VCC contributes towards the interaction of the toxin with the lipid head-group of the membrane. Pro-domain As mentioned previously, VCC toxin is secreted by yet bacteria as the water-soluble inactive precursor state called Pro-VCC. The high resolution three-dimensional structure of Pro-VCC molecule shown the presence of ~ 15 kDa Pro-domain, which make contact to the N-terminal of the core cytolysin domain through a 29-residue long flexible linker.The linker region harbors ~ amino acid long structural motif that act as the cleavage site(s) for a group of proteases. Proteolytic removal of the Pro-domain at this linker sequence resulted in the generation of a mature form of the toxin. The presence of the Pro-domain in the precursor form of the toxin has been reported to be critical for the efficient secretion and the appropriate folding of the VCC molecule. One earlier study has been reported that the recombinant V.cholerae cells, containing the deleted variant of hlyA gene lacking the sequence for the Pro-domain, unable to secrete the protein outside the bacterial cells. In vitro denaturati on/renaturation, assay have demonstrated that without the Pro-domain VCC fails to refold back to its active conformation, whereas Pro-VCC can obtain proper refolding. Recent study on Pro-domain, suggested that the presence of Pro-domain increase the unfolding property of the Pro-VCC molecule in response to many denaturing conditions, whereas mature active form of the toxin display considerable resistant towards the unfolding of the toxin. Overall, these studies suggested, the Pro-domain show an intramolecular chaperone-like activity in term of providing significant level of structural plasticity in the VCC structure, which probably essential for the efficient secretion of the toxin in its precursor from across the bacterial membrane. However, itââ¬â¢s not clear so far how the presence of the Pro-domain keep the protein in its precursor form. à ²-Trefoil lectin-like domain: VCC harbors a à ²-Trefoil lectin-like domain (~ 15 kDa) at the C-terminal edge of the center cytolysin domain. This à ²-Trefoil lectin-like domain is also present in related cytolysin from Vibrionaceae bacteria, but not present in the archetypical à ²-PFTs protein for example S. aureus à ±-hemolysin. The à ²-Trefoil lectin-like domain is associated with the cytolysin domain through a short linker sequence constitute of Gly-Gly-Arg-Pro. The à ²-Trefoil lectin-like domain of VCC display structural similar to the carbohydrate-interacting domain of the plant toxin ricin, and featured the presence of the QXW conserved carbohydrate-interacting motif (s) observed in the archetypical à ²-Trefoil lectin domains of carbohydrate binding lectins. However, the carbohydrate binding propensity of the à ²-Trefoil domain of VCC has not been elucidated. Also, the implications of the à ²-Trefoil domain in the structure-function mechanism of the VCC need to be explored in future. à ²-Prism lectin-like domain: The VCC harbors an additional ~ 15 kDa domain that is linked to the C-terminal of the à ²-Trefoil domain through the long linker sequence.This domain is not present in any other member of the à ²-PFTs family, including the cytolysin secreted by V.vulnificus and Aeromonas hydrophilia.The C-terminal domain of the VCC display structural similarity to several à ²-Prism lectins including jacalin and Maclura pomifera agglutinin (MAP). VCC à ²-Prism lectin-like domain possess a binding pocket similar to the carbohydrate-binding site of the jacalin and MPA lectins. Recently, we have conclusively established the role of à ²-Prism domain in the lectin activity of the toxin. In the absence of the à ²-Prism domain, VCC toxin did not show lectin activity towards à ²-1 galactosyls terminated glycoconjugates. We have identified the critical site within the à ²-Prism domain which responsible for the lectin activity of the toxin. We reported that the amino acid tried (composed of Asp617, Tyr6 54, and Tyr679) located within the putative carbohydrate-interacting pocket generate the crucial element for the VCC lectin activity. Overall, it has been established that the à ²-Prism domain of the VCC act as structural scaffold playing a critical role in the lectin-like activity of the toxin. During the process of functional pore-formation in the lipid bilayer of the target host membrane, VCC molecule undergoes enormous structural reorganization. The à ²-Prism domain of the VCC obtained two different positions with respect to the core cytolysin domain, in the monomeric precursor form (Pro-VCC) and the transmembrane pore structure. In monomeric water-soluble inactive precursor Pro-VCC, the à ²-Prism domain positioned on the opposite side of the Pro-domain on top of the pre-stem region, whereas in the transmembrane pore structure it is relocated in the place of the Pro-domain. This structural rearrangement of the à ²-Prism domain is mandatory for the membrane insertion, and the functional oligomeric pore-formation procedure. In the absence of such structural reorganization of the à ²-Prism domain, it would be located in such a way that would generate steric hindrance between the contributing protomers and subsequently block the oligomerization of the toxin. Also, without such reorganization of the à ²-Prism domain, the pre-stem loop would not be able to unfold for the membrane insertion of the toxin. Overall it appears that the à ²-Prism domain-mediated lectin activity of the toxin might act as a triggering mechanism to allow such structural reorganization of the à ²-Prism domain with respect to core cytolysin domain. Our study suggested that the presence of the à ²-Prism domain in VCC molecule is critical for the efficient membrane pore-formation of the toxin. The à ²-Prism domain truncated variant of the toxin display abortived membrane pore-formation. However, in the absence of à ²-Prims domain, VCC molecule could generate membrane-associate oli gomers but does not show any functional membrane pore-forming activity. Structural reorganizations during oligomeric pore-formation: Structural analysis of the water-soluble monomeric form and the transmembrane oligomeric structure of VCC reveal that the VCC molecule undergoes structural reorganization within the toxin monomer during the process of the oligomeric transmembrane pore-forming procedure. The most critical structural change is the unfolding the ââ¬Ëpre-stemââ¬â¢ region from the cytolysin domain, and its insertion into the lipid bilayer to generate ââ¬Ëstemââ¬â¢ configuration. In the water soluble monomeric structure of Pro-VCC, the ââ¬Ëpre-stemââ¬â¢ region remains packed between the b-Prism domain and the cytolysin domain of the toxin. Hence, the movement of à ²-Prism domain is essential for the conversion of ââ¬Ëpre-stemââ¬â¢ to the ââ¬Ëstemââ¬â¢ region of the toxin. During the formation of the functional pore-formation of the toxin on the membrane, the à ²-Prism domain of the toxin reorients with respect to the central cytolysin domain by almost 180o angle, and attends the location where the Pro-domain was located in the Pro-VCC molecule structure. This reorganization of the à ²-Prism domain of the VCC represents the second most critical structural change involved in the membrane pore-formation of the VCC toxin. The structural change in the position of the à ²-Prism allows the ââ¬Ëpre-stemââ¬â¢ to undergo the reorganization for the following membrane insertion and the functional heptameric pore-formation process. Structural Features of the VCC à ²-Barrel Pore Earlier study based on the Transmission electron microscopy (TEM) characterized the transmembrane oligomer of VCC as typical ring-like structures with the inner diameter of almost 1-2 nm. Inhibitions in the cell cytotoxic ability by the osmoprotectants of defined molecular sizes have also advised similar pre diameter for VCC oligomer pore. Single channel conductance measurement by using the VCC oligomeric pore generated in the synthetic lipid bilayer suggested that VCC produce anion-selective diffusion channels. This analysis also indicated that the VCC pore is having asymmetric pore geometry: larger opening in the ââ¬Ëcis-sideââ¬â¢ than in the ââ¬Ëtrans-sideââ¬â¢ with a narrow region at the central part of the human. The high-resolution structure of the VCC oligomer suggests ââ¬Ëcup-shapedââ¬â¢ lumen geometry of the pore. Analysis of the oligomeric pore structure also suggests that the narrow constriction near the central of the pore lumen is generated by the aroma tic ring of a tryptophan residue contributed by each of the participating protomers during heptameric pore-formation. Mechanism of Membrane Pore-formation The functional pore-formation of the à ²-PFTs involve on the membrane lipid bilayer of the target cells involves three distinct steps: (i) interaction of the water-soluble monomeric form of the toxin towards the target cell membrane; (ii) self-assembly of the membrane-associated monomeric toxin to generate the intermediate ââ¬Ëpre-poreââ¬â¢ oligomeric assembly on the membrane surface; (iii) conversion from the transient ââ¬Ëpre-poreââ¬â¢ oligomeric assembly to the functional transmembrane pore structure. During the process of the pore-formation, the pore-forming ââ¬Ëstem-loopââ¬â¢ of the toxin inserted into the membrane lipid bilayer and generates the transmembrane à ²-barrel structure. Many structural studies reported that the member of à ²-PFTs follow the similar way of pore-formation on the membrane. However, each member of the à ²-PFTs family differs from each other in the definite step towards the pore-formation process. Membrane interaction step displays e normous range of variation in term of receptor specificity, the role of different lipid component and presence of specific carbohydrate receptor on the membrane. Notably, the molecular mechanism that involve the discrete steps for the functional pore-formation are not properly elucidate for most of the à ²-PFTs members. The pore-formation on the membrane by VCC can resemble in the synthetic lipid bilayer liposomes indicating that the membrane association step does not critically required any particular non-lipid components. However, the membrane pore-formation is reported more efficient in the biomembrane as compared to that in the synthetic lipid bilayer of the liposomes, indicating the role of extra molecule present on the cell membrane plays significant role in the pore-formation process. For example, erythrocytes are more susceptible compared to the liposome. Notably, VCC toxin displays a different level of hemolytic activity towards the erythrocytes of the different species. R abbit erythrocytes are found to exhibit more sensitive as compared to the human erythrocytes. Earlier studies have suggested the role of many cell surface receptor proteins (e.g., glycophorin B on the human erythrocytes) as a potential receptor molecule for the VCC toxin. VCC displayed potent lectin-like activity towards the interacting with the cell membrane. However, the specific receptor for the VCC has not been identified. The formation of the transmembrane oligomeric pore structure can be induced in the presence of the synthetic lipid bilayer liposomes. A previous study suggested that the binding of the VCC molecule with the liposomes driven mostly by global amphiphilicity of the monomeric state of the toxin. However, the self-assembly of the toxin and membrane pore-formation has been observed more specific events required the specific components of the membrane. More importantly, the presence of the cholesterol in the lipid bilayer of the membrane has been reported to play cri tical role in the membrane pore-formation of the toxin. In our recent study, we identified the specific lipid-binding structure motif present within the cytolysin domain of the toxin. However, our study suggested that the specific motif is responsible for the lipid association in general not specific towards the cholesterol presence in the lipid bilayer of the membrane. In the pore-formation process of the VCC, the ââ¬Ëpore-forming loopââ¬â¢ of the toxin unfolds and insert into the membrane toward the generation of the functional pore-formation. It is reported that the trapping of the pore-forming stem-loop in its pres-stem configuration through engineered disulfide linkage could arrest the toxin in its pre-pore oligomeric assembly. Also, a VCC variant without the pre-stem loop is found to remain arrest in the pre-pore oligomer on the membrane surface. Overall these studies suggested that the VCC follows the archetypical à ²-PFTs mechanism of pore-formation. A previous study indicated that the membrane interaction of the VCC precedes membrane oligomerization. Many environmental factors also affect the binding and oligomerization events of the toxin. For example, membrane association can occur even at a low temperature of 4 oC while the membrane oligomerization and functional pore-formation blocked under the similar condition. This observation clearly indicated that the association of the toxin with the target cell membrane is distinct step from its subsequent oligomerization and pore-formation steps.
Sunday, January 19, 2020
United Biscuits :: United Biscuits Business Management Essays
United Biscuits 1. Introduction United biscuits were founded in 1948 with the merger of two Scottish family businesses, these were McVities and the Price and McFarlane Lang group. It was developed furthermore when they acquired Crawfordââ¬â¢s Biscuits and MacDonaldââ¬â¢s Biscuits. More recently in 2000, United Biscuits was bought by Finalrealm who were a consortium of investors and the company reverted to a private company status. 2. Ownership In 2000 United Biscuits were bought by a consortium of four businesses, these four businesses own different percentages in the company which is dictated by the amount of money which they invested. The four businesses were Cinven who own 30%, PAI Partners who also own 30%, Nabisco who own 25% and finally MidOcean Partners who own 15%. United Biscuits were reverted to being a private limited company, this is unusual because private companies tend to be smaller than public companies and often are family businesses. To be a private company there must be at least two shareholders, which United Biscuits have two more than the minimum. Shares in privately owned companies cannot be traded on the Stock Exchange and often shares can only be bought with the permission from the board of directors. The board of directors is a group of officials whose job it is to protect the shareholdersââ¬â¢ interests, they also choose the managing director who looks after the daily running of the company. With private limited companies the shareholders choose the board of directors, who then choose the management, this is done at an annual shareholders meeting. Companies that are private have limited liabilities and this may make them more attractive to stakeholders in the company because they are only liable for their share value. Shares are a good way of generating capitol for new ventures because they can release shares for a certain amount and depending on how many they sell they will have an instant rise in capitol. There are only a few disadvantages in comparison to an unlimited liability business, they have to share the profits out between the shareholders and decisions canââ¬â¢t be made quickly, they also cost more to set up. United Biscuits could become a public limited company, and to do this they would have to float their stocks on the Stock Exchange. One of the main benefits of doing this is that large amounts of capital can be raised very quickly, to every ââ¬Å"up-sideâ⬠there must be a ââ¬Å"down-sideâ⬠and this is that the control of the business can be lost if large amounts of shares are bought because this would possibly result in a takeover. To become a public company the directors must apply to the Stock
Saturday, January 11, 2020
Watching Television Is Bad for Children
Television is an ever-present form of entertainment and information in modern society. Although there are many excellent educational programs, I believe that television may not be good for children. This is because television can make children more violent due to violent content and because television may have a negative influence on childrenââ¬â¢s schoolwork. One problem is that television makes children more aggressive. Oftentimes, especially in the evenings and on cable television there is a lot of violence depicted in programs.Children are often exposed to these programs, and there are some people that believe that these programs can even make children more violent. In the news, there was a story about a young boy who was watching an action movie that had a lot of fighting. The boy tried some of the things that he saw in the movie on his younger brother and put him in the hospital. The problem is that many of the characters in movies that are performing violent actions are sup posed to be the heroes, and children want to mimic the actions of their heroes. In a young mind, seeing as children are copying heroic action, they do not see it as a wrong behavior.Another big problem with television is that it may have a negative influence on childrenââ¬â¢s schoolwork. Every moment spent in front of a television screen is one less moment spent on more productive activities. In recent years, educators have pointed out a drop in academic performance, and one of the culprits may be television. When children are at home, especially alone, they tend to turn on the TV in order to be passively entertained. However, there is no learning going on when one just sits and watches TV. That is much easier than putting thought into schoolwork.Television can be addictive and cause children to spend more time watching TV than doing their homework. Children have to be monitored to make sure that the bulk of their time is spent on the more important activities, such as learning. Television can be an entertaining way to spend free time as long as it is not abused. However, children especially need to monitored when they watch TV. This is because there is evidence that television violence is causing some children to be more aggressive, and TV may also be harming children academically. As with anything, watching too much television is bad for children. Watching Television Is Bad for Children Do you agree or disagree with the following statement? Watching television is bad for children. Use specific reasons and examples to support your opinion. Most people in the world including children use to watch TV at least two hours per day. Some people believe watching TV may pose several negative effects for their children, while others think that TV provides more benefits for children than negative effects. These two points of view will be discussed accordingly.In the modern world there are many different programs, movies and cartoons which are interesting for all children. Some parents complain that their children use to watch TV for a long time, while they are at work, which results to a slow progress at school and also make their lifestyle less active. This is evidenced in how many children like to watch the ââ¬ËNickelodeonââ¬â¢ channel and even know the names of most characters in many cartoons. It is obvious that children prefer to spend their time watching TV than doi ng daily homework for school purposes or going in for sports.On the other hand, many argue that watching TV poses advantages to childrenââ¬â¢s intellectual capacities, because they may also watch many cognitive channels, for instance the ââ¬ËBBC Worldââ¬â¢, the ââ¬ËAnimal planetââ¬â¢ or the ââ¬ËDiscoveryââ¬â¢ which provide daily news or other interesting facts. In conclusion, watching TV is not bad for children, as it may develop their intellectual capacities. However parents should control what their children are watching and also do not allow them to watch TV more than two hours per day, because watching TV for a long time may pose several negative effects for their studies at school as well as for their health status.
Friday, January 3, 2020
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