Coagulation Definition (Chemistry and Biology)

Coagulation Definition (Chemistry and Biology) Coagulation is a gelling or clumping of particles, typically in a colloid. The term typically applies to the thickening of a liquid or sol, usually when protein molecules cross-link. When coagulation or clotting occurs in blood, it proceeds immediately after blood vessel damage. Two processes occur. Platelets change and the subendothelian tissue factor is exposed to plasma Factor VII, which ultimately forms fibrin. Primary hemostasis occurs when platelets plug the injury. Secondary hemostasis occrs as clotting factors strengthen the platelet plug with fibrin factors. Also Known As: coagulate, coagulating, clotting Examples of Coagulation Milk proteins coagulate to thicken the mixture that forms yogurt. Blood platelets coagulate blood to seal a wound. Pectin gels (coagulates) a jam. Gravy coagulates as it cools. Sources David Lillicrap; Nigel Key; Michael Makris; Denise OShaughnessy (2009). Practical Hemostasis and Thrombosis. Wiley-Blackwell. pp. 1–5. ISBN 1-4051-8460-4.Pallister CJ, Watson MS (2010). Haematology. Scion Publishing. pp. 336–347. ISBN 1-904842-39-9.

TheIndonesianpatternofgenocide essays

TheIndonesianpatternofgenocide essays The guidelines for genocide have been set. All the rules that clarify exactly what constitutes the act the crime of genocide have also been set forth. The U.N has even made the act of genocide a crime, punishable by death or life in prison. But, with that being said, the act of genocide and severe human rights violations still occur in todays complex and violent world. This is no more apparent than in East Timor. Timor is an island nation located at the southeastern end of the Indonesian archipelago. No larger than the state of Connecticut in the U.S.A. it has over 700,000 people. Just North of Australia, the island was colonized by the Portuguese in 1520. Over the next two centuries both the Dutch and the Portuguese claimed the island as their own. Eventually the island was divided with the Dutch taking the Western half and Portugal taking the Eastern half. East Timor remained a colony of Portugal for over four centuries until 1974. The population of East Timor as of 1975 was just under 700,000 people. Of that, 97% were natives of the island, while the Chinese made up 2% and the Portuguese made up the rest of the population. The island has a mountain range that runs through the middle that dominates the landscape. Most of the native peoples live in isolated villages. The main occupation is farming with some small coastal fishing villages scattered about. The Chinese run most of the trading outposts on the island. Christianity, specifically Roman Catholicism, is the major religion on East Timor, while the rest of Indonesia is strictly Islamic. As I will point out later, the difference in religion will play a significant role in some of the atrocities committed by the pro-Indonesian militias. The natives of Timor have experienced many episodes of conquest that included some form or other of genocide. The first occurred when the Portuguese originally colonized the island. The Portuguese were especiall...

History and Development of Corrections Essay Example | Topics and Well Written Essays - 750 words

History and Development of Corrections - Essay Example According to Ignatieff (1978), when U.S. attained independence from England in 1776, The Britons did not have a foreign protectorate where they could imprison people without costing a lot of money. Hence, the convict system started in 1776 as a backslash to the loss of American protectorates. It was essential to find an intermediate punishment, incorporating correction of the body and mind. Publication of The State of Prison in England and Wales- a book written by John Howard- in 1776 offered a significant information on the conditions of prisons and the prisoners contained there (Ignatieff, 1978). The public’s concentration turned towards the penal condition in England after reading this book. Howard had stumbled upon something that was significant in the eyes of public. In the 18thC, there were two types of prisons: the house of correction and the jail. The 18thC’s jail was almost similar to the one in the late 20thC. Furthermore, it also housed people waiting for tri al. This group of people included those who could not afford bail and those sentenced for a short period (Barnes, 1972). The prisons or jails were used mainly for the detention of those accused of crime awaiting their trial and for the imprisonment of debtors and religious political offenders. A true account is that they were hardly ever used for the imprisonment of the criminal classes. Semple (1993) asserts that a health reformer called Jeremy Bentham stepped into the prison debate using Howard’s work as a basis. He had concluded that there were three kinds of prisons. His concepts had developed upon what was initially thought of as the status quo. These three kinds of prisons included the Black Prison, the House of Safe Custody, and the Penitentiary House. The House of Safe Custody was similar to an 18thC jail (Semple, 1993). Bentham believed that its main function was to house those waiting for trial and debtors. Nevertheless, the difference between the two was that, unli ke a jail, the House of Safe Custody did not imprison people sentenced for a short period. Penitentiary House was the second prison. It was a step above the House of Safe Custody. This is where temporary incarceration took place. In order to differentiate roles of the jail, these roles were divided between the Penitentiary House and the House of Safe Custody (Semple, 1993). The last type of prisons established by Bentham was the Black Prison. This prison provided longer stays compared to the Penitentiary House (Semple, 1993). In the Black Prison, two skeletons were to lie together either side of an iron door so as to strike terror into the hearts of the inmates since it reminded them that they were certainly a house of death from which there was no escape. According to Pollock (2005), there were several alterations made within the convict system in England shortly after Bentham published his concepts of what a prison must be. The first, main change was the silent system’s tri al period in 1834. The silent system offered slightly more liberty to prisoners, but any form of communication was totally prohibited. Prisoners were not imprisoned to cells though they worked together on different outside projects (Pollock, 2005). A harsh punishment would be issued in the event that the silence was broken. This system finally paved way for the popular separate system. The introduction of the separate system was the second significant change. The separate system