Versailles Persuasive Essay Example For Students

Versailles Persuasive Essay The Treaty of Versailles was intended to be a peace agreement between the Allies and the Germans. Versailles created political discontent and economic chaos in Germany. The Peace Treaty of Versailles represented the results of hostility and revenge and opened the door for a dictator and World War II. November 11, 1918 marked the end of the first World War. Germany had surrendered and signed an armistice agreement. The task of forming a peace agreement was now in the hands of the Allies. In December of 1918, the Allies met in Versailles to start on the peace settlement.The main countries and their respective representatives were: The United States, Woodrow Wilson; Great Britain, David Lloyd George; and France, George Clemenceau. At first, it had seemed the task of making peace would be easy.However, once the process started, the Allies found they had conflicting ideas and motives surrounding the reparations and wording of the Treaty of Versailles. It seemed the Allies had now found themselves engaged in another battle. We will write a custom essay on Versailles Persuasive specifically for you for only $16.38 $13.9/page Order now Woodrow Wilson (1856 1924), the twenty-eighth President of the United States (1913 1921).In August of 1914, when World War I began, there was no question that the United States would remain neutral. Wilson didnt want to enter the European War or any other war for that matter.However, as the war continued, it became increasingly obvious that the United States could no longer sit on the sidelines. German submarines had sunk American tankers and the British liner, Lusitania, in May 1915, killing almost twelve hundred people, including 128 Americans.This convinced Wilson to enter World War I, on the allied side. As the war continued, Wilson outlined his peace program, which was centered around fourteen main points. They (fourteen points) were direct and simple: a demand that future agreements be open covenants of peace, openly arrived at; an insistence upon absolute freedom of the seas; and, as the fourteenth point, the formation of a general association of nations.The fourteen points g ave people a hope of peace and lay the groundwork for the armistice that Germany ultimately signed in November 1918. Although the United States was instrumental in ending the war, Wilson was still more interested in a peace without victors than annexing German colonies or reparations (payment for war damages). However, as the Allies began discussions of the peace treaty, the European allies rejected Wilsons idealism and reasoning. It soon became increasingly obvious that the allies were seeking revenge and Germany was destined to be crippled economically and socially by its enemies. David Lloyd George (1863 1945), who was the Prime Minister of Great Britain (1916 1922), governed through the latter part of the war and the early post war years.Britain and Germany were, historically, always rivals. Before the war, for instance, Germany challenged Britains famous powerful and unstoppable navy by dramatically increasing the amount of money spent on their navy. In terms of losses, Britain absorbed thirty-six percent of the debt incurred by the allies and seventeen percent of the wars total casualties.After the war, Britain faced tough economic problems. Their exports were at an all time low due to outdated factories, high tariffs, and competition from other countries. As a direct result, Britain suffered from high unemployment, which of course, affected the well being of the country. Britain had its pride and nationalism stripped. The Treaty of Versailles would provide an opportunity to seek revenge for their losses. They were also seeking annexation of German colon ies in Africa. Georges Clemenceau (1841 1929) was the Premier of France (1906-1909) and (1917-1920).As Britain, France had a rivalry with Germany but the Frenchs ill feelings were even more intensive. Nationalism created tensions between France and Germany. The French bitterly resented their defeat in the Franco Prussian War and were eager to seek revenge. Moreover, they were determined to regain Alsace Lorraine.This gave the French the motivation of increasing their military strength and ultimately, destroying their life-long enemies. During the war, Frances portion of the war debt amounted to twenty percent. Their loss, in terms of war casualties, was thirty-three percent.Most of the battles were fought on French soil. This resulted in the destruction of ten million farm acres, twenty thousand factories and six thousand public buildings.After the war, France suffered terribly, economically. Inflation and a deflated French Franc spurned the French to take advantage of the armistice. Clemenceau wanted revenge as well as security against any future German attack.He also wanted a huge amount of reparations, to annex the coal rich Saar Basin, the return of Alsace Lorraine and an independent Rhineland for a buffer zone between Germany and France. .ue015988432580d7cf91e341fb64cf7fb , .ue015988432580d7cf91e341fb64cf7fb .postImageUrl , .ue015988432580d7cf91e341fb64cf7fb .centered-text-area { min-height: 80px; position: relative; } .ue015988432580d7cf91e341fb64cf7fb , .ue015988432580d7cf91e341fb64cf7fb:hover , .ue015988432580d7cf91e341fb64cf7fb:visited , .ue015988432580d7cf91e341fb64cf7fb:active { border:0!important; } .ue015988432580d7cf91e341fb64cf7fb .clearfix:after { content: ""; display: table; clear: both; } .ue015988432580d7cf91e341fb64cf7fb { display: block; transition: background-color 250ms; webkit-transition: background-color 250ms; width: 100%; opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; background-color: #95A5A6; } .ue015988432580d7cf91e341fb64cf7fb:active , .ue015988432580d7cf91e341fb64cf7fb:hover { opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; background-color: #2C3E50; } .ue015988432580d7cf91e341fb64cf7fb .centered-text-area { width: 100%; position: relative ; } .ue015988432580d7cf91e341fb64cf7fb .ctaText { border-bottom: 0 solid #fff; color: #2980B9; font-size: 16px; font-weight: bold; margin: 0; padding: 0; text-decoration: underline; } .ue015988432580d7cf91e341fb64cf7fb .postTitle { color: #FFFFFF; font-size: 16px; font-weight: 600; margin: 0; padding: 0; width: 100%; } .ue015988432580d7cf91e341fb64cf7fb .ctaButton { background-color: #7F8C8D!important; color: #2980B9; border: none; border-radius: 3px; box-shadow: none; font-size: 14px; font-weight: bold; line-height: 26px; moz-border-radius: 3px; text-align: center; text-decoration: none; text-shadow: none; width: 80px; min-height: 80px; background: url(https://artscolumbia.org/wp-content/plugins/intelly-related-posts/assets/images/simple-arrow.png)no-repeat; position: absolute; right: 0; top: 0; } .ue015988432580d7cf91e341fb64cf7fb:hover .ctaButton { background-color: #34495E!important; } .ue015988432580d7cf91e341fb64cf7fb .centered-text { display: table; height: 80px; padding-left : 18px; top: 0; } .ue015988432580d7cf91e341fb64cf7fb .ue015988432580d7cf91e341fb64cf7fb-content { display: table-cell; margin: 0; padding: 0; padding-right: 108px; position: relative; vertical-align: middle; width: 100%; } .ue015988432580d7cf91e341fb64cf7fb:after { content: ""; display: block; clear: both; } READ: Why Zebras Don't Get Ulcers EssayAll the leaders had different opinions and motives regarding the Treaty of Versailles. Coming to a consensus was difficult. The Treaty had to be revised several times before the final copy was signed on January 18, 1919. There was scarcely a section of the treaty which was not attacked, just as there was scarcely a section of the treaty which was not attacked.The Germans were reluctant to agree to such harsh terms. Even the most humble German was appalled by the severity of the treaty.France and Britain were both eager to have revenge on Germany but selfishly wanted each others benefits. Clemenceau pointed out that the British were making n o effort to placate the Germans at the expense of British interests. They offered no proposals to reduce the number of German ships to be handed over, or to return Germanys colonies, or to restore the German Navy, or to remove the restrictions on Germanys overseas trade. Instead, it was always at the expense of French interest that concessions were to be made.Wilson thought both France and Britain were being too vindictive and unreasonable. The allies used Wilsons Fourteen Points program to convince Germany to sign an armistice. However, once Germany complied, these points were ignored. The French, for example, had no intention of abandoning what Wilson castigated as the old diplomacy, with its secret understandings and interlocking alliances.Therefore, in the end, the European Allies, including France and Britain, received what they wanted from the treaty. The actual costs, for Germany, included: the guilt of the entire war and, paying 132 billion gold marks in reparations. Germany also lost one eighth of its land, all of its colonies, all of its overseas financial assets and limiting their once powerful military.Britain and France would receive large sums of the reparations and German colonies in Africa as mandates.France also received its wishes with Alsace-Lorraine. France would recover Alsace-Lorraine outright.However, the main delight for France and Britain was seeing Germany suffer. The biggest problem Germany had with Versailles was the war guilt, which was stated in article 231 of the Versailles Treaty. The Allies were astonished to find this particular paragraph was the most violently disputed point in the entire treaty. Article 231 stated: The Allied and Associated Governments affirm and Germany accepts the responsibility of Germany and her allies for causing all the loss and damage to which the Allied and Associated Governm ents and their nationals have been subjected as a consequence of the war imposed upon them by the aggression of Germany and her allies. It seems weird that they would treat Germany that way after they too had been in the war. Fighting and killing were done by both sides but only the Germans were punished. If our army and our workmen had known that peace would look like this, the army would not have laid down its arms and all would have held out to the end.All Germany became very upset about the whole treaty. This aroused intense nationalist bitterness in Germany.The future looked grim and had no cause for optimism in the near future. After Versailles was in stone, Germany became a very weak country, seeking to avenge the vindictiveness and total lack of empathy shown by the allies. The German people could not resist, but, in unanimity, they could still hate.Germany suffered from great economic problems after the war. They had already lost many lives and things during the war, but now they were responsible for paying the reparations. The Germans tried paying their debts by borrowing and printing more money. They were shocked to find that incredible inflation was the result. The hardships caused by the inflation of the 1920s contributed to the political unrest of Germany after WWI.After the war, Germany became a republic (called the Weimar Republic). The Weimar Republic had many problems from the very beginning. Many Germans despised it (the Republic) because its representatives had signed the hated Versailles Treaty.There were revolts by both a communism party and a fascism party. In the end, the fascists party wa s favoured because they were extreme nationalists, who denounced the Versailles Treaty and opposed the democratic goals of the Weimar Republic.With the rise of fascism came the rise of Hitler and his Nazi Party. .u6338e088e4b74ddb840ebd95ac71d525 , .u6338e088e4b74ddb840ebd95ac71d525 .postImageUrl , .u6338e088e4b74ddb840ebd95ac71d525 .centered-text-area { min-height: 80px; position: relative; } .u6338e088e4b74ddb840ebd95ac71d525 , .u6338e088e4b74ddb840ebd95ac71d525:hover , .u6338e088e4b74ddb840ebd95ac71d525:visited , .u6338e088e4b74ddb840ebd95ac71d525:active { border:0!important; } .u6338e088e4b74ddb840ebd95ac71d525 .clearfix:after { content: ""; display: table; clear: both; } .u6338e088e4b74ddb840ebd95ac71d525 { display: block; transition: background-color 250ms; webkit-transition: background-color 250ms; width: 100%; opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; background-color: #95A5A6; } .u6338e088e4b74ddb840ebd95ac71d525:active , .u6338e088e4b74ddb840ebd95ac71d525:hover { opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; background-color: #2C3E50; } .u6338e088e4b74ddb840ebd95ac71d525 .centered-text-area { width: 100%; position: relative ; } .u6338e088e4b74ddb840ebd95ac71d525 .ctaText { border-bottom: 0 solid #fff; color: #2980B9; font-size: 16px; font-weight: bold; margin: 0; padding: 0; text-decoration: underline; } .u6338e088e4b74ddb840ebd95ac71d525 .postTitle { color: #FFFFFF; font-size: 16px; font-weight: 600; margin: 0; padding: 0; width: 100%; } .u6338e088e4b74ddb840ebd95ac71d525 .ctaButton { background-color: #7F8C8D!important; color: #2980B9; border: none; border-radius: 3px; box-shadow: none; font-size: 14px; font-weight: bold; line-height: 26px; moz-border-radius: 3px; text-align: center; text-decoration: none; text-shadow: none; width: 80px; min-height: 80px; background: url(https://artscolumbia.org/wp-content/plugins/intelly-related-posts/assets/images/simple-arrow.png)no-repeat; position: absolute; right: 0; top: 0; } .u6338e088e4b74ddb840ebd95ac71d525:hover .ctaButton { background-color: #34495E!important; } .u6338e088e4b74ddb840ebd95ac71d525 .centered-text { display: table; height: 80px; padding-left : 18px; top: 0; } .u6338e088e4b74ddb840ebd95ac71d525 .u6338e088e4b74ddb840ebd95ac71d525-content { display: table-cell; margin: 0; padding: 0; padding-right: 108px; position: relative; vertical-align: middle; width: 100%; } .u6338e088e4b74ddb840ebd95ac71d525:after { content: ""; display: block; clear: both; } READ: The importance of information systems EssayAdolph Hitler, of the Nazi Party, preached a racist brand of fascism. His party kept expanding, benefiting from growing unemployment, fear of communism, Hitlers self-certainty, and the difference of his political rivals.When Hitler became chancellor in January 1933, he began rebuilding a promising future for Germany.He promised jobs and benefits to all classes of people. Almost all Germans felt compelled to listen and obey Hitlers extreme ideas of fascism because for some, he was their last hope. Hitler knew how to win peoples obedience, through their fears and insecurities. Hitler successfully appealed to a Germany that was humil iated by defeat in World War I and the Treaty of Versailles of 1919.Hitler succeeded and began to regain Germanys strength. Germany was too powerful to be suppressed for long.Hitler broke many rules contained in the Treaty of Versailles. For example, Hitler sent troops into the demilitarized Rhineland and the French did not respond. This and other scenarios gave Hitler the incentive to invade other countries and ultimately, invade Poland and started World War II. With WWII came the dreadful horrors of the Holocaust. Hitler had ordered the deaths of at least five million Jews.Not only did he orchestrate these mass murders, but he also influenced countless individuals to think and act in the same disgraceful manner. Hitler may have had sick and shameful ideas but he certainly knew how to be a manipulative leader. He played on the fears and insecurities of the people and used their weaknesses to win their loyalty. In conclusion, The Treaty of Versailles was supposed to represent the peaceful ending to World War I, however, it became the prelude to another war. It was originally an effort to restore order and provide a peaceful conclusion to World War I. The ill feelings and economic upheaval that resulted provided the perfect climate for Hitlers dominance, in post-war Germany. The contributors/participants of Versailles had other motives behind the peace agreement other than a peace settlement. Their selfish actions resulted in, not only the economic hardship of Germany, but inflation and unemployment in all of Europe. The severity of the reparations contained in this document set the stage for history to repeat itself. Therefore, the very way in which the Treaty of Versailles was forced on the German people stored up the material for the next round.

Bill Clinton Leadership

Bill Clinton Leadership Introduction Bill Clinton is one of the most famous politicians in the History of the United States of America. He served as the governor of Arkansas and later on became the president of the United States of America serving between 1993 and 2001 (Mas 325).Advertising We will write a custom essay sample on Bill Clinton Leadership specifically for you for only $16.05 $11/page Learn More It is during his reign as the president that USA exhibited the concept of effective leadership. This was achieved through the leadership of President Bill Clinton. This essay shall therefore focus on Bill Clintons leadership qualities, styles and the success that he achieved as president. To achieve this, the essay shall focus on the qualities that Clinton had and the impacts of his administration during the two terms that he served as president. Leadership of Bill Clinton For an individual to be an effective leader, he/she needs to possess several qualities. Such an individual needs to be visionary, understanding, rational, conscious of the culture, team player, ambitious, reliable, possess communication and social skills, humble, able to influence masses and be knowledgeable (Cohen 8). Bill Clinton possessed most of these qualities. This may have contributed greatly into developing him into a successful and effective leader. In the process of his leadership, Bill Clinton experienced ups and downs. An example is his demise was his scandal with Monica Lewinsky. It should be noted that during the time when Clinton was facing this scandal, he remained confident and charismatic. He was not destructed and performed his duty as the president of the United States to the best. This showed that he had empathy; a factor that enabled him to maintain a positive public figure. Giving the United States priority at this time proved that Clinton was an effective leader (Mas 327).Advertising Looking for essay on government? Let's see if we can help you! Get your first paper with 15% OFF Learn More USA, like many other nations all around the world has always been striving for social, political and economic sustainability. Despite the fact that the nation has always been regarded as one of the best in terms of socio-political and economic sustainability, it is during the reign of Bill Clinton that USA experienced much of its economic growth. Through his leadership practices and policies, USA experienced a tremendous growth in its economy from 1993-2001. An effective leader is one who keeps the promises that he has made to his people. During his presidential campaign, Bill Clinton made several promises to the people. He vowed that he would improve the economy of the United States. Clinton became the president of USA just after the end of the Cold War, a period that USA spent a lot of money in the race for arms supremacy. As a result, the nations economy was in a deficit. Thus, as a result of this economic recession, USA require d strong economic strategies that would lead to economic recovery. To achieve this, Clinton came up with a combination of economic, fiscal and economic policies with an aim of modernizing the government of the United States (Stewart 15). This made the government to be entrepreneur oriented. As a result, much of the powers that were concentrated on the central government were distributed to federal and local governments. This resulted to an increase in the government efficiency and a reduction of the size of the central government hence incurring lower costs as compared to the expenditure of previous regimes. Clinton came up with tight monetary policies that reduced the expenditure of governmental institutions (Stewart 17). For instance, Clinton implemented the tight monetary proponents. This implementation had an effect of stabilizing and reducing the consumer price index.Advertising We will write a custom essay sample on Bill Clinton Leadership specifically for you for on ly $16.05 $11/page Learn More As a result, goods and services within the nation became more affordable to a larger proportion of the population. Clinton also implemented several monetary policies. In 1997, Clinton passed the Taxpayer Relief Act into law that reduced the tax rate on capital investments from 28% to 20% (Stewart 18). This increased the rate at which individuals made in investments within the nation. It also increased the rate of foreign investments hence boosting the economy. The employment rate in USA during the Clinton administration also increased. Increasing the employment rate was one of the promises that Clinton made to the people during his 1992 campaigns. To deliver his promise, Clinton through his administration managed to create over 22 million jobs. This tremendously increased the GDP of USA between 1993 and 2001 (Mas 326). Clinton also managed to reduce the national deficit that had accumulated as a result of the arms race during the cold wa r. Before Clinton became the president, USA had a trade deficit of -90.500 USDs. When Clinton left office, the trade deficit was roughly above -400,000 USDs (Stewart 14). To ensure that this economy is maintained, Clinton embarked on a trade expansion activity. It is during this time that he developed warm diplomatic relations with countries such as Mexico and China. With the desirable relationship that these nations developed, trade between then also improved especially after the free trade deal was passed (Robinson 470). Conclusion Bill Clinton is one of the renowned and leaders in the history of the United States as a result of the role that he played in reviving the national economy amongst other things. During his reign, he also managed to achieve social and political sustainability. He also possessed desirable leadership qualities that made him to be an effective leader. This made him to an effective leader. Cohen, Simon. â€Å"Effective Global Leadership Requires a Global M indset.† Industrial  and Commercial Training 4.2 (2010): 3-10. Print.Advertising Looking for essay on government? Let's see if we can help you! Get your first paper with 15% OFF Learn More Mas, Andrew. â€Å"Racial Bias in USA Presidential Election.† American Economic Review 99.2 (2010): 323-29. Print. Robinson, Allan. â€Å"Global Leadership in a Cultural Diverse World.† Management  Decision 46.3 (2008): 466-80. Print. Stewart, Benjamin. â€Å"Race, Region, and Vote Choice in the US Elections: Implications for the Future of the Voting Rights Act.† Harvard Law Review 3.2 (2010): 11-18. Print.

Lambda and Gamma Levels of Association

Lambda and Gamma Levels of Association Lambda and gamma are two measures of association that are commonly used in social science statistics and research. Lambda is a measure of association used for nominal variables while gamma is used for ordinal variables. Lambda Lambda is defined as an asymmetrical measure of association that is suitable for use with nominal variables. It may range from 0.0 to 1.0. Lambda provides us with an indication of the strength of the relationship between independent and dependent variables. As an asymmetrical measure of association, lambda’s value may vary depending on which variable is considered the dependent variable and which variables are considered the independent variable. To calculate lambda, you need two numbers: E1 and E2. E1 is the error of prediction made when the independent variable is ignored. To find E1, you first need to find the mode of the dependent variable and subtract its frequency from N. E1 N – Modal frequency. E2 is the errors made when the prediction is based on the independent variable. To find E2, you first need to find the modal frequency for each category of the independent variables, subtract it from the category total to find the number of errors, then add up all the errors. The formula for calculating lambda is: Lambda (E1 – E2) / E1. Lambda may range in value from 0.0 to 1.0. Zero indicates that there is nothing to be gained by using the independent variable to predict the dependent variable. In other words, the independent variable does not, in any way, predict the dependent variable. A lambda of 1.0 indicates that the independent variable is a perfect predictor of the dependent variable. That is, by using the independent variable as a predictor, we can predict the dependent variable without any error. Gamma Gamma is defined as a symmetrical measure of association suitable for use with ordinal variable or with dichotomous nominal variables. It can vary from 0.0 to /- 1.0 and provides us with an indication of the strength of the relationship between two variables. Whereas lambda is an asymmetrical measure of association, gamma is a symmetrical measure of association. This means that the value of gamma will be the same regardless of which variable is considered the dependent variable and which variable is considered the independent variable. Gamma is calculated using the following formula: Gamma (Ns - Nd)/(Ns Nd) The direction of the relationship between ordinal variables can either be positive or negative. With a positive relationship, if one person ranked higher than another on one variable, he or she would also rank above the other person on the second variable. This is called same order ranking, which is labeled with an Ns, shown in the formula above. With a negative relationship, if one person is ranked above another on one variable, he or she would rank below the other person on the second variable. This is called an inverse order pair and is labeled as Nd, shown in the formula above. To calculate gamma, you first need to count the number of same order pairs (Ns) and the number of inverse order pairs (Nd). These can be obtained from a bivariate table (also known as a frequency table or crosstabulation table). Once these are counted, the calculation of gamma is straightforward. A gamma of 0.0 indicates that there is no relationship between the two variables and nothing is to be gained by using the independent variable to predict the dependent variable. A gamma of 1.0 indicates that the relationship between the variables is positive and the dependent variable can be predicted by the independent variable without any error. When gamma is -1.0, this means that the relationship is negative and that the independent variable can perfectly predict the dependent variable with no error. References Frankfort-Nachmias, C. Leon-Guerrero, A. (2006). Social Statistics for a Diverse Society. Thousand Oaks, CA: Pine Forge Press.

Quantitative and Qualitative Methods of Research Assignment

Quantitative and Qualitative Methods of Research - Assignment Example Measurements of data in a big population are carried out through random sampling. Random sampling does not give an accurate measurement in people since people are different from each other as compared to elements tested in natural sciences that are always identical (Graham, 2008). The best approach to measurement that should be used in the measurement of people and society is the use of a computerized sampling method that is programmed to practice simulation. Use of computerized sampling will ensure that the whole population is well represented (Davies, 2007). Both qualitative and quantitative types of research need to be valid and reliable to enhance their use by analysts. The validity of these research methods ensures the connection of the research carried out and the theoretical ideas of the researcher (Chikkodi and Satyaprasad, 2010). Much of it refers to the generalizability of the findings in both the quantitative and qualitative research. In a bid to assess, the validity of these two types of validity in research, their credibility and transferability aspect is very important (Connaway and Powell, 2010). The credibility aspect is used to determine whether the findings in the research seem believable while the transferability aspect determines whether the findings of the research are applicable in another context. Reliability of these types of research refers to the situation in which more than one observer of the study agrees with the findings (Katsirikou and Skiadas, 2012). A good example is how an efficient apparatus in laborator y gives accurate data.

International law Assignment Example | Topics and Well Written Essays - 2000 words - 1

International law - Assignment Example aw was catalyzed by international trade, which required merchants from one state to be protected against the activities of other merchants of another state. With the increase in international trade, warfare and exploration the need for international law became essential. Treatises between nations became useful as they were intended to be binding between the nations. The proliferation of treatises, practices, rules and customs became complex and scholars started to compile them into systematic treatises. Hugo Grotius provided the first comprehensive conception of international law in his treatise â€Å"De Jure Belli Ac Pacis Libri Tres† (Schmitt 2008). Grotius’s conception of international was grounded on natural law, human reason and custom. His argument in respect to natural law is that relations between nations should be governed by an international body based on divine justice and morality. The law between nations should be governed by the law of the people, established through the consent of the nations and founded on commitment and observance. In his view, things were either good or bad by their nature. According to Grotius, law is not derived from above but from principles which include maxims that promises must be honored and restitution is required for harm to others. These two values have served as the foundation for international law. Additionally, Grotius took a positivist view of international law. In his perspective, emphasis should be given to what is done as opposed to what ought to be done. It is noteworthy that although Grotius based his perspective of international law on natural law, he also posits that nations can create binding rules between themselves. Grotius was instrumental in the formation of the concept of international society. In this respect an international society is a community held together by believes that nations have rules that apply to all of them. Written agreements and customs form the basis of the law that governs this

Muscarinic Acetylcholine Receptors In The Pig Urinary Bladder Biology Essay

Muscarinic Acetylcholine Receptors In The Pig Urinary Bladder Biology Essay Background and purpose. This investigation sought to identify the principal muscarinic receptor subtype associated with contraction of the pig bladder. Additionally, comparisons of muscarinic receptor expression in the pig bladder and caudate nucleus were conducted. Experimental approach. Contractility of isolated strips of pig bladder was assessed using isotonic tension recordings in an organ bath. Radioligand binding to particulate preparations from pig caudate nucleus and bladder detrusor was assessed using [3H]-quinuclidinylbenzilate. Key results. The results obtained from the contractile response experiment showed that the best antagonists for pig bladder contractions were methoctramine, pirnezepine and oxybutynin, this was according to the pEC50 data. These results led to the identification of the presence of M1 and M3 receptor subtypes in the bladder. Whereas M1 and M2 receptor subtypes were found to occur in the brain. Pirenzepine exhibited the smallest Rmax value, and was therefore the most successful antagonist. Whereas 4-DAMP had the largest Rmax value, identifying this as the worst antagonist. Conclusions and Implications. It is clear that M3 muscarinic receptors are found in the bladder, but are absent in the brain. This is made more certain as 4-DAMP showed fairly low affinity for muscarinic receptors in the bladder, but its affinity was higher than that recorded in the brain which is known to contain a low amount of M3 receptors. 4-DAMP also has the highest affinity recorded in the brain, due to binding at the M1 muscarinic receptor. Introduction There are five distinct types of muscarinic receptors (M1,M2,M3,M4,M5), all of which belong to the same family of G-protein-coupled receptors. M1 receptors are found mainly in the cortex and hippocampus of the brain, but also on the CNS and peripheral neurons. These receptors are excitatory, this excitation is produced by a decrease in potassium ions which causes membrane depolarization. M2 receptors exert inhibitory effects; they are present in the heart and so are of little importance in this experiment. M3 receptors reside in smooth muscle. These receptors are excitatory and produce vasodilatation and bronchodilatation, via an increase in intracellular calcium levels. As this experiment includes analysis on the effects of muscarinic antagonists on muscarinic receptors in the brain and bladder, it is mainly the M1 and M3 receptors which are being concentrated on. The aim of the experiment was to add a range of antagonists pig bladder tissue, and then recording the effect each had on the tissues contraction. The five antagonists used in the experiment were atropine, pirenzepine, methoctramine, 4-DAMP and oxybutynin. Each of the antagonists used are able to bind to muscarinic receptors, but they bind to different subtypes as they have differing affinities. Atropine is a non-selective antagonist, which acts via competitive inhibition of muscarinic acetylcholine receptors. It is a naturally occurring alkaloid which can be found in solanaceous plants, for example the deadly nightshade (Atropa belladonna). Atropine causes anti-cholinergic effects such as mydriasis, salivary inhibition, tachycardia, inhibition of GI motility and smooth muscle relaxation. It can be used clinically to treat anticholinesterase poisoning, bradycardia and GI hypermotility. Pirenzepine is a muscarinic receptor antagonist, and is slightly selective for the M1 sub-type. It is used clinically for the treatment of peptic ulcers, whereby it inhibits gastric acid secretion. Methoctramine is a slightly M2 selective antagonist. It has also been found to show selectivity for cardiac M2 muscarinic receptors, but to have low affinity for both vascular M2 and ganglionic M1 receptors. 4-DAMP is a slightly M3 selective antagonist, although it has only low affinity. There is no clinical use for 4-DAMP, it is mainly used in experiments for the analysis of muscarinic receptors. Oxybutynin is a non-selective muscarinic antagonist. It is used clinically to decrease muscle spasms of the bladder in patients suffering from frequent urination or urge incontinence. During the contractile experiment these antagonists will be used to determine which of the muscarinic receptors are present in the bladder, and which occur in the greatest amount. The same antagonists will then be used in the radioligand experiment, to compare each of their effects on brain tissue. Once both experiments are performed, the results can be used to compare the presence of muscarinic effects in the bladder and brain tissue. Materials and Methods Contractile response studies Strips of urinary detrusor were stored overnight at 4  °C in Krebs Ringer solution [composition (mM): NaCl (118); KCl (4.9), MgCl2 (1.2); KH2PO4 (1.2); D-glucose (12); NaHCO3 (25); CaCl2 (1.3); gassed with O2:CO2 (95:5)], as previously described (Lot and Wilson, 1994). On the morning of the experiment, tissue was removed from the refrigerator and allowed to equilibrate to room temperature. Thereafter, strips were mounted in an organ bath at 37  °C in Krebs Ringer solution. Contractility was monitored using isotonic transducers connected to CED 1502 amplifiers and recorded on a personal computer running Spike 2 software (CED, Cambs, UK). A steady baseline was then achieved for 20 minutes before 1ml 3M KCl was added to 50ml of Krebs solution (in water bath), to achieve a final concentration of 60mM. The tissue was then washed out three times once a maximal response was recorded, and this was then left for a further 20 minutes until a steady baseline was achieved once again. 10 dilutions containing varying concentrations of carbachol were then prepared in LP4 tubes, using 3-fold dilutions. A cumulative-concentration curve was created by adding the preparation containing the lowest concentration of carbachol to the organ bath first. After waiting for 7 minutes, the next preparation with a higher concentration was added. This process was repeated without washing out the tissue, until there was no further increase in tissue tone recorded. Once this part of the experiment was completed, the tissue was washed out 3 times with warm Krebs solution. This was followed by the addition of the putative antagonist and the tissue was left for 60 minutes. After achieving a steady baseline, a cumulative-concentration curve was created by carrying out the same process with increasing concentrations of carbachol as before; but this time in the presence of the putative antagonist. The results were printed off once the process was completed. Radioligand binding studies Radioligand binding to total particulate preparations from the pig was conducted essentially as previously described (Alexander et al., 1994). Briefly, tissue was homogenised in 10-30 volumes of 0.1 M phosphate buffer (pH 7.5) using an Ultra-Turrax homogeniser. After centrifugation at 30 000 g for 15 minutes at 4 °C, the supernatant layer was discarded. This homogenisation/centrifugation cycle was repeated twice more and the resulting pellet was re-suspended in 10 volumes. After storage at -20  °C, thawed tissue was incubated in a total volume of 500  µL 0.1 M phosphate buffer (pH 7.5), containing 0.25 nM [3H]-QNB for 30 minutes at 37  °C. Rapid filtration with repeated washing allowed isolation of bound radioligand, which was then estimated using liquid scintillation counting. A dilution curve was prepared using 10-fold dilutions once the drug was provided, this contained the highest concentration. 32 LP4 tubes were labelled 1-32 and these were placed in test tube racks. 50  µl aliquots of different concentrations of drug were then added to tubes 5-28, with each being made up to 500  µl by adding 450  µl of buffer. 50  µl of buffer was added to tubes 1-4, these acted as a control whilst atropine was added to the remained tubes 29-32. 400  µl of the radioligand was added to each of the tubes, with 50  µl of particulate preparation being added to the tubes in groups of 10 at 12 minute intervals. Once this process was completed, the tubes were incubated in a water bath at 37 °C for 30 minutes. The Whatman GF/B filters were placed in the 10-place manifold and were wet using the buffer solution. Ten of the tubes were then removed from the water bath, and 3ml of ice-cold buffer was added to each of them. They were filtered immediately after this process. Once two additions of 3ml of ice-cold buffer had taken place on each filter paper, they were washed. This was repeated for each of the LP4 tubes, once incubation in the water bath was halted on their removal. The filter papers were then placed into labelled scintillation vials, they were then analysed. Data analysis and statistical procedures There are equations which can be used to analyse the data collected in the experiment, once the information has been put into a concentration curve graph. The first equation used is the Gaddum equation: pKi = log (CR 1) log [Ant] In order to make use of this equation it is neccessary to work out the EC50, which is the effective concentration of drug required to give 50% of the maximum response. This EC50 value can be obtained from the concentration curve, as it is at 50% of the maximum response on the graph. The results collected from the graphs were Molar, these can be converted to  µM by multiplying the values by 106. These values can now be used to produce a concentration ratio, indicating the EC50 response with and without the presence of the antagonist. Graph 1 shows bladder tissue contractile responses to histamine in the presence of different concentrations of promethazine. The EC50 values recorded for histamine and promethazine were -6.5 and -5 respectively. By converting these Molar values to  µM by using the technique stated above, histamine 0.316  µM and promethazine 3.16  µM can be inputted into the Gaddum equation. The pKi value which is calculated in this equation is an indication of potency of the antagonist used, and a high pKi indicates a high affinity for the receptor. The pKi in this case was -8.5. As the radioligand was being carried out, calculations were made in order to work out the Kd and Bmax. The equation used in the radioligand binding experiment was the Cheng-Prusoff equation: IC50/Ki = 1 + [A]/Kd To work out the pKi, the same process as the contractile response experiment is used. Then the pIC50, the concentration of the antagonist which displaces 50% of the ligand, can be calculated. It is then necessary to work out the IC50 value to be used in the Cheng-Prusoff equation, this is achieved by -log of the pIC50 value. Finally, -log of the Ki obtained from the equation gives a pKi value of 8.2. Drugs, chemicals, reagents and other materials Porcine material (from pigs of the modern Hybrid white strain, either sex, approximately 50-70 kg) was obtained from an abattoir and transported rapidly to the laboratory on ice. [3H]-QNB (specific activity 1591 GBq mmole-1) was obtained from Amersham Pharmacia Biotech (Herts, UK), while muscarinic receptor ligands were all obtained from Sigma (Dorset, UK). All drug and molecular target nomenclature conforms to the British Journal of Pharmacologys Guide to Receptors and Channels (Alexander et al., 2008). Results Table 1. Contractile response results: Drug pEC50 Rmax Concentration Ratio pKi Atropine 4.5 131 20.9 9.1 Pirenzepine 4.3 109 42.6 7.4 Methoctramine 4.3 50.2 7.1 4-DAMP 4.6 139 37.9 9.2 Oxybutynin 4.3 210.5 8.1 Water 4.7 116 5.0 Table 1 shows the results obtained from the contractile response experiment, whereby the pig bladder tissue was exposed to five antagonists and the contractility of the tissue was measured. Table 2. Radioligand binding results: Brain Bladder Drug pKi SEM pKi SEM Atropine 9.8 0.1 9.8 0.1 Pirenzepine 7.7 0.2 8.0 0.6 Methoctramine 8.0 0.0 7.7 0.1 4-DAMP 9.2 0.0 8.4 0.1 Oxybutynin 7.4 0.0 7.8 0.0 Carbachol 4.8 0.1 4.3 0.0 Table 2 shows the results obtained from the radioligand experiment, which identified the different muscarinic receptors found in the brain and bladder tissue. Discussion and conclusions The conclusions that can be made from the results are that the main types of muscarinic receptor involved in the contraction of the bladder are the M1 and M3 receptor. Whereas, M1 and M2 muscarinic receptor subtypes occur in the brain. Therefore, an ideal drug for therapeutic treatment of urge incontinence and bladder dysfunction would be M3 selective. This would not have any adverse effects in the brain, as M3 receptors are not present in this part of the body. Bladder contractions occur due to activation of muscarinic receptors leading to an increase in intracellular calcium, which causes contraction of the smooth muscle. The results collected in the contractile response experiment were due to antagonism of M1 and M3 receptor subtypes. 4-DAMP recorded a pKi value of 9.2, a value which corresponded with the M3 subtype and was the highest of all the antagonists. This antagonist is M3 selective but also has affinity for the M1 muscarinic receptor; this may have caused its high pKi value to be due to binding at this muscarinic receptor subtype. Atropine recorded the second highest pKi, 9.1 .This was to be expected as it is a non-selective antagonist, with high affinity for each of the muscarinic receptor subtypes able to cause contraction of the bladder tissue. Oxybutynin recorded the third highest pKi value, 8.1. Oxybutynin has a slightly higher affinity for the M3 muscarinic receptor, therefore the pKi value is due to binding at this receptor subtype. Pirenzepine, being an M1 selective antagonist, would be expected to have a similarly high pKi to 4-DAMP. This was not the case as pirenzepine only recorded a pKi of 7.4, a value expected to be obtained from M3 selective antagonists. Methoctramine recorded a pKi value of 7.1, the lowest of all the antagonists. Although it is an M2 selective antagonist, the pKi value leads to the conclusion that contractile response is due to the presence of M1 or M3 receptors. The results obtained in the radioligand experiment revealed that mostly M1 and M2 muscarinic receptors occur in the brain. Methoctramine has low affinity at the M1 receptor, even so, the results recorded in the experiment showed the antagonist to have high affinity. The pKi range of the M2 receptor subtype for methoctramine is 7.8-8.3. Therefore, the recorded pKi value of 8.0 suggests the presence of M2 receptor subtypes in the brain. The pKi of 8.0 is quite far from the pKi range of methoctramine for the M3 receptor subtype, leading to the conclusion that there are a small number of M3 receptors in the brain. Atropine, perenzepine, 4-DAMP and oxybutynin antagonists are able to act at the M1 muscarinic receptor and each of these antagonists possess similar affinities for the receptor. Atropine (pKi 9.8) and oxybutynin (pKi 7.4) are both non-selective antagonists, so as in the contractile response will have fairly high affinities for any of the muscarinic receptor subtypes present in the brain. Perenzepine recorded a pKi value of 7.7; this failed to fall into any of the pKi ranges expected for the muscarinic receptors. The value was closest to the M1 subtype range (7.8-8.5). The SEM recorded was the highest of all the antagonists (0.2) concluding that some of the results may have been anomalous, with most of the pKi values falling within the M1 range. The Pki range of pirenzepine for the M3 receptor subtype is 6.7-7.1. The pKi recorded, much like that of methoctramine, was quite far from the M3 range. 4-DAMP recorded a high pKi of 9.2. This pKi value fell into the ranges for both the M1 and M3 muscarinic receptors, showing high affinity of the antagonist for both subtypes. In this experiment the pKi value recorded was with respect to the M1 receptor, not the M3 subtype. The non-selective muscarinic antagonist oxybutynin is the principle drug used to treat urge incontinence. This antagonistic drug possesses anticholinergic and antispasmolytic properties, which together act on the bladder to inhibit micturition. However, there are significant adverse effects associated with this choice of therapeutic treatment; such as dry mouth, constipation and blurred vision. These side effects highlight the non-selectivity of oxybutynin as each occurs due to antagonism at the M1 receptor. The radioligand binding experimental results show that oxybutynin has a pKi of 7.8 in the bladder, which is only slightly higher than the pKi of 7.4 recorded in the brain. These pKi values indicate that oxybutynin is slightly more selective towards the M3 receptor subtype present in the bladder. However, it is evident that the antagonist also has significant affinity towards the M1 and M2 receptor subtypes which are present in the brain. There were a few limitations encountered in both parts of the experiment. The contractile response experiment was carried out for a fairly short amount of time, more reliable results could be obtained by increasing the amount of time that the experiment is undertaken. As not all of the tissues used in the experiment were of the same source or size, the results obtained were inconsistent the responses recorded were of varying degrees. By ensuring every piece of tissue is the same size, more accurate and reliable could be obtained. Human error when collecting and interpreting the data in the experiment could have caused considerable variations in the results recorded. During the radioligand binding experiment complications arose due to contamination, with various external factors such as temperature and buffer strength affecting the results.

Driving While Using Cell Phones

Abstract of Cell phone and drivers research paper This report assesses the risks and benefits associated with cellular phone use while driving. The interest of policymakers in this issue has been heightened by the recent decisions of selected foreign countries and several U. S localities to restrict or prohibit the use of cellular phones while driving. The weight of the scientific evidence to date suggests that use of a cellular phone while driving does create safety risks for the driver and his passengers as well as other road users.The magnitude of these risks is uncertain but appears to be relatively low in probability compared to other risk in daily life. It is not clear whether hands-free cellular phone designs are significantly safer than hand-held designs, since it may be that conversation rather than dialing or handling is responsible for most of the attributable risk due to cellular phone use while driving. The benefits of using this communication device while driving appear to be important.They include benefits to the users, households, social networks, businesses, and communities. Many of these benefits, which include public health and safety considerations, have not yet been recognized or quantified. Simple suggestions that drivers can â€Å"pull over† on the side of the road to make calls from cellular phones are unrealistic and, in certain situations, potentially dangerous. It is not know which of the benefits of cellular phone use would be foregone under various regulatory scenarios.Cellular phone use while driving should be a concern of motorists and policymakers. We conclude that although there is evidence that using a cellular phone while driving poses risks to both the driver and others, it may be premature to enact substantial restrictions at this time. Indecision about whether cellular phone use while driving should be regulated is reasonable due to the limited knowledge of the relative magnitude of risks and benefits.In light of thi s uncertainty, government and industry should endeavor to improve the database for the purpose of informing future decisions of motorists and policymakers. In the interim, industry and government should encourage, through vigorous public education programs, more selective and prudent use of cellular phones while driving in order to enhance transport safety.