Scientific journal (Nuclear Medicine) Essay Example | Topics and Well Written Essays - 1000 words

Scientific journal (Nuclear Medicine) - Essay Example he application of the methods may facilitate the noninvasive imaging of therapeutic tumor responses to specific drug treatments to provide a reliable index of their potential efficacy and as a monitor of mechanisms of action in the selective destruction of tumor cells. The research article discusses the potential for the expanded use of quantitative PET molecular imaging to assess the efficacy of novel targeted therapeutics in the treatment of cancer. The use of radiolabelled biomarkers serves as a molecular tag which can be traced using PET imaging tools to delineate the molecular interactions between a targeted drug and the tumor cells destined for destruction. The implementation of the molecular tools allows researches to determine whether the drug effectively interacts with its selected target and the concentration of drug that actually reaches the tumor site following drug administration. Non-specific interactions of the drug with non-tumor tissue may also be assed using this methodology. The authors reviewed the results of several clinical trials of this methodology used to assess the efficacy of several important new classes of targeted chemotherapeutics, including protein tyrosine kinase inhibitors (PTKIs) and epidermal growth factor recep tor (EGFR) ligands. In the latter case, several drugs approved for cancer treatment by the US FDA, including lapatinib, gefitinib ,and erlotinib, were assessed using this nuclear medicine application. Each of these drugs has produced equivocal results in patients with lung cancer and other tumors that overexpress the EGFR. Several research trials involving labeled chemotherapeutics were cited and data presented indicated that in some cases, reliable data were produced by this nuclear medicine molecular assessment approach. The authors have presented a compelling theoretical argument to support the use of PET imaging technology in the molecular assessment of therapeutic responses to targeted cancer drugs. This

Competition, Monopoly, and Oligopoly & Monopolistic Competitive Market Term Paper

Competition, Monopoly, and Oligopoly & Monopolistic Competitive Market Structure - Term Paper Example The research explained briefly on the perfect competitive market structure and revealed some features of this market structure. It described the way firms maximize profits with the help of diagrams, the researcher revealed the way they maximize profit at the equilibrium point in both short and long run. Lastly, the conclusion summed up the discussion, and the researcher provided some significant areas for further research study. The market is structured depending on varied factors and variation that determine the market structure of a particular firm in an economy. Competition is one of the factors or conditions that determines the structure of a firm. The economists assume that there are many buyers and sellers in the marketplace; hence, they compete favorably for the available products in the market. Therefore, competition in the market contributes to changes of prices for commodities; thus creating a shift in demand and supply curve. Furthermore, there are substitute products in t he marketplace; thus, when one product increases the prices, consumers chose the alternative of consuming substitute products. The buyers and sellers have the ability to influence prices for commodities, and this contributes to increased competition in the market. ... The buyers and sellers may exchange property rights and everyone in the market interacts voluntarily in order to achieve self-interest. The buyers and sellers interact; thus, they signal much information about the product through product prices. Successful sellers reduce prices in order to influence buyers and out-compete their competitor (Mankiw 2011, 36). The sellers can maximize profits in case the price exceeds the products costs. Monopoly A monopoly refers to a market structure whereby only a single producer or buyer for a commodity exists. The monopoly firms are the price makers because they are single sellers in the market. Monopoly is a single business firm and it is characterized by varied features including market restrictions because of high costs and production of homogenous products. The government has powers to control or restrict entries into the market by creating barriers. The barrier to market entry may result because the firm may have exclusive rights of accessing the natural resources. For instance, the Kenya Power and Lighting Company is a monopolistic firm because the government takes control over the resources. The same case applies to Saudi Arabia oil industry because the Saudi government is the sole control of the natural oil reserves. The market also have a patent right that impede other competitors from entering into the market. The monopoly firm is classified into numerous features including perfect monopoly whereby the single seller does not have substitute products. Therefore, there is no perfect competition, but such firms are extremely rare. Another one is imperfect monopoly whereby the single seller does not have close substitute products meaning that the

A Christmas Carol by Charles Dikens Essay Example | Topics and Well Written Essays - 500 words

A Christmas Carol by Charles Dikens - Essay Example The Past Ghost talked about Scrooge’s boyhood, love life as well as important events in his life which shaped his current negativist personality. For instance, it was told the Scrooge was lonely in his childhood with a dysfunctional family. He was abandoned to study at a boarding school where he eventually developed his antisocial tendencies. Here, we are given a reason why Scrooge could not offer any empathy because in his early developmental years, he had none. He was left to himself, with no affectionate encounters with his parents or his siblings. We highlight the young Ebenezer’s experiences of past Christmases because, it turned out, most unfortunate events happened during this time explaining for Scrooge almost neurotic hatred for the holiday. The story went to describe how Scrooge became obsessed with work and money that eventually drove Belle, his fiancà ©e to leave him. Apparently, business is the only avenue where Scrooge could excel and, perhaps, in his opinion, be appreciated, that is why he became a workaholic. The visit from the three ghosts has given Scrooge a new perspective. Presently, he was his old self – greedy, selfish, bitter and miserly with a particular disgust against Christmas. The ghosts have also shown how his nephew and his poor family, who merely lives on his pittance, were currently happy despite the fact that there was a lame son. When his future was shown to him along with the suggestion that he is being given an opportunity to change, Scrooge finally came around. There was the realization that upon his death, many people will celebrate due to the consequences of his actions. The past experiences seemed to be the major reason why Scrooge could not find it on his own to see how his character has degenerated almost beyond redemption. One of the distinct characteristics that mark Scrooge is his tendency to stifle his past. There seems to be a lot of pain in it for him, not only in what he

Contemporary Issues in Business (Individual Report) Essay - 1

Contemporary Issues in Business (Individual Report) - Essay Example Greenhouse emissions are currently projected to increase significantly within the next few decades which will cause an increase in global temperatures and subsequently put to great risk the human society and natural environment worldwide (Pedersen and Nordic Council of Ministers 2000). The temperature on the surface of the earth is largely determined by the balance between the energy that is constantly re-radiated to space from the earth mostly in the form of infra-red radiation and the energy that comes from the sun which is seen to be in the form of visible radiation (sunlight). When the sunlight passes through the earth’s atmosphere, it has relatively very little warming effect but when it finally manages to come into contact with the earth’s surface, it warms it and the earth in turn warms the atmosphere by both convection and via emission of infra-red radiation which are absorbed by the greenhouse gases (R.I.C. Publications 2007). The greenhouse gases eventually return some of the infra-red radiation back to the earth’s surface which ends up further warming the earth’s surface. An analogy of this chain of events is often made with reference to greenhouses which generally allow sunshine to pass through their clear plastic or glass which in turns stop the heat that is inside the green house from escaping into the atmosphere and hence the use of the term â€Å"greenhouse effect† (R.I.C. Publications 2007). Fossil fuels are formed when the bodies of living organisms die and remain compressed and heated over extremely long periods of time to form natural gases, oil and coal. When burned, fossil fuels are seen to produce significant amounts of energy a factor which causes them to be considered as an extremely valuable energy source. However, the burning of these fossil fuels produces the emission of carbon dioxide, resulting in the introduction into the carbon cycle of carbon that would have otherwise still remained trapped

Management by culture is another way of exercising control in Essay - 1

Management by culture is another way of exercising control in organizations. Critically discuss this statement with reference to issues of power, control and r - Essay Example In the process of understanding the management system and function in a work place, the culture should also be given a priority in exercising management system in a work place. Usually, work place often times have a lot of unresolved issues primary because each citizen who works together in a small unit of an office acquired ideas, concepts and values because they have different cultures. This is about the values, the upbringing that each individual possess or holds on to, and these concepts have a significant part on how an individual handles a business or any decision that they make in a working environment. Briefly, there are systems by which we can control and have a conducive working environment fit for all cultures and that will be discussed in the process of the paper. Each particular segment will provide a brief review of literature that have been stipulated and used by some corporation, which in the process provided a total shift and change of working relationship with fellow co-workers. Also, through the process of reorganization of working conditions, the collegues themselves found out that through management by culture, their work environment become much better and their work progress accordingly because they are able to connect and communicate with one another. One of the greatest mentors in Management was Alasdair MacIntyre. ... Probably, this method of making things done applied in the beginning, such that during the time of industrial evolution wherein the best place to earn and become productive is if a person is working in a factory or office or wherever. But the times have changed and people have developed a sense of pride and understand that force is not the way to make things work in an office set up. There had been a lot of rules and laws that have been passed on to addressed these unrighteous working condition. Now most companies are geared to a globalise community. Each organization has at least 10 different nationalities working together and need to co-exist accordingly beside the fact that they are also trying to understand the working ethics that is trying to unify their common goal and perspective to make certain and progress in the work place or community. To begin with we shall understand the important of management prior to proceeding with the cultural relationship that holds a crucial part in any management organization. According to one the Motivation book by W. Taylor, he said, "In dealing with the employees under this type of management, it is an inflexible rule to talk to and deal with only one person or staff at a time. Since each employee has their own special abilities and limitations, and also since we are not dealing with men in masses, but are trying to develop each individual person to his highest state of efficiency and prosperity. Our first step was to find the proper workman to begin with. We therefore carefully watched and studied these 75 men for three or four days, at the end of which time we had picked out four men

Vincent van gogh Term Paper Example | Topics and Well Written Essays - 1500 words

Vincent van gogh - Term Paper Example In 1877, Van Gogh arrived to Amsterdam to study theology, but failed the exam; he entered the missionary school in Brussels and became a preacher in Borinazhe, the mining district of Belgium. During this time he began to draw. Van Gogh held the winter of 1880-1881 in Brussels, where he studied anatomy and perspective. Meanwhile, his younger brother, Theo went to the department of â€Å"Goupil† in Paris. Vincent received from him not only a modest content, but also moral support, despite their frequent differences of their opinions. At the end of 1881 after a quarrel with his father, Van Gogh went to the Hague. For a time he studied at prominent landscape painter Anton Mauve. Van Gogh's eccentric behavior which was compounded by shyness, pushed away those who wanted to help him. He lived with a woman named Christina, who was from the lower strata of society, and he often depicted her on his paintings. When she left him, an artist in late 1883 returned to his parents, which live d in Nuenen. In that period (1883-1885) he began to show the originality of his creative manner. The master wrote with dark colors, subjects of his work were monotonous, they felt sympathy for the peasants and compassion for their hard life. The first large painting, created in nyuenensky period – â€Å"Potato Eaters† - depicts the peasants at dinner. Van Gogh went to Antwerp in 1885-1886. He attended classes at the Art Academy. The artist led a meager and half-starved existence. In February 1886, in a state of physical and mental exhaustion, he moved from Antwerp to his brother in Paris. Van Gogh entered the artist and academics Fernand Cormon studio, but more importantly for him was to become acquainted with the painting of the Impressionists. After two years, which he spent in Paris, Van Gogh could not bear the strong emotional stress; in February 1888 he went to Arles. In this Southern French city, he found an abundance of rural scenes which he liked so much. In th e summer of 1888 the artist created some of his most tranquil works. Van Gogh lived in solitude, eating only bread and coffee, and drank a lot. In these circumstances, the visit of Paul Gauguin in October 1888, which Van Gogh was waiting impatiently, has ended tragically. Gauguin’s Aesthetic Philosophy was not acceptable to Van Gogh; their disputes became more intense and fiercer. On 24 of December, Van Gogh, lost the ability to control himself, pounced on Paul Gauguin, and then cut off his ear. In May of 1889 he stayed in a psychiatric hospital in Saint-Remy voluntarily. Over the next year his mind cleared from time to time, and then he threw himself to write, but those periods were followed by depression and lethargy. During this time he wrote the famous landscapes of cypress and olive trees, still lives with flowers and pictures and he copied his favorite artists Millet and Delacroix from reproductions. In May of 1890 Van Gogh felt better, left the shelter and returned to the north, he settled in Auvers-sur-Oise at Dr. Paul Gachet, who was interested in art and psychiatry. In Auvers artist wrote his last works - two portraits of Dr. Gachet, the scenery of wheat fields under the hot disturbing sky, in which he tried to express ‘sadness and extreme loneliness.’ Finally, Vincent Van Gogh died on July 27, 1890. I think that I will not be wrong if we call Starry Night of Van Gogh the most popular canvas. This picture is recognized instantly. Its style is unique. Starry night inspires poets and the books are

Lab Report on TLC analisys of Analgestic Drugs Essay Example for Free

Lab Report on TLC analisys of Analgestic Drugs Essay In this experiment, thin-layer chromatography (TLC) was used to determine the composition of various over-the-counter (OTC) analgesics: Anacin, Bufferin, Excedrin, and Tylenol. The TLC plates were first viewed under ultraviolet (UV) light and then treated with iodine vapor in order to visualize the spotting. Experiment Scheme Initially, sixteen capillary micropipets were created in order to spot the TLC plates. Two TLC plates were then obtained and marked with pencil for spotting. A line was drawn 1 cm from the bottom of each plate, and five small, evenly spaced marks were made along those lines (see Figure 1). Each mark indicated where a substance would be spotted. All compounds used were in solutions of 1g of each dissolved in 20 ml of a 50:50 mixture of methylene chloride and ethanol. The first plate made was the reference plate. Capillary micropipets were used to spot the first four marks with acetaminophen, aspirin, caffeine, and salicylamide (in that order). (See figures 2-5 for chemical structures.) The last mark was spotted with a reference solution of all four chemicals. The second plate made was the sample plate. The first four marks were spotted with Anacin, Bufferin, Excedrin, and Tylenol. The fifth mark was spotted with a reference solution of all four drugs. Figure 1. Prepared TLC plates Figure 2. AcetaminophenFigure 3. Aspirin Figure 4. CaffeineFigure 5. Salicylamide A development container was created with a wide-mouthed screwcap jar. It was filled with the development solvent, which was .5% glacial acetic acid in ethyl acetate, so that the solvent was approximately . 5 cm deep.The first TLC plate was then carefully placed into the development container. Great care was taken to ensure that the plate went in evenly so that the solvent could rise evenly up the plate. Once the solvent front had reached approximately 1cm from the top of the plate, the plate was removed, the solvent front was marked with a pencil, and the plate was allowed to dry. The second plate was then placed in the development chamber in the same manner as the first. Once the solvent front reached approximately 1cm from the top of the plate, the plate was removed, the solvent front was marked with a pencil, and the plate was allowed to dry. Each plate was then viewed under the UV light. Any spots that were seen were lightly circled with a pencil, and their color was noted. The orders of elution (Rf values) were calculated by dividing the distance from the baseline to the center of the spot by the distance from the baseline to the solvent front. After all observations and calculations were made, the plates were placed in a jar containing iodine. The jar was warmed with hands so that the iodine vaporized. The plates were then removed from the jar and observed. The reference and sample plates were then compared to determine which compounds the drugs on the sample plate contained. Data