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

Lord Of The Flies: Can Someone Be Innately Evil Or Innately Good? :: essays research papers

The difference in the way humans perceive things is part of the complexity of mankind. What is thought of as evil to one person can be seen as good to another, and vice versa. The issue of good and evil is brought up in William Golding’s Lord of the Flies, when innocent boys are set on an island to bear the weight of society on their backs. What happens to them? How do past influences effect them? Are their actions good or evil? The actions of the boys were not a matter of being good or evil, but were actions for survival. A man’s environment does not influence him towards good or evil, nor is he born with it inside. Man has instincts and inner drives that are not matters of good and evil, but of survival.   Ã‚  Ã‚  Ã‚  Ã‚  Humans are always, by natural instinct, going to do what is best for them and their survival. Animals, much like men, kill when in need. For instance, when they feel they are backed into a corner, they will attack, and when they need food, they will kill to eat. In Lord of the Flies, Ralph was being hunted by Jack’s tribe, and in a desperate attempt in his defense, he thrust his spear through a crack at the inspecting savages. Ralph attacked someone of his own kind for his own survival. It can be believed that man is the derivative of others animals, and as such, they have certain instincts that were instilled from birth. The boys on the island later began to resemble the behavior of animals. â€Å"At once the crowd surged after it, poured down the rock, leapt on to the beast, screamed, struck, bit, tore. There were no words, and no movements but the tearing of teeth and claws† (153). William Golding’s description of this scene leads a reader to believe that these boys took on animal like qualities. What kind of human tears with teeth and claws? The boys mistake Simon for their beast and result in ruthlessly killing him. In their state of mind of savagery and hunting, they saw themselves in danger of this â€Å"beast† and their first instinct was to kill anything in sight that had the possibility of being it. Humans and animals have a natural instinct to protect themselves in the face of danger, like attacking when backed into a corner. Lord Of The Flies: Can Someone Be Innately Evil Or Innately Good? :: essays research papers The difference in the way humans perceive things is part of the complexity of mankind. What is thought of as evil to one person can be seen as good to another, and vice versa. The issue of good and evil is brought up in William Golding’s Lord of the Flies, when innocent boys are set on an island to bear the weight of society on their backs. What happens to them? How do past influences effect them? Are their actions good or evil? The actions of the boys were not a matter of being good or evil, but were actions for survival. A man’s environment does not influence him towards good or evil, nor is he born with it inside. Man has instincts and inner drives that are not matters of good and evil, but of survival.   Ã‚  Ã‚  Ã‚  Ã‚  Humans are always, by natural instinct, going to do what is best for them and their survival. Animals, much like men, kill when in need. For instance, when they feel they are backed into a corner, they will attack, and when they need food, they will kill to eat. In Lord of the Flies, Ralph was being hunted by Jack’s tribe, and in a desperate attempt in his defense, he thrust his spear through a crack at the inspecting savages. Ralph attacked someone of his own kind for his own survival. It can be believed that man is the derivative of others animals, and as such, they have certain instincts that were instilled from birth. The boys on the island later began to resemble the behavior of animals. â€Å"At once the crowd surged after it, poured down the rock, leapt on to the beast, screamed, struck, bit, tore. There were no words, and no movements but the tearing of teeth and claws† (153). William Golding’s description of this scene leads a reader to believe that these boys took on animal like qualities. What kind of human tears with teeth and claws? The boys mistake Simon for their beast and result in ruthlessly killing him. In their state of mind of savagery and hunting, they saw themselves in danger of this â€Å"beast† and their first instinct was to kill anything in sight that had the possibility of being it. Humans and animals have a natural instinct to protect themselves in the face of danger, like attacking when backed into a corner.

Early Christian, Jewish, and Byzantine Art

Early Christian art spans from the first to fifth centuries followed by the vast era of Byzantine art from the fifth century to the 16th century in Eastern Europe. Much of the art during this period had a religious context or enacted a religious purpose. The paintings and mosaics were meant to remind worshippers of their God, and the architecture was meant to serve both functional and aesthetic purposes. When Constantine I issued the Edict of Milan in 313 and moved the center of the Roman’s empire from Rome to Constantinople, the Byzantine Empire and Constantinople became the center of power and culture. The architecture of the Christian era came in two forms: the basilica and central plans. The basilica plan typically contains a large nave, an apse and an atrium on either end, clerestory windows, and two side aisles along the nave. This plan is found in The Church of Santa Sabina. The central plan, or tholos, served as tombs, martyrs’ churches, or baptisteries. These plans typically contain either a sarcophagus or altar at the center and most often have a large dome on top. This plan is found in the Church of Santa Costanza and the Mausoleum of Galla Placidia, which employs the cruciform, or cross-shaped, style. Mosaics during the Christian era sometimes used syncretic images such as in Harvesting of Grapes in the ambulatory of the Church of Santa Costanza. The architecture of Byzantine art is characterized much by the Church of Hagia Sophia, or â€Å"Holy Wisdom. † This church combines the two floor plans of the Christian period, basilica and central. It has pendentives to hold its massive dome, flowing layers of half domes along its exterior wall, and many windows to let the gold on the mosaics shimmer. The Church of San Vitale is designed in a central plan but is interesting in that it has a very modest, unassuming exterior, but a complex, mosaic-covered interior. Two mosaics depicting Emperor Justinian and Empress Theodora represent how artists employed reverse perspective. The Transifguration of Christ as St. Catherine’s Monastery in Sinai depicts Christ in a blue mandorla which represents royalty and glory. The mosaics in later centuries depict Christ in a Pantokrator fashion: a bust level portrait of Christ with book in one hand and â€Å"peace† in other. This Late Byzantine art also depicts Christ in new ways, such as the Crucifixion and together with Mary in Virgin of Vladmir.

Essay about Joseph Stalin - 2651 Words

Joseph Stalin was the leader of the Soviet Union from 1922-1953, when he died. He was responsible for one of the most notable and devastating genocides, the Great Purge. His vicious reign took the lives of around 20-60 million people by his rigid and cruel treatment. Through his exploitation of the lower class and his manipulative abuse of power, Stalin created one of the worst examples of leadership in history. It takes an interesting character to be able to execute the cruelties displayed in his regime and the traits that Stalin developed into his cult of personality were likely acquired as a child and adolescent. This paper will discuss how Stalin’s background helped build the qualities of a ruthless leader and how he displayed them†¦show more content†¦Stalin had two wives; Ekaterina Svanidze (m. 1906–1907) and Nadezhda Alliluyeva (m. 1919–1932). He had three children with his first wife; Vasily Dzhugashvili, Svetlana Alliluyeva, and Yakov Dzhugashvili. He adopted a fourth son, Artem Sergeev. Stalin had an incredibly similar attitude to Vissorian as a child. He had a very cold personality and lacked a sense of empathy, especially towards his peers. One of his classmates reported that he had never seen him cry and that he greeted his peers with a snide chuckle instead of showing sympathy or compassion when he saw they were suffering. He was top and center in his school portrait. (This bared an unusual similarity to Adolf Hitler who took the same position in his school portrait). Stalin was born into poverty and suffered a series of health complications growing up. He suffered from small pox at a young age and his face was left permanently marked, resulting in nicknames like ‘pocky’ and ‘pock-marked-joe’. He was born with his second and third toe conjoined and due to blood poisoning; his right arm was made shortened and stiff. Stalin was abused by both his parents, his father in particular, although his mother claimed he had a wonderful childhood a nd home life. Stalin and Marxism Stalin learned about Marxism at a young age. He even studied and wrote about it prior to the revolution. However, once he was tasked with preserving it as a power in the USSR, he quickly demonstrated thatShow MoreRelatedEssay Joseph Stalin3070 Words   |  13 PagesJoseph Stalin Joseph Stalin was one of the biggest mass murderers of the twentieth century. From the purges in the Red Army to forced relocations, Stalin had the blood of millions on his hands. This essay is not going to debate the fact that this was indeed a brutal and power hungry individual, because he was indeed just that. I will on the other hand show you that through his way of governing the Soviet Union, he actually saved mother Russia from the German invasion in World War Two through hisRead MoreJoseph Stalin Genocide1421 Words   |  6 PagesJoseph Stalin’s Genocide: 50 Million Deaths From 1919 to 1953 when Stalin died about 50 million lives were taken in the Gulags of Russia (â€Å"Videofact†). In total there were 53 Gulags and 423 labor camps (â€Å"Gulag†).   Stalin was considered one of the most feared dictators because of his secret police and the Gulags. During a series of interviews in 1996, a Soviet veteran who lived in Minsk claimed to have seen a U.S. POW in May or June 1953. The POW was a Korean War F-86D pilot whose plane had beenRead MoreThe Death Of Joseph Stalin1829 Words   |  8 Pagesâ€Å"Death is the solution to all problems. No man - no problem.† This is a direct quote from one of the most notorious men in history, Joseph Stalin. 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He will forever be remembered as a cold blooded and heartless leader, who took the livesRead MoreEssay on Joseph Stalin2352 Words   |  10 Pages â€Å"The man who turned the Soviet Union from a backward country into a world superpower at unimaginable human cost (Joseph Stalin).† â€Å"Stalin was born into a dysfunctional family in a poor village in Georgia (Joseph Stalin).† Permanently scarred from a childhood bout with smallpox and having a mildly deformed arm, Stalin always felt unfairly treated by life, and thus developed a strong, romanticized desire for greatness and respect, combined with a shrewd streak of calculating cold-heartedness towardsRead MoreJoseph Stalin Research Paper1472 Words   |  6 Pagesgreat or corrupt; they are rarely both. Most of Russia’s history is filled with corrupt leaders. Joseph was one of those leaders. Stalin killed millions of people during his rule. But Stalin also led the Soviet Union almost to the top in world power. Stalin had many influences that led him to his Soviet Leadership in which gave him many admirers but even more non-supporters. At the age of 10, Joseph â€Å"Stalin† Djugashvili attended Gori’s religious elementary school. His mother, Yekaterina, wanted himRead MoreEssay on The life of Joseph Stalin554 Words   |  3 PagesThe life of Joseph Stalin Joseph Stalin. One of the Russias most supreme leaders. But one of its most horrid as well. He brought them up while also letting them down. Some could say where would we be without him. But others wish they never were led by him. He went from nothing to the most powerful man in the now most powerful country. In the early years. He was first born Josef Vissarionovich Djugashvili to a poor shoemaker of a father on December 21 1879. It was a small village calledRead MoreExecution By Hunger, By Joseph Stalin1081 Words   |  5 PagesExecution by Hunger 1. Collectivization was peasants being forced to give up their goods to the government. Collectivization started at the end of 1929 by Joseph Stalin. He began collectivization as part of the 5 year plan because he feared the invasion from the Allied countries in the west. He increased industrialization so he could earn more money just in case there was a war. This impacted the peasants of Ukraine because majority of the farmers had their own land it was their only way of incomeRead MoreJoseph Stalin And Vladimir Putin2340 Words   |  10 PagesJoseph Stalin and Vladimir Putin are two of the most famous and influential figures of Russian history. Joseph Stalin’s iron fist ruled Russia from the mid-1920’s until his death in 1953. Under Stalin’s totalitarian government, the Union of Soviet Socialist Republics played a pivotal role in several major conflicts, including World War II and the Cold War. Stalin’s main goal seemed to be expanding Russia and spreadi ng the influence of communism. 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