experiment is to identify an unknown proprietary drug using thin-layer chromatography. The unknown’s behavior in thin-layer chromatography will be compared with that of its possible component analgesics. The possible unknowns and their analgesic ingredients will be Anacin (aspirin‚ caffeine)‚ Excedrin (acetaminophen‚ caffeine‚ aspirin)‚ Motrin (ibuprofen)‚ and Tylenol (acetaminophen). Introduction Thin-layer Chromatography(TLC) was the method used to figure out and identify the drug. TLC is done
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The book As a Driven Leaf‚ by Milton Steinberg‚ poignantly depicts the internal conflict between faith and knowledge within Rabbi Elisha ben Abuya. Though the majority of the story is rooted in fiction‚ Steinberg accurately portrays the pain that results from the schism of convictions and the realities that contradict them. As a person who has experienced crises of faith‚ I deeply connected with this book. Rabbi Elisha struggles to coincide his values as a Jew with terrible events that he witnesses
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Lohmann Barbara- The last leaf by O. Henry THE LAST LEAF BY O. HENRY: A QUESTION OF HOPE AND SELFLESS SACRIFICE O. Henry was an American writer who is known as "The master of the short stories". His writings are characterized by a witty narration with surprising endings. They usually talk about ordinary people and take place in New York City. In "The last leaf" the author uses two central ideas: hope and selfless sacrifice‚ to show that a diseased mind is even more harmful than the disease itself
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“Mr. Pneumonia was not a chivalrous old gentleman. A mite of a woman with blood thinned by California zephyrs was hardly fair game for the old duffer.” This quote comes from a fictional short story called The Last Leaf by O. Henry. It tells the story of a woman‚ Johnsy‚ who is stricken with pneumonia and has chosen to let fate decide whether she will survive or not. The three things that stand out in this story are its conflicts‚ its suspense‚ and its theme. The conflicts within this story are
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Methyl Red and Voges-Proskauer Test The Methyl Red test shows which bacteria are creating stable acids through mixed acid fermentation of glucose. This helps to identify enteric bacteria by examining how they metabolise glucose. Every enteric bacteria first produces pyruvic acid from metabolism of glucose. A methyl red positive enteric bacteria‚ uses the mixed acid pathway when breaking down pyruvic acid to different acids‚ like lactic‚ acetic‚ and formic acids. The Voges-Proskauer test determines
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student-generated questions. Over the years‚ I have found the floating leaf disk assay technique to be reliable and understandable to students. Once the students are familiar with the technique they can readily design experiments to answer their own questions about photosynthesis. The biology behind the prodedure: Leaf disks float‚ normally. When the air spaces are infiltrated with solution the overall density of the leaf disk increases and the disk sinks. The infiltration solution includes
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Recent Breakthrough - “Artificial Leaf” In the past 3 million years‚ the levels of atmospheric carbon dioxide have been at their highest ever. With the more relatively recent beginning of the Industrial Age‚ the amount of clean‚ breathable air that humanity depends upon for survival‚ has‚ as a response to the Era‚ decreased. The increase in carbon emissions and the increasing dependence upon fossil-fuels for energy has led to a global race for the creation of a carbon-neutral‚ renewable energy
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The “Maple Leaf Rag” by Scott Joplin‚ is one of the most famous ragtime music known in modern times. The song is reminiscent of the last time I went to Disneyland‚ and is played commonly there by the pianists employed there having shows‚ which brings back good memories‚ therefore‚ making me biassed to say that it makes me feel happy and excited. Like ragtime is is known today‚ the tune is all solo piano‚ no vocals. The tune is upbeat and fast‚ and you can hear a lot of moving up and down the scale
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density of stomata in the upper and lower epidermis of a dicotyledonous leaf. Stomata are the principle means of gas exchange in plants. Stomata are small pores they are controlled by guard cells which control the opening and closing of stomata. Stomata allow carbon dioxide to enter the plant‚ and allow water and excess oxygen to escape. About 90% of water is lost from the leaf during transpiration. The number of stomata on leaf surface varies among different species. The lower epidermis tends to
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