Chemistry

MSA University, faculty of pharmacy, Bio chemistry department. Course code PB301 Nucleotides Student name: ID: Under supervision of DR: Teaching assistant Structure Nucleic acids are polymers consist of units called nucleotides. These mononucleotide units react together by intermolecular dehydration reactions that create phosphate ester bonds. Those reactions are either, catalyzed or specialized enzymes. The nucleotide units are created by smaller types of components. Each nucleotide…

Experiment #6: Polarimetry Resolution of (∓)-Racemate: (∓)-ɑ-Phenylethylamine OBJECTIVE All chiral molecules have a mirror image of themselves. While they have the same physical properties, they interact with other chiral molecules completely different. Since there are many chiral molecules in organics, this can lead to the need to make optically pure products. If the chemist does not, it can lead to many problems including death. In this experiment, the separation of two enantiomers was…

The periodic table is a very identifiable symbol in everything science. There is one hanging in almost every chemistry class. But, the one we know is not what it always was. Before our modern periodic table there was the periodic table that Dmitri Mendeleev constructed. There are many differences and similarities between the Modern Periodic Table and Mendeleev’s Periodic Table. Just for example, the modern periodic table arranges elements in order of increasing atomic number. Mendeleev’s ordered…

Physical science is the sciences concerned with the study of inanimate natural objects, including physics, chemistry, astronomy, and related subjects. The topics that we covered in the 2015/2016 science year are: atoms and elements; chemical bonding and reactions; energy; electricity and magnetism; waves; and forces. My project is a toy made of conductive ink and wired lights in which the user places their finger onto the ink as a conductor. The part of the toy that comes into play with Chelchi…

But, due to this process of trial and error and the search for the essential base and Philosophic Mercury required to create the Philosopher’s Stone, advancements and contributions to Wall 4 modern chemistry were made. For example, Johann Rudolph Glauber, a self-educated German alchemist, developed processes for the production of sulphuric, nitric, acetic, and hydrochloric acids (Flavell-While). Another contributor is Robert Boyle, who is best known…

The book, The Disappearing Spoon by Sam Kean explores each of the elements on the periodic table. The Disappearing Spoon focusses on the history of the Periodic Table by telling stories that show how each element affected the scientists that discovered it. For each element, Kean supplies an extensive backstory for its foundation, the common (or uncommon) uses of the element and other useful factoids about the matter. The author begins the novel with a physical description of the Periodic Table…

compound and compare the two compounds. We found out our compound was ionic because the compound dissolved in water, but not in toluene or acetone by using a solubility test, results on Table 1 of the group lab report. On page 59 of the Cooperative Chemistry Laboratory Manual is a chart on suggested liquids and the inference if the compound is soluble [1]. When then checked the pH of the solution by using pH strip. The solution had a pH>7. Then we did an anion test and discovered the compound…

Pure Copper Iodide were synthesised and the mass percentage of Copper in purified Copper (I) Iodide sample were determined by applying Beer’s Law in UV-Vis spectroscopy. Absorbance value of Cu-cuprizone solution was measured. Using the absorbance value of 0.3576 , the concentration of the Cu-cuprizone solution were obtained at 0.001389g/L with reference to the graph of the standard solution A to D. The graph of absorbance against concentration of the standard solution A to D shows a linear…

melting point range of 88.9 oC- 91.9 oC. Procedure: We followed the instructions making no changes or deviations. Reference: Poulos, Z.J. " The Separation of Three Organic Compounds by Acid-Base Reactions and Liquid-Liquid Extractions" Organic Chemistry I, A Laboratory Manual for the Health Science Major; Hayden-McNeil: Plymouth, MI, 2016. 111-121.…

Scheme 11: Synthesis of 3h & 3i from 2a-i. Compounds: 3h : 7-Hydroxy-3-(4-methoxybenzyl)chromanone(Dihydrobonducelin) R1=OH, R2=R3=H,R4=OCH3 3i : 7-Hydroxy-3-(2,4-dimethoxybenzyl)chromanone (2’-Methoxydihydrobonducellin) R1=OH,R3=H,R2=R4=OCH3 Antioxidant activity of above synthesized derivatives were studied, on that basis 3-benzylchromones with phenolic hydroxyl group (2h & 2i) showed highest activity than com-pound with methoxyl group (2e & 2g) because double bond between C2-C3 done major…