Anthraquinone Essays

The anthraquinone dye experiment has the purpose to identify the anthraquinone dyes from unknown mixture by using thin layer chromatography (TLC) of the unknown fraction. An anthraquinone is an aromatic organic compound obtained by the oxidation of anthracene. To separate the compounds in the mixture, column chromatography and thin layer chromatography uses portioning of a sample between a stationary solid phase and a liquid mobile phase. As the stationary phase, they use either silica gel or alumina

Plants have been used as botanical medications for years before history was even recorded. A prime example is the Chinese Rhubarb, which was also known as Rheum officinale. Rhubarb is one of the most widely used herbs in Chinese medicine. The Chinese rhubarb originated and is native to the mountains and plateaus of China and Tibet. The rhubarb is a hardy species which can be found as weeds in people’s gardens and on the side of the road as well. This rhubarb is not the same as the one we’re familiar

Traditional restorative dentistry propagated early operative intervention to remove diseased tissue and bacteria. Modern dentistry, however, emphasises on arresting the caries progression and restoring the tooth with minimum tissue destruction. Minimal invasive dentistry is based on this axiom. A drawback in restorative dentistry is the occurrence of secondary caries[18,19] that has compelled us to practice a more extensive form in the past. MID also displays the same drawback. Our study, in accordance

Protocol for Initial TLC: A TLC chamber and a TLC plate were obtained making sure to wear gloves and to not damage the silica coating on the TLC plate. A line was drawn about 1 cm above the bottom of the plate using a pencil. The TLC plate was spotted with the unknown by adding a small drop to the plate with a capillary tube and then allowing the solvent to evaporate. The TLC chamber was prepared by adding enough methylene chloride to cover the bottom of the jar to about 0.5 cm depth. A piece of

DYEING Dyes are coloring materials used in dyeing textiles. Other hand it can be defined as a substance which may be natural or synthetic use to change or add color to the textile materials. They are incorporated into the fiber by chemical reaction, absorption, or dispersion. Dyes differ in their resistance to sunlight, perspiration, washing, gas, alkalizes, and other agents; their affinity for different fibers; their reaction to cleaning agents and methods; and their solubility and method of application

1.1 Kinetic model To determine the second order reaction rate constant of Acesulfame K with the different transient species studied, two pairs of independent competition kinetics were established for each transient: Acesulfame K with Ibuprofen and Acesulfame K with Atrazine. Assuming the first pair of competition for the hydroxyl radical generated by NaNO3 irradiation is Acesulfame and Ibuprofen (ACE, IBP). Their respective reaction rates are (M s-1): (Eq. 6) (Eq. 7) With