Sulfa Drugs: Preparation of Sulfanilamide Introduction The purpose of this experiment is to prepare sulfanilamide from p-Acetamidobenzenesulfonyl chloride. This will be done using reflux‚ vacuum filtration‚ and melting point determination. Experiment Scheme6 Figure 1. Reaction equation.6 A hot water bath was prepared in a fume hood using a 250-mL beaker. 2.5 g of p-acetamidobenzenesulfonyl chloride was placed into a 50 mL Erlenmeyer flask and 11 mL of dilute ammonium hydroxide solution
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common environments in which to study thermodynamics include general air or an inert gas such as nitrogen or helium. This allows the least impact on the results of heat transfer and other elements within the study. The thermal analysis of polymers is one of the largest areas of research within the field. This comes in the form of both raw materials as well as everyday packaging and household products. Raw materials can be studied with the addition of various elements such as dyes and stabilizers
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applied for a German patent‚ proposing the idea of preservin animal and vegetable tissues permanently by synthetic resin impregnation. Since then‚ Von Hagens applied for further US patents regarding the work on preserving biological tissues with polymers. With the success of his patents‚ Von Hagens went on to form the Institute for Plastination in Heildelberg‚ German in 1993. The institute made their first showing of plastinated bodies in Japan in 1995‚ which drew more than three million visitors
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Chemistry and cosmetics Cosmetics have been around since almost the beginning of time. Egyptian women used kohl to darken their eyelids‚ Cleopatra was even said to have bathed in milk to achieve a soft smooth completion. In Greece‚ women used lead carbonate (a white powder) to obtain a pale complexion‚ which probably wasn’t worth it seeing how it cost them their lives! Anyway‚ cosmetics are no modern phenomenon! Today it is a big business‚ making about $12 billion
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cost and with greater accuracy. Relative humidity was once determined by measuring the change in moisture absorption in silk‚ human hair‚ and later‚ nylon and synthetics. Mechanical methods for measuring RH were introduced in the 1940s. Recently‚ polymer-based resistive and capacitive sensors have been developed Sensor Types and Technologies Recent developments in semiconductor technology have made possible humidity sensors that are highly accurate‚ durable‚ and cost effective. The most common
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organic compounds are carbohydrates‚ lipids‚ proteins‚ and nucleic acids. These are monomers and they link together into long chains that form polymers. Different reagents can be used to find the presence of these macromolecules. Proteins are made of carbon‚ hydrogen‚ oxygen‚ nitrogen‚ and sometimes sulfur. Proteins are covalently bonded in chains as polymers of amino acids. These bonds are called peptide bonds. Amino acids linked together form a polypeptide called a protein. Some proteins are
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primary compose colloidal dispersion of polymer particles in a liquid. Latex uses rubber particles‚ which compose the bladder. The rubber particles are known to be natural rubber. Natural rubber is made from polymer isoprene‚ also known as 2-methylbuta-1‚ 3-diene with the chemical formula (C5H8)n. Butyl valves are in most soccer balls and are used for air retention. These valves are made from silicone. Silicon atoms are tetravalent‚ meaning silicones are polymers built from inorganic-organic
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Water Treatment Plant Process- Chlorination or Ultraviolet Radiation By Shreya Shah Surface waters necessitate water treatment before consumption to guarantee no health risk is present to the user. Poor quality water which consists of dissolved and suspended particles‚ can impact and cause health risks to consumers. The most important contamination is the microbiological contamination as it leads to infectious diseases (Water Treatment‚ 1994). Chemicals such as nitrates and cyanide when contaminate
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Indian Guar Gum Market ▪ India has been a major player in the context of guar and guar gum in the global market. ▪ India’s production contributes to 80% of the world’s total production figuring up to 6 lakh tons. ▪ Rajasthan wholly retains the credit for India’s position producing 70% of the production itself. ▪ Guar is largely consumed as a vegetable in the Indian subcontinent. It is also used in making pickles. ▪ 25000 tons of the total production in the country constitutes
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OPTION: BIODEGRADABLE Plastics Biodegradable plastic is plastic that has been treated to be easily broken down by microorganisms and return to nature. Many technologies exist today that allow for such treatment. Currently there are some synthetic polymers that can be broken down by microorganisms such as polycaprolactone‚ others are polyesters and aromatic-aliphatic esters‚ due to their ester bonds being susceptible to attack by water. Some examples of these are the natural poly-3-hydroxybutyrate
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