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Chemistry

We found 83 free essay samples on Chemistry for you

Isolation of Keratinase Producing Marine Actinobacteria

Keratinase is a extracellular proteolytic inducible enzyme with the capability of degrading insoluble keratin substrates. The aim of this study was to isolate keratinase producing marine actinobacteria. The sample was collected from marine sediment of rameshwaram coast, and subjected to isolation of actinobacteria on ISP7 medium. The obtained two isolates were inoculated on skimmed milk…

Chemistry,

Scientific Method,

Study

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Pages: 5
Words: 1170

Arsenic

Arsenic is obviously an extremely poisonous element; however, some people have found arsenic to have a restorative effect on them. Chemically, arsenic is a metalloid. Two common forms of arsenic are gray and yellow. (see Figure 1-A) Element 33 has an atomic weight of 74.9216 and the chemical symbol of As. It boils at 613C,…

Chemistry,

Genetics,

Science

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Pages: 7
Words: 1731

Calorimeter

A team was sent to the chemical manufacturing division of a small chemical company to help the technicians with experiments. Since the notes written by the technicians were inaccurate and unfinished, all of the experiments they had preformed needed to redone and documented correctly. The head of the company gave the new team the task…

Chemistry,

Technology

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Pages: 11
Words: 2551

Fire Retardant: What Is It, Where Is It Used?

Flame retardants are generally classified according to their chemical makeup. The most common classes of flame retardants are: Brominated Brominated compounds are used for a number of purposes, but the major use is as flame retardants. Bromine interacts with the fire cycle in the gas phase to stop the chemical chain reaction that leads to…

Chemistry,

Science,

Scientific Method,

Technology

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Pages: 2
Words: 440

Salivary amylase

The enzyme amylase will catalyze the hydrolysis of starch to maltose when the pH is near 7.0. But when the HCl is added to the solution the amylase will be denatured which results in the enzyme being deactivated. The iodine serves as an indicator for the presence of starch. Iodine (I2) will reach with iodide…

Chemistry,

Time

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Pages: 2
Words: 310

Cobalt

My report is about the element Cobalt. Cobalt is the 27th element on the periodical table and has an atomic number of twenty-seven. It has a symbol of Co. Cobalts atomic weight is 58.9332. It has a melting point of 1,490 and a boiling point of 2,900 C. Cobalt looks almost exactly like iron and…

Chemistry,

Science,

Study

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Pages: 2
Words: 332

Steam Distillation to Purify Heat Sensitive, Natural Products, Like Essential Oils

In this experiment, the process of steam distillation was used to purify a natural product, (the essential oil of spearmint). This phenomenon works because when two immiscible liquids are distilled, the boiling point of the mixture is below the boiling point of the both pure compounds. Since water has a significantly lower boiling point than…

Chemistry,

Nature,

Science

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Pages: 2
Words: 311

Melvin Calvin Is an American Biochemist

Melvin Calvin was born in St. Paul, Minnesota, April 8, 1911, of Russian emigrant parents. He received the B.S. degree in Chemistry in 1931 at the Michigan College of Mining and Technology, and the Ph.D. degree in Chemistry from the University of Minnesota in 1935. He spent the academic years 1935-1937 at the University of…

Chemistry,

Education,

Science

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Pages: 2
Words: 289

Oxygen

Oxygen, symbol O, colorless, odorless, tasteless, slightly magnetic gaseous element. On earth, oxygen is more abundant than any other element. Oxygen was discovered in 1774 by the British chemist Joseph Priestley and, independently, by the Swedish chemist Carl Wilhelm Scheele; it was shown to be an elemental gas by the French chemist Antoine Laurent Lavoisier…

Chemistry,

Science,

Study

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Pages: 3
Words: 749

A metal called a magnet

Normally magnesium is covered with a layer of oxide, MgO, that protects magnesium from air and water. Magnesium is an important element for plant and animal life. Chlorophylls depend greatly on it.Sir Humphrey Davy discovered magnesium in 1775 at England. It was dicovered when he evaporated magnesium amalgam by mixing a moist magnesia and mercuric…

Chemistry,

Mathematics,

Nature,

Physics,

Science

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Pages: 2
Words: 478
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