Biochemistry

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Monsanto

1. De Ruiter Seeds
2. G. D. Searle & Company
3. Pharmacia & Upjohn
4. Seminis
5. Solutia

updated 2010-07-17 16:02:17

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Biogenesis

updated 2010-07-16 23:16:39

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Serotonin

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updated 2010-07-17 21:30:13

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pH

pH is a term used in chemistry to describe the relative acidity or basicity of an aqueous solution. It is a number that approximates the negative logarithm of the concentration of hydrogen ions (H+) present, and ranges between 0 and 14. Pure water (H20) is neutral at a pH of 7 and may be considered either a very weak acid or base. A logarithmic scale means a ten-fold difference between successive numbers. Acidic solutions are have a number less than 7 and basic solutions have a number greater than seven. To raise the pH of an aqueous solution, a base must be added, and to lower the pH, an acid must be added.http://ecorestoration.montana.edu/mineland/guide/analytical/chemical/water/acidity.htm

The pH of a solution may be tested in numerous ways; one of the most common is to take a sample and use a Universal Indicator testing kit or test strips like ones used for swimming pools and aquariums. For more exact measurements, there are sophisticated meters that can be expensive and require frequent calibration but are much more accurate. These meters are very helpful for fish breeders and hydroponic growers as pH has a direct effect on living systems. Maintaining pH in a strict range is essential for maximum health and vitality, since different elements necessary for photosynthesis and respiration are mobilized within different pH ranges.http://faculty.clintoncc.suny.edu/faculty/michael.gregory/files/bio%20101/bio%20101%20laboratory/photosynthesis/photosynthesis.htm

Human blood ...

updated 2010-09-14 01:27:39

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Tryptophan

The content in this page is not a substitute for professional medical advice. Contact your doctor for more information on tryptophan.

updated 2010-07-18 01:08:42

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Polysaccharide

Polysaccharides are also known a glycans. Linkage between the units of a polysaccharide are known as glycosidic bonds and there are several types of glycosidic linkages. The general chemical formula for polysaccharides is C,,x,,(H,,2,,O),,y,,. Polysaccharides do not have a sweet taste, dissolve in water or form crystals when dried. Pure polysaccharides form white powders. As alluded to above, polysaccharides have several functions such as providing structure (chitin, cellulose and peptidoglycan) and as a source of glucose (starches in plants and glycogen in animals). For humans and animals, cellulose from plants serves as a dietary fiber known as insoluble fiber. Soluble dietary fiber comes from classes of polysaccharides known as hemicelluloses, pectic substances, and gums. http://www.fao.org/agris/search/display.do?f=./1989/v1507/US8845398.xml;US8845398 http://www.biology-online.org/dictionary/Polysaccharide http://www.rpi.edu/dept/bcbp/molbiochem/MBWeb/mb1/part2/sugar.htm http://faculty.clintoncc.suny.edu/faculty/michael.gregory/files/bio%20101/bio%20101%20lectures/biochemistry/biochemi.htm

updated 2010-07-17 19:06:25

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