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Adenosine

Adenosine is a nucleoside composed of a molecule of adenine attached to a ribose sugar molecule (ribofuranose) moiety via a beta-N9-glycosidic bond.It slows conduction time through the A-V node, can interrupt the reentry pathways through the A-V node, and can restore normal sinus rhythm in patients with paroxysmal supraventricular tachycardia (PSVT), including PSVT associated with Wolff-Parkinson-White Syndrome.

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Adipic Acid

Adipic acid is the most important dicarboxylic acid.It is mainly used as a precursor for the production of nylon. Adipic acid has been incorporated into controlled-release formulation matrix tablets to obtain pH-independent release for both weakly basic and weakly acidic drugs. It has also been incorporated into the polymeric coating of hydrophilic monolithic systems to modulate the intragel pH, resulting in zero-order release of a hydrophilic drug,in production of Plasticizes, poly-amides, Polyesters and herbicides in paint and varnish and textile industries.

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Aesculin

Aesculin is a glucoside that naturally occurs in the horse chestnut, California Buckeye and in daphnin. It is used in a microbiology laboratory to aid in the identification of bacterial species.

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Agarose

Agarose is a linear polymer with a molecular weight of about 120,000, consisting of alternating D-galactose and 3,6-anhydro-L-galactopyranose linked by α-(1→3) and β-(1→4) glycosidic bonds. An agarose is a polysaccharide polymer material, generally extracted from seaweed. Agarose is one of the two principal components of agar, and is purified from agar by removing agar's other component, agaropectin. Agarose is frequently used in molecular biology for the separation of large molecules, especially DNA, by electrophoresis. Agarose exhibits the phenomenon of thermal hysteresis in the liquid-to-gel transition. Agarose is a preferred matrix for work with proteins and nucleic acids as it has a broad range of physical, chemical and thermal stability, and its lower degree of chemical complexity also makes it less likely to interact with biomolecules. Agarose is most commonly used as the medium for analytical scale electrophoretic separation in agarose gel electrophoresis. Agarose gel electrophoresis is the routine method for resolving DNA in the laboratory. It can also be used to separate large protein, and it is the preferred matrix for the gel electrophoresis of particles with effective radii larger than 5-10 nm. Agarose gels are cast horizontally in a mold, and when set, usually run horizontally in a submarine mode in buffer. Agarose gel matrix is often used for protein purification, for example, in column-based preparative scale separation as in gel filtration chromatography, affinity chromatography and ion exchange chromatography.

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Albert Stain A Solution

Albert stain is used to demonstrate special structure in bacteria. It is mainly used to detect metachromatic granules that is commonly found in Corynebcterium diphtheria. Two reagents are used in the staining process, which are Albert A solution and Albert B solution.

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Alcian Blue

Alcian Blue is any member of a family of polyvalent basic dyes. It is used to stain acidic polysaccharides such as glycosaminoglycans in cartilages and other body structures, some types of mucopolysaccharides, sialylated glycocalyx of cells etc. Alcian Blue can be used to quantitate acidic glycans both in microspectrophotometric quantitation in solution or for staining glycoproteins in polyacrylamide gels or on western blots. It is a tetravalent basic (cationic) dye with a copper (Cu2+, coordination 4 of 6, orbital configuration d9 with Jahn-Teller distortion) phthalocyanine nucleus (CuPc) with three or four pendent isothiouronium side chains imparting its bulkiness and positive charges. In order to qualify as an alcian blue family member there has to be at least 2 side chains and the mixtures often have 3 chains in average to qualify as 8G. Alcian Blue has been used as an adhesive to help stick glycol methacrylate sections to glass slides. Alcian Blue has been used as a gelling agent for lubricating fluids likely due to the stacking properties of this macrocylic aromatic compound.

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Aliquat 336

Aliquat 336 is a pale yellow liquid, odor of ammonia with negligible solubility in water.It emits very toxic fumes when heated to decomposition.

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