BiocheminsiderOverview Tungsten also referred to as wolfram is a chemical element with the symbol W and atomic number 74. Natural tungsten contains five stable isotopes and 21 other unstable isotopes. The name Tungsten comes from the former Swedish name for the tungstate mineral scheelite, tungsten which means heavy stone. Pure tungsten is a silver-white metal … Read more
Benzoic Acid Benzoic acid is an organic compound with the chemical formula C6H5CO2H. It is a solid that is crystalline in appearance, similar to white needles. A natural source of benzoic acid is gum benzoin, which comes from certain tree barks. However, benzoic acid can be synthesized by chemical means. Benzoic acid is an organic … Read more
What Is Solubility? Solubility is the property of a solid, liquid or gaseous substance referred to as the solute, to dissolve in a solvent (usually a liquid) and form a solution. Solubility indicates the upper concentration a compound reaches in a solution. Therefore, the relation between the solute and solvent is very important in determining … Read more
Overview Palladium is a chemical element with the symbol Pd and atomic number 46. It is a rare and lustrous silvery-white metal in appearance. In the periodic table, palladium is located in group 10, period 5, d-block. The periodic table is a chart that shows how chemical elements are related to each other. Palladium, ruthenium, … Read more
Overview Cobalt is a hard ferromagnetic, silver-white, hard, lustrous, brittle element. It is a member of group VIII of the periodic table and is located between iron and nickel and shares many chemical and physical properties with these two elements. Cobalt is found in the Earth’s crust only in a chemically combined form. Cobalt … Read more
Overview Potassium sulfide is an inorganic salt that is not found as an isolated compound in nature. It always found as a mixture with potassium hydrosulfide. It is a colorless crystal with a typical sulfur smell. Potassium sulfide can be prepared through the reaction of pure carbon with potassium sulfate at high temperatures. Potassium sulfide … Read more
Gas chromatography is the most widely used form of chromatography in analytical chemistry for separating and analyzing compounds that can be vaporized without decomposition. Gas chromatography is used to separate complex mixtures of different molecules based on their physical properties such as polarity and boiling point. The other uses of gas chromatography include: Testing purity … Read more
Overview Polyphosphoric acid (H3PO4) is a colorless, odorless and highly viscous liquid compound with strong hydroscopic properties. It is a mixture of linear phosphoric acids and orthophosphoric acid. Phosphoric acids with less than 95% H3PO4 (68% P2O5) contain the simple orthophosphoric acid. However, at higher concentrations, the acid consists of a mixture of ortho, pyro, … Read more
By Prof Walter Jaoko Introduction What Is Mannitol Salt Agar? Mannitol salt agar or MSA is a commonly used selective and differential growth medium in microbiology. It encourages the growth of a group of certain bacteria while inhibiting the growth of others. This medium is important in medical laboratories as one method of distinguishing pathogenic microbes in a short period of time. It contains a … Read more