D-(+)-Mannose is a sugar monomer of the aldohexose series of carbohydrates. It is a C-2 epimer of glucose. Appearance: White to off-white crystals or powder Solubility: Clear colorless solution at 5g in 100ml of water Specific rotation: +13.50° to +15.00° (c = 4% in water at 20°C) Assay…

Dextrose Salt Agar is prepared according to the standard formula 31 of the International Dairy Federation (1). It is used for enumeration of yeasts and molds in butter and other dairy products (2, 3). Yeast extract and dextrose provide growth nutrients. A 2.5 gm sample of chilled butter is…

Fast blue B is used for the determination of acetylcholinesterase activity. Acetylcholinesterase converts 1-naphthyl acetate to 1-naphthol, which reacts with fast blue B to form a purple-colored diazonium dye. Similarly, fast blue B is also used for a- and ß-glucosidase activity. Application: Fast…

Broth used for presumtive identification of coliforms from variety of specimens such as water, milk and food etc.