"Carbon Group" (40 results)

Slanetz-Bartley Medium is a very selective medium for enterococci. A demonstration by Burkwall and Hartman showed that the addition of .5ml of Tween 80, and 20ml of a 10% Sodium Carbonate or Bicarbonate solution to each litre of the medium was valuable to investigating enterococci in frozen foods. Tryptose provides nitrogen, vitamins, minerals, and amino acids that essential for growth and the yeast extract is a source of vitamins of the B-group. Glucose is the fermentable carbohydrate providing carbon and energy and dipotassium phosphate is used as a buffer. Sodium azide inhibits Gram-negative bacteria triphenyl tetrazolium chloride is reduced to formazan by the enterococci. Bacteriological agar is the solidifying agent. It is prepared according to ISO 7899-2.

This medium also complies with the recommendations of the British Ministry of Health – Report 71, and the German DIN Regulations 10181 and 10160 for the examination of milk, meat, and meat products.

Slanetz-Bartley Medium is a very selective medium for enterococci. A demonstration by Burkwall and Hartman showed that the addition of .5ml of Tween 80, and 20ml of a 10% Sodium Carbonate or Bicarbonate solution to each litre of the medium was valuable to investigating enterococci in frozen foods. Tryptose provides nitrogen, vitamins, minerals, and amino acids that essential for growth and the yeast extract is a source of vitamins of the B-group. Glucose is the fermentable carbohydrate providing carbon and energy and dipotassium phosphate is used as a buffer. Sodium azide inhibits Gram-negative bacteria triphenyl tetrazolium chloride is reduced to formazan by the enterococci. Bacteriological agar is the solidifying agent. It is prepared according to ISO 7899-2.

This medium also complies with the recommendations of the British Ministry of Health – Report 71, and the German DIN Regulations 10181 and 10160 for the examination of milk, meat, and meat products.

HC Agar Base used with Tween 80 (Polysorbate 80) is used for the enumeration of moulds in cosmetics. The formulation of HC Agar decreased incubation time to 3 days at 27.5 ± 0.5 ºC. The formulation of HC Agar Base is supplemented with Tween 80 (Polysorbate 80) to prepare HC Agar.

Dextrose is the fermentable carbohydrate providing carbon and energy. Yeast extract is source of vitamins, particularly the B-group essential for bacterial growth. Peptones provide nitrogen, vitamins, minerals, and amino acids essential for growth. Magnesium sulphate is a magnesium ion required in a big variation of enzymatic reactions, including DNA replication. The phosphates buffer the pH near neutrality. Ammonium Chloride provides essential ions. Sodium carbonate inactivates low levels of preservatives that are active at at acidic pH. Chloramphenicol inhibits bacteria, including Pseudomonas aeruginosa and Serratia marcenses, potential contaminats of cosmetics products. Tween 80 (Polysorbate 80) is incorporated to neutralize phenols, hexachlorophene, formalin that may be present in residual amounts from products. Agar is the solidifying agent.

Standard Methods Agar (PCA) is recommended for the counting of bacteria of sanitary interest, which are indicators of contamination or microbial load in foods. Enzymatic Digest of Casein provides nitrogen, vitamins, minerals, and amino acids essential for growth. Yeast extract is source of vitamins, particularly the B-group. Dextrose is the fermentable carbohydrate providing carbon and energy. Bacteriological agar is the solidifying agent. This medium is recommended by ISO 4833 for the colony count technique of microorganisms at 30ºC in the food chain.

TTC Chapman Agar (Lactose Agar TTC with Tergitol 7) 5kgis a selective and differential medium used for the presumptive control of E. coli and coliforms in waters for human consumption by the membrane filtration technique. Peptone and beef extract provide nitrogen, vitamins, minerals, and amino acids essential for growth. Yeast extract is source of vitamins, particularly the B-group. Lactose is a fermentable carbohydrate providing carbon and energy. Sodium heptadecyl sulphate (Tergitol 7) and TTC inhibit most Gram-positive bacteria. Bromothymol blue is a pH indicator and bacteriological agar is the solidifying agent.

TTC Chapman Agar (Lactose Agar TTC with Tergitol 7) 500gis a selective and differential medium used for the presumptive control of E. coli and coliforms in waters for human consumption by the membrane filtration technique. Peptone and beef extract provide nitrogen, vitamins, minerals, and amino acids essential for growth. Yeast extract is source of vitamins, particularly the B-group. Lactose is a fermentable carbohydrate providing carbon and energy. Sodium heptadecyl sulphate (Tergitol 7) and TTC inhibit most Gram-positive bacteria. Bromothymol blue is a pH indicator and bacteriological agar is the solidifying agent.

Glucose Chloramphenicol Agar is recommended by the International Dairy Federation (FIL-IDF) for the isolation and enumeration of yeasts and moulds in milk and dairy products. Yeast extract is the water-soluble portion of hydrolysed yeast and is a source of vitamins, particularly of the B-group, and other growth nutrients that stimulate yeast and mould development. Glucose is the fermentable carbohydrate as a carbon and energy source. Chloramphenicol is an antibiotic that helps in isolating pathogenic fungi from heavily contaminated material, as it inhibits most contaminating bacteria. It is a recommended antibiotic for use with media due to its heat stability and wide bacterial spectrum. Bacteriological agar is the solidifying agent.

WL Nutrient Agar, based on the Green and Grey formulation, is used for the control of industrial fermentations, particularly the manufacturing of beer. With a pH of 5.5, true counts of beer yeasts can be made and with a pH of 6.5, the medium is ideal for bakery and distilled spirit yeasts. Tryptone provides nitrogen, vitamins, minerals, and amino acids essential for growth. Dextrose is the fermentable carbohydrate providing carbon and energy. Yeast extract is a source of vitamins, particularly of the B-group and monopotassium phosphate is the buffer. Potassium, Calcium and Ferric chlorides all provide essential ions for the osmotic balance. Magnesium and Manganese sulphates are sources of divalent cations. Bromocresol green is the pH indicator and bacteriological agar is the solidifying agent.

BCP Agar is a non-inhibitory medium used for the detection and isolation of coliforms and in differential studies based on lactose fermentation. BCP stands for bromocresol purple. Peptone mixture and beef extract provide nitrogen, vitamins, minerals, and amino acids essential for growth. Lactose is the fermentable carbohydrate providing carbon and energy. Bromocresol purple is a pH indicator and bacteriological agar is the solidifying agent.

All coliforms ferment lactose with acid and gas production. This group includes the genera Escherichia, Enterobacter, Citrobacter, and Klebsiella. When lactose is fermented it produces acid that changes the colour of the medium from blue purple (alkaline) to yellow (acid). Blue colonies are lactose-negative and yellow colonies are lactose-positive.

Rogosa SL Agar is used for the isolation, enumeration, and identification of lactobacilli in oral bacteriology, faeces, vaginal specimens, and foodstuffs. This selective medium has been modified by Rogosa to contain high levels of sodium acetate and ammonium citrate at a low pH. This inhibits most microorganisms, including streptococci and moulds and limits swarming but allows the growth of lactobacilli. Sucrose, arabinose, and dextrose are fermentable carbohydrates as carbon and energy sources. Tryptone provides nitrogen, vitamins, minerals, and amino acids essential for growth. Yeast extract is a source of vitamins, particularly of the B-group. Sulphate salts provide inorganic ions. Polysorbate 80 is a surfactant and is incorporated to neutralize phenols, hexachlorophene, and formalin. Monopotassium phosphate acts as a buffer system. Bacteriological agar is the solidifying agent.

Yeast Extract Soy Agar is used for the selective isolation of dermatophytes and other pathogenic fungi in clinical samples. This medium is the preferred method as the use of antibiotics for suppressing bacteria results in a better recovery of fungal cells, which are sensitive to an acid environment. Yeast Extract Soy Agar is a modification of Sabouraud Medium and was formulated by Carmichael and Claus for the selective isolation of Trychophyton verrucossum as well as other fungi associated with contagious diseases. It contains streptomycin and chloramphenicol, antibiotics that inhibit bacterial growth but allow for the detection of pathogenic fungi. Soy peptone provides nitrogen, vitamins, minerals, and amino acids essential for growth. Yeast extract is a source of vitamins, particularly of the B-group. Dextrose is the fermentable carbohydrate providing carbon and energy. Bacteriological agar is the solidifying agent.