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A water-soluble mixture of proteoses and amino acids derived from albumin, meat, or milk; used as a nutrient and to prepare nutrient media for bacteriology.



a product formed by the partial hydrolysis of proteins and consisting chiefly of a mixture of various polypeptides and also containing dipeptides, tripeptides, and free amino acids. Peptones are formed by the action of proteolytic enzymes in gastric and pancreatic juices (pepsin, trypsin) on proteins or by careful hydrolysis of proteins in acid or alkaline solutions. The composition and name of a peptone depend on the type of protein from which the peptone is derived. Thus, there are meat peptones, fish peptones egg peptones, and others. Peptones are used in microbiology for the preparation of nutrient media.

References in periodicals archive ?
An evaluation of alkaline peptone water for enrichment of Vibrio cholerae in feces.
The immediately adjacent underlying tissues of treated and untreated tomatoes were individually homogenized in sterile peptone water at pH 7.
1% peptone water and incubated at 37[degrees]C for 24 hours.
Apart from screening for STEC, the stool samples were also inoculated into Selenite F broth (SFB) and alkaline peptone water (APW) enrichment broths.
For dry foods and environmentals, Buffered Peptone Water is recommended to reconstitute and equilibrate samples prior to adding mTSB-n.
For microbiological analysis, 25 g casing soil samples were combined with 225 mL Buffered Peptone Water (BPW, Difco) in 500 mL glass beakers (VWR).
1% peptone water were prepared, and duplicated 1-mL samples at appropriate dilution ratio were poured on all-purpose and selective agar plates.
Twenty five grams of each of food samples were weighted under complete aseptic condition in sterile flask (500 ml) and mixed with 225 ml of Buffer peptone water broth (pre-enrichment medium).
Following the launch of [mu]PREP[TM] Buffered Peptone Water ISO (BPW), the first in Lab M's new line of bagged, ready-to-reconstitute microbiological culture media, the company has published a video that demonstrates the speed and simplicity of [mu]PREP[TM] media preparation.
4)), then 1 mL of the 1:10 dilution was added to 10 mL alkaline peptone water (1% peptone (BD Difco), 1% NaCl (Fisher Scientific, Waltham, MA), pH 8.
10% sterile peptone water was rubbed over the surface of the fish on the area covered by the wire swab guide.