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Specifications
- pH:3.7 ±0.1
- Description:YSG Agar
- Size:500 g
- Storage Temperature:+2…+8 °C
- Supplier No.:M1753-500G
Specifications
About this item
YSG agar recommended for the detection of Alicyclobacillus in fruit juices in accordance with official method of IFU.
- Appearance: Cream to yellow homogeneous free flowing powder
- Gelling: Firm, comparable with 1.8% agar gel
- Color and clarity of prepared medium: Pale yellow colored clear to slightly opalescent gel forms in petri plates
- Reaction: Reaction of 2.0% w/v aqueous solution at 25 °C
Alicyclobacillus species are gram positive aerobic thermophillic, and spore forming acidophilic bacteria. Alicyclobacillus are sometimes called acidophilic thermophillic bacteria (ATB). These spore forming organisms are able to survive the relatively mild pasteurization temperatures used for fruit juices and drinks and some are able to grow out and cause spoilage of the beverage. Even very low numbers of alicyclobacillus are able to cause spoilage and produce objectionable flavours and odors specially affecting the quality of fruit juice and in the beverages, damaging the brand. These bacteria are able to grow at pH values as low as 2.5 and also at elevated temperatures as high as 60 °C.
Yeast extract in the medium supplies vitamin and growth factors. Glucose serves as an energy source. Soluble starch neutralizes the medium. The low pH of the medium imparts selectivity to the medium. This medium is recommended for the count of Alicyclobacillus in fruit juices.
Supplier: VWR International
$377.44 to $992.90