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HCM116 Slanetz and Bartley Medium
Product Info
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Product Info
Introduction
Intended Use
For the enumeration of enterococci in water and other liquids by the membrane filtration technique.
Principle and Interpretation
The growth of the entire accompanying Gram-negative microbial flora is inhibited by sodium azide. Enterococci reduce 2,3,5-Triphenyl tetrazolium chloride (TTC) to give a red formazan inside the bacterial cell, their colonies are thus red. Nitrogen, minerals, and amino acids are provided by the tryptose whilst yeast extract supplies vitamins. Glucose acts as the carbon source, dipotassium phosphate buffers the medium, and agar-agar is the solidifying agent.
Formulation
Ingredients
/liter
Tryptose
20.0g
Yeast extract
5.0g
Glucose
2.0g
Disodium hydrogen phosphate
4.0g
Sodium azide
0.4g
2,3,5-Triphenyl Tetrazolium chloride
0.1g
Agar
10.0g
pH 7.2±0.1 at 25°C
Preparation
Dissolve 41.5 g in 1 L of purified water. Heat in boiling water and agitate frequently until completely dissolved. Sterilize by further heat for 20 minutes in the boiling water bath.
Quality Control
Cultural characteristics observed after incubation at 34-38°C for 40-48hours
Quality control strains
Growth
Colony color
Enterococcus faecalis ATCC29212
Good growth,PR≥0.5
deep red coloured colonies
Escherichia coli ATCC25922
Total inhibition
–
Sorage and Shelf Life
Keep container tightly closed, store in a cool, dry place, away from bright light. Storage period of 3 years.
Precautions
1. When weighing the dehydrated medium, please wear masks to avoid causing respiratory system discomfort
2. Keep container tightly closed after using to prevent clumping.
Waste Disposal
Microbiological contamination was disposed by autoclaving at 121°C for 30 minutes.
Document
Intended Use For the enumeration of enterococci in water and other liquids by the membrane filtration technique. Principle and Interpretation The growth of the entire accompanying Gram-neg……
bis-PEG2-endo-BCN is a click chemistry reagent, The BCN group enable copper free click chemitry with azide-tagged molecules. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.
Document
bis-PEG2-endo-BCN is a click chemistry reagent, The BCN group enable copper free click chemitry with azide-tagged molecules. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.
