Description
General description
GranuCult® plus Letheen-Broth Base modified is highly nutritious containing Lecithin and Tween® 80 for neutralizing quaternary ammonium compounds. Beef extract and tryptone provide nitrogen, carbon, sulfur, and other essential growth factors. Glucose is the source of energy. These media are modifications of the AOAC formulae. Letheen Broth Base is used for determining the phenol coefficient of quaternary compounds.
Application
GranuCult® plus Letheen-Broth Base modified is a unique formulation for determining the bacterial activity of quaternary ammonium compounds.
Features and Benefits
GranuCult® offers superior granulated culture media
Safe and sustainable due to reduced risks associated with fine dust and toxic substance inhalation, resulting in a safer work environment
Excellent wettability, solubility, and free-lowing properties
Convenient, with minimal component separation and clumping, even under warm or humid conditions
High batch-to-batch reproducibility
Prolonged shelf life of up to five years
High number of test strains exceeding all regulatory demands
Granulation technology allows many supplements to be included, with no need to add these separately
Analysis Note
Appearance (clearness): turbid
Appearance (colour): brown
pH-value (25 °C): 7.0 - 7.4
Inoculum on reference medium (Enterococcus faecalis ATCC 29212 (WDCM 00087)): ≤ 100
Inoculum on reference medium (Escherichia coli ATCC 25922 (WDCM 00013)): ≤ 100
Inoculum on reference medium (Pseudomonas aeruginosa ATCC 27853 (WDCM 00025)): ≤ 100
Inoculum on reference medium (Staphylococcus aureus ATCC 25923 (WDCM 00034)): ≤ 100
Inoculum on reference medium (Staphylococcus epidermidis ATCC 12228 (WDCM 00036)): ≤ 100
Inoculum on reference medium (Salmonella typhimurium ATCC 14028 (WDCM 00031)): ≤ 100
Growth (Enterococcus faecalis ATCC 29212 (WDCM 00087)): good to very good
Growth (Escherichia coli ATCC 25922 (WDCM 00013)): good to very good
Growth (Pseudomonas aeruginosa ATCC 27853 (WDCM 00025)): good to very good
Growth (Staphylococcus aureus ATCC 25923 (WDCM 00034)): good to very good
Growth (Staphylococcus epidermidis ATCC 12228 (WDCM 00036)): good to very good
Growth (Salmonella typhimurium ATCC 14028 (WDCM 00031)): good to very good
Incubation: 24 to 48 hrs.; 35 °C; aerobic.
Legal Information
GRANUCULT is a registered trademark of Merck KGaA, Darmstadt, Germany
NutriSelect is a registered trademark of Merck KGaA, Darmstadt, Germany
TWEEN is a registered trademark of Croda International PLC
Disclaimer
We offer two media types: the superior granulated GranuCult® and the cost-efficient powdered NutriSelect® culture media, depending on your needs. The designations basic, plus, or prime are added to indicate the quality control level, from basic quality control to standard QC plus to prime for full regulatory compliance.
