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as a source of carbon which important for bacterial growth

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5mo ago

Glycerol is added to cetrimide agar as a carbon source to support the growth of Pseudomonas aeruginosa, a bacterium that uses glycerol as a substrate. Additionally, glycerol helps maintain the pH of the medium, ensuring optimal conditions for bacterial growth while inhibiting the growth of other organisms.

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Q: Why glycerol is added in cetrimide agar?
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Is cetrimide cream lipid soluble?

Yes, cetrimide cream is lipid soluble. Cetrimide, the active ingredient in the cream, is a quaternary ammonium compound that has surfactant properties and can dissolve in lipids. This property allows cetrimide cream to effectively penetrate the lipid-rich outer layer of the skin for various skin conditions.


Isolation media for actinomycetes?

Isolation media for actinomycetes typically contain nutrients like starch, casein, and soybean meal as carbon and nitrogen sources. Common isolation media include starch-casein agar, glycerol-asparagine agar, and oatmeal agar. Selective antibiotics like cycloheximide and nystatin may be added to inhibit the growth of other bacteria.


Why is agar added to nutrient media?

Agar is added to nutrient media as a solidifying agent. It provides a solid surface for bacterial or fungal growth to occur and can be easily sterilized. Agar also allows for the isolation and enumeration of colonies for microbiological analysis.


Is broth has agar?

Agar is a type of gelatinous substance obtained from seaweed, used as a culture medium in laboratories and as a thickening agent in food. Broth typically does not contain agar unless specifically added to it as a thickener.


Why is glycerol and blue dye added to the gel loading buffer during gel electrophoresis?

Glycerol is added to make the DNA sample denser so that it sinks into the gel and loads properly. Blue dye is added to visualize the sample loading and migration progress during electrophoresis.

Related questions

What is glycerol yeast agar?

Glycerol yeast agar is a growth medium used in microbiology to culture and study fungi. It contains glycerol as a carbon source and yeast extract as a nutrient source for fungal growth. This agar is versatile and supports the growth of various fungal species.


Is cetrimide cream lipid soluble?

Yes, cetrimide cream is lipid soluble. Cetrimide, the active ingredient in the cream, is a quaternary ammonium compound that has surfactant properties and can dissolve in lipids. This property allows cetrimide cream to effectively penetrate the lipid-rich outer layer of the skin for various skin conditions.


Isolation media for actinomycetes?

Isolation media for actinomycetes typically contain nutrients like starch, casein, and soybean meal as carbon and nitrogen sources. Common isolation media include starch-casein agar, glycerol-asparagine agar, and oatmeal agar. Selective antibiotics like cycloheximide and nystatin may be added to inhibit the growth of other bacteria.


Why is agar added to nutrient media?

Agar is added to nutrient media as a solidifying agent. It provides a solid surface for bacterial or fungal growth to occur and can be easily sterilized. Agar also allows for the isolation and enumeration of colonies for microbiological analysis.


How do you make pitri dish gel agar?

To make a petri dish agar gel, heat water and agar powder in a saucepan until the agar dissolves. Then pour the mixture into petri dishes and allow it to solidify. Agar provides a solid medium for growing microorganisms in petri dishes.


How many fatty acids are added to a glycerol molecule to make a triglyceride?

Three fatty acids are added to a glycerol molecule to form a triglyceride molecule. This process involves the removal of three water molecules, resulting in ester linkages between the fatty acids and the glycerol.


Is broth has agar?

Agar is a type of gelatinous substance obtained from seaweed, used as a culture medium in laboratories and as a thickening agent in food. Broth typically does not contain agar unless specifically added to it as a thickener.


Why is glycerol and blue dye added to the gel loading buffer during gel electrophoresis?

Glycerol is added to make the DNA sample denser so that it sinks into the gel and loads properly. Blue dye is added to visualize the sample loading and migration progress during electrophoresis.


Do you put agar in the petri dish before you put the swabbed bacteria?

Yes, agar needs to be added to the petri dish before swabbing the bacteria. The agar provides a nutrient-rich medium for the bacteria to grow and form visible colonies. The bacteria are then swabbed onto the surface of the agar to initiate growth.


What will result when 1 to 5 agar is added to nutrient broth boiled and cooled?

The agar will solidify and form a gel-like substance in the nutrient broth. This agar-nutrient mixture is used as a solid medium for growing and isolating bacteria in a laboratory setting.


Agar agar grain found in Germany?

Agar, or agar-agar, is not a grain, but rather an extract of seaweed. Agar translates to German as Agar-Agar Try whole- or health-food stores


Why was agar cooled below 50 degrees celsius?

Agar is cooled below 50 degrees Celsius to prevent it from solidifying too quickly. This allows time for the agar to be poured into Petri dishes and to evenly distribute any added nutrients or samples before it solidifies. Cooling it slowly also helps to avoid the formation of air bubbles in the agar.