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What is the chemical composition of malt extract agar?
thats a good question but unforunately i dont now the answer
What is the principle of agar diffusion method?
how to make a well on the agar for pour the extract
What is the nam of petri dish gel?
The gel in a Petri dish is called "Agar".
What is laboratory gel called?
Agar
Colour of salmonella in bismuth sulphite agar?
The color of salmonella in bismuth sulphite agar is brown to black color with metallic sheen.
Why do most microorganisms fail to use agar as a carbon source?
Because the agar remains a solid anywhere below 42 degrees Celsius. A typical environment is never going to raise above 42 degrees therefore it will always remain solid even in the human body (37 degrees Celsius). Having that said, most microorganisms cannot digest agar unless it is liquid.
What temperature does agar liquefy?
Depending on the media agar solidifies at 32 to 40 degrees Celsius. It remains firm up to about 65 degree Celsius.
What is melting point of agar?
85C
Why is agar preferable to gelatin as solidifying in culture media?
Agar, which is an extract of red marine algae, is preferred because only a few microbes can degrade the agar. It will remain as a solid during the growth of bacteria. It will stay as a liquid until cooled to 40 degrees Celsius. Once a solid, it will stay solid unless incubated at temperatures over 85 degrees Celsius. Agar melts at 85 °C (358 K, 185 °F) and will solidify from 32-40 °C (305-313 K, 90-104 °F). Since many scientific applications require incubation at temperatures close to human body temperature (37 °C), agar is more appropriate than other solidifying agents that melt at this temperature, such as Gelatin.
Why is agar superior to gelatin as a solidifying agaent?
Agar, which is an extract of red marine algae, is preferred because only a few microbes can degrade the agar. It will remain as a solid during the growth of bacteria. It will stay as a liquid until cooled to 40 degrees Celsius. Once a solid, it will stay solid unless incubated at temperatures over 85 degrees Celsius. Agar melts at 85 °C (358 K, 185 °F) and will solidify from 32-40 °C (305-313 K, 90-104 °F). Since many scientific applications require incubation at temperatures close to human body temperature (37 °C), agar is more appropriate than other solidifying agents that melt at this temperature, such as Gelatin.
Why is culture medium cooled 48 temperature before is poured?
In pour plate technique the culture to be grwon is pour in melted agar medium, now when we add the diluted sample in agar plate and if the melted agar is very hot, it can lead to the damage of bacterial or fungal cell and may cause in abruption of growth, so the agar is cooled to get the optimum temp. for growth of microbial cell.
Why doesn't the 48-50 degree Celsius of the melted agar killed most ofthe bacteria?
Most bacteria grows within that range of temperature. 74°C will kill almost all bacteria. Bacteria were among the first life forms to appear on Earth, and are present in most of its habitats.
Why is agar preferable to gelatin as a solidifying agent in culture media?
Agar, which is an extract of red marine algae, is preferred because only a few microbes can degrade the agar. It will remain as a solid during the growth of bacteria. It will stay as a liquid until cooled to 40 degrees Celsius. Once a solid, it will stay solid unless incubated at temperatures over 85 degrees Celsius. Agar melts at 85 °C (358 K, 185 °F) and will solidify from 32-40 °C (305-313 K, 90-104 °F). Since many scientific applications require incubation at temperatures close to human body temperature (37 °C), agar is more appropriate than other solidifying agents that melt at this temperature, such as Gelatin.
Which group of algae produce agar agar?
Agar comes from Red Algae (primarily the Gracilaria genus).It mainly is produed from the red algae Gracilaria lichenoides.This algae is harvested along the western coast of the United States and in parts of Asia. To extract the agar the Algae is boiled, cooled, purified and then dried. The agar is then make into blocks, flakes, or granules.("Agar agar" is usually abbreviated as "agar".)
What will result when 1 to 5 agar is added to nutrient broth boiled and cooled?
Solid medium
What will result when 1 percent to 5 percent agar is added to nutrient broth boiled and cooled?
a solid medium
Why the temperature of agar must be no lower than 45 degree celsius and no higher than 50 degree celsius?
im stuck on the same thing!
