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Why is it necessary to use only diluted cultures that contain 100 to 200 cells for successful spread plate?
If this is the question asked in your lab manual, welcome to the club. That's because diluted cultures produce little blue men and some pink powders also lots of chocolates when they are put on a spread plate and it yields a successful happy life for you. Tell that to your teacher and you'll get an AA.
What else can I help you with?
Why sample need to be diluted?
Samples sometimes need to be diluted to bring their concentration within the range of the measurement method, to prevent interference or saturation of the detector, or to ensure that the sample is compatible with the analytical equipment being used. Dilution can also help reduce matrix effects and improve the accuracy of the analysis.
1 how are microorganisms diluted and spread out to form individual colonies In the streak plate technique?
Bacterial mixture is transferred to the edge of an agar plate with an inoculating loop and then streaked out in one of several patterns. At some point, individual cells will be removed from the loop and will give rise to separate colonies.source: http://quizlet.com/17578430/micro-lab-unit-1ex-15-16-streak-plate-technique-flash-cards/
When a student adds a few drops of diluted picric acid to a paramecium slide he observes that the paramecium releases some transparent spine-like projections to protect its body from the acid. What is?
The transparent spine-like projections that the paramecium releases when exposed to diluted picric acid are likely trichocysts. Trichocysts are organelles found in ciliates such as paramecia that can be discharged as a defense mechanism against potential threats, such as chemical irritants. They are used by the paramecium for protection and to deter predators.
What pH does rennin work best?
the optimal pH for rennin is around 1-2, as this closely resembles the acidic environment of the stomach where rennin is most commonly found. However rennin also works at neutral pH, although at a much lower level of reaction. This is necessary because sometimes the stomach is diluted by outside materials.
Will isolated colonies of bacteria always be in the fourth sector on the streak plate?
No, isolated colonies of bacteria may not always be in the fourth sector on the streak plate. The placement of isolated colonies can vary depending on factors such as the distribution of bacteria on the plate and the streaking technique used.
Why it necessary to use only diluted cultures that contain 100 to 200 cells for a successful plate counting?
It is necessary to use only diluted cultures that contain 100 to 200 cells for a successful plate counting because above that the colonies will be too dense on the plate and counting them will be difficult. Also, many of the colonies will merge.
Do ink eradicators contain pigs wee?
No, they are probably a mild diluted bleach.
How do you dilute sodium chloride solution?
Sodium chloride (and other compounds) are diluted only if it is necessary, this depends on each application.
What substances need to be diluted?
Substances that may need to be diluted include concentrated acids, bases, cleaning chemicals, and pharmaceuticals. Dilution is often necessary to reduce the concentration of the substance to a safer or more appropriate level for use.
What volume of the stock solution (Part A) would contain the number of moles present in the diluted solution (Part B)?
This depends on the dilution ratio.
What happens when you swallow an acid what happens to your stomach acid?
it is diluted Edited: It is NOT diluted. It is neutralized.
Is spelt flour soluble in water?
Spelt flour is soluble in water. However, it must be completely diluted as it does contain some gluten and it will thicken as a result.
A solution that does not contain enough solute?
A solution that only contains a small amount of solute, is a dilute or very dilute solution.
How do you clean a sunbeam water cooler?
To clean a water cooler dispenser, remove all filters and run 35% food grade hydrogen peroxide diluted with 11 times as much water through the dispenser. It is necessary to use food grade hydrogen peroxide as it does not contain the harmful stabilizers contained in regular 3% hydrogen peroxide. The dilution step is necessary because otherwise the peroxide will be too caustic.
Is diluted ammonia acid or alkaline?
alkaline.It contain a lone pair.So it can donate this making it a base
What volume of the stock solution (Part A) would contain the number of moles present in the diluted solution (Part B)?
This depends on the dilution ratio.
As an investor are basic or diluted earnings per share more important?
Diluted earnings per share Diluted earnings per share
