Questions tagged [microbiology]
Microbiology is the study of extremely small organisms. This includes organisms like bacteria, fungi, protozoa, and viruses.
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Why are serial dilutions required for Most Probable Number method?
I'm a freshman in microbiology and molecular genetics so I am still starting on the basics.
I've completed an experiment to estimate the population size of lactose fermenting microorganisms in river ...
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What is causing vanilla yogurt to form a mucus-like texture
I routinely make yogurt at home using a simple home kit. The kit involves dissolving, in water, a pre-mixed sachet with (in no particular order) milk powder, sugar, flavourings and live (so the kit ...
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I also have been wondering what type of insect this was. I live in Louisiana
Just wondering if they bite? Also I have had a some kind of insect that tends to dive bomb me while I'm in the bathroom, could it be this one?
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Glutaraldehyde and bacteria
Can Glutaraldehyde act as a carbon source for nitrifying or other beneficial bacteria or not, specifically at a low dose in aquarium water?
I know that Glutaraldehyde is a carbon compound, but I don't ...
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Is this calculation about drawing cells to scale correct or is there a typo? Am I missing something?
I found this in a year 11 biology study guide from excel. It’s about drawing cells to scale. It says 3.5cm but I think it converts to 350 000 but I thought there is only 10 000cm in a micrometer which ...
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How fast do germs typically travel across food?
There are lots of easily searchable resources on how fast germs get transmitted to food via direct contact (essentially instantly). But I've never seen any discussion of how fast germs travel across ...
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Is it difficult to focus on the microbe using a microscope camera when the magnification is 40x?
I am using a ToupTek camera to take images of sludge. The model is XFCAMTOP4K8MPA.
The camera image is clear when the magnification is at 4x and 10x.
But when the magnification is at 40x, the camera ...
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E.coli Conjugation Experiment - Operons drop after X time and then raise again
We did an experiment in Uni where we tried to check which operons pass after X time.
This is the donor operons: Hfr, met-, ...
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Test Strains Permit Question
I am in the works of setting up a brand new micro lab for a small company, and I am trying to figure out the microbe test strains I'd need. My company is creating ivermectin injection products and ...
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How to make a negative control
In USP <61> (United States Pharmacopeia), it mentions that we would need a negative control when we are testing products for any microbial growth. It doesn't necessarily explain how to make ...
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How to design primers contanining random "NNNN" nucleotides?
I need to synthesize this primer: GACCATCTAGCGACCTCCACNNNNNNNN. This primer contains eight random nucleotides in the 3' end. This primer can be used for viral metagenomics, and the last 8 "N"...
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Unknown bacterial culture
I had taken a sample of bacteria from my toilet bowl and allowed it to grow on an agar plate. After 3 days, it now has a number of colonies and smells really bad. This was originally for my school ...
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Can anyone identify what is this?
I’m trying to see how can I identify this by similar characteristics but it doesn’t look like bacteria nor protozoo. This is a sample from standing water.
For the third image there is a dissected “...
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How is convenience sampling used in healthcare-associated infections prevalence studies?
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Examples of such studies:
Prevalence, Antimicrobial Drug Resistance and Associated Risk Factors of Streptococcus Pneumoniae Bacteria Infection Among
Under-Five Children With Acute Lower ...
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Identification of cellular membrane damage using a microscope and gram stain
I am observing E.coli under a microscope at 1000x with a gram stain, and I was hoping to identify potential cells with cellular membrane damage.
In my experiment, I had a negative control sample of E....
