Questions tagged [microbiology]

Microbiology is the study of extremely small organisms. This includes organisms like bacteria, fungi, protozoa, and viruses.

Filter by
Sorted by
Tagged with
0
votes
0answers
17 views

Creating a phylogenetic tree from my selected publicly-available sequences (WGS) in NCBI

I'm currently writing a paper on the comparison of virulence genes for a group of bacteria. I got my data from publicly-available whole genome sequences in NCBI. Now, I want to create a phylogenetic ...
0
votes
0answers
39 views

Cell morphology of cocci

How can we differentiate between a tetrad(4 cells) and a sarcina(8 cells) arrangement of cocci under a light microscope, since both will look same in 2D plane??
-1
votes
0answers
19 views

How does the Oligodynamic function?

I am trying to learn about the Oligodynamic effect in metals which kills micro-organisms (e.g. bacteria). I could not find much information about how in details does it kill microorganism. All I know ...
0
votes
0answers
24 views

Microorganism that can produce oxygen or water on mars

Has anybody found bacteria/microorganism that can produce water and/or oxygen on mars ? I mean , these microorganism not only should be able to use chemical available on mars , but also survive from ...
-1
votes
0answers
9 views

Why is Bacillus anthracis long in the culture medium and single in the tissue? [closed]

Why is Bacillus anthracis long strand in the culture medium and single in the tissue?
-1
votes
0answers
6 views

Which bacteria has lateral endospore? [closed]

Which bacteria has lateral endospore? Is it Bacillus or Clostridium?
6
votes
4answers
123 views

Are there any organisms that are made of more than one (~5-12) cell?

Prokaryotes and eukaryotes are unicellular, made of one cell. Great. Eukaryotes are unicellular or multicellular. But the typical examples of multicellular eukaryotes we have are made of, often, ...
1
vote
1answer
15 views

Winogradsky column and hydrogen sulfide

For a science experiment for school, I have set up 15 Winogradsky columns, and will be looking at the microbial growth inside the columns over a period of 25 days. I have read that, due to gas ...
0
votes
0answers
28 views

Are these strands on surface of dog drinking water bacteria?

For our dogs, we have a water bowl that we refill whenever it gets low and completely wash clean every other day or so (sooner if it’s obviously dirty). Sometimes when I pick up the bowl to wash it, I ...
0
votes
0answers
10 views

Eukaryotic cell lysate-based protein expression efficiency

What is average efficiency of eukaryotic cell lysate-based protein expression systems in terms of (mg of protein expressed) / (mg of lysate) ?
2
votes
1answer
93 views

Are the y-axis values informative when performing biolayer interferometry?

I am currently reading an this article by Alexandra C. Walls et. al. I would like to ask a question about a graph that is being used in the article and I wanted to know if my analysis was correct. I ...
0
votes
0answers
85 views

What are these clear sacs all over my house and coming out of my faucet?

I live in el Monte California which is in southern California. I keep finding these egg like sacs on my floor and on everything in my apartment. They are coming out of our water faucet in every room. ...
0
votes
0answers
23 views

Aerosolised particle released during autoclaving

During autoclave heat-up, the inside chamber's air is released in order to be displaced by steam. Because of that, many modern autoclaves are equipped with filters at the release outlet. The ...
-5
votes
0answers
44 views

Can we use ultrasound to disable/denature viruses such as COVID

Can we use ultrasound to create a resonant frequency to that of the molecules within the shell of the covid-19 virus and cause them to "shatter" just like a wine glass and an opera singer. I ...
-3
votes
1answer
43 views

Can Euchromatin convert into Heterochromatin?

I know that Heterochromatin can convert into Euchromatin but is the reverse possible? If yes, then How?
2
votes
1answer
131 views

What keeps mitochondria from multiplying out of control?

What keeps mitochondria from multiplying out of control and killing the cell? According to endosymbiotic theory, mitochondria were once free-living bacteria that got ingested but not metabolized by ...
37
votes
5answers
7k views

Can bacteria be killed by purely physical trauma?

In a question over on Skeptics Stack Exchange, I half-jokingly listed "blunt force trauma" as a means by which a bacterium could be killed. That makes me wonder if it really is only a joke ...
33
votes
2answers
4k views

Can a bacterium infect another bacterium?

I researched about it by searching on Google and reading some bacteriological articles, but I did not get any answer. I also asked some of my teachers, and they were also a bit confused. Some said ...
7
votes
1answer
372 views

circular pattern of mold on quince

Could someone explain why mold on my quinces grows in well separated circles around a center? To make clear, what I mean I post the picture
0
votes
1answer
39 views

bunsen vs meker for best sterile field [closed]

I need one bunsen and i have a friend that sells me a bunsen-meker burner. I see that bunsen-meker burners have more flame diameter, so should have more diameter of sterile field, but i dont know XD ...
-1
votes
1answer
41 views

Are plasmids found in eukaryotes? [closed]

There are some who says plasmids are found in some eukaryotes but is it like scientifically proven?
0
votes
1answer
28 views

Low-cost simple water testing for faecal contamination

I live in Indonesia and there are lots of sewage pipes discharging directly from homes/restaurants/etc directly into the river. It's also common to wash clothes and so on, so there is likely detergent ...
2
votes
1answer
34 views

Can viruses be deformed?

Viruses are created in their fully-formed state and do not grow. But one thing has been bugging me lately: can a virus be deformed, e.g. in order to fit into an opening slightly smaller than itself? ...
1
vote
2answers
102 views

What is the adjective for PHAGE? [closed]

if the adjective of the noun BACTERIUM is 'bacterial' and that of VIRUS is 'viral', what is the adjective for (BACTERIO)PHAGE? Is 'phagial' accepted? Thank you
1
vote
0answers
23 views

What types of cells HPV can infect? [closed]

I am wondering if there is any new information on which cells HPV is able to infect. Is it still limited to squamous cells or are there other cells such as columnar cells it is able to infect?
7
votes
1answer
86 views

Can anyone identify this microorganism?

I was examining some rainwater from my backyard in Richmond, VA, and found this microorganism. I took some pictures of it at 400x and 1000x (see below). The microorganism is attached to some moss and ...
0
votes
1answer
351 views

Can a second mass extinction by microbes happen?

Science Daily reports that the mass extinction at the end of Permian period happened by the Methanosarcina archaea wiping out 90% of species: Methane-producing microbes may be responsible for the ...
-1
votes
1answer
53 views

What is the difference among these compounds?

I'll preface this question by making clear that I'm not not well versed in biology. Anyway, within the context of biocides/antimicrobial products using them as active substances, what is the ...
0
votes
1answer
18 views

types of cells in a pharyngeal specimen

I would like to ask what type of cells should someone expect in a pharyngeal smear, in a person, who is infected with a viral infection. Thank you a lot!
4
votes
1answer
206 views

Will obligate aerobic bacteria die if placed in a buffer solution even in the presence of oxygen?

The electron transport chain in aerobic bacteria functions by pumping H+ out of the cell to establish a concentration gradient. So if the bacteria are placed in a buffer solution having pH equal to ...
0
votes
0answers
16 views

What is the difference between chrysophytes and protozoa?

Amoeba is present both as a protozoa and as a chrysophytes.How to understand ,with which defining feature to which group to classify into?
0
votes
1answer
34 views

Is there any description about how microbes spread from a small place to a very large place?

Is there any materials (such as books, papers or others) about how microbes (such as the bacteria or virus) or a special kind of microbe spread from a small place to a very large area (such as the ...
0
votes
0answers
56 views

Is there such a thing as an autotroph that doesn't use photosynthesis?

I've heard of photoautotrophs, which are just autotrophs that use photosynthesis. What I'm wondering is if there's any other way for an organism to make its own food that doesn't involve it using ...
1
vote
0answers
23 views

Does thimerosal have some of the same mechanism of action as sodium benzoate?

I noticed that thimerosal's molecular structure is basically just sodium benzoate with an attached chain that includes a mercury atom. Sodium Benzoate Thimerosal The Wikipedia article for thimerosal ...
4
votes
1answer
82 views

How does the DNA cross through bacterial cell wall during electroporation?

There exists a lot of literature on electroporation of Gram-positive and negative bacteria. Most of it gives an explanation that electroporation works by creating transient pores in cell membranes of ...
1
vote
1answer
80 views

Quantification of various amino acids from bacteria?

I would like to characterise how much of various (uncommon) cytosolic amino acids are produced in bacteria, and was wondering if there are good suggestions of how to go about doing this. I know that ...
1
vote
0answers
25 views

Why Vibrio Cholera produce its toxins?

I was wondering, why V. Cholera synthesize toxins which induce in humans diarrhea? I know that diarrhea is protective mechanism for humans, to get rid of bacteria. But why V. Cholera just stop ...
16
votes
3answers
2k views

Why does an autoclave need to pressurize steam?

I've looked this up on other sites and they say that an autoclave needs high pressure in order to raise the boiling point of water so that you can achieve steam of a higher temperature. If you look ...
0
votes
0answers
20 views

Examining antibody - target interactions in PyMOL

I'm a student currently looking at antibody responses against a viral target protein of interest. I have my own, annotated PyMOL session of my protein and I also have .pdbs of crystallised antibody ...
2
votes
0answers
31 views

Can human pathogens present on plants become plant pathogens?

Since human pathogens sometimes live on the surface of plant leaves(read here and and here), and there are plant-pathogen microbes also living on leaf surfaces, is it possible for plant virulence ...
-1
votes
1answer
83 views

What's this parasite?

Any microbiologists or parasitologists recognize this? It's from my pet bearded dragon in the eastern US and the vet's never seen it before.
0
votes
1answer
50 views

How can I obtain a uniform bacterial sample?

I'm currently doing a research project wherein I will be testing the antibiotic resistance of a bacterial sample. Due to a risk of contamination during transport, I'm not allowed to request a uniform ...
2
votes
1answer
42 views

What fraction of human cells gets infected during a viral infection?

As I understand, if a cell gets infected during a viral infection then it eventually dies. If an individual does not die of an infection, the percentage of cells that gets infected in the course of ...
-1
votes
1answer
47 views

Why viruses “die” outside the host? [duplicate]

Why viruses "die" outside the host after sufficient time? I want to know the biological process behind it. What role being exposed to air plays in virus destruction? What role sunlight plays in the ...
1
vote
0answers
15 views

When purifying plasmid DNA after cloning, do you get endogenous plasmid in addition to your vector of interest?

Since bacteria naturally contain plasmids, when you do a cloning experiment and purify the plasmids at the end, do you get plasmid naturally present in that bacteria in addition to your vector? The ...
1
vote
0answers
35 views

Can DNA rings, i.e. plasmids, form as Möbius strips?

I know that plasmids can be present in a coiled form, which keeps the DNA strands together when they degenerate, by forming catenases. I was wondering, however, whether it has been documented to ...
-1
votes
1answer
61 views

How effective is rinsing in removing microbes from surfaces

Microbes including viruses stay alive on surfaces depending upon the type of the surface like steel, wood, plastic, glass, marble etc. How effective is rinsing these surfaces with tap water in ...
0
votes
0answers
24 views

Can I use a Flask Weight Ring to increase RPM in an orbital shaking incubator?

I am working on a device that goes on top of the flask. This reduces the maximum RPM that I can use. Therefore I am wondering if I can use a Flask Weight Ring for Erlemeyer flasks in a orbital ...
0
votes
0answers
27 views

How can Saccharomyces cerevisiae live in a dried state for long periods of time?

I want to know how can the Saccharomyces can live for so long in dried form. I am talking about the dried yeast used in baking .
-2
votes
1answer
88 views

Can/have bacteria been engineered to express ACE 2 receptors?

In light of SARS-COV-2 binding to the ACE 2 protein in human cells, I was wondering if any bacteria exist or could exist that possess this membrane protein. If not, do you believe that an ACE 2 like ...

1
2 3 4 5
17