2
votes
1answer
14 views

How is Microenvironment strictly defined?

I started to think this definition of Wikipedia: Microenvironment (biology), a small or relatively small usually distinctly specialized and effectively isolated biophysical environment (as of ...
2
votes
0answers
18 views

Does trypsin strip flask coating?

Mammalian cell/tissue cultures sometimes require flasks coated with proteins. My uneducated guess is that these proteins mimic the ECM, perhaps the basal lamina, so finicky contact-dependent cells can ...
0
votes
2answers
16 views

How did aquatic dinosaurs go extinct?

Dominant theory is that 'normal' dinosaurs went extinct from ether super volcano or meteor impact or combination of both. However there were aquatic dinosaurs that are not present at this day. Was it ...
1
vote
0answers
37 views
+100

Does “Garbage Enzyme cleaner” contain cleaning enzymes?

There are many recipes which call for using fruit peel fermentation process to make a concentrated enzyme cleaner solution, some variations call to add bakers yeast. So the question arises that does ...
1
vote
1answer
21 views

Can a human cell live indefinetely in a controlled environment?

How long can a human cell live in a controlled environment, given all necessary nutrients, temperatures, and mechanisms for waste removal, and other requirements are provided for? Put differently: ...
0
votes
0answers
5 views

Are added yogurt cultures harmful to the gut?

I have read somewhere that the live culture added to yogurt acting as "healthy" gut bacteria are actually synthetic and harmful. Any truth to this? If so, what are some alternatives to getting good ...
4
votes
4answers
698 views

Do male animals visually perceive females as more/less attractive?

If we somehow remove pheromones, do animals experience a phenomenon similar to human "visual beauty" when looking at members of the opposite sex? For example, given a set of 20 female ducks observed ...
7
votes
1answer
742 views

What about a bat's immune system protects them from Ebola?

Current evidence indicates that fruit bats are a reservoir host for Ebola. Has any research established what is different about their cell biology or immune system that reduces virulence for them? ...
4
votes
1answer
176 views

How is it possible to even hope for an ebola epidemic of this current size to remain contained to a relatively small part of Africa?

As of 2014-09-14 at least 5347 cases of ebola have been identitied. Some estimates are much higher. While experts are sounding the alarm to try to get sufficient resources to contain the outbreak, ...
4
votes
1answer
87 views

Is ebola non-contagious until symptoms appear? Why?

There's been a lot of talk lately about the man who recently came down with ebola in Dallas, Texas. While I live elsewhere, I keep hearing quotes from CDC and state officials that ebola is not ...
4
votes
1answer
31 views

Fate of erythrocytes after splenectomy

The spleen is considered a graveyard for red blood cells. So in case of Splenectomy (complete surgical removal of the spleen), what would be the fate of red blood cells? Would this cause Polycythemia? ...
8
votes
1answer
1k views

To what extent is Ebola airborne? (aerosols)

Recently, CIDRAP at the University of Minnesota announced that Ebola may be more transmissible through aerosols than previously thought. I lack the familiarity with the field to critically evaluate ...
10
votes
1answer
1k views

How long does the Ebola virus remain infectious on contaminated items or surfaces?

I'm sure there will be variation depending on what the contaminated item or surface is made of - linens, I could imagine, would remain dangerous for longer than a door-knob. But if the items are not ...
7
votes
1answer
1k views

How does the ebola virus attack?

How does the ebola virus attack and how do some people get away with it? Normally any virus would attack a cell with some kind of receptors and some kind of lock and key mechanism entering the cell ...
0
votes
0answers
29 views

Installing MRBAYES [on hold]

I'm trying to get MRBAYES 3.2 to work on my linux computer (CentOs 6.4). I'm following the directions to compile the program from source from CompileInstructions.txt. It tells me to do the ...
1
vote
2answers
56 views

Is the quality of sleep dependent on sleep duration?

I've been facing this lately, where I will wake up in the middle of the night after sleeping for perhaps 2-3 hours and be wide awake, but when I go back to sleep, I wake up more tired than before. ...
4
votes
1answer
50 views

Are all functions of a human cell known? [on hold]

Please bear with me as I'm intruding into your world from a computer science background. In programming, once you have created a program, you know all functions of that program. Thus, 100% knowledge ...
3
votes
1answer
24 views

What does the root “phyllum” mean used botanical binomial nomenclature

I often encounter the root "phyllum" in bionomial names in botany, but I've had trouble finding an actual definition for this root in any Latin dictionary outside of its taxonomic meaning. From ...
5
votes
1answer
57 views

Can the negative afterimage appear only if there is light or is it possible in darkness?

Reading the following paragraph: After staring at the red and blue shamrock, you saw a green and yellow afterimage. Opponent-process theory proposes that as you stared at the red and blue ...
2
votes
1answer
22 views

Is viral protein expression important for peptide vaccine?

I would like to know if proteins expressed in higher quantities, such as DNA polymerase, would be better vaccine candidates for a T-cell based vaccine. Thanks, Bernardo
2
votes
1answer
19 views

Book recommended for neurobiology

I am looking for a good explanatory book concerning Neurobiology. I am interested on how the brain works but prior to this I believe that I have to start learning things about the biology of neurons. ...
1
vote
2answers
54 views

What kind of technology is required for plant seed DNA printing? [on hold]

I'm a programmer so I have little knowledge in the field of biology. However I have an interest in plants, GMOs and DNA (in terms of programming). So, I want to know what kind of technology is ...
0
votes
0answers
12 views

Can textiles with visible mold removed via vinegar and bleach still pose a health threat for babies? [on hold]

Our pram caught some mold after we accidentally forgot it in the rain: Green-ish dots all over. I'm rather nervous about the health risks of mold (asthma etc.), so I tried to remove it as good as ...
0
votes
0answers
21 views

Too much light in electrophoretic gel photo

The electrophoretic gel's photo shows too much light. Is it because the sample is not loaded properly? I can't see any gel lanes in my PCR samples or in the marker itself when photographing them.
3
votes
1answer
70 views

Ideal lab glassware cleaner for molecular biologist

I'm using Alconox powder detergent to clean my laboratory glassware, the powder is a pain to store near the sink and to use. Would like to make a concentrated liquid to use in its stead. I have ...
1
vote
1answer
10 views

What enables azacitidine to incorporate into both DNA and RNA?

I did a mini-project on the drug azacitidine for my pharmacology class, and I learned that azacitidine has the ability to incorporate into both DNA and RNA. I think this is really unique because a ...
1
vote
0answers
32 views

What houseplant is this? [on hold]

What houseplant is this on the photo? The plant is living in Russia. What conditions are the best for it? What is the best place in the room? How often should I water it?
2
votes
1answer
23 views

Concentration of caffeine in physiologically relevant setting

Caffeine is known to overcome G2/M (and possibly other types of) cell cycle arrest through its effects on DNA repair machinery and is used as a positive control in studies of cell cycle arrest. In ...
5
votes
2answers
47 views

What is the name of this plant with many purple blooms with orange inner parts?

I have photographed the following plant in Pittsburgh, PA. It has many blooms and every bloom is very small (about 5mm diameter), purple on the outer and orange in the inner. You can see it here: ...
2
votes
1answer
40 views

Nature Scientific Reports vs. BMC Genomics

I do not know if this question to suitable here or not. I posted it as I think biologists can help me in this question. If not suitable here, then I am sorry for that. I have written paper which I ...
0
votes
0answers
6 views

Do all species have asymmetric female meiosis?

In all the examples I can think of, (mostly vertebrate), female meiosis, or oogenesis, only haploid gamete is produced while the other cell divisions result in polar bodies. While male meiosis results ...
1
vote
1answer
55 views

How prominent is the gene-centric view of evolution among professional researchers?

Richard Dawkins famously advocated a gene-centric (as opposed to organism-centric) viewpoint on natural selection, most notably in The Extended Phenotype. However, I have also heard "on the grapevine" ...
0
votes
1answer
26 views

Is the Hypothalamus part of the Central Nervous System or Endocrine System

Sorry for a certainly naive question. Some references (for example https://faculty.washington.edu/chudler/nsdivide.html) seem to to indicate that the hypothalamus is part of the Central Nervous ...
1
vote
0answers
40 views

Is the attached digital camera on the top have the same magnification than visible in eyepiece? [on hold]

There are some microscopes with digital camera system attached to the top. But does it include or bypass eyepiece magnification? E.g. 40x objective lens and 10x eyepiece making the total ...
0
votes
1answer
48 views

What causes a polypeptide to fold into an Alpha helix over a Beta pleated sheet

I know how they fold, but what causes some polypeptide chains to preferably fold into Alpha-helix rather than Beta-sheets (or vice-versa). What force makes it fold into one conformation over the ...
1
vote
1answer
22 views

How do ants transport water?

All living things need water to survive. Worker ants can drink directly from the source. But a queen ant would need help from the colony to get its daily supply of food and water. I have seen ants ...
3
votes
0answers
20 views

More extreme phenotypes when parents are from diverged populations

In quantitative traits we have many loci affecting a trait. If we took a bunch of parents where all mothers and fathers were of a certain value at the upper end of a trait range, and then looked at ...
0
votes
0answers
12 views

Physiology of benign eye twitching?

About four times in my life I have experienced the feeling of my eyelid fluttering for a few minutes by itself, and then it stops. I have talked to other people who have had the same experience so I ...
0
votes
0answers
28 views

Have I stopped growing?? [on hold]

I'm 14yrs old, 95lbs, and 4.9ft tall. Everybody says that since both of my parents is short, that I've stopped growing. My mother is 5.2ft and My father is 5.8ft. Am I still growing?
1
vote
1answer
29 views

How non-invasive blood glucose concentration measurement work? [duplicate]

Diabetes patients need to conduct the “fingerstick” a few times a day. One of the mechanisms of "fingerstick" is to take small amount of blood sample and put it onto a test strip. The enzyme on the ...
0
votes
1answer
36 views

How non-invasive blood glucose concentration measurement work?

Diabetes patients need to conduct the “fingerstick” a few times a day. One of the mechanisms of "fingerstick" is to take small amount of blood sample and put it onto a test strip. The enzyme on the ...
14
votes
5answers
626 views

Pipetting damage on cells

I'm curious how much damage is potentially inflicted by shear stress by pipetting. I know that with syringes for stem cell injection cause a lot of damage. However, to what extend does this happen ...
3
votes
2answers
1k views

Is there any complex organism that is both autotroph and heterotroph?

Possibility also include "adaptation mode" if such exist. I don't discern whether autotrophic/heterotrophic part play only minor role either.
3
votes
1answer
33 views

Found a larva in my broccoli, is it a Small White (Pieris rapae)?

Found this living larva in broccoli from a store. It was about 10 mm long. It was in july this year, and I don't remember the country of origin for the broccoli. A bit of googling makes me think it ...
1
vote
2answers
52 views

Can Hepatitis be caused by Bacteria?

There are many information about viral hepatitis. But it is interesting for me, can bacteria cause the hepatitis too?
1
vote
0answers
13 views

Niche differentiation in birds of prey

I'm not much of an ornithologist but I know enough to distinguish most Central European birds of prey. To me it is amazing that there are so many species that seem to occupy the same niche. Especially ...
3
votes
1answer
67 views

Do you produce more sperm after 1 week of abstinence vs 1 year of abstinence

Question: I was wondering if the amount of sperm increase with the amount of abstinence? Side questions: Is their a max amount of sperm? What happens with the excess amount?
-2
votes
0answers
30 views

birth control pills and eugenics [on hold]

The birth control pill is one of the many measures that have been developed to control population. It is arguable that many proponents of eugenics in the years before the pill (1960) would have ...
0
votes
0answers
36 views

Regrowing Limbs using MatriStem; Research and Applications

Apparently, there is a substance (powder) called MatriStem which can regrow your nose and the tips of your fingers should they ever become diseased or severed. See here for photos (a bit graphic) ...
1
vote
3answers
73 views

Why is it better to drink room temperature water instead of cold water?

My teacher told me that drinking water that is room temperature is better for you then drinking cold water, but she did not tell me why that is. I want to know because I often drink cold water (with ...

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