1
vote
0answers
32 views

similarity of genome sequences

I would like to get the percentage of similitude of two genomic sequences, the supercontigs are obtained from: ...
5
votes
3answers
997 views

What is the relationship between sexual and and natural selection?

In http://www.nature.com/nature/journal/vaop/ncurrent/full/nature12701.html, they say: Thus, it seems that the diverse coloration in this species is promoted by both natural and sexual selection. ...
1
vote
0answers
11 views

issues with MultiPipMaker

I would like to use MultiPipMaker for testing a genome alignment between two sequences, each sequence is in .fasta format, but the problem is that when I submit the couples of file that I need, the ...
1
vote
0answers
36 views

algae lamp questions?

I would be wondering if you help me if you know about algae lamps please give me detail about it and answer my questions This is my questions? how the algae will charge the battery in day?(process) ...
2
votes
0answers
22 views

What is the origin of viruses? How could they get both living and non-living characteristics? [duplicate]

I read that viruses are called intermediate between living and non-living particles. Well, if so, then where did they originate from? From living or non-living? If they originated from either living ...
1
vote
0answers
28 views

Is there an evolutionary advantage for hamsters throwing up food when scared?

My hamster throws up food when scared, and from a general Google search it seems that other hamster-keepers experience the same thing. Why do hamsters do this? What advantage does it serve - now and ...
1
vote
2answers
131 views

How was the heritability of IQ tested?

I have read that IQ is highly heritable. How could this be tested? For honest testing, it seems to me that only children who were abandoned should have been tested, to exclude education effect. Was ...
2
votes
2answers
176 views

How much natural genetic variation is there between bacteria of the same species?

There are lots of questions about how and why there is genetic variation between organisms of the same species, but I haven't been able to find a numerical value for the expected amount of genetic ...
1
vote
1answer
348 views

What is the physiological difference between snorting/swallowing cocaine

I know that mucosa inside the nose absorbs cocaine molecules when snorting cocaine, but what difference is there compared to swallowing? Also more cocaine administration equals more cocaine molecules ...
4
votes
1answer
73 views

Is it true that there is a spider that eats parasites from caterpillars

I think I once saw a video of a caterpillar that could get infected by a parasite, and could die of that, unless a specific kind of spider would eat the parasite, and so once the caterpillar is ...
3
votes
1answer
57 views

Which is harder to contract - HIV or AIDS?

I am working on mathematically modeling HIV and Tuberculosis Co-infection dynamics, and am working with 12 differential equations describing the behavior of all of the compartments and parameters. ...
3
votes
1answer
55 views

Non-fatal / low-harm measurement of Drosophila traits

I am trying to generate some candidate traits to measure in a fitness assay of wildtype outbred (lab population) flies. The key trait I will measure is lifespan. I am looking for some additional ...
1
vote
1answer
26 views

What Freshwater Fish Are Affected By Magnetic Fields

I am interested in knowing which freshwater fish are affected by magnetic fields. I've heard that Lake Sturgeon are, but would like more references. This is for a project that will have buried 3 ...
1
vote
0answers
37 views

Linearity with SuperScript® VILO™ Master Mix?

I would like to know your experiences with SuperScript® VILO™ Master Mix. According to de manufacturer, this kit maintains linearity from 1 pg to 2.5 µg in a 20 µL reaction. enter link description ...
1
vote
1answer
54 views

Dimethyltryptamine and Sigma 1-type opioid receptor interaction

Where exactly do dimethyltryptamine and sigma 1-type opioid receptor interact? I read in this When the Endogenous Hallucinogenic Trace Amine N,N-Dimethyltryptamine Meets the Sigma-1 Receptor but it ...
1
vote
1answer
171 views

Why does beta-2-Thienylalanine inhibit bacterial growth?

I'm trying to obtain a better understanding of the Guthrie Test, which checks whether people have a disease called PKU. The Guthrie test uses bacteria to check for Phenylalanine (the amino acid) in ...
1
vote
2answers
38 views

Does a piezoelectric organic substance exist?

that contracts rapidly, in 10 seconds or less, by .5mm or more, when bombarded by electrons as from a cathode ray tube? or expands? could either be living tissue or dead organic matter. thanks!
1
vote
1answer
559 views

How do the first and second law of thermodynamics adhere to breakdown of glucose?

I know the first law is energy can only be converted from one form to the other, therefore in the breakdown of glucose 40% potential energy is converted to ATP and 60% is converted to thermal and ...
1
vote
1answer
66 views

What is an on-line measurement? What is an off-line measurement?

See it used here: http://en.wikipedia.org/wiki/Fed-batch. In the table giving the different strategies to control growth in a fed-batch culture, one finds, for example: "on-line measurement of ...
1
vote
1answer
50 views

Enzymatic Protein Deglycosylation of TCL

I've done O- and N- linked enzymatic deglycosylation of purified and lyophilized proteins. Following some modifications to the manufacture's protocol, I had great results. I now want a student to ...
-4
votes
1answer
117 views

How is it proved, that antediluvian people didn't live for hundreds of years? [closed]

Bible says that antediluvian people lived for 800-900 of years. Nowadays apologists say that it is possible and that we just can't know the truth. I know that one of the basic science principles is ...
2
votes
0answers
16 views

Are there any antigen electronic sensors?

Is it possible somehow to attach antibody to silicon or to other electronic component chemical, and have electronic detector of correspondent antigen? Does such devices exist?
2
votes
3answers
351 views

Are all body atoms really recycled several times during a life?

I heard a point, that all (human) body atoms are recycled withing short period like few years. Recycled means "old" atoms are replaced by "new" ones during metabolism, leaving only structure ...
2
votes
1answer
102 views

Should the length of the electrodes in the electrophoresis chamber be proportional to chamber's size?

I am trying to build a small horizontal electrophoresis chamber from scratch. I want to use it for comet assay and I will be using only 1 slide, so it's going to be about 3cm wide, 10cm long and 4cm ...
1
vote
0answers
65 views

What causes a selective shift of colour perception after removing wavelength filtered glasses?

Background To improve sleep by reducing blue-light melatonin disruption, I wear night-glasses that filter short wavelengths (e.g. something like these). With these glasses on, both the top and bottom ...
3
votes
1answer
43 views

Where can I find a full genealogy of human cell types?

It is said on Wikipedia, that the precursor of blastocyst is a morula, and that the precursor of morula is a zygote. This gives us the part of genealogy tree of cell types. Unfortunately, no full ...
6
votes
1answer
62 views

How well supported is the hypothesis that aging is mainly caused by the number of mutations in tissues?

I heard the hypothesis, that the (main) reason of aging is the increasing number of mutations in body tissues. The higher the number of mutations is, the older tissue is. Is this true? And how well ...
3
votes
2answers
2k views

Does bright environment strain eyes more than dim?

I'm trying to figure out how to modify my working conditions so that I can program longer without harming my eyes. Because doing so experimentally hasn't given conclusive results so far, I decided to ...
8
votes
2answers
1k views

Why do humans find baby animals cute?

Why do humans find baby animals like cats, dogs, ... so cute? As these are potential competitors or even natural enemies (like e.g. tigers, leopards, ..), the protection instinct (reasonable for the ...
1
vote
2answers
99 views

What does ophthalmologist see in your eye?

I always wondered what ophthalmologists see inside someone's eye and what they're looking for. The whole thing is a mystery to me. Are there any photos of what the eye of a patient looks like from the ...
2
votes
1answer
94 views

New GO terms after TopGO enrichment?

I ran an enrichment analysis with custom annotations using TopGO and surprisingly I obtained new GO terms inside the significant GO terms. Is that possible? The only reason I can imagine this is ...
2
votes
1answer
68 views

Terminology question about the correct term for areas of biological research

I am writing a paper about DNA sequence prediction. DNA sequence prediction is done across various areas of biology, including, for example, RSS sequence prediction (in immunology) and prediction of ...
0
votes
1answer
60 views

Does the eye image interval refresh? [closed]

It's known the human eye takes 24 images per second. But does this refresh? For example after sleeping. Or will it always be the same interval? I talk about when the eye takes the images. So it are ...
3
votes
1answer
897 views

What is the definition of “dry weight” and “dry cell weight”?

As I understand it, the dry weight of something is its weight minus the weight of its water content. Is this the definition? What about dry cell weight?
3
votes
0answers
37 views

Adenosine metabolism

Are adenosine or its catabolites increased in inflamed airways? How can I assess this? I am trying to use inhibitors for adenosine deaminase, xanthine oxidase, and purine nucleoside phosphorylase, but ...
3
votes
1answer
74 views

Attachment of muscles during molting in insects

Normally, insects' muscles are attached to their exoskeleton but what happens to this attachment when they are moulting? Sorry if this is an extremely silly question but I have wondered about it for ...
4
votes
1answer
142 views

How does a fungus protect itself from digestion by other fungi?

If a fungus releases its digestive enzymes outside its body, how does it protect itself from digestion? How do fungi growing nearby protect themselves? I have tried searching this on google but ...
6
votes
2answers
185 views

Probability of Extinction under Genetic Drift

Here is the Wright-Fisher model of genetic drift: $$\frac{(2N)!}{k!(2N-k)!}p^kq^{2N-k} \Leftrightarrow \binom{2N}{k}p^kq^{2N-k}$$ where $\binom{2N}{k}$ is the binomial coefficient. This formula ...
2
votes
1answer
51 views

How do you estimate global species richness?

I know how estimates of species richness in a small area are made. But how do you estimate the total number of species on a global scale? One example of such a method can be found in Mora et al. ...
5
votes
2answers
300 views

Can this image be the result of a Western Blot?

I am currently researching image manipulation in the life sciences and stumbled upon a Western Blot looking very similar to the image below. For creating the image I have cut out the blot using the ...
5
votes
1answer
75 views

Competition for mates in sea horses

This source here ...research has shown that it is STILL the males that compete for females. says that male sea horses compete for mates but this source here Females exhibit a ...
2
votes
0answers
43 views

Removal of the Initial Methionine in Venus for FRET

I'm working on building some FRET reporters. In addition to a cleavage site (of varying composition from 15-18AA), a 1 AA linker, I'm using Venus and Cerulean. Initially I was worried that 18AA ...
4
votes
1answer
201 views

Are there any types of cancer that cause neurons to divide?

After birth neurons generally do not divide. But is there any specific type of rare cancer or tumour where neurons divide? And if there is such a cancer, then how is it possible for a neuron to regain ...
2
votes
1answer
440 views

What is Luc Montagnier's research on electromagnetic signals from DNA about?

After reading a Youtube comment, I started reading on Luc Montagnier's research on electromagnetic signals from DNA. I haven't been able to find a source that would clearly explain what it's about. I ...
4
votes
0answers
145 views

Genetic expression in interspecific hybrids

Referring to interspecific hybrids, I have the following two questions:- Quoting from wikipedia:- The offspring of an interspecific cross are very often sterile; thus, hybrid sterility ...
4
votes
0answers
48 views

Does DHA increase the effects of clarithromycin?

I've read on this publication that every drug that induces CYP3A can reduce the effectiveness of clarithromycin. Clarithromycin inhibits CYP3A. But it does not say anything about the opposite ...
1
vote
0answers
36 views

Are there mice pedometers?

I am seeking to make treatments for arthritis. Earlier, I asked a question about Protocol for measuring stamina of arthritic mice, and I also know that some earlier studies have used pedometers. As a ...
1
vote
2answers
59 views

Protocol for measuring stamina of arthritic mice

I am going to make some mice ill with arthritis. The medicine which I am testing as control is known to cause extreme fatigue. I think I've improved it. I'd like to humanly measure their stamina in ...
4
votes
1answer
146 views

Microarray data and analysis tools

Microarray has various uses, and to analyse the data a main function classification is used. There are many methods used to classify the data but what are the best and most frequently used methods? ...
6
votes
1answer
118 views

Does knowing the sex of each of a couple’s first N children have any marginal value in predicting the sex of child N+1?

Does knowing the sex of each of a couple’s first N children have any marginal value in predicting the sex of child N+1? By “marginal” I mean predictive power beyond other known effects, e.g., the race ...

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