4
votes
1answer
363 views

How does toluene inhalation damage the brain?

We just had a discussion about toluene abuse. It is known, that people inhaling toluene for a long time have significant brain damage, including decreased intelligence. I found that toluene is a ...
-4
votes
0answers
29 views

Do chemical differences in the male and female body influence differences in brain development? [on hold]

I asked the question Have different mental strengths evolved in men and women?, being curious about differences in the mental strengths of men and women, but after reading that men and women have very ...
1
vote
0answers
19 views

Why HIS tag is not detected in WB or dot blot?

I would like to know why the recombinant protein with his tag at c terminus is not being detected neither in western blot or dot blot. I'm trying to validate protein expression of four proteins. ...
1
vote
2answers
63 views

Should hydrogen peroxide be applied on a bloody nose? [on hold]

When I was a kid, my parents taught me to apply hydrogen peroxide on my nose whenever it bled. It's a rare event, but my nose bleeds from time to time, and when it does, I always go through the same ...
0
votes
3answers
32 views

What is the relationship between protein-protein interaction networks and metabolic networks? [on hold]

I am trying to find out how these networks can be linked together. I know that Protein-protein interaction networks and metabolic networks both fall under the Intra-cellular type of biological ...
0
votes
1answer
57 views

Do men and women have parts of the brain that show different level of activities? [on hold]

I think that men and women are different mentally (but nonetheless equals), however this way of thinking is very hard for me to explain philosophically, so I'd like to learn about what roots this ...
1
vote
0answers
17 views

Normal ECG/EKG Measurement?

I'm getting started using ECG using a 3 lead system by iWorx. I have place the leads on my two wrists and the ground on my ankle and have recorded some data into the provided LabScribe 3 software ...
1
vote
2answers
23 views

Enzymatic error rate

I am aware that each enzyme generate a certain amount of misproducts. This is well documented, for example, for the DNA polymerase. I am interested in enzyme involved in biochemical processes, so for ...
0
votes
0answers
18 views

Insomnia & Bowel Movements [on hold]

Serious question, first of all. I've had sleeping issues most of my life so I pay pretty close attention to my sleep/daily living patterns to see where I can improve my sleep. I've noticed that on ...
2
votes
1answer
61 views

How do Streptococcus thermophilus and Lactobacillus bulgaricus precipitate the curd of swiss cheese?

I learned in my food microbiology class that Streptococcus thermophilus and Lactobacillus bulgaricus precipitate the curd of swiss cheese. However, I was wondering what type of mechanisms do these ...
-3
votes
1answer
38 views

How far can we go in engineering our own evolution? [on hold]

After recently seeing Christopher Nolan's Interstellar and reading Kip Thorne's The Science of Interstellar, I've seriously been reflecting on the challenges mankind faces in becoming space pioneers, ...
0
votes
1answer
19 views

How does the Pectoralis Major work when doing a bench press?

Disclaimer, I'm not a biology undergrad and I only know the basics about muscle movement. I know that doing a bench press works the chest, and specifically the Pectoralis Major because, well, I feel ...
1
vote
1answer
98 views

Arm at Heart Level when Measuring Blood Pressure

How come that one's arm has to be at heart level so that the blood pressure can be measured accurately. I've tried researching this question, but most answers to it were just "if the arm is above the ...
14
votes
2answers
2k views

Is any known plant magnetic?

Is there a plant (not a microscopic type but one that is visible to the naked eye) that has so much iron (or magnetite), cobalt, or nickel in its body that it can attract a magnet? In this case ...
0
votes
1answer
21 views

What does gene encoding receptor mean? [on hold]

What does gene encoding receptor mean? I know what each of these of these words separately, but cant identify the exact meaning of the complete phrase, I cant visualize. Please help me!
2
votes
2answers
208 views

How can we know or measure pain in animals?

Is there any standard way to know how much pain an animal feels when it gets hurt like when a bird loses it's wing or hen when killed etc. All pain sensation points? Hey I'm new to biology. :)
1
vote
2answers
28 views

What's keeping living species from rotting?

Why do only corpses of species rot and be eaten by bacteria? What is keeping us from rotting? Just like fruits, and foods we eat; meat and vegetables rot when left uneaten. Like food, corpses rot and ...
3
votes
1answer
21 views

Authority on Microbiological Definitions

Is there an authority on definitions for molecular microbiology concepts, like an IUPAC book for chemical definitions? The particular definition I am debating is chromatin. Some say it encompasses ...
1
vote
0answers
21 views

Can I use yogurt to prevent the growth of black mold?

I have a mold problem in my bathroom. There is a narrow groove between the top of my tub and the wall it is attached to where a black gunk repeatedly grows. I can shoot the material out with a spray ...
0
votes
0answers
6 views

choice of negative stains in general

I have isolated a large molecular complex whose integrity is very sensitive to increasing ionic strength and thus had to be prepared for EM using low ionic strength solutions. My goal is image this by ...
0
votes
1answer
24 views

Effects of lactic acid ingestion [on hold]

What would happen if I drink lactic acid? I use lactic acid to clean an espresso coffee machine and I wonder what injuries could occour drinking it.
0
votes
0answers
22 views

how to extract promoter regions given a TF binding site

I have constructed a PWM and want to test its accuracy. Scanning an entire chromosome (chr3, hg18) yields very high false positives (magnitudes higher than the true positives). Scanning the entire ...
0
votes
0answers
8 views

Reasons preirradiation of negatively stained and plastic embedded specimens with a low electron dose improve stability to electron irradiation

It is known that preirradiation of negatively stained and plastic embedded specimens with a low electron dose improves their stability to electron irradiation. But my question is why this occurs? ...
6
votes
3answers
96 views

Do both ends of a muscle contract?

I was under the impression that both ends of a muscle contract. For instance, the fibers of the biceps run parallel to the humerus so I thought they pulled toward the middle. But now I'm confused ...
0
votes
0answers
11 views

Demultiplexing symmetric PacBio reads

I have PacBio CCS.h5 and the corresponding fasta and fastq files and I would like to demultiplex them. Does anyone know of how this can be done in the absence of bas.h5 files. Thanks for your help! ...
4
votes
2answers
43 views

Lyonization vs Genetic Imprinting

Lyonization is the process in which there is inactivation of an X chromosome in females. This process is implicated in mosaic forms of turner's syndrome (in this case the altered ...
2
votes
1answer
23 views

Why is oxaloacetate made in the mitochondria?

I'm looking at the gluconeogenic pathway: Pyruvate is shuttled into the mitochondria from the cytosol, converted to oxaloacetate by pyruvate carboxylase, converted to malate which is then shuttled ...
6
votes
2answers
107 views

What does pain look like in wave form?

I am interested in understanding what "pain" and "hot/cold" look like, as far as waves signatures (signal processing) go. My general understanding of how pain (nociceptive pathways) and hot/cold ...
0
votes
0answers
11 views

How to increase contrast with only a top entry specimen holder

My question is: If my microscope had a top entry specimen holder, instead of a side entry holder, what additional option(s) should I have to increase the contrast with the same constraint that I only ...
3
votes
1answer
29 views

What is the purpose of narwals' tusks?

I've heard that narwals can grow their tusks up to 16 ft long. What do they need the tusk for? Hunting? Comunication?
0
votes
1answer
19 views

Which is a more profitable feature: codominant or a incomplete dominant feature [on hold]

If we want to have as much as possible red flowers, in which case we would be more successful: when the color of flower is a codominant or a incomplete dominant feature? We have only learned the ...
2
votes
1answer
26 views

DNA replacement: new species

This is a hypothetical question What would happen if the DNA of a prokaryote was replaced with the one of a prokaryote of another species, would the cell structures change and adapt to the new DNA ...
3
votes
1answer
85 views

Pros/cons: linear vs. circular DNA [duplicate]

Why did Eukaryotes evolve to have linear DNA and not circular like Prokaryotes? What are the pros and/or cons?
7
votes
2answers
98 views

A good textbook on GMO

I am interested in learning about GMO. The topic is so wrapped in controversy, that it's hard to find a good book that introduces the basic concepts involved. I went through various university ...
1
vote
2answers
30 views

Determination of a chemical compound in a non-homogeneous sample

This is a more generalized question of my other question here. I want to know if it is possible to determine a chemical compound in a non-homogeneous sample. I am asking this because we are aiming ...
0
votes
0answers
14 views

a question about negative stains

I have isolated a large molecular complex whose integrity is very sensitive to increasing ionic strength and thus had to be prepared for EM using low ionic strength solutions. My goal is image this by ...
3
votes
2answers
45 views

Can genetically engineering the DNA of a human zygote, make it a twin of another human in entirety?

My question is simple. If I wanted to make an exact twin of an individual, will genetically engineering the DNA of the zygote to match with the individual suffice?
3
votes
0answers
38 views

Is the six-layer cortex model of the mammalian cortex still the most accepted model?

I've been reading a bit about the different layers of the cerebral cortex and its clear that certainly not every region of the cortex has the same number of layers. Thus, the idea that every region ...
3
votes
1answer
23 views

Do Penicillin based antibiotics affect birth control?

I wasn't sure whether to ask this question on Biology or Chemistry Stack Exchange, since it is really biochemisty, but this is something that's been puzzling me. Most pharmacists (all that I've ...
-1
votes
1answer
37 views

A pretty physics question about Fourier transform of electron microscopy [closed]

In the power spectrum of the transform (the modulus of the Fourier transform), I observe peaks in intensity placed on a rectangular grid that are spaced 20 transform pixels apart in the x direction ...
3
votes
2answers
61 views

What does it mean to have different “metabolism”?

We hear talk of different body types, and that it is more difficult for certain people to lose weight than others. On the other hand, when my physician recommends that I lose weight, they say that it ...
11
votes
3answers
3k views

Superhuman eyesight

My ten year old son was reading car number plates that were too fast, too far away and at the wrong angle for any of us to read or even believe that it was possible for him to read. We thought he was ...
1
vote
0answers
33 views

If you are God, how would you create an efficient priming reaction? [closed]

Imagine that you are “natural selection” (or God if you prefer) and you can reconstitute replication changing the concentrations or the properties (higher/lower activity; reactivity; etc.) of the ...
3
votes
1answer
19 views

IPTG and lac operator with e coli for foreign gene question

We did an experiment were we have e coli with a plasmid with a gene from another bacteria in it, and we put in IPTG in for induction. Will after looking up more about IPTG online I see it's related to ...
7
votes
1answer
77 views
+150

What creates the feeling of 'excess' blood pressure to an area of the body?

If I hang upside down, and feel blood rushing to my head, what structures are actually responsible for me "feeling" this excess flow of blood? Baroreceptors? Mechanoreceptors? Something else? ...
5
votes
2answers
61 views

Why are there no artificial wombs yet?

If the conditions within the womb are mimicked, and proper amniotic fluid with constantly recycling nutrients is maintained, is it not possible to obtain an artificial womb? Is there anything missing? ...
4
votes
2answers
62 views

What is called the “area size that an animal usually lives in”?

What is called the "area size that an animal usually lives in" or "needs for a normal life"? Is there any specific term?
3
votes
1answer
26 views

What is an auditory upward sweep?

I was reading an article in nature communications, when I came across this sentence: "The ‘match’ rule was indicated by either a blue circle or a auditory upward sweep".So I tried googling what was an ...
4
votes
0answers
36 views

What is the difference between organelle membranes?

Cells and organelles are contained in lipid bilayers. I'm particularly interested in eukaryotic organelle bilayers and the biophysicochemical differences between them. Many papers assume a ...
3
votes
1answer
30 views

Is using Hidden Markov Models to find homologues sensible in abstract, short sequences?

HMM alignment tools like hhpred excel at finding subtle homologues of folded proteins that simpler scoring techniques (such those used in BLAST algorithms) would miss. I am only looking at a small ...

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