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votes
0answers
4 views

To have TBE vaccine during allergic times with mild asthmatic symptoms?

My assistant says that if you have asthmatic symptoms you cannot have TBE vaccination, although you are living in the active zone of TBE. Cases mild allergic symptoms allergic symptoms under ...
1
vote
1answer
26 views

Number of autoregulation and FFL motifs in a network

Suppose we have a network with N* nodes (N* is the number of internal nodes). Every directed link in this network exists with probability p. What would be the number of: motifs that are ...
1
vote
0answers
7 views

Name of scientist who discovered lifesaving drug and chose not to patent it?

I recall reading about a 20th century scientist who made a life-saving drug that could have patented it and made millions. He chose not to and saved the lives of millions around the globe. I thought ...
5
votes
2answers
414 views

Species Identification - small insect: is this a bed bug?

I found this bug in my apartment in Chicago. We had bed bugs in our house the previous year (but we thought we got rid of them). This bug was very small - maybe 2 millimeters in length. These ...
1
vote
1answer
21 views

identification of this flower

I saw this flower in Pulau Ubin in Singapore. Can anyone identify the species of this flower? Thanks in advance!
1
vote
1answer
21 views

identification of species of tree

I just want to confirm the species of the tree in the middle of the picture. Is it the "Flame of the Forest"? This is taken in my school campus. Thanks in advance!
1
vote
0answers
9 views

Relationship between small and large fast-twitch motor units

When large fast-twitch motor units are temporarily fatigued, non-fatigue small motor units in the same muscle are impaired for small delicate tasks. Why? When impulses from the brain comes down, the ...
0
votes
0answers
5 views

Neuroscience:Spinal tract

I have few confusions finding the answer for the questions below. I have tried answering the first two But i am not sure if it is right or not? And i do not know about the third one? 1.in which ...
0
votes
0answers
6 views

Can paralogous genes be under negative selection?

I have just aligned 9 paralogous genes from human, uploaded them into MEGA and calculated negative selection. Can there be negative selection acting in between paralogous genes? Or how should I ...
2
votes
0answers
36 views

How Sex Evolved ? and when?

As I know evolution comes bit by bit mutation by mutation How sex evolved which requires a major change in at least two individuals one to become male and one to become female ? When that happened ...
1
vote
1answer
21 views

Measurement of glucose concentration in the human brain

If I want to measure the exact glucose concentration in a human brain then how can I proceed to do that? Is there any technique or assay to do that?
0
votes
0answers
9 views

What is the distribution of agent on plasma proteins in ECF?

I am studying Montelukast here: Montelukast is more than 99% bound to plasma proteins. The steady state volume of distribution of montelukast averages 8 to 11 liters. Studies in rats with ...
1
vote
0answers
9 views

Source of information on the evolution of aging/senescence

Do you know a good review (published peer-reviewed or an online course or whatever) that offers a good overview of all hypothesis explaining the various patterns linked with aging? I'd like this ...
2
votes
1answer
257 views

Advantage of being deuterostome

We know that most of the so called "Advanced" organisms are deuterostomes (i.e., development of gut starts from anus). Is there any evolutionary advantage of that? If not, why and how did it evolve?
0
votes
1answer
19 views

How to increase the rate of absorption and assimilation of food? [on hold]

i was reading this and want to know excerpt from the above link...
2
votes
1answer
23 views

How to interpret the breeders equation?

The univariate breeders equation is defined as, $\ R = h^2 s$ where $\ R $ is the response, $\ h^2 $ is the heritability (additive genetic variation), $\ s $ is the selection differential. The ...
1
vote
0answers
22 views

identification of species of this bird

Hi I saw this bird near my school canteen in Singapore in Spring. Can anyone identify the species of this bird? Thanks in advance!
1
vote
1answer
17 views

fibrinogens and fibrins - are they the same molecule?

Some proteins are "activated", like fibrinogens; they are turned into fibrins by thrombins, and then the fibrins can aid in blood clotting. Are fibrinogens and fibrins the same molecule, just in ...
4
votes
0answers
70 views

Model for fluctuating selection

Is there any mathematical model to predict the behaviour and long-term consequence of counter-acting selection at different time scale? For example, let's consider the bi-allelic gene $A$, with ...
1
vote
2answers
37 views

How to determine whether the energy of a stem-loop fold is significant or not?

If I have a predicted RNA stem-loop of energy -0.30 kcal/mol, and another of -4.9 kcal/mol, how do I tell whether such a structure is a significantly stable structure or not? Our two competing ...
4
votes
0answers
43 views

Selection on linked loci in a diploid population

Let’s consider two linked loci $A$ and $B$ that are both bi-allelic. In consequence, we have four different possible haplotypes $A_1B_1$, $A_1B_2$, $A_2B_1$, $A_2B_2$, which frequencies are $X_1$, ...
4
votes
0answers
40 views

Effective population size and overlapping generations

From this book; If generations overlap, then the effective population size $N_e$ does not equal the population size $N$. I know mathematical formulations in order to find the effective population ...
0
votes
0answers
39 views

Effect of natural selection on phenotypic variance

Short background Theoretically speaking, natural selection causes a decrease in genetic variance and because the environmental variance should remain unchanged, natural selection causes a decrease of ...
1
vote
0answers
40 views

How to maximize lung oxygen intake?

What method of breathing provides a sudden surge of oxygen into the lungs filling it as full as possible in volume and density. Deep breaths? Shallow breaths? Breaths taken while bent over? Deep ...
1
vote
2answers
275 views

Why aren't we allowed to refreeze previously thawed breastmilk in refrigerator?

https://www.breastfeeding.asn.au/bf-info/breastfeeding-and-work/expressing-and-storing-breastmilk Previously frozen— thawed in refrigerator but not warmed 4 hours or less (ie the next ...
1
vote
0answers
11 views

Why is post-vaccination fever for 4CMenB so high?

When considering the introduction of 4CMenB vaccine, the Joint Committee on Vaccination and Immunisation said: The sub-committee noted that the clinical trials data suggest that when 4CMenB ...
1
vote
1answer
26 views

identification of species of snake

Can anyone identify this colorful snake found at Pulau Ubin in Singapore? Thanks in advance!
0
votes
2answers
36 views

Which types of hydrogen bonds are known to exist in RNA secondary structures?

I'm programming an implementation of an algorithm for pattern matching in RNA structures. The algorithm assumes the following types of base pairs: Plain: No base pairs (just the primary structure of ...
0
votes
1answer
17 views

is there a way to do batch download for all gene pathways?

I would like to download all the gene pathways and genes of each pathway. Preferably, gene length of each gene as well. It would be a lot more convenient if there is an R package.
1
vote
1answer
31 views

Do cell walls prevent cancer?

To my knowledge plants do not have an uncontrolled growth disease similar to cancer. Is the function by which they avoid uncontrolled growth related to their cell wall and preventing damage to ...
0
votes
0answers
20 views

occurence of interesting phenomenon

I was strolling along the mangrove area along Berlayer Creek in Singapore, when I saw this interesting phenomenon. The left side of picture shows some bricks which seem to connect the ground to the ...
1
vote
2answers
29 views

Could humans theoretically see infrared better than regular light?

I have noticed that in infrared film, people's eyes reflect that light within their eyes much like nocturnal animals (and many other animals for that matter) do with regular light. I know that this is ...
1
vote
1answer
104 views

Heterozygosity and overdominance

Consider $m$ loci with heterozygote advantage (overdominance) such that the fitness of the two homozygotes is $1-\frac{s}{2}$ and the fitness of the heterozygotes is $1+\frac{s}{2}$, where $s>0$. ...
2
votes
2answers
29 views

Why basement membrane thickens in diabetes mellitus?

Untreated diabetes mellitus may lead to blindness and kidney failure because the basement membrane of small blood vessels in these organs thickens due to increased production of collagen and laminin. ...
0
votes
1answer
24 views

What nutrients do I lose in the water when I boil vegetables?

What nutrients do I lose in the water when I boil vegetables. Has to be some water-soluble and heat labile ones right? Which ones?
1
vote
0answers
14 views

What is the nature of action potentials in autonomic nervous system?

My conjuncture is that the natures of sympathetic and parasympathetic action potentials are different. My findings propose me that sympathetic action potential is little longer lasting than ...
0
votes
1answer
13 views

Specifics of decussation

Beginner question here: The definition of decussation I see is the crossing through the midline of a bunch of neurons. But I was wondering if there was a little more to it than this, because I'm ...
2
votes
1answer
37 views

How is the transcription direction of RNA polymerase determined?

When transcription factors attach to the DNA strand - How do they know in which direction they have to initialize the transcription by rna polymerase? Is it always read in the same direction anyway? ...
0
votes
2answers
39 views

How does cold water help to overcome high fever?

Why cold water helps to overcome from high fever in body? As fever is inside the body and we're applying cold water over the body!
1
vote
2answers
37 views

Why is it that drinking caffeinated tea does not help one to stay awake?

I have never felt after drinking tea that I can have the power of being able to work late at night. Neither have I felt that it helps me to be awake while working or keeping eyes opened while I am not ...
1
vote
1answer
40 views

What kind of small insect is this?

Found in central florida in the bath tub. Its about the size of a pencil marking, very small. What is it?
9
votes
2answers
126 views

Does artificial high intensity light damage permanently dark ecosystems?

Popular science features on wildlife typically capture camera images using natural light, or high-speed exposures. This is not possible where the ambient light is extremely poor. E.g. Caves, Undersea ...
2
votes
1answer
21 views

Why do oranges in the US have a small separate part?

Why do oranges in the US have a small separate detachable part at the tip which is separate from the other pods? It looks like a tiny orange itself and has a long fiber attached to it.
2
votes
1answer
28 views

How are oranges in the US or anywhere made seedless?

How are oranges in the US or anywhere made seedless? Please explain the broad principles and not the technicalities.
0
votes
0answers
8 views

Degenerate primer design for DIG in situ hybridization

New to molecular and have learned to design primers from google/youtube so any info would help Would someone be willing to share their protocol for degenerate primer design? Breakdown: Trying to ...
6
votes
1answer
75 views

What are the costs associated with carrying lots of genetic material

What are the costs (if any) associated with carrying lots of genetic material? energy for copying? raw material for copying? space in the cell? Maintenance cost (matter and energy)? time to copy is ...
-1
votes
1answer
27 views

Can human survive falling from 30 000ft without chute

What are the chances of survive if one landed in the water?
1
vote
1answer
37 views

What is the minimum air pressure the human body can tolerate if oxygen supply is not an issue?

Disregarding hypoxia, what is the minimum air pressure that the human body can tolerate? (i.e. at what air pressure would the blood start to boil, or skin start to burst, or whatever else might ...
0
votes
0answers
15 views

What is the outcome of DMX ativan voice study? [on hold]

I'm looking for the results of Dextromethorphan to Treat Patients With Voice Spasms but I can't find it could someone help me? It was going to use DMX and ativan to treat hoarseness.
2
votes
1answer
57 views

Average face shape

I am doing face detection application where every face detected is inside a rectangle. The rectangle always contains some background behind the face and now I need to extract as much of the face as ...

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