Newest Questions
29,290 questions
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Eye floaters in the eye ? How do they shape?
Recently doctors said that you have some lipid thing in your vitreous which resulted in eye-floaters
Now I want to know what are these lipid things doing in my eyes ? I mean how do they get there ?
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Visual perception of humans in the brain
Why we get much of our brain information through vision ? I mean is there any specific selection pressure ? Might be the same for other animals .
Why not other senses like smelling ,…
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Is oxido-reduction necessary for all possible forms of life?
Can any life anywhere exist without using oxido-reduction reactions?
If no, does that mean that all life must use ATP or an equivalent mechanism in order to make use of the generated energy?
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16S Libraries With Non-Purified Short Fragments
this is not the first time I’ve encountered this issue during the preparation of 16S libraries (Illumina protocol: “16S Metagenomic Sequencing Library Preparation”), so I’d like to take the ...
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What concentration of alcohol (and/or) exposure time would be required to make contaminated water safe to drink or would inhibit bacterial growth?
QUESTIONS
What concentration of alcohol (and/or) exposure time would be required to make contaminated water (e.g. with cholera) safe to drink?
What concentration of alcohol would be required to ...
3
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1
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282
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Who puts glitter on their chrysalis? And how is it produced?
Hiking in a low elevation area in Hsinchu county Taiwan in late April something sparkly under a leaf caught my eye as I walked by. Upon investigating, I found a 20 x 9 mm very bright green chrysalis ...
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Is there a cell that produces a hormone that acts on the same type of cell
In the human body, does there exist a cell that can produce a hormone, such that the receptor of that hormone is on that cell?
Normally, hormones are produced by endocrine glands, and they affect the ...
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How to explain this difference in the type of cytokine produced by helper T cells due to the way of infection?
Several rats were divided into two groups $A$ and $B$. The rats in group $A$ had staphylococcus aureus daubed on their ears, while the rats in group $B$ had staphylococcus aureus injected into their ...
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Why is vitamin D so important for calcium regulation? [duplicate]
I get how it effects calcium absorption in intestinal and renal epithelium, and calcium deposition in the bone matrix, and am not asking for the mechanism of action. My question is why did the body ...
3
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1
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351
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How does the Donnan effect generate an electrical potential?
I've been trying to study the Donnan equilibrium, and so far everything is clear except this: everywhere I've looked says the Donnan equilibrium maintains electroneutrality in both compartments. Yet, ...
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Does boiling distilled water in copper ware make it safe for drinking? [closed]
I'm making custom water for coffee, with varying levels of total hardness, and carbonate hardness.
The water I'm using is 4-times deionized distilled water with near 0 TDS, but with warning on the box ...
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Do gene conversion events occur in recombinant strands that result from Holliday junctions resolved by opposite plane cuts?
Most articles or books I have read about gene conversion explain the mechanism of gene conversion by how the cuts resolve Holliday junction. For example according to this book, "Molecular ...
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Is there any case where dual expression of two separate recessively lethal genes leads to rescue?
I’m wondering if there are any known examples—either natural or synthetic—where two separate genes each have recessive alleles that are individually lethal, but when both genes are mutated ...
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Which kind of bug is this? I only see it come from this table and nowhere else
This bug always comes from somewhere within the table. They appear any time of the day. I have not seen them in any other furniture or even on the floor, just on this table.
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What causes my shiitake blocks to shrink in size while inside their bags?
I have been growing mushrooms for years using sawdust and mycelium in a plastic bag.
I've noticed after several weeks the 'block' of shiitake mycelium and sawdust will change from something wedged ...
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