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May
5
comment Proteins that give color (without fluorescence)
I was more referring to the link... The way I understand the question he is talking about a chromophore you can see with white light, not in the dark, maybe the OP should clarify...
May
5
comment Proteins that give color (without fluorescence)
@aandreev the OP says "something like GFP, but that we could see it without UV (not fluorescence)." so giving him information about GFP-related proteins does not really seem a good answer to me... My guess is he's after something like Bacteriorhodopsin which is purple (albeit I'm not sure it's a good idea to use it as a reporter...)
May
5
comment Proteins that give color (without fluorescence)
The question clearly specifies "that could be seen without fluorescence"
May
1
comment How can homosexuality evolve despite natural selection?
@Corvus OK, my previous comment didn't come out quite all right. What I mean is that thinking that every single thing in existence evolved for a reason implies evolution is finalistic. Certain things are just not selected against, despite not giving a clear evolutionary advantage. Penicillin resistance is a good example of a trait that was positively selected, but that does not mean (as many put it) that "the bacteria evolved the resistance because there were antibiotics around" (finalistic view), but rather that "some bacteria which happened to have the AmpR gene were more fit and expanded"
May
1
comment How can homosexuality evolve despite natural selection?
@corvus point is asking "why x evolved" implies the fact that evolution is somehow finalistic, which it is not.
Mar
19
comment How did birds become so intelligent?
You should really define what you mean by intelligent... for instance a dog can bring you the newspaper, which a bird can't do.
Mar
17
comment Why is hydrofluoric acid so dangerous if it is a weak acid?
Although the importance of that would depend on the reaction constants of those three reactions... do you by chance know what they are?
Feb
26
comment How can I reduce the background gradient in phase contrast microscopy?
Have you tried imaging an emptry slide and use it as background? (i.e. subtracting it from your image)
Jan
19
comment Multi-modal distribution for gene expression data
Could you expand please? Expression distribution over what? The same tissue? Same cell over time? Different tissues?
Dec
26
comment What does pain look like in wave form?
What is important is the sequence of action potentials. I would suggest reading about temporal coding and rate coding as a start. For instance a (very lightweight) introduction can be found on Wikipedia: en.wikipedia.org/wiki/Neural_coding Also, note that much of it is how we INTERPRET a certain neuronal signal; our brain is easily fooled! For instance, when eating spicy food we perceive it as "hot", even if it is not at high temperature. This is because the receptors mediating the "hot" sensation are the same for spice and temperature.
Dec
26
comment Patch-Clamping Neurons Resources
@ChrisStronks well, the question is on hold now...
Sep
11
comment Why do I only breathe out of one nostril?
hmmmm.... I don't really buy the smell part. The nasal cycle lasts 2-3 hour, which seems to long to account for desensitization to smell...
Aug
29
comment Life without DNA?
Also: ncbi.nlm.nih.gov/pubmed/22798070
Aug
29
comment Life without DNA?
@woliveirajr the original papers can be found here: GFAJ-1 Is an Arsenate-Resistant, Phosphate-Dependent Organism and Absence of Detectable Arsenate in DNA from Arsenate-Grown GFAJ-1 Cells. However, I wouldn't go as far as saying they "debunked" the study, just gave better explanation for their results (i.e. applied the scientific method).
Jul
28
comment What kind of microscope for ML/biological research?
Although what you say is correct, remember that mounting, especially if using specific microscopy mounting media increases the quality of the image. See for instance: microbehunter.com/…
Jul
28
comment Is pork poisonous?
@WYSIWYG: good point. Taenia can be quite problematic especially in poor countries where it is more prevalent.
Jul
27
comment What kind of microscope for ML/biological research?
obviously there are many factors to consider. I wouldn't spend 2000 euros on a microscope if I just want to give it a try... better to start with a cheap one and see whether you like it, then move on if you really want to get serious. Unfortunately there are certain microscopes you just cannot afford to buy, but then get a job in an imaging lab if you want to play with those toys! It's lots of fun!
Jul
27
comment What kind of microscope for ML/biological research?
I have mixed feeling about this. Sure, you can see stuff with a small microscope, but sometimes you want crisper images than those you posted (and maybe with less fringing). But I am probably spoiled by using expensive scopes :P
Jul
27
comment What kind of microscope for ML/biological research?
Put it this way: if I come to you and ask "I am a biologist wanting to learn about ML. Should I learn about linear regression or about classification trees?". Surely you would reply "depends on what you want to do in the end". This is exactly the same situation :)
Jul
17
comment Beetroot white skin mould
To be honest, whichever the answer, better to stay on the safe side and throw it away.