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Jan
27
comment Vitamin E Production and Sun Light
Vitamin E has nothing to do with sunlight.
Jan
25
comment Making mistakes in the laboratory
@Kendall that link has saved me countless hours in the lab :)
Jan
25
comment Panel 9 urine/ prescribed ADDERRALL XR
A lab result is a lab result. If there is a substance in your system and the lab is testing for it, the test will be positive, regardless of the medical reasons for why the substance is present. If you are worried about the interpretation of the test by a third party (say, for example, a drug test before being offered a new job), you'll need to work with your physician to draft a letter explaining there is a medical reason for having the substance in your system.
Jan
24
comment Does a gene that regulates itself necessarily be a transcription factor?
There is no one answer to this question. Some non-TF proteins signal through negative feedback loops to eventually downregulate their expression when they're no longer needed/there is a lack of substrate/etc. Others don't, and are regulated through other means.
Jan
23
comment How do Binaural Beats Work?
That looks better, thanks
Jan
23
comment How do Binaural Beats Work?
as I asked previously, what exactly don't you understand? Please add additional detail to your question to state what you know, and what specifically you need more information on. Also, I strongly suggest reading through the references in the wiki article, as they likely have much more detail than the article itself.
Jan
23
comment How do Binaural Beats Work?
Have you read the Wikipedia article? What exactly don't you understand?
Jan
23
comment What are the determinants of tumor metastasis
You might also want to read about the epithelial-mesenchymal transition as an initiator of metastasis.
Jan
23
comment Why do Major and Minor grooves exist in dna strands?
Please edit your question and explain what you have learned so far, and where exactly you're stuck. As it stands now, this question is too broad.
Jan
19
comment Why is exocrinous pancreatic cancer so lethal when compared to others?
One of the (but not the only) reasons for the high mortality rate of pancreatic cancer is the fact that it is so difficult to screen for. The symptoms (if any) are most often dismissed as general back or gut pain, and it can take quite a bit of testing before the true cause is found, by which time the cancer has already become metastatic. Unlike the digestive system, there is no good non-invasive way to image the pancreas (such as with a colonoscopy for colon/rectal cancer) except using radiological methods such as X-rays, so there is no safe way to provide for standard screenings.
Jan
19
comment Assays to determine competitive binding versus non-competitive
Can you please describe your setup in a little more detail? Are your ligands small molecules, proteins, or something else? Do you have the purified target protein? Is it a receptor or some other kind of enzyme? Has anyone worked with it in the literature before?
Jan
15
comment Can a hormone be absorbed into the body digestively?
Yes, some hormones can be absorbed from the digestive tract. Birth control pills are a perfect example.
Jan
14
comment What makes animal to continually reproduce?
Life begets life. If organisms didn't reproduce, their species would die out. Simple as that.
Jan
14
comment SDS-Page-Concentration confusion
Run around 4-5 ug per lane to start with, then adjust as necessary.
Jan
13
comment Where can I find FDist2 executable?
Well, I'm avoiding a lot of "nerd" details. I think the command gcc will work from the command line once the proper tools are installed (@Remi.b, make sure you run XCode first!). The problem I'm running into currently is that the files aren't compiling. Remi will need to find a C expert, I think....
Jan
13
comment Where can I find FDist2 executable?
OS X doesn't come with a compiler by default, but if you install XCode and the command-line tools, you'll get clang, which works (in this case) very much in the same manner.
Jan
12
comment Xylem Properties
I'd suggest reading about capillary action. The article is a bit technical in places, but what part of it boils down to is the narrower the capillary (up to a certain point), the stronger the effect and so the water column can go higher.
Jan
10
comment Which steps occur in each phase of Meiosis and Mitosis
Please limit yourself to one question per post.
Jan
10
comment how to calculate dilution factor and CFU
Do you know what CFU stands for?
Jan
10
comment What are the minimum conditions required for “open-ended evolution”?
@vonjd Please read Why is voting important?, especially the last paragraph. Additionally, mouse over the vote buttons on both questions and answers and read the tooltips that pop up. Voters are under absolutely no obligation whatsoever to explain their votes if they don't want to, instead relying on the tooltips to do the explaining for them. They may also comment and/or edit with improvements, if such a thing is possible and they have the volition. Demanding explanations for every downvote is not a generally-accepted practice.