Recent content by aroc91

This thread is coming up on being three years old.

Incorrect. There doesn't need to be a covalent bond for DNA to match up with the opposite strand or the various RNAs. Anything but TACCATGC wouldn't fit correctly opposite to ATGGTACG. Chemistry covers non-covalent interactions.

They're already beyond mere imagination, though I haven't seen anything more recent on the topic. http://www.nature.com/nature/journal/v459/n7243/full/nature07971.html

A small bit of dissolved oxygen is present in the plasma, but it's dwarfed by the amount in hemoglobin.

Thanks, Greg.

I'm going to err on the side of caution for the time being, given PF's rules on solicitation and advertising, until I hear something from Greg or one of the mods, but I'll keep you in mind.

Thanks. I have a few unknowns too, so I think I'm going to give the local university chem department a holler and see if they can offer some assistance. Their budget's probably more in line with what I've got too. Something tells me my high school doesn't want 10 kilos of erbium oxide... haha.

Hi all. I recently came into the possession of a fair amount of various chemicals in various amounts. It's not anything outrageous (mostly a lot of ionic silver and lutetium compounds), so eBay would accept it, but I was just wondering if there was a better alternative.

The velocity subheading of the blood flow Wiki gives a few examples of areas where cross section and velocity are drastically different. You're probably aware that blood pressure is significantly lower in capillaries than in the aorta. However, multiply their given values and you'll see that...

Mean and [arithmetic] average are the same thing. Where are you getting "highest minus lowest" from? That's not any form of averaging as far as I know. If you take the average of 100 and 1 with that method, it comes out to 99, which doesn't make any sense.

I'm not too keen on developmental biology, but as far as I know, there's a gross anatomical factor as well as well as the neural that's already been discussed - spine curvature - which isn't developed until walking age. An infant's spine starts out convex and eventually develops the lumbar and...

There can be cases in which consumer biomass is greater than producer biomass, but it's only a temporary situation. If producers are killed off, consumers will decline in population as a response because they won't have as much food to support them.

Have you run statistical analysis on the fluorescence values? Is it statistically significant decrease? Can you provide the raw data? It could just be normal variance or noise that you're interpreting as a decrease.

This one is 270 +/- 10 mOsm/L. I'm not sure why, but there's a bit of variance in human cell culture medias. I found a couple examples of stem cell cultures that ranged from 292 up to 340. In any case, you should have the literature on your specific media or you can contact the manufacturer...

X inactivation in cats is similar in this regard.