November 21

DNA Models

I need to make a DNA model for a project, what would be the most cost effective yet original things i could use to make it?

THANKS!!!

Plasticine may also work for you ! --Pupunwiki 03:05, 22 November 2006 (UTC)

Better Bio Gas Yeild?

I would like to know the yields of bio gas by anaerobic digestion of Food Wastes(fruit juice,Souce & Jam industry waste) Vs. Brewery industry waste (using malt)...?? Need methane to CO2 ratios (Approximate values) in both cases...!!

Thank You... Malinda

Picture permissions

if I would like to use the figure (not text) on page "endothelium" in a PHD thesis how do ask for permission ?

Fridge mice

Am I completely insane, or do I remember seeing a nature documentary years ago, about some mice which had evolved adaptations to living inside the giant freezers at meat processing plants? It had much longer hair than normal mice and walked on tiptoes to reduce heat loss.

composition of pH buffers?

What is the composition of the pH buffers used to caliberate the pH meters(pH4.0,pH7.o,pH9.2)? why are these specific buffers used and are there any alternatives?

Conductivity

How can I order these compunds in order of conductivity? CoCl3*6(NH3) PtCl2*4(NH3) RhCl3*5(NH3) CrCl3*4(NH3) Thanks!

Cheap helium

First of all, let me say I'm definitely not planning to go cluster ballooning without the necessary training and experience, because that would be foolish and dangerous. That said, where can I get lots of pressurized helium for a reasonable price? I'm talking like 20 kilograms of helium here. Is there any way I can get that much for a few hundred dollars? It's okay if I have to return the cylinders. 128.186.232.32 20:11, 21 November 2006 (UTC)

The Black Sea

my science teacher was talking about the black sea and she would give any extra credit to who found out why it go its name I want to know if you can tell me if the Black Sea got its name from black cyanobacteria or if it got its name from something else?? please help!!

i could care less can you tell me

The expression is " couldn't care less". If you "could care less", that means you must care, at least a bit. This is perhaps the most misused expression by kids today. StuRat 01:41, 22 November 2006 (UTC)

• stares* just give the guy an answer, how hard can it be? It's a hw question but there's no need to BITE even if the person's being a little rude. " The motive for the name may be an ancient assignment of colors to the direction of the compass, black referring to the north, and red referring to the south.......Another possible explanation comes from the color of the Black Sea's deep waters. Being further north than the Mediterranean Sea and much less saline, the microalgae concentration is much more rich, hence the dark color. " (from Black Sea) -- `/aksha 03:51, 22 November 2006 (UTC)

Polarization filters

I was wondering if there's any way I could make a polarizing filter myself (or get it for free!). I live in the middle of a technological nowhere in Brazil, so this stuff is hard - if not impossible - to find around here. Filters for cameras are very expensive, and won't work with what I want (they need to be flexible and easy to cut in any shape)

The thing is, whenever I get my hands in some electronic junk with a LCD screen, I remove their LCD screens and take the polarizing filters on them. They are little, flexible pieces of plastic, exactly the kind of material I want. The problem is that they are never big enough (I need at least one 10cm x 10cm piece).

Is there any way I could fabricate this material myself? Or is there any place I could get such a thing for a reasonable price? (or even for free - as a free sample and such?)

Thanks for any help. ☢ Ҡ i ∊ ff ⌇ ↯ 22:08, 21 November 2006 (UTC)

Psychologist

Say I had a psychological problem, how would I go about finding a therapist for me? X 22:38, 21 November 2006 (UTC)

coordination compounds

What would the possible isomers of Co ³⁺ coordinated to the tridentate ligand DETA be? I'm more interested in the geometric isomers, but would there be optical isomers as well? I'm most interested in structure... would there be trans and cis for these? Thanks ~ Mike 130.207.180.50 23:14, 21 November 2006 (UTC)

N3 N2 | n1 \ | / Co + mirror image / | \ N1 | n2 n3

N3 N2 | n2 \ | / Co + mirror image / | \ N1 | n3 n1

OOPS DID YOU SPOT MY DELIBERATE MISTAKE - the image below is the mirror image of the one above.. Actually not deliberate - just a mistake.87.102.36.82

N3 N2 | n3 \ | / Co + mirror image IGNORE THIS / | \ N1 | n1 n2

also non chiral:

n3 N2 | N3 \ | / Co / | \ N1 | n1 n2

Maybe there are others - again this is assuming only octahedral mononuclear complexs are formed...So it is a simplification87.102.36.82 13:35, 22 November 2006 (UTC)

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