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Crystal

Crystal

a solid of regular shape and, for a given compound, characteristic angles, formed when an element or compound solidifies slowly enough, as a result either of freezing from the liquid form or of precipitating out of solution, to allow the individual molecules to take up regular positions with respect to one another.

Origin: g. Krystallos, clear ice, crystal


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Re: cryogenics?

... live cells even if you store them without cryopreservants (or cryoprotectants). With animal cells, you need to add something that prevents ice crystal formation, the most common ones being DMSO and glycerol. Also, some small invertebraters such as tardigrada (water bears) use the sugar trehalose ...

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by biohazard
Tue Aug 18, 2009 5:58 am
 
Forum: General Discussion
Topic: cryogenics?
Replies: 3
Views: 55

Methods Identifying Unknown Bacteria?

... grown so you should know by then if it is aerobic or not. Then a group of selective media either prepared by hand or in a kit (Biomerieux API, BD crystal...) selected on the basis of the first observations. But my method works well too. I f you have the right equipment. Might be faster too.

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by canalon
Wed Jul 22, 2009 4:27 pm
 
Forum: Microbiology
Topic: Methods Identifying Unknown Bacteria?
Replies: 5
Views: 224

Re:

... was life, molecular forces (bonding, polar) were already self-assembling large quantities of simple cell membranes (vesicles)[2] and numerous crystal designs that like snowflakes self-assemble when environmental conditions are favorable includes DNA, RNA, to increasingly complex designs where ...

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by GaryGaulin
Sat Apr 11, 2009 1:58 am
 
Forum: General Discussion
Topic: Intelligent Design?
Replies: 27
Views: 2317

Re:

... not need to get involved in. Anyhow, I stand corrected. Is this better? "Trilobites (extinct arthropods) are known to have had well developed crystal lens compound eyes of modern insects." I have to thank you for pointing that out. The Cambrian Explosion section is the newest. It's less ...

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by GaryGaulin
Wed Apr 08, 2009 10:39 pm
 
Forum: General Discussion
Topic: Intelligent Design?
Replies: 27
Views: 2317

Re: Borax Crystals

I think what you are asking, then, is how do crystals form. The physics of crystal formation is essentially the same, whether you're talking about borax crystals in a classroom, or mineral crystallization in molten rock, or stalagmite/stalagtite ...

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by blcr11
Wed Apr 01, 2009 3:05 pm
 
Forum: General Discussion
Topic: Borax Crystals
Replies: 2
Views: 846
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