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Water activity

water activity

(Science: chemistry) An expression of the relative availability of water in a substance. Pure water has an water activity of 1.000. The water activity of a solution is one-hundredth its relative humidity.


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Re: Diversifying selection

... in the strata that honest interpretation can see as catastrophic water and rapid massive movement of sediments--not caused by oceanic activity but abundant fast moving water)--- and if there was a man who built an ark, as many ...

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by AFJ
Sun Jul 12, 2009 1:33 pm
 
Forum: Evolution
Topic: Diversifying selection
Replies: 15
Views: 438

Re: Ligation and expression trouble

... ratio. Also make sure to resuspend the insert in 30 microliters of water when you gel-extract it (and not in 50) to make it extra-concentrated. ... consider ordering the NEB high fidelity EcoRI, which has reduced star activity. 6. If you are doing the Kpn+Xba digestion in buffer 2 (as you should ...

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by MrMistery
Wed Jul 08, 2009 3:18 am
 
Forum: Molecular Biology
Topic: Ligation and expression trouble
Replies: 3
Views: 396

Optical density Q

... The solution had been prepared by dissolving 35mg of X in 50 ml of water. What is the molar extinction coefficient of X at 400nm? (mol. wt. ... (20% of the marks) (ii) Measurements of lactate dehydrogenase (LDH) activity were carried out on plasma from an adult patient admitted to hospital ...

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by monkey07
Mon Jun 01, 2009 4:34 pm
 
Forum: Molecular Biology
Topic: Optical density Q
Replies: 0
Views: 409

Re: Biology Hangman Game

Use this activity to check you understanding of water, solutions, suspensions, acids, and bases.

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by alexade
Wed Apr 29, 2009 12:38 pm
 
Forum: General Discussion
Topic: Biology Hangman Game
Replies: 572
Views: 45368

a bunch of semi simple questions

1. explain how polarity, density, and solvent properties make water a special molecule. 2. how does temperature effect enzyme activity and metabolic rate? 3. how does temperature effect the rate of diffusion 4. how does ...

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by heyimkatiegibson
Wed Mar 11, 2009 1:51 am
 
Forum: General Discussion
Topic: a bunch of semi simple questions
Replies: 2
Views: 463
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