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Hardness

Hardness

(Science: chemistry) total concentration of calcium and magnesium ions, expressed as the equivalent concentration (mg/L) of calcium carbonate.

hard water is water that contains lots of calcium carbonate and other minerals.


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Growth on metal pot?!

... I live. Of that, about 200-250 parts per million is dissolved sodium. The pH is about 7.8. We have very soft water, with less than one grain of hardness.

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by WillyTNo
Mon Jun 11, 2012 5:29 am
 
Forum: Microbiology
Topic: Growth on metal pot?!
Replies: 24
Views: 10164

Transport In Plants

... living cells. Xylem: Hard wall cells transport water and mineral nutrients Phloem: Relatively soft -walled cells transport organic nutrients "Hardness and softness" is a function of the amount of lignification and extractive content of the individual cell walls not there location in the ...

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by kika
Tue Aug 02, 2011 10:40 am
 
Forum: Botany Discussion
Topic: Transport In Plants
Replies: 3
Views: 10443

Odd question, don't shoot me plz :D

hard to say, because it's soft, so can you actually talk about hardness of muscles?

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by JackBean
Sat Oct 09, 2010 7:59 am
 
Forum: Human Biology
Topic: Odd question, don't shoot me plz :D
Replies: 1
Views: 1011

Odd question, don't shoot me plz :D

What is the mohs hardness of human muscle?

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by Wilddwarf
Fri Oct 08, 2010 10:28 pm
 
Forum: Human Biology
Topic: Odd question, don't shoot me plz :D
Replies: 1
Views: 1011

Re: Marine Invertebrates and Evolution

... (for obvious reasons) and hard-bodied creatures first arose in the water. The predecessors to these organisms would, at some point, fall below the hardness threshold for fossilization to be likely. Similarly, our record of fossil insects isn't nearly as complete as we'd like it to be. Should we ...

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by Lenoxus
Mon Apr 26, 2010 1:56 pm
 
Forum: Evolution
Topic: Marine Invertebrates and Evolution
Replies: 2
Views: 3033
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