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Water

Definition

noun

1. (chemistry) a chemical substance, with chemical formula H2O, that is clear, colorless, oderless, and tasteless liquid that may also occur in various forms such as gas (water vapour) and solid (ice).

Water is regarded as the universal solvent primarily due to its chemical and physical properties. It is one of the substances essential to life. Biomolecules (DNA, proteins, polysaccharides, etc.) are dissolved in water. It is also one of the requirements for photosynthesis. Some of its properties are described as follows:

2. (chemistry) an aqueous solution of a substance, for example ammonia water, waste water

3. a body of water, like sea, rivers and lakes, and a naturally-occurring water like mineral water

4. amniotic fluid, as in the pregnant woman’s water breaks


verb

1. to pour water; to make wet

2. to provide with water; to irrigate

3. to dilute

3. to discharge fluid; (colloquial) to urinate

4. to fill the eyes with tears

5. to salivate in anticipation of food


Word origin: From Old English wæter, from Proto-Germanic *wat-, from heteroclitic r/n-stem Proto-Indo-European *wódr̥ (genitive *wednós (“‘of water’”)). Cognates include German Wasser, Dutch water, Irish uisce, Russian вода (voda), Latin unda and Lithuanain vanduo.


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Recommendations for Bacteria Detection?

I think you can use a hemocytometer to count the total bacteria present in the water. But it is difficult to count the motile bacteria hemocytometer. I suggest to use a disinfectant to kill the bacteria before counting.

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by josem
Fri Aug 01, 2014 7:30 pm
 
Forum: Microbiology
Topic: Recommendations for Bacteria Detection?
Replies: 1
Views: 347

Recommendations for Bacteria Detection?

... the right things. I am wondering what the best way to do a field test on, say, a lake or puddle, to check the number of bacteria present in the water. I'm not as interested in particular species as I am in obtaining some idea of "bacteria density" or parts per gram. I'm not sure if ...

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by lodestone25
Sun Jul 27, 2014 6:20 pm
 
Forum: Microbiology
Topic: Recommendations for Bacteria Detection?
Replies: 1
Views: 347

Trying to prove height increase...need help

... growth, or gene signaling from the articular cartilage/synovial joint. When the articular cartilage is loaded it results in the release of water upon deformation and perhaps cartilagenous signals trigger processes in the epiphysis.

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by MiniGolfer
Thu Jul 24, 2014 9:09 pm
 
Forum: General Discussion
Topic: Trying to prove height increase...need help
Replies: 2
Views: 252

drink water, orange juice or Cola before eating?

... for chronic kidney diseases. Drinking citrus juices is good for health, because it contains lot of vit C. I think if pH increased due drinking of water, there might be some sensing mechanism which ultimately lead to more acid production by parietal cells. Another possibility is that excess water ...

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by josem
Fri Jun 27, 2014 6:06 pm
 
Forum: Physiology
Topic: drink water, orange juice or Cola before eating?
Replies: 16
Views: 35657

Re: 2.5 M glycine crystallized

... Try gently warming the bottle and see if the crystals go back into solution. Leaving it on the countertop overnight might be enough. If not, a 37C water bath might work. Autoclaving is very likely to do the job -- be sure to use the liquid cycle. Solvent collisions can shake the molecules off the ...

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by jonmoulton
Fri Jun 20, 2014 2:45 pm
 
Forum: Molecular Biology
Topic: 2.5 M glycine crystallized
Replies: 1
Views: 456
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