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Sodium

sodium

(Science: Chemistry, element) Sodium is a soft, silvery, highly reactive alkali metal which has an atomic number of 11 and an atomic weight of 22.990. It is most commonly found in the form of salt, sodium chloride (NaCl).

It was first identified as an element by the english scientist Sir Humphrey Davy in 1807. Sodium chloride is a critical nutrient in humans (it plays an important role in nerve function), but too much of it can cause health problems such as aggravating high blood pressure.

pure metallic sodium is a fire hazard, and it can explode if it comes into contact with water. Other commonly used sodium compounds include soda ash (sodium carbonate, Na2CO3), baking soda (sodium bicarbonate, NaHCO3) and caustic soda (sodium hydroxide, NaOH).

Abbreviation: Na


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Re: blank and substrate control give OD reads

... to harvest the enzyme 4) distribute substrate (pre-treated kenaf) equally to 96 deep well plate 5) add 250ul enzyme (from step 3) + 250ul sodium acetate into the substrate 6) incubate @ 50oC, 4hrs in waterbath 7) centrifuge to sediment the substrate 8) pipet 100ul reaction solution and ...

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by intandiana
Sun Jan 19, 2014 5:57 am
 
Forum: Molecular Biology
Topic: blank and substrate control give OD reads
Replies: 9
Views: 3401

Re: blank and substrate control give OD reads

... and comparing against water at wavelengths near your OD measurement. Dear jonmoulton, thanks for your reply. >>>my buffer is sodium acetate pH 5.0. I'll compare it against water.

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by intandiana
Sat Jan 18, 2014 8:39 am
 
Forum: Molecular Biology
Topic: blank and substrate control give OD reads
Replies: 9
Views: 3401

blank and substrate control give OD reads

... the better variant than the wild type in hydrolysis kenaf. the reaction is done in 96 deep well plate by adding substrate (kenaf) + buffer (50mM sodium acetate, pH 5.0) + enzyme solution and incubate for 4 hours in waterbath. after 4hrs incubation, the reaction is centrifuged to collect only ...

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by intandiana
Wed Jan 15, 2014 7:21 am
 
Forum: Molecular Biology
Topic: blank and substrate control give OD reads
Replies: 9
Views: 3401

Too many ions inside a neuron cell. What happens?

For example, there are diseases where the sodium channel cannot gauge voltage difference effectively, and so it remains open, rapidly building up a concentration of sodium ions in the cell, and this disorder often affects potassium channels, so ...

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by Coelacanth
Tue Dec 03, 2013 1:34 am
 
Forum: General Discussion
Topic: Too many ions inside a neuron cell. What happens?
Replies: 1
Views: 1274

List of enterohepatically cycled nutrients?

... together so far from reading various articles online. Unfortunately, the question marks are what I most want to know. 61% Bile salts: (29% sodium 21% chloride 8% bicarbonate 1.6% potassium) 12% Fatty acids 9% Cholesterol 7% Proteins 5% OTHER ?% copper ?% chromium ?% iron ?% zinc ?% ...

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by lourat
Sat Nov 09, 2013 6:18 am
 
Forum: Human Biology
Topic: List of enterohepatically cycled nutrients?
Replies: 0
Views: 1107
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