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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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Identifying unknown

... finding somewhere to start. I have quite a bit of information. Colonies are cream colored. It is gram positive. It grew at high concentrations of sodium chloride (.5%,2%,%5,20%). It grew at 4 degree celsius and 25 degree celsius. Citrate test positive, it grew only at a 7pH. Grew on plates with ...

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by mccullyj
Fri Apr 24, 2009 10:22 pm
 
Forum: Microbiology
Topic: Identifying unknown
Replies: 1
Views: 272

urinary system question.

... into the blood. Would you expect the Cl- concentration to decrease as fluids are extracted along the nephron? Does chlroide not simply follow sodium from the nephron to the peritubular capillary? And aren't fluids drawn by the sodium and chloride being transported?

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by shilling99
Fri Apr 24, 2009 12:47 am
 
Forum: Human Biology
Topic: urinary system question.
Replies: 3
Views: 749

Homework, read before you post

... into the blood. Would you expect the Cl- concentration to decrease as fluids are extracted along the nephron? Does chlroide not simply follow sodium from the nephron to the peritubular capillary? And aren't fluids drawn by the sodium and chloride being transported?

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by shilling99
Fri Apr 24, 2009 12:16 am
 
Forum:
Topic: Homework, read before you post
Replies: 9
Views: 9177

controling Nerve of the Brain? Which One

... the body and put in a bowl of nutritive serum. This is due to special self-depolarizing cells called pacemaker cells, and particularly to special sodium channels in the plasma membrane of these cells referred to as I-f (funny) channels. the molecular mechanisms are indeed fascinating, but not ...

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by MrMistery
Mon Feb 16, 2009 2:39 pm
 
Forum: General Discussion
Topic: controling Nerve of the Brain? Which One
Replies: 7
Views: 1493

Re: Important unknown nanotech within humans

... the interaction between qaurternary ammonium salts and hydrogen donors such as Carboxylic acid. Benzoic acid is one such hydrogen doner,as to is sodium chlorite and formaldhyde.all three are present in the human consumption chain,bezoic acid being a highy common food preservative,sodium chlorite ...

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by vincio
Tue Feb 10, 2009 7:22 am
 
Forum: Molecular Biology
Topic: Important unknown nanotech within humans
Replies: 28
Views: 2766
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