From the lesson Online CAT 2009 WOW: A new feature to learn Vocabulary
Tue, 07 Apr 2009 04:52:28 -0000
WOW….............
Person
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From the discussion What's your favourite element?
Thu, 19 Feb 2009 08:33:06 -0000
My favorite element … ! Its Ca: Calcium.
Calcium is the most abundent metal ion in the human body (1.5%). It is important for the production of skelital structures such as bones & teeth. A small quantity of Calcium iis present in the blood and soft tissues. It is needed for nerve and muscle functions. Ca helps in the regulation of heart beats and it is essential for blood coagulation.
Plenty of Ca is required during pregnency and lactation.
Other beneficial elements and approximate %s.
Elements %
Oxygen 65% Sodium 0.15% Carbon 18 % Chlorine 0.15% Hydrogen 10 % Magnesium 0.05% Nitrogen 3 % Iron 0.004% Phosphorus 1.0% Zinc 0.0033% Potassium 0.35 % Manganese 0.003% Sulphur 0.25% Copper 0.00015% Iodine 0.00004%
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From the lesson History of the Atomic Theory- Part 6
Tue, 27 Jan 2009 19:20:20 -0000
It was Nice to know, thank you sir…
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From the lesson Why smoking is harmful........the chemistry of nicotine...
Sun, 04 Jan 2009 11:17:28 -0000
I was an heavy smoker, from the last 6 months i hv not burnt even a single cigaratte.. thanx to suggesting smokers…
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From the lesson Basics of Algebra: Part I
Sat, 03 Jan 2009 18:16:38 -0000
Nice to know the basics Thank you…..
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From the lesson International Student: Plan for Admission to US University
Mon, 29 Dec 2008 08:14:14 -0000
Hi can u please tell me how to take GRE tests…..
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deepa mittal said – Wed, 31 Dec 2008 04:55:21 -0000
GRE Test is conducted online at designated centers. For details on registering for the test click here