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Oxygen & Hemoglobin calculations

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Oxygen & Hemoglobin calculations

Postby jonathan80 » Fri Nov 17, 2006 3:19 pm

It is well known that 1gram of Hb can carry 1.34 ml of O2.
I tried to calculate this number my self.

The molecular weight of hemoglobin is 68e3 Dalton or 1.122e-19 grams.
so each gram of Hb contains 1/1.122e-19 = 8.9126e18 molecules of Hb.
Each molecule of Hb contains four hem groups that can bind four O2 molecules so: 1grHb=8.9126e18*4=3.5650e19 molecules of O2.
The molecular weight of O2 is 16gr/mole. Therefore 1 molecule of O2 weights 16/6.0221415e23=2.6568e-23gram.
So - 1 gram of Hb contains 3.5650e19*2.6568e-23=9.4717e-4 grams of O2.
the density of O2 is 1.429gr/Liter ==> 0.69979Liter/gram ==> 699ml/gram
Finlay: 1 gr of Hb = 9.4717e-4*699=0.662mlO2.

Any idea where's my mistake?
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Postby biouser123 » Sat Nov 18, 2006 1:02 am

The molecular weight of O2 is 32 and not 16....
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Postby MrMistery » Sat Nov 18, 2006 8:53 am

the periodic table.. ain't it a bastard?
By the way, why did you want to calculate it by yourself? don't you trust your physiology book?
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Postby sachin » Sat Nov 18, 2006 1:52 pm

MrMistery wrote:the periodic table.. ain't it a bastard?
By the way, why did you want to calculate it by yourself? don't you trust your physiology book?


Whats this :?: :shock:

Is this forum not open for everybody.

"jonathan80" is new he may have made some mistake, its our respons. to correct it, isn't it?

and if any body trying to explore anything is it bad? We ve to encourage such poples; tommorow they may be great scientist; unrecognised by us.
As Alb. Enstein Was in his school days :P 8)
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Postby MrMistery » Sat Nov 18, 2006 6:10 pm

hm.. I was joking... Geesh...
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Postby Dr.Stein » Sun Nov 19, 2006 4:28 am

Andrei, are you in your PMS syndrome? :lol:
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Postby MrMistery » Sun Nov 19, 2006 12:06 pm

i certainly hope not :lol:
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Postby Dr.Stein » Mon Nov 20, 2006 3:47 am

Actually it was me 8) :lol:
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Postby sachin » Mon Nov 20, 2006 5:14 am

What causes PMS?
The causes of PMS are not clear. It is linked to the changing hormones during the menstrual cycle. Some women may be affected more than others by changing hormone levels during the menstrual cycle. Stress and emotional problems do not seem to cause PMS, but they may make it worse.


If you people are talking about this then.



:lol: :P :D :o :shock: :?: :lol: :lol: :lol:
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