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L-gulonic acid

L-gulonic acid

reduction product of glucuronic acid (-CHO → -CH2OH); oxidation product of l-gulose (-CHO → -COOH); a precursor (except in primates, guinea pigs, certain fishes, and the indian fruit bat) of ascorbic acid via l-gulonolactone.


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Re: The effect of low temperature on Ascorbic Acid

Might enzymes be present in the orange even if none are added experimentally? If enzymes are present, might they affect the chemistry?

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by jonmoulton
Thu Aug 21, 2014 3:06 pm
 
Forum: Molecular Biology
Topic: The effect of low temperature on Ascorbic Acid
Replies: 4
Views: 557

The effect of low temperature on Ascorbic Acid

Hello I was wondering why the ascorbic Acid content of oranges might decrease if the temperature decreases to just above freezing. Without enzyme interaction. (focus on the chemistry) Any thoughts on the topic?

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by fuego
Tue Aug 19, 2014 7:37 pm
 
Forum: Molecular Biology
Topic: The effect of low temperature on Ascorbic Acid
Replies: 4
Views: 557

Re: Food to ATP energy?

... entirely for ATP production). - It should be noted that not all molecules of glucose are used in ATP production. Some are used to produce lactic acid, glycogen, glycerol, fat, and I'm sure there are other metabolites that I'm not thinking of. When glucose is consumed in excess (eating more calories ...

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by tmbirkhead
Thu Aug 14, 2014 1:11 am
 
Forum: Cell Biology
Topic: Food to ATP energy?
Replies: 2
Views: 1100

drink water, orange juice or Cola before eating?

Drinking too much cola is not good for health. Because it contains phosphoric acid which reduces the bone density and also the reason for chronic kidney diseases. Drinking citrus juices is good for health, because it contains lot of vit C. I think if pH increased ...

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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: 36282

Newbie question about the first life

... caused by lightning and meteors, but to a much lesser extent). Monomers started to come together and assemble polymers. These were 1) nucleic acids, which now both carry and pass on hereditary information, and 2) proteins, which can be either a) structural elements (building blocks for organic ...

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by piscilactovegetarian
Tue Feb 25, 2014 10:21 am
 
Forum: Molecular Biology
Topic: Newbie question about the first life
Replies: 14
Views: 9465
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