Questions tagged [ph]

pH is a measure of the acidity of a solution. It is defined as the negative logarithm (base 10) of the concentration of hydronium ions in a solution.

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Why does the pH decrease, when adding pancreatin to different types of milk (cow milk, soy milk etc.)?

I'm experimentally observing how pancreatin affects the pH in different types of milk. Why does the milk's pH decrease when I add an enzyme solution to different types of milk (e.g., cow milk, soy ...
Paula Richter's user avatar
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Why do you die if you cannot breathe?

I was wondering what the actual reason for death by suffocation is. Obviously it is related to oxygen deprivation. But what is the underlying cause of death? Is it due to insufficient oxygen for ...
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Determining net charge of amino acid at given pH

I am trying to calculate the net charge on an amino acid, but I seem to be doing it wrong. The question I am trying to answer is "In a pH 7.0 buffer, what will be the charge of Methionine?" ...
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Does pH affect Michaelis constant?

I have been trying to confirm the Km of a substrate (which is 34 +/- 4 mM). This value was obtained in 50 mM MOPS, pH 6.3. I conducted my kinetics assay in a buffer of pH 7 and obtained a Km value in ...
wswr's user avatar
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Why does pH have an effect on enzymes?

I am currently studying biology and would like to know why enzymes work best in a particular narrow range of pH (the so-called pH optimum). Unlike temperature change, I do not think this has much to ...
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Do the pH and other ions affect the hydrolysis of ATP

ATP hydrolizes to ADP and phosphate in a strongly exergonic reaction and is used for energy transfer and short-term storage in cells. ATP is stable inside a cell, so a significant activation energy ...
user25269's user avatar
3 votes
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What are the highest and lowest possible pH, paCO2 and HCO3 in the blood of living human?

What are the highest and lowest possible values of pH, $paCO_2$, and $HCO_3$ in the (arterial or venous) blood of a living human being?
Orion's user avatar
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Chart of blood pH across different animal species?

How does blood pH vary across species? I can't find an article or chart listing this kind of information. So far I've found bits and pieces like: Human blood pH is nominally 7.4. 7.4 seems to be a ...
Brock Adams's user avatar