Questions tagged [organic-chemistry]

Chemistry relating to carbon-containing compounds. Should relate to biology as opposed to being purely about chemistry.

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Preparation of dihydroxyacetone phosphate from glycerine by fermentation

I read on Wikipedia that dihydroxyacetone (DHA) can be obtained from fermentation of glycerin. I would like to obtain dihydydroxyacetone phosphate (DHAP) for a science experiment but, since I'm 15, I ...
4D Neuron's user avatar
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Why are disaccharides less reducing than monosaccharides?

My teacher told me the statement, but if both monosaccharide and disaccharides have a single free active group, how is this possible?
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What is the representation for Sulfur in organic matter?

We often represent organic matter with the following equation: $$ (CH_2O)_x(NH_3)_y(H_3PO_4)_z \tag{0} $$ For example, the organic matter with the Redfield ratio has the form of $(CH_2O)_{106}(NH_3)_{...
T X's user avatar
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What is the chemical makeup of mealworm frass?

We have been raising mealworms for some time and while mealworm frass has proven very useful as a plant fertilizer, I started wondering about other potential uses of this leftover waste. Can someone ...
ylluminate's user avatar
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Carbon dioxide concentration in alkaline media

I am running a batch experiment using penicillin bottles where I have bacteria growing for 21 days in a highly alkaline media (pH 10). I am measuring the CO2 and O2 content in the headspace over time, ...
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Question on protonation/deprotonation of amino acid side chains

I understand that actual pKa of amino acid side chains is greatly influenced by the surrounding environment. I am trying to deeply understand the equilibrium between protonated and deprotonated form ...
Science123's user avatar
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Measuring the protein content using UV Vis

The experiment is to determine the protein content of the solution. I followed the procedure of the Bradford assay but the reagent needed is unavailable and so we use an alternative by using cold pure ...
unknown0000's user avatar
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Is there a chemical reaction that blocks two cysteines by reacting with a third molecule?

The idea is to block the two cysteines so they can't react in the future. We need the reaction to remove the -SH groups of the two cysteines, or modify them. Also important, the reaction should not ...
Antoine Roland's user avatar
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Is there a organ or type of cell that makes Nagalase?

Schindler disease / Kanzaki disease is being described as alpha-N-acetylgalactosaminidase deficiency. So then, which organ or cell(s) produce this alpha-N-acetylgalactosaminidase (Nagalase) ?
Neel's user avatar
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What chemicals will kill P1 Phage but not E. coli?

I'm working with E. coli and P1 Phage. I'm wondering if there is some chemical agent that will kill or disable P1 but leave E. coli untouched? It is not enough to just prevent infection. It must ...
Derek Ping's user avatar
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Why does the brain produce cannabinoids?

I've been reading lately about the brain producing cannabinoids. I was introduced to this idea by the Wim Hof Method which has been shown to increase the amount of cannabinoids (that is, compounds ...
Charlie's user avatar
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What will CD spectroscopy show when L- and D- forms of proteins are mixed?

What will happen if equimolar concentration of L- and D- forms of proteins are mixed and we take the circular dichroism reading? Will the positive and negative ellipticity cancel each other out or ...
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Xenobiotic metabolism: phase 1 reduction enzyme

Phase biotransformation reactions can be oxidations, reductions or hydrolysis of the xenobiota molecule. Phase 1 oxidations are catalyzed by the cytocrome P450 enzyme, abbreviated with the CYP acronym:...
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Does ellagic acid dissolved in DMSO react with Brain Heart Infusion media?

I dissolved 2mg of Ellagic acid in 500 microliter of DMSO. I used 100 microliters of this solution to test for antimicrobial susceptibility against E.faecalis by adding it to 100 microliters of BHI ...
Shreesha Padyana's user avatar
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What is mechanism of action of ellagic acid as an antimicrobial compound?

Ellagic acid (a polyphenol) works as an antimicrobial compound. But what is its mechanism of action? I found these 2 research papers related to this, however the mechanism of action is not clearly ...
Shreesha Padyana's user avatar
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Why can $\alpha$- and $\beta$-glucose molecules not link together?

My textbook states that for two glucose molecues to link together, they must be of the same form, i.e. they must both be either $\alpha$-glucose or $\beta$-glucose molecules. Why is that the case?
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