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

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After a night of drinking, why am I hungry for information? [on hold]

This is a tough question to phrase appropriately, but I will try my best. Last night, I had a small party at my house, and we ended up drinking a lot of alcohol, both beer and liquor. I was no where ...
2
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1answer
31 views

Is household ammonia okay for plants?

My father-in-law claims that since plants need nitrogen to produce proteins, and since ammonia is NH3, that Ammonia should be fine for the plants, since it's just nitrogen and water and hydrogen, ...
-1
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0answers
16 views

Reversible biological module in KEGG

Considering the kegg module M00570 The pathway looks like this: ...
2
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1answer
51 views

How to calculate the Jaccard index [closed]

I want to calculate the Jaccard index between two compounds. What is the algorithm? I have searched for it, it just gives the formula but how to apply it on compounds is not known to me. Can you help? ...
0
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1answer
47 views

What are these pathways called in Biology?

Considering the pentose phosphate pathway and the sulfate reduction pathway in bacteria; What are these types of reactions called in biology? Bio degradation reactions or bio transformation reactions ...
0
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0answers
10 views

What is isomeric threshold and isomeric count?

Found the terms isomeric point and isomeric threshold in the following paper: http://lib.gen.in/ocean/9064caa3202a71977f338ecb430280a7/10.1007%40s12539-012-0119-8.pdf It siad that the isomeric point ...
0
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1answer
27 views

Factors on which one compound transforming to another compound depend [closed]

Considering the Metabolic Pathway: http://www.genome.jp/kegg-bin/show_module?M00166 Consider the reaction R01523(the very first reaction). How is it possible to know that the compound ...
2
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1answer
23 views

Question related to L-arginine biosynthesis

With respect to the L-arginine Biosynthesis pathway, the very first reaction converts L-glutamate to N-acetyl L-glutamate. In the linked reaction scheme, why are only L-glutamate and N-acetyl ...
2
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1answer
38 views

Question regarding an Escherichia coli reaction

With respect to this link http://www.biocyc.org/ECOLI/NEW-IMAGE?type=REACTION&object=RXN-14479 Here the enzyme is mentioned and the two reacting compounds. Now , my question is 1. When these ...
4
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2answers
150 views

Do acetyl-CoA, acetyl-CoA carboxylase and acetyl-glutamate carry any charge?

Do the following compounds have any charge? If not, then why? If yes, is there any database that would give me this information if the compound is negatively or positively charged? The compounds are ...
4
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1answer
223 views

Water soluble molecules

I believe I may have misunderstood water solubility this entire time. I assumed that water soluble meant that it would literally dissolve in water. It would break down into atoms. A sugar molecule ...
1
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0answers
72 views

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 ...
1
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1answer
69 views

How is the rate of transcription influenced by temperature?

How is the rate of transcription influenced by temperature? More precisely, I am looking for an article who quantitatively measured the rate of transcription of an "average gene" and show how this ...
2
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1answer
47 views

What are the minimal chemical requirements for a food which we all can eat? [closed]

I've been puzzled by the following though experiment for the past few days: I want to make my own food from scratch, but I do not know where to start from. I want to be 100% sure that what I eat will ...
0
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2answers
115 views

How can you explain the origin of life out of nonliving matter (abiogenesis)? [closed]

According to biochemist Robert Shapiro, the "primordial soup" theory is as follows: Early Earth had a chemically reducing atmosphere. This atmosphere, exposed to energy in various forms, produced ...
2
votes
1answer
156 views

Solubility of Forskolin in ethanol

I am interested in using forskolin in cell culture medium. Does anyone know how to make solution of 10 microM forskolin in 5% ethanol or less. I would like to avoid using DMSO as a solvent. Thank you. ...
2
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1answer
361 views

What does the (-) in the molecule name mean?

I'm reading some text (purchase request) that has the following line in it. (-)-Norepinephrine What does the minus sign mean in front that is in parenthesis? Is this some kind of standard way of ...
2
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1answer
169 views

What is the chemical composition of an egg shell?

It ought to be some combination of C, O, and H, I presume. But really why should I care if eggshell gets in my eggs while I'm cooking?
2
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1answer
465 views

What is the effect of flash pasteurisation on Maillard reactions or production of AGEs in milk?

Does flash UHTP homogenision and pasteurisation change significantly the extent of maillard reaction in milk compared with traditional batch pasteurisation? If this is significant does this effect the ...
0
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2answers
159 views

Is Hydrogen gas present in biogas, and does it spontaneously ignite?

Is Hydrogen gas present in biogas? As it is highly inflammable, may it ignite the other gases like methane?
1
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1answer
32 views

cell uptake prediction

I'm generating random molecules I would like to know if they are able to pass through the cell membrane. Are there any ways (preferably computational) to predict cellular uptake of an organic molecule ...
2
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1answer
7k views

Melting point of a fatty acid?

What factors determine the melting point of a fatty acid? Chain length The number of methylene group The ionized state of the fatty acid Its degree of saponification Its ability to alter the ...
1
vote
1answer
392 views

Where are doxycycline's anti-inflammatory properties derived from?

I have been looking at this antibiotic called doxycycline which is used mainly as an antibiotic. It has however some interesting anti-inflammatory properties. Does anyone know where these ...
3
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1answer
52 views

Glutamine analysis

I use to run a method to analyse all the amino-acids in a food sample. For that I have to hydrololyse the sample and in the last stage of the method I read the amino acids with a ion exchange ...
8
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1answer
234 views

What is the maximum potential sucrose concentration of plant sap? What keeps plants below this potential?

I am interested in identifying the maximum potential dissolved sucrose (%w/w) that plant sap could have, and which (biological, physical, chemical) factors constrain the observed sucrose ...
10
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1answer
336 views

What are the olfactory chemicals in whiteboard/permanent markers and what do they bind to in the nose, lungs, and brain?

What are the olfactory chemicals in whiteboard/permanent markers and what do they bind to in the nose, lungs, and brain?