The tag has no wiki summary.

learn more… | top users | synonyms

2
votes
2answers
18 views

What is the difference between protein domains, motifs, and supersecondary structures?

I was just wondering if there is any difference between supersecondary structure and motifs. As well, is a protein domain an independently folded region of a protein that has a particular function ...
1
vote
1answer
9 views

in which way calcium promotes cell division

I have read in bio chemistry that calcium plays an important role in the cell division but the in depth information is'nt available in the textbook and I cannot memorize any fact without a supporting ...
3
votes
0answers
61 views

How is Melatonin Synthesised?

I should like to know roughly how the hormone melotonin is synthetically made for the pharmaceutical industry (i.e. not how it is made in living beings). I can't seem to find any reference to its ...
2
votes
1answer
32 views

Should binding constants be unitless when deriving fractional occupancy equations from reactions?

It is known that binding (aka association) constants are in fact unitless, as has been discussed here already. However, I'm not a chemist and am confused about when one should or should not use units ...
2
votes
1answer
27 views

Number of collisions of particles in a box (or a sphere)

Imagine you randomly spread in a cubic space of volume $m^3$ (or in a sphere of volume $V_s$, as you prefer), $n_A$ particles $A$ and $n_B$ particles $B$. Particles $A$ are spheres of volume $V_A$ and ...
0
votes
0answers
33 views

Oxidiation Number for Anaerobic Respiration

What is the Oxidiation Number for the anaerobic respiration of yeast: $C_6H_{12}O_6 \longrightarrow C_2H_5OH + CO_2 + ATP$
2
votes
0answers
38 views

How much hydrolysis will likely occur of the following bonds at pH 1-4 in the time period of 1-3 hours?

The bonds are: (I have given pictures of what I mean in case there's any ambiguity that I leave open in these questions. Also so that if you want to number the R groups you've got a head-start) ...
10
votes
2answers
1k views

Xenon and the human body

Reading this article on Wikipedia: Xenon Medical applications I see that Xenon can be used as an anesthetic, neuroprotectant and doping agent. If it is a noble gas, and thus, chemically stable, how ...
3
votes
1answer
32 views

Carcinogens, how do they work?

The easiest carcinogenic thing for me to grasp is radiation, as it directly messes with DNA. Then it seems there are other compounds that simply mimic hormones, but these shouldn't necessarily cause ...
0
votes
1answer
82 views

How to convert glucose to fructose

How to convert glucose to fructose? Moreover, can there be direct conversion(not necessarily in a single step), or we have to use indirect means, such as from sucrose, or other higher carbohydrates, ...
1
vote
1answer
111 views

Thermodynamic vs. Kinetic products

With regards to complexes, I read that thermodynamic products are favored over kinetic products, which are labile. Why wouldn't the first product formed be the most prominent?
3
votes
2answers
135 views

Photosynthesis, science fair

So I was thinking about something to do for a science fair and photosynthesis sounded like a good idea. I was wondering what the exact process of photosynthesis was on a chemical level. I know the ...
0
votes
1answer
99 views

Do proteins bind to carbon? If so how?

Can someone explain me whether a protein (like an antibody) would bind to carbon? The carbon arises due to electron beam induced deposition of Polyethylglycol (PEG). The carbon molecules that arise ...
2
votes
1answer
159 views

What is the effect of substituting oxygen with sulfur in drug molecules?

What sort of changes in the properties of organic or drug molecules can be anticipated if you substitute some or all of the oxygen atoms with sulphur atoms, and vice versa. My interest in this ...
1
vote
1answer
73 views

Why do we need to incubate this system for 18 hours at 60 degrees Celsius?

I am conducting a bio-chemistry related experiment and I have been unable to understand a step which is commonly performed. The procedure that is confusing me is outlined in the supporting ...
2
votes
1answer
199 views

Recreational drugs by half life

I am interested in the Biological Half Life of substances. In the previous wikipedia link, I've already found the half lives of common pharmaceutical products. I can't seem to find similar data for ...
2
votes
2answers
419 views

How can I control the oxygen in an erlenmeyer flask in a bioprocess?

I need to control oxygen in a erlenmeyer flask in a bioprocess. I need to remove overall oxygen in a erlenmeyer flask, and after I need to add oxygen in controlled amounts to a culture in a shaken ...
4
votes
3answers
2k views

Dissolving Organic Tissues

Watching some movie/TV this question came to mind, purely theoretical of course, if one wanted to dissolve a human corpse, like getting rid of a body after killing someone, is it better to use an acid ...
2
votes
0answers
47 views

Determine max of 2 parameter functions

I have 12 experimental tables with OD(substrate concentration, time), where OD is optical density and one table with $\mu$ (substrate), where $\mu$ is growth speed. OD and $\mu$ are functions. The ...
1
vote
1answer
412 views

What does ingredients being “biologically active” mean?

From Wikipedia Cosmeceuticals refers to the combination of cosmetics and pharmaceuticals. Cosmeceuticals are cosmetic products with biologically active ingredients purporting to have medical ...
2
votes
1answer
161 views

Breakdown of valine

What are the chemical reactions responsible for the breakdown of valine in the body? I know oxidative deamination is part of the process but how is valine further broken down from an keto acid to ...
2
votes
1answer
644 views

Chemicals and killing bacteria question

Are there ways to compute what chemicals kill a give bacteria but not another given bacteria ? Does that help much to make medication ?
4
votes
1answer
87 views

Solution based measurement of Solvent-Accessible Surface Area of macromolecules

The Solvent-Accessible Surface Area (SASA) is a valuable metric for looking at protein folding and protein-protein interactions. However, this measurement is typically done by calculating the SASA ...