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0answers
26 views

Is carbohydrate alcohol inebriant?

First of all, though I think that my question is related to this society, if you think reverse, tell me to delete the question: I would like to know if carbohydrate alcohol is inebriant; Can anyone ...
2
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1answer
50 views

The meaning of different parts in the naming of glucose

There are two main types of glucose, $\alpha$-D-(+)-glucose and $\beta$-D-(+)-glucose. Can anyone please explain what is $\alpha$,D or (+)? So (maybe by permutation and combination), how many types ...
14
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1answer
2k views

Why does brown sugar have a strong smell but white sugar doesn't?

I noticed something while cooking and was wondering what the chemical explanation is for this. White sugar has a smell, but it's different, and much fainter than that of brown sugar. Brown sugar is ...
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3answers
33 views

Biochem Book age and suggestions

I'm taking chem classes, and am interested in learning a some biochem on the side, on my own. I've bee looking for a decent book, though I'm on a bit of a tight budget so not brand shiny new ones ...
2
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1answer
32 views

Maltose Nomenclature

Maltose has a 1,4 glycosidic linkage between 2 molecules of α-D-Glucopyranose . My textbook suggests the final name of maltose as 4-O-(α-D-Glucopyranosyl)-D-glucopyranose I wanted to know what ...
0
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1answer
31 views

What is a triglyceride?

I'm confused on what a triglyceride is, from what my text book it says its a type of gylercide, then from a website it said Glycerides can be subdivided into two categories. The first group, the ...
0
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1answer
28 views

Is it possible to identify the source of a protein hydrolysate [closed]

I have a powder which only declares to be "Protein Hydrolysate" Meaning that the all the protein has been broken down. We've tried to identify the source of the powder with DNA research. But no ...
4
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1answer
374 views

What are the biochemical ramifications of ingesting of distilled water?

Are there any distinct biochemical reactions that are affected by the ingestion of distilled water? The water is "distilled" in its literal sense.
2
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1answer
58 views

Why and how does lycopene absorbance increase with heating?

Lycopene, which is a carotenoid and a phytochemical is the main reason for why tomatoes are radio-protective. Source 1 . Source 2 Let's cut to the chase: I was wondering if this claim of The ...
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1answer
53 views

Is Acrylamide carcinogenic? Why?

Recently concerned with health effects by common chemicals existent in food I've been rather busy reading article after article; and just an interesting one came around: Acrylamide (or acrylic ...
4
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1answer
526 views

CO poisoning - What I've been taught is a hoax?

In elementary school, I happened to ask my teacher: What is $\ce{CO}$ they talk about these days? I was then taught that Carbon monoxide "competes" with the oxygen in our blood (we were taught ...
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2answers
127 views

Are all amino acids except glycine chiral compounds?

Specifically, I was thinking of the case where the R group is a carboxylic acid functional group or an amine group. Then there would not be a chiral carbon atom. Is there a restriction on what can be ...
3
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1answer
65 views

what would happen if you got a full package of wet silica gel on your hand after it tore open? [closed]

I accidently opened a bag of silica gel and got it on my hand what will happen to my hand because now it kinda feels weird.
4
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3answers
77 views

Can a single monomer be a macromolecule? If so, when?

In our science class, we're learning about the four fundamental macromolecules in every living organism: carbohydrates, proteins, lipids, and nucleic acids. Our class definition of a macromolecule ...
2
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1answer
92 views

What compounds exist in the bitter peel of specific fruits?

Actually, my original question was: What makes a pith of pomegranate so bitter? Then I decided to be more generic. You'll hardly find someone that consumes pomegranate and doesn't nag about the bitter ...
2
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2answers
52 views

Same monomers, different water content?

We're currently studying "the chemistry of contact lenses", which is mostly polymers and gels. I just looked at the package of two pure hydrogel lenses made out of the same monomers, but they have ...
0
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1answer
38 views

Aspartame poisoning: Can it modify aminoacids?

I just accidentally closed a webpage (and did not find it later) which described that somehow, Aspartame poisoning victims had faults in the vital proteins of their body due to the reaction of ...
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3answers
1k views

Why is methanol toxic?

There are two points of view for the answer of this question: The biological view, the only one that I faced during my research, states that since it can trigger perilous conditions like metabolic ...
0
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1answer
20 views

Mass of sucrose solutions

What is the mass of 150 ml of 40% sucrose, and what is the mass of 150 ml of 20% sucrose? I don't know exactly how to figure it out without using a device to tell me the mass. All I know is the mass ...
0
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1answer
64 views

Mixing of powders to make stock solutions

For a solution such as: Luria-Bertani (LB) Broth: 10g tryptone 5g yeast extract 10g of NaCl (mw 58.44) q.s. to 1L, pH to 7.2, autoclave. I would like to make a bulk amount of premixed powder, ie ...
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0answers
19 views

Enzyme Assay - pectinase

I am working on Enzyme Assay.I assayed the enzyme in different buffers from $pH\ 1-12.5$ However,the enzyme has good activities starting from $pH\ 1-10.5$ Is that possible to have enzyme activity in ...
1
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1answer
50 views

If dark surfaces absorb/store more light/energy than light surfaces, then does dark skin, on average, store energy from light most efficiently?

If darker surfaces absorb/store more light/energy per square inch than light surfaces, then does dark skin, on average, store energy more efficiently than light skin? (edited).
1
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1answer
81 views

Pectinase enzyme assay

I am working on pectinase enzyme assay. I incubated 900 ul of substrate for 10 minutes in the water bath, followed by adding 2ml of DNSA reagent, then 100ul of enzyme extract added finally i read the ...
2
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2answers
254 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
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1answer
11 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
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0answers
97 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
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1answer
71 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
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1answer
38 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 ...
3
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0answers
56 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) ...
14
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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
47 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
153 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, ...
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1answer
153 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
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2answers
178 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 ...
1
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1answer
112 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 ...
3
votes
1answer
313 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
114 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
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1answer
265 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 ...
3
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2answers
713 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 ...
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4answers
3k 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
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0answers
52 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
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1answer
820 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 ...
3
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1answer
189 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
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1answer
809 views

Are there ways to predict which chemicals will kill certain bacteria?

Are there ways to compute what chemicals kill a give bacteria but not another given bacteria ? Does that help much to make medication ?
4
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1answer
98 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 ...