The scientific study of chemical processes in living organisms, including, but not limited to, living matter.

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For protease, lipase, and amylase, include an image of the chemical, and the chemical that it operates [on hold]

I have no idea how to find a picture for these enzyems. My teacher did not explain the chemical reaction and I am really lost. Please help!
3
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38 views

Solve this chemical or biological mystery

I hope this is the best place to pose this unique question. Please forgive me if it's not. I went into a closet to get a prescription medication that was filled about a year ago. The label on the ...
2
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1answer
31 views

Water in the ultrasonication bath

Why something jelly forms in the water if it is kept in in a ultrasonication bath for long periods? When water is exposed to ultrasonication for say a month, some jelly substances form in the ...
3
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1answer
34 views

A question about osmolarity and osmotic pressure

You have discovered a new strain of bacteria called Tankeromyces subtilis that has a special outer membrane that is capable of withstanding high levels of osmotic pressure. These bacteria can ...
5
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1answer
45 views

Viewing a protein or bio structure in Chembio3D in its natural conformation

I notice when using SMILES or a IUPAC name for many molecules and generating them in Chembio3D, and then running MM2 > Minimize Energy, the structures produced are most of the time not reflections of ...
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1answer
44 views

What is the probability of us being “orderly”?

At first this question might get the following response, "What are you talking about?". But really all I am kind of asking is: What is the probability of us humans being disorderly? Or in other ...
2
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1answer
39 views

What does “NADH (sodium salt)” mean?

From what I understand, NADH does not contain any sodium, so why is it being referred to as a sodium salt? Were sodium ions added to NADH? If so, why were they added? On a related note, why is its ...
2
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1answer
75 views

Why might two different chemical structures smell the same?

From what I understand, it is the functional group attached to a structure that determines the odor it will give off, for the most part. Which explains why two similar molecules, except for their ...
2
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1answer
39 views

What does Kdep stand for?

I'm looking at some data with substrate concentration on the $x$-axis and $k_{dep}$ on the $y$. What does $k_{dep}$ mean? I understand that it must be a rate of some kind but what is the significance ...
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2answers
288 views

When an enzyme is diluted with water, what is slowing down the rate of reaction?

I'm specifically talking about the decomposition of hydrogen peroxide by bovine catalase. The number of catalase molecule obviously doesn't change, so there's the same number of catalase molecule ...
2
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1answer
36 views

Do sugar alcohols have the potential to get a person drunk?

From what I understand is ingesting high amounts of sugar alcohols can lead to various effects such as abdominal pain and diarrhea, my question is, is there a certain amount of sugar alcohol if ...
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0answers
20 views

Why does egg yolk turn white when washed with water?

I recently noticed that whenever I washed the egg yolk stuck on some utensils the water becomes milky white. It has to be the egg yolk that turns white and give off the white color to water right?
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657 views

Can we prolong life? [closed]

This is rather a bunch of questions that I decided to post on Chemistry StackExchange since I thought the chemists would have the most knowledge about the chemical processes of life. So recently I ...
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2answers
32 views

Can I use my extech pH 60 meter to measure soil pH if so how?

Can I use my extech pH60 meter to measure soil pH if so how? I included a link to the meter. Extech pH 60
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1answer
16 views

How exactly is energy created by oxidative phosphorylation

I understand how the protons and electrons move around through various carriers, shuttles and proteins...But there's this talk of electrons being in "lower in energy" at the end. What does that mean? ...
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1answer
31 views

Converting 26.62 NOx µg/L into mM (millimolars)?

I have to convert a whole lot of nutrient data : $\ce{NH_4}$, $\ce{PO_4}$ and $\ce{NO_x}$ data that is in µg/L into mM (millimolars). Could someone give me an example for 26.62 $\ce{NO_x}$ µg/L? or ...
2
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1answer
20 views

Paper making alternative

Is there any paper making alternative? What is there in trees that makes it the only thing from which paper can be made? Do we even need paper anymore with all electronic devices and stylus', etc
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1answer
20 views

How is it that fructose has a different metabolic pathway than glucose but yet glucose is converted to fructose?

Fructose is described to have a different metabolic pathway (a more fat-inducing one) than glucose (see: http://healthyeating.sfgate.com/difference-between-sucrose-glucose-fructose-8704.html) as it ...
3
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1answer
80 views

How do you identify reducing / non-reducing sugar by looking at structure?

Identifying reducing / non-reducing sugar been confusing me for a while now , I know that reducing sugar contain aldehyde or ketone group . It's easy to identify them in monosaccharides but this ...
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49 views

Similar proteins in milk, oats and eggs [closed]

I have read that the proteins present in oats are similar to those in soy, milk and eggs. I know nothing about biochemistry, and am struggling to decipher the info I've found... The closest I've come ...
2
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0answers
38 views

Hemoglobin equilibrium - effect of increased carbon dioxide and lactic acid

The binding of oxygen by haemoglobin giving oxy-haemoglobin is partially regulated by the concentration of $\ce{H3O+}$ and dissolved in $\ce{CO2}$ in blood $$\ce{HbO2 + H3O+ +CO2<=>H+.Hb.CO2 + ...
11
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3answers
136 views

Is it possible to make a drug that liquefies heart plaque to treat heart disease?

Is it possible to make a drug that liquefies heart plaque to treat heart disease without damaging other parts of the body? If so, would the liquefied plaque be eliminated as regular fluid is through ...
3
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1answer
40 views

¹H-MRS Detection of Dopamine

Why is it difficult to detect dopamine using $\ce{^1H}$ Magnetic Resonance Spectroscopy (MRS) in the brain (in vivo)?
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19 views

Estimating the protein concentration of an unpure protein solution

I'm confused on this problem for estimating protein concentration. Upon first glance, it looks like a simple Beer's law problem. but then there's the issue that the protein is not pure. How do I ...
6
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2answers
126 views

Is most of the weight you lose actually released as carbon dioxide when you exhale?

I've heard that most of the weight you "lose" is actually carbon dioxide released when you exhale. In percent its much more than what is released in pure heat energy and feces. Does anyone have ...
3
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1answer
57 views

Carbonic acid-hydrogencarbonate buffer system pH calculation?

I am learning about the pH of buffer solutions, and am slightly confused by my text book's calculation. For the blood's buffer system of carbonic acid and hydrogencarbonate ions as the conjugate case, ...
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0answers
15 views

Microorganism preventative solution safe for using on a roof and will last in the sun

Information is scarce in the roof cleaning industry and the big guys are making a killing selling chemicals that are harmful to the person using it and everything around the home. I would like to find ...
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2answers
66 views

Pathway from Sucrose to Cholesterol

I was reading Linus Pauling's book How to Live Longer and Feel Better, and in various places in the book he discusses a correlation between increased sucrose intake and increased blood plasma ...
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0answers
35 views

Identify “decoupling sites” in Glucose Oxydase reaction

Given the following coupled reactions: $$\ce{Glucose + O2 + H2O + Glucose~Oxydase -> Gluconic~Acid + H2O2}$$ $$\ce{H2O2 + TMB(star) -> TMB}$$ Identify: A potential reagent or product that ...
2
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1answer
22 views

How do transmembrane protein alpha helixes bind to the membrane?

I would post this in biology but as the question is biochemical in nature I decided this would be a more appropriate platform. What I'm asking is how exactly does a transmembrane protein bind to the ...
3
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1answer
96 views

How do I know that an acid and conjugate base are present in equimolar amounts?

Acetylsalicylic acid is a molecule in several popular drugs such as Magnyl and aspirin. Its pKa is 3.5, and I'm about to calculate the pH of a 0.010 M solution of acetylsalicylic acid. I've read up ...
3
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1answer
44 views

Calculating charge of amino acids (am I doing it right?)

Please consider this picture of a peptide chain: I've done some examining on the different amino acids and concluded that the chain is as follows: Lys-Leu-Gly-Ser-Citrullin (variant of arginine). ...
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1answer
16 views

Determination of a chemical compound in a non-homogeneous sample

I want to know if it is possible to determine a chemical compound in a non-homogeneous sample. I am asking this because we are aiming to create a device that will detect histamine level in fish ...
2
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1answer
28 views

kinetic and thermodynamic parameters of biodiesel production from lard

I want to know if someone has experimental results and calculations of the kinetic and thermodynamic parameters of Base Catalyzed Transesterification of pig fat, if not which is the method used to ...
2
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1answer
73 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 ...
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3answers
41 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 ...
4
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2answers
201 views

How to buy 1g of enzyme that is sold in units/mg?

I am trying to buy 1g of horseradish peroxidase. On sigma-aldrich, it is sold as units/mg. I am confused as to what this unit is. It comes in 50-150, 150-250, and 250-330 u/mg. The way I currently ...
2
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2answers
38 views

Rate constant and Michaelis Menten

Please consider the following figure of a concentration over time (msec) diagram with variables for an enzyme, a substrate bound enzyme and a product. Recall that $\ce{E + S \leftrightharpoons ES ...
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1answer
44 views

Why does Ammonium sulfate cause proteins to precipitate?

I'm trying to understand an observed reaction from a chem practical: You have a solution of ammonium sulfate, which you add to a bovine serum albumin solution. The proteins precipitate, and the ...
2
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1answer
39 views

Why don't ions have one equilibrium potential? (Nernst equation)

I know that equilibrium potentials are dependent on the ratio of ion concentrations inside and outside of the cell and temperature. I also know that the equilibrium potential is reached when there is ...
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1answer
43 views

Hydrolysing large molecules to reveal amino acids

Consider Oxytocin: I am asked to hydrolyse Oxytocin and reveal 5 amino acids which are the result of this hydrolysis. I must admit I have no idea where to begin. I know that generally amino acids ...
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1answer
33 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 ...
3
votes
1answer
99 views

Is it possible to chemically treat grass to make it digestible?

Is it possible to chemically treat grass after "harvesting" it to make it digestible by humans? I know we can "eat" grass, but we can't break it down in our stomachs. If there is some chemical ...
2
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3answers
156 views

Why and when is lysine charged

I'm reading about Lysine and doing some calculations on it's charge under various $\ce{pH}$. Depending on the source, Lysine is usually stated as a charged amino acid with a $\ce{NH3+}$ group. ...
2
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1answer
45 views

How to rationalise the protonation state of amino acids

I am learning about amino acids in various $\ce{pH}$ environments and how their groups are protonated or deprotonated in these environments. I don't need to mention a specific acid for my question, I ...
2
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2answers
204 views

Chirality on Propranolol

I'm a bit confused when asked to specify the chiral carbons on this sketch of Propranolol as I'm not sure how the $\ce{H3C}$ and $\ce{CH3}$ play in if they are reversed in the name like that...Does ...
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16 views

Which solvent is good for using SU-8 particle in Optical tweezers?

I'm studying Optical tweezers. I've used Polystyrene for samples. Nowadays, I've got SU-8 pillar. I wanna use that for sample, but its density is heavier than water. I can't use that. So I wanna know ...
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1answer
41 views

Which chemicals upregulate Atoh1? [closed]

Atoh1 has been shown to have cancer fighting properties. I'd like to increase the notch pathway to make it more active. How can I increase the expression of Atoh1 with a vitamin or biochemical ...
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0answers
41 views

Aluminium in Active Carbon Water Filters

So I saw on article stating concerns about eating active carbon due to high levels of aluminium found, would this have implications with active carbon water filters? Or would the aluminium not get ...
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39 views

How could click reaction take place at low concentration?

I have DBCO-functionalized resin, and the DBCO group is validated with FAM-azide. But I cannot use this resin to react with FAM-Azide-labled primer, which has very low concentration (20 μM, it is ...