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Questions tagged [lipids]

For questions related to lipids including but not limited to fats and their derivatives in regards to chemistry.

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23 views

What would be the weight loss equation be for Ketosis? [closed]

This is the formula for how the body uses fat: $$\ce{C55H104O6 + 78O2 -> 55CO2 + 52H2O + energy}$$ From this video: What would be the equivalent formula for Ketosis?From my research ketones can ...
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1answer
160 views

Is flour or baking soda really suitable for extinguishing grease fires?

I think most have heard the advise that you should put flour (or baking soda) on a grease fire to absorb the oil before. While this is certainly better than using water, I'm skeptical. For starters ...
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1answer
49 views

Why would diclofenac have a higher skin permeability when formulated as diclofenac epolamine rather than diclofenac sodium?

There is a suggestion on the literature that the formation of ion pairs creates a permeation enhancement. Usually only non-ionised compounds penetrate the skin. Is it possible that the conjugate ...
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1answer
364 views

What happens to a quaternary ammonium cation at a pH above its pKa?

I am working with a lipid and I have firm reasons to believe that its pKa is around 8. This lipid is a cationic lipid where the nitrogen is a quaternary amine with two lipid chains and two methyl ...
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0answers
28 views

What Makes Oils Feel Dry or Oily? [closed]

Simple question with a complex answer, certainly: Why do some oils feel "dry," while others feel "oily"? Is the feel directly related to C-chain length, or hydrogenation, active groups, or something ...
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1answer
463 views

Could detergents dissolve cell membranes?

Animal cells have a lipid membrane and detergents are great at emulsifying lipids. Yes, there are proteins, cholesterol and other numerous substances in the lipid bilayer, but the lipids make up the ...
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1answer
200 views

Are triglycerides macromolecules?

I've previously been taught that triglycerides are macromolecules. However, a current professor of mine gave the definition of macromolecules as "polymers of covalently linked monomers". Since, ...
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0answers
87 views

How do water based solutions (cream, gels) etc permeable through hydrophobic skin? [closed]

Most skin care products or the sort are oily, lipid based. Our skin is hydrophobic. I reckon the reason is to be easily permeable through the skin. So how do these skin care or any products which are ...
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1answer
213 views

Why are plastics lipophilic?

My wife prepares lunch for me every morning. After eating it on my desk, I typically wash the lunchbox and utensils in the company's kitchen. I have noticed that it is very difficult to remove the ...
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1answer
726 views

How are phosphoglycerides different from phospholipids?

(Currently studying high-school Biochemistry) I'm unable to distinguish between phospholipids and phosphoglycerides from their "definitions" (Courtesy: Wikipedia) On phospholipids: Which suggests ...
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1answer
427 views

What happens during oxidative and hydrolytic rancidity of fats?

I understand that when lipid molecules - triacylglycerol - are hydrolysed, the fatty acids 'break' off from the glycerol backbone. And when fatty acids oxidise, these in turn can break into smaller ...
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1answer
100 views

How well can triglycerides be resolved using TLC?

The only part of triglycerides that significantly interacts with a TLC plate are the ester moieties which are present in all triglycerides. Other than that, they do not differ much, except in mass (...
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1answer
115 views

What is the significance of Sphingolipids in human?

I want to know the significance of sphingolipids in human. I have learnt that sphingomyelin is the most significant type of sphingolipid in human. Also that the sphingomyelin serves as a structural ...
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3answers
580 views

Is it known for sure that bases feel slippery because of the production of soap/surfactant?

Discussion around the question Why does bleach feel slippery? has started me thinking about the saponification explanation for the slippery feeling of basic solutions. According to Wikipedia: ...
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1answer
26 views

How can I know if there is a phospholipid (phosphatidylcholine) in a solution?

I have a solution which probably contains a phospholipid (phosphatydylcholine), I would like to know if there is an easy method to show the presence of the phospholipid. I came across TLC, but I ...
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1answer
595 views

Do unsaturated fatty acids with an odd number of carbons exist?

Our teacher asked us about fatty acid C21:3. Does this fatty acid even exist?
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0answers
677 views

Mechanism Permitting Proton Sponge Effect

The proton sponge effect is utilized as a drug delivery method to release contents packaged in micelles (usually coated in PEG or another protective polymer) into the cytoplasm of a cell after being ...
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2answers
4k views

Are triglycerides soluble in polar solvents?

In my textbook it is said that they are soluble in non-polar solvents (which makes sense), but also soluble in polar solvents (halogenoalkanes and some ethers like ethoxyethane) It is said that the ...
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1answer
164 views

What is the common denominator of all the lipids?

I've read the lipids article on Wikipedia, but I couldn't understand the answer for my question and I'll explain why. In biochemistry we have monomers and polymers while the monomer is the basic ...