All Questions
Tagged with lipids organic-chemistry
10 questions
5
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why is alpha-linolenic acid "alpha"?
I'm learning about how fatty acid names are formed. In the process, I noticed a molecule called alpha-linolenic acid. There's a similar molecule called linoleic acid. Both have 18 carbons, but alpha-...
- 129
5
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1
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What is the mechanism of Salkowski reaction of сholesterols?
I recently came across the Salkowski reaction of cholesterols. Cholesterol in chloroform is treated with concentrated sulfuric acid. A positive test exhibits two distinct layers, the upper chloroform ...
- 370
0
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0
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133
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Why do the two layers of a phospholipid bilayer stick together?
Every answer I can find about why phospholipids form a bilayer says the same thing: hydrophilic heads associate with water, hydrophobic tails do not, so they arrange themselves with heads facing ...
- 87
1
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0
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DIY lipid nanoparticles
I, and a number of friends, take a bunch of supplements that are polyphenols and often flavin-oids, -ols or -es; also numerous carotenoids. Examples include quercetin, luteolin, fisetin, curcumin, ...
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-5
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Why polysaccharides are not considered as lipids? [closed]
It is mentioned in my textbook that all lipids have one common trait which defines them :they are insoluble in water;they are hydropohic.
I want to ask ,since polysaccharides are also insoluble in ...
- 11
1
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1
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What kind of plastic is (really) safe to store vegetable oil?
Storing colza or olive oil in a plastic bottle might be risky since the oil can leach out phthalates and BPA (and others molecules?).
Some manufacturers sell "phthalates and BPA free bottles", but ...
- 439
1
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1
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4k
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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 ...
- 19
2
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1
answer
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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 ...
- 18.8k
1
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1
answer
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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 ...
- 177
12
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1
answer
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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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