metalresearcher
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Why do onions irritate eyes and smell ?
Whe slicing onions a nearly pungent odor appears which also generates tears. Leek has (in a lesser extent) the same effect.
Which chemicals are responsible for this ?
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hissingnoise
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Organo-sulphur compounds basically . . .
Their vapours are eye irritants - obviously!
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entropy51
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The odor of onions is due to allyl propyl disulfide, and the lachrymatory properties are due to thiopropionaldehyde.
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condennnsa
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http://en.wikipedia.org/wiki/Syn-propanethial-S-oxide
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psychokinetic
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Because ogres are like onions, and it would hurt if you shoved an ogre in your eyes.
>.>
“If Edison had a needle to find in a haystack, he would proceed at once with the diligence of the bee to examine straw after straw until he found
the object of his search.
I was a sorry witness of such doings, knowing that a little theory and calculation would have saved him ninety per cent of his labor.”
-Tesla
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cnidocyte
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The technical word for a compound that makes your eyes water is a lacrimator. I think the most potent lacrimator known to man is o-chlorobenzylidene
malononitrile. They don't call it tear gas for nothing. 
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The WiZard is In
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Quote: Originally posted by metalresearcher  | Whe slicing onions a nearly pungent odor appears which also generates tears. Leek has (in a lesser extent) the same effect.
Which chemicals are responsible for this ?
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Onions? Heck. Why do little girls smell like anchovies?!
Attachment: Vaginal Menstrual Cycle.pdf (768kB)
This file has been downloaded 599 times
Attachment: Vaginal Odors letter 2.pdf (315kB)
This file has been downloaded 425 times
djh
----
If the County Pervert Posse
calls — please deny all knowledge
of me.
djh - Was a member of —
The Society for the Scientific Study of Sex
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Ephoton
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BARFFF
e3500 console login: root
bash-2.05#
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franklyn
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While on the topic , why does flatulence stink ?
It's so deaf people can enjoy them too.
.
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aeacfm
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so does this lacrimator do that it self or react with air when the onion cut and do that ? i know strange question !!!
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hissingnoise
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So, what's with the post-coital loud vaginal raspberry-blowing stuff?
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The WiZard is In
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Don't know off hand. Sounds like a bad case of lack of lube.
As cunt(e) originally meant a hollow or empty space... air
perhaps.
I would bring this upon your attention, la articles contain reports of some interesting Amateur (self) Experimentation....!
djh
----
What do you call the
little cabin in the front
of the plane where the
female pilot sits?
Cuntpit.
www.sexscience.org
Welcome to the Society for the Scientific Study of Sexuality
The oldest professional society dedicated to the advancement of knowledge about sexuality
About SSSS
• Founded in 1957 to encourage the rigorous systematic study of sexuality.
• More than 700 individuals hold membership in the Society.
• SSSS is a non-profit professional membership organization.
• A strength of the Society is the range of disciplines represented by its members, conference participants and journal authors.
• Membership of the Society includes anthropologists, biologists, educators, historians, nurses, physicians, psychologists, sociologists,
theologians, therapists, and many other disciplines.
• The Society has a strong commitment to "the next generation" through the support of a vigorous student membership program.
• The Society's award program recognizes professional excellence, public service and service to The Society.
• A broad range of committee activity provides numerous opportunities for the involvement of members in the work of the Society.
PS — I have a PhD in gynecology via the picture study method.
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franklyn
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Only you can progress from onions to gynecology
and then not post that in the Biochemistry forum
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ScienceSquirrel
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Faire l'amour is a very personal experience.
If you both like it then it is OK.
[Edited on 22-12-2010 by ScienceSquirrel]
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Rich_Insane
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Allylic organosulfur compounds are irritants AND degrade to very dilute sulfuric acid.
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Rogeryermaw
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if it smells like fish it's a tasty dish. if it smells like cologne, leave it alone!!!
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DDTea
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| Quote: Originally posted by cnidocyte | | The technical word for a compound that makes your eyes water is a lacrimator. I think the most potent lacrimator known to man is o-chlorobenzylidene
malononitrile. They don't call it tear gas for nothing.
|
CS is one of the tear gasses and pretty much the standard one these days. However, CR is quite a bit more irritating than CS (http://en.wikipedia.org/wiki/CR_gas). Of course, OC is still even more irritating. They all have different flavors, basically 
| Quote: | Allylic organosulfur compounds are irritants AND degrade to very dilute sulfuric acid.
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Very interesting. Isn't the treatment for pink-eye to reduce the pH of the eye in order to kill the bacteria? I wonder if irritating the heck out
of your eyes by chopping onions could be an at-home treatment.
"In the end the proud scientist or philosopher who cannot be bothered to make his thought accessible has no choice but to retire to the heights in
which dwell the Great Misunderstood and the Great Ignored, there to rail in Olympic superiority at the folly of mankind." - Reginald Kapp.
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