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DeRank : 3,59
DeAge™ : 7429 days • Here since 6 february 2006
Flipper Gone Fishin'
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I can say that 3/4 of a liter of honey grappa will give you an incredible whammy.
Dream Theater Black Clouds & Silver Lining
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... but I take pictures of artistic nudes...
Dream Theater Falling Into Infinity
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I don't know how to break things, I eat everything with pleasure, but those have always left me perplexed.
Dream Theater Black Clouds & Silver Lining
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I don't understand, well then I'll take pictures of the banknote, the falls, the lingerie, the blinders as big as the old ship Vittorio Veneto, the resistances, and of course everything else. >>> Ingrandisci questa immagine
Dream Theater Black Clouds & Silver Lining
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I don't think I'll commit suicide over this, anyway.
Dream Theater Black Clouds & Silver Lining
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I don't think I'll commit suicide over this, anyway.
Dream Theater Black Clouds & Silver Lining
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Moreover, I am not JUST a photographer... perhaps I have many more lessons to give, starting with intellectual honesty. Auf Wiedersen.
Dream Theater Black Clouds & Silver Lining
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Well... aside from the fact that you’re of age, it really doesn’t seem to me that I insulted anyone. It’s YOU who sees filth in every request; I think you’re a bit too biased, or paranoid. No more, no less than the shots you've already taken... just say no, you see, well-done nudes are a form of photographic art that is absolutely NOT vulgar; you don’t know me, you can’t insinuate what I have NEVER written. By the way, you are the one insulting me. Uhm, I think you have blinders as big as La Vittorio Veneto (which, by the way, was decommissioned years ago). Anyway, I'll look for someone else, have a good day ;)
Dream Theater Black Clouds & Silver Lining
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Why are you taking it out on the wrong person? I politely made a request, I didn't tell you to fuck off. Vent with someone else. If you already have experience in the field, all the better; it's not easy to find people who can pose naturally in photography. Ah...
Dream Theater Black Clouds & Silver Lining
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Mercaptans, or thiols, are organic compounds similar to alcohols in which the oxygen atom has been replaced by a sulfur atom; indeed, their general formula is R-SH. A common characteristic of almost all mercaptans is their intense unpleasant odor. Simple mercaptans are added to methane as "odorizers" to detect possible leaks. They are synthesized by treating alkyl halides with excess hydrosulfide ions HS-: R-X + HS- → R-SH + X-.
The oxidation of a thiol is a reversible process that leads to the formation of disulfides R-S-S-R: the disulfide bond is very important in some proteins; for example, hair can be straight or wavy as a consequence of structural variations due to disulfide bridges.
Like alcohols, their anions R-S- undergo nucleophilic addition and nucleophilic substitution reactions, but thiolates are better nucleophiles compared to alkoxides, since the larger size of sulfur compared to oxygen allows for the delocalization of the negative electric charge over a greater surface area and also fits the attack site better.
Due to the better electronic distribution of the thiolate ion, thiols are more acidic than their corresponding alcohols. This explains the pKa value of around 8-9 compared to that of alcohols (pKa around 17).
For the same reason, they are more reactive in nucleophilic reactions. A significant example is the use of 1,2-ethanedithiol for the protection of the carbonyl group of aldehydes and ketones in organic syntheses.