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Date: Wed, 29 Jan 1997 20:17:54 +1100 (EST)
To: techdiver@aquanaut.com
From: David Strike <strikinc@oz*.co*.au*>
Subject: Re: Sink Hole Diving
Cc: atikkan@ix*.ne*.co*
On  Tue, 28 Jan 1997 23:38:29 -0800
EE Atikkan wrote:-

>Water and hydrogen sulfide R indeed very similar.
>
>Structurally H2S is similar to H2O
>
>H--O--H (slightly bent out of shape) vs H--S--H
>
>because chemically S & O are so similar.  (It's all in their electrons 2, 6
vs 2, 8, 6)
>
>Atomic weights are even in the synchrony - 16 vs 32 (OK so at times the
latter can glow in the dark) and, more noteworthy, their nascent forms have
the same molecular weight 32 (S vs O2).
>
>Inorganic formation:
>
>HCl + NaOH ====> NaCl + H2O
>
>HAc + Na2S ====> NaAc + H2S
>(well actually my chem teach had taught 
>CaS + MgCl2 + H2O ====> CaCl2 + Mg(OH)2 + H2s)
>
>Now when H2S comes into contact with water it forms hydrosulfurous acid.
(By the same token, water in aqueous media will from hydroaquoreous acid,
called aquaeum when very concentrated)
>
>Organically H2S can be formed by the enzymatic cleavage and transfer of
sulfhydryl groups ( -SH) to appropiate protons.
>
>-SH + H+  -----proto sulfhydryl transferase----> H2S
>
>Water can be formed by the enzymatic cleavage & transfer of hydroxyl
groups, say from phoroglucinol to protoen
>
>Phorogluconol ------1,3,5 benzene triol dehydroxylase----> Benzene + H20
>
>again requiring a proton to capture the OH- moeity.
>
>The chemical similarity between these compounds is obvious.
>
>
>Though H2S & H20 are so similar, they have vastly different effects on body.
>
>Human skin is impermeable to H2O. Yet that integument will allow H2S, as
hydrosulfurous acid, to permeate.  
>
>H2S reacts with Fe+++, forming Fe2S3, the Au of fools.
>Remembering that heme of blood has a Fe moeity, once the body comes into
contact with H2S the rx
>
>Fe+++ + S-- -------> Fe2S3 proceeds rapidly, converting blood to a slurry
of fool's Au, shiny, but worthless.
>
>At the same time H2S in water (1 gr/ca.200 ml) forms:
>H2S + H20 ----> S + H20
>
>Exposure to H2S will cause conjuctival rx & mucous membrane 
>inflammation, head ache, dizziness, lasstitude
>
>Regards
>
>Esat Atikkan

Esat! That's easy for you to say, but ....!!!  :-) 

Regards

Strike
-----------------------------------------------------------------------------
David Strike
Associate Publisher/Editor
Professional Diver Journal
PO Box 1128
Dee Why
NSW 2099
Australia

Tel.: +61 (2) 9971 2559
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e-mail: strikinc@oz*.co*.au*

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