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From: <a hre
Hi Steve & All, Nov 23, 2015
In all such questions one should not overlook the obvious: such as
typical maximum concentrations of HCN encountered and decay rates.
Cyanogenic glycosides (chemicals which can release HCN) are fairly
common in plant tissues and even in food used by humans; sometimes in very
high concentrations before special treatment. The following includes an
overview in foods.
http://www.foodsafety.govt.nz/elibrary/industry/Cyanogenic_Glycosides-Toxin_Which.pdf
But getting back to plant tissues in general; because HCN is widely
toxic and widely present in plant tissues in bound form it seems logical
that the decay rate of free HCN in natural systems must be relatively rapid.
Wilted cherry leaves can kill cattle but cherry leaf litter does not
generate a dead zone.
Yt, DW. Kentville
----- Original Message -----
From: "Stephen Shaw" <srshaw@Dal.Ca>
To: <naturens@chebucto.ns.ca>
Sent: Monday, November 23, 2015 3:40 PM
Subject: RE: [NatureNS] sparrows and CN-
> Andrew: Never heard of it, but if you simply dial 'cyanide in road salt'
> into Google, this springs lots of references. It's not 'cyanide' as in
> lethal HCN or NaCN, but the less toxic salt sodium ferrocyanide that's
> used as the anti-caking agent -- apparently lots of it.
> A couple of the references point out, however, that in certain situations
> (e.g. acidic conditions and strong sunlight), some of this ferrocyanide in
> the run-off melt will break down to liberate cyanide ions (CN-) which are
> soluble and highly toxic. Scary.
> Steve
> ________________________________________
> From: naturens-owner@chebucto.ns.ca [naturens-owner@chebucto.ns.ca] on
> behalf of Hebda, Andrew J [Andrew.Hebda@novascotia.ca]
> Sent: Monday, November 23, 2015 1:23 PM
> To: naturens@chebucto.ns.ca
> Subject: RE: [NatureNS] sparrows
>
>>From some of the recent Amphibian work being undertaken, it was suggested
>>that there are cyanide-base anti-caking agents used in road salt. Has
>>anyone come across reference to that?
>
> A H
> ________________________________________
> From: naturens-owner@chebucto.ns.ca [naturens-owner@chebucto.ns.ca] on
> behalf of Laviolette, Lance [lance.laviolette@lmco.com]
> Sent: November-23-15 12:15 PM
> To: naturens@chebucto.ns.ca
> Subject: RE: [NatureNS] sparrows
>
> No question Paul. It’s a not often considered environmental hazard of
> highways and roads.
>
> Lance
>
> From: naturens-owner@chebucto.ns.ca [mailto:naturens-owner@chebucto.ns.ca]
> On Behalf Of rita.paul@ns.sympatico.ca
> Sent: Saturday, November 21, 2015 11:16 AM
> To: naturens@chebucto.ns.ca
> Subject: EXTERNAL: RE: [NatureNS] sparrows
>
> One thing not mentioned in the discussion Lance was the use of
> road salt. It very effectively wiped out the Hungarian Partridge on PEI.
> They went from plentiful to rare in a few years after salt came into use.
> They would get gravel for grit along the road and pick up salt.
> The same may have happened to House Sparrows also - come to think of
> it rats - the Norway kind - have had an unlamented decline also.
> All 3 species are of the invasive kind. The history of most invasive
> species is
> that they thrive for a time and then die down.
> Enjoy the November rain
> Paul
>
>
> -----
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