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Old 01-03-2009   #18 (permalink)
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Re: The clay shards and pottery in TP What & Why?

Quote:
Originally Posted by mavrickjohn View Post
I tend to think that TP was created with Humanure because of the lack of nutrients in the tropics.
...and that same logic can be used to advocate for de-desertification in areas with marginal soils!
Great links. Thanks again:
===

I assume Ag means silver in this case:

Broad-spectrum in vitro antibacterial activities of clay minerals against antibiotic-susceptible and antibiotic-resistant bacterial pathogens -- Haydel et al. 61 (2): 353 -- Journal of Antimicrobial Chemotherapy
Results: One specific mineral, CsAg02, demonstrated bactericidal activity against pathogenic Escherichia coli, ... methicillin-resistant S. aureus (MRSA) ...and Mycobacterium smegmatis....

MRSA!
Hey! That's good news to spread around...

...and those other drug-resistant and common human strains too!
...and for folks with foreskins that last one would be relevant....

and speaking of Mycobacteria
Quote:
Originally Posted by John Innes Centre
The mycobacteria are unusual among bacteria in that they have an enormously thick, hydrophobic cell wall that prevents desiccation. Many mycobacteria are harmless and useful because they degrade organic matter in soil. Some are used industrially to help convert cheap plant sterols (sitosterol) into useful steroid hormones. ....
...hmmm, back to soil health:

googled: nano-silver

Synergistic antibacterial effects of beta-lactam antibiotic combined with silver nanoparticles
Informa Pharmaceutical Science - Expert Opinion on Therapeutic Patents - 15(2):125 - Summary

googled: nano-silver toxicity

Size Dependent and Reactive Oxygen Species Related Nanosilver Toxicity to Nitrifying Bacteria - Environmental Science & Technology (ACS Publications)
"The intrinsic slow growth of nitrifying bacteria and their high sensitivity to environmental perturbations often result in cell growth inhibition by toxicants. Nanoparticles are of great concern to the environment because of their small size and high catalytic properties."
===

Perhaps in "clay chamber pots" a high-silver clay would prevent biofilms from developing, but I'd think in the soil that it wouldn't inhibit too much activity, except on a very small scale or for certain (possibly many, but not all) microbes.

It's probably much wiser to have your silver bound up in shards, rather than having it dispersed in a dusting of nanoparticles, eh?
~

Last edited by Essay; 01-03-2009 at 05:56 PM..
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