[Stoves] ***SPAM*** Re: ***SPAM*** RE: Stoves Digest, Vol 93, Issue 5

[Xavier Brandao]

Dear Philip,

 

OK, what I read was regarding nanoparticles, so less than 0.1µ.

 

I was trying to understand Crispin’s sentence:

”particles are too small to be impacted and stick in the lungs, and only enter the body by diffusion, like gases. Small particles are inhaled and exhaled again.”

 

Please bear with me, so if I understand correctly:

·         From 2.5 to 0.5 micron particles : they are impacted and stick to the lungs

·         0.5, 0.4 (and below?): they start behaving like a gas, retention in the lungs is very low, and they are inhaled and exhaled again?

·         Less to 0.1 (nanoparticles): they go directly to the bloodstream?

 

The INSERM has found metal oxide nanoparticles in lung tissue sections of welders lungs. The welders had lung alterations. The researchers tried to confirm if the metal oxide nanoparticles could have an effect on health. So they tested it on rats. They concluded there is a potential risk for respiratory health:

https://www.tandfonline.com/doi/abs/10.1080/17435390.2016.1242797?src=recsys <https://www.tandfonline.com/doi/abs/10.1080/17435390.2016.1242797?src=recsys&journalCode=inan20> &journalCode=inan20 

 

Best,


Xavier

 

De : Stoves [mailto:stoves-bounces at lists.bioenergylists.org] De la part de Philip Lloyd
Envoyé : dimanche 20 mai 2018 21:01
À : 'Discussion of biomass cooking stoves'
Objet : Re: [Stoves] ***SPAM*** Re: ***SPAM*** RE: Stoves Digest, Vol 93, Issue 5

 

Dear Xavier

 

The question is – what capture mechanism can you dream up for a sub 0.5 micron particle?  It behaves just like a gas, has effectively no momentum. So how does it “penetrate the body”? That is NOT true for 2,5-0.5 micron particles – their kinetic energy at normal temperatures is enough to allow them to interact with the stuff we are made of.  

 

Philip



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