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Toxic dust
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NorCalluthier
Posts: 136
Joined: Apr. 16 2016
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Toxic dust
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Hello All, In looking up Manuel de la Chica's name to see for sure how to spell it, a short bio of him was available on the GSI website. Apparently he had to quit making guitars because of the dust's ruining his health. If I'm properly informed, that happened to Marcelo Barbero and his son as well---and who knows how many others. I lost a month's work due to inhaling some fine cypress dust. All I had strength to do was to sit at the computer, and research dust control. The most important thing I learned was that a shop-vac inside the shop is nothing more than a fine dust concentrator, and the fine dust is the worst stuff for your lungs. The filters in the vacuums are not perfect in the first place, and they soon get perforated by chips from routers, table saws etc. My solution was to re-locate a couple of Sears 6.5 hp shop vacs outside the back wall of my shop, and run shop-vac pipe under the floor and up into the shop---got rid of the noise too. I have the great good fortune of living in a very mild coastal climate, so the loss of heat during the winter is not a problem for me. So, "Be ye informed!" Part of the reason that I chose lutherie as a life's work is that I figured I could do it until I went out of my shop feet first. I'm not planning on doing that until I'm well into my nineties (;->)... Cheers, Brian
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REPORT THIS POST AS INAPPROPRIATE |
Date Apr. 12 2019 18:21:38
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kitarist
Posts: 1715
Joined: Dec. 4 2012
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RE: Toxic dust (in reply to JasonM)
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quote:
ORIGINAL: JasonM I can’t read the PubMed article. Over how long were the subjects exposed to dust? Link to free pdf : https://onlinelibrary.wiley.com/doi/epdf/10.1002/ijc.31015 Since this is statistical study using census data, it should be read more like it is about increased risks by profession. The way they calculate cumulative exposure is as follows: Take the proportion of workers in a profession who have annual exposure to wood dust which is at least 0.1mg/m^3 on average, over their entire work life, and multiply that by the number of years this went on. So if you want to roughly try to figure out something, you would have to come up with (A) annual mean wood dust concentration (mg wood dust per cubic metre) average for the entire work period, and (B) years working, and multiply A and B. A*B is what they display in the second column e.g. with 28.82 or more for "High" cumulative exposure. The way to read the Hazard ratio is that they take the ratio of Cases:Controls for "No exposure", call it "1", and then check how many times higher is the ratio by exposure category, compared to that of "no exposure". Oh, these are incidences after a 10-yr latent period. For example, for the high category, a hazard ratio of 28.86 means the nasal adenocarcinoma cancer is 28.86 times more frequent in that category than in the "no exposure" category.
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Konstantin
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REPORT THIS POST AS INAPPROPRIATE |
Date Apr. 13 2019 19:44:58
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