barclay
has rocks in the head
Lowly Padawan of rocks
Member since November 2011
Posts: 510
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Post by barclay on May 28, 2014 22:55:45 GMT -5
The jury is still out on SV40. From our friends at the Journal of Virology, "Although detection of SV40 DNA by PCR for particular cancers (e.g., mesotheliomas and NHL) may reach 30 to 40% of cases, the lack of detectable SV40 DNA or LT in every cell of these tumors distinguishes the association from the recognized etiologic connection of high-risk human papillomaviruses with cervical cancer or Epstein-Barr virus with lymphoproliferative lesions in immunocompromised individuals (89, 131). This lack of uniform presence of the viral DNA, coupled with concerns about PCR techniques, a past history of negative associations, the litigious cloud of contaminated poliovirus vaccines, a paucity of information on the SV40 life cycle in relevant human cell types, and a scientific culture now emphasizing oncogenes rather than oncoviruses, have made the existence of SV40 in humans, let alone its causality in disease, a “hard sell.” and " Mesothelioma samples from Finland, where contaminated poliovirus vaccines were not administered, are negative for SV40 DNA (46). A recent study of a Turkish community with a very high frequency of mesothelioma linked to environmental asbestos exposure also found no evidence for SV40 DNA in the tumors from this unvaccinated population (30). Thus, SV40 DNA is only found in mesotheliomas in areas of the world where the contaminated vaccines were used, indirectly suggesting a link between SV40 and the cancer". Even if asbestos is a co-factor exposure to it is something we can control or minimize. Short of locking ourselves in a plastic bubble there is no way to definitively protect ourselves from a virus. When you mix smoking with asbestos exposure the cancer risk goes up by a factor of 10 as I recall. Smoking is something we can control. George Burns lived to 100 smoking cigars while some smokers die in their 40s or 50s from lung cancer. The prudent person does not smoke and hope they have the lungs of George Burns.
By the way, for those of you who lick rocks check out how many of your favorite colorful rocks get their color from toxic metals such as beryllium in Tiffany stone, manganese in rhodenite and rhodocrosite, copper in malachite, azurite and chrysocolla. Also remember that Mother Nature rarely gives us pure minerals so along with that copper you could be sucking on some lead, cadmium, chromium and arsenic.
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Post by Pat on May 28, 2014 22:59:03 GMT -5
Yep, a spray bottle is a good invention......
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Post by mohs on May 28, 2014 23:51:58 GMT -5
George Burns lung & Betty Davis eyes that sums me up now where did I put that piece of uranium ?
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Post by vegasjames on May 29, 2014 0:43:11 GMT -5
The jury is still out on SV40. From our friends at the Journal of Virology, "Although detection of SV40 DNA by PCR for particular cancers (e.g., mesotheliomas and NHL) may reach 30 to 40% of cases, the lack of detectable SV40 DNA or LT in every cell of these tumors distinguishes the association from the recognized etiologic connection of high-risk human papillomaviruses with cervical cancer or Epstein-Barr virus with lymphoproliferative lesions in immunocompromised individuals (89, 131). This lack of uniform presence of the viral DNA, coupled with concerns about PCR techniques, a past history of negative associations, the litigious cloud of contaminated poliovirus vaccines, a paucity of information on the SV40 life cycle in relevant human cell types, and a scientific culture now emphasizing oncogenes rather than oncoviruses, have made the existence of SV40 in humans, let alone its causality in disease, a “hard sell.” and " Mesothelioma samples from Finland, where contaminated poliovirus vaccines were not administered, are negative for SV40 DNA (46). A recent study of a Turkish community with a very high frequency of mesothelioma linked to environmental asbestos exposure also found no evidence for SV40 DNA in the tumors from this unvaccinated population (30). Thus, SV40 DNA is only found in mesotheliomas in areas of the world where the contaminated vaccines were used, indirectly suggesting a link between SV40 and the cancer". Even if asbestos is a co-factor exposure to it is something we can control or minimize. Short of locking ourselves in a plastic bubble there is no way to definitively protect ourselves from a virus. When you mix smoking with asbestos exposure the cancer risk goes up by a factor of 10 as I recall. Smoking is something we can control. George Burns lived to 100 smoking cigars while some smokers die in their 40s or 50s from lung cancer. The prudent person does not smoke and hope they have the lungs of George Burns. Presence of simian virus 40 sequences in malignant mesotheliomas and mesothelial cell proliferations. J Cell Biochem 1999 Dec;76(2):181-8 The relationship between simian virus 40 and mesothelioma. Curr Opin Pulm Med. 2008 Jul;14(4):316-21 A multi-institutional study confirms the presence and expression of simian virus 40 in human malignant mesotheliomas. Cancer Res. 1998 Oct 15;58(20):4505-9 SV40-like DNA sequences in pleural mesothelioma, bronchopulmonary carcinoma, and non-malignant pulmonary diseases. J Pathol. 1998 Mar;184(3):252-7 Thorax. 1996 Nov;51(11):1074-6 SV40 enhances the risk of malignant mesothelioma among people exposed to asbestos: a molecular epidemiologic case-control study. Cancer Res. 2005 Apr 15;65(8):3049-52 SV40 multiple tissue infection and asbestos exposure in a hyperendemic area for malignant mesothelioma. Cancer Res. 2007 Sep 15;67(18):8456-9 SV40 enhances the risk of malignant mesothelioma among people exposed to asbestos: a molecular epidemiologic case-control study. Cancer Res. 2005 Apr 15;65(8):3049-52 Asbestos and SV40 in malignant pleural mesothelioma from a hyperendemic area of north-eastern Italy. Tumori. 2012 Mar-Apr;98(2):210-4 Evaluation of simian virus-40 as a biological prognostic factor in Egyptian patients with malignant pleural mesothelioma. Pathol Int. 2007 Aug;57(8):493-501 Simian virus 40 large T antigen (SV40LTAg) primer specific DNA amplification in human pleural mesothelioma tissue. Thorax. 1996 Nov;51(11):1074-6
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Deleted
Deleted Member
Member since January 1970
Posts: 0
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Post by Deleted on May 29, 2014 9:07:17 GMT -5
now where did I put that piece of uranium ? HereIt's pretty
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gemfeller
Cave Dweller
Member since June 2011
Posts: 4,013
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Post by gemfeller on May 29, 2014 12:16:59 GMT -5
If you're out doing some rock-hunting and run across petrified wood with this kind of yellow showing it might be best to either treat it as Leaverite or stake a uranium mining claim. It's the highly radioactive mineral carnotite and much is found in petrified wood.
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gemfeller
Cave Dweller
Member since June 2011
Posts: 4,013
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Post by gemfeller on May 29, 2014 12:25:13 GMT -5
George Burns lung & Betty Davis eyes that sums me up now where did I put that piece of uranium ? Yeah Ed, I've got some blue tiger's-eye to cut (crocidolite.) Pray for me.
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Post by beefjello on May 29, 2014 19:15:52 GMT -5
if you choose to get rid of them send my way...mostly I got a chunk of rock from Beef that is chrystotile (sp) it as these really cool silicified asbestos lines in it added This a large chunk of Chrysotile I believe it’s related to serpentines…mostly I’m sure those are asbestos fiber that are silicified I’ll never cut the rock probably So won’t know if its just a surface phenomena. Hey Ed, found that stuff near Reynold's Creek up by Young with @azrockgeek . Some of it is pretty well silicified.. some not so much. And yea, it's more than just surface phenomena. Mostly
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Post by snowmom on May 30, 2014 5:13:15 GMT -5
we have a lot of it around here, too, find it in the gravel and the Lake fairly often.It comes in green quartz material here, probably originally was serpentine until the glaciers and lakes get ahold of it. Sometimes the rock around it has almost completely eroded so the fiber construct is the only thing left. Interesting stuff. I have a couple pieces just because it is interesting, all the rest I find is leaverite.
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Post by 1dave on May 31, 2014 11:00:51 GMT -5
we have a lot of it around here, too, find it in the gravel and the Lake fairly often.It comes in green quartz material here, probably originally was serpentine until the glaciers and lakes get ahold of it. Sometimes the rock around it has almost completely eroded so the fiber construct is the only thing left. Interesting stuff. I have a couple pieces just because it is interesting, all the rest I find is leaverite. You may want to take a closer look at that "green quartz." It could be jade. See the article I wrote about jade in "Location, Location, Location. Without serpentine, there would be no jade. Serpentine is found world wide and if it was that big of a problem we would all be dead. I suspect most horror stories as being attempts to get grant funds.
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Post by jakesrocks on May 31, 2014 11:21:16 GMT -5
If you're out doing some rock-hunting and run across petrified wood with this kind of yellow showing it might be best to either treat it as Leaverite or stake a uranium mining claim. It's the highly radioactive mineral carnotite and much is found in petrified wood.
So that's why my storage shed glows at night.
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Post by mohs on May 31, 2014 11:52:32 GMT -5
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Fossilman
Cave Dweller
Member since January 2009
Posts: 20,709
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Post by Fossilman on May 31, 2014 12:26:08 GMT -5
I was taught by my Uncles years ago to treat every rock as toxic,it makes a person more aware of his or her's health when cutting grinding and working rocks,minerals and (or) fossils... I wear mouth masks and sometimes goggles on a lot of material...I also wash all my work clothes every time I finish working with rocks... Better safe than sorry...
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Post by 1dave on May 31, 2014 13:01:40 GMT -5
Working construction, I was around a LOT of asbestos, drilling holes through asbestos panels for welding booths, ceiling tiles, etc. Around 1980 an x-ray of my lungs showed they were filled with asbestos fibers, but after testing in the 90's they said I had lost 30% of my lung capacity, but I could still crawl so I did not have asbestosis!
I retired and moved to Southern Utah expecting to die PDQ. Latest x-rays are clear, and I'm doing well, so you can get the fibers out!
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miander
spending too much on rocks
Searching for the shop of my dreams...
Member since November 2013
Posts: 407
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Post by miander on Jun 1, 2014 8:51:26 GMT -5
Wow, you are a lucky man 1dave! Thank you for sharing your story with us, especially those of us that have not been as careful as fossilman. What an inspirational and informative post. I am thankful that you are here with us and sharing your love of rocks and inspiring resilience.
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Post by radio on Jun 1, 2014 13:31:20 GMT -5
I know of one dirt road in the Sierra foothills that the Goobernment closed because it ran right through a huge serpentine deposit and they claimed that traffic released the fibers into the air and it posed a health threat. I remember driving Highway 49 near Coulterville, Ca after a rain and saw a huge road cut that just shimmered and glistened like crazy! After getting into rock hounding I figured out it was Serpentine. I spent many an hour near there digging in the creeks Gold prospecting Talking about scarred lungs, every time I have a chest X ray the techs freak out big time because my X rays look like I have a couple loads of #8 birdshot in my lungs! When I was in my late 20's I contracted a bad case of Histoplasmosis and never went to the doctor until I passed out one day. As a result of my procrastination, I have massive scarring of the lungs and a lot of reduced air capacity
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gemfeller
Cave Dweller
Member since June 2011
Posts: 4,013
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Post by gemfeller on Jun 1, 2014 14:26:06 GMT -5
I know of one dirt road in the Sierra foothills that the Goobernment closed because it ran right through a huge serpentine deposit and they claimed that traffic released the fibers into the air and it posed a health threat. Is that the road to the Benitoite diggings? That was the reason they gave for closing the road. I understand it was reopened recently.
When I first took up jewelry casting it was common practice to use wet asbestos sheet to line flasks before pouring investment, presumably to prevent cracking during burn-out. Later, as concerns about asbestos grew, we learned it wasn't necessary. But I've quenched many a hot flask that released clouds of steam that probably contained lots of asbestos along with sharp particles of cristobalite (crystalline silica). The cristobalite has become a concern as well because people exposed to a lot of it (commercial casting operators) are at risk of silicosis. Now silica-free investment powders are available.
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Post by radio on Jun 1, 2014 14:40:49 GMT -5
I know of one dirt road in the Sierra foothills that the Goobernment closed because it ran right through a huge serpentine deposit and they claimed that traffic released the fibers into the air and it posed a health threat. Is that the road to the Benitoite diggings? That was the reason they gave for closing the road. I understand it was reopened recently.
Nope. This one is just off 120 highway near Chinese Camp, Ca. No Benitoite anywhere near there that I am aware of. This road led back to an old gravel quarry and there were some interesting rocks back there. a bit of gold too :-)
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miander
spending too much on rocks
Searching for the shop of my dreams...
Member since November 2013
Posts: 407
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Post by miander on Jun 2, 2014 21:39:19 GMT -5
Dang Radio, I'm sorry about the state of your lungs . Thank you for sharing your experience for us to learn from.
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