Although belated closure and reparation of the mines and imposition of threshold safety limits in the workplace will eventually stem this epidemic the death toll has not yet peaked. Amid- to late 20th century amphibole asbestos-related cancer epidemic has consequently struck not only mining and milling communities in producer countries, but many groups of workers (and their relatives and neighbours) exposed to amphibole asbestos-bearing materials in importer countries. Crocidolite mixed with chrysotile was commonly used in pressure pipes and gaskets, whereas amosite mixed with chrysotile was especially suitable for gut- ters, roofing, and insulation boards. Production peaked from 1966–1978 when around 2 million tons of crocidolite and1million tons of amosite were produced and exported to be used mainly in asbestos-based cement products and many types of building materials. Almost all amphibole asbestos sold on the world market was mined from Palaeoproterozoic ironstones in either the northern Cape Province (blue) or Trans- vaal (brown and blue) areas in South Africa. Therefore, despite the fact that asbestiformamphiboles comprise approximately 5%of industrially utilised asbestos (the rest being chrysotile), they have been disproportionately pathogenic. The long-term pres- ence of such fibres within and around the lungs can result in fibrous scarring, lung cancer, and is the major cause of the once extremely rare tumour known as diffuse malignant mesothelioma. Blue and brown asbestos fibres have a morphology and mineralogy which makes them more biopersistent and biochemically reactive than chrysotile (white asbestos). The most commonly utilised asbestiform amphiboles, crocidolite (blue asbestos) and amosite (brown asbestos), are implicated in a variety of diseases related to cell damage within the respiratory tract and adjacent areas.
The previous withholding status (i.e., formerly withheld in part or formerly withheld in full) is identified in the “Formerly Withheld Status” column.The risk to human health associated with the inhalation of amphibole asbestos has become devastatingly ap- parent this century. The files are sorted by NARA Release Date, with the most recent files appearing first.
BROWN NUMBER PRESS 611P DOWNLOAD
To view or download a specific document, follow the link in the "Doc Date" column. You can also download the spreadsheet as an Excel file (4.7MB). The table below displays metadata about all the released documents. This is due to the fact that the files were scanned in batches. * Note: There are instances where multiple record identification numbers are associated with the same pdf. December 15, 2017: 3,539 documents * (read press release).November 17, 2017: 10,744 documents (read press release).November 9, 2017: 13,213 documents (read press release).November 3, 2017: 676 documents (read press release).October 26, 2017: 2,891 documents (read press release).July 24, 2017: 3,810 documents (read press release).These releases include FBI, CIA, and other agency documents (both formerly withheld in part and formerly withheld in full) identified by the Assassination Records Review Board as assassination records.
BROWN NUMBER PRESS 611P FULL
The records at issue are documents previously identified as assassination records, but withheld in full or withheld in part. The vast majority of the Collection (88%) has been open in full and released to the public since the late 1990s. The National Archives is releasing documents previously withheld in accordance with the JFK Assassination Records Collection Act. Have a question about JFK Assassination Records? Ask it on HistoryHub!
0 kommentar(er)
