10th Anniversary Critical Review: Naturally occurring asbestos

2008 ◽  
Vol 10 (12) ◽  
pp. 1394 ◽  
Author(s):  
Martin Harper
Keyword(s):  
Critical Review ◽  
10Th Anniversary ◽  
Naturally Occurring ◽  
Naturally Occurring Asbestos

scholarly journals A Metasurfaces Review: Definitions and Applications

2019 ◽  
Vol 9 (13) ◽  
pp. 2727 ◽  
Author(s):  
Syed S. Bukhari ◽  
J(Yiannis) Vardaxoglou ◽  
William Whittow
Keyword(s):  
Critical Review ◽  
Frequency Selective Surfaces ◽  
Low Loss ◽  
Naturally Occurring ◽  
Manufacturing Complexity ◽  
Non Linear ◽  
Phase Discontinuity ◽  
Wavefront Shaping ◽  
Salient Features ◽  
Planar Metamaterials

This paper is a critical review of metasurfaces, which are planar metamaterials. Metamaterials offer bespoke electromagnetic applications and novel properties which are not found in naturally occurring materials. However, owing to their 3D-nature and resonant characteristics, they suffer from manufacturing complexity, losses and are highly dispersive. The 2-dimensional nature of metasurfaces allows ease of fabrication and integration into devices. The phase discontinuity across the metasurface offers anomalous refraction, thereby conserving the good metamaterial properties while still offering the low-loss characteristics. The paper discusses salient features and applications of metasurfaces; wavefront shaping; phase jumps; non-linear metasurfaces; and their use as frequency selective surfaces (FSS).

Impacts of land use on spatial distribution of mortality rates of cancers caused by naturally occurring asbestos

2012 ◽  
Vol 22 (5) ◽  
pp. 516-521 ◽  
Author(s):  
Binggan Wei ◽  
Xianjie Jia ◽  
Bixiong Ye ◽  
Jiangping Yu ◽  
Biao Zhang ◽  
...  
Keyword(s):  
Land Use ◽  
Spatial Distribution ◽  
Mortality Rates ◽  
Naturally Occurring ◽  
Naturally Occurring Asbestos

scholarly journals Impact of Naturally Occurring Asbestos on Asbestos Ban: Regulations and Experience of the Republic of Korea

2022 ◽  
Vol 19 (2) ◽  
pp. 742
Author(s):  
Jiwoon Kwon
Keyword(s):  
Preventive Measures ◽  
Control Measures ◽  
Exposure Risk ◽  
Close Collaboration ◽  
Mineral Particles ◽  
Naturally Occurring ◽  
Transmission Electron ◽  
The Future ◽  
Naturally Occurring Asbestos ◽  
The Republic

This review examined the main issues debated in Korea regarding the production and use of materials containing naturally occurring asbestos (NOA) as impurities, and investigated the impacts of these debates on the asbestos ban, as well as the future implications. In Korea, incidents associated with the production and use of NOA-contaminated talc powders, construction rocks, serpentinites, and dolomite rocks raised public concern and led to accelerating the ban on asbestos. The main controversies concern policies on appropriate asbestos content limits, whether materials containing a trace amount of NOA should be banned, and the control of materials with high human exposure risk. To address recurring controversies, the implementation of preventive measures to manage elongated mineral particles and the use of transmission electron microscopy for more sensitive analysis need to be discussed, along with reaching social agreement on the controversial policies. To minimize the potential exposure to asbestos that may occur during the production and use of industrial minerals in the future, it is necessary to apply occupational exposure control measures and monitor the health effects of the relevant population groups. These national policies on NOA should be prepared based on close collaboration and discussion with policymakers, industry stakeholders, and related academic experts.

Overview of Naturally Occurring Asbestos in California and Southwestern Nevada

2020 ◽  
Vol 26 (1) ◽  
pp. 9-14
Author(s):  
R. Mark Bailey
Keyword(s):  
Sierra Nevada ◽  
North American ◽  
Volcanic Belt ◽  
Island Arc ◽  
North American Plate ◽  
Mountain Range ◽  
The North ◽  
Rock Types ◽  
Naturally Occurring ◽  
Naturally Occurring Asbestos

ABSTRACT Naturally occurring asbestos (NOA) is being discovered in a widening array of geologic environments. The complex geology of the state of California is an excellent example of the variety of geologic environments and rock types that contain NOA. Notably, the majority of California rocks were emplaced during a continental collision of eastward-subducting oceanic and island arc terranes (Pacific and Farallon plates) with the westward continental margin of the North American plate between 65 and 150 MY BP. This collision and accompanying accretion of oceanic and island arc material from the Pacific plate onto the North American plate, as well as the thermal events caused by emplacement of the large volcanic belt that became today's Sierra Nevada mountain range, are the principal processes that produced the rocks where the majority of NOA-bearing units have been identified.

Naturally occurring asbestos in an alpine ophiolitic complex (northern Corsica, France)

2019 ◽  
Vol 78 (17) ◽  
Author(s):  
Didier Lahondère ◽  
Florence Cagnard ◽  
Guillaume Wille ◽  
Jéromine Duron
Keyword(s):  
Naturally Occurring ◽  
Naturally Occurring Asbestos ◽  
Ophiolitic Complex

scholarly journals Naturally Occurring Asbestos in Argentina: A Compilation of Case Studies

2018 ◽  
pp. 169-174
Author(s):  
Lescano Leticia ◽  
Locati Francisco ◽  
Marfil Silvina ◽  
Sfragulla Jorge ◽  
Bonalumi Aldo ◽  
...  
Keyword(s):  
Case Studies ◽  
Naturally Occurring ◽  
Naturally Occurring Asbestos

Does Exposure to Naturally Occurring Asbestos (NOA) During Dam Construction Increase Mesothelioma Risk?

2020 ◽  
Vol 26 (1) ◽  
pp. 29-33
Author(s):  
Daniel W. Hernandez
Keyword(s):  
Construction Project ◽  
Current Understanding ◽  
Dam Construction ◽  
Mining Operations ◽  
Protective Measures ◽  
Mineral Fibers ◽  
Mineral Particles ◽  
Naturally Occurring ◽  
Naturally Occurring Asbestos ◽  
Compare And Contrast

ABSTRACT The Calaveras Dam Replacement Project, a major construction project completed in 2019, involved hundreds of workers using heavy earth-moving equipment and mining operations, including blasting, drilling, rock crushing, and other operations designed to move millions of cubic yards of earth. Much of the material was composed of serpentinite, blueschist, and other rocks that contain chrysotile and a variety of amphibole minerals, including glaucophane, winchite, actinolite, tremolite, and other asbestos-related amphiboles. This article explores the unique characteristics of the blueschist that required extensive protective measures to be undertaken by the contractor to protect workers and surrounding sensitive receptors. This article will provide an overall summary of the dimensional characteristics of the airborne blueschist elongate mineral particles encountered during construction activities to compare and contrast current understanding of cleavage fragments versus asbestiform mineral fibers.

Environmental contamination by naturally occurring asbestos (NOA): Analysis of sentinel animal lung tissue

2020 ◽  
Vol 745 ◽  
pp. 140990
Author(s):  
Antonella Campopiano ◽  
Annapaola Cannizzaro ◽  
Angelo Olori ◽  
Federica Angelosanto ◽  
Maria Rosaria Bruno ◽  
...  
Keyword(s):  
Lung Tissue ◽  
Environmental Contamination ◽  
Naturally Occurring ◽  
Naturally Occurring Asbestos ◽  
Sentinel Animal
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