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K. P. Kazymov - One of the best experts on this subject based on the ideXlab platform.
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Quality Assessment of Melanocratic Basalt for Mineral Fiber Product, Southern Urals, Russia
Natural Resources Research, 2015Co-Authors: A. Pisciotta, B. V. Perevozchikov, B. M. Osovetsky, E. A. Menshikova, K. P. KazymovAbstract:Basalt Fibers have recently come into the spotlight due to their superior physical and chemical properties, which rank only below expensive carbon and silicon carbide Fibers. The suitability of raw material for basalt Fiber production is mainly determined by the Mineral composition and crystallization properties of basalt melts. In this article, we present the results of integrated petrographic and Mineralogical analyses of melanocratic basalts from the Southern Urals, in order to assess their suitability for the production of high quality basalt Fibers. The low acidity and viscosity parameters indicate the possibility of producing brittle Fibers with poor chemical resistance. Moreover, the refractory impurities decrease the quality of products made from these Fibers. However, acceptable insulation properties are exhibited by the melanocratic basalts and therefore their significance in the construction industry is still high.
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quality evaluation of the kuluevskaya basalt outcrop for the production of Mineral Fiber southern urals russia
Energy Procedia, 2014Co-Authors: B V Perevozchikova, A. Pisciotta, B. M. Osovetsky, E A Menshikov, K. P. KazymovAbstract:Abstract More recently, a significant growth is observed in the manufacture of composite materials. Intensively developed polymer composite materials (PCM) are used in different sectors of industry and technology. They are successfully replacing traditional construction materials and also permit the conditions that exclude use of metals. Basalt Fiber is one of these materials, it have caught come into the spotlight due to their superior physical and chemical properties in which they only rank below expensive carbon and silicon carbide Fibers. The suitability of raw material for basalt Fiber production is mainly determined by the Mineral composition and crystallization properties of basalt melts. In this article, we present the results of an integrated petrographic and Mineralogical investigation of melanocratic basalts of the Kuluevskaya volcanic complex from the Southern Urals, in order to assess their suitability for the production of high quality basalt Fiber. The low acidity and viscosity parameters indicate the possibility of producing brittle Fibers with a poor chemical resistance. Moreover the redox state and content of iron in the basalt glasses determine high crystallization ability of basalt Fibers, it limits their application temperature and leads to low productivity of the BCF production process, but keeping acceptable insulation properties, hence their significance in the construction industry is high.
A. Pisciotta - One of the best experts on this subject based on the ideXlab platform.
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Quality Assessment of Melanocratic Basalt for Mineral Fiber Product, Southern Urals, Russia
Natural Resources Research, 2015Co-Authors: A. Pisciotta, B. V. Perevozchikov, B. M. Osovetsky, E. A. Menshikova, K. P. KazymovAbstract:Basalt Fibers have recently come into the spotlight due to their superior physical and chemical properties, which rank only below expensive carbon and silicon carbide Fibers. The suitability of raw material for basalt Fiber production is mainly determined by the Mineral composition and crystallization properties of basalt melts. In this article, we present the results of integrated petrographic and Mineralogical analyses of melanocratic basalts from the Southern Urals, in order to assess their suitability for the production of high quality basalt Fibers. The low acidity and viscosity parameters indicate the possibility of producing brittle Fibers with poor chemical resistance. Moreover, the refractory impurities decrease the quality of products made from these Fibers. However, acceptable insulation properties are exhibited by the melanocratic basalts and therefore their significance in the construction industry is still high.
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quality evaluation of the kuluevskaya basalt outcrop for the production of Mineral Fiber southern urals russia
Energy Procedia, 2014Co-Authors: B V Perevozchikova, A. Pisciotta, B. M. Osovetsky, E A Menshikov, K. P. KazymovAbstract:Abstract More recently, a significant growth is observed in the manufacture of composite materials. Intensively developed polymer composite materials (PCM) are used in different sectors of industry and technology. They are successfully replacing traditional construction materials and also permit the conditions that exclude use of metals. Basalt Fiber is one of these materials, it have caught come into the spotlight due to their superior physical and chemical properties in which they only rank below expensive carbon and silicon carbide Fibers. The suitability of raw material for basalt Fiber production is mainly determined by the Mineral composition and crystallization properties of basalt melts. In this article, we present the results of an integrated petrographic and Mineralogical investigation of melanocratic basalts of the Kuluevskaya volcanic complex from the Southern Urals, in order to assess their suitability for the production of high quality basalt Fiber. The low acidity and viscosity parameters indicate the possibility of producing brittle Fibers with a poor chemical resistance. Moreover the redox state and content of iron in the basalt glasses determine high crystallization ability of basalt Fibers, it limits their application temperature and leads to low productivity of the BCF production process, but keeping acceptable insulation properties, hence their significance in the construction industry is high.
B. M. Osovetsky - One of the best experts on this subject based on the ideXlab platform.
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Quality Assessment of Melanocratic Basalt for Mineral Fiber Product, Southern Urals, Russia
Natural Resources Research, 2015Co-Authors: A. Pisciotta, B. V. Perevozchikov, B. M. Osovetsky, E. A. Menshikova, K. P. KazymovAbstract:Basalt Fibers have recently come into the spotlight due to their superior physical and chemical properties, which rank only below expensive carbon and silicon carbide Fibers. The suitability of raw material for basalt Fiber production is mainly determined by the Mineral composition and crystallization properties of basalt melts. In this article, we present the results of integrated petrographic and Mineralogical analyses of melanocratic basalts from the Southern Urals, in order to assess their suitability for the production of high quality basalt Fibers. The low acidity and viscosity parameters indicate the possibility of producing brittle Fibers with poor chemical resistance. Moreover, the refractory impurities decrease the quality of products made from these Fibers. However, acceptable insulation properties are exhibited by the melanocratic basalts and therefore their significance in the construction industry is still high.
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quality evaluation of the kuluevskaya basalt outcrop for the production of Mineral Fiber southern urals russia
Energy Procedia, 2014Co-Authors: B V Perevozchikova, A. Pisciotta, B. M. Osovetsky, E A Menshikov, K. P. KazymovAbstract:Abstract More recently, a significant growth is observed in the manufacture of composite materials. Intensively developed polymer composite materials (PCM) are used in different sectors of industry and technology. They are successfully replacing traditional construction materials and also permit the conditions that exclude use of metals. Basalt Fiber is one of these materials, it have caught come into the spotlight due to their superior physical and chemical properties in which they only rank below expensive carbon and silicon carbide Fibers. The suitability of raw material for basalt Fiber production is mainly determined by the Mineral composition and crystallization properties of basalt melts. In this article, we present the results of an integrated petrographic and Mineralogical investigation of melanocratic basalts of the Kuluevskaya volcanic complex from the Southern Urals, in order to assess their suitability for the production of high quality basalt Fiber. The low acidity and viscosity parameters indicate the possibility of producing brittle Fibers with a poor chemical resistance. Moreover the redox state and content of iron in the basalt glasses determine high crystallization ability of basalt Fibers, it limits their application temperature and leads to low productivity of the BCF production process, but keeping acceptable insulation properties, hence their significance in the construction industry is high.
Victor L. Roggli - One of the best experts on this subject based on the ideXlab platform.
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Response to letter regarding “Talc and mesothelioma: Mineral Fiber analysis of 65 cases with clinicopathological correlation”
Ultrastructural Pathology, 2020Co-Authors: Victor L. Roggli, John M. Carney, Thomas A. Sporn, Elizabeth N. PavliskoAbstract:Tran and colleagues have taken issue with our use of control or reference ranges in our article regarding ‘Talc and Mesothelioma: Mineral Fiber Analysis of 65 Cases with Clinicopathological Correla...
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talc and mesothelioma Mineral Fiber analysis of 65 cases with clinicopathological correlation
Ultrastructural Pathology, 2020Co-Authors: Victor L. Roggli, John M. Carney, Thomas A. Sporn, Elizabeth N. PavliskoAbstract:Malignant mesothelioma is strongly associated with prior asbestos exposure. Recently there has been interest in the role of talc exposure in the pathogenesis of mesothelioma. We have analyzed lung ...
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Analysis of Tissue Mineral Fiber Content
Pathology of Asbestos-Associated Diseases, 2013Co-Authors: Victor L. Roggli, Anupama SharmaAbstract:The development of techniques for assaying the Mineral Fiber content of tissues has provided the opportunity to correlate the occurrence of various Fiber-related diseases with the cumulative Fiber burdens in the target organ. Exposure to Mineral Fibers generally occurs through the inhalation of airborne Fibers, and thus the respiratory tract is the site of most asbestos-related diseases. Consequently, most studies of tissue Fiber burdens have concentrated on the analysis of lung parenchyma [1]. It is the purpose of this chapter to review the various techniques which have been developed for the analysis of tissue Fiber burdens, noting the advantages and limitations of each. The morphologic, crystallographic, and chemical features of the various types of asbestos are reviewed in Chap. 1 and the structure and nature of asbestos bodies in Chap. 3. In addition, the relationship between tissue asbestos burden and the various asbestos-associated diseases (see Chaps. 4, 5, 6, and 7) and the various categories of occupational and environmental exposures (see Chap. 2) will also be explored in the present chapter. Finally, the overall contribution of the various types of asbestos and non-asbestos Mineral Fibers to the total Mineral Fiber burden will be discussed in relationship to the biological activity and pathogenicity of the various Fiber types.
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exposure to brake dust and malignant mesothelioma a study of 10 cases with Mineral Fiber analyses
Annals of Occupational Hygiene, 2003Co-Authors: Kelly J Butnor, Thomas A. Sporn, Victor L. RoggliAbstract:Objectives: A large number of workers in the USA are exposed to chrysotile asbestos through brake repair, yet only a few cases of malignant mesothelioma (MM) have been described in this population. Epidemiologic and industrial hygiene studies have failed to demonstrate an increased risk of MM in brake workers. We present our experience of MM in individuals whose only known asbestos exposure was to brake dust and correlate these findings with lung asbestos Fiber burdens. Methods: Consultation files of one of the authors were reviewed for cases of MM in which brake dust was the only known asbestos exposure. Lung Fiber analyses were performed using scanning electron microscopy (SEM) in all cases for which formalin-fixed or paraffinembedded lung tissue was available. Results: Ten cases of MM in brake dust-exposed individuals were males aged 51–73 yr. Nine cases arose in the pleura and one in the peritoneum. Although the median lung asbestos body count (19 AB/g) is at our upper limit of normal (range 0–20 AB/g), half of the cases had levels within our normal range. In every case with elevated asbestos Fiber levels by SEM, excess commercial amphibole Fibers were also detected. Elevated levels of chrysotile and non-commercial amphibole Fibers were detected only in cases that also had increased commercial amphibole Fibers. Conclusions: Brake dust contains exceedingly low levels of respirable chrysotile, much of which consists of short Fibers subject to rapid pulmonary clearance. Elevated lung levels of commercial amphiboles in some brake workers suggest that unrecognized exposure to these Fibers plays a critical role in the development of MM.
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asbestos content of lung tissue and carcinoma of the lung a clinicopathologic correlation and Mineral Fiber analysis of 234 cases
Annals of Occupational Hygiene, 2000Co-Authors: Victor L. Roggli, Linda L SandersAbstract:Abstract The aim of this study was to investigate the asbestos content of lung tissue in a series of patients with lung cancer and some history of asbestos exposure. This information was then correlated with demographic information, occupational and smoking history, presence or absence of pathologic asbestosis or pleural plaques, and pathologic features of the cancer. The pulmonary concentration of asbestos Fibers in 234 cases of primary carcinoma of the lung was determined by means of a tissue digestion technique. Asbestos body counts were performed in 229 cases and Fiber analysis by scanning electron microscopy in 221 cases. Asbestos content was recorded as total asbestos Fibers, commercial amphibole Fibers, noncommercial amphibole Fibers, and chrysotile Fibers 5 μm or greater in length per gram of wet lung tissue. The study group included 70 patients with asbestosis (Group I), 44 patients with parietal pleural plaques but without asbestosis (Group II), and 120 patients with neither (Group III). The median asbestos body content of Group I was more than 35 times greater than Group II and more than 300 times greater than Group III. The total asbestos Fiber count for Group I was nearly 20 times greater than Group II and more than 50 times greater than Group III. The difference was due almost entirely to commercial amphiboles. In a series of primary lung cancer cases with some history of asbestos exposure, a markedly elevated asbestos content was identified among those with pathologic asbestosis as compared with patients with pleural plaques alone or with neither plaques nor asbestosis.
Jun Kagawa - One of the best experts on this subject based on the ideXlab platform.
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acute biological effects of intratracheally instilled titanium dioxide whiskers compared with nonfibrous titanium dioxide and amosite in rats
Inhalation Toxicology, 1999Co-Authors: Yoko Ishihara, Norihiko Kohyama, Hiroko Kyono, Noriko Otaki, Fumio Serita, Tadao Toya, Jun KagawaAbstract:The dimensions of man-made Mineral Fiber whiskers are similar to those of some kinds of asbestos. Thus these Mineral Fibers raise the concern for potential health hazard for workers exposed in the occupational environments. This study was designed to define acute biological effects of intratracheally administered titanium dioxide whiskers (TO1) compared with nonfibrous titanium dioxide (TOP) and UICC amosite (Ams), and their relations to acute lung inflammation in rats. The observed geometric mean length (mum) and width (mum) and geometric standard deviation are: TO1(2.1[2.0], 0.14[1.53]); Ams (4.3[3.3], 0.31[1.9]); and TOP (50 nm, 1-2 mum aggregates). Ten-week-old Wistar-Jcl male rats received a single tracheal injection of test materials at doses between 0.05 and 1.0 mg/rat. Control animals were injected with the same volume of saline. Lung tissue and bronchoalveolar lavage (BAL) fluid were collected from rats on days 1, 3, and 7 after administration. In the group injected with TO1, total protein, cytok...