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Journal articles on the topic 'Chamote'

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Published: 4 June 2021

Last updated: 1 February 2022

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Melo, M. M. de, A. S. Pinheiro, R. M. Nascimento, A. E. Martinelli, R. P. S. Dutra, and M. A. F. Melo. "Análise microestrutural de misturas cerâmicas de grês porcelanato com adição de chamote de telhas cerâmicas." Cerâmica 55, no. 336 (2009): 356–64. http://dx.doi.org/10.1590/s0366-69132009000400004.

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A necessidade de reutilizar e reciclar rejeitos e resíduos tem exigido das indústrias cerâmicas novas posturas diante do processo de fabricação e seleção de suas matérias-primas. A indústria de telhas de cerâmica vermelha, apesar de constante progresso, ainda não consegue evitar a grande produção de rejeitos oriundos de processamento deficiente de seus produtos, principalmente na etapa de queima. Produtos super-queimados, trincados, quebrados, sem uniformidade de geometria ou de cores, muitas vezes são descartados em aterros, causando prejuízo ambiental. Além disso, há o desperdício de energia, matéria-prima e mão-de-obra, utilizadas na fabricação de produtos não comercializáveis. Em muitas empresas, tais produtos chegam a representar cerca de 20% de sua produção mensal. Os produtos descartados podem ser reutilizados na produção de cerâmicas, inclusive com maior valor agregado, como grês porcelanato, desde que se conheça seu comportamento quando adicionado à massas cerâmicas. O presente trabalho tem como objetivo estudar o desenvolvimento microestrutural de massas para grês porcelanato contendo rejeitos de telhas, ou chamote. Foram selecionadas duas formulações conhecidas, uma para grês porcelanato e outra para grês, e adicionados teores de chamote de 10%, 20% e 30%. Três temperaturas de queima foram estudadas, 1150 ºC, 1200 ºC e 1250 ºC com taxa de aquecimento de 10 ºC/min. Amostras sinterizadas com e sem chamote foram avaliadas quanto à sua microestrutura, absorção de água e porosidade aparente. Tanto a massa para grês porcelanato como para grês tiveram absorção de água reduzida coma adição de chamote. A massa para grês com adição de 30% de chamore e queimada a 1250 ºC passou a ser considerada grês porcelanato, por ter apresentado absorção de água inferior a 0,5%. O chamote por sua composição mineralógica pode auxiliar na redução da quantidade de matérias-primas fundentes tradicionais, como feldspato e talco, exigidas na fabricação de grês porcelanato.

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Vieira, C. M. F., E. T. A. de Souza, and S. N. Monteiro. "Efeito da incorporação de chamote no processamento e microestrutura de cerâmica vermelha." Cerâmica 50, no. 315 (2004): 254–60. http://dx.doi.org/10.1590/s0366-69132004000300013.

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Este trabalho tem por objetivo avaliar o efeito da incorporação de chamote, obtido de rejeitos de tijolos queimados em baixas temperaturas, em massa de cerâmica vermelha visando à obtenção de telhas. Inicialmente o chamote foi submetido a ensaios de caracterização química, física e mineralógica. Em seguida, foram feitas adições de chamote a uma argila caulinítica nas proporções de 0, 5, 10, e 20% em peso. Foram preparados corpos-de-prova por extrusão para queima em forno industrial a 970 ºC. As propriedades tecnológicas avaliadas foram: absorção de água, retração linear e tensão de ruptura à flexão. A microestrutura das composições foi avaliada através de ensaios de porosimetria de mercúrio e microscopia eletrônica de varredura. Os resultados indicaram que a incorporação de chamote melhorou os parâmetros de secagem da cerâmica. Após queima, a porosidade praticamente não sofreu variações significativas com a incorporação de chamote. Isto indica que a queima de chamote em temperaturas superiores àquela em que ele foi obtido, propicia sua própria sinterização e não ocasiona alterações degenerativas na microestrutura das cerâmicas queimadas.

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Gouveia, F. P., and R. M. Sposto. "Incorporação de chamote em massa cerâmica para a produção de blocos: um estudo das propriedades físico-mecânicas." Cerâmica 55, no. 336 (2009): 415–19. http://dx.doi.org/10.1590/s0366-69132009000400012.

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Este trabalho apresenta um estudo das propriedades físico-mecânicas de massas cerâmicas com a incorporação de chamote visando a sua futura utilização na produção de blocos. Primeiramente foi feita a caracterização química e mineralógica, a análise granulométrica e a determinação dos limites de Atterberg da argila e do chamote. Em seguida, foram produzidos corpos de prova por extrusão, contendo argila pura e três composições de mistura, nas proporções de 5, 10, 15 e 20% em massa de chamote. A queima foi realizada em forno tipo mufla nas temperaturas de 850, 950 e 1050 ºC. As propriedades físico-mecânicas avaliadas foram: absorção de água, porosidade aparente, retração linear e tensão de ruptura à flexão. Como resultados principais, concluiu-se que: a) a incorporação de chamote acarretou aumento na taxas de absorção de água e diminuição da retração na secagem e na queima e b) para a temperatura de 1050 ºC, os corpos de prova produzidos com 10% de chamote apresentaram melhores resultados para a tensão de ruptura a flexão.

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Ripoli Filho, Francisco. "A Utilização do Rejeito Industrial Cerâmico - Chamote - como Fator de Qualidade na Fabricação de Elementos Cerâmicos: um Estudo Experimental." Cerâmica 43, no. 281-282 (1997): 133–39. http://dx.doi.org/10.1590/s0366-69131997000300007.

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Este trabalho descreve pesquisa desenvolvida sobre a fabricação de elementos cerâmicos, através da utilização de chamote adicionado à argila. Chamote pode ser definido como um subproduto proveniente de rejeitos de material cerâmico. O experimento envolveu a utilização de sete tipos de amostras obtidas em olaria próxima à UFSM, as quais serviram para estudar as seguintes variáveis: teor de umidade de moldagem, proporção das misturas, argila-base e temperatura de queima. As principais características físicas e mecânicas observadas foram: retração linear de queima, absorção de água, porosidade, massa específica aparente e sucção inicial. A partir dessas observações chegou-se às seguintes conclusões: a) possibilidade de utilizar o chamote homogeneizado na fabricação de elementos cerâmicos, desde que em proporção ideal e queimado a temperatura adequada; b) as tensões de ruptura e absorção de água obtidas estão de acordo com aquelas previstas pelas normas brasileiras; c) a adição de chamote à argila contribui potencialmente para o controle da retração. Por fim, verifica-se que a adição de chamote à argila permite o aproveitamento desse tipo de resíduo na fabricação de produtos de boa qualidade e contribui para reduzir a poluição ambiental.

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Castro, R. J. S., R. A. L. Soares, and R. M. Nascimento. "Produção de revestimento cerâmico semi-poroso com adição de chamote de telhas." Matéria (Rio de Janeiro) 17, no. 4 (2012): 1166–75. http://dx.doi.org/10.1590/s1517-70762012000400007.

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A indústria de cerâmica vermelha é em parte responsável pela degradação ambiental provocadas pelo jazimento das matérias primas, a queima dos produtos e o descarte dos resíduos cerâmicos após queima. Este trabalho tem como objetivo verificar a potencialidade de se produzir revestimento cerâmico, incorporando chamote de telhas a uma massa básica típica para produção de revestimento semi-poroso. A massa básica e o chamote foram caracterizados por fluorescência de raios X, análise mineralógica por difração de raios X. Corpos de prova foram confeccionados por prensagem uniaxial partir da massa básica aditivada com 5%, 10%, 15% e 20% de chamote, em seguida queimados em escala industrial em forno de rolo, com temperatura de pico a 1135ºC em um ciclo de 25 min, para depois serem avaliados do ponto de vista tecnológico: absorção de água, retração linear de queima, tensão de ruptura a flexão, porosidade aparente, massa específica aparente, perda ao fogo e por último analisados microestruturalmente por microscopia eletrônica de varredura. Os resultados encontrados mostraram que a adição de chamote de telhas provoca redução da resistência mecânica e aumento de absorção de água. Mesmo assim, os resultados encontrados para a formulação dopada com até 20% de chamote encontram-se dentro dos valores estabelecidos pela norma vigente.

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Candido, V. S., R. M. Pinheiro, S. N. Monteiro, and C. M. F. Vieira. "Desenvolvimento de adoquim cerâmico com argilas cauliníticas, chamote e argilito." Cerâmica 59, no. 350 (2013): 310–16. http://dx.doi.org/10.1590/s0366-69132013000200017.

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Este trabalho tem por objetivo desenvolver uma massa cerâmica com argilas cauliníticas, chamote e argilito visando à obtenção de pavimento intertravado tipo adoquim. Inicialmente, as matérias-primas foram submetidas a ensaios de caracterização física, química e mineralógica. Corpos-de-prova cilíndricos foram preparados por prensagem uniaxial a 20 MPa e queimados em forno tipo mufla a 850 ºC. As propriedades tecnológicas avaliadas foram: absorção de água, retração diametral e resistência à compressão uniaxial. A análise microestrutural das composições foi feita por microscopia eletrônica de varredura. Os resultados indicaram que o argilito reduziu significativamente a absorção de água e a retração das composições. O chamote reduziu a retração diametral de queima e a resistência mecânica. Quanto à absorção de água o chamote não alterou significativamente esta propriedade. A melhor formulação desenvolvida é constituída por 50% em peso de argilas e 50% de argilito.

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Vieira, C. M. F., S. S. Teixeira, and S. N. Monteiro. "Efeito da temperatura de queima nas propriedades e microestrutura de cerâmica vermelha contendo chamote." Cerâmica 55, no. 335 (2009): 332–36. http://dx.doi.org/10.1590/s0366-69132009000300014.

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Este trabalho tem por objetivo avaliar o efeito da temperatura de queima nas propriedades de uma cerâmica constituída por argila caulinítica e incorporada com até 20% em peso de chamote. Foram preparados corpos de prova cilíndricos por prensagem uniaxial a 20 MPa para queima em forno de laboratório de 500 a 1100 ºC. As propriedades avaliadas foram densidade aparente, retração diametral, absorção de água e resistência mecânica. A microestrutura das cerâmicas foi avaliada por microscopia eletrônica de varredura e porosimetria de mercúrio. Os resultados indicaram que não houve variação significativa nas propriedades avaliadas entre 500 e 900 ºC. A partir daí, ocorreu uma redução brusca da porosidade que ocasionou um decréscimo da absorção de água e melhoria da resistência mecânica. A incorporação de 5% de chamote praticamente não alterou as propriedades da cerâmica. Entretanto, foi observado que a adição de maiores quantidades de chamote reduziu a resistência mecânica de queima da cerâmica.

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Morais, M. D. P. de, R. S. Macedo, and C. M. O. Raposo. "Preparação e caracterização de sistemas chamote/argila visando o reaproveitamento de descartes industriais." Cerâmica 61, no. 358 (2015): 206–12. http://dx.doi.org/10.1590/0366-69132015613581864.

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<p>A contribuição do setor ceramista relativa aos bens produzidos nacionalmente reflete a informalidade vigente nas olarias associada ao desconhecimento, em sua maioria, daqueles que manufaturam os produtos. Na região do nordeste, mais especificamente na Paraíba, a indústria de cerâmica vermelha também vivencia tal problemática associada à falta de um protocolo mais efetivo. Desse modo, este projeto foi desenvolvido visando contribuir para reduzir os impactos ambientais originados pela olaria Santa Cecília Ltda., PB, Brasil avaliando-se nova formulação com reaproveitamento do descarte, chamote. A caracterização dos materiais foi realizada por difração de raios X, por fluorescência de raios X por energia dispersiva, por microscopias, óptica e eletrônica de varredura. Os sistemas, chamote/amostras, queimados a 800, 900 e 1000 ºC foram também avaliados quanto às características cerâmicas.</p>

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Prado, Artidônio Dantas, Ricardo Neves Bedoya, and José Manuel Rivas Mercury. "INFLUÊNCIA DA INCORPORAÇÃO DE CHAMOTE NAS PROPRIEDADES FISICO-MECÂNICAS DE MATERIAIS CERÂMICOS ESTRUTURAIS." Engevista 18, no. 1 (2016): 158. http://dx.doi.org/10.22409/engevista.v18i1.712.

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Neste artigo é estudada a influência da incorporação de tijolos descartados em pó (chamote) em concentrações variáveis (0, 10,20, 30, 40 e 50% em peso) a uma massa industrial constituída por misturas (1:1) de duas argilas cauliniticas. As matérias primas (argilas e chamote) foram caracterizadas físicas, química e mineralogicamente, por Análise térmica (TG-DTA), Distribuição de tamanho de partículas (DTP) por difração de laser, Espectroscopia de fluorescência de raios X (FRX), Difração de Raios X (DRX) e Microscopia Eletrônica de Varredura (MEV). Corpos de prova contendo misturas de argila e chamote de dimensões 70 x 30 x5 mm3 foram prensados uniaxialmente a 25 MPa e secos a 110 ºC. Os corpos de prova obtidos foram tratados termicamente em forno convencional em atmosfera normal nas temperaturas de 850, 950, 1050 e 1150ºC, a uma taxa de aquecimento de 5 ºC/min e patamar de 2 horas. As propriedades físico-mecânicas avaliadas foram: absorção de água, porosidade aparente, retração linear e tensão de ruptura à flexão. Os resultados obtidos mostraram que os materiais tratados entre 850-950 ºC apresentam valores de TRF que não ultrapassam 5 MPa, o que limita o uso destas massas para fabricação de tijolos furados (5,5 MPa) e telhas (6,5 MPa). Acima dos 950°C ocorre um incremento da TRF (> 5,5 MPa) obtendo-se materiais com boa resistência mecânica, AA moderada, com boas propriedades dimensionais (retração linear baixa) podendo ser classificados como revestimentos do tipo BIII e BIIb (Porosos e semi-porosos) de acordo com as normas da ABNT 13818 (ABNT 13818, 1997).

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Quartha, Thays Smielevski, Agenor de Noni, Adilson Cechinel, and Vicente de Lorenzi. "Adição de Chamote à Massa de Porcelanato Técnico." Cerâmica Industrial 18, no. 4 (2013): 26–29. http://dx.doi.org/10.4322/cerind.2014.052.

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Zaccaron, Alexandre, Sergio Luciano Galatto, Vitor de Souza Nandi, and Paulo Fernandes. "Incorporação de Chamote na Massa de Cerâmica Vermelha como Valorização do Resíduo." Cerâmica Industrial 19, no. 3 (2014): 33–39. http://dx.doi.org/10.4322/cerind.2014.077.

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Bilousov, O. Ur, V. A. Sviderskyy, and O. V. Myronuk. "Influence of different types of chamot on a structure and properties of porous ceramics." Кераміка: наука і життя, no. 2(47) (July 12, 2020): 15–20. http://dx.doi.org/10.26909/csl.2.2020.2.

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The results of research of porous materials on the basis of products of ceramic production - chamot as a fractionating filler are given.. The features of formation of structure of material at the use of chamot with different chemical and mineralogical compositions in the conditions of speed baking are shown. Porous ceramics for filtration and aeration is obtained by a technology based on the regulation of porosity parameters by the use of chamotte of a certain granulometric composition and special binders. However, the granulometric composition of chamotte is a necessary but not sufficient factor to optimize the properties of porous filter ceramics. Along with the granulometry of chamotte, its chemical and mineralogical composition and surface energy must be taken into account. It depends in turn on the technological properties and the firing parameters of the original clay raw material. This paper presents the results of a study of porous materials based on ceramic products - chamotte as a fractionated filler. The chemical and mineralogical composition of chamotte made of poly-mineral clay at maximum firing temperature of 950°С and of refractory clay at firing at 1320°C was analyzed. The energy state of the surface of the chamotte particles was determined with the wetting by polar and non-polar liquids (water and benzene respectively). The differences in the specific effective surface area, lyophilicity and filtration coefficients was determined. The peculiarities of the formation of the pore structure of ceramics obtained using the specified samples of chamotte in the conditions of high-speed firing in the roller oven are shown. Significant differences in the formation of open and closed pores were observed, the predominant specific proportion of open pores in the material using polymineral clay. The possibility of properties regulation of the pore structure and the energy state of the surface of the filter material when applying a mixture of chamotte varieties was experimentally confirmed.

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Oliveira, Y. L., Z. Linhares, L. Ancelmo, and R. A. L. Soares. "Estudo da Reutilização de Resíduos de Telha Cerâmica (Chamote) em Formulação de Massa para Blocos Cerâmicos." Cerâmica Industrial 21, no. 2 (2016): 45–50. http://dx.doi.org/10.4322/cerind.2016.013.

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Dias, Lilian Lima, Ana Paula Margarido Menegazzo, Eduardo Quinteiro, and Marcos Antônio Serafim. "Desenvolvimento de um novo produto cerâmico para pavimentação de passeios e áreas públicas." Ambiente Construído 16, no. 4 (2016): 155–65. http://dx.doi.org/10.1590/s1678-86212016000400111.

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Resumo Mobilidade e segurança são temas cada vez mais discutidos nos grandes centros urbanos, e as iniciativas nesse universo devem prever soluções práticas e econômicas, que gerem benefícios para os cidadãos. O pavimento, um dos fatores para a qualidade urbana, é a via de acesso indispensável para garantir o direito de ir e vir. Entre as soluções, o pavimento intertravado se destaca como um dos produtos mais recomendados na pavimentação das calçadas e áreas públicas. Em países da Europa e da América Latina a pavimentação com sistemas intertravados de cerâmicas é amplamente utilizada, porém essa prática ainda é pouco observada no Brasil, pela inexistência desse produto no mercado local. Desse modo, o objetivo deste projeto foi o desenvolvimento de pavimentos intertravados de cerâmica visando ao uso em passeios e áreas públicas. Também foram adicionados ao novo produto desenvolvido resíduos queimados oriundos do próprio processo de fabricação, os quais são chamados de cacos ou chamote, para diminuir a quantidade de material a ser descartado no meio ambiente. Após os resultados positivos na caracterização dos produtos, foram criados novos designs para essa tipologia de produtos, os quais foram produzidos em escala laboratorial.

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Chamoun, Fady. "Pathophysiologic role of selectins and their ligands in ischemia reperfusion injury." Frontiers in Bioscience 5, no. 1 (2000): e103. http://dx.doi.org/10.2741/chamoun.

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González Cortina, M., and L. De Villanueva Domínguez. "Morteros hidráulicos de cal y chamota." Materiales de Construcción 52, no. 266 (2002): 65–76. http://dx.doi.org/10.3989/mc.2002.v52.i266.335.

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Tuan, Pham, Jeongyeo Lee, Chang Park, et al. "Carotenoid Biosynthesis in Oriental Melon (Cucumis melo L. var. makuwa)." Foods 8, no. 2 (2019): 77. http://dx.doi.org/10.3390/foods8020077.

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Full-length cDNAs encoding ξ-carotene desaturase (CmZDS), lycopene ε-cyclase (CmLCYE), β-ring carotene hydroxylase (CmCHXB), and zeaxanthin epoxidase (CmZEP), and partial-length cDNA encoding ε-ring carotene hydroxylase (CmCHXE) were isolated in Chamoe (Cucumis melo L. var. makuwa), an important commercial fruit. Sequence analyses revealed that these proteins share high identity and common features with other orthologous genes. Expression levels of entire genes involved in the carotenoid biosynthetic pathway were investigated in the peel, pulp, and stalk of chamoe cultivars Ohbokggul and Gotgam. Most of the carotenoid biosynthetic genes were expressed at their highest levels in the stalk, whereas carotenoids were highly distributed in the peel. The expression levels of all carotenoid biosynthetic genes in fruits of the native cultivar Gotgam chamoe were higher than those in the cultivar Ohbokggul chamoe, consistent with the abundant carotenoid accumulation in Gotgam chamoe fruits and trace carotenoid content of Ohbokggul chamoe fruit. Lutein and β-carotene were the dominant carotenoids; high levels (278.05 μg g−1 and 112.02 μg g−1 dry weight, respectively) were found in the peel of Gotgam chamoe. Our findings may provide a foundation for elucidating the carotenoid biosynthetic mechanism in C. melo and inform strategies for developing new chamoe cultivars with improved characteristics.

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Pavlova, Irina, Anna Getman, and Elena Farafontova. "The Way of Utilization of Fused Corundum Dust Waste for the High-Alumina Chamotte Production." Solid State Phenomena 316 (April 2021): 100–104. http://dx.doi.org/10.4028/www.scientific.net/ssp.316.100.

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High-alumina chamotte with an Al2O3 content of more than 62% is a desirable raw material to produce high-alumina refractories. The production of high-alumina aggregate (chamotte) is carried out in various ways, using plastic or semi-dry technology for briquetting from commercial alumina and refractory clay. When grinding fused corundum, the dust containing 93–95% Al2O3 is formed; it is currently a substandard material. It is of interest to involve this waste product in the production of high-alumina chamotte. The developed technology allows obtaining the desirable material and utilizing production waste. In this project the briquetting parameters to produce high-alumina chamotte using corundum waste and refractory enriched kaolin were determined.

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Xiang, Ruo Fei, Yuan Bing Li, Shu Jing Li, Xin Yan Ma, Ya Wei Li, and Shao Bai Sang. "Effect of Zircon Content on the Microstructure and Physical Properties of Chamotte Refractories." Key Engineering Materials 697 (July 2016): 604–7. http://dx.doi.org/10.4028/www.scientific.net/kem.697.604.

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In this work, chamotte with dispersions of up to 30wt% zircon is sintered at 1500 °C to investigate the effect of zircon content on the microstructure and physical properties of chamotte refractories. The microstructure and physical properties of samples are investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) coupled with energy dispersive X-ray spectroscopy (EDS), three-point bending and dilatometer. The result shows that the main phases of chamotte with and without sintering at 1500 °C are mullite and cristobalite, the addition of zircon has no impact on the main phase compositions of chamotte matrix. For the sintered samples, zircon grains are wrapped with glass and no obvious bonding are detected between the interface of zircon and mullite grains. Increasing zircon content leads to the increase in bulk density and has a negative effect on the flexural strength, besides, linear thermal expansion ratio decreases as the zircon content increases.

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Aloy, A. S., and A. V. Strelnikov. "Study of New Filters Properties for Cs-137 Vapour Capture at High Temperature." Advances in Science and Technology 73 (October 2010): 171–75. http://dx.doi.org/10.4028/www.scientific.net/ast.73.171.

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Major characteristics of two alumosilicate filters based on fly ash microspheres and porous chamotte were studied for high-temperature trapping of Cs-137 vapours. To determine aerodynamic resistance of the filters, a test facility was designed and built to determine the aerodynamic resistance of the filters. It was shown that porous chamotte had significantly lower resistance than that of the filter based on fly ash microspheres at linear airflows up to 15 cm/sec. Thermal treatment at 1400-15000С made it possible to increase mechanical strength of the filter based on porous chamotte factors of 1,5- 3,4, without any significant changes of other characteristics that exceeded similar parameters for the filter based on fly ash microspheres.

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Stepanova, Nadejda Fedorovna. "CULTURAL TRADITIONS IN SELECTION OF FEEDSTOCK AND MINERAL ADMIXTURESIN CERAMICS PRODUCTION (ON THE GROUND OF MATERIALS FROM THE MOUNTAINOUS, FOOTHILL, STEPPE AND FOREST-STEPPE AREAS OF ALTAI)." Samara Journal of Science 4, no. 4 (2015): 90–95. http://dx.doi.org/10.17816/snv20154210.

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The article is devoted to generalization of results of the technical and technological analysis of the ceramics from settlement and funeral complexes of altai dated from the neolithic era to the Middle ages. cultural traditions in selection of feedstock and preparation of moulding masses, depending on landscape characteristics of territories where monuments are found, are analyzed in the article. it is established that for steppe, forest-steppe and foothill areas the use of ferruginous (iron-rich) flexible clays is characteristic, and as for mountain areas, the use of low ferruginous and medium ferruginous claylike material is typical. differences of cultural traditions and differences in use of mineral admixtures, coinciding with landscape characteristics of areas where monuments are located, are revealed. the addition of chamotte is typical for forest-steppe and steppe altai (69% and 65%), and the addition of gruss - for foothill altai (69%). in Mountain altai production of ceramics without artificially entered mineral admixtures was the main tradition: chamotte and gruss are recorded in 13% and 17% of vessels, respectively, that in total makes 30%. the mixed recipes (gruss + chamotte) prevail in peripheral regions of the foothill zone. such observations allowed drawing a conclusion that in areas with stone outcrop gruss had been added to moulding masses, and chamotte had been added in places with no stone outcrop. the mixed recipes (gruss+ chamotte) reflect not only the merging of cultural traditions, but also the mixing of population from the areas with different landscape characteristics.

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BRAGOV, ANATOLY, ALEXANDER KONSTANTINOV, ANDREY LOMUNOV, ANATOLY SADYRIN, IVAN SERGEICHEV, and LEOPOLD KRUSZKA. "DYNAMIC COMPRESSIBILITY OF HIGH-POROSITY DAMPERS OF THERMAL AND SHOCK LOADINGS: MODELING AND EXPERIMENT." International Journal of Modern Physics B 22, no. 09n11 (2008): 1183–88. http://dx.doi.org/10.1142/s0217979208046517.

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High-porosity materials, such as chamotte and mullite, possess a heat of fusion. Owing to their properties, these materials can be used with success as damping materials in containers for airplane, automobile, etc. transportation of radioactive or highly toxic materials. Experimental studies of the dynamic properties have been executed with using some original modifications of the Kolsky method. These modified experiments have allowed studying the dynamic compressibility of high-porosity chamotte at deformations up to 80% and amplitudes up to 50 MPa. The equations of the mathematical model describing shock compacting of chamotte as a highly porous, fragile, collapsing material are presented. Deformation of high-porous materials at non-stationary loadings is usually accompanied by fragile destruction of interpore partitions as observed in other porous ceramic materials. Comparison of numerical and experimental results has shown their good conformity.

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Baranchiyeva, Zarina, Gulziya Seilkhanova, and Akmaral Rakhym. "Analysis of the physicochemical and sorption characteristics of composites based on zeolite and chamotte clay." MATEC Web of Conferences 340 (2021): 01027. http://dx.doi.org/10.1051/matecconf/202134001027.

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Clays and aluminosilicate materials are known as effective sorbents for purification of wastewater from various types of contaminants. Some properties and sorption activity of materials based on the zeolite of Shankanai deposit and Chamotte clay towards Cd2+ ions were analyzed in the present work. The structural characteristics of the studied objects, their qualitative and quantitative composition were determined by the SEM and EDAX methods. It was found that maximum adsorption capacity (qe) of the initial zeolite for extraction Cd2+ ions is (7.3±0.11) mg/g, while for Chamotte clay this value equals to (5.3±0.12) mg/g. After modification with polyvinylpyrrolidone, qe increased to (10.1±0.08) mg/g for zeolite, and (8.5±0.15) mg/g for Chamotte clay. Developed specific surface of the composite material (sorbent) and complexation with the active centres of thepolymer couldbe a resultof Cd2+ ions binding.

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Isagulov, A. Z., V. Yu Kulikov, S. S. Kvon, A. M. Dostaeva, and E. P. Shcherbakova. "The influence of the structure of refractory products on their performance properties." NOVYE OGNEUPORY (NEW REFRACTORIES), no. 11 (December 29, 2018): 46–49. http://dx.doi.org/10.17073/1683-4518-2018-11-46-49.

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The inﬂuence of the structure of refractory products on such operational properties as slag resistance and heat resistance is considered. As samples, a conventional chamotte refractory (standard) and chamotte refractory made according to a new technology using non-stationary pressing pressure were used. It is shown that the porosity, slag resistance and heat resistance of products manufactured using unsteady pressure is higher than that of the standard.Ill.4. Ref. 4. Tab. 2.

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Mata, Carolina Couto da. ""Chance para uma esquizofrênica": primeiros fundamentos da Terapia Ocupacional do Prof. Rui Chamone Jorge/“Chance for a esquizophrenic”: first foudantions of Ocupational Therapy by Prof. Rui Chamone Jorge." Revista Interinstitucional Brasileira de Terapia Ocupacional - REVISBRATO 3, no. 3 (2019): 307–15. http://dx.doi.org/10.47222/2526-3544.rbto26763.

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A imagem da capa é um autorretrato de MS (36 anos), que se tornou capa do livro ‘Chance para uma Esquizofrênica’, publicado em 1981 pelo terapeuta ocupacional mineiro Prof. Rui Chamone Jorge. Pintada em 20/01/1977, usando guache e cartolina branca (30x30cm), foi feita nove meses depois do início dos atendimentos de MS com o Prof. Chamone no SER.TO – Serviço de Terapia Ocupacional (MG). ‘Chance para uma Esquizofrênica’ foi o livro que inaugurou a série de publicações sobre o trabalho de fundamentação da Terapia Ocupacional desenvolvida pelo professor, ao longo de sua vida. Esse quadro e mais onze das obras de MS compõe uma das coleções que são parte do acervo do Museu Didático de Imagens Livres, um museu itinerante criado em 11 de setembro de 1992 pelo professor, e podem ser encontradas no site do GES.TO – Grupo de Estudo Profundos de Terapia Ocupacional.AbstractThe cover image is a self-portrait of a patient of 36 year old. It became part of the book 'Chance for a Schizophrenic', published in 1981 by Professor Rui Chamone Jorge, one of the first occupational therapists in Brazil. It was painted in January 20th, 1977, using gouache and white cardboard (30x30cm), nine months after the beginning of her sessions with Prof. Chamone, in a clinic called SER.TO – Occupational Therapy Service, in Minas Gerais. This is the first book of a series of publications on Prof Chamone OT theory, developed throughout his career. Along with other eleven objects, the collection is part of itinerary Didatic Museum of Free Images, created on September 11, 1992, by the professor, which can be found on GES.TO’s – Group of Advanced Studies in Occupational Therapy - website.Key words: Occupational Therapy, Occupational Therapy/History, Mental Health.ResumenLa imagen de la portada es un autorretrato de la EM (36), quien se convirtió en la portada del libro "Chance for a Schizophrenic", publicado en 1981 por el terapeuta ocupacional de Minas Gerais, Brasil. Rui Chamone Jorge. Pintado el 20 de enero de 1978, usando gouache y cartulina blanca (30x30cm), se realizó nueve meses después del comienzo de las consultas de MS con el Prof. Chamone en SER.TO - Servicio de Terapia Ocupacional (MG). 'Chance for a Schizophrenic' fue el libro que abrió la serie de publicaciones sobre el trabajo fundamental de la Terapia Ocupacional desarrollada por el maestro, a lo largo de su vida. Esta pintura y once de las obras de MS conforman una de las colecciones que forman parte de la colección del Free Images Teaching Museum, un museo itinerante creado el 11 de septiembre de 1992 por el profesor, y se puede encontrar en el sitio web GES.TO - Grupo. Estudios de terapia ocupacional.Palabras clave: Terapia ocupacional; Terapia ocupacional / historia; Salud mental.

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Konevskikh, L. A., O. G. Omel’chenko, O. G. Drugova, A. N. Varaksin, and T. Yu Obukhova. "Pulmonary ventilation and gases exchange disorders in workers engaged into refractory materials production." Occupational Health and Industrial Ecology, no. 2 (March 14, 2019): 74–79. http://dx.doi.org/10.31089/1026-9428-2019-2-74-79.

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Introduction.Occupational exposure to dust in concentrations sometimes exceeding allowable norms, infl uence of associated hazards (irritating gases, toxic chemicals, unfavorable microclimate at workplace, heavy physical work) cause occupational and occupationally conditioned bronchopulmonary diseases and lower work capacity in workers with main occupations of refractory materials production.Objective.To study functional state of respiratory system for diagnosis of early disorders of pulmonary ventilation and gases exchange in workers of moulded refractory materials production.Materials and methods.Prospective randomized study included apparently healthy male workers (n = 61) of refractory materials plant producing chamott e-silica and spinel-periclase-carbon refractories. Clinic of Ekaterinburg medical research center in 2017–2018 provided examination of carriers (n=21) in spinel-periclase-carbon refractories production shop and pressmen (n=40) of moulding area in chamott e-silica refractories production, aged 27 to 60 years, with length of service in hazardous conditions from 4 to 37 years. Bodyplethysmography helped to assess general lung capacity (GLC), residual lung volume, ratio of residual lung volume to general lung capacity, functional residual lung capacity, bronchial resistance and diff usion lung ability by carbon oxide via single inspiration method. For nonventilated lung volume, the authors used ∆ GLC value that is a diff erence between GLC values measured via bodyplethysmography and via helium dilution in single inspiration maneuver.Results.Obstructive syndrome (6.5%) was a main type of ventilation disorders among the examinees, and equally frequent among the workers engaged into spinel-periclase-carbon refractories production (9.5%) and in those engaged into chamott esilica refractories production (5%). Th e workers engaged into spinel-periclase-carbon refractories production had obstructive syndrome associated with lung hyperinfl ation, and those engaged into chamott e-silica refractories production had also a tendency to restrictive disorders. Lung gases exchange disorders were seen in one third of the examinees, equally frequent in both workers engaged into spinel-periclase-carbon refractories production and those engaged into chamott e-silica refractories production, manifested in 2 variants: lower diff usion lung capacity (fi rst variant) and lower diff usion lung capacity with increased ∆ GLC (second variant).Conclusion.Th e study results prove necessity of bodyplethysmography and diff usion lung capacity diagnosis to reveal perfusion and ventilation disorders at early stages in workers engaged into spinel-periclase-carbon refr actories production over 8 years and in those engaged into chamott e-silica refr actories production over 12 years.

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Cabezón, Oscar, Roser Velarde, Gregorio Mentaberre, et al. "Experimental infection with chamois border disease virus causes long-lasting viraemia and disease in Pyrenean chamois (Rupicapra pyrenaica)." Journal of General Virology 92, no. 11 (2011): 2494–501. http://dx.doi.org/10.1099/vir.0.034595-0.

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Since 2001, severe outbreaks of disease associated with border disease virus (BDV) infection have been reported in Pyrenean chamois. The disease is characterized by variable degrees of cachexia, alopecia and neurological manifestations prior to death. The aim of this study was to investigate this disease under experimental conditions. To assess viral virulence, humoral immune response, dissemination and probable routes of transmission, seven chamois (five seronegative and two seropositive for BDV) were inoculated with a BDV isolated from a naturally infected chamois. A group of three chamois were maintained as uninfected controls. The five seronegative chamois became viraemic from day 2 post-inoculation (p.i.) until their death (three animals) or the end of the experiment (on day 34 p.i.) and developed neutralizing antibodies from day 18 p.i. until the end of the study. Continuous shedding of the virus was detected by RT-PCR in oral, nasal and rectal swabs in viraemic chamois from day 5 p.i. Despite none of the viraemic chamois showing obvious neurological signs, all of them had a non-suppurative meningoencephalitis as seen in naturally infected chamois. The two inoculated BDV-seropositive chamois did not become viraemic. This study confirms that BDV is the primary agent of the disease that has been affecting chamois populations in recent years in the Pyrenees and that previously acquired humoral immunity is protective.

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Shulyak, R. S., V. V. Primachenko, E. A. Gin'yarp, V. B. Kulakov, V. A. Khreshchenyuk, and V. I. Koroteeva. "Refractories from Murzinsk chamotte." Refractories 27, no. 7-8 (1986): 475–77. http://dx.doi.org/10.1007/bf01389522.

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Luby, Nicolas, and Solene Fraces. "Chambre propre ou chambre libre ?" Archives des Maladies Professionnelles et de l'Environnement 81, no. 5 (2020): 591. http://dx.doi.org/10.1016/j.admp.2020.03.437.

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Holt, Jodie S., Steven R. Radosevich, and Walter L. Graves. "Long-Term Effects on Vegetation of Herbicide Treatments in Chaparral." Weed Science 33, no. 3 (1985): 353–57. http://dx.doi.org/10.1017/s0043174500082412.

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Field studies were established in 1974 and 1975 at various locations in San Diego County, CA, to evaluate several herbicides for the control of chamise (Adenostoma fasciculatumH.&A.) and redshank chamise (Adenostoma sparsifoliumTorr.). Herbicide effects on vegetation were reevaluated in 1982. Plots originally treated with 2.2 or 4.5 kg ae/ha of glyphosate [N-(phosphonomethyl)glycine] had virtually no chamise regrowth 8 yr after treatment. The herbicides 2,4-D [(2,4-dichlorophenoxy)acetic acid], combinations of 2,4-D with 2,4,5-T [(2,4,5-trichlorophenoxy)acetic acid] or dichlorprop [2-(2,4-dichlorophenoxy) propionic acid], fosamine [ethyl hydrogen (aminocarbonyl)phosphonate], triclopyr {[(3,5,6-trichloro-2-pyridinyl)oxy] acetic acid}, tebuthiuron {N-[5-(1,1-dimethylethyl)-1,3,4-thiadiazol-2-yl]-N,N′-dimethylurea}, and picloram (4-amino-3,5,6-trichloropicolinic acid) had no long-term effects on chamise. Soil collected in 1982 from glyphosate-treated plots contained similar numbers of chamise seeds but fewer seeds of other species compared to untreated plots. Canopy cover of redshank chamise was similar in treated and untreated plots after 8 yr. These results document the effectiveness of glyphosate in killing the underground root-crown of chamise, which prevented sprouting, but not redshank chamise.

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Berdnikova, Liliya, Fedor Gorbunov, and Andrey Lapin. "Effective building materials using technogenic waste and mineral raw materials." MATEC Web of Conferences 340 (2021): 01003. http://dx.doi.org/10.1051/matecconf/202134001003.

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The results of research on the development of compositions of construction materials for structural purposes based on technogenic waste and mineral raw materials are presented. The possibility of obtaining materials with a wide range of operational properties by the methods of slip casting (compressive strength of the samples based on chamotte and sand is 53.0–95.9 and 50.0-69.5 MPa, bending strength is 8.1–16.5 and 8.5–15.3 MPa, abrasion is 0.2–0.36 and 0.15–0.39 g/cm2, respectively) and semi-dry pressing (compressive strength of the samples based on chamotte and sand are 19.1–43.5 and 18.3–32.6 MParespectively) isdemonstrated.

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Fourcade-Jourdain, Anne. "Chambre." L'en-je lacanien 26, no. 1 (2016): 219. http://dx.doi.org/10.3917/enje.026.0219.

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Perrin, Michel. "Quelques relations entre rêve et chamanisme." Anthropologie et Sociétés 18, no. 2 (2003): 29–42. http://dx.doi.org/10.7202/015311ar.

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Résumé Résumé/ Abstract Quelques relations entre rêve et chamanisme Comment le rêve contribue-t-il à différencier la personne ordinaire de celle du chamane ? Pourquoi diverses actions du chamane révèlent-elles certaines propriétés attribuées au rêve ? Comment se justifie le rôle clé du rêve dans l'élection du chamane ? Quels usages le chamane fait-il de ses propres rêves et de ceux de ses patients ? Des réponses sont ici proposées à ces quatre questions concernant les relations entre rêve et chamanisme.

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Punzalan, Bernard T. "Chamorro Roots Genealogy Project: Technological Milestones." Genealogy 3, no. 3 (2019): 38. http://dx.doi.org/10.3390/genealogy3030038.

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With the advent of technology, the Chamorro Roots Genealogy Project has evolved from a personal family project into a CHamoru peoples’ project with a database containing over 344,000 names and globally accessible over the internet. The technological presence is not only for CHamoru-specific genealogists. Its accessibility is also important for an ever-growing CHamoru diaspora population of over 147,798 in the United States, where the majority of the CHamoru population now resides. In this paper, I will discuss some of the Project’s history, technological tools to network, communicate, and collaborate on the Project’s data. This includes the publication of the transcribed 1920 and 1930 Census of Guam with observational comments. The essay concludes with a brief observation of methods, use and results of social media as a key collaborating mechanism that is the genesis for further developing a comprehensive index of CHamoru family clan names and a first name-nickname dictionary. The global accessibility of these resources produced from this Project will continue to add to the availability of CHamoru genealogy resources locally and abroad. More importantly, perhaps it will provide a key data-mining resource for scholars to review and interpret data that will enable another aspect to the knowledge-base of CHamoru history from a genealogical lens.

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Shulyak, R. S., V. V. Primachenko, and M. M. Dyshlyuk. "Chamotte from Murzinsk deposit kaolin." Refractories 27, no. 7-8 (1986): 398–99. http://dx.doi.org/10.1007/bf01389505.

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Sandutsa, T. M., and L. A. Dergaputskaya. "Production of lightweight chamotte refractories." Refractories 33, no. 7-8 (1992): 381–83. http://dx.doi.org/10.1007/bf01283302.

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Sokov, V. N., and T. A. Metanidze. "Lightweight heat-resistant chamotte refractories." Refractories 33, no. 9-10 (1992): 431–33. http://dx.doi.org/10.1007/bf01283391.

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Moëlo, Yves, Emmanuel Fritsch, Eric Gloaguen, and Olivier Rouer. "Polygenic chamosite from a hydrothermalized oolitic ironstone (Saint-Aubin-des-Châteaux, Armorican Massif, France): crystal chemistry, visible–near-infrared spectroscopy (red variety) and geochemical significance." Clay Minerals 55, no. 1 (2020): 83–95. http://dx.doi.org/10.1180/clm.2020.13.

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AbstractSeveral generations of chamosite, including a red variety, occur in the Ordovician hydrothermalized oolitic ironstone from Saint-Aubin-des-Châteaux (Armorican Massif, France). Their chemical re-examination indicates a low Mg content (0.925 < Fe/(Fe + Mg) < 0.954), but a significant variation in IVAl. Minor vanadium is present at up to 1.1 wt.% oxide. Variations in IVAl, the vanadium content and the colour of chamosite are related to the hydrothermal reworking of the ironstone. Taking into account other published data, the ideal composition of chamosite is (Fe5–xAl1+x)(Si3–xAl1+x)O10(OH)8, with 0.2 < x < 0.8 (0.2: equilibrium with quartz; 0.8: SiO2 deficit). The red chamosite (IIb polytype) has a mean composition of (Fe3.87Mg0.23Mn0.01□0.07Al1.74V0.07)(Si2.33Al1.67)O10(OH)8. This chamosite is strongly pleochroic, from pale yellow (E || (001)) to deep orange red (E ⊥ (001)). Visible–near-infrared absorbance spectra show a specific absorption band centred at ~550 nm for E ⊥ (001), due to a proposed new variety of Fe/V intervalence charge-transfer mechanism in the octahedral sheet, possibly Fe2+ – V4+ → Fe3+ – V3+. While the formation of green chamosite varieties is controlled by reducing conditions due to the presence of organic matter as a buffer, that of red chamosite would indicate locally a weak increase of fO2 related to oxidizing hydrothermal solutions.

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Kittl, P., G. Díaz, and H. Alarcón. "Dosificación de un mortero refractario cemento-talco-chamota sometido a choque térmico." Materiales de Construcción 42, no. 225 (1992): 5–12. http://dx.doi.org/10.3989/mc.1992.v42.i225.716.

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Tian, Yue Chao, Xi Liu, Hui Tang, et al. "Improvement of Thermal Shock Resistance Performance of High Alumina Ceramic Filter Support." Advanced Materials Research 750-752 (August 2013): 525–28. http://dx.doi.org/10.4028/www.scientific.net/amr.750-752.525.

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Mullite-corundum multiphase ceramic materials were prepared at 1400°C for 2h with bauxite chamotte and clay clinker as raw material (size<74 μm), molded at pressure of 50 MPa. Effect of raw materials composition on sintering and themal shock resistance of composite were researched by measurements of apparent porosity, bending strength，thermal shock resistance and thermal expansion rates, and analysed by XRD and SEM. The results showed that the best weigh percentage of raw materials with better sintering and themal shock resistance are bauxite chamotte 50 wt%, clay clinker 50wt% for mullite-corundum multiphase ceramic materials. The test results for high temperature gas cleaning dust removal technology development and the application of the composite ceramic material has important application value.

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Selin, Dmitrii V., and Yuriy P. Chemyakin. "Features of Ceramics of the Kulai Culture (Surgut Variant) of the Barsov gorodok I/32 Site (Surgut-Ob Region)." Archaeology and Ethnography 20, no. 5 (2021): 116–28. http://dx.doi.org/10.25205/1818-7919-2021-20-5-116-128.

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Purpose. Barsova Gora is a unique archaeological and landscape site located in the Tyumen Region of the Russian Federation. The archaeological site Barsov gorodok I/32 is located on the edge of the bank of Utoplaya river. A visual comparison of the ceramics of the early Iron Age from the Barsov gorodok I/31–32 sites and the ceramics of the Barsov gorodok I/4 site from the east showed their great similarity, if not their identical nature. For a correct comparison and identification of similarities and differences in the ceramics of these sites, it is necessary to conduct a comprehensive study of the products of each settlement using a unified technique. The study is devoted to the analysis of ceramics of the Barsov gorodok I/32 site. Results. The most common motifs are rows of ‘ducks’. Other common patterns are: short wavy horizontal and vertical prints (‘birds’ and ‘snakes’), rows of stamp prints, notches and ‘pearls’. There are no non-ornamented dividing zones on the vessels. There are no ornaments in the form of a series of hemotheric figures and meanders. The upper edges of the vessels are flat (28 %) or beveled inward (72%). In 33% of cases, a cornice is present. The ceramics are made from low-sand ferruginous clays with a natural admixture of sand, mica, brown iron ore, and scraps of vegetation. Artificial impurities are represented by chamotte, broken stone and organic matter. Four recipes of clay paste have been revealed: clay + broken stone; clay + broken stone + chamotte; clay + chamotte; clay + chamotte + organic matter. The ceramics are made with ribbons. The shape of the vessels is cauldron-like. Conclusion. The absence of non-ornamented dividing zones, the presence of rows of short wavy horizontal and vertical impressions (‘birds’ and ‘snakes’), the presence of inwardly beveled upper edges of the vessels with ornamented cornices testify to the late existence of this pottery. The ceramics of the Barsov gorodok I/32 site can be attributed to the late stage of the Kulai culture (Surgut variant).

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Goberis, S., and I. Pundene. "Hydration of Gorkal-70 Cement in Cement-Chamotte Pastes Containing Chamotte of Different Granular Compositions." Refractories and Industrial Ceramics 46, no. 2 (2005): 138–42. http://dx.doi.org/10.1007/s11148-005-0069-3.

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Morin, Michel. "L'élection des membres de la Chambre haute du Canada-Uni, 1856-1867." Les Cahiers de droit 35, no. 1 (2005): 23–50. http://dx.doi.org/10.7202/043269ar.

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Le présent texte analyse la décision prise en 1856 d'élire les membres de la Chambre haute du Canada-Uni. Dans la première partie, l'auteur explique que la notion d'une chambre haute élue a été mise en avant pour des motifs contradictoires par divers mouvements politiques du Haut-Canada et du Bas-Canada ainsi que par les autorités britanniques. La réforme de 1856 a instauré une chambre haute partiellement élue, élitiste et conservatrice. Dans la deuxième partie, l'auteur estime que cette expérience a été peu concluante, compte tenu du nombre élevé de conseillers élus par acclamation et du fonctionnement harmonieux du Parlement, tempéré par la possibilité toujours présente d'un blocage. Cette situation, combinée à l’opposition ferme de la Nouvelle-Ecosse et du Nouveau-Brunswick au principe d'une chambre haute élue, explique la réapparition du système nominatif en 1867. Dans la troisième partie, l'expérience de la Chambre haute élue à l’Île-du-Prince-Édouard est mise en parallèle avec celle du Canada-Uni. L'auteur conclut en soulignant quelques différences et points en commun avec le récent débat sur la réforme du Sénat.

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Theye, Thomas, Teddy Parra, and Christian Lathe. "Room temperature compressibility of clinochlore and chamosite." European Journal of Mineralogy 15, no. 3 (2003): 465–68. http://dx.doi.org/10.1127/0935-1221/2003/0015-0465.

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Doumergue, Didier. "Autre chambre." Vacarme 14, no. 1 (2000): 100. http://dx.doi.org/10.3917/vaca.014.0100.

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Terrones-Saeta, Juan María, Jorge Suárez-Macías, Francisco Javier Iglesias-Godino, and Francisco Antonio Corpas-Iglesias. "Development of Geopolymers as Substitutes for Traditional Ceramics for Bricks with Chamotte and Biomass Bottom Ash." Materials 14, no. 1 (2021): 199. http://dx.doi.org/10.3390/ma14010199.

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The greater environmental awareness, new environmental regulations and the optimization of resources make possible the development of sustainable materials as substitutes for the traditional materials used in construction. In this work, geopolymers were developed as substitutes to traditional ceramics for brick manufacture, using as raw materials: chamotte, as a source of aluminosilicate, and biomass bottom ashes from the combustion of almond shell and alpeorujo (by-product produced in the extraction of olive oil composed of solid parts of the olive and vegetable fats), as the alkaline activator. For the feasibility study, samples were made of all possible combinations of both residues from 100% chamotte to 100% biomass bottom ash. The tests carried out on these sample families were the usual physical tests for ceramic materials, notably the compression strength test, as well as colorimetric tests. The freezing test was also carried out to study the in-service behavior of the different sample groups. The families with acceptable results were subjected to Fourier transform infrared (FTIR) analysis. The results of the previous tests showed that the geopolymer was indeed created for the final families and that acceptable mechanical and aging properties were obtained according to European standards. Therefore, the possibility of creating geopolymers with chamotte and biomass bottom ashes as substitutes for conventional ceramics was confirmed, developing an economical, sustainable material, without major changes in equipment and of similar quality to those traditionally used for bricks.

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Cochener, B. "Implants phakes de chambre antérieure versus chambre postérieure." Journal Français d'Ophtalmologie 30, no. 5 (2007): 539–51. http://dx.doi.org/10.1016/s0181-5512(07)89640-9.

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Ascenzi, P., M. E. Clementi, S. G. Condò, et al. "Functional, spectroscopic and structural properties of haemoglobin from chamois (Rupicapra rupicapra) and steinbock (Capra hircus ibex)." Biochemical Journal 296, no. 2 (1993): 361–65. http://dx.doi.org/10.1042/bj2960361.

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The functional and spectroscopic properties of chamois (Rupicapra rupicapra) and steinbock (Capra hircus ibex) haemoglobin (Hb) have been studied with special reference to the action of allosteric effectors and temperature. Moreover, the amino acid sequences of the N-terminal segments of the alpha- and beta-chains have been determined. The present results indicate that chamois and steinbock Hbs display a low affinity for O2, which appears to be modulated in vivo by Cl- ions rather than 2,3-bisphosphoglycerate. The Bohr effect for O2 binding to chamois and steinbock Hb is higher than for reindeer and bovine Hbs, being similar to that of human Hb. Moreover, the temperature-dependence of oxygenation appears intermediate between that of human and reindeer Hbs. E.p.r. and absorption spectroscopic properties of the ferrous nitrosylated derivative of chamois and steinbock Hbs suggest that both haemoproteins are in a low-affinity conformation even in the absence of InsP6. The reduced effect of polyphosphates on the functional and spectroscopic properties of chamois and steinbock Hb agree with amino acid differences in the N-terminal segment of the beta-chains (i.e. the deletion of Val(NA1) and the replacement of His(NA2), present in human Hb, and Gln(NA2), present in horse Hb, by Met). The molecular mechanism modulating the basic reaction of O2 with chamois and steinbock Hb may be linked to specific physiological needs related to the high-altitude habitats of these two animals.

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Laforce, Esther. "Les chambres fermées dans Malina." L’Annuaire théâtral, no. 61 (August 28, 2018): 93–115. http://dx.doi.org/10.7202/1051028ar.

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Structurée autour de la figure de trois chambres – chambre à coucher, chambre du monstrueux et « chambre à soi » –, cette analyse de l’adaptation du roman Malina d’Ingeborg Bachmann réalisée par Brigitte Haentjens se déploie autour de deux enjeux importants : d’une part, celui du traumatisme lié aux horreurs perpétrées durant la Deuxième Guerre mondiale et, d’autre part, l’enjeu féministe, qui découle chez Bachmann du premier. Convoquant les écrits de Virginia Woolf et d’Elfriede Jelinek, l’étude propose différentes significations du lieu fermé rendu à la scène par Haentjens, dans lequel étouffe le personnage féminin central.

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Rumi, M. Kh, Sh K. Irmatova, Sh A. Faiziev, et al. "Lightweight Materials based on Fused Chamotte." Glass and Ceramics 77, no. 9-10 (2021): 344–47. http://dx.doi.org/10.1007/s10717-021-00304-0.

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