Resultados globales: 38 registros encontrados en 0.02 segundos.
Artículos, Encontrados 34 registros
Documentos de investigación, Encontrados 4 registros
Artículos Encontrados 34 registros  1 - 10siguientefinal  ir al registro:
1.
11 p, 917.5 KB Functionalization of the interlayer surfaces of kaolinite by alkylammonium groups from ionic liquids / Letaief, Sadok (University of Ottawa. Centre for Catalysis Research and Innovation and Department of Chemistry) ; Detellier, Christian (University of Ottawa. Centre for Catalysis Research and Innovation and Department of Chemistry)
The objective of this studywas to design new, functional, nanostructured materials from the abundant claymineral kaolinite, in spite of development problems with the interlayer chemistry of kaolinite because of its non-swelling properties. [...]
2009 - 10.1346/CCMN.2009.0570510
Clays and Clay Minerals, Vol. 57, Núm. 5 (2009) , p. 638-648  
2.
11 p, 1.3 MB Effects of reaction conditions on the formation of todorokite at atmospheric pressure / Cui, Hao-Jie (Huazhong Agricultural University. College of Resources and Environment) ; Feng, Xiong-Han (Huazhong Agricultural University. College of Resources and Environment) ; He, Ji-Zheng (Chinese Academy of Sciences. Research Center for Eco-Environmental Sciences) ; Tan, Wen-Feng (Huazhong Agricultural University. College of Resources and Environment) ; Liu, Fan (Huazhong Agricultural University. College of Resources and Environment)
Todorokite is a common Mn oxide (with a tunnel structure) in the Earth surface environment, and can be obtained by hydrothermal treatment or refluxing process from precursor buserite with a layered structure. [...]
2006 - 10.1346/CCMN.2006.0540507
Clays and Clay Minerals, Vol. 54, Núm. 5 (2006) , p. 605-615  
3.
14 p, 931.1 KB Structural investigations of natural and synthetic chlorite minerals by x-ray diffraction, Mössbauer spectroscopy and solid-state nuclear magnetic resonance / Zazzi, Asa (Royal Institute of Technology. Department of Chemistry) ; Hirsch, Tomas K. (Stanford Synchrotron Radiation Laboratory) ; Leonova, Ekaterina (Stockholm University. Physical Chemistry Division) ; Kaikkonen, Andrei (Stockholm University. Physical Chemistry Division) ; Grins, Jekabs (Stockholm University. Inorganic Chemistry Division) ; Annersten, Hans (Uppsala University. Department of Earth Sciences) ; Edén, Mattias (Stockholm University. Physical Chemistry Division)
The structures of one synthetic and two natural chlorites of the chlinochlore type were explored using X-ray diffraction, magic-angle spinning nuclear magnetic resonance (NMR) and Mössbauer spectroscopy. [...]
2006 - 10.1346/CCMN.2006.0540210
Clays and Clay Minerals, Vol. 54, Núm. 2 (2006) , p. 252-265  
4.
12 p, 710.4 KB Fougerite, a new mineral of the pyroaurite-iowaite group : Description and crystal structure / Trolard, Fabienne (Géochimie des Sols et des Eaux) ; Bourrié, Guilhem (Géochimie des Sols et des Eaux) ; Abdelmoula, Mustapha (Université Henri Poincaré) ; Refait, Philippe (Université de La Rochelle) ; Feder, Frédéric (Internal Research Unit Environmental Risks of Recycling)
Fougerite (IMA 2003-057) is a mixed M(II)-M(III) hydroxysalt of the green rust group, where M(II) can be Fe or Mg, and M(III) is Fe. The general structural formula is: [Fe -x Fe Mg(OH)] [x/n A. mHO] where A is the interlayer anion and n its valency, with 1/4 ≤ x/(1+y) ≤ 1/3 and m ≤ (1-x+y). [...]
2007 - 10.1346/CCMN.2007.0550308
Clays and Clay Minerals, Vol. 55, Núm. 3 (2007) , p. 323-334  
5.
8 p, 749.3 KB The effect of amino acids on the dissolution rates of amorphous silica in near-neutral solution / Kawano, Motharu (Kagoshima University. Department of Earth and Environmental Sciences) ; Obokata, Sumine (Kagoshima University. The Graduate School of Science and Engineering)
Amino acids are ubiquitous in the Earth's surface environments as reactive biological molecules produced by every living thing including bacteria. To evaluate the effects of amino acids on mineral dissolution and to reveal the mechanism by which they interact with the mineral surface, we performed dissolution experiments of X-ray amorphous silica in solution containing 0. [...]
2007 - 10.1346/CCMN.2007.0550404
Clays and Clay Minerals, Vol. 55, Núm. 4 (2007) , p. 361-368  
6.
13 p, 786.1 KB Carbonate-Induced structural perturbation of Al hydroxides / Zhang, G.Y. (Agricultural University of Hebei. Department of Resources and Environmental Science) ; Hu, Y.F. (Canadian Light Source) ; Xu, R.K. (Chinese Academy of Sciences. Institute of Soil Science) ; Dynes, J.J. (McMaster University. Department of Chemistry) ; Blyth, R.I.R. (Canadian Light Source) ; Kozak, L.M. (University of Saskatchewan. Department of Soil Science) ; Huang, P.M. (University of Saskatchewan. Department of Soil Science)
The chemistry of Al transformation has been well documented, though little is known about the mechanisms of structural perturbation of Al precipitates by carbonates at a molecular level. The purpose of the present study was to investigate the structural perturbation of Al precipitates formed under the influence of carbonates. [...]
2009 - 10.1346/CCMN.2009.05706012
Clays and Clay Minerals, Vol. 57, Núm. 6 (2009) , p. 795-807  
7.
7 p, 361.8 KB Letter to the editor : On fougerite / Christianse, B.C. (University of Copenhagen. Nano-Science Center. Department of Chemistry) ; Dideriksen, K. (University of Copenhagen. Nano-Science Center. Department of Chemistry) ; Skovbjerg, L.L. (University of Copenhagen. Nano-Science Center. Department of Chemistry) ; Nedel, S. (University of Copenhagen. Nano-Science Center. Department of Chemistry) ; Stipp, S.L.S. (University of Copenhagen. Nano-Science Center. Department of Chemistry)
Fougerite (IMA 2003-057) was accepted by the Commission on New Minerals and Mineral Names of the International Mineralogical Association (IMA) in 2004 as a new mineral to represent the green rust (GR) family. [...]
2011 - 10.1346/CCMN.2011.0590102
Clays and Clay Minerals, Vol. 59, Núm. 1 (2011) , p. 3-9  
8.
8 p, 1.3 MB Study of the interaction between bentonite and a strain of bacillus mucilaginosus / Zhu, Yun (National Research Center for Geoanalysis) ; Li, Yan (Peking University. The Key Laboratory of Orogenic Belts and Crustal Evolution) ; Lu, Anhuai (Peking University. The Key Laboratory of Orogenic Belts and Crustal Evolution) ; Wang, Haoran (Peking University. The Key Laboratory of Orogenic Belts and Crustal Evolution) ; Yang, Xiaoxue (Peking University. The Key Laboratory of Orogenic Belts and Crustal Evolution) ; Wang, Changqiu (Peking University. The Key Laboratory of Orogenic Belts and Crustal Evolution) ; Cao, Weizheng (PetroChina Daqing Oilfield Company Ltd. Exploration and Development Research Institute) ; Wang, Qinghua (PetroChina Daqing Oilfield Company Ltd. Exploration and Development Research Institute) ; Zhang, Xiaolei (PetroChina Daqing Oilfield Company Ltd. Exploration and Development Research Institute) ; Pan, Danmei (Chinese Academy of Sciences Fuzhou. State Key Lab of Structural Chemistry Fujian Institute of Research on the Structure of Matter) ; Pan, Xiaohong (Chinese Academy of Sciences Fuzhou. State Key Lab of Structural Chemistry Fujian Institute of Research on the Structure of Matter)
Mineral-microbe interactions are widespread in a number of environmental processes such as mineral weathering, decomposition, and transformation. Both clay minerals and silicate-weathering bacteria are widely distributed in nature, and the latter contribute to weathering, diagenesis, and mineralization of major rock-forming minerals. [...]
2011 - 10.1346/CCMN.2011.0590511
Clays and Clay Minerals, Vol. 59, Núm. 5 (2011) , p. 538-545  
9.
12 p, 825.9 KB Raw material sources for the Roman Bracarense ceramics (NW Iberian Peninsula) / Prudêncio, M. Isabel (Instituto Tecnológico e Nuclear) ; Sequeira Braga, M. Amália (Universida de do Minho. Centro de Investigacao Geologica Ordenamento e Valorizacao de Recursos (CIG-R)) ; Oliveira, Felisbela (Câmara Municipal. Gabinete de Arqueologia) ; Dias, M. Isabel (Instituto Tecnológico e Nuclear) ; Delgado, Manuela (Universidade do Minho. Unidade de Arqueologia) ; Martins, Manuela (Universidade do Minho. Unidade de Arqueologia)
The Bracarense ceramics are characterized by a fine, pale yellow paste covered with a brownish yellow slip. The name is derived from Bracara Augusta, the Roman town located in the north of Portugal, where this type of ceramic paste was first found and identified. [...]
2006 - 10.1346/CCMN.2006.0540510
Clays and Clay Minerals, Vol. 54, Núm. 5 (2006) , p. 638-649  
10.
10 p, 1.8 MB Mineralogical composition of shallow soils on basic and ultrabasic rocks of East Fennoscandia and of the Ural Mountains, Russia / Lessovaia, S.N. (St. PetersburgState University) ; Polekhovsky, Yu S. (St. PetersburgState University)
The influence of epigenetic (pre-pedogenetic) alteration of basic and ultrabasic rocks leading to the formation of phyllosilicate mineral associations is not well known. The purpose of this study was to gain further understanding of the processes involved by investigating the mineral associations of shallow soils underlain by amphibolites and metamorphosed gabbro-diabases (East Fennoscandia) and by serpentinous dunites (olivinite) and metagabbro amphibolites (the Ural Mountains). [...]
2009 - 10.1346/CCMN.2009.0570408
Clays and Clay Minerals, Vol. 57, Núm. 4 (2009) , p. 476-485  

Artículos : Encontrados 34 registros   1 - 10siguientefinal  ir al registro:
Documentos de investigación Encontrados 4 registros  
1.
121 p, 14.0 MB The Clinical description, molecular etiology, and pathophysiological studies in cutaneous skeletal hypophosphatemia syndrome : a mosaic disorder of activating RAS mutations / Ovejero Crespo, Diana ; Chico Ballesteros, Ana, dir. ; Corcoy i Pla, Rosa, dir. ; Díez Pérez, Adolfo, dir. ; Leiva Hidalgo, Alberto de, dir. ; Universitat Autònoma de Barcelona. Departament de Medicina
Introducción: El síndrome Cutaneo Esquelético Fosfatémico (SCEF) es una enfermedad mosaica ultrarara causada por mutaciones RAS postzygóticas que se define por la asociación de nevus epidérmicos y/o melanocíticos, sobreproducción de factor de crecimiento fibroblastico-23 (FGF23), y lesiones displásicas óseas. [...]
Introduction: Cutaneous Skeletal Hypophosphatemia Syndrome (CSHS) is an ultra-rare mosaic disorder caused by postzygotic RAS mutations that is defined by the association of epidermal and/or melanocytic nevi, fibroblast growth factor-23 (FGF23) excess, and a skeletal dysplasia. [...]

[Barcelona] : Universitat Autònoma de Barcelona, 2017.
2 documentos
2.
13 p, 1.4 MB MineralSQL : Base de dades web per col·leccions de minerals / Asensi Jordà, Màrius ; Benítez Fernández, Yolanda, dir. (Universitat Autònoma de Barcelona. Departament de Ciències de la Computació) ; Universitat Autònoma de Barcelona. Escola d'Enginyeria
Des de ben petit he estat envoltat d'aficionats a l'estudi i el col·leccionisme de minerals. Això m'ha permès conèixer la dificultat que hi ha per gestionar correctament una col·lecció de minerals. [...]
Since l was a child l grow up surrounded by lovers of minerals collecting and their corresponding study. This personal background shows me how difficult is to manage a collection of minerals. The target of this project is to set a new, easy and quick system for cataloging and management of these amateur collections. [...]
Desde pequeño he estado rodeado de aficionados al estudio y el coleccionismo de minerales. Esto me ha permitido conocer la dificultad que hay para gestionar correctamente una colección de minerales. [...]

2017-06-27
Enginyeria Informàtica [958]  
3.
22 p, 8.6 MB Processos metamòrfics d'alta T en metapelites de baixa P en el complex HT-LP d'Osor : trajectòria progradant PT, flux de fluid progradant, metasomatisme i fusió hidratada dels gneisos pelítics amb g-bi -sil -cd-pl (Massís de Guilleries, CCR, NE Iberia) / Leoz Munté, Gisela ; Reche Estrada, Joan, dir. (Universitat Autònoma de Barcelona. Departament de Geologia) ; Universitat Autònoma de Barcelona. Facultat de Ciències
Els polsos termals de ràpid ascens relacionats amb un metamorfisme HT-LP podrien implicar el sobrepàs de reaccions de deshidratació, que es donessin taxes de producció de fluid més altes de l'usual, ràpids increments en la Pfluid i situacions que afectessin aquesta, com que la pressió litostàtica superés localment els esforços de tracció. [...]
Fast thermal pulses related to HT-LP metamorphism may imply dehydration reaction overstepping, higher than normal fluid production rates, quick local increases in Pfluid and common situations of Pfluid » Plitostatic surpassing locally the tensile stresses. [...]
Los pulsos termales de rápido ascenso relacionados con un metamorfismo HT-LP podrían implicar que se sobrepasaran reacciones de deshidratación, que se obtuvieran tasas de producción de fluido mayores a las usuales, rápidos ascensos en la Pfluido, y situaciones que afectaran a ésta, como que la presión litostática pudiera superar localmente los esfuerzos de tracción. [...]

2014
Grau en Sociologia [817]
2 documentos
4.
26 p, 1.9 MB Química mineral de les amfibolites de Bordelle i dels gneis de Lousada (Lugo, Zona Asturoccidental-Lleonesa del Massís Ibèric) / Velasco Arenós, Irene ; Galán García, Gumer, dir. (Universitat Autònoma de Barcelona. Departament de Geologia) ; Universitat Autònoma de Barcelona. Facultat de Ciències
Les metabasites i els gneis que afloren en la Zona Asturoccidental-Lleonesa han estat relacionats amb una activitat magmàtica lligada a un episodi de distensió. Anteriorment, aquestes roques han estat estudiades com a series bimodals a partir de dades petrogràfiques, d'una cartografia en detall i de les seves característiques geoquímiques en elements majors. [...]
Las metabasitas y los gneises que afloran en la Zona Asturoccidental-Leonesa han estado relacionados con una actividad magmática ligada a un episodio de distensión. Anteriormente, estas rocas han estado estudiadas como series bimodales a partir de datos petrográficos, de una cartografía en detalle y de sus características geoquímicas en elementos mayores. [...]
The metabasites and gneisses that outcrop in the Asturoccidental-Leonese Zone have been related to magmatic activity associated with an episode of distension. Previously, these rocks have been studied as bimodal series from petrographic data, detailed mapping and geochemical characteristics of its major elements. [...]

2014
Grau en Sociologia [817]  

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