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Articles 154 records found  beginprevious75 - 84nextend  jump to record: Search took 0.00 seconds. 
75.
13 p, 1007.2 KB Guidottiite, the mn-analogue of cronstedtite : A new serpentine-group mineral from south africa / Wahle, Michael W. (University of Illinois at Chicago. Department of Earth and Environmental Sciences) ; Bujnowski, Thomas J. (University of Illinois at Chicago. Department of Earth and Environmental Sciences) ; Guggenheim, Stephen (University of Illinois at Chicago. Department of Earth and Environmental Sciences) ; Kogure, Toshihiro (The University of Tokyo. Department of Earth and Planetary Science)
The objective of this paper is to describe the new serpentine group mineral, guidottiite, which is analogous to cronstedtite. Guidottiite has an ideal chemical composition of (MnFe)(SiFe)O(OH)4. The sample is from the N'chwaning 2 mine, Kalahari manganese field, Republic of South Africa, and apparently forms from hydrothermal solutions. [...]
2010 - 10.1346/CCMN.2010.0580307
Clays and Clay Minerals, Vol. 58, Núm. 3 (2010) , p. 364-376  
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76.
23 p, 1.4 MB The charge of component layers of illite-smectite in bentonites and the nature of end-member illite / Środoń, Jan (Institute of Geological Sciences PAN) ; Zeelmaekers, Edwin (University of Leuven. Laboratory for Applied Geology and Mineralogy) ; Derkowski, Arkadiusz (Institute of Geological Sciences PAN)
The nature of component layers of mixed-layer illite-smectite and their possible evolution in the course of illitization have been debated since the 1960s. The present study is a new attempt to solve these problems, using samples collected from diverse geological formations around the world. [...]
2009 - 10.1346/CCMN.2009.0570511
Clays and Clay Minerals, Vol. 57, Núm. 5 (2009) , p. 649-671  
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77.
20 p, 288.5 KB Surface area and layer charge of smectite from CEC and EGME/H2O-retention measurements / Środoń, Jan (Institute of Geological Sciences PAN) ; McCarty, Douglas K. (Chevron ETC)
The total specific surface area (TSSA) and smectitic layer charge (Q) calculated from the structural formulae and unit-cell dimensions of 12 pure smectite samples were used as a reference in the design and evaluation of TSSA and Q measurement techniques based on cation exchange capacity (CEC), HO retention at 47% RH, and ethylene glycol monoethyl ether (EGME) retention. [...]
2008 - 10.1346/CCMN.2008.0560203
Clays and Clay Minerals, Vol. 56, Núm. 2 (2008) , p. 155-174  
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78.
14 p, 1.8 MB Density functional theory (dft) study of the hydration steps of Na+/Mg2+/Ca2+/Sr2+/Ba2+ -exchanged montmorillonites / Berghout, Abid (Universitédes Sciences et Technologie de Lille, CitéScientifique. Laboratoire de Géie Civil et gé-Environment) ; Tunega, Daniel (University of Natural Resources and Applied Life Sciences Vienna. Institute of Soil Research) ; Zaoui, Ali (Universitédes Sciences et Technologie de Lille, CitéScientifique. Laboratoire de Géie Civil et gé-Environment)
Theoretical models of the mechanical properties of hydrated smectites, saturated with a variety of cations, are of much value in determining the potential for their use in various applications, including clay-polymer nanocomposites, but the development of such models is still in its infancy. [...]
2010 - 10.1346/CCMN.2010.0580204
Clays and Clay Minerals, Vol. 58, Núm. 2 (2010) , p. 174-187  
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79.
13 p, 1.7 MB The determinative role of the exchange cation and layer-charge density of smectite on aflatoxin adsorption / Deng, Youjun (Texas A and M University. Department of Soil and Crop Sciences) ; Liu, Lian (Texas A and M University. Department of Soil and Crop Sciences) ; Velázquez Barrientos, Ana Luisa (Texas A and M University. Department of Soil and Crop Sciences) ; Dixon, Joe B. (Texas A and M University. Department of Soil and Crop Sciences)
Using bentonites to adsorb aflatoxin is an effective method of minimizing the toxicity of aflatoxin to animals and humans. Early studies indicated a more than 10-fold difference in aflatoxin adsorption capacity among different bentonites. [...]
2012 - 10.1346/CCMN.2012.0600404
Clays and Clay Minerals, Vol. 60, Núm. 4 (2012) , p. 374-386  
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80.
8 p, 1.2 MB Ab initio molecular dynamics study of Fe-containing smectites / Liu, Xiandong (Nanjing University. School of Earth Sciences and Engineering) ; Meijer, Evert Jan (University of Amsterdam. Van't Hoff Institute for Molecular Sciences and Amsterdam Center for Multiscale Modeling) ; Lu, Xiancai (Nanjing University. School of Earth Sciences and Engineering) ; Wang, Rucheng (Nanjing University. School of Earth Sciences and Engineering)
In order to identify the influences imposed by Fe substitution, density functional theory-based Car-Parrinello molecular dynamics simulations were employed to study both oxidized and reduced Febearing smectites. [...]
2010 - 10.1346/CCMN.2010.0580109
Clays and Clay Minerals, Vol. 58, Núm. 1 (2010) , p. 89-96  
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81.
12 p, 770.6 KB Layer charge density of smectites - Closing the gap between the structural formula method and the alkyl ammonium method / Kaufhold, Stephan (BGR Bundesanstalt für Geowissenschaften und Rohstoffe) ; Dohrmann, Reiner (LBEG Landesamt für Bergbau. Energie und Geo logie) ; Stucki, Joseph W. (University of Illinois. Department of Natural Resources and Environmental Sciences) ; Anastácio, Alexandre S. (University of Illinois. Department of Natural Resources and Environmental Sciences)
The layer charge density (LCD) of montmorillonite represents the permanent negative charge, its most important property. The LCD can be determined by two different methods, the structural formula method(SF M) and the alkylammonium method(AAM). [...]
2011 - 10.1346/CCMN.2011.0590208
Clays and Clay Minerals, Vol. 59, Núm. 2 (2011) , p. 200-211  
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82.
30 p, 970.1 KB A hexa-quinoline based C 3-symmetric chemosensor for dual sensing of zinc(ii) and PPi in an aqueous medium via chelation induced "oFF-ON-OFF" emission / Sinha, Sanghamitra (Indian Association for the Cultivation of Science) ; Chowdhury, Bijit (Indian Association for the Cultivation of Science) ; Adarsh, Nayarassery N. (Institut Català de Nanociència i Nanotecnologia) ; Ghosh, Pradyut (Indian Association for the Cultivation of Science)
A quinoline-based C-symmetric fluorescent probe (1), N,N',N''-((2,4,6-trimethylbenzene-1,3,5-triyl)tris(methylene))tris(1-(quinolin-2-yl)-N-(quinolin-2-ylmethyl)methanamine), has been developed which can selectively detect Zn without the interference of Cdvia significant enhancement in emission intensity (fluorescence "turn-ON") associated with distinct fluorescence colour changes and very low detection limits (35. [...]
2018 - 10.1039/c8dt00611c
Dalton transactions, Vol. 47, Issue 19 (May 2018) , p. 6819-6830  
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83.
18 p, 1.6 MB Assessing the reliability of predicted plant trait distributions at the global scale / Boonman, Coline C. F. (Radboud University. Department of Environmental Science) ; Benítez López, Ana (Radboud University. Department of Environmental Science) ; Schipper, Aafke M. (Radboud University. Department of Environmental Science) ; Thuiller, Wilfried (Université Grenoble Alpes) ; Anand, Madhur (University of Guelph. School of Environmental Sciences) ; Cerabolini, Bruno Enrico Leone (Università degli Studi dell'Insubria. Dipartimento di Scienze Teoriche e Applicate) ; Cornelissen, J. H. C. (Vrije Universiteit Amsterdam. Department of Ecological Science) ; Gonzalez-Melo, Andres (Universidad del Rosario (Bogotà, Colòmbia). Facultad de Ciencias Naturales y Matematicas) ; Hattingh, Wesley (University of the Witwatersrand) ; Higuchi, Pedro (Santa Catarina State University) ; Laughlin, Daniel C. (University of Wyoming. Department of Botany) ; Onipchenko, Vladimir (Moskovskiĭ gosudarstvennyĭ universitet im. M.V. Lomonosova) ; Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals) ; Poorter, Lourens (Wageningen University. Forest Ecology and Forest Management Group) ; Soudzilovskaia, Nadejda A. (Leiden University. Environmental Biology Department) ; Huijbregts, Mark A. J. (Institute for Water and Wetland Research) ; Santini, Luca (Institute for Water and Wetland Research)
Predictions of plant traits over space and time are increasingly used to improve our understanding of plant community responses to global environmental change. A necessary step forward is to assess the reliability of global trait predictions. [...]
2020 - 10.1111/geb.13086
Global ecology and biogeography, Vol. 29, Issue 6 (June 2020) , p. 1034-1051  
Detailed record - Creative Commons
84.
6 p, 546.8 KB What can we learn from first principles multi-scale models in catalysis? The role of the Ni/Al2O3 interface in water-gas shift and dry reforming as a case study / Foppa, Lucas (Eidgenössische Technische Hochschule Zürich. Department of Chemistry and Applied Biosciences) ; Larmier, Kim. (IFP Energies Nouvelles) ; Comas-Vives, Aleix (Universitat Autònoma de Barcelona. Departament de Química)
Computational first principles models based on density functional theory (DFT) have emerged as an important tool to address reaction mechanisms and active sites in metal nanoparticle catalysis. However, the common evaluation of potential energy surfaces for selected reaction steps contrasts with the complexity of reaction networks under operating conditions, where the interplay of adsorbate populations and competing routes at reaction conditions determine the most relevant states for catalyst activity and selectivity. [...]
2019 - 10.2533/chimia.2019.239
Chimia, Vol. 73, issue 4 (2019) , p. 239-244  
Detailed record - Creative Commons

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