Results 91 to 100 of about 43,295 (211)
Beilstein Journal of Organic Chemistry, 2015 Asymmetric rotators with a 1,4-bis(ethynyl)bicyclo[2.2.2]octane (BCO) core are needed for engineering crystalline arrays of functional molecular rotors.
Cyprien Lemouchi, Patrick Batail
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Applications of synchrotron x-ray powder diffraction in hydrated cements: high-resolution and high-pressure studies [PDF]
, 2016 The main aim of this study is to apply synchrotron radiation techniques for the study of hydrated cement pastes. In particular, the tetracalcium aluminoferrite phase, C4AF in cement nomenclature, is the major iron-containing phase in Ordinary Portland ...
Cuesta-Garcia, Ana Maria +4 more
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Plants, 2016 In the context of climatic change, more heavy precipitation and more frequent flooding and waterlogging events threaten the productivity of arable farmland.
Houssein Diab, Anis M. Limami
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Heliyon, 2019 We describe the mathematical properties of pairwise comparisons matrices with coefficients in an arbitrary group. Inspired by the well-known mathematical structures of quantum gravity and lattice gauge theories in physics and by the application of this ...
Jean-Pierre Magnot
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H. B. Reitlinger and the origins of the Efficiency at Maximum Power formula for Heat Engines
, 2014 Even if not so ancient, the history of the heat engine efficiency at maximum power expression have been yet turbulent. More than a decade after the publication of the seminal article by Curzon and Ahlborn in 1975, one's rediscovered two older works by ...
Feidt, Michel +2 more
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Del incoloro al rojo a través del equilibrio
Educación Química, 2018 El estudio de las propiedades químicas de la materia ha entretenido durante siglos a los químicos del mundo. Las investigaciones realizadas en este campo durante el siglo xviir, en particular los trabajos hechos por Black, Cavendish, Pristley y ...
Kira Padilla
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Gold(I)‐Catalyzed Domino Cyclization for the Construction of Trispirocyclic Cyclohexanes
ChemistryEuropeAn unprecedented gold(I)‐catalyzed domino cyclization involving 2‐ethynylbenzyl alcohol derivatives and heterocyclic α,β‐unsaturated imines affords elaborated trispirocyclic cyclohexanes.
Manon Genet +3 more
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The Bureau International des Poids et Mesures: establishing standards in the physical sciences [PDF]
, 2002 In a vault on the outskirts of Paris, a cylinder of platinum-iridium sits in a safe under three layers of glass. It is the kilogram, kept by the Bureau International des Poids et Mesures (BIPM), which is the international home of metrology.
Mills, Ian
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Communications of the lunar planetary laboratory, volume 3, no. 40- the system of lunar craters, quadrant ii [PDF]
Observable properties of craters in second lunar ...
Agnieray, A. P. +4 more
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Blue, white, red. A tribute to Lavoisier
Revista Eureka sobre Enseñanza y Divulgación de las Ciencias, 2011 Se presenta una experiencia de Química en la que un líquido incoloro, que se muestra en una botella transparente, se vierte en tres vasos en apariencia vacios, apareciendo de forma sucesiva los colores azul, blanco y rojo.
García Liarte, Delia Ángeles +1 more
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