Results 251 to 260 of about 462,393 (297)

Crystal-to-Crystal Photodimerizattons

Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals, 1994
Abstract Most [2+2 photodimerizations proceed heterogeneously, i.e. at a certain conversion phase separation occurs which leads to the destruction of the parent crystal. The crystal fragmentation can be avoided by irradiation in the long wavelength tail of the absorption.
Kathleen Novak, Volker Enkelmann, Kenneth B. Wagener, Gerhard Wegner   +3 more
openaire   +2 more sources

Crystallization mechanisms of acicular crystals

Journal of Crystal Growth, 2008
Abstract In this contribution, we present an experimental investigation of the growth of four different organic molecules produced at industrial scale with a view to understand the crystallization mechanism of acicular or needle-like crystals. For all organic crystals studied in this article, layer-by-layer growth of the lateral faces is very slow ...
Puel, F., Verdurand, E., Taulelle, P., Bebon, C., Colson, D., Klein, J.P., Veesler, S.   +6 more
openaire   +3 more sources

Progress to Date in the Design and Operation of Continuous Crystallization Processes for Pharmaceutical Applications

Organic Process Research & Development, 2019
Continuous crystallization has gained interest in the pharmaceutical sector as part of the drive toward the transition from exclusive batch manufacturing to integrated continuous manufacturing in this industry.
Barbara Wood, K. P. Girard, Christopher S. Polster, D. Croker   +3 more
semanticscholar   +1 more source

Crystal Design and Crystal Engineering

Angewandte Chemie International Edition, 2003
No abstract.
openaire   +3 more sources

Models of secondary nucleation attributable to crystal‐crystallizer and crystal‐crystal collisions

AIChE Journal, 1974
AbstractThe rate of secondary nucleation of ice, assumed to be proportional to the product of collision frequency and impact energy, has been quantitatively modeled using idealized representations of collisions between crystals and either other crystals or surfaces in the crystallizer.
G. Margolis, T. W. Evans, Adel F. Sarofim   +2 more
openaire   +2 more sources

Crystallization

2014
crystallization
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Motion of Crystal/Crystal and Crystal/Amorphous Interfaces

MRS Proceedings, 1990
AbstractMotion of ordered twin/matrix interfaces in films of silicon on sapphire occurs during high temperature annealing. This process is shown to be thermally activated and is analogous to grain boundary motion. Motion of amorphous/crystalline interfaces occurs during recrystallization of CoSi2 and NiSi2 from the amorphous phase. In-situ transmission
openaire   +2 more sources

Crystal Morphology and Crystal Symmetry

2003
Crystallography grew up empirically as a branch of mineralogy. It was supported by laws deduced from observations, such as the law of constancy of interfacial angles and the law of rational intercepts, and involved mainly the recognition, description, and classification of naturally occurring crystal species, that is, it was a study of the morphology ...
Rex A. Palmer, Mark Ladd
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crystallization

Catalysis from A to Z, 2020

semanticscholar   +1 more source

Crystal morphology, optical properties of crystals and crystal mounting

2006
The first section of the chapter, Section 5.1.1, begins with a general description of crystal morphology and how the handedness of biological molecules limits the space groups they can crystallize in. Description of the proportion of solvent in macromolecular crystals, introduced by Matthews in 1968, is also included.
J. P. Glusker, H. L. Carrell
openaire   +2 more sources