Results 261 to 270 of about 966,011 (311)

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   +4 more sources

Crystallization of Pharmaceutical Crystals

2015
The aim of this chapter is to provide students as well as industrial and academic research scientists who intend to tackle crystallization of pharmaceutical crystals with theory and practical examples. Crystallization involves two separate processes, nucleation and growth, which are rarely completely unconnected.
Veesler, S., Puel, François
openaire   +3 more sources

Is there a crystal clear definition of a crystal?

Zeitschrift für Kristallographie, 2007
To clearly define the objects one is working with is a prerequisite for sound scientific work. In particular, a comparison of results is impossible without. In this view, one needs a clear-cut definition of what a crystal is supposed to be. Moreover, in view of the large community of people working with them, it is desirable to even have a well ...
Baake, Michael, Frettlöh, Dirk
openaire   +2 more sources

The Tough Journey of Polymer Crystallization: Battling with Chain Flexibility and Connectivity

Macromolecules, 2019
Theoretical approaches addressing the mechanism of polymer crystallization remain the great challenge in polymer science. Numerous different, or even conflicting, models/theories have been proposed during the past several decades.
Xiaoliang Tang, Wei Chen, Liangbin Li
semanticscholar   +1 more source

Sparse matrix sampling: a screening method for crystallization of proteins

, 1991
A set of screening conditions for initial experiments in protein crystallization has been developed, tested, and is herein presented. These solution and precipitant conditions are empirically derived based on known or published crystallization conditions
J. Jancarik, Sung-Hou Kim
semanticscholar   +1 more source

Crystallized vortex crystals

The European Physical Journal D - Atomic, Molecular and Optical Physics, 1998
Numerical simulations of the equations of motion of 300 charged particles confined to a plane with an additional magnetic field orthogonal to the plane reproduce recently observed self-organization of non-neutral plasmas into a small number of interacting vortices. In the presence of damping we observe crystallized vortices, i.e.
Reinhold Blümel, B. Reusch
openaire   +2 more sources

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

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

Accelerated crystallization of zeolites via hydroxyl free radicals

Science, 2016
Radically faster synthesis Zeolite synthesis normally proceeds under basic conditions that allow the oxide bridges between aluminum and silicon atoms to break and reform. Feng et al.
Guodong Feng, Pengyu Cheng, Wenfu Yan, M. Boronat, Xu Li, Jihu Su, Jianyu Wang, Yi Li, A. Corma, Da Xu, Jihong Yu   +10 more
semanticscholar   +1 more source

Crystal Design and Crystal Engineering

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