نتایج جستجو برای: controlled crystallization

تعداد نتایج: 405292  

2014
Liang Sun Anaïs Pitto-Barry Nigel Kirby Tara L. Schiller Ana M. Sanchez M. Adam Dyson Jeremy Sloan Neil R. Wilson Rachel K. O’Reilly Andrew P. Dove

Co-crystallization of polymers with different configurations/tacticities provides access to materials with enhanced performance. The stereocomplexation of isotactic poly(L-lactide) and poly(D-lactide) has led to improved properties compared with each homochiral material. Herein, we report the preparation of stereocomplex micelles from a mixture of poly(L-lactide)-b-poly(acrylic acid) and poly(D...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2013
Marc Behl Karl Kratz Ulrich Noechel Tilman Sauter Andreas Lendlein

Reading out the temperature-memory of polymers, which is their ability to remember the temperature where they were deformed recently, is thus far unavoidably linked to erasing this memory effect. Here temperature-memory polymer actuators (TMPAs) based on cross-linked copolymer networks exhibiting a broad melting temperature range (ΔT(m)) are presented, which are capable of a long-term temperatu...

Journal: :Molecules 2011
Jiri Kos Monika Pentakova Zbynek Oktabec Lukas Krejcik Zuzana Mandelova Pavla Harokova Jana Hruskova Tomas Pekarek Ondrej Dammer Marcela Tkadlecova Jaroslav Havlicek Jarmila Vinsova Vladimir Kral Jiri Dohnal Josef Jampílek

The gastrointestinal absorption of bisphosphonates is in general only about 1%. To address this problem mixtures of risedronate monosodium salt with twelve varied sugar alcohols, furanoses, pyranoses and eight gluco-, manno- and galactopyranoside derivatives as counterions were designed in an effort to prepare co-crystals/new entities with improved intestinal absorption. Crystalline forms were ...

2014
So-Ra Park

An electric field was applied to a conductive layer to induce Joule heating in order to generate the intense heat needed to carry out the crystallization of amorphous silicon. Complete crystallization was observed via Joule heating under typical processing conditions. Crystallization was accomplished throughout the sample within the range of microseconds of the heating, thus demonstrating the p...

2001
Angela Y. Lin Larry L. Augsburger David Pope

This study investigates the crystallization of the endogenous surfactant nonoxynol 100 in Eudragit NE30D-free films during storage and the influences of nonoxynol 100 on the dissolution of diphenhydramine hydrochloric acid (HCl) pellets coated with Eudragit NE30D before and after aging at ambient conditions. Polarizing light microscopy showed that when Eudragit NE30D-free films were stored at a...

2014
Ying Zhu Li-Na Zhu Rui Guo Heng-Jun Cui Sheng Ye Qun Fang

Large-scale screening of hundreds or even thousands of crystallization conditions while with low sample consumption is in urgent need, in current structural biology research. Here we describe a fully-automated droplet robot for nanoliter-scale crystallization screening that combines the advantages of both automated robotics technique for protein crystallization screening and the droplet-based m...

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