Crystal growth study of K-F nanozeolite and its catalytic behavior in Aldol condensation of benzaldehyde and heptanal enhanced by microwave heating

2017 ◽  
Vol 196 ◽  
pp. 295-301 ◽  
Author(s):  
Siew-Fang Wong ◽  
Krittanun Deekomwong ◽  
Jatuporn Wittayakun ◽  
Tau Chuan Ling ◽  
Oki Muraza ◽  
...  
Keyword(s):  
Crystal Growth ◽  
Microwave Heating ◽  
Aldol Condensation ◽  
Growth Study ◽  
Catalytic Behavior

Preferential crystallisation and comparative crystal growth study between pure enantiomer and racemic mixture of a chiral molecule: 5-ethyl-5-methylhydantoin

2001 ◽  
Vol 56 (7) ◽  
pp. 2281-2294 ◽  
Author(s):  
Stéphane Beilles ◽  
Pascal Cardinael ◽  
Elias Ndzié ◽  
Samuel Petit ◽  
Gérard Coquerel
Keyword(s):  
Crystal Growth ◽  
Racemic Mixture ◽  
Chiral Molecule ◽  
Growth Study ◽  
Pure Enantiomer

Docetaxel (Taxotere® Trihydrate) Forms: Crystal Structure Determination from XRPD & XRSCD Data

2004 ◽  
Vol 443-444 ◽  
pp. 411-0 ◽  
Author(s):  
L. Zaske ◽  
M.-A. Perrin ◽  
C. Daiguebonne ◽  
O. Guillou
Keyword(s):  
Crystal Structure ◽  
Crystal Growth ◽  
Degrees Of Freedom ◽  
Atomic Scale ◽  
Thin Plates ◽  
Water Molecules ◽  
Ambient Conditions ◽  
Strong Anisotropy ◽  
Growth Study ◽  
Space Method

Docetaxel (form A), a stoichiometric hydrate containing three water molecules per molecule of drug substance (Taxotere®), is thermodynamically stable under ambient conditions of pressure, temperature and relative humidity. In order to gain a better understanding of docetaxel system at the atomic scale a structural study was performed. Due to strong anisotropy of crystals (thin plates), the crystal structure of docetaxel (29 degrees of freedom) was solved and refined using high resolution XRPD data applying an ab initio direct space method. In parallel, an in-depth crystal growth study was carried out until single crystals suitable for XRSCD structural resolution were obtained: surprisingly, a new polymorph of docetaxel, called form B, was isolated.

Crystal growth study of CaGa2S4 Co-doped with Ce3+ and Na+

2008 ◽  
Vol 69 (2-3) ◽  
pp. 400-403 ◽  
Author(s):  
Shinya Oikawa ◽  
Chiharu Hidaka ◽  
Takeo Takizawa
Keyword(s):  
Crystal Growth ◽  
Growth Study ◽  
Co Doped

A simple 2D composite image analysis technique for the crystal growth study of L-ascorbic acid

2017 ◽  
Vol 80 (6) ◽  
pp. 615-626 ◽  
Author(s):  
Krishan Kumar ◽  
Virender Kumar ◽  
Jatin Lal ◽  
Harmeet Kaur ◽  
Jasbir Singh
Keyword(s):  
Ascorbic Acid ◽  
Image Analysis ◽  
Crystal Growth ◽  
Growth Study ◽  
Composite Image ◽  
Image Analysis Technique ◽  
Analysis Technique

Contribution of neodymium optical spectroscopy to the crystal growth study of a silicate apatite in a glassy matrix

2008 ◽  
Vol 30 (11) ◽  
pp. 1694-1698 ◽  
Author(s):  
D. de Ligny ◽  
G. Panczer ◽  
D. Caurant ◽  
D.R. Neuville
Keyword(s):  
Crystal Growth ◽  
Optical Spectroscopy ◽  
Glassy Matrix ◽  
Growth Study

scholarly journals The Effect of Microwave on the Crystallization Behavior of CMAS System Glass-Ceramics

Materials ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 4555
Author(s):  
Hangren Li ◽  
Saiyu Liu ◽  
Wence Xu ◽  
Yuxuan Zhang ◽  
Xin Li ◽  
...  
Keyword(s):  
Crystal Growth ◽  
Metal Ions ◽  
Microwave Heating ◽  
Materials Science ◽  
Microwave Sintering ◽  
Glass Ceramics ◽  
Glass Network ◽  
Microwave Effect ◽  
Active Metal ◽  
Crystal Growth Mechanism

The microwave sintering of glass-ceramics, non-thermal microwave effect, and crystal growth mechanism remain important challenges in materials science. In this study, we focus on developing approaches to affect crystal growth in the glass network of glass-ceramics by microwave heating, rather than performing a single study on the crystal structure and type. Raman spectroscopy is used to detect the structure of the glass network. We demonstrated that the non-thermal microwave effect promoted the diffusion of metal ions, which promoted the aggregation and precipitation of metal ions in the glass network to form crystals. The samples produced by microwave heating contain more non-bridging oxygen bonds than conventional sintered samples; therefore, the non-thermal microwave effect has a depolymerization effect on the glass network of the sample. Under the influence of microwave field, many metal ions precipitate, which precipitates many crystal nuclei. In addition, many active metal ions are captured during the crystal nucleus growth, which shortens the sintering process of glass-ceramics.

The phase and crystal-growth study of group-III nitrides in a 2000°C at 20GPa region

2007 ◽  
Vol 300 (1) ◽  
pp. 26-31 ◽  
Author(s):  
H. Saitoh ◽  
W. Utsumi ◽  
H. Kaneko ◽  
K. Aoki
Keyword(s):  
Crystal Growth ◽  
Group Iii Nitrides ◽  
Growth Study ◽  
Group Iii

Growth Study of p-Type 4H-SiC with Using Aluminum and Nitrogen Co-Doping by 2-Zone Heating Sublimation Method

2015 ◽  
Vol 821-823 ◽  
pp. 47-50 ◽  
Author(s):  
Kazuma Eto ◽  
Tomohisa Kato ◽  
Satoru Takagi ◽  
Tomonori Miura ◽  
Yasushi Urakami ◽  
...  
Keyword(s):  
Crystal Growth ◽  
Growth Study ◽  
Co Doping ◽  
Sublimation Method ◽  
P Type ◽  
Relationship Of ◽  
The Relationship

p-type SiC crystals doped with aluminum and nitrogen were grown by the sublimation method. We found that Al and N co-doping is effective for stabilized growth of p-type 4H-SiC polytype. We studied the relationship of polytype of grown crystals and the condition of Al and N feeding during the crystal growth. p-type 4H-SiC withp~1 x 1018cm-3are stably-obtained with this method.

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