نتایج جستجو برای: crystal growth from solution

تعداد نتایج: 6471512  

Journal: :Biophysical journal 2000
L Perera C Foley T A Darden D Stafford T Mather C T Esmon L G Pedersen

A solution structure for the complete zymogen form of human coagulation protein C is modeled. The initial core structure is based on the x-ray crystallographic structure of the gamma-carboxyglutamic acid (Gla)-domainless activated form. The Gla domain (residues 1-48) is modeled from the x-ray crystal coordinates of the factor VII(a)/tissue factor complex and oriented with the epidermal growth f...

2014
Christopher Farley Geoffry Burks Thomas Siegert Douglas H. Juers

In macromolecular cryocrystallography unit-cell parameters can have low reproducibility, limiting the effectiveness of combining data sets from multiple crystals and inhibiting the development of defined repeatable cooling protocols. Here, potential sources of unit-cell variation are investigated and crystal dehydration during loop-mounting is found to be an important factor. The amount of wate...

Journal: :Clinical science 1982
B Fellström U Backman B G Danielson K Holmgren S Ljunghall B Wikström

1. Freshly voided urine from healthy subjects was pooled and ultrafiltered (10,000 daltons). The ultrafiltrable and the macromolecular portions were preincubated with calcium oxalate, uric acid and sodium urate crystals and the effects on the inhibitory activity of calcium oxalate crystal growth assessed by monitoring the disappearance of [14C]oxalate from the solution. 2. The inhibitory activi...

Journal: :Journal of colloid and interface science 2001
Michael M. Reddy Anthony R. Hoch

Calcite crystal growth rates measured in the presence of several polycarboxyclic acids show that tetrahydrofurantetracarboxylic acid (THFTCA) and cyclopentanetetracarboxylic acid (CPTCA) are effective growth rate inhibitors at low solution concentrations (0.01 to 1 mg/L). In contrast, linear polycarbocylic acids (citric acid and tricarballylic acid) had no inhibiting effect on calcite growth ra...

Journal: :Science and technology of advanced materials 2011
Yoshiyuki Yonezawa Mina Ryo Aki Takigawa Yuji Matsumoto

4H-SiC is a wide-bandgap semiconductor with potential applications in power devices. The lack of a liquid phase in SiC hinders conventional crystal growth from the melt; consequently, SiC wafers still have low quality and are nearly 100 times more expensive than Si wafers. To take advantage of the solution growth for improving the quality and reducing the cost of SiC, Ni addition to Si-Ti flux ...

2003
M. D. Aggarwal J. Stephens A. K. Batra R. B. Lal

High quality bulk single crystals of novel NLO semiorganics : L-arginine tetrafluoroborate (L-AFB) and L-histidine tetrafluoroborate (L-HFB) measuring 78 × 50 × 35 mm have been successfully grown from solution by temperature lowering methods. Solubility curves of these materials have been determined in different solvents, such as water, ethanol and acetone to determine the most suitable solvent...

Journal: :Journal of dental research 1984
T Aoba C Yoshioka T Yagi E C Moreno

High-resolution electron microscopy (HREM) was applied to the study of seeded crystal growth of hydroxyapatite (HA) in supersaturated solutions. The HA seed crystals were rod-shaped, elongated along the c-axis, and showed smooth contours. The seed crystals exhibited hexagonal prism facets, and one end was rhombohedrally terminated, whereas the opposite end was blunt. Growth experiments were car...

2014
G. Senthil Murugan P. Ramasamy

Polar organic nonlinear optical material, L-tartaric acid single crystals have been grown from slow evaporation solution growth technique. Single crystal X-ray diffraction study indicates that the grown crystal crystallized in monoclinic system with space group P21. Crystalline perfection of the crystal has been evaluated by high resolution X-ray diffraction technique and it reveals that the cr...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد تهران مرکزی - دانشکده ادبیات و زبانهای خارجی 1390

abstract the current study set out to address the issue as to whether the implementation of portfolio assessment would give rise to iranian pre-intermediate efl learner autonomy. participants comprised 60 female in pre-intermediate level within the age range of 16-28.they were selected from among 90 language learners based on their scores on language proficiency test -key english test. then, t...

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