نتایج جستجو برای: x ray diffractometry
تعداد نتایج: 664824 فیلتر نتایج به سال:
Use of X-ray Diffractometry for Identification of Different Fritillaria Traditional Chinese Medicine
Crystal structure of zwitterionic trimethylammoniopropane sulfonate (Z1-Methyl) was determined by single-crystal X-ray diffractometry. Z1-Methyl crystallized in the monoclinic system, space group P2(1), with a = 6.3639(2), b = 10.9237(4), c = 8.1505(4) A, beta = 111.078(2) degrees, V = 528.69(4) A3, Z = 2. An inter-molecular ionic association was observed in the crystal. The shortest distance b...
Plant biominerals are not always well characterized, although this information is important for plant physiology and can be useful for taxonomic purposes. In this work, fresh plant material of seven wild neotropical species of genus Canna, C. ascendens, C. coccinea, C. indica, C. glauca, C. plurituberosa, C. variegatifolia and C. fuchsina sp. ined., taken from different habitats, were studied t...
The article investigates the effect of rapid thermal annealing ternary GaAs 1-x N x /GaAs solid solutions on distribution nitrogen atoms in crystal lattice. samples are studied by photoluminescence spectroscopy and high-resolution X-ray diffractometry. Due to size electronegativity mismatch arsenic atoms, is incorporated unevenly into Options arrangement lattice before after shown. Keywords: di...
The investigation of the thermal behavior of calcium fructoborate samples of composition Ca(C 6 H 10 O 6 BO) 2 .3.5H 2 O showed that CaB 2 O 4 is generated as the final solid pyrolysis residue. On the basis of these observations a new, very easy, synthetic procedure for the preparation of high purity samples of this calcium borate is proposed. The material was characterized by X ray powder diff...
Diagnosis of primary and secondary coxarthrosis even today remains the privilege of medical experience and is based only on patient symptoms. We propose to use thermal analysis measurements as an objective method of diagnosing bone pathology and the degree of disease severity. Thermal analysis can be performed on few milligrams of bone tissue harvested by outpatient biopsy. For validation of th...
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