全部文献期刊学位论文会议报纸专利标准年鉴图书|学者科研项目
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作者:Xiaoming Chen , Simon Bates , Kenneth R. Morris
来源:[J].Journal of Pharmaceutical and Biomedical Analysis(IF 2.947), 2001, Vol.26 (1), pp.63-72Elsevier
摘要:Abstract(#br)The objective of this study was to demonstrate the applicability of parallel beam X-ray powder diffraction (XRPD) and a new method for whole pattern fitting to the quantification of the residual amount of amorphous content in a pharmaceutical solid using lactose as ...
作者:N. C. Popa , D. Balzar
来源:[J].Journal of Applied Crystallography(IF 3.343), 2008, Vol.41 (3), pp.615-627Wiley
摘要:... The model effectiveness is demonstrated on a ZnO powder pattern exhibiting strongly anisotropic size broadening and pronounced super‐Lorentzian peak shapes. Moreover, it is shown how the apparent crystallites can be interpreted in terms of physical models by using ellipsoi...
作者:Nathan J. Takas , Jennifer A. Aitken
来源:[J].Journal of Solid State Chemistry(IF 2.04), 2007, Vol.180 (7), pp.2034-2043Elsevier
摘要:... An empirical whole pattern fitting method was used to determine the polymorphic phase composition over time. The resulting data were evaluated using several solid-state kinetic models. The kinetics of this transition has been determined to be best described by either one- o...
作者:Fei Deng Ph.D. , Xiaodong Lin M.L. , Yonghong He Ph.D. ...
来源:[J].Journal of Forensic Sciences(IF 1.244), 2015, Vol.60 (4), pp.1040-1045Wiley
摘要:Abstract(#br)Quantitative phase analysis ( QPA ) is helpful to determine the type attribute of the object because it could present the content of the constituents. QPA by Rietveld method requires neither measurement of calibration data nor the use of an internal standard; however...
作者:S. Divakara , G. N. Siddaraju , R. Somashekar
来源:[J].Fibers and Polymers(IF 0.912), 2010, Vol.11 (6), pp.861-868Springer
摘要:... The merits and demerits of natural and man-made polymers were quantified in terms of microcrystalline parameters, determined by whole powder pattern fitting technique, which is an extension of single order method developed by us.
作者:S. Divakara , A. R. Niranjana , R. Somashekar
来源:[J].Cellulose(IF 3.476), 2009, Vol.16 (6), pp.1187-1200Springer
摘要:... Further, the microstructural parameters such as crystal size 〈 N 〉 and lattice strain ( g in %) have been determined by a whole powder pattern fitting technique developed by us. In all these cases we note that the stacking and twin faults are quite significant in determ...
作者:T. Ungár , M. Leoni , P. Scardi
来源:[J].Journal of Applied Crystallography(IF 3.343), 1999, Vol.32 (2), pp.290-295Wiley
摘要:Anisotropic strain broadening in X‐ray or neutron powder diffraction can cause severe difficulties in whole powder‐pattern fitting and Rietveld structure refinement. Several phenomenological models have been proposed to deal with this problem. These, however, lack physically...
作者:Y. H. Dong , P. Scardi
来源:[J].Journal of Applied Crystallography(IF 3.343), 2000, Vol.33 (1), pp.184-189Wiley
摘要:... It can be used for an unconstrained profile fitting (pattern decomposition, PD) or constrained modelling of the whole powder pattern (Pawley method, PM), for single‐ as well as multiple‐phase samples. The program output includes: lattice parameters or peak positions ...
作者:A. Le Bail , A. Jouanneaux
来源:[J].Journal of Applied Crystallography(IF 3.343), 1997, Vol.30 (3), pp.265-271Wiley
摘要:Anisotropic line broadening in cell‐constrained whole‐powder‐pattern fitting (including the Rietveld method) is proposed to be modelled qualitatively. The object is primarily to improve the fit, with the expectation of an increase in the feasibility of an ab initio struc...
作者:Toivo Kallaste , Jüri Nemliher
来源:[J].Journal of Applied Crystallography(IF 3.343), 2005, Vol.38 (4), pp.587-594Wiley
摘要:A wholepattern fitting of X‐ray diffraction (XRD) patterns, including lattice‐parameter and size–strain analysis, was elaborated and applied to a sample set of extant and fossil vertebrate tooth apatite. Recent and subfossil human tooth enamel and dentine, extant and ...

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