نتایج جستجو برای: crystalline

تعداد نتایج: 39953  

Journal: :FEBS letters 1971
G Strous J Van Westreenen H Bloemendal

Please be advised that this information was generated on 2017-03-31 and may be subject to change.

ژورنال: طب کار 2014

Background: Silicosis as a most important work-related lung disease is generated of inhalation crystalline silica dust. Chemicals health risk assessment is essential to decide on priorities for control action and reduce the risk to an acceptable level. The aim of this study is evaluate workers' exposure to crystalline silica (quartz) and determine the qualitative and quantitative health risk le...

2001
J. D. Gorter A. Y. Glikson

–Gorter and Glikson (2000) proposed that the Fohn-1 structure in the Timor Sea north of Australia probably is an impact structure. Examination of their evidence reveals that it is almost impossible to confirm any of their conclusions, as the authors do not provide sufficient detail of their experimental methods. Problems with the presentation of both seismic and geochemical data cast further do...

Journal: :Applied optics 2016
J E Gómez-Correa V Coello A Garza-Rivera N P Puente S Chávez-Cerda

Ray tracing in spherical Luneburg lenses has always been represented in 2D. All propagation planes in a 3D spherical Luneburg lens generate the same ray tracing, due to its radial symmetry. A geometry without radial symmetry generates a different ray tracing. For this reason, a new ray tracing method in 3D through spherical and elliptical Luneburg lenses using 2D methods is proposed. The physic...

Journal: :Chemical communications 2005
Yongqiang Wen Yanlin Song Dongbo Zhao Kuiling Ding Jiang Bian Xue Zhang Jingxia Wang Yang Liu Lei Jiang Daoben Zhu

Coumarin and thiocoumarin, which are usually thermally unreactive for dimerization, were dimerized in their inclusion crystalline complexes under thermal and high vacuum conditions.

Journal: :Vision Research 1995
David A. Atchison George Smith

Because of the complexity of tracing rays through a gradient refractive index medium, the human eye's lens is sometimes approximated by a shell structure with constant refractive index within shells. In the shell model, power arises from a combination of an axial variation in index and the curvatures of the shell surfaces. We develop an equation which gives the power due to the gradient index o...

2004
FRANK J. LOVICU MICHAEL L. ROBINSON Frank J. Lovicu Michael L. Robinson

2016
Hong-Bo Wang Hai-Tao Yu Quan-Fu Sun

This review paper presents an overview of individual monitoring, as well as the national dose register and dose record management of radiation workers in China. Progress has recently been made on the individual monitoring of radiation workers. A critical analysis of current status and problems in individual monitoring is also presented and necessary future research on individual monitoring, suc...

Journal: :Applied optics 1997
K J Voss Y Liu

A new system to measure the natural skylight polarized radiance distribution has been developed. The system is based on a fish-eye lens, CCD camera system, and filter changer. With this system sequences of images can be combined to determine the linear polarization components of the incident light field. Calibration steps to determine the system 's polarization characteristics are described. Co...

Journal: :international journal of iron & steel society of iran 2011
a. r. arefpour a. monshi a. saidi t. khayamian

mold powders in continuous casting of steel contain fluorine through mainly caf2 and occasionally naf andna3alf6. fluorine develops dangerous gases such as sif4 and hf at high temperatures. in this study, caf2 is partly replaced by substances such as na2co3, zno and fe2o3.sulfur free portland cement clinker containing gypsum was used as a new product base. these additions developed comparable v...

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