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326.642  Articles
1 of 32.665 pages  |  10  records  |  more records»
Modernization and automation consoles goniometric X-ray diffractometer, which can perform X-ray texture analysis of metals at the present level. A specific example of the sample steel 08kp shows the use of a modernized and automated goniometer consoles fo... see more

Coronavirus disease 2019 (COVID-19) is a new type of respiratory infection that first emerged in December 2019 in Wuhan, Hubei, China. COVID-19 is caused by a new variant of virus called severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Examin... see more

Coffee is becoming one of the most popular beverages in Mexico. In the present work, X-ray Fluorescence (XRF) was used to determine the contents of several elements (with atomic numbers between 11 and 38) in 11 samples of commercial ground coffee, compari... see more

A theorem for planar case and its generalization for spatial case are proposed to determine the projection of a virtual displacement to the orientation under the case of knowing the projections of a virtual displacement to the given two or three orientati... see more

The black shale complex, which is organic carbon-bearing and characterized by syngenetic, epigenetic sulphidation and intense metamorphism in the Duruja structural-forma- tion zone of the southern slope of the Greater Caucasus, is the focus of geologists’... see more

In the reaction of acetone solutions of CoX2·nH2O (X = Cl, Br) with methyl pyruvate semi/thiosemicarbazone (Hmps, Hmpt) the first Co(II) com­plexes with these ligands, i.e., [Co(Hmps)(H2O)X2] (X = Cl (1), Br (2)), [Co(Hmpt)2][CoCl4]·2H2? (3) and [Co(Hmpt)... see more

SrTiO3 nano particles were prepared by sol-gel process in order to optimize the temperature condition to obtain good quality material for different applications. The thermal treating condition was selected out through XRD, FTIR and Raman analysis of the s... see more

Due to the demands of better (accurate and precise) analytical results using X-ray Fluorescence (XRF) at the Aerosol Laboratory, Instituto de Física, UNAM, it was necessary to carry out improvements in instrumentation and analytical procedures in the x-ra... see more

A significant place among structural methods to increase the accuracy of measuring converters  occupy iterative methods of error correction based on a well-developed in mathematics the theory of iterative methods. At the same time, the measurement te... see more

1 of 32.665 pages  |  10  records  |  more records»