Brazilian tungsten panorama (w) between 2008 and 2014
نویسندگان
چکیده
منابع مشابه
Interfaces between Model Co-W-C Alloys with Various Carbon Contents and Tungsten Carbide
Interfaces between alloys simulating binders in WC-Co cemented carbides and tungsten carbide were examined on the micro-, nano-, and atomic-scale. The precipitation of fine WC grains and η-phase occurs at the interface of the alloy with the low carbon content. The precipitation of such grains almost does not occur in the alloy with the medium-low carbon content and does not take place in the al...
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Introduction: The extent to which the material that accreted to the proto-Earth and segregated to form the core chemically and isotopically equilibrated with the silicate mantle is an outstanding problem in planetary science. This question is particularly important when trying to assign a meaningful age for planetary accretion and core formation based on the Hf-W isotope systematics [1,2,3,4]. ...
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INTRODUCTION Influenza surveillance was conducted in Uganda from October 2008 to December 2014 to identify and understand the epidemiology of circulating influenza strains in out-patient clinic attendees with influenza-like illness and inform control strategies. METHODOLOGY Surveillance was conducted at five hospital-based sentinel sites. Nasopharyngeal and/or oropharyngeal samples, epidemiol...
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The spectrum of doubly ionized tungsten (W III) was produced in a sliding-spark discharge and recorded photographically on the NIST 10.7-m normal-incidence vacuum spectrograph in the 600-2680 Å spectral region. The analysis has led to the establishment of 71 levels of the interacting 5d4, 5d3 6s and 5d2 6s2 even configurations and 164 levels of the interacting 5d3 6p and 5d2 6s 6p odd ones. A t...
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BACKGROUND The HIV surveillance system in Germany is based on mandatory, anonymous notification of newly diagnosed HIV cases by laboratories. Because the time between HIV infection and the diagnosis of HIV varies widely between persons, it is difficult to determine the number of cases of recent HIV infection among newly diagnosed cases of HIV. In Germany, the BED-capture-enzyme immunoassay (BED...
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ژورنال
عنوان ژورنال: Revista Científica Multidisciplinar Núcleo do Conhecimento
سال: 2018
ISSN: 2448-0959
DOI: 10.32749/nucleodoconhecimento.com.br/quimica-en/tungsten