نتایج جستجو برای: molybdenum metallurgy
تعداد نتایج: 16955 فیلتر نتایج به سال:
The alternative, heterometal-free nitrogenase of Rhodobacter capsulatus is repressed by traces of molybdenum in the medium. Strains carrying mutations located downstream of nifB copy II were able to express the alternative nitrogenase even in the presence of high molybdate concentrations. DNA sequence analysis of a 5.5-kb fragment of this region revealed six open reading frames, designated modA...
Molybdoenzymes are widespread in eukaryotic and prokaryotic organisms where they play crucial functions in detoxification reactions in the metabolism of humans and bacteria, in nitrate assimilation in plants and in anaerobic respiration in bacteria. To be fully active, these enzymes require complex molybdenum-containing cofactors, which are inserted into the apoenzymes after folding. For almost...
Defects usually play an important role in tailoring various properties of two-dimensional materials. Defects in two-dimensional monolayer molybdenum disulphide may be responsible for large variation of electric and optical properties. Here we present a comprehensive joint experiment-theory investigation of point defects in monolayer molybdenum disulphide prepared by mechanical exfoliation, phys...
Nickel and aluminum powders were mechanically alloyed with 10 or 30 vol.% refractory metal powders (molybdenum or tungsten) for times up to 50 h. Intermetallic synthesis takes place after lo-20 h alloying, with concomitant dispersion of the inert refractory metal phase, resulting in an NiAl matrix containing fine refractory dispersoids. The reactive synthesis step is direct, without intermediat...
introduction one of the best methods in the diagnosis and control of breast cancer is mammography. the importance of mammography is directly related to its value in the detection of breast cancer in the early stages, which leads to a more effective treatment. the purpose of this article was to calculate the x-ray spectrum in a mammography system with monte carlo codes, including mcnpx and mcnp5...
* corresponding author. e-mail: [email protected] The interaction of Mo(VI) and tetrazolium violet (TV) has been examined. The ion-associate formed is extracted into 1,2-dichloroethane. The tetrazolium violet : molybdenum(VI) : 3,4,5-trihydroxybenzoic acid ratio (R) is 2 : 1 : 2. The optimum conditions have been established. Beer’s law is obeyed in the range of 0.2–5 μg ml–1 molybdenum(VI...
Molybdenum electrode based flexible biosensor on porous polyamide substrates has been fabricated and tested for its functionality as a protein affinity based biosensor. The biosensor performance was evaluated using a key cardiac biomarker; cardiac Troponin-I (cTnI). Molybdenum is a transition metal and demonstrates electrochemical behavior upon interaction with an electrolyte. We have leveraged...
THE MINING REPORT Luisa Moreno, managing partner and analyst with Toronto-based Tahuti Global, says there are many things investors must pay attention to when it comes to critical metals projects, but nothing should trump metallurgy. That's because no two deposits are precisely the same, and having a clear understanding of how to economically recover those metals and get them into end-users' ha...
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