Results 1 to 10 of about 59,241 (258)

Lowering the Mo limit for nitrogen fixation by Mo-nitrogenase [PDF]

open access: yesCommunications Earth & Environment
Archean ocean marine primary productivity may have been limited by biologically available nitrogen. Due to low molybdenum abundances, early biological nitrogen fixation is thought to have relied on alternative nitrogenases that incorporate vanadium or ...
Zackry Stevenson   +6 more
doaj   +2 more sources

Molybdenum [PDF]

open access: yesAdvances in Nutrition, 2018
Molybdenum, a trace element essential for micro-organisms, plants, and animals, was discovered in 1778 by a Swedish chemist named Karl Scheele. Initially mistaken for lead, molybdenum was named after the Greek work molybdos, meaning lead-like. In the 1930s, it was recognized that ingestion of forage with high amounts of molybdenum by cattle caused a ...
Janet A, Novotny, Catherine A, Peterson
openaire   +3 more sources

Corrosion resistance of FeCrAl coatings on Mo–La alloys

open access: yesFenmo yejin jishu, 2023
FeCrAl coatings were deposited on the surface of Mo–La alloys by the non-equilibrium magnetron sputtering process. The corrosion resistance and corrosion mechanism of the FeCrAl coatings were investigated.
XI Sha   +5 more
doaj   +1 more source

Research progress on the properties and application of molybdenum disulfide

open access: yesFenmo yejin jishu, 2021
Molybdenum disulfide has been widely used in electronic devices, catalysts, and biomedical fields, due to the special layered structure and the unique properties.
LI Jing   +4 more
doaj   +1 more source

Effect of hot isostatic pressing sintering temperature on the properties of Mo–Na alloys

open access: yesFenmo yejin jishu, 2022
Mo–Na alloys were prepared by the hot isostatic pressing (HIP) sintering. The effects of HIP sintering temperature on the microstructure, hardness, density, and Na mass fraction of the Mo–Na alloys were studied.
WANG Na   +9 more
doaj   +1 more source

Process Mineralogy of Molybdenum Ore with High Oxidation Rate in Sandaozhuang Mining Area

open access: yesKuangchan zonghe liyong, 2023
This is an essay in the field of process mineralogy. By means of chemical multi-element analysis, chemical phase analysis, optical microscope and automatic mineral parameter analysis system (MLA), the systematic research on process mineralogy of the ...
Jianping Jin   +6 more
doaj   +1 more source

Microstructure and High-Temperature Performance of High K-Doped Tungsten Fibers Used as Reinforcement of Tungsten Matrix

open access: yesCrystals, 2022
Tungsten (W) fiber-reinforced tungsten (Wf/W) composite with ultra-high strength and high-temperature resistance is considered an attractive candidate material for plasma-facing materials (PFM) in future fusion reactors.
Xiangcao Jiang   +6 more
doaj   +1 more source

Fabrication, microstructure, and properties of W–Re/graphite composites

open access: yesFenmo yejin jishu, 2021
The W‒Re/graphite composites were sintered by vacuum hot-pressing sintering at 1850 ℃ and 30 MPa, using the W–Re plates and the graphite blocks as the raw materials and the Mo/Zr mixed powders as the solder.
YU Chen-xu
doaj   +1 more source

Preparation technology of tungsten silicide alloys used for sputtering target

open access: yesFenmo yejin jishu, 2021
W–Si alloy blocks were prepared by vacuum calcination, using the W and Si mixed powders as the raw materials, and the W–Si sputtering targets followed the requirements of semiconductor application were successfully prepared by crushing and sintering. The
HUANG Zhi-min   +4 more
doaj   +1 more source

Variable residual activity of K-Othrine® PolyZone and Actellic® 300 CS in semi-field and natural conditions in the Democratic Republic of the Congo

open access: yesMalaria Journal, 2021
Background Indoor Residual Spray (IRS) against vector mosquitoes is a primary means for combating malaria transmission. To combat increased patterns of resistance to chemicals against mosquito vectors, alternative candidate insecticide formulations ...
Leonard M. Ngwej   +6 more
doaj   +1 more source

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