Results 41 to 50 of about 36,759 (293)
Columbium Versus Niobium [PDF]
Science, 1914 AT a meeting of the council of the International Association of Chemical Societies in Brussels, last September, a committee on inorganic nomenclature, among other recommendations, endorsed the name and symbol “niobium” and “Nb”, for the element which was originally named columbium.
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Niobium-Centered C−C Coupling of Isonitriles
, 2016 The complexes [NbI2(CNtBu)6]I (1), [NbI2(CNtBu)4(tBuNHC⋮CNHtBu)]I (2), and cis-[NbI(CO)2(CNR)2dppe] (R = tBu (3a), Cy (3b)), have been prepared by oxidation of [Nb(CO)6]- with iodine in the presence of isonitrile either in a direct reaction (1 and 2) or,
Hauke Schmidt (3083535) +3 more
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Molecular Oncology, EarlyView.This review summarizes the transcription factors, repressive chromatin‐modifying complexes, and epigenetic mechanisms that control fetal hemoglobin repression. Notably, many regulators of γ‐globin silencing also function in transcriptional and epigenetic networks that drive cancer, highlighting opportunities to translate advances in hemoglobinopathy ...
Meigen Yu +3 more
wiley +1 more source
Influence of grain size and niobium content on the creep resistance of ferritic stainless steels [PDF]
, 2008 Includes abstract.Includes bibliographical references (leaves 98-102).Type 441 ferritic stainless steel is used for the production of catalytic converter housings.
Cain, Victoria
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Preparation and Certification of Niobium-Tantalum Concentrate Reference Materials
Yankuang ceshi, 2018 BACKGROUND Niobium-tantalum concentrate reference materials play an important role in monitoring mineral smelting and sample analysis. There is a great demand of niobium-tantalum concentrate reference materials in the dressing plant and metallurgical ...
ZHAO Xiao-liang +5 more
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Molecular Oncology, EarlyView.Incomplete microwave ablation (iMWA) of liver cancer triggers a biphasic progression in residual tumors. At Day 3, the microenvironment is characterized by acute inflammatory responses and extracellular matrix (ECM) remodeling. By Day 14, a profound shift occurs toward oncogenic signal transduction and immunosuppression, marked by macrophage ...
Yu Liu +9 more
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Influence of Niobium on the Beginning of the Plastic Flow of Material during Cold Deformation
The Scientific World Journal, 2013 Investigations were conducted on low-carbon steel and the steel with same chemical composition with addition of microalloying element niobium. While tensile testing was carried out, the thermographic measurement was tacking place simultaneously.
Stoja Rešković, Ivan Jandrlić
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Corrosion behaviour of sintered Ti–Ni–Cu–Nb in 0.9% NaCl environment
Journal of Materials Research and Technology, 2015 The uniform and localized corrosion behaviour of sintered Ti–Ni containing niobium and copper additions were studied using potentiodynamic and cyclic polarization measurements in 0.9% sodium chloride.
Moipone Linda Lethabane +2 more
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THE DETERMINATION OF NIOBIUM IN URANIUM-NIOBIUM ALLOYS [PDF]
, 1956 Niobium is determined as the peroxy complex in concentrated sulfuric acid by photometric measurement at 360 m mu . Uranium interference is cancelled by using a solution of the sample for reference in the photometric measurement. The method covers the determination of niobium in uranium --niobium alloys made from pure melting stock.
Bryson, T. C. +2 more
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Heterotropic regulation and negative homotropic cooperativity
FEBS Open Bio, EarlyView.We identified a structural module common to some proteins that couple negative cooperativity with heterotropic regulation, two features that rarely coexist. These proteins are ring‐like and present an ordered asymmetry whereby noncontacting subunits are symmetric, and their tertiary structure differs from that of contacting subunits.
Veronica Morea +5 more
wiley +1 more source