Results 21 to 30 of about 278,464 (312)

Polymer or macrocycle? : cobalt complexes of ditopic 2,2':6',2"-terpyridine ligands with flexible spacers [PDF]

open access: yes, 2010
The reaction of transition metal ions with ditopic ligands containing two 2,2':6',2"-terpyridine units linked by flexible spacers can give metallosupramolecular polymers, discrete metallomacrocycles or mixtures of the two.
Harris, Emily Kate
core   +1 more source

Dynamic and static analysis of a kind of novel J energy-releasing bolts

open access: yesGeomatics, Natural Hazards & Risk, 2020
Energy-absorbing rockbolt is now recognized as an important support element in deep mines around the world. A novel kind of energy-absorbing bolt called J-bolt was developed, which consists of anchoring (damping) module, deformation module, blending ...
Xingdong Zhao   +5 more
doaj   +1 more source

Cobalt-Catalyzed Alkylation of Nitriles with Alcohols

open access: yes, 2022
Herein, we report an operationally convenient, cobalt-catalyzed alkylation of aryl nitriles employing primary and secondary alcohols (>30 examples, up to 86% yield). The use of readily available cobalt precursors and the widely employed BIAN (BIAN = bis­(
Arpita Singh (232434)   +3 more
core   +1 more source

Exposure to cobalt in the production of cobalt and cobalt compounds and its effect on the heart [PDF]

open access: yesOccupational and Environmental Medicine, 2004
Aims:To investigate whether exposure to cobalt in cobalt plants has any measurable effect on the cardiovascular system.Methods:Occupational, cross sectional study, using a self administered questionnaire, blood pressure measurement, electrocardiography, and laboratory tests in which 203 male workers with at least one year of exposure to cobalt and 94 ...
A, Linna   +6 more
openaire   +2 more sources

Analysis of Support Design in Weak Rock Drift Using a Systematic Approach

open access: yesAdvances in Civil Engineering, 2020
The aim of this study is to develop a systematic approach for support design of weak rock drift based on empirical, analytical, and numerical method, which is employed to estimate weak rock support demand and design support system.
Xingdong Zhao   +4 more
doaj   +1 more source

Allosteric inhibition of cobalt binding to albumin by fatty acids : implications for the detection of myocardial ischemia [PDF]

open access: yes, 2012
The biomarker "ischemia-modified albumin" (IMA), measured by the albumin-cobalt-binding assay (ACB assay), is the only FDA-approved biomarker for early diagnosis of myocardial ischemia.
Peter J. Sadler   +11 more
core   +1 more source

Cobalt-Catalyzed Migration Isomerization of Dienes

open access: yes, 2022
A cobalt-catalyzed multipositional isomerization of conjugated dienes has been reported for the first time using an 8-oxazoline iminoquinoline ligand. This reaction is operationally simple and atom-economical using readily available starting materials ...
Guoxiong Xu (5211989)   +6 more
core   +1 more source

Cobalt-Catalyzed Hydrocyanation of Methylenecyclopropanes to Homoallylic Nitriles

open access: yes, 2022
We describe herein a novel synthesis of various homoallylic nitriles via cobalt-catalyzed hydrocyanation of methylenecyclopropanes. Excellent selectivity, mild reaction conditions, good functional group compatibility, gram-scale reaction, and product ...
Mingdong Jiao (9547521)   +1 more
core   +1 more source

Key Technology Research on the Efficient Exploitation and Comprehensive Utilization of Resources in the Deep Jinchuan Nickel Deposit

open access: yesEngineering, 2017
To understand the resource features and geology in the deep Jinchuan nickel deposit, difficult geological conditions were systematically analyzed, including high stress, fragmentized ore rock, prevalent deformation, difficult tunnel support, complicated ...
Zhiqiang Yang
doaj   +1 more source

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