نتایج جستجو برای: cobalt sulfide

تعداد نتایج: 47517  

Journal: :Occupational medicine 2010
R Sauni A Linna P Oksa H Nordman M Tuppurainen J Uitti

BACKGROUND Cobalt has been shown to induce mainly asthma, allergic contact dermatitis and hard metal disease. The data on cobalt asthma are mainly based on case reports. AIMS To characterize all the cases of occupational cobalt asthma encountered in a cobalt plant at the time of diagnosis and 6 months later. We also evaluated the incidence of cobalt asthma in different departments on the basi...

2017
Yedluri Anil Kumar S Srinivasa Rao Dinah Punnoose Chebrolu Venkata Tulasivarma Chandu V V M Gopi Kandasamy Prabakar Hee-Je Kim

In this study, cobalt sulfide (CoS) electrodes are synthesized using various solvents such as water, ethanol and a combination of the two via a facile chemical bath deposition method on Ni foam. The crystalline nature, chemical states and surface morphology of the prepared CoS nanoparticles are characterized using X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy...

2005
Irina V. Belova Graeme E. Murch

Experiments on the formation of hollow nanocrystals of cobalt sulphide by way of the Kirkendall effect have been reported recently by Yin et al. We perform a set of Monte Carlo simulations of the process to explore the phenomenon. 1. Introduction A recent experiment on cobalt nanocrystals heated in sulphur at 180 ºC showed the fascinating formation of hollow nanospheres of cobalt sulphide by th...

Journal: :The Journal of experimental biology 2001
J E Doeller M K Grieshaber D W Kraus

The ribbed mussel Geukensia demissa inhabits sulfide-rich coastal sediments with a distribution that suggests a preference for exposure to sulfide. Although sulfide is a respiratory poison, it is also a potent reductant. Geukensia demissa gill mitochondria can use sulfide as a respiratory substrate for ATP production, and the gills of this species exhibit sulfide-supported oxygen consumption th...

2017
Matjaž Kristl Brina Dojer Sašo Gyergyek Janja Kristl

Nickel and cobalt sulfides are promising materials in different cutting-edge research areas like solar cells, supercapacitors, catalysts, and electrode materials. Nickel and cobalt sulfides with various stoichiometries have been synthesized sonochemically from Ni(CH3COO)2 ∙ 4H2O, Co(CH3COO)2 ∙ 2H2O and different sulfur precursors using a direct immersion ultrasonic probe. The products were char...

2017
Guanjie He Mo Qiao Wenyao Li Yao Lu Tingting Zhao Rujia Zou Bo Li Jawwad A. Darr Junqing Hu Maria‐Magdalena Titirici Ivan P. Parkin

Metal sulfides are commonly used in energy storage and electrocatalysts due to their redox centers and active sites. Most literature reports show that their performance decreases significantly caused by oxidation in alkaline electrolyte during electrochemical testing. Herein, S and N co-doped graphene-based nickel cobalt sulfide aerogels are synthesized for use as rechargeable alkaline battery ...

2018
Chunyan Zhang Xiaoyi Cai Yao Qian Haifeng Jiang Lijun Zhou Baosheng Li Linfei Lai Zexiang Shen Wei Huang

A lightweight, flexible, and highly efficient energy management strategy is highly desirable for flexible electronic devices to meet a rapidly growing demand. Herein, Ni-Co-S nanosheet array is successfully deposited on graphene foam (Ni-Co-S/GF) by a one-step electrochemical method. The Ni-Co-S/GF composed of Ni-Co-S nanosheet array which is vertically aligned to GF and provides a large interf...

Journal: :Applied and environmental microbiology 2000
L Lüthy M Fritz R Bachofen

A push-pull method, previously used in groundwater analyses, was successfully adapted for measuring sulfide turnover rates in situ at different depths in the meromictic Lake Cadagno. In the layer of phototrophic bacteria at about 12 m in depth net sulfide consumption was observed during the day, indicating active bacterial photosynthesis. During the night the sulfide turnover rates were positiv...

2016
Brent Hoff

Trace minerals are required for essentially all biochemical processes in the body. Many of these minerals are necessary for optimal growth, physiologic function, and productivity in animals. This paper focuses on 8 trace minerals: cobalt (Co), copper (Cu), iodine (I), iron (Fe), manganese (Mn), molybdenum (Mo), selenium (Se), and zinc (Zn). These trace minerals have been chosen because nutritio...

2015
Weijia Zhou Jian Zhou Yucheng Zhou Jia Lu Kai Zhou Linjing Yang Zhenghua Tang Ligui Li Shaowei Chen

Development of non-noble-metal catalysts for hydrogen evolution reaction (HER) with both excellent activity and robust stability has remained a key challenge in the past decades. Herein, for the first time, Ndoped carbon-wrapped cobalt nanoparticles supported on N-doped graphene nanosheets were prepared by a facile solvothermal procedure and subsequent calcination at controlled temperatures. Th...

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