نتایج جستجو برای: mineral industry

تعداد نتایج: 257253  

Journal: :Journal of animal science 2008
J C Peters D C Mahan

Dietary trace mineral sources and levels were fed to developing gilts to evaluate their performance responses during the growth phase, but treatments were continued into the reproductive phase in which subsequent reproductive responses were evaluated. In Exp. 1, three groups of gilts (n = 216) were used in a 2 x 2 factorial in a randomized complete block design (6 replicates) with treatment die...

2017
Shengtong Sun Denis Gebauer Helmut Cölfen

While nature exerts precise control over the size and chemical composition of minerals, this is still a challenging task for artificial syntheses. Despite its significance, until now, there are still no reports on colloidal mineral nanoparticles in the subnanometer range. Here we developed a general gas diffusion strategy using 10,12-pentacosadiynoic acid as a ligand and ethanol as a solvent to...

Journal: :Waste management 2004
Lawrence J Sikora

A by-product of the construction aggregate industry is fines or dust that contain trace elements such as zinc and copper and significant amounts of iron, aluminum, silica and potassium. Beneficial uses for these materials have been proposed such as replenishing depleted soils and amendment in mixtures of organic byproducts prior to composting. To evaluate the beneficial uses in composting, outd...

Journal: :Report on carcinogens : carcinogen profiles 2002

The carcinogenicity of exposure to untreated and mildly treated mineral oils has been evaluated in numerous studies in a variety of occupations, including metal working, jute processing, mulespinning, newspaper press operation, and other newspaper work. Exposure to mineral oils was consistently and strongly associated with an increased risk of cancer of the scrotum and skin (squamous-cell carci...

Journal: :Epidemiology 2013
Hsiao-Yu Yang Ruei-Hao Shie Pau-Chung Chen

BACKGROUND Studies of the health effects of non-asbestiform asbestos minerals remain inconclusive. Nephrite is a type of non-asbestiform tremolite mineral. We assessed the risk for pulmonary fibrosis in workers who process nephrite. METHODS A cross-sectional study that included 344 stone workers and their families was undertaken in Taiwan in 2010. The diagnostic criteria for pulmonary fibrosi...

Journal: :ChemSusChem 2012
Alex M Bradshaw Thomas Hamacher

Following the lead of the European Union in introducing binding measures to promote the use of regenerative energy forms, it is not unreasonable to assume that the global demand for combustible raw materials for energy generation will be reduced considerably in the second half of this century. This will not only have a favourable effect on the CO(2) concentration in the atmosphere, but will al...

Journal: :Chemical science 2017
Shengtong Sun Denis Gebauer Helmut Cölfen

While nature exerts precise control over the size and chemical composition of minerals, this is still a challenging task for artificial syntheses. Despite its significance, until now, there are still no reports on colloidal mineral nanoparticles in the subnanometer range. Here we developed a general gas diffusion strategy using 10,12-pentacosadiynoic acid as a ligand and ethanol as a solvent to...

Journal: :The Winners 2023

The research aimed to determine the causes of imports by analyzing upstream and downstream sides existing aluminium industrial chain. applied a descriptive-exploratory approach collecting secondary data from credible sources. Interviews focus group discussions with appropriate experts were also conducted obtain supporting data. Research shows that will continue both in short long term. It is du...

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