نتایج جستجو برای: old iron mining

تعداد نتایج: 583104  

Journal: :American journal of physiology. Regulatory, integrative and comparative physiology 2008
Steven A Bloomer Kyle E Brown Garry R Buettner Kevin C Kregel

Environmental heat stress is associated with an age-related increase in hepatic oxidative damage and an exaggerated state of oxidative stress. The purpose of this investigation was to evaluate the regulation of hepatic iron after heat stress. A secondary aim was to determine a potential role for iron in heat stress-induced liver injury. Hyperthermia-induced alterations in hepatic iron were eval...

Journal: :Acta Crystallographica Section A Foundations of Crystallography 2009

Slope stability analysis is one of the most important problems in mining and geotechnical engineering. Ignoring the importance of these problems can lead to significant losses. Selecting an appropriate method to analyze the slope stability requires a proper understanding of how different factors influence the outputs of the analyses. This paper evaluates the effects of considering the real geom...

Journal: :Oryx 2022

Abstract Canga, or ironstone, ecosystems are hotspots of old-growth plant diversity and highly specialized cave invertebrates. These ancient metalliferous habitats amongst the most threatened because destruction caused by large-scale iron ore mining. International debate on biodiversity offsets is increasing these mechanisms seen as tools for potentially balancing economic development with cons...

Journal: :ACADEMIC JOURNAL Series: Industrial Machine Building, Civil Engineering 2017

In the context of open-pit mine planning, uncertainties including commodity price would significantly affect the technical and financial aspects of mining projects. A mine planning that takes place regardless of the uncertainty in price just develops an optimized plan at the starting time of the mining operation. Given the price change over the life of mine, which is quite certain, optimality o...

Journal: :Occupational and environmental medicine 2016
Christine S Lambert Bruce H Alexander Gurumurthy Ramachandran Richard F MacLehose Heather H Nelson Andrew D Ryan Jeffrey H Mandel

OBJECTIVES An excess of mesothelioma has been observed in iron ore miners in Northeastern Minnesota. Mining and processing of taconite iron ore generate exposures that include elongate mineral particles (EMPs) of amphibole and non-amphibole origin. We conducted a nested case-control study of mesothelioma in a cohort of 68,737 iron ore miners (haematite and taconite ore miners) to evaluate the a...

Journal: :Brazilian journal of microbiology : [publication of the Brazilian Society for Microbiology] 2018
Camila Cesário Fernandes Luciano Takeshi Kishi Erica Mendes Lopes Wellington Pine Omori Jackson Antonio Marcondes de Souza Lucia Maria Carareto Alves Eliana Gertrudes de Macedo Lemos

Human activities on the Earth's surface change the landscape of natural ecosystems. Mining practices are one of the most severe human activities, drastically altering the chemical, physical and biological properties of the soil environment. Bacterial communities in soil play an important role in the maintenance of ecological relationships. This work shows bacterial diversity, metabolic repertoi...

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