نتایج جستجو برای: copper workers
تعداد نتایج: 195896 فیلتر نتایج به سال:
Workers at metal machining workstations are exposed to airborne dust particles containing metals and their compounds. Their harmful impact on the workers' health depends on both their chemical composition and their distribution. The aim of this study was to determine the content of metals in dust fractions emitted in the process of mechanical machining of products made of brass, steel and cast ...
Using a case-control study comprising about 600 men with lung cancer in northern Sweden the potential risk of different occupations and groups of occupations was studied. Longitudinal data concerning occupation, employment, and smoking habits were obtained by questionnaires. Some occupational groups (underground miners, copper smelter workers, electricians, and plumbers) exposed to previously k...
The mechanism of aluminium-induced cytotoxicity has not yet been defined. This study investigated possible changes in essential elements in workers occupationally exposed to Al fumes. It included 60 exposed workers and a matching control group of 60 employees not occupationally exposed to Al. Mean serum copper, calcium, zinc and iron were significantly lower in the exposed group than in control...
Zinc is one of the essential elements in biological system. The role of this element in many enzymes has been proved. Zinc has an antagonistic effect on the toxic elements such as cadmium, as both binds to a carrier protein called metalothionein . Zinc can be found in atmosphere of different industrial environment. Due to its importance, it's concentration in the serum of 399 Male workers of sa...
A polytetrafluoroethylene-carbon nanofiber nanocomposite coating is applied on a copper substrate with an aluminum primer for superhydrophobicity to facilitate jumping dropwise condensation. While being durable and scalable, the delivers extreme heat transfer improvements up ≈900%. More details can be found in article number 2001176 by Dimos Poulikakos co-workers.
Epidemic meticillin-resistant Staphylococcus aureus (EMRSA) emerged in the early 1980s with EMRSA-15 and -16 being the most prevalent strains within the UK. MRSA transmission between patients is largely via the hands of healthcare workers, and contamination of the hospital environment may occur. The objective of this study was to evaluate the effectiveness of copper and brass to reduce the viab...
The contribution of environmental surface contamination with pathogenic organisms to the development of health care-associated infections (HAI) has not been well defined. The microbial burden (MB) associated with commonly touched surfaces in intensive care units (ICUs) was determined by sampling six objects in 16 rooms in ICUs in three hospitals over 43 months. At month 23, copper-alloy surface...
Parkinsonism is one of the major neurological symptoms in Wilson disease, and young workers who worked in the copper smelting industry also developed Parkinsonism. We have reported the specific neurotoxic action of copper dopamine complex in neurons with dopamine uptake. Copper dopamine complex (100 microm) induces cell death in RCSN-3 cells by disrupting the cellular redox state, as demonstrat...
The Cover Feature illustrates the C−N coupling of aniline and aryl bromide in cavity a supramolecular copper phenanthroline calix[8]arene catalyst. In their Research Article, R. A. Talmazan, J. Refugio Monroy co-workers showed how encapsulation an otherwise poor Cu(I) catalyst by enhances catalytic activity for between amines halides. Yields up to 92% were achieved with low loadings (2.5% mol)....
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