Nickel has been shown to be an essential trace element involved in the metabolism of several species of bacteria, archea, and plants. In these organisms, nickel is involved in enzymes that catalyze both non-redox (e.g., urease, glyoxalase I) and redox (e.g., hydrogenase, carbon monoxide dehydrogenase, superoxide dismutase) reactions, and proteins involved in the transport, storage, metallocente...

Nickel in urine and in air from the breathing zone of 18 male workers in a battery factory was determined weekly during 11 consecutive weeks. The study started immediately following three weeks of Christmas vacation. The nickel levels in air varied but did not increase with time. The average urinary excretion of nickel showed an increase during the first weeks, after which a steady state seemed...

Fig. 1. Allergic nickel dermatitis caused by nickel release from an electric shaver. Nickel allergy is frequent in adult Danes and dermatitis patients (1, 2). The high prevalence is mostly explained by consumer exposure to products that release nickel, e.g. watches, jewellery, buttons, zips, rivets and mobile phones (3–8). It has been debated whether classic dry electric shavers may cause nicke...

Urease activation is critical to the virulence of many human and animal pathogens. Urease possesses multiple, nickel-containing active sites, and UreE, the only nickel-binding protein among the urease accessory proteins, activates urease by transporting nickel ions. We performed NMR experiments to investigate the solution structure and the nickel-binding properties of Bacillus pasteurii (Bp) Ur...

Nickel is a ubiquitous trace element and it occurs in soil, water, air and of the biosphere. It is mostly used to manufacture stainless steel. Nickel is the commonest cause of metal allergy. Nickel allergy is a chronic and recurring skin problem; females are affected more commonly than males. Nickel allergy may develop at any age. Once developed, it tends to persist life-long. Nickel is present...

Nickel compounds are recognized to cause nasal and lung cancers. Magnesium is an effective protector against nickel-induced carcinogenesis in vivo, although its mechanisms of protection remain elusive. The effects of magnesium carbonate on the cytotoxicity and genotoxicity induced by nickel subsulfide were examined with respect to the inhibition of cell proliferation, micronuclei formation, DNA...

Nickel is released to the atmosphere by windblown dust, volcanoes, combustion of fuel oil, municipal incineration, and industries involved in nickel refining, steel production, and other nickel alloy production. The form of nickel emitted to the atmosphere is dependent upon the source. Complex nickel oxides, nickel sulfate, and metallic nickel are associated with combustion, incineration, and s...

Nickel is a ubiquitous trace element and the commonest cause of metal allergy among the people. Nickel allergy is a chronic, recurring problem; females are affected more commonly than males. Nickel allergy may develop at any age. Once developed, it tends to persist life-long. Nickel is present in most of the dietary items and food is considered to be a major source of nickel exposure for the ge...

with its well-known biological toxicity, the excessive concentrations of sulfide in tannery wastewaters may upset the biological treatment processes, thus leading to a substantial decrease in the efficiency of treatment plants. the presence of sulfide in wastewaters may dramatically interfere with microbial activities and consequently disturb the function of the system as a whole. in this study...

Fourteen Trichoderma isolates were evaluated for their tolerance to two heavy metals, nickel and cadmium. Three isolates, MT-4, UBT-18, and IBT-I, showed high levels of nickel tolerance, whereas MT-4, UBT-18, and IBT-II showed better tolerance of cadmium than the other isolates. Under nickel stress, biomass production increased up to a Ni concentration of 60ppm in all strains but then decreased...