نتایج جستجو برای: nickel chromite

تعداد نتایج: 34669  

Journal: :Cancer research 1984
R B Ciccarelli K E Wetterhahn

The in vivo binding of nickel to chromatin, nucleic acids, and nuclear proteins from rat kidney and liver was investigated. Evidence is presented for the direct interaction of nickel with chromatin from rat tissues following i.p. injection of nickel carbonate. A gentle DNA isolation procedure was developed and used to isolate nickel-bound whole chromatin, DNA + histone octamer complex (polynucl...

Journal: :Contact dermatitis 2015
Anja Kickinger-Lörsch Thomas Bruckner Vera Mahler

BACKGROUND The former 'EU Nickel Directive' and, since 2009, the REACH Regulation (item 27 of Annex XVII) do not include all metallic objects. The nickel content of tools is not regulated by the REACH Regulation, even if they may come into in prolonged contact with the skin. Tools might be possible sources of nickel and cobalt sensitization, and may contribute to elicitation and maintenance of ...

Journal: :Environmental Health Perspectives 1994
L F Wu C Navarro K de Pina M Quénard M A Mandrand

The facultative anaerobic enterobacterium Escherichia coli requires the activity of nickel-containing hydrogenase for its anaerobic growth. Deficiency of the specific nickel transport system led to a hydrogenase-minus phenotype and slowed down the fermentative growth in the nik mutant. Addition of 300 microM nickel to the growth medium could restore the hydrogenase activity. This restoration re...

Journal: :Environmental Health Perspectives 2002
Adriana R Oller

The many chemical forms of nickel differ in physicochemical properties and biological effects. Health assessments for each main category of nickel species are needed. The carcinogenicity assessment of water-soluble nickel compounds has proven particularly difficult. Epidemiologic evidence indicates an association between inhalation exposures to nickel refinery dust containing soluble nickel com...

Journal: :Molecular microbiology 2006
Bo-Eun Ahn Joonseok Cha Eun-Jin Lee Ah-Reum Han Charles J Thompson Jung-Hye Roe

Nickel serves as a cofactor for various microbial enzymes including superoxide dismutase (SOD) found in Streptomyces spp. In Streptomyces coelicolor, nickel represses and induces production of Fe-containing and Ni-containing SODs, respectively, primarily at the transcriptional level. We identified the nickel-responsive regulator (Nur), a Fur (ferric-uptake regulator) homologue, which binds to t...

Journal: :Geologica Acta 2023

The mantle rocks from Kadaboura and Madara areas represent sections of dismembered ophiolitic complexes developed during the Neoproterozoic in Eastern Desert Egypt, which is located northwestern corner Arabian–Nubian Shield. comprise serpentinites serpentinized dunites, whereas those consist pyroxenites.Despite serpentinization studied rocks, few relicts primary chromite, olivine pyroxene are p...

2009
Gavin M. Mudd

There are widespread nickel resources around the world, but divided principally between nickel sulfide or laterite (oxide) resources. Historically production has been dominated by sulfide ores but future production is increasing shifting to laterite ores. The principal reason for this historically is that sulfide ores are easier to process, through conventional mining, smelting and refining, co...

2006
DANIEL B. MENZEL Harry Hines

SAITO, K. and MENZEL, D.B. Accumulation and Efflux of Nickel from Cultured Pneumocytes. Tohoku J. exp. Med., 1986, 148 (3), 295-302 The accumulation and efflux of nickel from three kinds of cultured pneumocytes were studied. Nickel rapidly penetrated the cells examined. The concentration of nickel in the cells was related to the volum of cytoplasm and surface area of the cells. Some metabolic i...

Journal: :European journal of orthodontics 2006
Ronny Fors Maurits Persson

The aim of this study was to compare the content of nickel in the saliva and dental biofilm in young patients with and without orthodontic appliances. The possible influence of a dietary intake of nickel on recorded nickel levels was examined. Nickel content in unstimulated whole saliva and in dental plaque of 24 boys and girls (mean age 14.8 years) with intraoral fixed orthodontic appliances w...

2017

Synonyms, trade names, and molecular formulae for nickel, nickel alloys, and selected nickel compounds are presented in Table 1.1. This list is not exhaustive, nor does it necessarily reflect the commercial importance of the various nickel-containing substances, but it is indicative of the range of nickel alloys and compounds available, including some compounds that are important commercially, ...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید