Results 101 to 110 of about 514 (161)

Recommendation of occupational exposure limits (2025-2026). [PDF]

open access: yesEnviron Occup Health Pract
Japan Society for Occupational Health May 14   +1 more
europepmc   +1 more source

Recommendation of occupational exposure limits (2024-2025). [PDF]

open access: yesEnviron Occup Health Pract
Japan Society for Occupational Health May 22   +1 more
europepmc   +1 more source

Inhibitory effects of cupferron on the monophenolase and diphenolase activity of mushroom tyrosinase

open access: yesInternational Journal of Biochemistry and Cell Biology, 2003
Mushroom tyrosinase (EC 1.14.18.1) is a copper containing oxidase that catalyzes both the hydroxylation of tyrosine into o-diphenols and the oxidation of o-diphenols into o-quinones. In the present study, the kinetic assay was performed in air-saturated solutions and the kinetic behavior of this enzyme in the oxidation of L-tyrosine and L-DOPA has been
Qing-Xi Chen   +2 more
exaly   +5 more sources

Flotation and adsorption studies of chalcopyrite with cupferron [PDF]

open access: yesInternational Journal of Mineral Processing, 1982
Abstract Flotation tests were conducted in a Hallimond tube on chalcopyrite, with a collector system of cupferron and fuel oil. The reagent concentration, pH and conditioning time were studied as variables. The necessity of the fuel oil was verified by conducting experiments without it.
S. Prabhakar, P.R. Khangaonkar
openaire   +2 more sources

Catalytic polarographic wave in the vanadium–cupferron system

Journal of Electroanalytical Chemistry, 2015
Abstract Surface catalytic polarograpfic wave in vanadium(V)–cupferron system has been studied in the buffer media with pH 5 ÷ 7.5. The catalytic wave is observed at − 0.6 ÷ − 0.7 V (SCE), and it could be enhanced by addition of quaternary ammonium salts. This fact implies that catalytically active vanadium species are anionic.
Vladimir D Ivanov
exaly   +2 more sources

Flotation Separation of Smithsonite from Calcite Using Cupferron as a Collector

open access: yesMinerals (Basel, Switzerland), 2023
The flotation separation of smithsonite and calcite is difficult due to their similar surface properties. In this study, cupferron was applied as a collector to realize the separation of smithsonite and calcite.
Xin Wang   +7 more
exaly   +2 more sources

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