Results 91 to 100 of about 1,079 (210)

Analysis of Minerals Using Handheld Laser-Induced Breakdown Spectroscopy Technology

open access: yesData
Laser-induced breakdown spectroscopy (LIBS), a rapid and versatile analytical technique, is becoming increasingly widespread within the geoscience community.
Naila Mezoued   +4 more
doaj   +1 more source

INVESTIGATION OF REMOVING Cr(VI) IONS FROM AQUEOUS SOLUTIONS BY USING WASTE MATERIALS AS ADSORBENT [PDF]

open access: yes, 2013
In the chemistry course of national program our teacher has talked about the pollution problems related to our environment. Subject attracted my interest since all of us should be sensitive for a clean environment and to leave a clean world to the ...
Öktem, Gülce
core  

Oxygen Vacancy Formation and Defect Structure of Cu-doped Lanthanum Chromite LaCr0.79Cu0.05Al

open access: yes, 2005
The results of oxygen nonstoichiometry are presented for the chromite LaCr0.79Cu0.05Al0.16O3-delta with hexagonal perovskite structure at 1000 degreesC. The modeling of the defect structure of this oxygen deficient chromite is carried out by considering ...
Hilpert, K., Zuev, A., Singheiser, L.
core   +1 more source

XPS study on barium-promoted copper chromite catalysts

open access: yes, 1992
Copper chromite catalysts are used nowadays in catalytic reactions during the incineration of organic air pollutants, which is a subject of growing interest in environmental safety.
C.L. Bianchi, V. Ragaini, M. G. Cattania
core  

Microporous copper chromite thick film based novel and ultrasensitive capacitive humidity sensor

open access: yes, 2021
In this paper we report to have developed a microporous Copper Chromite (CuCr2O4) thick film based capacitive humidity sensor that exhibits excellent response in the range of 1%-98% RH at room temperature.
Mondal, Partha Pratim   +5 more
core  

Kinetics of hydrogenation of furfural to furfuryl alcohol over copper chromite catalyst and optimum regeneration procedures

open access: yes, 1996
The deactivation mechanism of a copper chromite catalyst, used in selective hydrogenation of furfural to furfuryl alcohol, was investigated and the methods to regenerate it were searched.
Doğu, Timur, Soner, E, Yorulmaz, Y
core   +1 more source

Selective synthesis of isobutanol by means of the Guerbet reaction. Part 2. Reaction of methanol/ethanol and methanol/n-propanol mixtures over copper based/MeONa catalytic systems

open access: yes, 2003
The synthesis of isobutanol via the Guerbet condensation between methanol and ethanol was studied by using sodium methoxide (MeONa) as soluble basic component and copper-based catalysts as heterogeneous dehydrogenating/hydrogenating metal species.
SBRANA, GLAUCO   +7 more
core   +1 more source

Risk assessment of potential impact of mining development (linear infrastructure) on peatland ecosystems in the Ring of Fire region, Northern Ontario

open access: yesFrontiers in Environmental Science
The Ring of Fire (RoF) region in northeastern Ontario, Canada, is an emerging mining frontier rich in critical minerals including nickel, chromite, and copper. The RoF lies within Treaty No.
Anna Dabros   +6 more
doaj   +1 more source

Water: Friend or Foe in Catalytic Hydrogenation? A Case Study Using Copper Catalysts

open access: yes, 2018
Copper oxide supported on alumina and copper chromite were synthesized, characterized, and subsequently tested for their catalytic activity toward the hydrogenation of octanal. Thereafter, the impact of water addition on the conversion and selectivity of
Alisa Govender   +2 more
core   +1 more source

The metallogenic evolution of the Greater Antilles

open access: yesGeologica Acta, 2011
The Greater Antilles host some of the world’s most important deposits of bauxite and lateritic nickel as well as significant resources of gold and silver, copper, zinc, manganese, cobalt and chromium.
C.E. NELSON   +3 more
doaj  

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