Results 11 to 20 of about 487,676 (263)

Chemodivergent transformations of amides using gem-diborylalkanes as pro-nucleophiles

Nature Communications, 2020
Amides are versatile synthetic building blocks, however the general stability of the amide bond makes its selective transformation challenging. Here, the authors report a chemodivergent transformation of primary, secondary and tertiary amides by using 1 ...
Wei Sun, Lu Wang, Yue Hu, Xudong Wu, Chungu Xia, Chao Liu   +5 more
doaj   +1 more source

Sequential Extraction Analysis of Arsenic in Soil Samples Collected in an Agricultural Area of Brindisi, Apulia (Italy), in the Proximity of a Coal-Burning Power Plant

Applied Sciences, 2021
In order to evaluate the local environmental risk deriving from coal transport and burning, 30 soil samples were collected along the coal conveyor belt and around the coal-burning power plant Federico II of Brindisi (Apulia, southern Italy).
Danilo Migoni, Paride Papadia, Francesco Cannito, Francesco Paolo Fanizzi   +3 more
doaj   +1 more source

Community- and genome-based evidence for a shaping influence of redox potential on bacterial protein evolution

mSystems, 2023
Despite deep interest in how environments shape microbial communities, whether redox conditions influence the sequence composition of genomes is not well known.
Jeffrey M. Dick, Delong Meng
doaj   +1 more source

Effect of Water Chemistry on Zeta Potential of Air Bubbles

International Journal of Electrochemical Science, 2013
Effects of various factors on zeta potential of air bubbles in aqueous solution were studied. It was found that the water pH, surfactants types and concentration, and water temperature had significant roles on the zeta potential of air bubbles.
Weihong Jia, Sili Ren, Bin Hu
doaj   +1 more source

Effect of doping TiO2 with alkaline-earth metal ions on its photocatalytic activity [PDF]

Journal of the Serbian Chemical Society, 2007
TiO2 photocatalysts doped with alkaline-earth metal ions were prepared by the impregnation and coprecipitation methods. The sample were characterized by XRD, XPS and IR spectroscopy.
Li Yuexiang, Peng Shaoqin, Jiang Fengyi, Lu Gongxuan, Li Shuben   +4 more
doaj   +1 more source

Local Structure and Magnetism of LiFeSi0.01P0.99O4/C as a Cathode Material on Lithium-Ion Battery

Journal of Magnetism and Its Applications, 2021
The oxidation state and local structure of LiFeSi0.01P0.99O4/C composites as a cathode on lithium-ion battery were investigated by Fe K-edge X-ray Absorption Near Edge Spectroscopy (XANES) and Extended X-ray Absorption Fine Structure (EXAFS). The LiFeSi0.
Vera Laviara Maghfirohtuzzoimah, Sahara Hamas Intifadhah, Pelangi Az-zahra, Wantana Klysubun, Dita Puspita Sari, Isao Watanabe, Mochamad Zainuri, Fahmi Astuti   +7 more
doaj   +1 more source

The dⁿ Number in Transition Metal Chemistry: Its Utility and Limitations

Chemistry, 2023
The dn number or configuration is a very useful parameter in transition metal chemistry because it conveys information about the expected properties of a d-block metal complex, including its shape, magnetism, thermodynamic stability, kinetic lability ...
Nicholas C. Norman, Paul G. Pringle
doaj   +1 more source

The charge percolation mechanism and simulation of Ziegler–Natta polymerizations Part III. Oxidation states of transition metals [PDF]

Journal of the Serbian Chemical Society, 2006
The oxidation state of the transition metal (Mt) active centre is the most disputable question in the polymerization of olefins by Ziegler–Natta (ZN) and metallocene complexes.
BRANKA PILIC, DRAGOSLAV STOILJKOVIC, IVANA BAKOCEVIC, SLOBODAN JOVANOVIC, DAVOR PANIC, LJILJANA KORUGIC-KARASZ   +5 more
doaj   +3 more sources

Active catalyst construction for CO2 recycling via catalytic synthesis of N-doped carbon on supported Cu

Nature Communications, 2019
Bridging homogeneous and heterogeneous catalysis is a long-term pursuit in the field of catalysis. Here, the authors present results on integration of nano- and molecular catalysis via catalytic synthesis of nitrogen doped carbon layers on AlOx supported
Yajuan Wu, Tao Wang, Hongli Wang, Xinzhi Wang, Xingchao Dai, Feng Shi   +5 more
doaj   +1 more source

Oxidation state analysis of LiFeSixP1-xO4/C (x = 0.06) with X-ray absorption near edge structure (XANES) in Fe K-edge and Si K-edge

Journal of Physics: Theories and Applications, 2021
The development of LiFePO4 as a cathode materials on lithium-ion battery was increased with the use of additional techniques such as atomic doping and coating.
Sahara Hamas Intifadhah, Vera Laviara Maghfirohtuzzoimah, Pelangi Az-zahra, Wantana Klysubun, Fahmi Astuti, Mochamad Zainuri, Darminto Darminto   +6 more
doaj   +1 more source