Results 181 to 190 of about 13,651 (294)

Selective Formation of a 1,2‐Diborane(4) and Alcohol‐Driven B─B Bond Cleavage to Generate H2

Chemistry – A European Journal, EarlyView.
Diborane(4) chemistry reveals unusual reactivity of electron‐deficient p‐block compounds. Reaction of B2Cat2 (Cat = benzene‐1,2‐diolate) with mesityllithium (MesLi; Mes = 2,4,6‐trimethylphenyl) gives a rare 1,2‐diborane(4) featuring a catecholate ligand. Alcoholysis cleaves the B─B bond and ultimately generates H2.
Rayni P. Noriega, David J. Nelson, Marcus W. Drover   +2 more
wiley   +1 more source

Geographical traceability of bacteria based on a systematic stable isotope analysis method. [PDF]

Appl Microbiol Biotechnol
Wang W, Zhao B, Cai Z, Jie Z, Feng L, Hu C, Guo H, Li Y, Deng X, Zhu J, Mei H, Ye J.   +11 more
europepmc   +1 more source

Total Synthesis and Absolute Configuration of the Irregular Tetraterpene Viaticene A

Chemistry – A European Journal, EarlyView.
Viaticenes are tetraterpenes with a unique [6+2]‐connectivity from the springtail Hypogastrura viatica. Here, we report a modular 13‐step total synthesis of viaticene A, featuring stereoselective double‐bond formation, a Cu‐mediated allylic substitution, and Ni/Co‐cocatalyzed vinyl‐alkyl cross‐electrophile coupling as key steps.
Patrick Stamm, Ozan Solak, Johanna Kuhn, Stefan Schulz   +3 more
wiley   +1 more source

Mass-independent oxygen isotope fractionation driven by energetic-particle irradiation of icy solids. [PDF]

Proc Natl Acad Sci U S A
Dominguez G, Caplan C, Tafla L, Lucas J, Liu MC, McKeegan K, Gillis J.   +6 more
europepmc   +1 more source

Experimental methods in chemical engineering: Temperature‐programmed desorption—TPD

The Canadian Journal of Chemical Engineering, EarlyView.
Abstract Temperature‐programmed desorption (TPD) characterizes the surface active sites of functional materials, such as adsorbents (metal hydrides, porous carbons, zeolites, metal–organic frameworks, for example) and catalysts. Solids surfaces are pre‐treated to remove moisture, contaminants, and previously adsorbed species, then a probe molecule (NH3$
Daniel A. Valdivieso‐Vera, Gregory S. Patience, M. Olga Guerrero‐Pérez   +2 more
wiley   +1 more source

Deer Antler δ¹⁸O Records Desalination in Israel's Water Supply. [PDF]

Rapid Commun Mass Spectrom
Laposki C, Darcy A, Werner N, Hartman G.
europepmc   +1 more source

Advantages of Pulsed Laser Ion Source (LIS) at an Intensity of About 1010 W/cm2 for Heavy‐Ion Injection Into High‐Energy Accelerators

Contributions to Plasma Physics, EarlyView.
ABSTRACT At the Laser Plasma Physics laboratories of the University of Messina, an experimental platform for generating and accelerating low‐energy ions (keV) using pulsed lasers and for their potential applications has been put into operation. A Q‐switched Nd:YAG laser produces the beam for the system, operating at 1064 nm.
L. Torrisi, M. Cutroneo, A. Torrisi
wiley   +1 more source

Hydrochemical Evolution and Isotopic Identification of Groundwater Contamination in a Typical Abandoned Pyrite Mining Area: A Case Study of the Jinpen Mining Area in Yunxi County. [PDF]

Water Environ Res
Du B, Su H, Shi Y, Zhou P.
europepmc   +1 more source

Polyoxometalates in Photocatalytic CO2 Reduction: Multielectron Redox Regulation Across Molecular and Hybrid Architectures

EcoEnergy, EarlyView.
This review focuses on multielectron redox regulation across molecular and hybrid architectures for photocatalytic CO2 reduction, covering intrinsic POM photocatalysts, photosensitizer‐assisted assemblies, POM–metal–organic complexes, and POM‐integrated semiconductors and MOF/COF heterostructures to link structural motifs with charge transport, product
Bonan Li, Xiaowen Ruan, Sai Kishore Ravi
wiley   +1 more source

Thallium Isotopes Across the Smithian-Spathian Boundary: Evidence for Anoxia Throughout Most of the Early Triassic. [PDF]

Geobiology
Newby SM, Owens JD, Young SA, Hammer Ø.
europepmc   +1 more source