Results 71 to 80 of about 36,451 (292)

Advancements in Graphdiyne‐Based Multiscale Catalysts for Green Hydrogen Energy Conversion

Advanced Intelligent Discovery, EarlyView.
This review systematically explores the fundamental characteristics of graphdiyne (GDY), cutting‐edge field of GDY‐based multiscale catalysts within sustainable energy conversion systems.Special emphasis is placed on the structure‒property relationships in different reactions.
Qian Xiao, Lu Qi, Siao Chen, Yurui Xue
wiley   +1 more source

Calibration and Detection of Phosphine Using a Corrosion-Resistant Ion Trap Mass Spectrometer

Biophysica
We present a corrosion-resistant quadrupole ion trap mass spectrometer (QIT-MS) designed for trace detection of volatiles in sulfuric acid aerosols, with a specific focus on phosphine (PH3).
Dragan Nikolić, Xu Zhang
doaj   +1 more source

An optimized method for extraction and purification of inorganic phosphate from plant material for oxygen isotope ratio analysis

MethodsX
Compound-specific stable isotope ratio analysis of oxygen isotopes in inorganic phosphate can be used to study biological phosphorus cycling and the transformation processes controlling the fate of phosphorus. However, methods for extraction of inorganic
Maria Monrad Rieckmann, Ruth Elaine Blake, Sae Jung Chang, Kristian Holst Laursen   +3 more
doaj   +1 more source

Box Models of Volatile Cycles over the Entire Phanerozoic [PDF]

, 2006
Three stand-alone geochemical box models have been developed to simulate globally coupled biogeochemical cycles. These models reflect the evolution of the participating biotic and abiotic constituents in marine and terrestrial environments, including the
Bartdorff, Oliver
core  

Ediacara biota flourished in oligotrophic and bacterially dominated marine environments across Baltica. [PDF]

, 2018
Middle-to-late Ediacaran (575-541 Ma) marine sedimentary rocks record the first appearance of macroscopic, multicellular body fossils, yet little is known about the environments and food sources that sustained this enigmatic fauna.
Bekker, Andrey, Junium, Christopher K, Kuznetsov, Anton, Love, Gordon D, Pehr, Kelden, Podkovyrov, Victor, Shumlyanskyy, Leonid, Sokur, Tetyana   +7 more
core   +3 more sources

The Monterey event in the Mediterranean: A record from shelf sediments of Malta [PDF]

, 1996
Oligo-Miocene carbonate platform and shelf sediments outcropping on the Maltese Islands provide an excellent archive of the paleoceanography of the central Mediterranean.
Jacobs, E, Shields, G, Stille, P, Weissert, H   +3 more
core   +1 more source

Improvements in the preparation of phosphate for oxygen isotope analysis from soils and sediments. [PDF]

PLoS ONE, 2018
In contrast to the successful preparation of phosphate for oxygen isotope analysis from water samples, there are still a series of problems for similar analyses from soils and sediments.
Zifu Xu, Tao Huang, Xijie Yin
doaj   +1 more source

Galactic chemical abundance evolution in the solar neighborhood up to the Iron peak

, 2000
We have developed a detailed standard chemical evolution model to study the evolution of all the chemical elements up to the iron peak in the solar vicinity.
A. Alibés, Abia, Anders, Barbuy, Barbuy, Barbuy, Barbuy, Berczik, Boesgaard, Boissier, Burkert, Buser, Carbon, Carigi, Carretta, Chang, Charbonnel, Chen, Chiappini, Chiappini, Chiappini, Clegg, Dopita, Edmunds, Edvardsson, Forestini, François, François, Garnett, Gay, Gilmore, Giovanoli, Goswami, Gratton, Gratton, Gratton, Gratton, Gratton, Gratton, Greggio, Güsten, Hartmann, Hatano, Heger, Henry, Iben, Israelian, Iwamoto, J. Labay, Jorissen, José, Jørgensen, Kennicutt, Kroupa, Kuijken, Laird, Lambert, Larson, Limongi, Luck, Magain, Magain, Marigo, Massey, Matteucci, Matteucci, McWilliam, McWilliam, Meusinger, Meynet, Mirabel, Mirabel, Mishenina, Méra, Nissen, Nissen, Nomoto, Peterson, Peterson, Portinari, Portinari, Prantzos, Prantzos, Press, R. Canal, Rana, Reid, Reid, Renzini, Robin, Rocha-Pinto, Rocha-Pinto, Romano, Ryan, Ryder, Sackett, Salpeter, Samland, Samland, Scalo, Schaller, Schmidt, Shigeyama, Sneden, Sneden, Sneden, Steinmetz, Stephens, Talbot, Tamman, Thielemann, Thomas, Timmes, Tinsley, Tomkin, Tosi, Twarog, van den Hoek, Wheeler, Woosley, Woosley, Zhao   +121 more
core   +1 more source

A Novel Bis(phosphido)pyridine [PNP]^(2−) Pincer Ligand and Its Potassium and Bis(dimethylamido)zirconium(IV) Complexes [PDF]

, 2010
A novel PNP bis(secondary phosphine)pyridine pincer ligand, 2,6-bis(2-(phenylphosphino)phenyl)pyridine, has been prepared in high yield, and the properties of the doubly deprotonated form as a ligand in K_4(PNP)_2(THF)_6 and (PNP)Zr(NMe_2)_2 have been ...
Bercaw, John E., Winston, Matthew S.
core   +2 more sources

Mechanistic elucidation of HFIP‐enabled C–Cl bond activation in the synthesis of tetrahydroquinoline derivatives

Bulletin of the Korean Chemical Society, EarlyView.
Mechanistic studies reveal that hexafluoroisopropanol (HFIP) enables C–Cl activation of propargylic halides by stabilizing ion pairs and enhancing effective Brønsted acidity. This cooperative solvent effect allows access to cationic intermediates and promotes cascade formation of tetrahydroquinolines through cyclization and disproportionation ...
Seung Hoon Lee, Hyung Min Chi
wiley   +1 more source