Results 21 to 30 of about 1,292,283 (312)
In situ benthic fluxes from an intermittently active mud volcano at the Costa Rica convergent margin [PDF]
, 2005 Along the erosive convergent margin off Costa Rica a large number of mound-shaped structures exist built by mud diapirism or mud volcanism. One of these, Mound 12, an intermittently active mud volcano, currently emits large amounts of aqueous dissolved ...
Hensen, Christian +4 more
core +1 more source
The catalytic oxidation of organic contaminants in a packed bed reactor [PDF]
, 1994 The catalytic oxidation of several hydrocarbons was studied over noble metal and metal oxide catalysts. A fast empirical method was developed to determine the minimum operating temperature required to guarantee complete conversion of the hydrocarbon.\ud \
Beld, L. van de +4 more
core +4 more sources
Nature of Pre-Earthquake Phenomena and their Effects on Living Organisms
Animals, 2013 Earthquakes occur when tectonic stresses build up deep in the Earth before catastrophic rupture. During the build-up of stress, processes that occur in the crustal rocks lead to the activation of highly mobile electronic charge carriers.
Friedemann Freund, Viktor Stolc
doaj +1 more source
Frontiers in Chemistry, 2019 A photoelectrochemical device was achieved by interfacial self-assembly of macrocyclic π-conjugated copper phthalocyanine (CuPc) on surface of TiO2 nanorod arrays (NRs). The photocurrent density of the elegant TiO2@CuPc NRs photoanode reaches 2.40 mA/cm2
Yuangang Li +10 more
doaj +1 more source
Nanomaterials, 2022 In this work, a highly efficient wide-visible-light-driven photoanode, namely, nitrogen and sulfur co-doped tungsten trioxide (S-N-WO3), was synthesized using tungstic acid (H2WO4) as W source and ammonium sulfide ((NH4)2S), which functioned ...
Dong Li +6 more
doaj +1 more source
Methane Oxidation to Methanol in Water [PDF]
Accounts of Chemical Research, 2021 Methane represents one of the most abundant carbon sources for fuel or chemical production. However, remote geographical locations and high transportation costs result in a substantial proportion being flared at the source. The selective oxidation of methane to methanol remains a grand challenge for catalytic chemistry due to the large energy barrier ...
Simon J. Freakley +5 more
openaire +2 more sources
Thinking twice about the evolution of photosynthesis [PDF]
Open Biology, 2019 Sam Granick opened his seminal 1957 paper titled ‘Speculations on the origins and evolution of photosynthesis’ with the assertion that there is a constant urge in human beings to seek beginnings (I concur).
Tanai Cardona
doaj +1 more source
Structure–Function Relationship within Cu-Peptoid Electrocatalysts for Water Oxidation
Inorganics, 2023 Water oxidation (WO) is the first step in the water-splitting process aiming at the production of hydrogen as a green renewable fuel. To successfully perform WO, potent strategies for overcoming the high energetic barrier and slow kinetics of this ...
Guilin Ruan +2 more
doaj +1 more source
Computational Modeling of Cobalt-Based Water Oxidation: Current Status and Future Challenges
Frontiers in Chemistry, 2018 A lot of effort is nowadays put into the development of novel water oxidation catalysts. In this context, mechanistic studies are crucial in order to elucidate the reaction mechanisms governing this complex process, new design paradigms and strategies ...
Mauro Schilling, Sandra Luber
doaj +1 more source
Water oxidation in photosystem II [PDF]
Photosynthesis Research, 2019 Biological water oxidation, performed by a single enzyme, photosystem II, is a central research topic not only in understanding the photosynthetic apparatus but also for the development of water splitting catalysts for technological applications.
Wolfgang Lubitz +2 more
openaire +3 more sources