Agenparl

proton

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RUSSIA LAUNCHES PROTON ROCKET CARRYING TWO COMSATS

Redazione
(AGENPARL) – RESTON (VIRGINIA), lun 03 agosto 2020  News about the aerospace industry curated by AIAA staff Russia Launches Proton Rocket Carrying Two Comsats Jul 31, 2020, 11:13 AM by Lawrence Garrett A Russian Proton Rocket Launches. | NASA Aviation International News reports that Boom Supersonic and Rolls-Royce “have entered into......
Agenparl English Educazione Scienza e Tecnologia Social Network

EFFECT OF METALLACARBORANE SALT H[COSANE] DOPING ON THE PERFORMANCE PROPERTIES OF POLYBENZIMIDAZOLE MEMBRANES FOR HIGH TEMPERATURE PEMFCS

Redazione
(AGENPARL) – LONDON (UNITED KINGDOM), ven 31 luglio 2020 In this paper, a series of composite proton exchange membranes comprising a cobaltacarborane protonated H[Co(C2B9H11)2] named (H[COSANE]) and polybenzimidazole (PBI) for a high temperature proton exchange membrane fuel cell (PEMFC) is reported, with the aim of enhancing the proton conductivity of......
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PHOTOISOMERIZATION OF AZOBENZENE UNITS DRIVES THE PHOTOCHEMICAL REACTION CYCLES OF PROTEORHODOPSIN AND BACTERIORHODOPSIN ANALOGUES

Redazione
(AGENPARL) – LONDON (UNITED KINGDOM), mer 29 luglio 2020 In this study we substituted the retinal units in proteorhodopsin (PR) and bacteriorhodopsin (BR) with azo chromophores to investigate the mechanism of photoinduced proton pumping in rhodopsins and potentially develop new artificial molecular pumps. We used an indium tin oxide electrode......
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HIGHLY SELECTIVE SENSING OF FE3+/HG2+ AND PROTON CONDUCTION USING TWO FLUORESCENT ZN(II) COORDINATION POLYMERS

Redazione
(AGENPARL) – LONDON (UNITED KINGDOM), ven 17 luglio 2020 A pair of homologues, [Zn(Hssa)(1,4-bib)·H2O]n (1) and [Zn3(ssa)2(1,4-bib)3·4H2O]n (2), were successfully assembled using the same metals and ligands [H3ssa = 5-sulfosalicylic acid; 1,4-bib =1,4-bis(1H-imidazol-1-yl)benzene] under solvothermal conditions. Polymer 1 is a two-dimensional (2D) sql network and polymer 2 is a three-dimensional......
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DECIPHERING THE EXCITED STATE INTRAMOLECULAR CHARGE-COUPLED DOUBLE PROTON TRANSFER IN AN ASYMMETRIC QUINOLINE-BENZIMIDAZOLE SYSTEM

Redazione
(AGENPARL) – LONDON (UNITED KINGDOM), lun 13 luglio 2020 8-(1H-Benzo[d]imidazol-2-yl) quinolin-7-ol (HQB) has structural asymmetry and encloses double hydrogen bonds (HBs), which undergo excited state intramolecular charge transfer and double proton transfer (ESICT/ESIDPT). The HQB exhibits three absorption peaks at 360 nm, 315 nm, and 305 nm. On photoexcitation, HQB......
Agenparl English Ambiente Educazione Scienza e Tecnologia Social Network

TEAMS WEBINAR: STRUCTURAL ANALYSES OF THE 2 MW MERCURY TARGET FOR THE PROTON POWER UPGRADE PROJECT

Redazione
(AGENPARL) – OAK RIDGE, TENNESSEE, (USA), ven 10 luglio 2020 Teams Webinar: Structural Analyses of the 2 MW Mercury Target for the Proton Power Upgrade Project Abstract The Spallation Neutron Source (SNS), located at ORNL, is designed to provide a steady source of neutrons for a number of instruments in order......
Agenparl English Educazione Scienza e Tecnologia Social Network

DETERMINANTS FOR PROTON LOCATION AND ELECTRON COUPLED PROTON TRANSFER IN HYDROGEN BONDED PENTAFLUOROPHENOL-ANION CLUSTERS

Redazione
(AGENPARL) – LONDON (UNITED KINGDOM), lun 06 luglio 2020 This work reveals the determinant factors for proton locations and electron coupled proton transfer (ECPT) in biologically relevant hydrogen bonded systems. Pentafluorophenol-anion clusters [C6F5O−•H+•A−]− are chosen to model active sites of biological functions, with the anion A− being systematically varied to......
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RIGIDLY HYDROGEN-BONDED WATER MOLECULES FACILITATE PROTON TRANSFER IN PHOTOSYSTEM II

Redazione
(AGENPARL) – LONDON (UNITED KINGDOM), gio 02 luglio 2020 In the water-splitting enzyme photosystem II (PSII), the proton is released from the catalytic site and transferred to the protein bulk surface via the proton-relay mechanism. Proton transfer occurs in a proton-conducting channel consisting of a series of water molecules connected......
Agenparl English Educazione Scienza e Tecnologia Social Network

COMPUTATIONAL STUDY ON NHC CATALYZED [4 + 2] ANNULATION BETWEEN γ-CHLOROENALS AND PYRAZOLINONES: MECHANISM AND STEREOSELECTIVITY

Redazione
(AGENPARL) – LONDON (UNITED KINGDOM), ven 19 giugno 2020 We present a computational study on the mechanisms and stereoselectivities of the [4 + 2] annulation of an enal with a pyrazolinone catalyzed by N-heterocyclic carbene (NHC). The computational results show that the catalytic reaction proceeds via eight steps: nucleophilic addition......
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MASS SPECTROMETRY AND COMPUTATIONAL STUDY OF COLLISION-INDUCED DISSOCIATION OF 9-METHYLGUANINE—1-METHYLCYTOSINE BASE-PAIR RADICAL CATION: INTRA-BASE-PAIR PROTON TRANSFER AND HYDROGEN TRANSFER, NON-STATISTICAL DISSOCIATION, AND REACTION WITH A WATER LIGAND

Redazione
(AGENPARL) – LONDON (UNITED KINGDOM), gio 18 giugno 2020 A combined experimental and theoretical study is presented on the collision-induced dissociation (CID) of 9-methylguanine—1-methylcytosine base-pair radical cation (abbreviated as [9MG·1MC]•+) and its monohydrate ([9MG·1MC]•+·H2O) with Xe and Ar gases. Product ion mass spectra were measured as a function of collision......

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