Results 21 to 30 of about 10,014,931 (288)

Molecular probe dynamics reveals suppression of ice-like regions in strongly confined supercooled water. [PDF]

open access: yesPLoS ONE, 2012
The structure of the hydrogen bond network is a key element for understanding water's thermodynamic and kinetic anomalies. While ambient water is strongly believed to be a uniform, continuous hydrogen-bonded liquid, there is growing consensus that ...
Debamalya Banerjee   +3 more
doaj   +1 more source

Protonation Equilibrium in the Active Site of the Photoactive Yellow Protein

open access: yesMolecules, 2021
The role and existence of low-barrier hydrogen bonds (LBHBs) in enzymatic and protein activity has been largely debated. An interesting case is that of the photoactive yellow protein (PYP).
Pablo Campomanes, Stefano Vanni
doaj   +1 more source

On the electronic nature of low-barrier hydrogen bonds in enzymatic reactions [PDF]

open access: yesProceedings of the National Academy of Sciences, 1998
The electronic nature of low-barrier hydrogen bonds (LBHBs) in enzymatic reactions is discussed based on combined low temperature neutron and x-ray diffraction experiments and on high level ab initio calculations by using the model substrate benzoylacetone.
Schiøtt, Birgit; id_orcid 0000-0001-9937-1562   +4 more
openaire   +3 more sources

Hydrophobic Molecules Slow Down the Hydrogen-Bond Dynamics of Water [PDF]

open access: yes, 2011
We study the spectral and orientational dynamics of HDO molecules in solutions of tertiary-butyl-alcohol (TBA), trimethyl-amine-oxide (TMAO), and tetramethylurea (TMU) in isotopically diluted water (HDO:D2O and HDO:H2O). The spectral dynamics are studied
Bakulin, Artem A.   +15 more
core   +3 more sources

Intramolecular OHO Hydrogen Bonding in Dibenzoylmethane Enol: Raman Spectroscopic and Quantum Chemical Study

open access: yesMicro, 2023
In the present work, the intramolecular O-H···O hydrogen bonding in 3-hydroxy-1,3-diphenylprop-2-en-1-one (keto-enol form of dibenzoylmethane, DBM) was investigated.
Boris A. Kolesov   +2 more
doaj   +1 more source

Low-barrier hydrogen bonds in enzyme cooperativity

open access: yesNature, 2019
The underlying molecular mechanisms of cooperativity and allosteric regulation are well understood for many proteins, with haemoglobin and aspartate transcarbamoylase serving as prototypical examples1,2. The binding of effectors typically causes a structural transition of the protein that is propagated through signalling pathways to remote sites and ...
Dai, Shao-Bo   +8 more
openaire   +4 more sources

Low-Voltage Hydrogen Peroxide Electrolyzer for Highly Efficient Power-to-Hydrogen Conversion [PDF]

open access: yes, 2021
Power-to-hydrogen conversion in a proton exchange membrane (PEM) water electrolyzer requires costly iridium-based catalysts and high voltage to overcome the energy barrier of the oxygen evolution reaction.
Jie, Yang   +6 more
core   +2 more sources

Proton-mediated photoprotection mechanism in photosystem II

open access: yesFrontiers in Plant Science, 2022
Photo-induced charge separation, which is terminated by electron transfer from the primary quinone QA to the secondary quinone QB, provides the driving force for O2 evolution in photosystem II (PSII).
Yu Sugo   +2 more
doaj   +1 more source

Hydrogen-Bond-Promoted ORR Mechanism in P‑Doped Fe–N–C Materials

open access: yes, 2023
P-doping has been widely adopted in M–N–C materials to enhance the catalytic activity of oxygen reduction reaction (ORR). However, the ORR mechanism of P-doping remains elusive. Herein, based on the first-principles calculations, the stability of P-doped
Naiqin Zhao (1410178)   +7 more
core   +1 more source

Expression, purification and characterization of the HIV-1 coreceptor CCR5 and its ligand RANTES and high-pressure NMR investigation of hydrogen bonds in biomolecules [PDF]

open access: yes, 2010
Nuclear magnetic resonance spectroscopy is a very versatile technique for the investigation of biomolecular structures and dynamics. In this thesis, solution and solid state NMR methods have been applied to study a membrane protein and its interactions ...
Nisius, Lydia
core   +1 more source

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