Results 41 to 50 of about 3,073,614 (389)

Theoretical Study of Heteroatom Resonance-Assisted Hydrogen Bond: Effect of Substituent on π-delocalization [PDF]

Iranian Journal of Chemistry & Chemical Engineering, 2010
The concept of Resonance Assisted Hydrogen Bond (RAHB), which usually occurs in b diketons, has a remarkable role in chemistry. These molecules, which contain heteroatom particularly O and N, are species with biological interest in protein folding and ...
Ali Heydar Pakiari, Maryam Farrokhnia
doaj  

Bis(dimethylammonium) 2,5-dihydroxybenzene-1,4-disulfonate

Acta Crystallographica Section E, 2012
In the crystal of the title salt, 2C2H8N+·C6H4O8S22−, the anion lies on a center of inversion. The dimethylammonium cation forms one N—H...O hydrogen bond and another bifurcated N—H...O hydrogen bond.
Shan Gao, Seik Weng Ng
doaj   +1 more source

Reactivity of a trans-[H-Mo≣Mo-H] Unit Towards Alkenes and Alkynes. Bimetallic Migratory Insertion, H-Elimination and Other Reactions [PDF]

, 2018
Complex [Mo2(H)2{μ-HC(NDipp)2}2(THF)2], (1·THF), reacts with C2H4 and PhCH[double bond, length as m-dash]CH2 to afford hydrido-hydrocarbyl and bis(hydrocarbyl) derivatives of the Mo[quadruple bond, length as m-dash]Mo bond. Reversible migratory insertion
Campos Manzano, Jesús, Carmona Guzmán, Ernesto, López Serrano, Joaquín, Pérez Jiménez, Marina   +3 more
core   +1 more source

(E)-4-Hydroxy-N′-(2-hydroxy-4-methoxybenzylidene)benzohydrazide monohydrate

Acta Crystallographica Section E, 2009
The Schiff base molecule of the title compound, C15H14N2O4·H2O, adopts a trans configuration with respect to the C=N double bond; the Schiff base itself is almost planar (r.m.s. deviation for all non-H atoms = 0.040 Å).
Nooraziah Mohd Lair, Hapipah Mohd Ali, Seik Weng Ng   +2 more
doaj   +1 more source

Identification of the protonation and oxidation states of the oxygen-evolving complex in the low-dose X-ray crystal structure of photosystem II

Frontiers in Plant Science, 2023
In photosystem II (PSII), the O3 and O4 sites of the Mn4CaO5 cluster form hydrogen bonds with D1-His337 and a water molecule (W539), respectively. The low-dose X-ray structure shows that these hydrogen bond distances differ between the two homogeneous ...
Keisuke Saito, Keisuke Saito, Shu Nakao, Hiroshi Ishikita, Hiroshi Ishikita   +4 more
doaj   +1 more source

Raman Spectroscopic and SEM Analysis of Sodium-Zippeite [PDF]

, 2007
Raman at 298 and 77 K and infrared spectra of two samples of sodium-zippeite were studied and interpreted. U-O bond lengths in uranyl were calculated and compared with those inferred from the X-ray single crystal structure data of a synthetic sodium ...
Anderson, Bartlett, Burns, Burns, Burns, Burns, Cejka, Cejka, Elton, Finch, Frondel, Frondel, Frondel, Frost, Frost, Frost, Frost, Frost, Frost, Frost, Frost, Frost, Frost, Frost, Frost, Frost, Frost, Frost, Gaines, Haacke, Hawthorne, Hawthorne, Hawthorne, Hawthorne, Hoekstra, Libowitzky, McCollam, Meisser, O'Brien, Ondrus, Paulis, Sejkora, Serezhkin, Volod'ko   +43 more
core   +2 more sources

Biophysical analysis of angiotensin II and amyloid‐β cross‐interaction in aggregation and membrane disruption

FEBS Letters, EarlyView.
Angiotensin II (AngII), a neuropeptide, interacts with amyloid‐β (Aβ), a key player in Alzheimer's disease. This study reveals that AngII reduces Aβ aggregation and membrane disruption in vitro. Biophysical assays and molecular modeling suggest AngII binds disordered Aβ forms, potentially modulating early amyloidogenic events and contributing to ...
Mohsen Habibnia, Eric Catalina‐Hernandez, Maialen Cabrerizo‐Idiazabal, Ramon Barnadas‐Rodríguez, Mario Lopez‐Martin, Alex Peralvarez‐Marin   +5 more
wiley   +1 more source

2-[(4-Methylbenzoyl)hydrazono]propionic acid monohydrate

Acta Crystallographica Section E, 2009
In the title compound, C11H12N2O3·H2O, the water molecule is a hydrogen-bond donor to the double-bond amide and the carbonyl O atoms of two acid molecules; it is also a hydrogen-bond acceptor to the acid –OH and amide –NH– groups ...
Seik Weng Ng, Kong Mun Lo, Hon Wee Wong
doaj   +1 more source

Discrete kink dynamics in hydrogen-bonded chains I: The one-component model [PDF]

, 2002
We study topological solitary waves (kinks and antikinks) in a nonlinear one-dimensional Klein-Gordon chain with the on-site potential of a double-Morse type. This chain is used to describe the collective proton dynamics in quasi-one-dimensional networks
A. Godzik, A. V. Zolotaryuk, A.V. Savin, A.V. Savin, A.V. Zolotaryuk, A.V. Zolotaryuk, Chung-I Chou, D.B. Duncan, E.S. Kryachko, E.S. Kryachko, E.S. Kryachko, J.C. Eilbeck, J.F. Nagle, J.H. Weiner, J.L. Marín, J.M. Speight, J.M. Speight, M. Büttiker, M. Büttiker, M. Peyrard, M. Peyrard, M.H. Jensen, N.J. Balmforth, O.M. Braun, O.M. Braun, P. L. Christiansen, R. Grauer, S. Flach, S. Pnevmatikos, S. Pnevmatikos, S. Scheiner, S.F. Mingaleev, V. M. Karpan, V.H. Schmidt, X. Duan, Y. Kashimori, Y. Zolotaryuk, Y. Zolotaryuk, Y.P. Mei, Y.S. Kivshar   +39 more
core   +2 more sources

Photosynthesis under far‐red light—evolutionary adaptations and bioengineering of light‐harvesting complexes

FEBS Letters, EarlyView.
Phototrophs evolved light‐harvesting systems adapted for efficient photon capture in habitats enriched in far‐red radiation. A subset of eukaryotic pigment‐binding proteins can absorb far‐red photons via low‐energy chlorophyll states known as red forms.
Antonello Amelii, Edoardo Andrea Cutolo, Daniele Montepietra, Claudia Battarra, Roberto Caferri, Stefano Capaldi, Zeno Guardini, Luca Dall'Osto, Roberto Bassi   +8 more
wiley   +1 more source