Results 21 to 30 of about 272 (215)
Do Hydrogen Bonds Influence Excitonic Splittings?
CHIMIA, 2016 The excitonic splitting and vibronic quenching of the inversion-symmetric homodimers of benzonitrile, (BN)2, and meta-cyanophenol, (mCP)2, are investigated by two-color resonant two-photon ionization spectroscopy.
Franziska A. Balmer +2 more
doaj +1 more source
Hydrogen bond symmetrization and equation of state of phase D [PDF]
Journal of Geophysical Research, 2011 We have synthesized phase D at 24 GPa and at temperatures of 1250-1100 C in a multianvil press under conditions of high silica activity. The compressibility of this high-silica-activity phase D (Mg{sub 1.0}Si{sub 1.7}H{sub 3.0}O{sub 6}) has been measured up to 55.8 GPa at ambient temperature by powder X-ray diffraction.
Anwar Hushur +8 more
openaire +1 more source
Multivariate analysis of hydrophobic descriptors
ADMET and DMPK, 2014 Multivariate approaches like principal component analysis (PCA) are powerful tools to investigate hydrophobic descriptors and to discriminate between intrinsic hydrophobicity and polar contributions as hydrogen bonds and other electronic effects.
Stefan Dove
doaj +1 more source
Molecules, 2012 Symmetric and non-symmetric 2-(<em>N</em>-H, <em>N</em>-methyl, <em>N</em>-ethylenyl and <em>N</em>-aryl)guanidinebenzothiazoles were synthesized from the reaction of ammonia, methylamine, pyrrolidine and ...
Efrén V. García-Báez +2 more
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The role of hydrogen bonds in hydrous minerals stable at lower mantle pressure conditions
Progress in Earth and Planetary Science, 2022 Over the past few decades, hydrous minerals were thought to be absent in the lower mantle, due to their instability at high-pressure conditions. Recently, however, hydrous phases including phase H (MgSiO $$_4$$ 4 H $$_2$$ 2 ), pyrite-type FeOOH, and ...
Jun Tsuchiya, Elizabeth C. Thompson
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FEBS Letters, EarlyView.Mycobacterial 3‐methylcrotonyl‐CoA carboxylase uses a mobile biotin‐carrying domain to shuttle a carboxyl group between two catalytic sites, enabling carboxylation of 3‐methylcrotonyl‐CoA during leucine breakdown. Cryo‐electron microscopy captures the carrier at both sites and reveals an inward loop movement that may prevent futile rebinding to the ...
Ajit Yadav +2 more
wiley +1 more source
Acta Crystallographica Section E: Crystallographic CommunicationsThe two title compounds, 4a C19H19N2O3P and 4b C17H15N2O3P, are not isotypic. The tetracyclic ring systems are essentially planar. The phosphonate groups are similarly oriented.
Ghada A. Eldeken +6 more
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Tetraaqua(nitrato-κ2O,O′)bis(pyridinium-4-carboxylate-κO)europium(III) dinitrate
Acta Crystallographica Section E, 2011 The asymmetric unit of the title compound, [Eu(NO3)(C6H5NO2)2(H2O)4](NO3)2, consists of one-half of the C2 symmetric coordination cation and one nitrate anion. The eight-coordinated EuIII atom is in a distorted dodecahedral coordination environment.
Zhi-Guo Zhong +3 more
doaj +1 more source
The Shewanella oneidensis Fic enzyme SoFic targets the switch‐I region of EF‐Tu for AMPylation
FEBS Letters, EarlyView.Fic enzymes mediate diverse post‐translational modifications across all domains of life, including AMPylation. Prokaryotic EF‐Tu can be AMPylated and deAMPylated by the conserved Fic enzyme SoFic. Structural and biochemical approaches were used to characterize the effect of AMPylation on EF‐Tu, SoFic's enzymatic activities, and the enzyme‐target ...
Svenja Runge +6 more
wiley +1 more source
FEBS Letters, EarlyView.Heterodimeric amino acid transporters consist of SLC7 and SLC3 family proteins arranged in a conserved structural organization. They regulate nutrient transport across cell membranes, supporting essential cellular functions. These transporters also contribute to xenobiotic/drug uptake and distribution.
Mariafrancesca Scalise +5 more
wiley +1 more source