Results 91 to 100 of about 285,295 (266)

Three hexahydropyridopyrimidine-spiro-cyclohexanetriones: supramolecular structures generated by O-H...O, N-H...O, C-H...O and C-H...π hydrogen bonds, and π...π stacking interactions

open access: yes, 2004
4',4'-Dimethyl-2-methylsulfanyl-3,4,5,6,7,8-hexahydropyrido-[2,3-d] pyrimidine-6-spiro-1'-cyclohexane-2',4,6'-trione, C15H19N3O3S, (I), has a markedly polarized molecular-electronic structure, and the molecules are linked into a three-dimensional ...
Low, JN   +6 more
core   +1 more source

Crystal structure of (S)-2-amino-2-methylsuccinic acid

open access: yesActa Crystallographica Section E: Crystallographic Communications, 2015
The title compound, C5H9NO4, crystallized as a zwitterion. There is an intramolecular N—H...O hydrogen bond involving the trans-succinic acid and the ammonium group, forming an S(6) ring motif.
Isao Fujii
doaj   +1 more source

Hyperactive ice‐binding proteins stabilize cell membranes and improve resistance to dehydration stress in Caenorhabditis elegans

open access: yesFEBS Open Bio, EarlyView.
TisIBP8, a fungal‐derived hyperactive ice‐binding protein, helps Caenorhabditis elegans survive dehydration. It localizes near cell membranes, reduces cell damage, and helps maintain membrane structure during drying. These results suggest that ice‐binding proteins can protect cells from dehydration stress as well as freezing stress.
Daiki Shimose   +9 more
wiley   +1 more source

Pressure variation of the O-H bond length in O-H---O hydrogen bonds

open access: yes, 1997
Recent neutron diffraction studies have shown that O-H bond lengths do not show the same variation under pressure as given by the well-known empirical relationship between O-H and O-H---O bond distances.
Sikka, S. K.
core   +1 more source

Ethyl 4-(4-hydroxyphenyl)-6-methyl-2-oxo-1,2,3,4-tetrahydropyrimidine-5-carboxylate monohydrate

open access: yesActa Crystallographica Section E, 2008
There are three formula units in the asymmetric unit of the title compound, C14H16N2O4·H2O. Molecules are linked by N—H...O hydrogen bonds into dimers with the common R22(8) graph-set motif.
T. N. Guru Row   +4 more
doaj   +1 more source

Molecular characterization of covRS mutations in M1UK Streptococcus pyogenes

open access: yesFEBS Open Bio, EarlyView.
Group A Streptococcus (GAS) acquires covRS mutations driving a hypervirulent bacterial state, frequently associated with invasive disease‐like necrotizing fasciitis. We demonstrate that the newly emerged M1UK GAS lineage can also acquire these mutations.
Jarrad Pritchard   +12 more
wiley   +1 more source

Bis(phenylphosphonic) anhydride

open access: yes, 2009
The asymmetric unit of the title compound, C12H12O5P2, contains four independent molecules, generating two dimers via pairs of intermolecular O-H center dot center dot center dot O hydrogen bonds, forming R-2(2) (8) rings.
Woollins, J. Derek   +7 more
core   +1 more source

(2E)-1-(3,5-Dihydroxyphenyl)-3-(4-methoxyphenyl)prop-2-en-1-one

open access: yesActa Crystallographica Section E, 2014
In the title compound, C16H14O4, the benzene rings are inclined to one another by 4.91 (7)°. The conformation about the C=O and C=C bonds is trans and cis, respectively.
K. S. Ezhilarasi   +4 more
doaj   +1 more source

Effect of terahertz irradiation on DNA damage repair in living cells

open access: yesFEBS Open Bio, EarlyView.
We investigated the effect of terahertz (THz) wave irradiation on DNA double‐strand break (DSB) repair in living cells. We found that THz irradiation enhanced DSB repair at specific frequencies, whereas heat treatment inhibited it, indicating that this effect is nonthermal and frequency‐specific.
Yuya Ueno   +3 more
wiley   +1 more source

1-(3-Chlorophenyl)-3-(2,6-dichlorobenzoyl)thiourea

open access: yes, 2009
The structure of the title compound, C14H9Cl3N2OS, is composed of discrete molecules with bond lengths and angles quite typical for thiourea compounds of this class. The plane containing the thiocarbonyl and carbonyl groups subtends dihedral angles of 48.
Bolte, Michael   +5 more
core   +1 more source

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