نتایج جستجو برای: molecules structure
تعداد نتایج: 1719621 فیلتر نتایج به سال:
The Crystal Structure of I H ~ )CH2 COC(>Hs has been determined by direct method (Sir). The dimensions of used cry:,tal were 0.7 x 0.3 x 0.2 mm. TIle molecular structure has been determined by MolEN program. This compound crystalizc.s in monoclinic space group P2t /n (14) with four molecules per unit cell. Lattice parameters of this ...
[Cd(NO)z(u rea)4J was synthesized by reaction of cadmium nitrate and urea under certain conditions. The dimensions of used crystal were O.47xO.40x0.58 mm. The molecular structure has been determined by SHELX-86 program. This complex crystalizes in monoclinic space group P2}/a with two molecules per uni. cell. Lattice parameters of this compound are: a~7.6060 A b~12.7740 A c~9.0370 A P~ll...
Following the suggestion of triple-collagen (Ramachandran and Kartha, chain models for the helical molecules of 1955), improved similar structures were
MHC class I molecules (MHC-I) are cell surface recognition elements expressed on virtually all somatic cells. These molecules sample peptides generated within the cell and signal the cell's physiological state to effector cells of the immune system, both T lymphocytes and natural killer (NK) cells. In addition, molecules structurally related to MHC-I, collectively known as MHC-Ib, are more spec...
Recent Hyper Rayleigh Scattering measurements report a significant increase of second-order hyperpolarizability upon introduction of positive charges at the pyridyl end groups in trispyridyl octopolar chromophores. We calculated the geometries, linear response, and first-order hyperpolarizabilities of a series of six trispyridyl molecules both in the neutral and protonated forms. The calculatio...
The multiconfiguration valence-bond method (VB) is applied to diatomic molecules using the Hartree-Fock (HF) atomic basis set. The hyperfine constant, Fermi contact term, is computed as a function of the interatomic separation for the X2∏ ground state of 17OH and X1∑ ground state of 107AgH+ molecules. This study leads to a number of conclusions about the influence of correlation and polarizatio...
surfactant molecules are used as interesting tools to study the structure, function and stability of proteins. protonation states of amino acids may be changed in the presence of surfactants. in this work, using experimental observations and molecular dynamic simulation, the effects of sodium dodecyl sulfate on the acid dissociation constants of tryptophan was examined. the acid–base equilibriu...
Considerable advances have been made in our knowledge of the molecular structure of cell adhesion molecules, their binding sites, and adhesion complexes. For the cadherins, protein zero, and CD2, additional experimental data support the insights obtained from structural analysis of their domains and molecular models of their adhesion complexes. For neural cell adhesion molecules, L1, fibronecti...
This April, in Cambridge (UK), principal investigators from the Mathematical Biology Group of the Medical Research Council's National Institute of Medical Research organized a workshop in structural bioinformatics at the Centre for Mathematical Sciences. Bioinformatics researchers of several nationalities from labs around the country presented and discussed their computational work in biomolecu...
I. Carbohydrates Carbohydrates are also called saccharides, which is derived from the Greek word sakcharon meaning sugar. The simplest carbohydrates are called monosaccharides, and the biologically important monosaccharides contain from 3 to 7 carbon atoms. The monosaccharides with 5 carbons (the pentoses) and with 6 carbons (the hexoses) may take on different configurations in an aqueous solut...
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