Results 201 to 210 of about 341,897 (260)
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Conformational analysis of sialyloligosaccharides
Carbohydrate Research, 1991The conformational properties of several sialyloligosaccharides present as terminal sequences in N- and O-linked carbohydrate groups of glycoproteins, have been analyzed based on the n.m.r. data of selected sialosides. The compounds examined include representatives of the alpha-D-NeuAc-(2----6)-beta-D-Gal-(1----4)-beta-D-GlcNAc, alpha-D-NeuAc-(2----3 ...
S, Sabesan, K, Bock, J C, Paulson
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Conformational analysis of xyloglucans
International Journal of Biological Macromolecules, 1990Xyloglucan isolated from the elongating regions of pea stems was examined using X-ray diffraction and energy calculations. The X-ray fibre pattern suggested that the backbone (1----4)-beta-D-glucan takes an extended two-fold helix similar to common cellulose.
K, Ogawa, T, Hayashi, K, Okamura
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Tetrahedron, 1981
Abstract The solution conformation of bicyclo [3.1.0] hexan-3-one has been obtained by the use of the shifts induced in its 1H and 13C NMR by Yb(fod)3. Refinement of the angle of pucker, ∝, of the 5-membered ring indicates that the molecule adopts a flattened boat conformation with ∝ = 195°.
Raymond J. Abraham +2 more
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Abstract The solution conformation of bicyclo [3.1.0] hexan-3-one has been obtained by the use of the shifts induced in its 1H and 13C NMR by Yb(fod)3. Refinement of the angle of pucker, ∝, of the 5-membered ring indicates that the molecule adopts a flattened boat conformation with ∝ = 195°.
Raymond J. Abraham +2 more
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Conformational analysis of cyproheptadine hydrochloride
Journal of Medicinal Chemistry, 1990A nuclear magnetic resonance and theoretical study on the conformations and molecular flexibility of cyproheptadine hydrochloride (1) is reported. In the 1H NMR spectrum of 1 in CDCl3, two conformational forms are observed to occur in an approximate ratio of 1:4. In both forms, NOE and coupling constant measurements suggested that the terminal N-methyl
Sadek, M +3 more
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Image Analysis by Conformal Embedding
Journal of Mathematical Imaging and Vision, 2011zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Oliver Fleischmann +2 more
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Synthesis and Conformational Analysis of Efrapeptins
Chemistry – A European Journal, 2011AbstractThe efrapeptin family of peptide antibiotics produced by the fungus Tolypocladium niveum, and the neo‐efrapeptins from the fungus Geotrichum candidumare inhibitors of F1‐ATPase with promising antitumor, antimalaria, and insecticidal activity. They are rich in Cα‐dialkyl amino acids (Aib, Iva, Acc) and contain one β‐alanine and several pipecolic
Weigelt, Sven +16 more
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2012
This chapter examines conformational analysis. Even though no two molecules have exactly the same shape at any one time, they are still all the same chemical compound—they have all the same atoms attached in the same way. The different shapes of molecules of the same compound are called different conformations.
Jonathan Clayden +2 more
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This chapter examines conformational analysis. Even though no two molecules have exactly the same shape at any one time, they are still all the same chemical compound—they have all the same atoms attached in the same way. The different shapes of molecules of the same compound are called different conformations.
Jonathan Clayden +2 more
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Conformation analysis of eel calcitonin
European Journal of Biochemistry, 1998The solution structure of eel calcitonin in a mixture of 60 % water and 40 % trifluoroethanol has been determined in this study by the combined use of 1H‐NMR spectroscopy and distance geometry calculations. 1H‐NMR spectroscopy provided 181 distance constraints, 5 dihedral angle constraints and 14 hydrogen bond constraints.
K, Ogawa +6 more
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Conformational analysis of 1,4-heterophosphinanes
Russian Journal of General Chemistry, 2007Structure of 1,4-heterophosphinanes in solution was studied by the methods of dipole moments, Kerr effect, molecular mechanics, and density functional theory calculations. It was determined that chair conformation with an equatorial orientation of the exocyclic phenyl substituent is preferred for 1,4-heterophosphinanes independent of the second ...
Vereshchagina Y. +4 more
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Conformational analysis of xylan chains
Carbohydrate Research, 2005The present study provides a theoretical description of the different levels of structural organization that characterize the xylan polysaccharide in its native and hydrophobic lauroyl esterified forms. The goal of this study was to ascertain the role played by the hydroxyl or lauroyl side groups on the conformational flexibility of the xylan chain ...
Mazeau, Karim +3 more
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