نتایج جستجو برای: internal bond
تعداد نتایج: 300930 فیلتر نتایج به سال:
BACKGROUND In solid state structures of organic molecules, identical sets of H-bond donor and acceptor functions can result in a range of distinct H-bond connectivity modes. Specifically, competing H-bond structures (HBSs) may differ in the quantitative proportion between one-point and multiple-point H-bond connections. For an assessment of such HBSs, the effects of their internal as well as ex...
Direct NMR Detection of Bifurcated Hydrogen Bonding in the α-Helix N-Caps of Ankyrin Repeat Proteins
In biomolecules, bifurcated H-bonds typically involve the interaction of two donor protons with the two lone pairs of oxygen. Here, we present direct NMR evidence for a bifurcated H-bonding arrangement involving nitrogen as the acceptor atom. Specifically, the H-bond network comprises the Nδ1 atom of histidine and both the backbone N-H and side-chain Oγ-H of threonine within the conserved TXXH ...
Micromechanics of the internal bond in wood plastic composites: integrating measurement and modeling
Materials and Methods: 15 single rooted premolars were selected and middle portion of each root was sectioned perpendicular to the long axis to produce two discs of 2.00 ± 0.05 mm thickness using a diamond disk. 30 root slices were produced and canal lumen was widened using Gates Glidden drills to produce standardized internal diameter of 1.3mm and root sections were filled with ERRM, MTA and B...
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