Automatic repair: a polymer with pendent dibenzo[24]crown-8 units (purple in picture) was cross-linked by two bisammonium salts (green) to form two supramolecular gels based on host-guest interactions. These two gels are stimuli-responsive materials that respond to changes of the pH value and are also self-healing materials, as can be seen by eye and as evidenced by rheological data.

Abstract The graph-parameters mainly studies vertex degree and distance between unordered vertices. There are many graph-parameters, this paper focuses on the Gutman index. For sake of discussion, puts forward concept “ contribution” based relationship index graph vertex-Gutman On basis, we discussed unicyclic with pendent edges in odd even parts, gave corresponding extremal graphs, which lays ...

the purpose of this study was to assess exposure to hand-arm vibration in tiller users, forty users of tiller in northeastern provinces of iran were examined to measure hand-arm vibration parameters such as root mean square acceleration (rms), total equivalent acceleration, vibration dose value (vdv) and crest factor in three directions (x, y, and z) and various operating modes for comparing th...

In the title compound, C16H13NOS, the 1,4-thia-zine ring displays a screw-boat conformation. The conformation about the ethene bond [1.344 (2) Å] is Z. The plane of the fused benzene ring makes a dihedral angle of 58.95 (9)° with the pendent phenyl ring, indicating a twisted conformation in the mol-ecule. In the crystal, mol-ecules are linked by pairs of C-H⋯O hydrogen bonds, forming inversion ...

The research study was designed to compare the safety and efficacy of the regimen of 5-flurouracil with cisplatin of investigational arm with the reference regimen of gemcitabine with cisplatin for the treatment of gallbladder cancer. A total of 60 patients were enrolled in the study. Out of 30 patients enrolled in arm-A (Gemcitabine with Cisplatin) and 30 patients enrolled in arm-B (5-Fluroura...

The intramolecular asymmetric cyclization of aldehydes has been accomplished using singly occupied molecular orbital (SOMO) catalysis. Selective oxidation of chiral enamines (formed by the condensation of an aldehyde and a secondary amine catalyst) leads to the formation of a 3π-electron radical species. These chiral SOMO-activated radical cations undergo enantioselective cyclization with an ar...

Luby proposed a way to derandomize randomized computations which is based on the construction of a small probability space whose elements are wise inde pendent In this paper we prove some new properties of Luby s space More precisely we analyze the fourth moment and prove an interesting technical property which helps to understand better Luby s distribution As an application we study the behavi...