01726nas a2200181   4500008004100000022001400041245008800055210006900143260008400212300001400296490000700310520100500317100002901322700003101351700002401382700001801406856012001424       2007                        eng d  a0009-267300aCholesterol-linked beta-cyclodextrin - a thermotropic liquid-crystalline derivative0 aCholesterollinked betacyclodextrin a thermotropic liquidcrystall  a1-5 KANDA-SURUGADAI CHIYODA-KU, TOKYO, 101-8307, JAPANbCHEMICAL SOC JAPANcOCT  a1975-19800 v803 a<p>Liquid-crystalline derivative of ss-cyclodextrin (BCD) was prepared by covalent linking of monocholesteryl succinate (ChMS) with ss-cyclodextrin. To the best of our knowledge, this was first ever attempt so far of its kind, in which BCD has been converted into its liquid-crystalline derivative through covalent linkage of a mesogen. The degree of substitution (DS) obtained was approximate to 2.00. The product was characterized by various techniques, such as FT-IR, NMR, DSC, hot-stage-coupled optical polarizing microscopy (OPM), microanalysis and chemical methods. Cholesterol-linked ss-cyclodextrin (CDCh) derivative was found to exhibit thermotropic liquid-crystalline behavior. The product exhibited birefringence during first heating above 130 degrees C, and it became isotropic at about 180 degrees C, whereas the parent compound BCD decomposed without melting above 250 degrees C. A comparison of CDCh derivative to similar liquid-crystalline polysaccharide derivatives is presented.</p>1 aShaikh, Vasi, Ahmed Ebra1 aLonikar, Shrikant, Vitthal1 aDhoble, Deepa, Arun1 aPawar, G., M.  uhttp://library.ncl.res.in/content/cholesterol-linked-beta-cyclodextrin-thermotropic-liquid-crystalline-derivative-001743nas a2200241   4500008004100000022001400041245014400055210006900199260006800268300001400336490000800350520082900358653001401187653002201201653001401223653003301237100002401270700002001294700002101314700002401335700002001359856012201379       2007                        eng d  a0021-899500aControlled synthesis of low-molecular-weight polyethylene waxes by titanium-biphenolate-ethylaluminum sesquichloride based catalyst systems0 aControlled synthesis of lowmolecularweight polyethylene waxes by  a111 RIVER ST, HOBOKEN, NJ 07030 USAbJOHN WILEY & SONS INCcMAY  a1531-15390 v1043 a<p>Soluble complexes of titanium(IV) bearing sterically hindered biphenols, such as biphenol, 1,1'-methylene di-2-naphthol, 2,2'-methylene bis(4-chlorophenol), 2,2'-methylene bis(6-tert-butyl-4-ethyl phenol), and 2,2' ethylidene bis(4,6-di-tert-butyl phenol), were prepared and characterized. These catalyst precursors, formulated as [Ti((OO)-O-boolean AND)X-2], were active in the polymerization of ethylene at high temperatures in combination with ethylaluminum sesquichloride as a cocatalyst. The ultra-low-molecular-weight polyethylenes (PEs) were linear and crystalline and displayed narrow polydispersities. The catalytic polymerization leading to PE waxes in this reaction exhibited unique properties that have potential applications in surface coatings and adhesive formulations. (c) 2007 Wiley Periodicals, Inc.</p>10aCatalysts10apolyethylene (PE)10asynthesis10aZiegler-Natta polymerization1 aUmare, Prashant, S.1 aRao, Karumanchi1 aTembe, Gopal, L.1 aDhoble, Deepa, Arun1 aTrivedi, Bhavna  uhttp://library.ncl.res.in/content/controlled-synthesis-low-molecular-weight-polyethylene-waxes-titanium-biphenolate-1