01431nas a2200181   4500008004100000022001400041245012100055210006900176260008900245300002000334520068100354653000901035653002301044653001901067100002001086700002001106856012301126       2007                        eng d  a1618-722900aSynthesis, characterization, and performance evaluation of polymeric hindered amine light stabilizers (HALS) in EPDM0 aSynthesis characterization and performance evaluation of polymer  a1, QUAI LEZAY-MARNESIA, F067000 STRASBOURG, FRANCEbEUROPEAN POLYMER FEDERATIONcAPR  aArticle No. 0383 a<p>Polymeric hindered amine light stabilizer (HALS), wherein the hindered amine functionality was attached to the brominated ethylene-propylene-diene terpolymer (EPDM) was synthesized. The brominated EPDM was synthesized as an intermediate for the synthesis of a new polymeric hindered amine light stabilizer. The grafting and functionalization reactions were characterized by FTIR and (HNMR)-H-1 spectroscopy. The photostabilizing efficiency of this polymeric HALS was studied and compared with conventional HALS under accelerated weathering conditions. The results of the study give evidence for superiority of polymeric HALS over that of melt blended conventional HALS.</p>10aEPDM10aPhotostabilization10apolymeric HALS1 aRana, Sravendra1 aSingh, Raj, Pal  uhttp://library.ncl.res.in/content/synthesis-characterization-and-performance-evaluation-polymeric-hindered-amine-light01747nas a2200301   4500008004100000022001400041245010100055210006900156260007700225300001200302490000800314520070400322653002101026653001301047653002601060653003401086653002401120100002301144700002201167700001901189700002101208700001601229700001701245700002201262700002001284700001801304856012301322       2011                        eng d  a1438-749200aSynthesis and drug-delivery behavior of chitosan-functionalized graphene oxide hybrid nanosheets0 aSynthesis and drugdelivery behavior of chitosanfunctionalized gr  aBOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANYbWILEY-V C H VERLAG GMBHcFEB  a131-1400 v2963 a<p>Chitosan-functionalized graphene oxides (FGOCs) were successfully synthesized. FGOCs were found to significantly improve the solubility of the GO in aqueous acidic media. The presence of organic groups was confirmed by means of XPS and TGA. Restoration of the sp(2) carbon network and exfoliation of graphene sheets were confirmed by Raman spectroscopy, UV-visible spectroscopy and WAXD. The SEM and AFM investigations of the resultant FGOCs showed that most of the graphene sheets were individual and few were layered. Controlled release behavior of Ibuprofen and 5-fluorouracil was then investigated. We found that FGOCs are a promising new material for biological and medical applications.</p>10aBiocompatibility10aChitosan10adrug delivery systems10afunctionalization of polymers10asolution properties1 aRana, Vijay, Kumar1 aChoi, Myeon-Cheon1 aKong, Jin-Yeon1 aKim, Gwang, Yeon1 aKim, Mi, Ju1 aKim, Sun-Hee1 aMishra, Satyendra1 aSingh, Raj, Pal1 aHa, Chang-Sik  uhttp://library.ncl.res.in/content/synthesis-and-drug-delivery-behavior-chitosan-functionalized-graphene-oxide-hybrid-002734nas a2200169   4500008004100000245012100041210007000162260000800232300001400240490000600254520207300260100002602333700002802359700002802387700002002415856012902435       2017                        eng d00aStabilization of γ-sterilized low-density polyethylene by synergistic mixtures of food-contact approval stabilizers0 aStabilization of γsterilized lowdensity polyethylene by synergis  cJUN  a145–1560 v83 aIn our previous studies, we have found the synergistic combinations of stabilizers which follow different mechanisms of stabilization and are approved for food contact applications. The present attempt is to test the potentials of those systems in stabilizing γ-sterilized low-density polyethylene (LDPE). The results were discussed by comparing the stabilizing efficiency of mixtures with and without phenol systems as well as with their counterparts of isotactic polypropylene (iPP) and ethylene-propylene copolymers (EP) matrices. LDPE has been melt-mixed with tertiary hindered amine stabilizer (tert-HAS), oligomeric HAS stabilizer, phenolic and organo-phosphite antioxidants and subjected to γ-sterilization. Stabilization in terms of changes in oxidation products, tensile properties, yellowing and surface morphology was evaluated by FT-IR spectroscopy, Instron, colorimetry, and scanning electron microscopy (SEM), respectively. The results of the present study confirm the validity of those systems for protecting various polyolefins against γ-sterilization. The results showed that the synergism, antagonism and the trend in stabilization efficiency of the binary, ternary and quaternary stabilizer systems were almost similar in LDPE, iPP and EP matrices. The binary system of oligomeric HAS and tert-HAS has shown the antagonistic effect of stabilization, whereas their combination with organo-phosphite has exhibited synergistic effect even at higher doses of γ-sterilization. The combination of oligomeric HAS, tert-HAS, organo-phosphite and hindered phenol exhibited improved stabilization efficiency than single or binary additive systems. The phenol systems have shown long term of stability than that of phenol-free systems. It was found that the consumption of oligomeric stabilizer significantly depends on the components of stabilization mixture. It was concluded that the stability of polyolefins (LDPE, iPP and EP) against γ-sterilization can be achieved by blends of different stabilizers which are approved for food contact applications.1 aAlariqi, Sameh, A. S.1 aAl-Areqi, Niyazi, A. S.1 aAlaghbari, Elyas, Sadeq1 aSingh, Raj, Pal  uhttp://library.ncl.res.in/content/stabilization-%CE%B3-sterilized-low-density-polyethylene-synergistic-mixtures-food-contact