01695nas a2200253 4500008004100000022001400041245011300055210006900168260007300237300001000310490000700320520076400327653001001091653003101101653003301132653002101165653002201186653002101208653002801229100002201257700001701279700001801296856012701314 2012 eng d a1566-736700aEffect of particle size on selective hydrogenation of cinnamaldehyde by Pt encapsulated in mesoporous silica0 aEffect of particle size on selective hydrogenation of cinnamalde aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcNOV a42-460 v283 a

Pt nanoparticles of various sizes, viz. 8. 4.9, 3.6 and 1.8 nm were encapsulated in 2D hexagonal mesoporous silica by in-situ synthesis as well as post synthetic modifications so that the final catalyst composition was <= 1 wt.% Pt/SiO2. A kinetic analysis of the effect of particle size on selective hydrogenation of cinnamaldehyde was carried out on these catalysts. It was found that the materials, even at such low loading of Pt, were very active for the hydrogenation and selective for the desired product, cinnamyl alcohol. Among the different particle sizes, selectivity was found to be the highest on 8 nm particles. Kinetic analysis shows that the reaction follows a consecutive reaction pathway. (C) 2012 Elsevier B.V. All rights reserved.

10aalpha10abeta-Unsaturated aldehydes10aCinnamaldehyde hydrogenation10aKinetic analysis10aMesoporous silica10aPt nanoparticles10aSelective hydrogenation1 aPrashar, Atul, K.1 aMayadevi, S.1 aDevi, Nandini uhttp://library.ncl.res.in/content/effect-particle-size-selective-hydrogenation-cinnamaldehyde-pt-encapsulated-mesoporous-002403nas a2200229 4500008004100000022001400041245016300055210006900218260007500287300001400362490000700376520146300383653002201846653002101868653001101889653004301900653002901943100002301972700002501995700002602020856012702046 2013 eng d a1053-050900aKinetics and thermodynamics of glycans and glycoproteins binding to holothuria scabra lectin: a fluorescence and surface plasmon resonance spectroscopic study0 aKinetics and thermodynamics of glycans and glycoproteins binding a233 SPRING ST, NEW YORK, NY 10013 USAbSPRINGER/PLENUM PUBLISHERScNOV a1147-11550 v233 a

Holothuria scabra produces a monomeric lectin (HSL) of 182 kDa. HSL showed strong antibacterial activity and induced bacterial agglutination under in vitro conditions, indicating its role in animals' innate immune responses. Very few lectins have been reported from echinoderms and none of these lectins have been explored in detail for their sugar-binding kinetics. Affinity, kinetics and thermodynamic analysis of glycans and glycoproteins binding to HSL were studied by fluorescence and surface plasmon resonance spectroscopy. Lectin binds with higher affinity to O-linked than N-linked asialo glycans, and the affinities were relatively higher than that for sialated glycans and glycoproteins. T-antigen alpha-methyl glycoside was the most potent ligand having the highest affinity (Ka 8.32 x10(7) M-1). Thermodynamic and kinetic analysis indicated that the binding of galactosyl Tn-antigen and asialo glycans is accompanied by an enthalpic contribution in addition to higher association rate coupled by low activation energy for the association process. Presence of sialic acid or protein matrix inhibits binding. Higher affinity of HSL for O-glycans than N-glycans had biological implications; since HSL specifically recognizes bacteria, which have mucin or O-glycan cognate on their cell surfaces and play a major role in animal innate immunity. Since, HSL had higher affinity to T-antigen, makes it a useful tool for cancer diagnostic purpose.

10aHolothuria scabra10aKinetic analysis10aLectin10aSurface plasmon resonance spectroscopy10aThermodynamic properties1 aGowda, Nagaraj, M.1 aGaikwad, Sushama, M.1 aKhan, Mohammad, Islam uhttp://library.ncl.res.in/content/kinetics-and-thermodynamics-glycans-and-glycoproteins-binding-holothuria-scabra-lectin-001551nas a2200205 4500008004100000022001400041245008700055210006900142260000800211300001100219490000600230520087600236653002201112653002101134653001601155653002701171100001701198700001701215856011301232 2021 eng d a2666-790800aCobalt recovery from spent Li-ion batteries using lactic acid as dissolution agent0 aCobalt recovery from spent Liion batteries using lactic acid as  cJUL a1001220 v33 aThe effective recovery of cobalt from spent cathode materials is a critical issue and becomes a necessary assignment for the waste treatment of spent lithium-ion batteries (LIBs) in concern with waste to wealth. The dissolution process encompasses an organic acid leaching followed by recovery of pure Co oxalate. The use of lactic acid effectively improves the leaching of spent LiCoO2 materials with ascorbic acid. The leaching efficiencies of 99% for Li and 98% for Co were achieved under the optimal condition of 0.5 mol/L lactic acid and 0.02 mol/L ascorbic acid, solid/liquid ratio of 2 g/L, leaching time of 360 min and temperature of 90 °C. Based on the kinetic analysis, the enhancement leaching process is mainly on the concentration of dissolution reagent. Compared to other organic acids used previously, lactic acid showed better dissolution behavior.10aCathode recycling10aKinetic analysis10aLactic acid10aSpent Li-ion batteries1 aSanthosh, G.1 aNayaka, G.P. uhttp://library.ncl.res.in/content/cobalt-recovery-spent-li-ion-batteries-using-lactic-acid-dissolution-agent02247nas a2200241 4500008004100000022001400041245011700055210006900172260000800241300001400249490000800263520142700271653002001698653001701718653001801735653002101753653001701774100002301791700002301814700002101837700002101858856012601879 2022 eng d a0008-403400aKinetic study on alkylation of hydroquinone with methanol over SO3H functionalized Bronsted acidic ionic liquids0 aKinetic study on alkylation of hydroquinone with methanol over S cOCT a2986-29960 v1003 a

O-alkylation of a dihydric phenol (i.e., hydroquinone) with methanol in presence of benzoquinone catalyzed by double SO3H functionalized Bronsted acidic ionic liquids (i.e., 1,3-disulphonic acid imidazolium hydrogen sulphate, 1,3-disulphonic acid benzimidazolium hydrogen sulphate, and sulphuric acid) is studied in a batch reactor. The sensitivity of activity and selectivity with reaction time, temperature, speed of agitation, and catalyst loading was examined. The plausible reaction pathways proposed based on the experimental observations and detailed kinetic investigation are performed by assuming a homogeneous reaction phase. The kinetic parameters, such as pre-exponential factor and activation energy, are estimated for both ionic liquids and sulphuric acid by considering all competitive reactions, and comparative results were presented. An extended form of the Arrhenius equation is used to estimate the kinetic parameters for the reaction which showed curvature in lnk against a 1/T plot. The model prediction with the estimated kinetic parameters is in good agreement with the experimental data, which confirmed the model validity in the experimental operating range. It was found that ionic liquid has a potential application in the synthesis of a selective monoalkylated product of hydroquinone. The kinetic analysis performed is found to be useful in the understanding of process behaviour.

10a4-Methoxyphenol10aHydroquinone10aionic liquids10aKinetic analysis10aO-alkylation1 aBhongale, Priyanka1 aAmonkar, Amogh, A.1 aJoshi, Sunil, S.1 aMali, Nilesh, A. uhttp://library.ncl.res.in/content/kinetic-study-alkylation-hydroquinone-methanol-over-so3h-functionalized-bronsted-acidic