01580nas a2200253   4500008004100000022001400041245012600055210006900181260009500250300001200345490000800357520058400365653001100949653002700960653002300987653004701010653001801057100002201075700002601097700002201123700002101145700002801166856013201194       2014                        eng d  a0021-979700aCalcium oxide supported gold nanoparticles as catalysts for the selective epoxidation of styrene by t-butyl hydroperoxide0 aCalcium oxide supported gold nanoparticles as catalysts for the   a525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USAbACADEMIC PRESS INC ELSEVIER SCIENCEcFEB  a111-1160 v4153 a<p>Gold nanoparticles are deposited on basic CaO supports as catalysts for the selective conversion of styrene into styrene oxide. Synthetic methods, gold loading and calcination temperatures are varied to permit an understanding of their influence on gold nanoparticle size, the presence of cationic gold species and the nature of interaction between the gold nanoparticles and the CaO support. Based on these studies, optimal conditions are designed to make the Au/CaO catalyst efficient for the selective epoxidation of styrene. (C) 2013 Elsevier Inc. All rights reserved.</p>10aAu/CaO10aEpoxidation of styrene10agold nanoparticles10aHomogenous deposition precipitation method10aStyrene oxide1 aDumbre, Deepa, K.1 aChoudhary, Vasant, R.1 aPatil, Nilesh, S.1 aUphade, Balu, S.1 aBhargava, Suresh, Kumar  uhttps://library.ncl.res.in/content/calcium-oxide-supported-gold-nanoparticles-catalysts-selective-epoxidation-styrene-t-butyl-002001nas a2200217   4500008004100000022001400041245008000055210006900135260011000204300001600314490000700330520117500337100001801512700002201530700002201552700002401574700002601598700002801624700001801652856011301670       2015                        eng d  a1463-907600aCharge-switchable gold nanoparticles for enhanced enzymatic thermostability0 aChargeswitchable gold nanoparticles for enhanced enzymatic therm  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcJUL  a21517-215240 v173 a<p>This study illustrates a facile strategy for efficient immobilization of enzymes on a metal nanoparticle surface. The strategy proposed here enables the enzymatic activity to be retained while increasing the enzyme thermostability. It is demonstrated that the use of a zwitterionic amino acid tyrosine as a reducing and capping agent to synthesise gold nanoparticles allows efficient immobilization of phytase enzyme through charge-switchable electrostatic interactions. The detailed kinetic and thermodynamic studies reveal that the proposed enzyme immobilization strategy improves the overall quality of phytase by reducing the activation energy required for substrate hydrolysis and broadening the temperature window in which immobilized enzyme is able to operate. The outcomes of this study indicate that the underlying zwitterionic nature of 20 natural amino acids along with significant variability in their isoelectric points and hydropathy indices as well the ability of some of the amino acids to reduce metal ions is likely to offer significant opportunities for tailoring nano-bio interfaces in a rational manner for a range of biological applications.</p>1 aShankar, Shiv1 aSoni, Sarvesh, K.1 aDaima, Hemant, K.1 aSelvakannan, P., R.1 aKhire, Jayant, Malhar1 aBhargava, Suresh, Kumar1 aBansal, Vipul  uhttps://library.ncl.res.in/content/charge-switchable-gold-nanoparticles-enhanced-enzymatic-thermostability-0