00686nas a2200181   4500008004100000245012500041210006900166260000800235300001600243490000700259100001800266700001500284700002100299700001900320700002500339700001700364856012300381       2016                        eng d00aCysteine-specific fluorescent switch for monitoring oxidative stress and quantification of aminoacylase-1 in blood serum0 aCysteinespecific fluorescent switch for monitoring oxidative str  cDEC  a12161-121680 v881 aAnila, H., A.1 aAli, Firoj1 aKushwaha, Shilpi1 aTaye, Nandaraj1 aChattopadhyay, Samit1 aDas, Amitava  uhttps://library.ncl.res.in/content/cysteine-specific-fluorescent-switch-monitoring-oxidative-stress-and-quantification01921nas a2200193   4500008004100000245008100041210006900122260000800191300001600199490000700215520124900222100002101471700001901492700002701511700002601538700003501564700001701599856011101616       2017                        eng d00aCucurbit[7]uril induced formation of fret-enabled unilamellar lipid vesicles0 aCucurbit7uril induced formation of fretenabled unilamellar lipid  cOCT  a10989-109990 v333 aA unique fluorescence resonance energy transfer (FRET) process is found to be operational in a unilamellar lipid self-assembly in the aqueous phase. A newly synthesized naphthyl based long chain lipid derivative [N-(naphthalene-1-ylmethyl)tetradecane-1-ammonium chloride, 14NA(+)] forms various self-assembled architectures in the aqueous phase. Controlled changes in lipid concentration lead to a transition of the self-assemblies from micelles to vesicles to rods. In the presence of cucurbit[7]uril (CB7), 14NA(+) forms a host-guest [2]pseudorotaxane complex (CB7(sic)14NA(+)) and secondary interactions lead to the formation of a lipid bilayer with hydrophobic pockets situated in between the layers. The change in the structure of 14NA(+) assemblies, interaction with CB7 and formation of supramolecular assemblies of CB7(sic)14NA(+) were examined using light scattering, spectroscopic, and microscopic techniques. Entrapment of a luminescent dye, anthracene within the hydrophobic bilayer of the supramolecular assembly CB7(sic)14NA(+) favors a modified luminescent response due to an efficient FRET process. Further, the FRET process could be controlled by thermal and chemical stimuli that induce transformation of unilamellar vesicles.1 aKushwaha, Shilpi1 aMaity, Arunava1 aGangopadhyay, Monalisa1 aRavindranathan, Sapna1 aRajamohanan, Pattuparambil, R.1 aDas, Amitava  uhttps://library.ncl.res.in/content/cucurbit7uril-induced-formation-fret-enabled-unilamellar-lipid-vesicles01967nas a2200157   4500008004100000245011000041210006900151260000800220490000600228520137000234100002101604700001801625700002001643700001601663856013001679       2017                        eng d00aEfficient valorisation of palm shell powder to bio-sorbents for copper remediation from aqueous solutions0 aEfficient valorisation of palm shell powder to biosorbents for c  cAPR0 v53 aAlternative bio-sorbents, prepared from cost effective pre-treatment of biomass have been used to remediate toxic heavy metals. Palm shell powder (PSP) and acid treated palm shell powder (APSP) provide an attractive approach for the removal of Cu(II) from aqueous solutions and further use of the copper loaded adsorbents as catalysts. PSP was charred with sulfuric acid (H2SO4) to oxidize ligno-cellulosic groups present in PSP, resulted in acid treated palm shell powder (APSP). Structure property relationship was explored with the help of sophisticated spectroscopic tools (¹³C nuclear magnetic resonance (¹³C NMR), X-Ray photoelectron spectroscopy (XPS), X-Ray diffraction (XRD) and Fourier-transform infrared (FTIR) spectroscopy). Pretreatment lead to conversion of ligno-cellulosic content to more valuable and easily process-able polysaccharide content.APSP and PSP displayed a maximum adsorption capacity of 125 and 36 mg/g respectively for copper. Copper adsorption was found to be more in APSP due to presence of COOH groups which rendered the surface more hydrophilic and amenable to enhanced Cu²⁺ sorption. Furthermore the adsorbents loaded with copper could be used as catalysts for oxidation of styrene. The developed adsorbents promise advantages such as low cost, high adsorption capacity, environmental friendliness as well as zero sludge. 1 aKushwaha, Shilpi1 aSoni, Harnish1 aBojja, Sreedhar1 aPadmaja, P.  uhttps://library.ncl.res.in/content/efficient-valorisation-palm-shell-powder-bio-sorbents-copper-remediation-aqueous-solutions01529nas a2200169   4500008004100000245006400041210006100105260000800166300001700174490000600191520099700197100001701194700002101211700002001232700001601252856009101268       2018                        eng d00a Chitosan-thiobarbituric acid: a superadsorbent for mercury0 aChitosanthiobarbituric acid a superadsorbent for mercury  cOCT  a 13183-131940 v33 aIn the present investigation, chitosan (CH) as supramolecularly cross-linked with thiobarbituric acid to form CT. CT was well characterized by UV, scanning electron microscopy-energy-dispersive X-ray analysis, Fourier trans form infrared, NMR, differential scanning calorimetry, thermogravimetric analysis, and X-ray difTraction analyses, and its adsorption potential for elemental mercury (Hg-0), inorganic mercury (Hg2+), and methyl mercury (CH3Hg+) was investigated. Adsorption experiments were conducted to optimize the parameters for removal of the mercury species under study, and the data were analyzed using Langmuir, Freundlich, an Temkin adsorption isotherm models. CT was found to have high adsorption capacities of 1357.69, 2504.86, and 2475.38 rng/g for Hg-0, Hg2+, and CH3Hg+, respectively. The adsorbent CT could be reused up elemental mercury using 0.01 N thiourea, inorganic mercury using 0.01 N perchloric acid, and methyl to three cycles by eluting mercury with 0.2 N NaCl.1 aBhatt, Rahul1 aKushwaha, Shilpi1 aBojja, Sreedhar1 aPadmaja, P.  uhttps://library.ncl.res.in/content/chitosan-thiobarbituric-acid-superadsorbent-mercury01863nas a2200157   4500008004100000245009900041210006900140260000800209300001400217490000800231520127100239100002101510700002301531700002401554856012701578       2018                        eng d00apH-dependent speciation and hydrogen (H-2) control U(VI) respiration by Desulfovibrio vulgaris0 apHdependent speciation and hydrogen H2 control UVI respiration b  cJUN  a1465-14740 v1153 aIn situ bioreduction of soluble hexavalent uranium U(VI) to insoluble U(IV) (as UO2) has been proposed as a means of preventing U migration in the groundwater. This work focuses on the bioreduction of U(VI) and precipitation of U(IV). It uses anaerobic batch reactors with Desulfovibrio vulgaris, a well-known sulfate, iron, and U(VI) reducer, growing on lactate as the electron donor, in the absence of sulfate, and with a 30-mM bicarbonate buffering. In the absence of sulfate, D. vulgaris reduced >90% of the total soluble U(VI) (1mM) to form U(IV) solids that were characterized by X-ray diffraction and confirmed to be nano-crystalline uraninite with crystallite size 2.8 +/- 0.2nm. pH values between 6 and 10 had minimal impact on bacterial growth and end-product distribution, supporting that the mono-nuclear, and poly-nuclear forms of U(VI) were equally bioavailable as electron acceptors. Electron balances support that H-2 transiently accumulated, but was ultimately oxidized via U(VI) respiration. Thus, D. vulgaris utilized H-2 as the electron carrier to drive respiration of U(VI). Rapid lactate utilization and biomass growth occurred only when U(VI) respiration began to draw down the sink of H-2 and relieve thermodynamic inhibition of fermentation.1 aKushwaha, Shilpi1 aMarcus, Andrew, K.1 aRittmann, Bruce, E.  uhttps://library.ncl.res.in/content/ph-dependent-speciation-and-hydrogen-h-2-control-uvi-respiration-desulfovibrio-vulgaris02838nas a2200253   4500008004100000022001400041245013200055210006900187260000800256300001400264490000600278520194300284653003702227653002602264653002802290653002002318653001202338653002902350100002102379700001602400700002602416700001702442856012502459       2020                        eng d  a2379-369400aPolymer nanorings with uranium specific clefts for selective recovery of uranium from acidic effluents via reductive adsorption0 aPolymer nanorings with uranium specific clefts for selective rec  cOCT  a3254-32630 v53 a<p>Nanostructured polymeric materials, functionalized with an appropriate receptor, have opened up newer possibilities for designing a reagent that shows analyte-specific recognition and efficient scavenging of an analyte that has either a detrimental influence on human physiology and environment or on its recovery for further value addition. Higher active surface area, morphological diversity, synthetic tunability for desired surface functionalization, and the ease of regeneration of a nanostructured material for further use have provided such materials with a distinct edge over conventional reagents. The use of a biodegradable polymeric backbone has an added significance owing to the recent concern over the impact of polymers on the environment. Functionalization of biodegradable sodium alginate with AENA (6.85% grafting) as the receptor functionality led to a unique open framework nanoring (NNRG) morphology with a favorable spatial orientation for specific recognition and efficient binding to uranyl ions (U) in an aqueous medium over a varied pH range. Nanoring morphology was confirmed by transmission electron microscopy and atomic force microscopy images. The nanoscale design maximizes the surface area for the molecular scavenger. A combination of all these features along with the reversible binding phenomenon has made NNRG a superior reagent for specific, efficient uptake of UO22+ species from an acidic (pH 3-4) solution and compares better than all existing UO22+-scavengers reported till date. This could be utilized for the recovery of uranyl species from a synthetic acidic effluent of the nuclear power. The results of the U uptake experiments reveal a maximum adsorption capacity of 268 mg of U per g of NNRG in a synthetic nuclear effluent. X-ray photoelectron spectroscopy studies revealed a reductive complexation process and stabilization of U(IV)-species in adsorbed uranium species (U@NNRG).</p>
10abiodegradable polymeric backbone10amolecular recognition10ananostructured material10asodium alginate10auranium10auranyl-specific receptor1 aKushwaha, Shilpi1 aMane, Manoj1 aRavindranathan, Sapna1 aDas, Amitava  uhttps://library.ncl.res.in/content/polymer-nanorings-uranium-specific-clefts-selective-recovery-uranium-acidic-effluents