http://nopr.niscpr.res.in/handle/123456789/19582 2026-10-17T14:31:46Z 2026-10-17T14:31:46Z Singh, Naorem Shubhaschandra http://nopr.niscpr.res.in/handle/123456789/19631 2013-07-12T16:37:14Z 2013-07-01T00:00:00Z

Title: Effect of surfactants on polyvinyl alcohol-borax hydrogel: Rheology and thermal aspects Authors: Singh, Naorem Shubhaschandra Abstract: <span style="font-size:11.0pt;font-family: " times="" new="" roman";mso-fareast-font-family:"times="" roman";mso-bidi-font-family:="" mangal;mso-ansi-language:en-gb;mso-fareast-language:en-us;mso-bidi-language:="" hi"="" lang="EN-GB">Addition of the surfactant, sodium dodecyl sulphate well below the critical micelle concentration facilitates cross-linked networks in the polyvinyl alcohol-borax hydrogel, while at a concentration higher than the CMC, surfactant micelles start destabilizing the cross-linking in the gel network. The PVA-borax hydrogel shows an increased elastic behavior, in particular at lower SDS concentration and Maxwellian fluid behaviour at lower concentration of both SDS and T<span style="font-size:11.0pt;font-family: " times="" new="" roman";mso-fareast-font-family:"times="" roman";mso-ansi-language:="" en-gb;mso-fareast-language:en-us;mso-bidi-language:hi"="" lang="EN-GB">X<span style="font-size:11.0pt;font-family:" times="" new="" roman";mso-fareast-font-family:="" "times="" roman";mso-bidi-font-family:mangal;mso-ansi-language:en-gb;="" mso-fareast-language:en-us;mso-bidi-language:hi"="" lang="EN-GB">-100. Inclusion of SDS in the hydrogel also significantly lowers the gel-sol transition temperature. </span></span></span> Page(s): 879-883

2013-07-01T00:00:00Z Yang, Xiaodeng Li, Tianduo Shi, Lei Li, Junying Chai, Jinling http://nopr.niscpr.res.in/handle/123456789/19630 2013-07-15T16:37:35Z 2013-07-01T00:00:00Z

Title: Composition of <i style="mso-bidi-font-style: normal">n</i>-dedocyl polyglucoside based middle phase microemulsions in surfactant-enhanced aquifer remediation Authors: Yang, Xiaodeng; Li, Tianduo; Shi, Lei; Li, Junying; Chai, Jinling Abstract: The composition and solubilization power of the middle phase microemulsion formed by<i> n</i>-dodecyl polyglucoside (APG)/ <i style="mso-bidi-font-style:normal">n</i>-butanol/water/non-aqueous phase liquids (NAPLs) quaternary system have been studied. The hydrophile-lipophile balanced (HLB) plane equation for the quaternary system has been deduced. Some physicochemical parameter, such as the mass fraction of <i style="mso-bidi-font-style: normal">n</i>-butanol in the HLB interfacial layer, the coordinates of the start and end points of the middle phase microemulsion, the mass fractions of APG and <i style="mso-bidi-font-style:normal">n</i>-butanol in the total system, and the solubilities of APG and <i style="mso-bidi-font-style:normal">n</i>-butanol in oil phase are calculated. The washing liquids prepared according to the physicochemical parameters of the <i style="mso-bidi-font-style:normal">n</i>-dodecyl polyglucoside based middle-phase microemulsion have been used to wash the NAPLs adsorbed on soil. The results indicate that the APG based middle phase microemulsion is suitable in surfactant-enhanced aquifer remediation. Page(s): 873-878

2013-07-01T00:00:00Z Guo, Jinxue Sun, Yanfang Zhang, Xiao Zhu, Hongtao Tang, Lin http://nopr.niscpr.res.in/handle/123456789/19629 2013-07-12T16:37:05Z 2013-07-01T00:00:00Z

Title: <span style="font-size:11.0pt;font-family: "Times New Roman";mso-fareast-font-family:"Times New Roman";mso-bidi-font-family: Mangal;mso-ansi-language:EN-GB;mso-fareast-language:EN-US;mso-bidi-language: HI" lang="EN-GB">Preparation of Pt/CeO₂-ZrO₂/carbon nanotubes hybrid catalysts for methanol electrooxidation</span> Authors: Guo, Jinxue; Sun, Yanfang; Zhang, Xiao; Zhu, Hongtao; Tang, Lin Abstract: Pt/CeO₂-ZrO₂/multi-walled carbon nanotubes composites have been synthesized for the application of catalyst in direct methanol fuel cells. The introduction of CeO₂-ZrO₂, which has high surface area and oxygen storage capacity, can eliminate the toxic gases at low temperature. Electrocatalytic activity and stability of Pt/CeO₂-ZrO₂/MWCNT catalysts for methanol oxidation have been investigated with cyclic voltammetric and chronoamperometric techniques. Electrochemical measurements demonstrate that the Pt/CeO₂-ZrO₂/MWCNT catalysts exhibit superior electrocatalytic activities as compared with Pt/CeO₂/MWCNT and Pt/MWCNT catalysts. The peak current density of Pt/CeO₂-ZrO₂/MWCNT catalysts for methanol electrooxidation is 3.9 times as high as that of Pt/MWCNT catalysts. The outstanding performance is likely to be due to the co-catalytic effect of CeO₂-ZrO₂ and the deposition manner of Pt nanoparticles. Page(s): 868-872

2013-07-01T00:00:00Z Das, Debasis Maiti, Pali Bagdi, Avik Kr Ghosh, Totan Chattopadhay, Tanmay Das, Sudhanshu Hajra, Alakananda Majee, Adinath Zangrando, Ennio http://nopr.niscpr.res.in/handle/123456789/19628 2013-07-15T16:37:28Z 2013-07-01T00:00:00Z

Title: Synthesis, structure and catalytic aspects of the palladium(II) complex [PdLCl] (where LH = 2-formyl-4-methyl-6-N-ethylpiperidineiminomethylphenol) Authors: Das, Debasis; Maiti, Pali; Bagdi, Avik Kr; Ghosh, Totan; Chattopadhay, Tanmay; Das, Sudhanshu; Hajra, Alakananda; Majee, Adinath; Zangrando, Ennio Abstract: A square planar neutral Pd(II) complex, [PdLCl], of the Schiff base ligand, 2-formyl-4-methyl-6-N-ethylpiperidineimino methylphenol, has been synthesized and structurally characterized. The complex has been employed as catalyst precursor for the synthesis of ynones by coupling acyl chlorides with terminal alkynes under copper- and solvent-free conditions at room temperature. Page(s): 863-867

2013-07-01T00:00:00Z