02464nas a2200229 4500008004100000022001400041245009900055210006900154260007800223300001100301490000700312520162300319653001901942653002501961653001901986653002002005653001302025653002202038100002502060700002202085856012702107 2012 eng d a1944-399400aTransport of inorganic acids through polybenzimidazole (PBI) based membranes by chemo-dialysis0 aTransport of inorganic acids through polybenzimidazole PBI based a36 WALCOTT VALLEY DRIVE,, HOPKINTON, MA 01748 USAbDESALINATION PUBLcJAN a96-1030 v383 a

A process of chemo-dialysis involving poly(benzimidazole) (PBI) as a chemically active membrane material is proposed for the transport of inorganic acids. These membranes possessing basic nature selectively bind acid molecules present in the feed solution due to acid-base interactions. They are transported across the membrane by concentration gradient as the driving force. The transported acid molecules are stripped away from other side of the membrane surface by a suitable stripping agent or water. Effects of nature of feed acid (pK(a), molecular size), its concentration in the feed solution and the nature of stripping agent (base or water) on acid transport properties are presented. Membranes showed appreciable transport rates for three acids, viz., H2SO4, HCl and HNO3. The fluxes for different acids varied from 16.1 to 140.7 g/m(2) h under different operating conditions. Most significantly, there was no transport of non-acidic solutes such as NaCl or glucose. This could be made possible since these solutes neither get sorbed in the membrane matrix, nor does the membrane exhibit any porosity for the transport to occur through pores. This resulted in practically infinite selectivity of transported acid over the non-acidic solutes. Use of water as the stripping agent allows recycling of the acid, making the process economically attractive. Moreover, possible recovery of acid and its reuse eliminated the requirement of acid neutralization and disposal; which is a routine practice followed today. Thus, this process of chemo-dialysis is economically attractive and environmentally benign.

10aAcid transport10aChemical interaction10aChemo-dialysis10aInorganic acids10aMembrane10aPolybenzimidazole1 aChendake, Yogesh, J.1 aKharul, Ulhas, K. uhttp://library.ncl.res.in/content/transport-inorganic-acids-through-polybenzimidazole-pbi-based-membranes-chemo-dialysis-000626nas a2200181 4500008004100000022001400041245008700055210006900142260000800211300001000219490000700229653000800236653001300244653002200257100002800279700002000307856011700327 2014 eng d a2053-273300aSulfonic acid loaded self-standing covalent organic membrane for proton conduction0 aSulfonic acid loaded selfstanding covalent organic membrane for  cMAY aC11500 v7010aCOF10aMembrane10aproton conduction1 aSasmal, Himadri, Sekhar1 aBanerjee, Rahul uhttp://library.ncl.res.in/content/sulfonic-acid-loaded-self-standing-covalent-organic-membrane-proton-conduction02236nas a2200241 4500008004100000022001400041245011700055210006900172260000800241520140600249653002001655653001701675653001801692653001901710653001301729100002101742700002201763700001701785700002001802700001801822700002401840856013001864 2019 eng d a0887-358500aIn vitro and in silico studies on membrane interactions of diverse Capsicum annuum flower gamma-thionin peptides0 aIn vitro and in silico studies on membrane interactions of diver cAUG3 a

Thionins are small, cysteine-rich peptides that play an important role in plant defense, primarily through their interactions with membranes. Eight novel gamma-thionin peptides (CanThio1-8) were isolated from the flower of Capsicum annuum. Sequence analysis revealed that the peptides cluster into three groups. A representative peptide from each group (CanThio1, 2, and 3) was used for experimental characterization. Interestingly, peptides were found to possess some cytotoxic activity against normal human embryonic kidney cell line but higher cytotoxicity against cancer cell line MCF-7. CanThio3 peptide was chosen as a representative peptide to study the molecular mechanism of action on membranes. Microsecond timescale atomistic simulations of CanThio3 were performed in the presence of a POPC (1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine) lipid bilayer. Simulations revealed that CanThio3 interacts with the bilayer and causes lipid thinning in the vicinity. Nonpolar amino acids specific to the alpha-core region of CanThio3 along with nonpolar residues in the gamma-core region are seen to interact with the lipid tails. The differences in the amino acid sequence of CanThio peptides in these regions explain the variability in cytotoxic activities. In summary, our results demonstrate the membrane-mediated activity of a novel series of gamma-thionin peptides from C. annuum.

10aCapsicum annuum10aCytotoxicity10agamma-thionin10aMD simulations10aMembrane1 aNikte, Siddhanta1 aGahankari, Apurva1 aMulla, Javed1 aSengupta, Durba1 aJoshi, Manali1 aTamhane, Vaijayanti uhttp://library.ncl.res.in/content/vitro-and-silico-studies-membrane-interactions-diverse-capsicum-annuum-flower-gamma-thionin01966nas a2200241 4500008004100000022001400041245009100055210006900146260000800215300001100223490000700234520119300241653001701434653001301451653001901464653001501483653001501498100002301513700002401536700002301560700002701583856011401610 2019 eng d a2214-714400aSeparation of nitroaromatics from wastewater by using supported ionic liquid membranes0 aSeparation of nitroaromatics from wastewater by using supported  cDEC a1009250 v323 a

Nitroaromatics have been released into wastewater during its production and application, thus, contaminating the ecosystem. The stringent discharge limits of industrial effluents have led to the development of sustainable technologies for removal of nitroaromatics from wastewater. In the present investigation, separation of nitroaromatic compounds such as TNT, TNP and Tetryl from model wastewater was investigated by using supported ionic liquid membrane (SILM) process. Various aliquat 336 based ionic liquids (ILs) were synthesised and characterized, and immobilized in PTFE and PVDF supports for the preparation of SILMs. The key parameters such as type of IL and striping phase, feed phase pH, selectivity for SILM, extraction kinetics and reuse of SILM were studied, in detail. The size of IL-anion plays an important role in removal process. The SILM was found to be selective for TNP over other nitroaromatics. Maximum separation of TNP (< 95%) was achieved with IL, [A336][SCN] within 12 h. Selectivity and reuse of the membrane indicate the potential of SILM technology as a sustainable chemical process for the treatment of nitroaromatics contaminated wastewater.

10aIonic liquid10aMembrane10aNitroaromatics10aSeparation10awastewater1 aBhosale, Vikas, K.1 aChana, Harpreet, K.1 aKamble, Sanjay, P.1 aKulkarni, Prashant, S. uhttp://library.ncl.res.in/content/separation-nitroaromatics-wastewater-using-supported-ionic-liquid-membranes