02016nas a2200277 4500008004100000022001400041245011600055210006900171260009900240300001400339490000800353520100300361653002801364653001501392653001701407653003201424100001801456700002201474700001401496700001701510700001601527700002101543700002101564700002601585856012701611 2010 eng d a0960-852400aFlocculation of dimorphic yeast benjaminiella poitrasii is altered by modulation of NAD-glutamate dehydrogenase0 aFlocculation of dimorphic yeast benjaminiella poitrasii is alter aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLANDbELSEVIER SCI LTDcFEB a1393-13950 v1013 a

A strategy to control flocculation is investigated using dimorphic yeast, Benjaminiella poitrasii as a model. Parent form of this yeast (Y) exhibited faster flocculation (11.1 min) than the monomorphic yeast form mutant Y-5 (12.6 min). Atomic force microscopy revealed higher surface roughness of Y (439.34 rms) than Y-5 (52 rms). Also, the former had a zeta potential of -65.97 +/- 3.45 as against -50.21 +/- 2.49 for the latter. Flocculation of both Y and Y-5 could be altered by supplementing either substrates or inhibitor of NAD-glutamate dehydrogenase (NAD-GDH) in the growth media. The rate of flocculation was promoted by alpha-ketoglutarate or isophthalic acid and decelerated by glutamate with a statistically significant inverse correlation to corresponding NAD-GDH levels. These interesting findings open up new possibilities of using NAD-GDH modulating agents to control flocculation in fermentations for easier downstream processing. (C) 2009 Elsevier Ltd. All rights reserved.

10aBenjaminiella poitrasii10adimorphism10aflocculation10aNAD-glutamate dehydrogenase1 aJoshi, C., V.1 aGhormade, Vandana1 aKunde, P.1 aKulkarni, P.1 aMamgain, H.1 aBhat, Suresh, K.1 aPaknikar, K., M.1 aDeshpande, Mukund, V. uhttps://library.ncl.res.in/content/flocculation-dimorphic-yeast-benjaminiella-poitrasii-altered-modulation-nad-glutamate-002098nas a2200265 4500008004100000022001400041245011800055210006900173260009900242300001200341490000700353520112100360653001701481653002001498653001801518653002101536653002601557653001301583100002501596700001601621700002601637700002101663700001701684856013101701 2010 eng d a0144-861700aFree radical graft copolymerization of N-vinyl-2-pyrrolidone onto k-carrageenan in aqueous media and applications0 aFree radical graft copolymerization of Nvinyl2pyrrolidone onto k aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLANDbELSEVIER SCI LTDcSEP a424-4310 v823 a

In the present article, the graft copolymer of k-carrageenan with N-vinyl-2-pyrrolidone (NVP) has been synthesized using PMS/maleic acid as a redox initiator in aqueous medium and reaction conditions have been optimized to obtain maximum % grafting ratio (%G). The optimum conditions of maximum grafting have been found by varying the different parameters. On increasing the concentration of maleic acid and peroxymonosulphate from 1.6 x 10(-3) to 4.8 x 10(-3) mol dm(-3) and 0.6 x 10(-2) to 2.2 x 10(-2) mol dm(-3) respectively, the initially grafting parameters increased and after a certain range of concentration grafting parameters showed decreasing trend. The small increment of concentration in hydrogen ion causes increment in percentage grafting. It was observed that the grafting parameters increase as the concentration of N-vinyl-2-pyrrolidone increases up to 16 x 10(-2) mol dm(-3) after that it decreased. The optimum condition for maximum grafting has obtained at concentration 1.0 g dm(-3) of k-carrageenan at 40 degrees C and 120 min, respectively. (C) 2010 Elsevier Ltd. All rights reserved.

10aflocculation10aGraft copolymer10ak-Carrageenan10aMetal ion uptake10aN-vinyl-2-pyrrolidone10aswelling1 aMishra, Madan, Mohan1 aSand, Arpit1 aMishra, Dinesh, Kumar1 aYadav, Mithilesh1 aBehari, Kunj uhttps://library.ncl.res.in/content/free-radical-graft-copolymerization-n-vinyl-2-pyrrolidone-k-carrageenan-aqueous-media-and-002196nas a2200241 4500008004100000022001400041245012300055210006900178260007600247300001400323490000800337520130900345653001701654653001701671653002001688653002101708653001301729100001601742700002101758700002601779700001701805856013201822 2011 eng d a0021-899500aAlginic acid-g-poly(N-vinylformamide) graft copolymer: synthesis, characerization, swelling, and flocculation property0 aAlginic acidgpolyNvinylformamide graft copolymer synthesis chara aCOMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USAbWILEY-BLACKWELLcAUG a1400-14070 v1213 a

The graft copolymer of N-vinylformamide with alginic acid was synthesized by free radical polymerization using potassium peroxymonosulphate and thiourea as redox pair in inert atmosphere. The optimum conditions for maximum grafting have been determined by varying the concentrations of N-vinylformamide, potassium peroxymonosulphate, thiourea, sulfuric acid, alginic acid as well as time duration and temperature. The grafting parameters increase up to the certain concentrations of N-vinylformamide, potassium peroxymonosulhate, thiourea, and hydrogen ion while thereafter grafting parameters decrease. The effect of alginic acid concentration on grafting parameters has been observed to decrease continuously. It has also been found that grafting parameters increase up to certain time and temperature, respectively, and thereafter decrease. The swelling properties of graft copolymer in terms of swelling ratio and percent swelling are investigated. Flocculation property of pure and grafted sample for both coking and noncoking coals is also investigated for the treatment of coal mine waste water. The graft copolymer has been characterized by Fourier transform infrared spectroscopy as well as thermogravimetic analysis. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci 121: 1400-1407, 2011

10aalginic acid10aflocculation10aGraft copolymer10aN-vinylformamide10aswelling1 aSand, Arpit1 aYadav, Mithilesh1 aMishra, Dinesh, Kumar1 aBehari, Kunj uhttps://library.ncl.res.in/content/alginic-acid-g-polyn-vinylformamide-graft-copolymer-synthesis-characerization-swelling-and-002328nas a2200253 4500008004100000022001400041245006700055210006700122260007100189300001400260490000600274520150100280653001601781653001601797653002301813653001701836653001401853100001701867700003201884700002401916700001301940700002201953856009901975 2016 eng d a2168-048500aGreen approach to dye wastewater treatment using biocoagulants0 aGreen approach to dye wastewater treatment using biocoagulants a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcMAY a2495-25070 v43 a

The present study focuses on newer biocoagulants, bioformulations, and the understanding of coagulant behavior with biocoagulants in relation to chemical coagulants. Newer biocoagulants, seeds of Azadirachta indica (AI) and pads of Acanthocereus tetragonus, are discussed along with two known biocoagulants, Moringa oleifera and Cicer arietinum seeds. Dye removal studies were carried out using widely reported Congo red dye to facilitate easy comparison with other conventional coagulants and the effect of various parameters such as initial dye concentration, pH, coagulant dose, etc. are discussed in detail. The use of biocoagulant was found to be highly effective, and up to 99% dye removal was achieved for coagulant doses in the range of 300-1500 mg/L. It was also observed that coagulation is pH sensitive, similar to chemical coagulants. Although the biocoagulant dose is relatively higher than the conventional chemical coagulants, a good value for the sludge volume index, similar to 50 mL/g for 1 h and 30 min, respectively, was obtained for the two coagulants, Acanthocereus tetragonus and Moringa oleifera. A very high particle count compared to chemical coagulants was observed using a focused beam reflectance measurement. Bioformulation with chemical coagulants such as alum, ferric, and aluminum based coagulants can, not only lower doses of biocoagulants (up to one-third) but can also result in significant improvement in the coagulation performance, up to 50% or more.

10acoagulation10adye removal10aEffluent treatment10aflocculation10apollution1 aChethana, M.1 aSorokhaibam, Laxmi, Gayatri1 aBhandari, Vinay, M.1 aRaja, S.1 aRanade, Vivek, V. uhttps://library.ncl.res.in/content/green-approach-dye-wastewater-treatment-using-biocoagulants