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Pant, H.R.,Kim, H.J.,Joshi, M.K.,Pant, B.,Park, C.H.,Kim, J.I.,Hui, K.S.,Kim, C.S. Elsevier Scientific Pub. Co 2014 Journal of hazardous materials Vol.264 No.-
A stable silver-doped fly ash/polyurathene (Ag-FA/PU) nanocomposite multifunctional membrane is prepared by a facile one-step electrospinning process using fly ash particles (FAPs). Colloidal solution of PU with FAPs and Ag metal precursor was subjected to fabricate nanocomposite spider-web-like membrane using electrospinning process. Presence of N,N-dimethylformamide (solvent of PU) led to reduce silver nitrate into Ag NPs. Incorporation of Ag NPs and FAPs through electrospun PU fibers is proven through electron microscopy and spectroscopic techniques. Presence of these NPs on PU nanofibers introduces several potential physicochemical properties such as spider-web-like nano-neeting for NPs separation, enhanced absorption capacity to remove carcinogenic arsenic (As) and toxic organic dyes, and antibacterial properties with reduce bio-fouling for membrane filter application. Preliminary observations used for above-mentioned applications for water treatment showed that it will be an economically and environmentally friendly nonwoven matrix for water purification. This simple approach highlights new avenues about the utilization of one pollutant material to control other pollutants in scalable and inexpensive ways.
Lee, C.,Pant, B.,Kim, B.S.,Jang, R.S.,Park, S.,Park, M.,Park, S.J.,Kim, H.Y. North-Holland 2017 Materials letters Vol.207 No.-
In this work, we report a fabrication of photoluminescent carbon dots (C-dots) incorporated keratin/poly (vinyl alcohol) (keratin/PVA) hydrogel via an electron beam irradiation technique. Hydrogels with porous structure along with homogeneous networks were obtained by this ecofriendly approach. The prepared hydrogels showed excitation dependant photoluminescent (PL) emission similar to the C-dots. The well preserved quantum confinement effect of the C-dots in the hydrogel can extend its application to biological analysis and medical diagnosis in the future.
Fixed Point Theorems for Expansion Mappings on Probabilistic Metric Spaces
Singh, S . L .,Pant, B . D .,Dimri, R . C . 호남수학회 1987 호남수학학술지 Vol.9 No.1
In this paper we introduce the notion of expansion mapping on a probabilistic metric space and grove common fixed point theorems for a pair of such mappings. These results being new of their kind, are interesting generalizations of some of the known results.
Lee, S.,Kim, S.T.,Pant, B.R.,Kwen, H.D.,Song, H.H.,Lee, S.K.,Nehete, S.V. Elsevier 2010 Journal of chromatography Vol.1217 No.27
Asymmetrical flow field-flow fractionation (AsFlFFF) was coupled online with multiangle light scattering (MALS) to study the changes in the molecular weight and the size distribution of the corn starch during carboxymethylation. A corn starch was derivatized with sodium chloroacetate in alcoholic medium under alkaline condition to produce carboxymethyl starches (CMS) having various degrees of substitution (DS). The change in thermal characteristics and granule structure of the native corn starch and CMS were compared using Thermogravimetric analysis and scanning electron microscope. The ionic strength of the carrier liquid (water with 0.02% NaN<SUB>3</SUB>) was optimized by adding 50mM NaNO<SUB>3</SUB> to minimize the interactions among the starch molecules and between the starch molecules and the AsFlFFF membrane. A field-programmed AsFlFFF allowed determination of the molecular weight distribution (MWD) of starches within about 25min. It was found that carboxymethylation of starch results in reduction in the molecular weight due to molecular degradation by the alkaline treatment. The weight-average molecular weight (M<SUB>w</SUB>) was reduced down to about 4.4x10<SUP>5</SUP> from about 7.2x10<SUP>6</SUP> when DS was 0.14. It seems AsFlFFF coupled with MALS (AsFlFFF/MALS) is a useful tool for monitoring the changes taking place in the molecular weight and the size of starch during derivatization.