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Promising ZnO-based DSSC performance using HMP molecular dyes of high extinction coefficients
Ganesh, T.,Nguyen, Hong-Minh,Mane, Rajaram S.,Kim, Nakjoong,Shinde, Dipak V.,Bhande, Sambhaji S.,Naushad, Mu.,Hui, K. N.,Han, Sung Hwan The Royal Society of Chemistry 2014 Dalton Transactions Vol.43 No.29
<P>Employing newly synthesized di-substituted tri-phenyl amine (HMP-9) and carbazole (HMP-11) dyes (with limited acidic carboxyl anchor groups), a power conversion efficiency as high as 7.03% in ZnO nanocrystallite (NC)-based dye-sensitized solar cells (DSSCs) is achieved. The specific molecular designs of HMP-09 and HMP-11 consisting of with and without hexyloxy spacer groups, and added tri-phenyl amine or 9-phenyl-9<I>H</I>-carbazole donor groups, respectively, attached on the ancillary ligands are advantageous, evidenced from electrochemical impedance spectroscopy measurements, for ZnO NC-based DSSCs.</P> <P>Graphic Abstract</P><P>Employing newly synthesized di-substituted tri-phenyl amine (HMP-9) and carbazole (HMP-11) dyes, a power conversion efficiency as high as 7.03% in ZnO nanocrystallite-based dye-sensitized solar cells under AM 1.5 G illumination is achieved. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c4dt01179a'> </P>
Ganesh, M.,Aziz, A.S.,Ubaidulla, U.,Hemalatha, P.,Saravanakumar, A.,Ravikumar, R.,Peng, M.M.,Choi, E.Y.,Jang, H.T. THE KOREAN SOCIETY OF INDUSTRIAL AND ENGINEERING 2016 JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY -S Vol.39 No.-
<P>Novel silver nanoparticles-decorated chitosan (CS)-polyvinyl alcohol (PVA) composite electrospun nanofibers, loaded with sulfanilamide for enhanced wound healing have been developed. Herein, formic acid was used as a reducing agent to produce in situ colloidal silver nanoparticles (AgNPs) in the composite polymeric solution with the active agent sulfanilamide. The prepared electrospun fibers were characterized using scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction, ultraviolet spectroscopy, and thermal gravimetric analysis (TG). Further, in vitro release, antimicrobial properties and in vivo wound healing activity were evaluated. The results revealed that the composite fibers displayed a synergistic antibacterial and wound healing activities. (C) 2016 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.</P>
Saratale, Ganesh D,Kshirsagar, Siddheshwar D,Sampange, Vilas T,Saratale, Rijuta G,Oh, Sang-Eun,Govindwar, Sanjay P,Oh, Min-Kyu Humana Press 2014 Applied biochemistry and biotechnology Vol.174 No.8
<P>Phanerochaete chrysosporium was evaluated for cellulase and hemicellulase production using various agricultural wastes under solid state fermentation. Optimization of various environmental factors, type of substrate, and medium composition was systematically investigated to maximize the production of enzyme complex. Using grass powder as a carbon substrate, maximum activities of endoglucanase (188.66 U/gds), exoglucanase (24.22 U/gds), cellobiase (244.60 U/gds), filter paperase (FPU) (30.22 U/gds), glucoamylase (505.0 U/gds), and xylanase (427.0 U/gds) were produced under optimized conditions. The produced crude enzyme complex was employed for hydrolysis of untreated and mild acid pretreated rice husk. The maximum amount of reducing sugar released from enzyme treated rice husk was 485 mg/g of the substrate. Finally, the hydrolysates of rice husk were used for hydrogen production by Clostridium beijerinckii. The maximum cumulative H2 production and H2 yield were 237.97 mL and 2.93 mmoL H2/g of reducing sugar, (or 2.63 mmoL H2/g of cellulose), respectively. Biohydrogen production performance obtained from this work is better than most of the reported results from relevant studies. The present study revealed the cost-effective process combining cellulolytic enzymes production under solid state fermentation (SSF) and the conversion of agro-industrial residues into renewable energy resources.</P>
Knowledge and Risk Perceptions of Occupational Infections Among Health-care Workers in Malaysia
Subramanian, Ganesh Chidambar,Arip, Masita,Subramaniam, T.S. Saraswathy Occupational Safety and Health Research Institute 2017 Safety and health at work Vol.8 No.3
Health-care workers are at risk of exposure to occupational infections with subsequent risk of contracting diseases, disability, and even death. A systematic collection of occupational disease data is useful for monitoring current trends in work situations and disease exposures; however, these data are usually limited due to under-reporting. The objective of this study was to review literature related to knowledge, risk perceptions, and practices regarding occupational exposures to infectious diseases in Malaysian health-care settings, in particular regarding blood-borne infections, universal precautions, use of personal protective equipment, and clinical waste management. The data are useful for determining improvements in knowledge and risk perceptions among health-care workers with developments of health policies and essential interventions for prevention and control of occupational diseases.
Bhagiyalakshmi, M.,Hemalatha, P.,Ganesh, M.,Peng, M.M.,Jang, H.T. Korean Society of Industrial and Engineering Chemi 2011 Journal of industrial and engineering chemistry Vol.17 No.3
Copper-encapsulated heteropolyacid-impregnated mesoporous MCM-48 (Cu-HPA-MCM-48) with copper in a reduced state was synthesized, and the CO<SUB>2</SUB> adsorption capacity was monitored. The synthesized material was characterized by XRD, N<SUB>2</SUB> adsorption-desorption, FT-IR, DSC, CO<SUB>2</SUB>-TPD and XPS. The low angle X-ray diffraction pattern of the Cu-HPA-MCM-48 demonstrates the encapsulation of copper inside the pore by the disappearance of higher-order peaks. This result is further supported by the presence of Cu<SUB>2p</SUB><SUP>3</SUP> and W<SUB>4f</SUB> peaks in XPS. The CO<SUB>2</SUB> adsorption capacity of Cu-HPA-MCM-48 was 70mg/g at 25<SUP>o</SUP>C. The energy of desorption and the heat of the reaction (ΔHr) were 21.2kJ/mol and 490Btu/lb, respectively, as determined by CO<SUB>2</SUB>-TPD and DSC. As the ΔHr value of Cu-HPA-MCM-48 approaches the CO<SUB>2</SUB> benchmark value (580Btu/lb), the catalyst exhibited improved CO<SUB>2</SUB> capturing capacity.
Role of ceria in CO<sub>2</sub> adsorption on NaZSM-5 synthesized using rice husk ash
Hemalatha, P.,Bhagiyalakshmi, M.,Ganesh, M.,Palanichamy, M.,Murugesan, V.,Jang, H.T. Korean Society of Industrial and Engineering Chemi 2012 Journal of industrial and engineering chemistry Vol.18 No.1
Ceria (3, 5, 7, 11, 19wt%) impregnated NaZSM-5 was synthesized and studied for adsorption of CO<SUB>2</SUB>. They were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDS), CO<SUB>2</SUB>-temperature programmed desorption (CO<SUB>2</SUB>-TPD) and Brunauer-Emmett-Teller (BET) techniques. The heat of the reaction (ΔH<SUB>r</SUB>) derived from differential scanning calorimetry (DSC) analysis was 490Btu/lb. XRD analysis showed a decrease in the intensity of patterns with the increase in the ceria loading but crystallization of ceria to larger size was clearly evident for 11 and 19% loading. The surface area decreased for 3 and 5% loading, but increased for 7, 11 and 19% loading illustrating difference in dispersion. The maximum adsorption capacity of CeO<SUB>2</SUB>(5%)/NaZSM-5 was 130mg/g of sorbent. Extraction of silica from the agricultural waste, rice husk, and its use in the zeolite synthesis was an advantage in this study. Hence, from the study it was concluded that ceria impregnated NaZSM-5 could be treated as a novel material for CO<SUB>2</SUB> adsorption, as they were regenerable and recyclable. This study can also be applied to all other zeolites.