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Narendra Pal Singh Chauhan,Masoud Mozafari,Narendra Singh Chundawat,Kiran Meghwal,Rakshit Ameta,Suresh C. Ameta 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.36 No.-
A simple electrochemical reduction procedure can be applied to nanostructured composite films ofpolyaniline (PANI) and graphene oxide (GO), which results conversion of GO into reduced GO (rGO) withimproved electroactivity of the PANI composite films. These also suffer from certain drawbacks likecyclic stability and lesser electrochemical properties. Three-dimensional hollow balls of graphene/polyaniline (3D-HBGP) hybrid and poly(methyl methacrylate) (PMMA)/polyaniline, sulfonatedgraphene/polyaniline (SG/PANI) and colloidal graphene oxide/polyaniline (PANI CGO) with high energydensity 24.3 W h kg 1 and power density 28.1 kW kg 1 are good candidates for this purpose. This reviewsummarizes developmental stage of different nanocomposites based on graphene and polyaniline.
Sangeeta Kalal,Pinki Bala Punjabi,Narendra Pal Singh Chauhan,Noopur Ameta,Rakshit Ameta,Sudhish Kumar 한국화학공학회 2014 Korean Journal of Chemical Engineering Vol.31 No.12
The heterogeneous photo-Fenton like process is a green chemical pathway. It has an edge over conven-tional Fenton and photo-Fenton processes as it does not require the removal of ferrous/ferric ions in the form of sludge. We prepeared copper pyrovanadate or Volborthite (Cu3V2(OH)2O7·2H2O) composite photocatalyst by wet chemicalmethod. The photocatalyst was characterized by SEM, XRD, IR, TGA/DSC, EDX and BET. Experiments demon-strated that catalyst could effectively catalyze degradation of neutral red and azure-B in presence of H2O2 in visiblelight. Moreover, the photo-Fenton-like catalytic activity of Cu3V2(OH)2O7·2H2O was much higher than CuO and V2O5,when used alone as photocatalyst. The effect of variation of different parameters, i.e., pH, amount of photocatalyst,concentration of dye, amount of H2O2 and light intensity was also investigated. The degradation was well fitted underpseudo-first-order reaction with a rate constant of 2.081×10−4sec−1and 3.876×10−4sec−1for neutral red and azure-B,respectively. Quality parameters of dye solutions before and after photo-Fenton degradation were also determined. Atentative mechanism involving•OH radical as an oxidant has been proposed. The high catalytic activity may be dueto the Cu3V2(OH)2O7·2H2O shell, which not only increased the surface hydroxyl groups, but also enhanced the interfacialelectron transfer. The catalyst has been found to possess good recyclability.
Altering Conidial Dispersal of Alternaria solani by Modifying Microclimate in Tomato Crop Canopy
Jambhulkar, Prashant Prakash,Jambhulkar, Nitiprasad,Meghwal, Madanlal,Ameta, Gauri Shankar The Korean Society of Plant Pathology 2016 Plant Pathology Journal Vol.32 No.6
Early blight of tomato caused by Alternaria solani, is responsible for severe yield losses in tomato. The conidia survive on soil surface and old dry lower leaves of the plant and spread when suitable climatic conditions are available. Macroclimatic study reveals that highest inoculum concentration of Alternaria spores appeared in May 2012 to 2013 and lowest concentration during January 2012 to 2013. High night temperature positively correlated and significantly (P < 0.01) involved in conidial spore dispersal and low relative humidity (RH) displayed significant (P < 0.05) but negative correlation with conidial dispersal. The objective of the study was to modify microclimatic conditions of tomato crop canopy which may hamper conidial dispersal and reduce disease severity. We evaluated effect of marigold intercropping and plastic mulching singly and in consortia on A. solani conidial density, tomato leaf damage and microclimatic parameters as compar to tomato alone (T). Tomato-marigold intercropping-plastic mulching treatment (T + M + P) showed 35-39% reduction in disease intensity as compared to tomato alone. When intercropped with tomato, marigold served as barrier to conidial movement and plastic mulching prevented evapotranspiration and reduced the canopy RH that resulted in less germination of A. solani spores. Marigold intercropping and plastic mulching served successfully as physical barrier against conidial dissemination to diminish significantly the tomato foliar damage produced by A. solani.
Mehta, Sarika,Swarnkar, Neelam,Vyas, Madhuri,Vardia, Jitendra,Punjabi, Pinki B.,Ameta, Suresh C. Korean Chemical Society 2007 Bulletin of the Korean Chemical Society Vol.28 No.12
Under the framework of green chemistry, an efficient and extremely fast procedure for the synthesis of 5a-h through four-step procedure starting from 2-arylidenetetralin-1-one 1a-d under microwave irradiation is described. A considerable increase in the reaction rate has been observed with better yield. The structures of the synthesized compounds have been characterized on the basis of their elemental analysis and spectral data. Synthesized compounds 5a-h was evaluated for their antimicrobial activity. Some of the compounds exhibited appreciable activity.
Altering Conidial Dispersal of Alternaria solani by Modifying Microclimate in Tomato Crop Canopy
Prashant Prakash Jambhulkar,Nitiprasad Jambhulkar,Madanlal Meghwal,Gauri Shankar Ameta 한국식물병리학회 2016 Plant Pathology Journal Vol.32 No.6
Early blight of tomato caused by Alternaria solani, isresponsible for severe yield losses in tomato. The conidiasurvive on soil surface and old dry lower leavesof the plant and spread when suitable climatic conditionsare available. Macroclimatic study reveals thathighest inoculum concentration of Alternaria sporesappeared in May 2012 to 2013 and lowest concentrationduring January 2012 to 2013. High night temperaturepositively correlated and significantly (P <0.01) involved in conidial spore dispersal and low relativehumidity (RH) displayed significant (P < 0.05)but negative correlation with conidial dispersal. Theobjective of the study was to modify microclimaticconditions of tomato crop canopy which may hamperconidial dispersal and reduce disease severity. Weevaluated effect of marigold intercropping and plasticmulching singly and in consortia on A. solani conidialdensity, tomato leaf damage and microclimatic parametersas compar to tomato alone (T). Tomato-marigoldintercropping–plastic mulching treatment (T + M +P) showed 35–39% reduction in disease intensity ascompared to tomato alone. When intercropped withtomato, marigold served as barrier to conidial movementand plastic mulching prevented evapotranspirationand reduced the canopy RH that resulted in lessgermination of A. solani spores. Marigold intercroppingand plastic mulching served successfully as physicalbarrier against conidial dissemination to diminishsignificantly the tomato foliar damage produced by A. solani.
Sarika Mehta,Neelam Swarnkar,Madhuri Vyas,Jitendra Vardia,Pinki B. Punjabi,Suresh C. Ameta* 대한화학회 2007 Bulletin of the Korean Chemical Society Vol.28 No.12
Under the framework of green chemistry, an efficient and extremely fast procedure for the synthesis of 5a-h through four-step procedure starting from 2-arylidenetetralin-1-one 1a-d under microwave irradiation is described. A considerable increase in the reaction rate has been observed with better yield. The structures of the synthesized compounds have been characterized on the basis of their elemental analysis and spectral data. Synthesized compounds 5a-h was evaluated for their antimicrobial activity. Some of the compounds exhibited appreciable activity.