Electronic structure and electrical transport properties of LaCo_1−xNi_xO₃(0 ≤ x ≤0.5)

Kumar, Vinod,Kumar, Rajesh,Shukla, D. K.,Gautam, Sanjeev,Hwa Chae, Keun,Kumar, Ravi American Institute of Physics 2013 JOURNAL OF APPLIED PHYSICS - Vol.114 No.7

Efficacy of Newer Molecules, Bioagents and Botanicals against Maydis Leaf Blight and Banded Leaf and Sheath Blight of Maize

Vinod Kumar Malik,Manjeet Singh,Karambir Singh Hooda,Naresh Kumar Yadav,Prashant Kumar Chauhan 한국식물병리학회 2018 Plant Pathology Journal Vol.34 No.2

Maize (Zea mays L.; 2N=20) is major staple food crop grown worldwide adapted to several biotic and abiotic stresses. Maydis leaf blight (MLB) and banded leaf and sheath blight (BLSB) are serious foliar fungal diseases may cause up to 40% and 100% grain yield loss, respectively. The present studies were undertaken to work out the efficacy of chemicals, botanicals and bioagents for the management of MLB and BLSB under field condition for two seasons Kharif 2014 and 2015. Five molecules (propiconazole 25 EC, hexaconazole 25 EC, carbendazim 50 WP, mancozeb 75 WP and carbedazim 12 WP + mancozeb 63 WP), two bioagents i.e. Trichoderma harzianum and T. viridae and three botanicals namely azadirachtin, sarpagandha and bel pathar were tested for their efficacy against MLB. Eight newer fungicides viz., difenconazole 250 SC, hexaconazole 5 EC, carbendazim 50WP, validamycin 3 L, tebuconazole 250 EC, trifloxystrobin 50 WG + tebuconazole 50 WG, azoxystrobin 250 EC and pencycuron 250 SC were evaluated against BLSB. Analysis revealed significant effects of propiconazole at 0.1%, carbendazim 12 WP + mancozeb 63 WP at 0.125% and sarpagandha leaves at 10% against MLB pathogen, whereas validamycin at 0.1% and trifloxystrobin 25 WG + tebuconazole 50 WG at 0.05% were found effective against BLSB. The slow rate of disease control virtually by the bioagents might have not shown instant effect on plant response to the yield enhancing components. The identified sources of management can be used further in strengthening the plant protection in maize against MLB and BLSB.

Automatic procedures analyzing remote sensing data to minimize flood response time: a step towards National flood mapping service

Vinod Kumar Sharma,G. Srinivasa Rao,C. M. Bhatt,Abhinav Kumar Shukla,Ashish Kumar Mishra,V. Bhanumurthy 대한공간정보학회 2017 Spatial Information Research Vol.25 No.5

Value added flood products helps decision makers in an efficient relief and rescue operations. On time availability of flood products, may help decision makers, in early decision making. Indian monsoon causes floods in several Indian states at a time, every year. Mapping multiple states at a time needs lot of man power and expertise. Manual flood mapping process is a time consuming process. Automatic procedures, for delineating flood and generation of value added products from satellite images can reduce the critical time-span. In the present study, an attempt is made to automate the entire flood mapping chain. The prototype study, is demonstrated for the state of Assam and the modules developed are tested for the multiple flood events during the Brahmaputra floods of August–September, 2016. The modules are checked for each stage and their outputs are validated with those as derived from manual procedures. The study has demonstrated significant reduction in the turn out time for flood response, which is very important during rapid disaster response.

Efficacy of Newer Molecules, Bioagents and Botanicals against Maydis Leaf Blight and Banded Leaf and Sheath Blight of Maize

Malik, Vinod Kumar,Singh, Manjeet,Hooda, Karambir Singh,Yadav, Naresh Kumar,Chauhan, Prashant Kumar The Korean Society of Plant Pathology 2018 Plant Pathology Journal Vol.34 No.2

Maize (Zea mays L.; 2N=20) is major staple food crop grown worldwide adapted to several biotic and abiotic stresses. Maydis leaf blight (MLB) and banded leaf and sheath blight (BLSB) are serious foliar fungal diseases may cause up to 40% and 100% grain yield loss, respectively. The present studies were undertaken to work out the efficacy of chemicals, botanicals and bioagents for the management of MLB and BLSB under field condition for two seasons Kharif 2014 and 2015. Five molecules (propiconazole 25 EC, hexaconazole 25 EC, carbendazim 50 WP, mancozeb 75 WP and carbedazim 12 WP + mancozeb 63 WP), two bioagents i.e. Trichoderma harzianum and T. viridae and three botanicals namely azadirachtin, sarpagandha and bel pathar were tested for their efficacy against MLB. Eight newer fungicides viz., difenconazole 250 SC, hexaconazole 5 EC, carbendazim 50WP, validamycin 3 L, tebuconazole 250 EC, trifloxystrobin 50 WG + tebuconazole 50 WG, azoxystrobin 250 EC and pencycuron 250 SC were evaluated against BLSB. Analysis revealed significant effects of propiconazole at 0.1%, carbendazim 12 WP + mancozeb 63 WP at 0.125% and sarpagandha leaves at 10% against MLB pathogen, whereas validamycin at 0.1% and trifloxystrobin 25 WG + tebuconazole 50 WG at 0.05% were found effective against BLSB. The slow rate of disease control virtually by the bioagents might have not shown instant effect on plant response to the yield enhancing components. The identified sources of management can be used further in strengthening the plant protection in maize against MLB and BLSB.

Highly Efficient Photocatalytic Studies on Bi36 Fe2 O57 Ceramic Synthesized by Chemical Route

Manish Kumar Verma,Vinod Kumar,Upakar Patel,Vishnu Shankar Rai,Anup Kumar,Arup Kumar De,Aditya Kumar Prajapati,Dinesh Prajapati,Kedar Sahoo,Tapas Das,N. B. Singh,K. D. Mandal 한국전기전자재료학회 2023 Transactions on Electrical and Electronic Material Vol.24 No.5

Bi36 Fe2 O57 (BFO) polycrystalline ceramic was synthesized by economical chemical route. The single-phase formation of BFO ceramic was confirmed by powder X-ray diffraction studies. Nanosized formation of BFO ceramics established by XRD and TEM analysis. The bimodal distribution of grain size is observed with size ranging from 50 to 600 nm. It observed that the Bi36 Fe2 O57 photocatalyst exhibited higher catalytic activity for the degradation of Methylene Blue (MB) under visible-light irradiation The oxidation state of elements present in the BFO ceramic, was confirmed by XPS studies. The pseudocapacitive nature of BFO ceramic was observed by cyclic Voltammetry. The dielectric constant of BFO ceramic was found 375 at 1 kHz at 300 K. The dielectric loss was found 0.51 at 100 kHz and 300 K.

Comparative Potential of Phenotypic, ISSR and SSR Markers for Characterization of Sesame (Sesamum indicum L.) Varieties from India

Kumar, Vinod,Sharma, Satyendra Nath 한국작물학회 2011 Journal of crop science and biotechnology Vol.14 No.3

The assessment of genetic diversity is a primary concern of plant breeders and germplasm curators for which morphological traits are internationally accepted descriptors but are often associated with limitations due to G ${\times}$ E interactions. Phenotypic, ISSR, and SSR markers were employed to determine the genetic diversity and relationships among 20 commercially cultivated sesame genotypes representing different geographical regions of India. A narrow range of genetic dissimilarity (0.01 - 0.12) with mixed clustering was observed using morphological descriptors. A total 279 band positions with 57% polymorphism was amplified by ISSR primers, whereas 36 allelic positions with 73% polymorphism were produced by SSR primers with 100% reproducibility. The ISSR primers with high discrimination power were identified producing genotype-specific bands and distinguishing all the sesame genotypes used in this study. A poor correlation and lack of perfect congruence between phenotypes and marker-based analysis was indicated by the UPGMA dendrogram and PCA analysis. Our results suggest that SSR and ISSR markers provide a powerful tool for genotype identification and establishment of genetic relationships among sesame genotypes. We recommend the use of molecular markers for testing, required for obtaining intellectual property rights, and also for the analysis of genotypic diversity among sesame varieties.

Review : Enzyme Based Biosensors for Detection of Environmental Pollutants- A Review

( Vinod Kumar Nigam ),( Pratyoosh Shukla ) 한국미생물 · 생명공학회 2015 Journal of microbiology and biotechnology Vol.25 No.11

Environmental security is one of the major concerns for the safety of living organisms from a number of harmful pollutants in the atmosphere. Different initiatives, legislative actions, as well as scientific and social concerns have been discussed and adopted to control and regulate the threats of environmental pollution, but it still remains a worldwide challenge. Therefore, there is a need for developing certain sensitive, rapid, and selective techniques that can detect and screen the pollutants for effective bioremediation processes. In this perspective, isolated enzymes or biological systems producing enzymes, as whole cells or in immobilized state, can be used as a source for detection, quantification, and degradation or transformation of pollutants to non-polluting compounds to restore the ecological balance. Biosensors are ideal for the detection and measurement of environmental pollution in a reliable, specific, and sensitive way. In this review, the current status of different types of microbial biosensors and mechanisms of detection of various environmental toxicants are discussed.

Review on Mechanical Recycling of End-of-Life Electrical and Electronic Equipments for Recovery of Metallic Components

Vinod Kumar,이재천,정진기,김병수 한국자원공학회 2010 한국자원공학회지 Vol.47 No.5

Waste electrical and electronics (WEEE) contain metals, glass, and plastics in association with several hazardous materials. WEEE processing usually involves dismantling the discarded equipments followed by sorting and segregation of different components such as glass, large plastics, metal composites and other special parts and reusable units. Segregated scraps are subjected to comminution for effective liberation of constituent metals from the associated nonmetallic materials. Physical beneficiation methods such as gravity, magnetic and electrostatic separation are generally employed to separate light weight fractions, and ferrous and non-ferrous metals. Metallic concentrate can further be subjected to hydrometallurgical treatment for the extraction and recovery of metals. In this review, current status of treatment of waste printed circuit boards (PCBs) and recycling technologies in practice are presented. The problems encountered in the existing recycling processes are particularly discussed. A processing approach involving application of inexpensive and eco-friendly unit operations based on the physical beneficiation for complete recycling and resource utilization of all materials with high efficiency for waste PCBs is highlighted and discussed in brief.

Densities and Speeds of Sound of <i>Jatropha curcas</i> Biodiesel + (C₄–C₅) Alkan-1-ol Binary Mixtures

Kumar, Satish,Sharma, Vinod Kumar,Lim, Wonsub,Cho, Jae Hyun,Moon, Il American Chemical Society 2012 Journal of chemical and engineering data Vol.57 No.8

<P>Densities (ρ<SUB>mix</SUB>) and speeds of sound (<I>u</I><SUB>mix</SUB>) for binary blends of <I>Jatropha curcas</I> biodiesel (1) + <I>n</I>-butanol or <I>n</I>-pentanol (2) were measured at <I>T</I> = (288.15 to 308.15) K and atmospheric pressure, over the entire composition range, with the help of a density and sound velocity meter (DSA 5000 M, Anton Paar). The density values were used to evaluate the excess molar volumes <I>V</I><SUB>mix</SUB><SUP>E</SUP>. The Redlich–Kister polynomial equation was adopted to compute and correlate the results, and a good agreement has been observed between experimental and calculated values. It has been observed that the ρ and <I>u</I> values of pure components and their binary blends decreased with respect to temperature. Further, results have been analyzed in terms of molecular forces functioning between biodiesel and alcohols.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jceaax/2012/jceaax.2012.57.issue-8/je300256m/production/images/medium/je-2012-00256m_0008.gif'></P>

Recycling of printed circuit boards (PCBs) to generate enriched rare metal concentrate

Kumar, Vinod,Lee, Jae-chun,Jeong, Jinki,Jha, Manis Kumar,Kim, Byung-su,Singh, Ratnakar Elsevier 2015 Journal of industrial and engineering chemistry Vol.21 No.-

<P><B>Abstract</B></P> <P>An eco-friendly process for recycling obsolete PCBs to get enriched rare-metal concentrate using physical separation technique is discussed. Metal concentration in digital video disc (DVD) PCBs is ∼43wt.% whereas in vacuum cleaner (VC) PCBs ∼30wt.% with rare metal of ∼ 2.8%. Concentrate grade of ∼88% total metals including ∼5.85% rare metals in-case of DVD-PCBs while ∼90% of total metals including ∼2.81% rare metals in-case of VC-PCBs was achieved by froth flotation. While ∼75% total metals including ∼9.41% rare metals for DVD-PCBs and ∼65% total metals including ∼5.10% rare metals for VC-PCBs was obtained by pneumatic separation.</P> <P><B>Highlights</B></P> <P> <UL> <LI> High metal recovery achieved from PCBs of EOL-DVD and EOL-VC. </LI> <LI> The evolved process doesn’t require any chemical reagents. </LI> <LI> The process is eco-friendly and economical with no recurring cost. </LI> <LI> Re-circulating and water conservation in close-loop nutsche filtration. </LI> <LI> Enriched metallic concentrate is suitable for hydrometallurgical purification. </LI> </UL> </P>