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Journal of Minerals and Materials Characterization and Engineering 2021年第5期9卷 444-461页

作者： Manish kumar Verma Vinod kumar Tapas Das Ravi kumar Sonwani Vishnu Shankar Rai Dinesh Prajapati Kedar Sahoo vishal kumar kushwaha Asha Gupta Kamdeo Mandal Department of Chemistry Indian Institute of Technology (Banaras Hindu University) Varanasi India Department of Chemical Engineering Indian Institute of Technology (Banaras Hindu University) Varanasi India

Bi2Fe4O9 crystalline ceramic was successfully synthesized through a soft chemical route at lower sintering temperature for analysis of photocatalytic behavior with respect to adsorption of Congo Red (CR) in the presence of UV-VIS irradiation. The single-phase formation of Bi2Fe4O9 ceramic was confirmed by powder X-ray diffraction studies and particle size observed by TEM analysis was found to be 148 ± 5 nm which reveals the crystalline nature of the materials. Additionally, the photocatalytic activity of Bi2Fe4O9 ceramic was evaluated by the degradation of Congo Red in presence of visible light. The optical band gap (Eg) of the synthesized materials was found to be 1.8 eV. It exhibited greater photocatalytic activity than other synthesized materials like BiFeO3 as well as TiO2 due to a smaller band gap (1.8 eV). Furthermore, process variables such as pH.

关键词： Chemical Route Microstructural Studies Dielectric Properties Adsorption Cyclic Voltammetry Analysis

Relativistic Self-Focusing of Hermite-cosh-Gaussian Laser Beam in Magnetoplasma with Exponential Plasma Density Ramp

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Communications in Theoretical Physics 2019年第12期71卷 1469-1474页

作者： Niti Kant Shivani Vij Sudarshan kumar Chakravarti Juleshwar Prasad kushwaha vishal Thakur Dcpartmcnt of Physics Lovely Professional UniversityG.T.Hoad.Phagwara 144411PunjabIndia Department of Applied Sciences DAV Institute of Engineering&TechnologyJalandhar-144008PunjabIndia Department of Physics T.M.B.UniversityUhagalpurIndia

In the present manuscript,we analyse the effect of exponential plasma density ramp for relativistic selffocusing of Hermite-cosh-Gaussian laser pulse in *** exponential plasma density ramp is found to be more prominent in achieving the stronger self-focusing of Hermite-cosh-Gaussian laser beam in comparison to the tangential plasma density *** propose a theoretical model for propagation of Hermite-cosh-Gaussian laser pulse in magnetoplasma with exponential density *** nonlinearity in the medium arises because of the relativistic motion of electrons,being responsible for relativistic *** of the beam width parameter is set up by taking the expression for the dielectric function and following Wentzel-Kramers-Brillouin(WKB)with paraxial ray approximations for mode indices m=0,1 and *** of decentered parameter is also analysed,which results in stronger self-focusing of the Hermite-cosh-Gaussian laser *** self-focusing of laser beam is more pronounced in high density plasma with higher magnetic field.

关键词： self-focusing decentered parameter exponential density ramp Hermite-cosh-Gaussian beam

Potential of roots and shoots of Napier grass for arresting soil erosion and runoff of mollisols soils of Himalayas

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International Soil and Water Conservation Research 2023年第3期11卷 538-548页

作者： Sushma Tamta Akhilesh kumar Daniel Prakash kushwaha Krishi Vigyan Kendra Khodawandpur848202BegusaraiBiharIndia Department of Soiland Water Conservation Engineering G.B.Pant University of Agriculture and TechnologyPantnagar263145India

In this study, a soil filled Hydraulic Tilting Flume (HTF) was used as a test plot under simulated rainfallconditions. This flume was flled with mollisols soils (sandy loam in texture) collected from tarai regionof Himalayas. The effects of root and shoot characteristics of Napier grass in terms of leaf area index (LAI),shoot length (SL), number of leaves (NL), number of tillers (NT), shoot biomass (SB), root density (RD),root length (RL), root biomass (RB), and total biomass (TB) were investigated on runoff and sedimentoutflow at 90, 120 and 150 days after planting (DAP). Four simulated rainfall intensities namely 4.0, 6.5,8.3 and 9.4 cm/h over three land slopes of 1, 2 and 3% were selected. Runoff samples collected fromwhole plant plot and only root plot were analyzed for runoff and sediment outflow. Findings revealedthat Napier grasses were very effective to reduce runoff and sediment outflow and its efficacy increasedwith the extended growth stages. The reduction in runoff and sediment outflow at 90, 120 and 150 DAPwas obtained as 56% and 85%, 68% and 90%, and 74% and 96%, respectively, as compared to bare plotconditions. It was observed that the comparative contribution of shoots in runoff rate reduction washigher than the roots. On the contrary, the root part of the plant showed more contribution in sedimentrate reduction as compared to the shoot part. Step wise regression was attempted for the selection ofeffective input parameters to establish authentic runoff and sediment outflow models. Power form ofmultiple non-linear regression (MNLR) showed very satisfactory results for predicting runoff and sedimentoutflow with coefficient of determination (R^(2)) as 97.4% and 99.0%, respectively, root mean squareerror (RMSE) as 38.8 cc/m^(2)/min and 0.126 g/m^(2)/min, respectively, and coefficient of efficiency (CE) as93.9% and 96.7%, respectively, during testing period.

关键词： Rootand shoot characteristics Runoff and sedimentreduction Simulated rainfall conditions Hydraulic tilting flume Step wise regression analysis

Application of Fractional Order PID Controller for AGC Under Deregulated Environment

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International Journal of Automation and computing 2018年第1期15卷 84-93页

作者： Nagendra kumar Barjeev Tyagi vishal kumar Department of Electrical Engineering Indian Institute of Technology

In this paper, a fractional order proportional integral derivative （FOPID） controller for multiarea automatic generation control （AGC） scheme has been designed. FOPID controller has five parameters and provides two additional degrees of flexibility in comparison to a proportional integral derivative （PID） controller. The optimal values of parameters of FOPID controller have been determined using Big Bang Big Crunch （BBBC） search algorithm. The designed controller regulates real power output of generators to achieve the best dynamic response of frequency and tie-line power on a load perturbation. The complete scheme for designing of the controllers has been developed and demonstrated on multiarea deregulated power system. The performance of the designed FOPID controllers has been compared with the optimally tuned PID controllers. It is observed from the results that the FOPID controller shows a considerable improvement in the performance as compared to the conventional PID controller.

关键词： Automatic generation control (AGC) deregulation Big Bang Big Brunch (BBBC) algorithm fractional order propor-tional integral derivative (FOPID) controller optimization.

Analysis on multiple optical line terminal passive optical network based open access network

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Frontiers of Optoelectronics 2019年第2期12卷 208-214页

作者： Love kumar Amarpal SINGH vishal SHARMA IK Gujral Punjab Technical University Kapurthala Punjab 144603India Beant College of Engineering and Technology Gurdaspur Punjab 143521India Shaheed Bhagat Singh State Technical Campus Ferozepur Punjab 152004India

Passive optical networks (PONs) offer suffi-cient bandwidth to transfer huge amount having different packet sizes and data rates being generated by fusion of various networks. Additionally, multiple optical line terminals (OLTs) PONs reduce the computational com-plexity of data processing for nonuniform traffic. However, in order to improve the bandwidth allocation efficiency of a mixture of service providers, dynamic bandwidth algo-rithm (DBA) is needed for uplink communication. In this paper, a PON based open access network (OAN) is analyzed for bi-directional communication at various data rates. Multiple wavelengths are used to modulate the data of various service providers to evade the complicated DBA for uplink data broadcasting. The performance of the network is reported in terms of bandwidth exploitation, uplink effectiveness, overhead-to-data ratio and time cycle duration. The network is analyzed at various data rates to reveal the data accommodation capacity.

关键词： passive optical network (PON) open access network (OAN) optical line terminal (OLT) hybrid network

Beneficial and detrimental effects of processed dietary fibers on intestinal and liver health:health benefits of refined dietary fibers need to be redefined!

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Gastroenterology Report 2020年第2期8卷 85-89,I0001页

作者： vishal Singh Matam Vijay-kumar Department of Nutritional Sciences The Pennsylvania State UniversityUniversity ParkPAUSA UT-Microbiome Consortium Department of Physiology and PharmacologyThe University of Toledo College of Medicine and Life SciencesOHUSA Department of Medical Microbiology&Immunology The University of ToledoOHUSA

Consumption of processed foods—which are generally composed of nutritionally starved refined ingredients—has increased exponentially worldwide.A rise in public health awareness that low fiber intake is strongly linked to new-age disorders has spurred food manufacturers to fortify processed foods with refined dietary fibers(RDFs).Consumption of whole foods rich in natural fibers undoubtedly confers an array of health ***,it is not clear whether RDFs extracted from the whole plant,kernel,and fruit peels exert similar physiological effects to their naturally occurring *** studies caution that RDFs are not universally beneficial and that inappropriate consumption of RDFs may risk both gastrointestinal and liver ***,we briefly summarize the beneficial and detrimental effects of RDFs on digestive health and discuss the contribution of metabolites derived from microbial fermentation of RDFs in driving such positive or negative health outcomes.

关键词： gut microbiota fermentation IBD metabolic syndrome liver cancer

Investigation on the effect of oxalic acid, succinic acid and aspartic acid on the gas hydrate formation kinetics

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Chinese Journal of Chemical Engineering 2019年第9期27卷 2148-2156页

作者： Sheshan Bhimrao Meshram Omkar S.kushwaha Palle Ravinder Reddy Gaurav Bhattacharjee Rajnish kumar Department of Chemical Engineering Indian Institute of Technology

Gas hydrate reserves are potential source of clean energy having low molecular weight hydrocarbons trapped in water *** this work,we report how organic compounds of different chain lengths and hydrophilicities when used in small concentration may modify hydrate growth and either act as hydrate inhibitors or *** promoters foster the hydrate growth kinetics and are used in novel applications such as methane storage as solidified natural gas,desalination of sea water and gas *** the other hand,gas hydrate inhibitors are used in oil and gas pipelines to alter the rate at which gas hydrate nucleates and *** such as methanol and ethanol which form strong hydrogen bond with water have been traditionally used as hydrate ***,due to relatively high volatility a significant portion of these inhibitors ends up in gas stream and brings further complexity to the safe transportation of natural *** this study,organic additives such as oxalic acid,succinic acid and L-aspartic acid(all three)having––COOH group(s)with aspartic acid having an additional––NH2 group,are investigated for gas hydrate promotion/inhibition *** compounds are polar in nature and thus have significant solubility in liquid water;the presence of weak acidic and water loving(carboxylic/amine groups)moieties makes these organic acids an excellent candidate for further *** study would pave ways to identify a novel(read better)promoter/inhibitor for gas hydrate *** thermodynamic conditions were generated in a stirred tank reactor coupled with cooling system;comparison of gas hydrate formation kinetics with and without additives were carried out to identify the effect of these acids on the formation and growth of *** possible mechanisms by which these additives inhibit or promote the hydrate growth are also discussed.

关键词： Flow assurance Gas hydrates kinetics Hydrate promoters Hydrate inhibitors Inhibition mechanism Gas uptake measurement Induction time

Phenol in High-mass Star-forming Regions

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Research in Astronomy and Astrophysics 2022年第6期22卷 256-268页

作者： Rana Ghosh Milan Sil Suman kumar Mondal Prasanta Gorai Dipen Sahu Rahul kumar kushwaha Bhalamurugan Sivaraman Ankan Das Indian Centre for Space Physics 43 ChalantikaGaria Station RoadKolkata 700084India S.N.Bose National Centre for Basic Sciences Salt LakeKolkata 700106India Department of Space Earth&EnvironmentChalmers University of TechnologySE-41296 GothenburgSweden Institute of Astronomy and Astrophysics Academia Sinica Taipei Taipei 10617China Atomic and Molecular Physics Laboratory Institute for Nuclear Research(Atomki)Debrecen H-4026Hungary Physical Research Laboratory NavrangpuraAhmedabad 380009India

Phenol,which belongs to the C_(6)H_(6)O isomeric group,is the simplest molecule in the family of alcohol of the aromatic *** phenol has yet to be detected in the interstellar medium,a tentative identification was reported toward the Orion KL hot core using the IRAM-30 m line *** explore some more species of this isomeric group,we consider ten species to study the fate of their astronomical *** is noticed that phenol is the most energetically favorable isomer of this *** contrast,propargyl ether is the least favorable(having relative energy~103kcal mol^(-1)compared to phenol)species of this *** far,the studies associated with the formation of phenol are heavily concentrated on combustion ***,we suggest a few key reactions(C_(6)H_(6)+OH→C_(6)H_(5)+H_(2)O,C_(6)H_(6)+O→C_(6)H_(5)OH,C_(6)H_(6)+H→C_(6)H_(5)+H_(2),and C_(6)H_(5)+OH→C_(6)H_(5)OH+hν)for the formation of *** these pathways are included in a large gas-grain chemical network to study its formation in high mass star-forming regions and dark cloud *** is noticed that the phenyl(-C_(6)H_(5))formation by the ice-phase hydrogen abstraction reaction of benzene(i.e.,C_(6)H_(6)+OH→C_(6)H_(5)+H_(2)O if allowed at~10 K)could serve as the starting point for the formation of phenol in the gas phase by radiative association reaction C_(6)H_(5)+OH→C_(6)H_(5)OH+hν.The gasphase reaction C_(6)H_(6)+O→C_(6)H_(5)OH significantly contributes to the formation of phenol,when the ice-phase reaction C_(6)H_(6)+OH→C_(6)H_(5)+H_(2)O is not considered at low *** 4 ALMA archival data of a hot molecular core,G10.47+0.03,are *** yields an upper limit on phenol abundance of 5.19×10^(-9).Our astrochemical model delivers an upper limit on phenol abundance of~2.20×10^(-9)in the hot molecular core,whereas its production in the dark cloud is not satisfactory.

关键词： astrochemistry-ISM abundances-ISM molecules-(ISM:)evolution

Emerging targets in cancer drug resistance

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Cancer Drug Resistance 2019年第2期2卷 161-177页

作者： Shashank kumar Prem Prakash kushwaha Sanjay Gupta School of Basic and Applied Sciences Department of Biochemistry and Microbial SciencesCentral University of PunjabBathinda 151001India Department of Urology Case Western Reserve UniversityClevelandOhio 44106USA The Urology Institute University Hospitals Cleveland Medical CenterClevelandOhio 44106USA Department of Nutrition Case Western Reserve UniversityClevelandOhio 44106USA Divison of General Medical Sciences Case Comprehensive Cancer CenterClevelandOhio 44106USA Department of Urology Louis Stokes Cleveland Veterans Affairs Medical CenterClevelandOhio 44106USA.

Drug resistance is a complex phenomenon that frequently develops as a failure to chemotherapy during cancer *** cells increasingly generate resistance to various chemotherapeutic drugs through distinct mechanisms and *** the molecular mechanisms involved in drug resistance remains an important area of research for identification of precise targets and drug discovery to improve therapeutic *** review highlights the role of some recent emerging targets and pathways which play critical role in driving drug resistance.

关键词： Drug resistance transforming growth factor-β Keap1-Nrf2 PI3K-Akt FOXO transcription factors focal adhesion kinases annexins MIEN1 gene splicing sphingolipids microRNA

In vitro gene silencing of independent phosphoglycerate mutase (iPGM) in the filarial parasite Brugia malayi

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Infectious Diseases of Poverty 2013年第1期2卷 27-38页

作者： Prashant kumar Singh Susheela kushwaha Shahab Mohd Manisha Pathak Shailja Misra-Bhattacharya Division of Parasitology CSIR-Central Drug Research InstituteB.S.10/1Sector 10Jankipuram ExtensionSitapur RoadLucknow 226021UPIndia

Background:The phosphoglycerate mutase(PGM)enzyme catalyzes the interconversion of 2-and 3-phosphoglycerate in the glycolytic/gluconeogenic pathways that are present in the majority of cellular *** can be classified as cofactor-dependent PGM(dPGM)or cofactor-independent PGM(iPGM).Vertebrates,yeasts,and many bacteria have only dPGM,while higher plants,nematodes,archaea,and many other bacteria have only iPGM.A small number of bacteria,including Escherichia coli and certain archaea and protozoa,contain both *** silencing of ipgm in Caenorhabditis elegans(***)has demonstrated the importance of this enzyme in parasite viability and,therefore,its potential as an anthelmintic drug *** this study,the role of the Brugia malayi(***)ipgm in parasite viability,microfilaria release,embryogenesis,and in vivo development of infective larvae post-gene silencing was explored by applying ribonucleic acid(RNA)interference ***:The in vitro ipgm gene silencing by small interfering RNA(siRNA)leads to severe phenotypic deformities in the intrauterine developmental stages of female worms with a drastic reduction(~90%)in the motility of adult parasites and a significantly reduced(80%)release of microfilariae(mf)by female worms in *** half of the in vitro-treated infective L3 displayed sluggish *** in vivo survival and development of siRNA-treated infective larvae(L3)was investigated in the peritoneal cavity of jirds where a~45%reduction in adult worm establishment was ***:The findings clearly suggest that iPGM is essential for both larval and adult stages of *** parasite and that it plays a pivotal role in female worm *** results thus validate the Bm-iPGM as a putative anti-filarial drug target.

关键词： siRNA Lymphatic filariasis Drug target RNAi Embryogenesis