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Microbial Biomass Dynamics in a Tropical Agroecosystem： Influence of Herbicide and Soil Amendments

Pedosphere 2016年第2期26卷 257-264页

作者： Alka SINGH mahesh kumar SINGH Nandita GHOSHAL Centre of Advanced Study in Botany Department of Botany Banaras Hindu University Varanasi 221005 India

The influences of herbicide alone and in combination with the soil amendments with contrasting resource qualities on dynamics of soil microbial biomass C （MBC）, N （MBN）, and P （MBP） were studied through two annual cycles in rice-wheat-summer fallow crop sequence in a tropical dryland agroecosystem. The experiment included application of herbicide （butachlor） alone or in combination with various soil amendments having equivalent amount of N in the forms of chemical fertilizer, wheat straw, Sesbania aculeata, and farm yard manure （FYM）. Soil microbial biomass showed distinct temporal variations in both crop cycles, decreased from vegetative to grain-forming stage, and then increased to maximum at crop maturity stage. Soil MBC was the highest in herbicide ＋ Sesbania aculeata treatment followed by herbicide ＋ FYM, herbicide ＋ wheat straw, herbicide ＋ chemical fertilizer, and herbicide alone treatments in decreasing order during the rice-growing period. During wheat-growing period and summer fallow, soil MBC attained maximum for herbicide ＋ wheat straw treatment whereas herbicide ＋ FYM, herbicide ＋ Sesbania, and herbicide ＋ chemical fertilizer treatments showed similar levels. The overall trend of soil MBN was similar to those of soil MBC and MBP except that soil MBN was higher in herbicide ＋ chemical fertilizer treatment over the herbicide ＋ wheat straw treatment during rice-growing period. In spite of the addition of equivalent amount of N through exogenous soil amendments in combination with the herbicide, soil microbial biomass responded differentially to the treatments. The resource quality of the amendments had more pronounced impact on the dynamics of soil microbial biomass, which may have implications for long-term sustainability of rainfed agroecosystems in dry tropics.

关键词： chemical fertilizer farmyard manure organic amendment Sesbania aculeata wheat straw

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Chemical composition and source apportionment of PM2.5 and PM2.5-10 in Trombay （Mumbai, India）, a coastal industrial area

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Particuology 2018年第2期16卷 143-153页

作者： Sandeep Police Sanjay kumar Sahu mahesh Tiwari Gauri Girish Pandit Environmental Monitoring and Assessment Section Bhabha Atomic Research Centre Mumbai 400085 India Homi Bhabha National Institute Anushakti Nagar Mumbai 400094 India

PM2.5 and PM2.5 lo concentrations, elemental constituents, and sources in a densely populated coastal industrial area （Trombay, Mumbai） were investigated in 2010 and *** PM2.s and PM2.s lo concentra- tions were 13.50-71.60 and 22.40-127.78 p^g/m3, respectively. The daily PM25 concentrations exceeded the Indian Central Pollution Control Board limit （60 μg/m3） several days in winter. Of the elements analyzed, Si then Al had the highest concentrations in PM2.5- 10, but black carbon then Si had the highest concentrations in PM2.s. The element concentrations varied widely by season. Al, Ca, Fe, Si, and Ti con- centrations were highest in summer, Cl, Mg, and Na concentrations were highest in the monsoon season, and the other trace metal concentrations in both PM2.5 and PM2.5-10 were highest in winter. The PM2.5 and PM2.5-10 sources were apportioned by positive matrix factorization. PM2.5 and PM2.5-10 had six dominant sources, crustal material （8.7% and 25.3%, respectively）, sea salt spray （6.1% and 15.0%, respectively）, coal/biomass combustion （25.5% and 13.8%, respectively）, fuel oil combustion （19.0% and 11.2%, respectively）, road traffic （ 17.7% and 12.6%, respectively）, and the metal industry （ 10.6% and 7.0%, respectively）. Anthropogenic sources clearly contributed most to PM2.5 but natural sources contributed most to PM2.5-10.

关键词： Trombay PM2.5 PM2.5-10 Black carbon Metals Positive matrix factorization

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Single center experience of capsule endoscopy in patients with obscure gastrointestinal bleeding

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World Journal of Gastroenterology 2011年第6期17卷 774-778页

作者： mahesh kumar Goenka Shounak Majumder Sanjeev kumar Pradeepta kumar Sethy Usha Goenka Institute of Gastroenterology Apollo Gleneagles Hospital

AIM:To identify optimum timing to maximize diagnostic yield by capsule endoscopy (CE) in patients with obscure gastrointestinal bleeding (OGIB).METHODS:We identified patients who underwent CE at our institution from August 2003 to December *** medical records were reviewed to determine type of OGIB (occult,overt),CE results and complications,and timing of CE with respect to onset of ***:Out of 385 patients investigated for OGIB,284 (74%) had some lesion detected by *** 222 patients (58%),definite lesions were detected that could unequivocally explain *** bowel ulcer/erosions secondary to Crohn's disease,tuberculosis or non-steroidal anti-inflammatory agent use were the commonest lesions *** with overt GI bleeding for < 48 h before CE had the highest diagnostic yield (87%).This was significantly greater (P < 0.05) compared to that in patients with overt bleeding prior to 48 h (68%),as well as those with occult OGIB (59%).CONCLUSION:We established the importance of early CE in management of *** within 48 h of overt bleeding has the greatest potential for lesion detection.

关键词： Capsule endoscopy Gastrointestinal bleeding

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Transient analysis of Casson fluid thermo-convection from a vertical cylinder embedded in a porous medium: Entropy generation and thermal energy transfer visualization

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Journal of Central South University 2019年第5期26卷 1342-1361页

作者： JANARDHANA REDDY G BHASKERREDDY Kethireddy mahesh kumar ANWAR BEG O Department of Mathematics Central University of KarnatakaKalaburagi585367India Fluid Mechanics Aeronautical and Mechanical Engineering DepartmentSchool of ComputingScience and EngineeringUniversity of SalfordManchester M54WTUK

Thermal transport in porous media has stimulated substantial interest in engineering sciences due to increasing applications in filtration systems,porous bearings,porous layer insulation,biomechanics,geomechanics *** by such applications,in this article,a numerical study of entropy generation impacts on the heat and momentum transfer in time-dependent laminar incompressible boundary layer flow of a Casson viscoplastic fluid over a uniformly heated vertical cylinder embedded in a porous medium is ***’s law is used to simulate bulk drag effects at low Reynolds number for an isotropic,homogenous porous *** line visualization is also *** mathematical model is derived and normalized using appropriate transformation *** resulting non-linear time-dependent coupled governing equations with associated boundary conditions are solved via an implicit finite difference method which is efficient and unconditionally *** outcomes show that entropy generation and Bejan number are both elevated with increasing values of Darcy number,Casson fluid parameter,group parameter and Grashof *** analyze the heat transfer process in a two-dimensional domain,plotting heat lines provides an excellent approach in addition to streamlines and *** is remarked that as the Darcy number increases,the deviations of heat lines from the hot wall are reduced.

关键词： vertical cylinder entropy generation Casson fluid finite difference method heat function porous medium

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Optimal integration of battery energy-storage system with high penetration of renewable energy in radial distribution network

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Clean Energy 2022年第3期6卷 404-411页

作者： Hafsa Imra Sheikh mahesh kumar Rathi Amir Mahmood Soomro Department of Electrical Engineering Mehran University of Engineering and TechnologyJamshoroPakistan

Considering the intermittent nature of renewable energy,a storage system to reserve power in off-peak hours and then to supply it during peak hours is ***,if these storage devices in a network are not placed in an appropriate manner,the advantages can never be *** this study,the allocation and sizing strategies of a battery energy-storage system(BESS)in an optimal way are proposed to improve the performance of the radial distribution *** test network adopted is a standard IEEE 33 bus network that is integrated with solar *** are carried out in DIgSILENT PowerFactory for the distribution network model and the process of optimization is done through MATLAB®.The optimization algorithm adopted is the genetic *** system is studied for 24 hours with a step size of 15 minutes,employing a time-sweep analysis of dynamic *** is studied under three different scenarios and the results are *** results illustrate a considerable reduction in power losses in the case of the optimized *** total losses before the optimization process are 16365.57 *** total losses after the employment of the proposed solution are 10246.5 kW,which means that the losses are reduced by≤62%.

关键词： energy and environment energy storage solar

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Surveillance of antibiotic sensitivity pattern in chronic suppurative otitis media of an Indian teaching hospital

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World Journal of Otorhinolaryngology-Head and Neck Surgery 2019年第2期5卷 88-94页

作者： mahesh Chandra Sahu Santosh kumar Swain IMS and SUM Hospital Siksha'O'Anusandhan UniversityK8KalinganagarBhubaneswar751003OdishaIndia Department of Otorhinolaryngology IMS and SUM HospitalSiksha'O'Anusandhan UniversityK8KalinganagarBhubaneswar751003OdishaIndia

Introduction:Chronic suppurative otitis media (CSOM) is a common problem in worldwide and untreated CSOM leads to fatal complications like facial nerve paralysis,lateral sinus thrombosis,labyrinthitis,meningitis and brain abscess in developing country like ***:To isolate causative bacteria and antibiotic sensitivity pattern for CSOM and to know the prevalence of extended spectrum beta lactamases (ESBL) and Metallobetalactamases (MBL) in CSOM ***:A total of 500 ear swabs of clinical suspected CSOM patients were cultured on specific cultured medium and identified the bacteria with conventional *** all the identified bacteria were subjected with specific antibiotics by the Kirby-Bauer's method to know the resistance pattern of *** and MBL strains were detected by double disc diffusion ***:A total of 384 bacteria were isolated from 500 CSOM patients,among them 86 *** (22.40%),112 Staphylococcus aureus (29.17%),53 *** (13.80%),32 *** (18%),26 *** (6.77%),24 *** (6.25%),23 *** (5.99%),18 *** (4.69%) and 10 *** (2.60%) identified with conventional *** antibiotic disc diffusion methods 74.22% ESBL strains and 9.90%MBL strains were *** resistant strains of *** (86/384,22.40%) were more prevalent than those of *** (112/384,29.17%) and other bacteria in ear *** and vancomicin could control to gram negative bacteria and gram positive bacteria ***:Continuous and periodic evaluation of microbiological profile and antimicrobial sensitivity pattern of bacterial is essential for optimum management of CSOM patients.

关键词： Antibiotics Chronic suppurative otitis media Gram negative bacteria ESBL MBL

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Two-level supply chain models with imperfect quality items when demand influences price and marketing promotion

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Journal of Management Analytics 2022年第4期9卷 480-495页

作者： Rita Yadav Sarla Pareek Mandeep Mittal mahesh kumar Jayaswal Department of Mathematics and Statistics Banasthali VidyapithBanasthaliIndia Department of Mathematics Amity Institute of Applied SciencesAmity University Uttar PradeshNoidaIndia

The present paper studies a supply chain model with items that are of imperfect quality and with the assumption that end demand is responsive to price and promotion *** seller delivers items to the buyer in a *** an inspection process,it is observed that few articles produced are not of perfect *** defects might be the result of common operations or static *** defective items are then collected and are sold at a lower/discounted *** this paper,supply chain models are developed to approve the interaction among the players,in the supply chain *** interaction between the players is demonstrated by non-cooperative and cooperative game theoretical *** non-cooperative approach,optimal solutions are attained by game theoretic approaches named as Seller–Stackelberg and Buyer–*** the cooperative approach,a Pareto efficient solution is *** the last,numerical illustrations with sensitivity scrutiny are presented to support the theory of the present paper.

关键词： game theory imperfect quality items supply chain co-operative game non-cooperative games

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Recent advances on pathogenesis,diagnosis,prevention,immunological aspects,and vectors of dengue:A review

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Asian Pacific Journal of Tropical Biomedicine 2023年第8期13卷 325-338页

作者： mahesh Chandra Sahu Rakesh kumar Samantaray Aditi Pal Sanghamitra Pati Division of Medical Entomology ICMR-Regional Medical Research CentreChandrasekharpurBhubaneswar-751023OdishaIndia ICMR-Regional Medical Research Centre ChandrasekharpurBhubaneswar-751023OdishaIndia

Dengue is a vector-borne disease caused by the dengue virus(DENV)of family *** fever is common in both developed and developing ***,approximately 400 million cases of dengue fever are reported annually,resulting in approximately 22000 *** cases in India have progressively increased in the last *** recent years,substantial progress has been made in understanding various aspects of dengue,including its pathogenesis,diagnosis,prevention strategies,immunological responses,and the role of vectors in its *** transmission of a positive RNA virus occurs through Aedes mosquitoes,specifically Aedes aegypti and Aedes *** virus is associated with a wide spectrum of symptoms,ranging from mild undifferentiated fever to severe hemorrhagic fever and shock,posing a potential threat to human *** are 4 types of antigenically distinct dengue serotypes(DENV-1 to DENV-4)and among them,DENV-2 is more lethal and extremely *** overcome the severity of dengue,Dengvaxia is administered to children 9 to 16 years old with evidence of previous dengue *** diagnosis of dengue is carried out by ELISA-based non-structural protein(NS1)and immunoglobulin ***,there are no specific biomarkers to identify severe disease *** factors and temperature play an important role in complex interaction among host,vector,and virus to manifest the severity of *** is a need for the refinement of climate-based disease forecasting models in India to effectively control the spread of *** mosquito repellent should be used periodically to kill or repel the Aedes mosquito to prevent the spread of dengue in humans.

关键词： Dengue Aedes mosquitoes Insecticide NS1 Immunoglobulin

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A New Voltage Control Strategy to Improve Performance of DSTATCOM in Electric Grid

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CES Transactions on Electrical Machines and Systems 2020年第4期4卷 295-302页

作者： Chandan kumar mahesh KMishra Saad Mekhilef Electronics and Electrical Engineering Department Indian Institute of Technology GuwahatiIndia Electrical Engineering Department Indian Institute of Technology MadrasChennaiIndia Department of Electrical Engineering University of MalayaMalaysia

A new voltage control strategy of distribution static compensator(DSTATCOM)has been proposed in this paper for electric grid *** proposed control scheme combines two methods of DSTATCOM operation to improve its *** power factor and voltage magnitude as degree of freedom,the DSTATCOM provides features such as mitigation of voltage and current harmonics,balancing of source currents,improvement of power factor,voltage regulation during voltage sag and swell,reduction in inverter losses,and control of load power to achieve energy *** performance of proposed DSTATCOM control is better as compared to its conventional operation at any time of *** simulation and experimental results validate the performances.

关键词： Reactive power DSTATCOM multifunctional

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Sm^(3+)induced structural phase transition,spectral,morphological,magnetic,dielectric and impedance properties of Ni_(0.1)Cu_(0.9)Sm_(x)Fe_(2-x)O_(4) nanoferrites

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Journal of Rare Earths 2023年第11期41卷 1736-1745,I0003页

作者： K.Rajashekhar G.Vinod K.mahesh kumar G.Harikishan Laxman Naik J Department of Physics University College of ScienceOsmania UniversityHyderabad500007TelanganaIndia Department of Physics Kamala Institute of Technology and ScienceHuzurabad505468TelanganaIndia Department of Physics CMR College of Engineering&TechnologyHyderabad501401TelanganaIndia

In the present study,rare earth samarium(Sm^(3+))substituted Ni-Cu spinel ferrites with the composition of Ni_(0.1)Cu_(0.9)Sm_(x)Fe_(2-x)O_(4)(0≤x≤0.05 in steps of 0.01)were synthesized by using the citrate induced sol-gel auto combustion *** ferrites'structural,optical,magnetic,and dielectric studies were carried out using X-ray diffraction(XRD),Fourier transform infrared spectroscopy(FTIR),field emission scanning electron microscopy(FESEM),ultraviolet-visible(UV-vis),a vibrational sample magnetometer(VSM),and an LCR *** pure Ni-Cu ferrite exhibits a tetragonal structure owing to the presence of the John Tellar ion(Cu^(2+)).XRD patterns confirm that the tetragonal structure gradually transforms into the cubic spinel structure with samarium *** nano-scale structures of these ferrites were confirmed by the average crystallite size(10.11-20.99 nm)derived from the X-ray diffraction patterns,and grain size(42.60-83.36 nm)assessed from FESEM *** existence of elements according to their chemical composition was verified by using energy dispersive X-ray(EDX)*** absorption bands(v_(1) and v_(2))detected in FTIR transmission spectra below the wavenumber of 600 cm^(-1)reveal the stretching vibrations of M-O bonds in the spinel structure at tetrahedral and octahedral *** band gap ene rgy obtained from UV absorption reveals the semiconducting nature of the *** high saturation magnetization(M_(s))is noticed at 15 K temperature for x=0.02 composition as 32.98 emu/g,while at 300 K for x=0.01composition as 27.61 emu/*** suggested cation distribution is in good agreement with observed and predicted magnetic moment values at 300 *** expected behavior of ferrites reveals the observed dielectric constant,loss tangent,and ac-conductivity values in the frequency range of 20 Hz-20 ***-Cole plots confirm that the impedance contribution is attributed to grain boundaries.

关键词： Nanoferrites XRD Magnetic properties Dielectric properties Cole-cole plots Rare earths

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