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Short-term impacts of biochar and manure application on soil labile carbon fractions,enzyme activity,and microbial community structure

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Biochar 2019年第3期1卷 271-282页

作者： Saroop Sandhu Udayakumar Sekaran Ekrem Ozlu Nigel O.Hoilett sandeep kumar Department of Soil and Water Science University of FloridaGainesvilleFL 32611USA Department of Agronomy Horticulture and Plant ScienceSouth Dakota State UniversityBrookingsSD 57007USA Department of Soil Science University of Wisconsin-MadisonMadisonWI 53006USA School of Agricultural Sciences Northwest Missouri State UniversityMaryvilleMO 64468USA

Biochar is known to ameliorate soil fertility and increase crop yield;however,information regarding its effects on soil chemical and biological properties remains *** experiment was conducted to study the short-term impacts of dif-ferent types of biochar on soil C fractions,enzyme activities,and microbial community structure at depositional and eroded landscape positions at different sampling times[before planting,after planting,and after harvesting of soybean(Glycine max L.)].Three biochar materials,produced from C-optimized gasification of corn(maize,Zea mays L.)stover(CS),pon-derosa pine(Pinus ponderosa Lawson and ***)wood residue(PW),and switchgrass(Panicum virgatum L.)(SG),and dairy manure(DM)and mixture of dairy manure and pinewood biochar(DMP),were applied at a rate of 10 Mg ha^(−1) to depositional and eroded landscape *** showed that the application of DMP and sole application of DM treat-ments significantly increased the labile C fractions at the depositional and eroded *** addition of DM and DMP increased the activities ofβ-glucosidase and urease enzymes,and those are involved in C and nitrogen cycling at depositional and eroded landscape *** were no significant differences between different biochar ***,there was an increase in soil microbial community structure in the DM and DMP treatments at both the landscape *** conclusion,our study revealed that DMP and sole application of DM influenced the soil labile C pool,enzyme activities,and microbial community structure at both the landscape positions for different sampling times.

关键词： Biochar Manure PLFA Labile C Urease β-Glucosidase

Comparison of two and three dimensional quantitative coronaryangiography to intravascular ultrasound in the assessment of leftmain coronary artery bifurcation lesions

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Chinese Medical Journal 2014年第6期127卷 1012-1021页

作者： Kan Jing Gao Xiaofei kumar Gami sandeep Xu Haimei Zhao Yingying Chen Shaoliang Chen Feng Department of Cardiology Nanjing First Hospital Nanjing Medical University Nanjing Jiangsu 210006 China School of Public Health Nanjing Medical University NanjingJiangsu 210006 China

Background Angiographic evaluation of left main coronary artery(LMCA) bifurcation lesions is often limited. two dimensional(2D) quantitative coronary angiography(QCA) with segmental analysis provides accuracy for quantification of the degree of stenosis in the main vessel and side branch ostium but can be affected by foreshortening and variable magnification. The accuracy of three dimensional(3D) QCA has recently developed to overcome 2D QCA limitations, however, accuracy and precision of 3D bifurcation QCA measurements in LMCA bifurcation lesions has not been *** We investigated whether such 3D and 2D bifurcation QCA measurements differ in their accuracy in assessing significant LMCA bifurcation lesions defined by intravascular ultrasound(IVUS) as a minimum luminal area(MLA) <6 mm2 of LMCA and MLA <4 mm2 of proximal left anterior descending(LAD) and/or proximal left circumflex(LCX)Results LMCA bifurcation lesions were assessed in 44 patients undergoing elective percutaneous coronary intervention. From 2D QCA measurements, MLA correlated moderately with threshold intravascular ultrasound MLA for LMCA(r=0.81, P <0.000 1), LAD(r=0.54, P=0.000 1) and LCX(r=0.58, P <0.000 1). Severity of lesion as MLA by derived 3D QCA, correlated moderately with threshold intravascular ultrasound MLA for LMCA(r=0.84, P <0.000 1), LAD(r=0.53, P=0.000 2); LCX(r=0.66, P <0.000 1). Overall, the C statistics tended to be slightly higher for 3D QCA and 2D QCA measurements in LMCA segment compared with proximal LAD and LCX segments, and there were no significant predictive power of percent diameter stenosis and percent area stenosis on 3D QCA for LCX IVUS MLA <4 mm2(percent diameter stenosis: area under curve 0.55, cutoff 23%, sensitivity 88%, specificity 37%, P=0.618 6; percent arer stenosis: area under curve 0.56, cutoff 41%, sensitivity 83%, specificity 38%, P=0.518 4, respectively).Conclusions The accuracy of 3D bifurcation QCA in detecting significant LMCA bifurcation les

关键词： three dimensional quantitative coronary angiography intravascular ultrasound left main coronary artery

Double segmental tibial fractures-- an unusual fracture pattern

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Chinese Journal of Traumatology 2011年第4期14卷 247-249页

作者： Kamal Baili Vishal kumar sandeep Patel Sameer Aggarwal Department of Orthopaedics Postgraduate Institute ofMedical Education and Research Sector 12 Chandigarh160012 India

Abstract：A case of a 50-year-old pedestrian who was hit by a bike and suffered fractures of both bones of his right leg was presented. Complete clinical and radiographic assessment showed double segmental fractures of the tibia and multisegmental fractures of the fibula. Review of the literature revealed that this fracture pattern was unique and only a single case was reported so far. Moreover, we discussed the possible mechanisms which can lead to such an injury. We also discussed the management of segmental tibial fracture and the difficulties encountered with them. This case was managed by modern osteosynthesis tech nique with a pleasing outcome.

关键词：骨折胫骨技术管理病例报告可能机制自行车影像学

Effect of exogenous progesterone on cumulus characteristics of buffalo oocytes by allowing passage of more number of sperm through cumulus but not essentially fertilization

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Asian pacific Journal of Reproduction 2018年第2期7卷 79-86页

作者： Madhusmita Panda Asmita sandeep kumar Purusottam Mishra Mahesh Chandra Sahu Sachinandan De Tirtha kumar Datta Rakesh kumar Nodal Officer Chief District Veterinary OfficeKadambedaBhadrak756100OdishaIndia Institute of Microbial Technology Council of Scientific and Industrial ResearchChandigarhIndia BSL-4 National Institute of VirologySus RoadPashanPune-411021India Goat Breeding Farm AT/PO-SalapadaDistrict-KeonjharPin code-758020State-OdishaIndia Directorate of Medical Research IMS and SUM HospitalSiksha'O'Anusandhan UniversityK8Kalinga NagarBhubaneswar-751003OdishaIndia Animal Biotechnology Centre National Dairy Research InstituteKarnal132001HaryanaIndia

Objective:To understand the level of progesterone (P4) in different quality of buffalo cumulus oocyte complexes (COCs) and further to evaluate the effect of exogenous P4 supplementation on maturation and subsequent developmental ability of poor quality brilliant cresyl blue (BCB-)***: Progesterone secreted by different quality of buffalo oocytes was estimated by enzyme linked immunosorbent assay and the concentration differences were translated into P4 doses to be incorporated in the maturation medium of BCB-ve COCs followed by expression analysis of genes involved in the cumulus expansion, extracellular matrix disintegration and progesterone receptor signalling. In addition, the study also evaluated the effect of exogenous P4 on sperm-cumulus interaction. Results: More than 10-fold up-regulated expression of progesterone receptor in P4 supplemented oocytes signified that P4 might be acting predominantly through this receptor. Also, exogenous P4 supplementation had significant effect on transcatheter arterial chemoembolization protease regulated by P4-progesterone receptor pathway which in turn had an important role in extracellular matrix disintegration. On the contrary, cumulus expansion genesHAS2,TNFAIP6,AREG were not altered upon P4 supplementation. Also, it was observed that P4 addition did facilitate passage of significantly more number of spermatozoa through P4 treated cumulus cells. Further, incorporation of different doses of P4 did not improve significantly the cleavage and blastocyst rates of BCB-ve ***: Different qualities of buffalo COCs secrete substantially diverse levels of P4, and its supplementation has a role in oocyte maturation via modulation of cumulus characteristics but perhaps not fertilization.

关键词： BCB screening Progesterone Sperm cumulus interaction Fertilizing ability

Analysis and Predictions of Spread, Recovery, and Death Caused by COVID-19 in India

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Big Data Mining and Analytics 2021年第2期4卷 65-75页

作者： Rajani kumari sandeep kumar Ramesh Chandra Poonia Vijander Singh Linesh Raja Vaibhav Bhatnagar Pankaj Agarwal Department of Information Technology and Computer Application JECRC UniversityJaipurRajasthan 303905India Bangalore Karnataka 560029India with Amity University Rajasthan JaipurRajasthan 303002India University Jaipur Rajasthan 303007India

The novel coronavirus outbreak was first reported in late December 2019 and more than 7 million people were infected with this disease and over 0.40 million worldwide lost their lives. The first case was diagnosed on30 January 2020 in India and the figure crossed 0.24 million as of 6 June 2020. This paper presents a detailed study of recently developed forecasting models and predicts the number of confirmed, recovered, and death cases in India caused by COVID-19. The correlation coefficients and multiple linear regression applied for prediction and autocorrelation and autoregression have been used to improve the accuracy. The predicted number of cases shows a good agreement with 0.9992 R-squared score to the actual values. The finding suggests that lockdown and social distancing are two important factors that can help to suppress the increasing spread rate of COVID-19.

关键词： COVID-19 regression correlation machine learning prediction

Monitoring of TDS and conductivity in groundwater in the seismically active region in NW Himalayas,India

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Earthquake Science 2010年第3期23卷 295-299页

作者： Arvind kumar Surinder Singh Bikramjit Singh Bajwa sandeep Mahajan Rajeev Kalia Sunil Dhar Department of Physics Guru Nanak Dev University Department of Geology Govt.CollegeDharamsala

The earthquake precursors and earthquake prediction are the burning issue among the community of earth scientists and engineers. Studies of earthquake precursory phenomena since the last several decades have shown that significant geophysical and geochemical changes may occur prior to intermediate and large earthquakes （Hartmann and Levy, 2005; Yang et al, 2005; Einarsson et al, 2008; Italiano et al, 2008; kumar et al, 2009）. Among the more intensely investigated geochemical phenomena there have been changes in the concentrations of dissolved ions and gases in groundwater as well as variations in the concentrations of crustal and mantle volatiles in ground gases.

关键词： TDS (total dissolved solids) conductivity earthquake precursor NW Himalayas

Modeling the impacts of temperature and precipitation changes on soil CO_2 fluxes from a Switchgrass stand recently converted from cropland

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Journal of Environmental Sciences 2016年第5期28卷 15-25页

作者： Liming Lai sandeep kumar Rajesh Chintala Vance N. Owens David Clay Joseph Schumacher Abdul-Sattar Nizami Sang Soo Lee Rashad Rafique Department of Plant Science South Dakota State University Brookings South Dakota 57007 USA. North Central Sun Grant Center South Dakota State University Brookings South Dakota 57007 USA Center of Excellence in Environmental Studies (CEES) King Abdulaziz University Abdullah Sulayman Jeddah 22254 Saudi Arabia kangwon National University Chuncheon 200-701 South Korea Joint global Change Research Institute Pacific Northwest National Lab College Park Maryland 20740 USA

Switchgrass（Panicum virgatum L.） is a perennial C_4 grass native to North America and successfully adapted to diverse environmental conditions. It offers the potential to reduce soil surface carbon dioxide（CO_2） fluxes and mitigate climate change. However, information on how these CO_2 fluxes respond to changing climate is still lacking. In this study, CO_2 fluxes were monitored continuously from 2011 through 2014 using high frequency measurements from Switchgrass land seeded in 2008 on an experimental site that has been previously used for soybean（Glycine max L.） in South Dakota, USA. DAYCENT, a process-based model, was used to simulate CO_2 fluxes. An improved methodology CPTE[Combining Parameter estimation（PEST） with ＂Trial and Error＂ method] was used to calibrate DAYCENT. The calibrated DAYCENT model was used for simulating future CO_2 emissions based on different climate change scenarios. This study showed that：（i） the measured soil CO_2 fluxes from Switchgrass land were higher for 2012 which was a drought year, and these fluxes when simulated using DAYCENT for long-term（2015–2070） provided a pattern of polynomial curve;（ii） the simulated CO_2 fluxes provided different patterns with temperature and precipitation changes in a long-term,（iii） the future CO_2 fluxes from Switchgrass land under different changing climate scenarios were not significantly different, therefore, it can be concluded that Switchgrass grown for longer durations could reduce changes in CO_2 fluxes from soil as a result of temperature and precipitation changes to some extent.

关键词： Carbon dioxide Switchgrass DAYCENT Climate change

Modulating the Intestinal Microbiota:Therapeutic Opportunities in Liver Disease

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Journal of Clinical and Translational Hepatology 2020年第1期8卷 87-99页

作者： Cyriac Abby Philips Philip Augustine Praveen kumar Yerol Ganesh Narayan Ramesh Rizwan Ahamed Sasidharan Rajesh Tom George sandeep Kumbar The Liver Unit Monarch Liver Lab and Division of GastroenterologyCochin Gastroenterology GroupErnakulam Medical CentreKochiKeralaIndia Department of Gastroenterology State Government Medical CollegeThrissurKeralaIndia Department of Gastroenterology Aster MedcityKochiKeralaIndia

Gut microbiota has been demonstrated to have a significant impact on the initiation,progression and development of complications associated with multiple liver ***,nonalcoholic fatty liver diseases,including nonalcoholic steato-hepatitis and cirrhosis,severe alcoholic hepatitis,primary scle-rosing cholangitis and hepatic encephalopathy,have strong links to dysbiosis–or a pathobiological change in the *** this review,we provide clear and concise discussions on the human gut microbiota,methods of identifying gut microbiota and its functionality,liver diseases that are affected by the gut microbiota,including novel associations under research,and provide current evidence on the modulation of gut microbiota and its effects on specific liver disease conditions.

关键词： Microbiome Metagenomics NGS Cirrhosis Illumina

Thin Film Encapsulation at Low Temperature Using Combination of Inorganic Dyad Layers and Spray Coated Organic Layer

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Journal of Encapsulation and Adsorption Sciences 2017年第4期7卷 140-148页

作者： sandeep kumar Monica Katiyar Department of Materials Science and Engineering Indian Institute of Technology Kanpur India National Centre for Flexible Electronics Indian Institute of Technology Kanpur India

Organic devices have many advantages such as low material consumption and low energy requirements, but they have serious issues regarding long term stability. Hence we need to develop a barrier film which solves this problem. Initially, the organic devices were fabricated on glass and were encapsulated using glass and epoxy (as sealant). Gradually there was a need to shift on to flexible substrates which required encapsulation to be flexible as well. Therefore, the motivation of the work is to develop thin film encapsulation that can be made flexible. The low temperature PECVD grown films of SiOx and SiNxwere used as the barrier film. Alternate inorganic layers (2-dyads) provided barrier of ~10-2 g/m2 day and increasing the number of dyads to five improved the water vapor transmission rate (WVTR) only by one order of magnitude. However, introducing organic layers in this structure resulted in WVTR value of order 10-5 g/m2 day. The organic layers were deposited by spray technique.

关键词： Thin Film Encapsulation PECVD Organic Inorganic Silicon Oxide Silicon Nitride