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Structural,magnetic and dielectric properties of nano-crystalline Ni-doped BiFeO_(3) ceramics formulated by self-propagating high-temperature synthesis

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journal of Advanced Ceramics 2013年第2期2卷 135-140页

作者： Yogesh A.chaudhari Chandrashekhar M.MAHAjAN prashant P.jAGTAP Subhash T.BENDRE Department of Physics School of Physical SciencesNorth Maharashtra UniversityJalgaon 425001India Department of Engineering Sciences and Humanities(DESH) SRTTC-FOEKamshetPune 410405India Department of Engineering Sciences and Humanities(DESH) Vishwakarma Institute of Technology(VIT)Pune 411037India

Ni-doped BiFeO_(3) powders with the composition BiFe_(1-x)Ni_(x)O_(3)(x=0.05,0.1 and 0.15)were prepared by a self-propagating high-temperature synthesis(SHS),using metal nitrates as oxidizers and glycine as *** X-ray diffraction(XRD)patterns depict that Ni-doped BiFeO_(3) ceramics crystallize in a rhombhohedral *** scanning electron micrographs of Ni-doped BiFeO_(3) ceramics show a dense morphology with interconnected *** is found that,the room-temperature magnetization measurements in Ni-incorporated BiFeO_(3) ceramics give rise to nonzero *** magnetization of Ni-doped BiFeO_(3) ceramics is significantly enhanced when Ni doping concentration reaches to x=0.1 at 5 *** variations of dielectric constant with temperature in BiFe_(0.95)Ni_(0.05)O_(3),BiFe_(0.9)Ni_(0.1)O_(3) and BiFe_(0.85)Ni_(0.15)O_(3) samples exhibit clear dielectric anomalies approximately around 450℃,425℃and 410℃respectively,which correspond to antiferromagnetic to paramagnetic phase transition of the parent compound BiFeO_(3).

关键词： Ni-doped BiFeO_(3) self-propagating high-temperature synthesis(SHS) X-ray diffraction(XRD) magnetic properties dielectric properties

Liver transplantation and resection in patients with hepatocellular cancer and portal vein tumor thrombosis: Feasible and effective?

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Hepatobiliary & Pancreatic Diseases International 2024年第2期23卷 123-128页

作者： prashant Bhangui Institute of Liver Transplantation and Regenerative Medicine Medanta–The MedicitySector 38GurgaonDelhi NCR 122001India

Patients with locally advanced hepatocellular cancer(HCC)and portal vein tumor thrombosis(PVTT)have a dismal prognosis since limited treatment options are available for *** recent years,effective systemic therapy,and advances in the understanding of technicalities and effectiveness of ablative therapies especially radiotherapy,have given some hope to prolong survival in *** review summarized recent evidence in literature regarding the possible role of liver resection(LR)and liver transplantation(LT)in patients with locally advanced HCC and PVTT with no extrahepatic *** therapies have helped make curative resection or LT a reality in selected *** review emphasizes on the key points to focus on when considering surgery in these patients,who are usually relegated to palliative systemic therapy *** patient selection based on tumor biology,documented downstaging based on imaging and decrease in tumor marker levels,and an adequate waiting period to demonstrate stable disease,may help obtain satisfactory long-term outcomes post LR or LT in an intention to treat strategy in patients with HCC and PVTT.

关键词： Hepatocellular carcinoma Portal vein tumour thrombosis Downstaging therapies Living donor liver transplantation and resection Outcomes

Highlights from the literature on risk assessment techniques adopted in the mining industry:A review of past contributions,recent developments and future scope

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International journal of Mining Science and Technology 2016年第4期26卷 691-702页

作者： Verma Shikha chaudhari Sharad Department of Mechanical Engineering YCCE CollegeRTMNU Department of Mechanical Engineering YCCE College

In this paper a comprehensive review is presented of risk assessment techniques adopted in the mining industry worldwide;those techniques applied in other hazardous industries and potential techniques which are robust,mature and holistic and can be implemented for the Indian mining industry in future to enhance workplace safety are also *** from the review are indicative of the fact that socio-technical complexity of industrial systems has *** developments in the area of risk management highlight the need for implementation of the latest robust techniques of risk assessment in the mining *** consideration of the present scenario,the development of a model for risk analysis having an interface between hazard identification and risk assessment,along with an interface between risk assessment and accident causation to predict if an accident will occur under given conditions,has become dire *** will increase hazard awareness and enable mine management to select and prioritize problem areas and identify safety system weaknesses in both underground and surface *** will ultimately help decision makers,risk analysts and safety managers make a major contribution in the development of workplace safety with a near-to-zero accident rate.

关键词： Risk Risk assessment Mining HazardSafety

Spatio-temporal assessment of soil salinization utilizing remote sensing derivatives,and prediction modeling:Implications for sustainable development

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Geoscience Frontiers 2024年第6期15卷 22-36页

作者： prashant Kumar Prasoon Tiwari Arkoprovo Biswas prashant Kumar Srivastava Department of Geology Centre of Advanced StudyInstitute of ScienceBanaras Hindu UniversityVaranasi 221005U.P.India Institute of Environment and Sustainable Development Banaras Hindu UniversityVaranasi 221005U.P.India

This study aims to investigate the combined use of multi-sensor datasets(Landsat 4–5&8 OLI satellite imagery,spatial resolution=30 m)coupled with field studies to evaluate spatio-temporal dynamics of soil salinization along the coastal belt in West Bengal,*** study assesses soil salinization by mapping the salinity and electrical conductivity of saturation extract(ECe)and utilizing spectral signatures for estimating soil *** SI change(%)was analyzed(2021–1995),categorizing increases in salinity levels into 5%,10%,and 50%changes possibly due to salt encrustation on the soil *** land use land cover(LULC)change map(2021–1995)demonstrates that the study area is continuously evolving in terms of ***,in the study area,soil salinity ranges from 0.03 ppt to 3.87 ppt,and ECe varies from 0.35 dSm^(-1)to 52.85 dSm^(-1).Additionally,vulnerable saline soil locations were further *** of soil salinity based on ECe reveals that 26%of samples fall into the nonsaline category,while the rest belong to the saline *** Spectral signatures of the soil samples(n=19)acquired from FieldSpec hand spectrometer show significant absorption features around 1400,1900,and 2250 nm and indicate salt *** results of reflectance spectroscopy were crossvalidated using X-ray fluorescence and scanning electron *** study also employed partial least square regression(PLSR)approach to predict ECe(r^(2)=0.79,RMSE=3.29)and salinity parameters(r^(2)=0.75,RMSE=0.51),suggesting PLSR applicability in monitoring salt-affected soils *** study’s conclusion emphasizes that remote sensing data and multivariate analysis can be crucial tools for mapping spatial variations and predicting soil *** has also been concluded that saline groundwater used for irrigation and aqua-cultural activities exacerbates soil *** study will help policymakers/farmers identify the salt degradation problem more effectivel

关键词： Hyperspectral remote sensing Scanning electron microscopy X-ray fluorescence Partial least square regression Soil salinity Salinity index

Multifunctional nanocomposites modulating the tumor microenvironment for enhanced cancer immunotherapy

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Bioactive Materials 2024年第1期31卷 440-462页

作者： prashant Sharma Mario Otto Department of Child Health University of Arizona College of Medicine-PhoenixABC1 Building425 N 5th StreetPhoenixAZ85004USA Center for Cancer and Blood Disorders(CCBD) Phoenix Children’s1919 E Thomas RdPhoenixAZ85016USA

Cancer immunotherapy has gained momentum for treating malignant tumors over the past *** blockade and chimeric antigen receptor cell therapy(CAR-T)have shown considerable potency against liquid and solid ***,the tumor microenvironment(TME)is highly immunosuppressive and hampers the effect of currently available cancer immunotherapies on overall treatment *** in the design and engineering of nanomaterials have opened new avenues to modulate the *** in the current nanocomposite technology can overcome immunosuppression and trigger robust immunotherapeutic responses by integrating synergistic functions of different *** will review recent advancements in nanomedical applications and discuss specifically designed nanocomposites modulating the TME for cancer *** addition,we provide information on the current landscape of clinical-stage nanocomposites for cancer immunotherapy.

关键词： Tumor microenvironment Nanocomposites Immunotherapeutic Cancer Immunosuppressive

Modeling of finite-size droplets and particles in multiphase flows

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Chinese journal of Aeronautics 2015年第4期28卷 974-982页

作者： prashant Khare Shanwu Wang Vigor Yang School of Aerospace Engineering Georgia Institute of Technology

The conventional point-particle approach for treating the dispersed phase in a continuous flowfield is extended by taking into account the effect of finite particle size, using a Gaussian interpolation from Lagrangian points to the Eulerian *** inter-phase exchange terms in the conservation equations are distributed over the volume encompassing the particle size, as opposed to the Dirac delta function generally used in the point-particle *** proposed approach is benchmarked against three different flow configurations in a numerical framework based on large eddy simulation（LES） turbulence ***, the flow over a circular cylinder is simulated for a Reynolds number of 3900 at 1 atm *** show good agreement with experimental data for the mean streamwise velocity and the vortex shedding frequency in the wake *** calculated flowfield exhibits correct physics, which the conventional point-particle approach fails to *** second case deals with diesel jet injection in quiescent environment over a pressure range of 1.1–5.0 *** calculated jet penetration depth closely matches *** decreases with increasing chamber pressure, due to enhanced drag force in a denser fluid ***, water and acetone jet injection normal to air crossflow is studied at1 *** calculated jet penetration and Sauter mean diameter of liquid droplets compare very well with measurements.

关键词： Droplets Finite-size effects Large eddy simulation Multiphase flow Particle-laden flow

Impact of some chlorinated pesticides on the haematology of the fish Cyprinus carpio and Puntius ticto

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journal of Environmental Sciences 2004年第4期16卷 631-634页

作者： Shanta Satyanarayan Rajesh S. Bejankiwar P.R. chaudhari j.P.Kotangale Ahana Satyanarayan National Environmental Engineering Research Institute(NEERI) Department of Civil & Environmental EngineeringNational Environmental Engineering Research Institute(NEERI)National Environmental Engineering Research Institute(NEERI)Government Medical College Nagpur 440020 India University of Windsor Windsor N9B 3P4 Ontario Canada Nagpur 440020 India Nagpur 440020 India Nagpur 440025 India

The effects of pesticides on blood characteristics and histological changes in erythrocytes of the fish species Cyprinus carpio and Puntius ticto were studied. The fishes were exposed to sub lethal concentrations of different chlorinated pesticides namely aldrin, dieldrin, DDT, BHC and chlordane for 10, 20 and 30 d in continuous flow-through test. The LC 50 values were calculated based on acute toxicity tests and the sublethal doses were arrived at for chronic bioassay studies. Results showed an increase in haemoglobin content of both Cyprinus carpio and Puntius ticto in case of aldrin and dieldrin. Haemoglobin content reduced from an initial 13 g/100 ml to 8.07 and 10.15 g/100 ml in case of Cyprinus at the end of ten days exposure to aldrin and dieldrin respectively, and gradually increased to 8.7 g/100 ml and 10.15 g/100 ml after 20 d of exposure. The haemoglobin content after 30 d exposure to aldrin and dieldrin was 10.15 g/100 ml and 11.6 g/100 ml respectively. In case of Puntius ticto, the haemoglobin content in control fishes recorded was 12.8 g/100 ml while in case of fish exposed to aldrin, the haemoglobin content reduced initially on ten days exposure to 10.15 g/100 ml and increased to 11.6 g/100 ml and 13.0 g/100 ml during twenty days and thirty days exposure respectively. This trend was also observed with dieldrin in both the fishes studied. Red blood cells were also counted in case of all the pesticides and exposure periods with respect to Cyprinus carpio and Puntius ticto. Irrespective of the species and pesticide, the RBC counts uniformly showed decreasing trend with the increase in exposure period, while packed cell volume, PCV(%) showed increasing trend with respect to increase in exposure period in case of aldrin and dieldrin in both the fishes. But DDT, BHC and chlordane showed decreasing trend in PCV(%) values with increasing periods of exposure.

关键词： histology aldrin dieldrin DDT BHC chlordane

Bi3+assisted luminescence in SrMoO_(4):Sm^(3+) red phosphors

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journal of Rare Earths 2021年第11期39卷 1336-1343,I0002页

作者： Vaibhav Chauhan prashant Dixit Praveen C.Pandey Department of Physics Indian Institute of Technology(Banaras Hindu University)Varanasi221005UPIndia

In this paper,we report synthesis of pure SrMoO_(4),Sm^(3+)(1 at%-5 at%)doped SrMoO_(4)and Bi^(3+)(1 at%-3 at%)co-doped in 4 at%Sm^(3+)doped SrMoO_(4)(SrMoO_(4):4 Sm^(3+))phosphors by solution combustion *** X-ray diffraction(XRD)analysis reveals the tetragonal phase of all samples,also Bi^(3+)co-doping supports crystallite size growth and reduces lattice *** analysis of Sm^(3+)doped SrMoO_(4)ascertains a decrease in band gap and Bi^(3+)co-doping confirms the emergence of an absorbance peak at around 308 nm attributed to Bi^(3+)energy ***(PL)analysis ascertains an increase in emission peaks for Sm^(3+)doped SrMoO_(4)up to 4%concentration,which are attributed to an electron transition from 4 G5/2 to 6 Hj(j=5/2,7/2,9/2,and 11/2)energy levels of Sm^(3+)*** have explained the effects of Bi^(3+)co-doping on the luminescence of Sm^(3+)doped SrMoO_(4).The reduced microstrain and increased crystallinity of the phosphors as a result of Bi^(3+)co-doping and their correlation with the luminescence of Sm^(3+)ions are discussed.

关键词： SrMoO_(4):Sm^(3+) Bismuth ion Photoluminescence Absorption study Crystallinity Microstrain

Moisture dependent physical properties of Lagenaria siceraria seed

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International journal of Agricultural and Biological Engineering 2013年第4期6卷 111-120页

作者： prashant Pandharinath Said Rama Chandra Pradhan Department of Farm Engineering Institute of Agricultural SciencesBanaras Hindu UniversityVaranasiUttar Pradesh 221005India

The investigation was done to evaluate the effect of moisture content on some physical properties of Lagenaria siceraria *** study was conducted at five moisture levels including 8.84%,10.10%,11.89%,12.60%and 15.10%(w.b.).Results showed that the mean value of principal dimensions,average diameters,surface area and 1000 seed mass increased linearly but aspect ratio decreased with increase in moisture *** sphericity increased in the moisture range of 8.84%to 11.89%but decreased with further raise in the moisture up to 15.10%.Gravimetric properties like bulk density increased with increase in moisture content however true density and porosity decreased linearly with increase in moisture *** of repose and terminal velocity increased linearly with moisture content of the *** coefficient of friction increased linearly with seed moisture content on five experimental surfaces(plywood,galvanized iron,glass and plastic).The information pertaining to moisture dependant physical properties of Lagenaria siceraria seeds may become an essential part in design of processing machines and its unit operations,design of dehulling,oil expression and other processing equipments.

关键词： Lagenaria siceraria physical properties angle of repose aspect ratio gravimetric properties sphericity