检索结果-南通市图书馆

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：社会技术风险评估采矿业文献综述风险分析模型危险行业安全管理人员工作场所

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

在线全文

学校读者我要写书评

暂无评论

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

plastic scintillator detector for qualitative and quantitative measurements of gamma radiation

在线全文

学校读者我要写书评

暂无评论

Radiation Detection Technology and Methods 2023年第4期7卷 578-588页

作者： Vaishali M.Thakur Nitin Bhosale Amit Jain Mukesh Sharma L.M.chaudhari probal Chaudhury Radiation Safety Systems Division Bhabha Atomic Research CentreTrombayMumbai400085India Department of physics Nowrosjee Wadia CollegePune411001India

Background plastic scintillator detectors are rugged and easily manufactured in desired shape,sizes and response time to gamma radiation is prompt as compared with any other scintillator *** popular these detectors are used in radiation monitors one of the application to restrict radioactive material *** are used in gross counting mode to know the presence of *** secondary survey is required to know the nature of the *** The feasibility study of Cylindrical plastic Scintillator Detector(CpSD)was carried out for the qualitative and quantitative assessment of gamma emitting *** In this work limited gamma spectrometry was carried out using NE110 equivalent cylindrical plastic scintillating material of 5.1 cm diameter and 100 cm *** is optically coupled to photomultiplier tube(pMT).The detector signal is processed using preamplifier,shaping amplifier and further analysed by a multi channel analyser(MCA).CpSD gamma spectrum consists of Compton continuum and gaussian shaped Compton edge energy(λ_(e))appearing as Compton maxima energy(λ_(max)).photon transport simulation is used to characterizeλ_(max) as a signature for radionuclides emitting gamma energy/*** case of unresolved gamma energies,it appears as weighted effective Compton maxima *** prominent gamma energies observed across nuclear industries are in the energy range 0.03–3 *** is grouped as low energy,intermediate energy,high energy and ultra-high energy *** simulated spectrum is obtained suing gaussian broadening parameters deduced from experimentally measured *** efficiency response function is developed from simulated response of detector to standard gamma sources under known source detector *** The mono energetic gamma emitting radioisotopes are identified againstλ_(max) from data *** analysis of spectrum is used to discriminate artificial radioactive materi

关键词： plastic scintillator detector gaussian broadening Compton edge Compton maxima Weighted effective Compton maxima gamma spectrum Multi-channel analyzer

A gFp-based bacterial biosensor with chromosomally integrated sensing cassette for quantitative detection of Hg(Ⅱ) in environment

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2012年第5期24卷 963-968页

作者： Himanshu priyadarshi Absar Alam gireesh-Babu p Rekha Das pankaj Kishore Shivendra Kumar Aparna chaudhari College of Fisheries (CAU) Lembucherra Tripura 799210 India Department of Fish genetics and Biotechnology Central Institute of Fisheries Education Department of Fish processing Technology Central Institute of Fisheries Education Department of Fish Nutrition and Biochemistry Central Institute of Fisheries Education Krishi Vigyan Kendra Rajendra Agricultural University

A mercury biosensor was constructed by integrating biosensor genetic elements into E. coli JM109 chromosome in a single copy number, using the attp/attB recombination mechanism of λ phage. The genetic elements used include a regulatory protein gene （merR） along with operator/promoter （O/p） derived from the mercury resistance operon from pDU1358 plasmid of Serratia marcescens. The expression of reporter gene gfp is also controlled by merR/O/p. Integration of the construct into the chromosome was done to increase the stability and precision of the biosensor. This biosensor could detect Hg（Ⅱ） ions in the concentration range of 100–1700 nmol/L, and manifest the result as the expression of gFp. The gFp expression was significantly different （p 0.05） for each concentration of inducing Hg（Ⅱ） ions in the detection range, which reduces the chances of misinterpretation of results. A model using regression method was also derived for the quantification of the concentration of Hg（Ⅱ） in water samples.

关键词： attp/attB integration E. coli biosensor gFp mercury

Formulation and characterization of extruded and spheronized pellets using pectin and crosslinking agents

在线全文

学校读者我要写书评

暂无评论

Journal of Chinese pharmaceutical Sciences 2014年第11期23卷 790-798页

作者： pallavi M.chaudhari pravin D.chaudhari padmashree Dr.D.Y.patil College of pharmacy Akurdi Pune-411044 India p.E.Society's Modern College of pharmacy NigdiPune-411044 India

The aim of this study was to prepare pellets of gliclazide by extrusion spheronization process by use of two methods in situ cross linking method and interfacial complexation method and to study the effect of different cross linking agents on the formed pellets. Extrusion/spheronization being an established technique for producing spherical pellets so this technique was used to prepare pellets. The gliclazide pellets prepared by extrusion-spheronization techniques and then the formed pellets were coated with pectin solution by interfacial complexation method. The effect of cross-linkers calcium chloride and aluminium chloride concentration, by in situ cross linking on properties of gliclazide pellets like swelling and drug release were studied. The formed pellets were subjected to swelling, analysis of morphology, in dissolution and vivo studies. Most of the pellets were of acceptable shape. From the results calcium chloride when coated with pectin, retarded drug release. As the concentration of calcium chloride increased, it led to slow release of the drug. This may be due to the water solubility of calcium salt, which induced cross linking with pectin. Thus pellets with calcium chloride cross linked with pectin were beneficial, because it retarded the release of the drug. Though the release from interfacial coated pellets was retarded, it was less as compared to the in situ formed pellets. The in vivo studies on alloxan-induced diabetic rats indicated the significant hypoglycemic effect that was observed 24 h after oral administration of optimized pellets. Thus, the developed and optimized pellets were suitable for prolonged systemic absorption of gliclazide to maintain lower blood glucose level and improved patient compliance. The results suggested that the in situ cross linking pellets were able to retard the release of gliclazide greater than the interfacial complexation method. Therefore, this approach has been effectively achieved.

关键词： Extrusion-spheronization gliclazide pellets pectin Anti-diabetic activity

Effect of Biosynthesized Silver Nanoparticles on Staphylococcus aureus Biofilm Quenching and prevention of Biofilm Formation

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2012年第1期4卷 34-39页

作者： pratik R.chaudhari Shalaka A.Masurkar Vrishali B.Shidore Suresh p.Kamble Center for Biotechnology Pravara Institute of Medical Sciences

The development of green experimental processes for the synthesis of nanoparticles is a need in the field of nanotechnology. The synthesis of silver nanoparticles was achieved using Bacillus cereus supernatant and1 m M silver nitrate. 100 m M glucose was found to quicken the rate of reaction of silver nanoparticles ***-visible spectrophotometric analysis was carried out to assess the synthesis of silver nanoparticles. The synthesized silver nanoparticles were further characterized by using Nanoparticle Tracking Analyzer(NTA),Transmission Electron Microscope and Energy Dispersive X-ray spectra. These silver nanoparticles showed enhanced quorum quenching activity against Staphylococcus aureus biofilm and prevention of biofilm formation which can be seen under inverted microscope(40 X). The synergistic effect of silver nanoparticles along with antibiotics in biofilm quenching was found to be effective. In the near future, silver nanoparticles could be used in the treatment of infections caused by highly antibiotic resistant biofilm.

关键词： Silver Nanoparticles green Synthesis Bacillus cereus Biofilm Quorum Quenching

Rapid Biosynthesis of Silver Nanoparticles Using Cymbopogan Citratus (Lemongrass) and its Antimicrobial Activity

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2011年第3期3卷 189-194页

作者： Shalaka A.Masurkar pratik R.chaudhari Vrishali B.Shidore Suresh p.Kamble pravara Institute of Medical Sciences

The present study deals with the rapid green synthesis of silver nanoparticles using fresh leaves of Cymbopogan Citratus(Lemongrass). Silver nanoparticles were formed within 8～10 minutes by microwave irradiation using aqueous solution of Ag NO3(1 m M) with fresh leaves extract of Cymbopogan Citratus. The synthesized silver nanoparticles were characterized by using UV-visible spectrophotometer analysis, nanoparticle tracking analyzer, transmission electron microscope and energy dispersive X-ray spectra. The antibacterial activity of these nanoparticles was studied against multiple drug resistant hospital isolates of ***, ***,*** and hospital isolates of S. typhi, ***. Also, the antifungal activity of these nanoparticles was studied against ***(hospital isolate) and ***(NCIM 616). The synergistic effect of silver nanoparticles along with antibiotics was also studied against multiple drug resistant hospital isolates and found to be effective. The extracellular synthesis of Silver nanoparticles using leaves of Cymbopogan Citratus appears to be rapid and eco-friendly.

关键词： green synthesis Cymbopogan Citratus Nanoparticle tracking analyzer Transmission electron microscope Energy dispersive X-ray spectra

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

在线全文

学校读者我要写书评

暂无评论

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

Design and development of a plastic scintillator based whole body β/γ contamination monitoring system

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2021年第5期32卷 33-42页

作者： Vaishali M.Thakur Amit Jain p.Ashokkumar Rekha Anilkumar pravin Sawant probal Chaudhury L.M.chaudhari Radiation Safety Systems Division Bhabha Atomic Research CentreMumbai 400085India Health physics Division Bhabha Atomic Research CentreMumbai 400085India Department of physics Nowrosjee Wadia CollegePuneMaharashtra 411001India

plastic scintillation detectors based whole body β/γ contamination monitors are developed for use in radiation *** microcontroller-based multi-detector system uses 13 plastic scintillator detectors,with minimized dead detection zones,monitoring the whole body,and conforming to the contamination limit prescribed by the regulatory *** system has the features for monitoring hands,feet,head,and faceβ/γusing contamination monitors and portal exit *** can detect gamma sources at a dose rate of 10 n gyh^(-1).The system is calibrated using b sources^(90)Sr/^(90)Y,^(204)Tl,and^(36)Cl,and the efficiency is found to be 29%,22%,and 18%,***β/γcontaminationis0.15 Bqcm^(-2),which is significantly less than the minimum detection objectives on head,face,hands,and feet.

关键词： plastic scintillation detector Contamination monitor Microcontroller Minimum Detection Objective(MDO) Minimum Detection Concentration(MDC)

Assessment of distortion in watermarked geospatial vector data using different wavelets

在线全文

学校读者我要写书评

暂无评论

geo-Spatial Information Science 2015年第2期18卷 124-133页

作者： Sangita ZOpE-chaudhari parvatham VENKATACHALAM Krishna Mohan BUDDHIRAJU Centre of Studies in Resources Engineering Indian Institute of Technology BombayMumbaiIndia

With the rapid growth of the Internet,the copyright protection problem occurs frequently,and unauthorized copying and distributing of geospatial data threaten the investments of data *** watermarking is a possible solution to solve this ***,watermarking causes modifications in the original data resulting in distortion and affects accuracy,which is very important to geospatial vector *** article provides distortion assessment of watermarked geospatial data using wavelet-based invisible *** wavelets at different wavelet decomposition levels are used for accuracy evaluation with the help of error measures such as maximum error and mean square *** correlation is used as a similarity index between original and extracted *** is observed that the increase in the strength of embedding increases visual *** wavelet outperforms the other wavelets,and the third wavelet decomposition level is proved to be optimal level for watermarking.

关键词： digital watermarking geospatial vector data wavelets discrete wavelet transform(DWT) distortion