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Heavy metal phytoextraction by Sedum alfredii is affected by continual clipping and phosphorus fertilization amendment

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Journal of Environmental Sciences 2012年第3期24卷 376-386页

作者： Huagang Huang Tingqiang Li d.k.gupta Zhenli He Xiao-e Yang Bingnan Ni Mao Li Ministry of Education key Laboratory of Environmental Remediation and Ecosystem Health Zhejiang UniversityHangzhou 310029China departamento de Bioquimica Biologia Cellular y Molicular de PlantasEstacion Experimental del ZaidinCSICC/Profesor Albareda No 1E-180080GranadaSpain University of Florida Institute of Food and Agricultural SciencesIndian River Research and Education CenterFort PierceFlorida 34945USA

Improving the efficacy of phytoextraction is critical for its successful application in metal contaminated soils. Mineral nutrition affects plant growth and metal absorption and subsequently the accumulation of heavy metal through hyper-accumulator plants. This study assessed the effects of di-hydrogen phosphates （kH2PO4, Ca（H2PO4）2, NaH2PO4 and NH4H2PO4） application at three levels （22, 88 and 352 mg P/kg soil） on Sedum alfredii growth and metal uptake by three consecutive harvests on aged and Zn/Cd combined contaminated paddy soil. The addition of phosphates （P） significantly increased the amount of Zn taken up by S. alfredii due to increased shoot Zn concentration and dry matter yield （dMY）（P 〈 0.05）. The highest phytoextraction of Zn and Cd was observed in kH2PO4 and NH4H2PO4 treatment at 352 mg P/kg soil. The amount of Zn removed by phytoextraction increased in the order of 1st clipping 〈 2nd clipping 〈 3rd clipping, and for Cd extraction the order was 2nd clipping 〈 1st clipping 〈 3rd clipping. These results indicate that the application of P fertilizers coupled with multiple cuttings can enhance the removal of Zn and Cd from contaminated soils by S. alfredii, thus shortening the time needed for accomplishing remediation goals.

关键词： soluble phosphates clipping phytoremediation heavy metal Sedum alfredii

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Comprehensive Suitability Evaluation of Tea Crops Using GIS and a Modified Land Ecological Suitability Evaluation Model

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Pedosphere 2012年第1期22卷 122-130页

作者： LI Bo ZHANG Feng ZHANG Li-Wen HUANG Jing-Feng JIN Zhi-Feng d.k.gupta College of Public Administration Zhejiang UniversityHangzhou 310058(China) Institute of Agricultural Remote Sensing and Information Technology Zhejiang UniversityHangzhou 310058(China) Zhejiang Climatic Centre Zhejiang Meteorological BureauHangzhou 310017(China) departamet of Biochemistry Molecular Cell Biology of Plant Experimental InstitutionGranada(Spain)

Tea （Camellia sinensis） is one of the most valuable cash crops in southern China; however, the planting distribution of tea crops is not optimal and the production and cultivation regions of tea crops are restricted by law and custom. In order to evaluate the suitability of tea crops in Zhejiang Province, the annual mean temperature, the annual accumulated temperature above 10 ℃, the frequency of extremely low temperature below -13 ℃, the mean humidity from April to October, slope, aspect, altitude, soil type, and soil texture were selected from climate, topography, and soil factors as factors for land ecological evaluation by the delphi method based on the ecological characteristics of tea crops. These nine factors were quantitatively analyzed using a geographic information system （GIS）. The grey relational analysis （GRA） was combined with the analytic hierarchy process （AHP） to address the uncertainties during the process of evaluating the traditional land ecological suitability, and a modified land ecological suitability evaluation （LESE） model was built. Based on the land-use map of Zhejiang Province, the regions that were completely unsuitable for tea cultivation in the province were eliminated and then the spatial distribution of the ecological suitability of tea crops was generated using the modified LESE model and GIS. The results demonstrated that the highly, moderately, and non-suitable regions for the cultivation of tea crops in Zhejiang Province were 27552.66, 42 724.64, and 26507.97 km2, and accounted for 28.47%, 44.14%, and 27.39% of the total evaluation area, respectively. Validation of the method showed a high degree of coincidence with the current planting distribution of tea crops in Zhejiang Province. The modified LESE model combined with GIS could be useful in quickly and accurately evaluating the land ecological suitability of tea crops, providing a scientific basis for the rational distribution of tea crops and acting as a reference to land pol

关键词： analytic hierarchy process (AHP) grey relational analysis (GRA) soil temperature topography

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development of a validated UPLC-qTOF-MS/MS method for determination of bioactive constituent from Glycyrrhiza glabra

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Journal of Pharmaceutical Analysis 2013年第3期3卷 205-210页

作者： d.k.gupta M.k.Verma R.Anand R.k.khajuria Natural Product Chemistry division CSIR-Indian Institute of Integrative Medicine Analytical Chemistry division CSIR-Indian Institute of Integrative Medicine

An ultra-performance liquid chromatography quadrupole time of flight mass spectrometry （UPLC-qTOF-MS/MS） method was developed and validated for the simultaneous determination of glycyrrhizin and glycyrrhetic acid. These analytes were separated on a reverse phase C18 column using a mobile phase of acetonitrile：2% acetic acid in water （75：25, v/v） with a flow rate of 200 μL/min. The qTOF-MS was operated under multiple reaction monitoring （MRM） mode using the electrospray ionization （ESI） technique with positive ion polarity. A comparison of three different extraction techniques i.e. accelerated solvent extraction （ASE）, extraction under ultrasonic waves （USW） and the classical extraction by percolation （CE） method was done and quantification of these extracts was also carried out by the proposed method.

关键词： Glycyrrhiza glabra Glycyrrhizin Glycyrrhetic acid Accelerated solventextraction Ultrasonication Ultra-performanceliquid chromatographyquadrupole time offlight mass spectrometer(UPLC-qTOF-MS/MS)

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在孟买高油田岩心和测井的综合分析研究

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国外油气勘探 1984年第1期 69-72页

作者： d.k.gupta 杜小涛

对孟买高油田 L-Ⅲ层的岩芯作了综合岩石物理分析,以确定各种测井和储集层参数,建立它们之间的关系。由此发现所确立的参数及其内在关系与通常用测井曲线进行地层评价所采用的数值很不相同。通过用新确立的参数解释测井资料对 L-Ⅲ碳酸... 详细信息

对孟买高油田 L-Ⅲ层的岩芯作了综合岩石物理分析,以确定各种测井和储集层参数,建立它们之间的关系。由此发现所确立的参数及其内在关系与通常用测井曲线进行地层评价所采用的数值很不相同。通过用新确立的参数解释测井资料对 L-Ⅲ碳酸岩储集层重新进行了评价。结果,估算出的储量比用一般参数估算的储量增加35%。重新估算的储量与压力研究所预测的储量是一致的。自1974年以来,石灰岩Ⅲ(L-Ⅲ)储集层一直是孟买高油田钻探的主要对象。几年来,

关键词：泥质含量中子核子骨架密度含水饱和度储集层参数孔隙率孔隙度矿物燃料矿床油田测井邦贝印度孟买

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Investigating the Evolution of Amati Parameters with Redshift

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Research in Astronomy and Astrophysics 2024年第1期24卷 188-200页

作者： Meghendra Singh darshan Singh kanhaiya Lal Pandey dinkar Verma Shashikant gupta delhi Metro Rail Corporation Limited New Delhi 110001India Gd Goenka University Gurugram 122103India department of Physics Mata Raj Kaur Institute of Engineering and TechnologyRewari 123401India department of Physics School of Advanced SciencesVellore Institute of TechnologyVellore 632014India

Gamma-ray bursts(GRBs) are among the brightest objects in the Universe and, hence, can be observed up to a very high redshift. Properly calibrated empirical correlations between intensity and spectral correlations of GRBs can be used to estimate the cosmological parameters. However, the possibility of the evolution of GRBs with redshift is a long-standing puzzle. In this work, we used 162 long-duration GRBs to determine whether GRBs below and above a certain redshift have different properties. The GRBs are split into two groups, and we fit the Amati relation for each group separately. Our findings demonstrate that estimations of the Amati parameters for the two groups are substantially dissimilar. We perform simulations to investigate whether the selection effects could cause the difference. Our analysis shows that the differences may be either intrinsic or due to systematic errors in the data, and the selection effects are not their true origin. However, in-depth analysis with a new data set comprised of 119 long GRBs shows that intrinsic scatter may partly be responsible for such effects.

关键词： Cosmology gamma rays:general (cosmology:)large-scale structure of universe galaxies:high-redshift

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Molecular mechanisms of aflatoxin neurotoxicity and potential neuroprotective agents

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Food Science and Human Wellness 2024年第5期13卷 2445-2455页

作者： Chongshan dai Erjie Tian Hui Li Subhajit das gupta Zhihui Hao Zhanhui Wang Tony Velkov Jianzhong Shen National key Laboratory of Veterinary Public Health and Safety Beijing Key Laboratory of Detection Technology for Animal-Derived Food SafetyCollege of Veterinary MedicineChina Agricultural UniversityBeijing 100193China Guangdong Laboratory for Lingnan Modern Agriculture Guangzhou 510642China College of Animal Science and Technology Henan University of Science and TechnologyLuoyang 471023China Beijing key Laboratory of diagnostic and Traceability Technologies for Food Poisoning Beijing Center for Disease Prevention and ControlBeijing 100013China department of Internal Medicine University of Texas Southwestern Medical CenterDallas 75230USA Monash Biomedicine discovery Institute Department of PharmacologyMonash UniversityVictoria 3800Australia

Aflatoxins(AFTs)represent one of the most notorious classes of deadly mycotoxins produced by certain fungi that are found on agricultural *** are highly toxic to mammals and are known to cause a series of detrimental effects,including neuro-,hepato-,nephron-,and *** this original review we summarize the mechanisms of aflatoxin-induced neurotoxicity and the clinical potential of novel neuroprotective *** B1(AFB1)is the most toxic congener among the 21 identified *** studies have shown that food borne exposure to AFB1 and/or its metabolites often leads to fatal neurotoxicity in animals and *** studies indicated that AFB1 exposure could induce abnormal behavioral changes,including anxiety,lethargy disorders,depression-like behavior,cognitive,learning and memory defects,and decreased feeding ***,AFB1 exposure has been associated with lipid peroxidation,ablation of non-enzymatic and enzymatic antioxidant defense systems and decreased neurotransmitter ***1 exposure has also been shown to induce dNA damage,apoptosis,pyroptosis,and mitochondrial dysfunction in the brain *** signaling pathways,including gasdermin d,toll like receptor 2(TLR2),TLR4,Akt,NF-κB,ERk/MAPk,protein kinase C(PkC),and mitochondrial apoptotic pathways have been shown to participate in AFB1-induced neuronal or astrocyte cell *** these pathways by small molecules(e.g.,quercetin,curcumin,and gallic acid,and dimethyl fumarate),Chinese herbal extracts(e.g.,Artichoke leaf extract,Chelidonium majus ethanolic extract,pumpkin extract,and Crocus sativus ***),and probiotic supplements could effectively improve AFB1-induced neurobehavioral abnormalities and *** date,the precise molecular mechanisms of AFB1-induced neurotoxicity and potential neuroprotective agents remain *** the present review,the clinical manifestations,molecular mechanisms,and potential neuroprotective agents of AFB1

关键词： Aflatoxin B1(AFB1) Neurotoxicity Molecular mechanisms Chemical preventions

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Electronic properties of 2d materials and their junctions

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Nano Materials Science 2024年第1期6卷 1-23页

作者： Taposhree dutta Neha Yadav Yongling Wu Gary J.Cheng Xiu Liang Seeram Ramakrishna Aoussaj Sbai Rajeev gupta Aniruddha Mondal Zheng Hongyu Ashish Yadav department of Chemistry Indian Institute of Engineering Science and TechnologyShibpurWest Bengal711103India Center for Advanced Laser Manufacturing(CALM) Shandong University of TechnologyZibo255000PR China School of Industrial Engineering Purdue University315 N.Grant St.West LafayetteIN47907United States Birck Nanotechnology Center Purdue University1205 W State St.West LafayetteIN47907United States Advanced Materials Institute Qilu University of TechnologyShandong Academy of SciencesJinan250014PR China Nanoscience and Nanotechnology Initiative National University of Singapore10 Kent Ridge Crescent119260Singapore Faculty of Applied Phsyics and Mathematics Gdansk University of Technology Narutowicza 11/1280233GdanskPoland department of Physics School of EngineeringUniversity of Petroleum&Energy StudiesDehradun248007UttarakhandIndia department of Physics National Institute of Technology DurgapurDurgapur713209West BengalIndia

With an extensive range of distinctive features at nano meter-scale thicknesses,two-dimensional(2d)materials drawn the attention of the scientific *** tremendous advancements in exploratory research on 2d materials,knowledge of 2d electrical transport and carrier dynamics still in its ***,here we highlighted the electrical characteristics of 2d materials with electronic band structure,electronic transport,dielectric constant,carriers *** atomic thinness of 2d materials makes substantially scaled field-effect transistors(FETs)with reduced short-channel effects conceivable,even though strong carrier mobility required for high performance,low-voltage device *** also discussed here about factors affecting 2d materials which easily enhanced the activity of those materials for various ***,Those 2d materials used in state-of-the-art electrical and optoelectronic devices because of the extensive nature of their electronic band structure.2d materials offer unprecedented freedom for the design of novel p-n junction device topologies in contrast to conventional bulk *** also,describe the numerous 2d p-n junctions,such as homo junction and hetero junction including mixed dimensional ***,we talked about the problems and potential for the future.

关键词： 2d materials Electrical properties p-n junctions Mixed hereto junctions Homo junctions Electrical transport

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User Perspective of Misplaced PPIUCd and Factors Resulting in PPIUCd Removal: Qualitative Pilot Study

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Open Journal of Epidemiology 2024年第3期14卷 517-532页

作者： A. G. Radhika Rashmi gupta Pooja kashyap Ravleen Bakshi department of Obstetrics and Gynecology University College of Medical Sciences & Guru Teg Bahadur Hospital Dilshad Garden Delhi India GTB Hospital Delhi India Indian Council of Medical Research Delhi India

Objective: The aim of the current study was to assess the impact of operative interventions for misplaced device among women who opted for PPIIUCd and the evaluation of reasons for PPIUCd removal within the follow up period of two years. design: A descriptive exploratory study was conducted over three months among fourteen PPIUCd acceptors at a tertiary care health facility in delhi, India. Face-to-face & telephonic in-depth interviews were conducted with a selected sample of PPIUCd acceptors who had later opted for its removal. Results: Participants (n = 14) aged 24 – 40 exhibited generally positive attitudes towards PPIUCds indicating an indicate an understanding of the importance of PPIUCd in preventing unintended pregnancies. Menstrual disturbance and misplaced IUCd were major reasons for removal. despite their own experience necessitating the removal of IUCd, positive experience by other family members (mothers in law) in this study helped to keep the confidence on the contraceptive. Themes included (a) general experience of PPIUCd use (b) Health Facility accessed for removal of IUCd (c) Would she recommend it to others? (d) preferred contraceptive after removal of IUCd. Conclusion: Misplaced IUCd, missing thread, menstrual irregularities, and pain are all associated with PPIUCd and are important reasons for dissatisfaction. Appropriate, timely and supportive individualized care that address knowledge gaps, societal perceptions, and healthcare system challenges would certainly help in reducing dissatisfaction due to PPIUCd and thereby the removal rates.

关键词： Postpartum Intrauterine device PPIUCd LARC Long Acting Reversible Contraception Postpartum Family Planning Contraception

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Chemical profiling of bioactive compounds in the methanolic extract of wild leaf and callus of Vitex negundo using gas chromatographymass spectrometry

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World Journal of Experimental Medicine 2024年第1期14卷 78-87页

作者： Gunjan Garg Alok Bharadwaj Shweta Chaudhary Veena gupta School of Biotechnology Gautam Buddha UniversityGreater Noida 201312Uttar PradeshIndia Biotechnology GLA UniversityMathura 281406Uttar PradeshIndia division of Germplasm Conservation Indian Council of Agricultural Research-National Bureau of Plant Genetic ResourcesNew Delhi 110012New DelhiIndia

BACkGROUNd The investigation of plant-based therapeutic agents in medicinal plants has revealed their presence in the extracts and provides the vision to formulate novel techniques for drug *** negundo(***),a perennial herb belonging to the Varbanaceae family,is extensively used in conventional *** To determine the existence of therapeutic components in leaf and callus extracts from wild *** plants using gas chromatography-mass spectrometry(GCMS).METHOdS In this study,we conducted GC-MS on wild plant leaf extracts and correlated the presence of constituents with those in callus *** growth regulators such as 6-benzylaminopurine(BAP),2,4-dichlorophenoxyacetic acid(2,4-d),α-naphthylacetic acid(NAA),and di-phenylurea(dPU)were added to plant leaves and in-vitro callus and grown on MS *** The results clearly indicated that the addition of BAP(2.0 mg/L),2,4-d(0.2 mg/mL),dPU(2.0 mg/L)and 2,4-d(0.2 mg/mL)in MS medium resulted in rapid callus *** plant profile of Vitex extracts by GC-MS analysis showed that 24,10,and 14 bioactive constituents were detected in the methanolic extract of leaf,green callus and the methanolic extract of white loose callus,*** Octadecadienoic acid,hexadecanoic acid and methyl ester were the major constituents in the leaf and callus methanolic *** acid was the most common constituent in all *** maximum concentration of octadecadienoic acid in leaves,green callus and white loose callus was 21.93%,47.79%and 40.38%,*** findings demonstrate that the concentration of octadecadienoic acid doubles in-vitro compared to *** addition to octadecadienoic acid;butyric acid,benzene,1-methoxy-4-(1-propenyl),dospan,tridecanedialdehyde,methylcyclohexenylbutanol,chlorpyrifos,n-secondary terpene diester,anflunine and other important active compounds were also *** these components were only available in callus formed in-vit

关键词： Leaf extracts Callus extracts Methanolic extract Octadecadienoic acid Hexadecanoic acid Methyl ester Gas chromatography-mass spectrometry analysis

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Efficacy of a diabetes Specific Nutritional Supplement (dSNS) on Glycemic Response in Prediabetic Adults: A Two-Armed, Open-Labelled Randomized Controlled Study

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Food and Nutrition Sciences 2024年第7期15卷 612-643页

作者： deepti khanna kejal Joshi Reddy Hema S. Gopalan Jaladhi Bhatt Jayanti gupta Simran Sethi Parth Joshi Manoj Pareek department of R&d Hindustan Unilever Limited Gurugram India Mumbai India Cliantha Research Ahmedabad India

It is well known that diabetes Specific Nutritional Supplements (dSNSs) are linked to improved glycemic control in individuals with diabetes. However, data on efficacy of dSNSs in prediabetics is limited. This was a two-armed, open-labelled, randomized controlled six-week study on 199 prediabetics [30 - 65 years;Glycosylated Hemoglobin (HbA1c) 5.7% - 6.4% and/or Fasting Blood Glucose (FBG) 100-125 mg/dl]. Two parallel phases were conducted: Acute Blood Glucose Response (ABGR) and Intervention phase. Prediabetic participants were randomized into test (n = 100) and control (n = 99). The primary objective was to assess the ABGR of dSNS versus an isocaloric snack, measured by incremental Area under the Curve (iAUC). Test and control received 60 g of dSNS and 56 g of isocaloric snack (cornflakes) respectively, both in 250 ml double-toned milk on visit days 1, 15, 29 and 43. Postprandial Blood Glucose (PPG) was estimated at 30, 60, 90, 120, 150 and 180 minutes. during the 4 weeks intervention phase, the test group received dSNS with lifestyle counselling (dSNS + LC) and was compared with the control receiving lifestyle counselling alone (LC alone). Impact was studied on FBG, HbA1C, anthropometry, body composition, blood pressure, nutrient intake, and physical activity. The impact of dSNS was also studied using CGM between two 14-day phases: CGM1 baseline (days 1 - 14) and CGM2 endline (days 28 - 42). dSNS showed significantly lower PPG versus isocaloric snack at 30 (p 12, and chromium were reported by dSNS + LC versus LC alone. No other significant changes were reported between groups. It may be concluded that dSNS may be considered as a snack for prediabetic or hyperglycemic individuals requiring nutritional support for improved glycemic control.

关键词： diabetes Specific Nutritional Supplement Prediabetes Acute Blood Glucose Response Incremental Area under Curve Lifestyle Counselling

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