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A generalized synthesis method for freestanding multiferroic twodimensional layered supercell oxide films via a sacrificial buffer layer

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Nano Research 2023年第7期16卷 10559-10566页

作者： Jianan Shen Benson Kunhung Tsai Ke Xu Anyu Shang James PBarnard Yizhi Zhang rahul tripathi Zhihong Chen Xinghang Zhang Haiyan Wang School of Materials Engineering Purdue UniversityWest LafayetteIndiana 47907USA Elmore Family School of Electrical and Computer Engineering Purdue UniversityWest LafayetteIndiana 47907USA Birck Nanotechnology Center Purdue UniversityWest LafayetteIndiana 47907USA

Multiferroics are an intriguing family of materials due to the simultaneous presence of two ferroic orderings,namely,ferroelectricity and *** are scientifically and technologically important and have numerous potential applications,such as four-state logic memories and multiferroic tunneling ***,the growth of epitaxial singlephase multiferroic thin films typically requires single crystalline oxide substrates,which hinders their future integration with Sibased *** this study,we report a generalized synthesis method that uses the polydimethylsiloxane(PDMS)-assisted wetetching method with an Sr_(3)Al_(2)O_(6)(SAO)sacrificial layer to transfer freestanding single-phase multiferroic Bi_(2)NiMnO_(6)(BNMO)films from conventional SrTiO_(3)(STO)substrates onto a Si *** structures and properties of the films have been characterized before and after the *** transferred films possess good multiferroic properties on Si wafers,indicating full compatibility with modern Si *** method can be generally applicable to other Bi-based multiferroic materials as ***,the original STO substrates after the transfer process have been recycled for preparing new batches of freestanding BNMO films,indicating a low-cost and sustainable method for manufacturing large-volume freestanding complex oxide thin films.

关键词： multiferroics freestanding films wet-transfer SAO sacrificial layer recyclable substrates sustainable

Effects of 42-year long-term fertilizer management on soil phosphorus availability, fractionation,adsorption–desorption isotherm and plant uptake in flooded tropical rice

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The Crop Journal 2015年第5期3卷 387-395页

作者： Pratap Bhattacharyya Amaresh Kumar Nayak Mohammad Shahid rahul tripathi Sangita Mohanty Anjani Kumar Rajagounder Raja Bipin Bihari Panda Banwari Lal Priyanka Gautam Chinmaya Kumar Swain Koushik Singha Roy Pradeep Kumar Dash Division of Crop Production Central Rice Research Institute

Soil phosphorus(P) fractionation, adsorption, and desorption isotherm, and rice yield and P uptake were investigated in flooded tropical rice(Oryza sativa L.) following 42-year fertilizer and manure application. The treatments included low-input [unfertilized control without N, P, or K(C0N0)], farmyard manure(FYM)(C1N0), NP(C0NP), NPK(C0NPK), FYM + NP(C1NP), and high-input treatment, FYM + NPK(C1NPK). Grain yield was increased significantly by 74%over the control under the combined application of FYM + NPK. However, under low- and high-input treatments, yield as well as P uptake was maintained at constant levels for 35 *** the same period, high yield levels and P uptake were maintained under the C0 NP, C0 NPK,and C1 NPK treatments. These are unique characteristics of a tropical flooded ecosystem, which is a self-sustaining system for rice production. The Fe–P fraction was highest compared to the Ca–P and Al–P fractions after 42 years of fertilizer application and was significantly higher under FYM + NPK treatment. The P adsorption capacity of soil was highest under the low-input treatment and lowest under long-term balanced fertilization(FYM + NPK). In contrast, P desorption capacity was highest under NPK and lowest in the control treatment. Long-term balanced fertilization in the form of FYM + NPK for 42 years lowered the bonding energy and adsorption capacity for P in soil but increased its desorption potential, increasing P availability to the plant and leading to higher P uptake and yield maintenance.

关键词： Long-term fertilization Phosphorus adsorption Phos

Carbon and water footprints of major crop production in India

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Pedosphere 2023年第3期33卷 448-462页

作者： Amaresh Kumar NAYAK rahul tripathi Manish DEBNATH Chinmaya Kumar SWAIN Biswaranjan DHAL Shanmugam VIJAYKUMAR Anshuman Debasis NAYAK Sangita MOHANTY Mohammad SHAHID Anjani KUMAR Manoj RAJAK Khitish Chandra MOHARANA Dibyendu CHATTERJEE Susmita MUNDA Pravat GURU Rubina KHANAM Banwari LAL Priyanka GAUTAM Suschismita PATTANAIK Arvind Kumar SHUKLA Nuala FITTON Pete SMITH Himanshu PATHAK Indian Council of Agriculture Research(ICAR)-National Rice Research Institute Cuttack 753006(India) ICAR-Central Sheep and Wool Research Institute Avikanagar 304501(India) ICAR-National Research Centre on Camel Bikaner 304001(India) ICAR-Indian Institute of Soil Science Bhopal 462038(India) Institute of Biological and Environmental Sciences University of Aberdeen23St Machar DriveAberdeen AB243UU(UK)

Scarcity of water and emission of greenhouse gases(GHGs)are the two key environmental issues affecting crop production in *** the carbon footprint(CF)and water footprint(WF)of crop production can help to mitigate the environmental hazards that stem from GHG emissions and water *** CFs and WFs of three major cereal crops,rice,wheat,and maize,were estimated for the year 2014 under the environmental conditions in India,based on national statistics and other data *** CFs(TCFs)of rice,wheat,and maize in India were estimated to be 2.44,1.27,and 0.80 t CO_(2)equivalent ha-1,respectively,and product WFs for rice,wheat,and maize in India were 3.52,1.59,and 2.06 m3 kg^(-1),*** WF was found to be the highest in West India for rice and in South India for both wheat and maize,with the highest irrigation water use in these *** was a positive correlation between TCF and total WF,and hence mitigation of both was possibly simultaneous in various regions in *** measures for mitigating GHG emissions and optimizing water use for rice,wheat,and maize production in India are recommended in this paper.

关键词： cereal crop crop planning green water footprint greenhouse gas emission water productivity water use

Effects of light availability on leaf attributes and seedling growth of four tree species in tropical dry forest

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Ecological Processes 2020年第1期9卷 17-32页

作者： Sachchidanand tripathi rahul Bhadouria Pratap Srivastava Rajkumari S.Devi Ravikant Chaturvedi A.S.Raghubanshi Ecosystems Analysis Laboratory Department of BotanyInstitute of ScienceBanaras Hindu UniversityVaranasi 221005India Department of Botany Deen Dayal Upadhyaya CollegeUniversity of DelhiNew Delhi 110078India Natural Resource Management Laboratory Department of BotanyUniversity of DelhiNew Delhi 110007India Shyama Prasad Mukherjee Post-graduate College University of AllahabadAllahabad 211013India Xishuangbanna Tropical Botanical Garden Chinese Academy of SciencesYunnan 666303China Institute of Environment and Sustainable Development(IESD) Banaras Hindu UniversityVaranasi 221005India

Background:In tropical dry forests,variation in understory light availability due to season and canopy tree density could be a governing factor in establishment and growth of tree *** with varying life history traits are expected to respond differentially to such *** investigated the response of seedlings of four tree species in a tropical day forest in relation to spatiotemporal variability of *** attempt to explore the role of leaf attributes in explaining intra-and inter-specific variations in relative growth *** study sites,each with three contrasting canopy conditions,were selected along a soil moisture *** of four tree species(viz.,Acacia catechu,Bridelia retusa,Lagerstroemia parviflora,and Shorea robusta),varying in life history traits,were monitored for seasonal variations in growth traits across canopy condition and sites for 2 ***:We observed a larger variation in leaf attributes for pioneer *** showed highest mean values for leaf dry matter content,leaf nitrogen concentration,leaf phosphorus concentration,net stomatal conductance,net photosynthetic rate,and relative growth rate in high light *** and *** demonstrated highest mean values for all the leaf attributes(except leaf dry matter content)in low light ***,intermediate values for leaf attributes were observed in *** which preferred moderate light ***:Seasonal variations in light availability at the forest floor appear to play an important role in the establishment and growth of tree seedlings in seasonal dry *** attributes can be used to explain intra-and inter-specific variation in response to light *** attributes in combinations can be used to predict relative growth rate of tree species in tropical dry environment,which apart from soil moisture is also determined by light availability due to seasonal changes and canopy tree density.

关键词： Tropical dry forest Tree seedlings Light intensity Leaf attributes Pioneer species Shade tolerance

Seropositivity of dengue cases at a tertiary care centre in Chhindwara,Madhya Pradesh:A three year trend

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Infectious Medicine 2023年第1期2卷 44-48页

作者： Purti C.tripathi Himanshu Singh rahul Kumar Suryawanshi Ritesh Upadhyay Department of Microbiology Chhindwara Institute of Medical SciencesChhindwaraMadhya Pradesh 480001India Department of Microbiology Dr.Harisingh Gour Vishwavidyalaya(A Central University)SagarMadhya Pradesh 470003India Department of Community Medicine Chhindwara Institute of Medical SciencesChhindwaraMadhya Pradesh 480001India

Background:During the recent decades,dengue virus infection has been emerged as a major public health *** is one of the important mosquito borne infections causing high mortality and morbidity of ***:This study was carried out from October 2018 to December 2020.A total of 354 serum samples of clinically suspected dengue patients were tested for immunoglobulin M(IgM)anti-dengue antibodies by dengue monoclonal antibody capture enzyme-linked immunosorbent assay(NIV DEN IgM Capture MAC ELISA).Seasonal variations,age and sex wise incidences were also ***:Total of 354 serum samples were processed from October 2018 to December *** year males were mostly infected with Dengue 08,10,and 03 in 2018,2019,and 2020,*** group 11-20 was found to be mostly infected by Dengue in case of both male and *** prevalence of Dengue in each year was from July to November might be due to the rainy *** characteristics of patients such as fever,headache,abdominal pain and nausea/vomiting,retro-orbital pain,epistaxis,petechiae,altered sensorium,positive tourniquet test were ***:Continuous dengue virus surveillance is required for monitoring of dengue virus so that early detec-tion can be carried *** vector control measures should be implemented for early detection of impending outbreak and to initiate timely control measures.

关键词： Dengue Seropositivity Aedes aegypti IgM ELISA

Detection and classification of multiple power signal patterns with Volterra series and interval type-2 fuzzy logic system

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Protection and Control of Modern Power Systems 2017年第1期2卷 92-101页

作者： rahul Rajiv Kapoor M.M.tripathi Department of Electronics&communication Engineering Delhi Technological UniversityDelhiIndia Department of Electrical Engineering Delhi Technological UniversityDelhiIndia.

The paper deals with the application of Volterra bound Interval type−2 fuzzy logic techniques in power quality *** work proposes a new layout for detection,localization and classification of various types of power quality *** proposed method exploits Volterra series for the extraction of relevant features,which are used to recognize different PQ events by Interval type-2 fuzzy logic based *** single as well as multiple powers signal disturbances have been simulated to testify the efficiency of the proposed *** time–frequency analysis results in the clear visual detection,localization,and classification of the different power quality *** simulation results signify that the proposed scheme has a higher recognition rate while classifying single and multiple power quality events unlike other ***,the proposed method is compared with SVM,feed forward neural network and type−1 Fuzzy logic system based classifier to show the efficacy of the proposed technique in classifying the Power quality events.

关键词： Non-stationary power signals Power quality(PQ) Volterra series Interval type-2 fuzzy logic system(IT2FLS) Power Spectral Entropy(PSE) Standard Deviation(SD)

Anti-cancer effects of sitagliptin,vildagliptin,and exendin-4 on triple-negative breast cancer cells via mitochondrial modulation

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BIOCELL 2022年第12期46卷 2645-2657页

作者： POOJA JAISWAL VERSHA tripathi ANSHUL ASSAIYA DHARMENDRA KASHYAP rahul DUBEY ANAMIKA SINGH JANESH KUMAR HEM CHANDRA JHA RAJESH SHARMA AMIT KUMAR DIXIT HAMENDRA SINGH PARMAR School of Biotechnology Devi Ahilya UniversityIndore452001India Laboratory of Membrane Protein Biology National Centre for Cell SciencePune411007India Department of Biosciences and Biomedical Engineering Indian Institute of TechnologyIndore452020India Department of Biotechnology IPS AcademyIndore452012India School of Pharmacy Devi Ahilya UniversityIndore452001India Central Council for Research in Ayurvedic Sciences Kolkata263645India

Triple-negative breast cancer(TNBC)cell line MDA-MB-231 is known for Warburg metabolism and defects in *** the other hand,dipeptidyl peptidase-IV(DPP-IV)inhibitors such as sitagliptin and vildagliptin and GLP-1 agonist exendin-4 are known to improve mitochondrial functions as well as biogenesis,but no study has evaluated the influence of these drugs on mitochondrial biogenesis on metastatic breast cancer cell *** have recently reported anticancer effects of 5-aminoimidazole-4-carboxamide riboside on MDA-MB-231 cells via activation of AMP-dependent kinase(AMPK),which activates the downstream transcription factors PGC-1α,PGC-1β,or FOXO1 for mitochondrial biogenesis;above-mentioned incretin-based therapies are also known to activate *** study evaluated the effects of sitagliptin,vildagliptin,and exendin-4 on MDA-MB-231 cells and the underlying changes in mitochondrial biogenesis,were *** with sitagliptin(100μM),vildagliptin(100μM),and exendin-4(10 nM)for 72 h to MDA-MB-231 cells led to a decrease in viability indicated by MTT assay,cell migration by scratch,and transwell migration assays,accompanied with marginal reduction in cell numbers along with the apoptotic appearance,the rate of apoptosis,and decreased lactate content in conditioned *** changes in the cancer phenotype were accompanied by an increase in the mitochondrial DNA to nuclear DNA ratio,increased MitoTracker green and red staining,and increased expression of transcription factors PGC-1α,NRF-1,NRF-2,TFAM,and ***-treatment of cells with these incretin-based drugs followed by 48 h treatment with 1μM doxorubicin increased doxorubicin sensitivity as observed by a decrease in viability by MTT ***,sitagliptin,vildagliptin,and exendin-4 exert their beneficial effects on TNBC cells via an increase in mitochondrial biogenesis that helps to switch Warburg metabolism into anti-Warburg *** response was in the order of:sitagliptin>vildagliptin>ex

关键词： Sitagliptin Vildagliptin Exendin-4 Apoptosis Migration Viability Chemo-sensitivity Mitochondrial biogenesis