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Identification of optimal composition with superior electrochemical properties along the zero Mn^(3+)line in na_(0.75)(Mn-Al-Ni)O_(2)pseudo ternary system

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Journal of Energy Chemistry 2024年第9期96卷 206-216页

作者： Hari narayanan Vasavan Manish Badole Samriddhi Saxena Velaga Srihari Asish kumar Das Pratiksha Gami Neha Dagar Sonia Deswal Pradeep kumar Himanshu kumar Poswal Sunil kumar Department of Metallurgical Engineering and Materials Science Indian Institute of Technology IndoreSimrol 453552India High Pressure&Synchrotron Radiation Physics Division Bhabha Atomic Research Centre400085 MumbaiIndia School of Physical Sciences Indian Institute of Technology MandiHimachal Pradesh 175005India Center for Electric Vehicle and Intelligent Transport Systems Indian Institute of Technology IndoreSimrol 453552India

Biphasic layered oxide cathodes,known for their superior electrochemical performance,are prime candidates for commercializing in na-ion ***,we unveil a series of P3/P2 monophasic and biphasic Al-substituted na_(3/4)Mn_(5-x/8)Al_(2x/8)Ni_(3-x/8)O_(2)layered oxide cathodes that lie along the‘zero Mn^(3+)line’in the na_(3/4)(Mn-Al-Ni)O_(2)pseudo-ternary *** structural analysis showed a larger na^(+)conduction bottleneck area in both P3 and P2 structures with a higher Al3+content,which enhanced their rate *** each composition,the P3/P2 biphasic compound with nearly equal fractions of P3 and P2 phases outperformed their monophasic counterparts in almost all electrochemical performance *** synchrotron XRD measurements obtained for the monophasic P3 and biphasic P2/P3 samples revealed the absence of the O3 phase during *** high structure stability and faster na^(+)transport kinetics in the biphasic samples underpins the enhancement of electrochemical properties in the Al-substituted P3/P2 *** results highlight fixed oxidation state lines as a novel tool to identify and design layered oxide cathodes for na-ion batteries in pseudo-ternary diagrams involving Jahn-Teller active cations.

关键词： Layered oxides Biphasic cathode Operando Synchrotron XRD Electrochemical behavior Cyclic performance

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Wharton’s jelly mesenchymal stem cells: Future regenerative medicine for clinical applications in mitigation of radiation injury

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World Journal of Stem Cells 2024年第7期16卷 742-759页

作者： Prashasti Sharma Dharmendra kumar Maurya Life Sciences Homi Bhabha National InstituteMumbai 400094MaharashtraIndia Radiation Biology&Health Sciences Division Bhabha Atomic Research CentreMumbai 400085MaharashtraIndia

Wharton’s jelly mesenchymal stem cells(WJ-MSCs)are gaining significant attention in regenerative medicine for their potential to treat degenerative diseases and mitigate radiation ***-MSCs are more naïve and have a better safety profile,making them suitable for both autologous and allogeneic *** review highlights the regenerative potential of WJ-MSCs and their clinical applications in mitigating various types of radiation *** this review,we will also describe why WJ-MSCs will become one of the most probable stem cells for future regenerative medicine along with a balanced view on their strengths and ***,the most updated literature related to both preclinical and clinical usage of WJ-MSCs for their potential application in the regeneration of tissues and organs will also be compiled.

关键词： Stem cells Wharton’s jelly mesenchymal stem cells Radiotherapy Xerostomia Lung fibrosis

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Unleashing the potential of morphotropic phase boundary based hybrid triboelectric–piezoelectric nanogenerator

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Journal of Materiomics 2024年第4期10卷 792-802页

作者： Sugato Hajra Aneeta Manjari Padhan Basanta kumar Panigrahi Phakkhananan Pakawanit Zvonko Jagličić naratip Vittayakorn Yogendra kumar Mishra Sanghoon Lee Hoe Joon Kim Department of Robotics and Mechatronics Engineering Daegu Gyeongbuk Institute of Science and TechnologyDaegu42988Republic of Korea Department of Electrical Engineering Siksha O Anusandhan UniversityBhubaneswar751030India Synchrotron Research and Applications Division Synchrotron Light Research InstituteNakhon Ratchasima30000Thailand Institute of Mathematics Physics and Mechanics&Faculty of Civil and Geodetic EngineeringUniversity of LjubljanaJadranska191000LjubljanaSlovenia Advanced Materials Research Unit Department of ChemistrySchool of ScienceKing Mongkut's Institute of Technology LadkrabangBangkok10520Thailand Mads Clausen Institute NanoSYDUniversity of Southern DenmarkAlsion 26400SønderborgDenmark Robotics and Mechatronics Research Center Daegu Gyeongbuk Institute of Science and Technology(DGIST)Daegu42988Republic of Korea

Morphotropic phase boundary(MPB)-based ceramics are excellent for energy harvesting due to their enhanced physical properties at phase boundaries,broad operating temperature range,and ability to customize properties for efficient conversion of mechanical energy into electrical *** this work,Bi_(1–x)na_(x)Fe_(1–x)Nb_(x)O_(3)(x=0.20,0.30,0.32 and 0.40,BNFNO abbreviation)based ceramics were synthesized using a solid-state route and blended with Polydimethylsiloxane(PDMS)to achieve flexible *** material characterization and energy harvesting were performed by designing a hybrid piezoelectric(PENG)-triboelectric(TENG)*** voltage and current of PENG,TENG,and hybrid bearing same device area(2 cm×2 cm)were recorded as 11 V/0.3μA;60 V/0.7μA;110 V/2.2μ*** strategies for enhancing the output performance of the hybrid device were evaluated,such as increased surface area(creating micro-roughness and porous morphology)and increasing electrode size and multi-layer hybrid device *** self-powered acceleration monitoring was demonstrated using the hybrid ***,the low-frequency-based wave energy is converted into electrical energy,confirming the usage of hybrid PENG-TENG devices as a base for battery-free sensors and blue energy harvesting.

关键词： Lead-free Acceleration Wave energy Morphotropic

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A hybrid system to predict brain stroke using a combined feature selection and classifier

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Intelligent Medicine 2024年第2期4卷 75-82页

作者： Priyanka Bathla Rajneesh kumar Department of Computer Science&Engineering Maharishi Markandeshwar UniversityMullanaAmbalaHaryanaIndia

Background Brain stroke is a serious health issue that requires timely and accurate prediction for effective treatment and *** study described a hybrid system that used the best feature selection method and classifier to predict brain *** The Stroke Prediction Dataset from Kaggle was used for this *** minority over-sampling technique(SMOTE)analysis was used to accomplish class ***,sensitivity,specificity,precision,and the F-Measure were the main performance parameters considered for *** determine the best combination for predicting brain stroke,the performance of five classifiers,naïve Bayes(NB),support vector machine(SVM),random forest(RF),adaptive boosting(Adaboost),and extreme gradient boosting(XGBoost),was compared along with three feature selection techniques,mutual information(MI),Pearson correlation(PC),and feature importance(FI).The performance parameters were assessed using k-fold *** The hybrid system proposed in this study identified a reduced set of features that were able to effectively predict brain *** provided a feature reduction ratio of 36.3%.The most successful hybrid system for predicting brain stroke used FI as the feature selection technique and RF as the classifier,achieving an accuracy of 97.17%.Conclusion The proposed system predicted brain stroke with high *** findings could be used to inform the early detection and prevention of brain stroke,allowing healthcare professionals to provide timely and targeted care to at-risk patients.

关键词： Machine learning naive Bayes Extreme gradient boosting Support vector machine Adaptive boosting Random forest

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Transcranial direct current stimulation as early augmentation in adolescent obsessive compulsive disorder:A pilot proof-of-concept randomized control trial

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World Journal of Clinical Pediatrics 2024年第2期13卷 161-170页

作者： Aditya Agrawal Vivek Agarwal Sujita kumar Kar Amit Arya Department of Psychiatry King George Medical UniversityUttar PradeshLucknow 226003India

BACKGROUND Transcranial direct current stimulation(tDCS)is proven to be safe in treating various neurological conditions in children and *** is also an effective method in the treatment of OCD in *** To assess the safety and efficacy of tDCS as an add-on therapy in drug-naive adolescents with *** We studied drug-naïve adolescents with OCD,using a Children’s Yale-Brown obsessive-compulsive scale(CY-BOCS)scale to assess their *** active and sham groups were given fluoxetine,and we applied cathode and anode over the supplementary motor area and deltoid for 20 min in 10 *** occurred at 2,6,and 12 wk using *** Eighteen adolescents completed the study(10-active,8-sham group).CY-BOCS scores from baseline to 12 wk reduced significantly in both groups but change at baseline to 2 wk was significant in the active group *** mean change at 2 wk was more in the active group(11.8±7.77 vs 5.25±2.22,P=0.056).Adverse effects between the groups were *** tDCS is safe and well tolerated for the treatment of OCD in ***,there is a need for further studies with a larger sample population to confirm the effectiveness of tDCS as early augmentation in OCD in this population.

关键词： Adolescents Early augmentation Obsessive compulsive disorder Safety Transcranial direct current stimulation

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An overview on metal-related catalysts: metal oxides, nanoporous metals and supported metal nanoparticles on metal organic frameworks and zeolites

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Rare Metals 2020年第7期39卷 751-766页

作者： Bhupendra kumar Singh Sunwoo Lee Kyungsu na Department of Chemistry Chonnam National UniversityGwangju 61186Republic of Korea

Metal nanoparticles(NPs) supported on porous materials have shown great advantages in many catalytic application fields. Supported metal NPs are receiving extensive attention due to their significant contribution in a wide range of current and future applications, and this is arguably one of the fastest growing research fields. In this review, we highlight various types of metal catalysts that possess great potential in several catalytic reactions. The major focus has been on metal oxides, nanoporous metals and metal NPs supported on metal-organic frameworks(MOFs) and zeolites. Special attention has been given to the synthesis strategies and application of the NPs supported on MOFs and zeolites, which are considered highly interesting and rapidly expanding areas in heterogeneous catalysis. Finally, the prospects of these catalysts have been included in the concluding remarks.

关键词： Supported metal catalysts Porous materials nanoporous metals Heterogeneous catalysis Zeolites Metal oxides Metal-organic frameworks

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Mo^(6+)Modified(K_(0.5)na_(0.5))NbO_3 Lead Free Ceramics:Structural,Electrical and Optical Properties

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Journal of Materials Science & Technology 2014年第5期30卷 459-465页

作者： Jyoti Rani Piyush kumar Patel Nidhi Adhlakha Hemant Singh K.L.yadav Satya Prakash Smart Materials Research Laboratory Department of PhysicsIndian Institute of Technology Roorkee Metallurgical and Materials Engineering Department Indian Institute of Technology Roorkee

Lead free polycrystalline ceramics （K0.5na0.5）Nb（1-x）MoxO3 （x = 0, 0.02, 0.04, 0.06 and 0.08） have been synthesized via solid state reaction method. The formation of single phase perovskite structure up to 6 mol% of Mo^6＋ has been confirmed by X-ray diffraction pattern. Impedance spectroscopy reveals that bulk resistance decreases with increasing temperature, which indicates negative temperature coefficient of resistance （NTCR） behaviour of the compounds. The diffuse reflectance spectroscopy results indicate a red shift of the band gap energy of K0.5na0.5NbO3 （KNN, from 4.28 to 3.61 eV） with increasing Mo^6＋ concentration due to structural modification. The photoluminescence spectra of doped samples are composed of two emission bands at room temperature. One emission band is near band edge ultraviolet （UV） emission （354 nm） and other is visible emission band （-397 nm） which may explore the possibility of these ceramics to be used in optical device applications.

关键词： Ceramics Characterization Dielectric constant Impedance spectroscopy Optical band gap

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Evaluation of anti-inflammatory potential of leaf extracts of Skimmia anquetilia

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Asian Pacific Journal of Tropical Biomedicine 2012年第8期2卷 627-630页

作者： Vijender kumar Zulfiqar Ali Bhat Dinesh kumar na Khan IA Chashoo Department of Pharmaceutical Sciences University of Kashmir

Objective:To evaluate anti-inflammatory potential of leaf extract of Skimmia anquetilia by invitro and in-vivo anti-inflammatory ***:Acute toxicity study was carried out to determine the toxicity level of different extract using acute toxic class method as described in Organization of Economic Co-operation and Development Guidelines ***(1% w/w) was administered and inflammation was induced in rat *** leaf extracts of Skimmia anquetilia were evaluated for anti-inflammatory activity by in-vitro human red blood cell(HRBC) membrane stabilization method and in-vivo carrangeenan-induced rat paw edema method. Results:The in-vitro membrane stabilizing test showed petroleum ether(PE),chloroform(CE), ethyl acetate(EE),methanol(ME) and aqueous extracts(AE) showed 49.44%,59.39%,60.15%,68.40% and 52.18%protection,respectively as compared to control *** in-vivo results of CE,EE and ME showed 58.20%.60.17%and 67.53%inhibition of inflammation after 6h administration of test drugs in albino *** potency of the leaf extracts of Skimmia anquetilia were compared with standard diclofenac(10 mg/kg) which showed 74.18%protection in in-vitro HRBC membrane stabilization test and 71.64%inhibition in in-vivo carrangeenan-induced rat paw edema model. The ME showed a dose dependent significant(Pnan induced rat paw ***:The present investigation has confirmed the anti-inflammatory activity of Skimmia anquetilia due to presence of bioactive phytoconstitutes for the first lime and provide the pharmacological evidence in favor of traditional claim of Skimmia anquetilia as an antiinflammatory agent.

关键词： Skimmia anquetilia Anti-inflammatory Carrageenan Diclofenac Leaf extract Phytochemical analysis

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Cynodon dactylon extract ameliorates cognitive functions and cerebellar oxidative stress in whole body irradiated mice

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Asian Pacific Journal of Tropical Biomedicine 2019年第7期9卷 278-283页

作者： Roopesh Poojary nayanatara Arun kumar Reshma kumarchandra Vinodini na Bhagyalakshmi K Ganesh Sanjeev Department of Physiology Kasturba Medical CollegeMangaloreManipal Academy of Higher EducationManipalKarnatakaIndia Department of Biochemistry Kasturba Medical CollegeMangaloreManipal Academy of Higher EducationManipalKarnatakaIndia Microtron Centre Department of Studies in PhysicsMangalore UniversityMangalagangotriKarnatakaIndia

Objective: To explore the effect of hydroalcoholic extract of Cynodon dactylon on the whole body radiation-induced oxidative status of the cerebellum and cognitive impairments in mice. Methods: Swiss albino mice were randomly divided into the control group, radiation control group, low dose and high dose Cynodon dactylon extract treated groups and pre-treated with Cynodon dactylon extract before irradiation. Cynodon dactylon extract was administered for 7 d daily in low dose(0.25 g/kg) and high dose(1 g/kg). On day 7, mice were irradiated with a sublethal dose of 5 Gy gamma rays. Motor coordination was assessed by elevated rotarod test and spatial memory was studied by water maze test. Subsequently, biochemical markers(glutathione, lipid peroxidation and nitric oxide levels) in the cerebellum were evaluated. Results: The gamma irradiated group showed significant impairment in motor coordination and spatial memory compared to normal mice. Mice treated by Cynodon dactylon extract prior to gamma radiation showed good improvement in both paradigms compared to the radiation control group. Moreover, glutathione level was increased, while lipid peroxidation and nitric oxide levels were significantly reduced in mice receiving low dose and high dose of Cynodon dactylon extract compared to the radiation control group. Conclusions: The present study suggests the neuroprotective role of Cynodon dactylon against radiation-induced cognitive impairment and oxidative stress on the cerebellum of mice.

关键词： Cerebellum Radiation Cognition Cynodon dactylon Memory

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Battery energy storage-based system damping controller for alleviating sub-synchronous oscillations in a DFIG-based wind power plant

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Protection and Control of Modern Power Systems 2023年第2期8卷 260-277页

作者： Neevatika Verma narendra kumar Rajeev kumar Department of Electrical Engineering Delhi Technological UniversityNew DelhiIndia Electrical Engineering Department Jamia Millia IslamiaNew DelhiIndia Electrical and Electronics Engineering Department KIET Group of InstitutionsGhaziabadIndia

This paper presents the issue of the Sub-synchronous resonance(SSR)phenomenon in a series compensated DFIG-based wind power plant and its alleviation using a Battery Energy Storage-based Damping Controller(BESSDCL).A supplementary damping signal is developed considering the angular speed deviation and is incorporated into the BESS control ***-area Measurement System data is used to determine the angular speed deviation.A lin-earized system model is developed to perform eigenvalue analysis,and to detect and examine unstable SSR *** variation of wind speed and three-phase fault are also taken into consideration to validate the robustness of the *** further verify the efficacy of the proposed damping controller,time-domain simulations are performed using MATLAB/*** application of the proposed BESSDCL stabilizes all the unstable system modes effectively at wind speeds of 7 m/s,9 m/s,and 11 m/s,and at 40%,50%,and 60%series compensation levels,as well three-phase fault conditions.

关键词： Battery energy storage system Damping controller Doubly-fed induction generator(DFIG) Series

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