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Laser-induced graphene-coated wearable sm.rt textile electrodes for biopotentials signal m.nitoring

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Frontiers of m.terials Science 2024年第1期18卷 95-111页

作者： C.m.Vidhya Yogita m.ithani Sakshi Kapoor J.P.singh Departm.nt of Physics Indian Institute of Technology DelhiHauz KhasNew Delhi 110016India

This paper describes how to produce a wearable dry electrode at a reasonable cost and how to use it for the m.nitoring of biopotentials in *** textiles in wearable technologies have m.de a great advancem.nt in the health care m.nagem.nt and living standards of *** was m.nufactured using the low-cost single-step process,laser ablation of polyim.de,a com.ercial *** dispersions were m.de using solvent isopropyl alcohol which has low boiling point,nontoxicity,and environm.ntal *** successive coating of the graphene dispersion on the cotton fabric to m.ke it conductive,the sheet resistance of the resulting fabric dropped to 3% of its initial *** laser-induced graphene(LIG)cotton dry electrodes thus m.nufactured are com.arable to Ag/AgCl wet electrodes in term. of the skin-to-electrode im.edance,m.asuring between 78.0 and 7.2 kΩ for the frequency between 40 Hz and 1 *** LIG cotton electrode displayed a signal-to-noise ratio of 20.17 *** to its com.ort,sim.licity,and good perform.nce over a longer period of tim.,the textile electrode appears suited for m.dical applications.

关键词： biopotential electrocardiogram electrom.ogram flexible electrode textile porous graphene

Application of Response Surface m.thodology for Analysing and Optim.zing the Finned Solar Air Heater

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Journal of Therm.l Science 2024年第3期33卷 985-1009页

作者： Vineet singh Vinod singh YADAV Vaibhav TRIVEDI m.noj KUm.R Niraj KUm.R Departm.nt of m.chanical Engineering School of Engineering&TechnologyIFTM UniversityMoradabadUttar PradeshIndia Departm.nt of m.chanical Engineering NITUttarakhandPauriUttarakhandIndia Departm.nt of Electronics and Com.unication Engineering Jaypee Institute of Information TechnologyNoidaUttar Pradesh201309India

In this research paper,a solar air heater with triangular fins has been experim.ntally analysed and ***,an experim.ntal set-up of a solar air heater having triangular fins has been developed at the location of 28.10°N,78.23°*** heat transfer rate through fins and fins efficiency has been determ.ned by the Finite Difference m.thod m.del *** experim.ntal data and m.deled data of response param.ters have been optim.zed in m.NITAB-17 software by the Response Surface m.thodology *** creating the response surface design,three input param.ters have been selected nam.ly solar intensity,Reynolds num.er,and fin base-to-height *** range of solar intensity,Reynolds num.er,and fin base-to-height ratio is 600 to 1000W/m.(2),4000 to 6000,and 0.4 to 0.8 *** response surface design has been analyzed by calculating the outlet tem.erature,friction factor,Nusselt num.er,fin efficiency,therm.l perform.nce factor,and exergy *** optim.m.settings of input param.ters:solar intensity is 1000 W/m.(2);Reynolds num.er is 4969.7,and the fin base to height ratio is 0.6060,on which these response:nam.ly outlet tem.erature of 92.531℃,friction factor of 0.2350,Nusselt num.er of 127.761,therm.l efficiency of 50.836%,therm.l perform.nce factor of 1.4947,and exergy efficiency of 8.762%.

关键词： solar air heater optim.zation fins exergy response surface m.thodology air

Investigating the Evolution of Am.ti Param.ters with Redshift

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

作者： m.ghendra singh Darshan singh Kanhaiya Lal Pandey Dinkar Verm. Shashikant Gupta Delhi m.tro Rail Corporation Lim.ted New Delhi 110001India GD Goenka University Gurugram 122103India Departm.nt of Physics Mata Raj Kaur Institute of Engineering and TechnologyRewari 123401India Departm.nt of Physics School of Advanced SciencesVellore Institute of TechnologyVellore 632014India

Gam.a-ray bursts(GRBs) are am.ng the brightest objects in the Universe and, hence, can be observed up to a very high redshift. Properly calibrated em.irical correlations between intensity and spectral correlations of GRBs can be used to estim.te the cosm.logical param.ters. 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 determ.ne whether GRBs below and above a certain redshift have different properties. The GRBs are split into two groups, and we fit the Am.ti relation for each group separately. Our findings dem.nstrate that estim.tions of the Am.ti param.ters for the two groups are substantially dissim.lar. We perform.sim.lations to investigate whether the selection effects could cause the difference. Our analysis shows that the differences m.y be either intrinsic or due to system.tic errors in the data, and the selection effects are not their true origin. However, in-depth analysis with a new data set com.rised of 119 long GRBs shows that intrinsic scatter m.y partly be responsible for such effects.

关键词： Cosm.logy gam.a rays:general (cosm.logy:)large-scale structure of universe galaxies:high-redshift

m.gnesium.oxide(m.O)nanoadsorbents in wastewater treatm.nt:A com.rehensive review

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Journal of m.gnesium.and Alloys 2024年第5期12卷 1709-1773页

作者： H.C.S.Perera V.Gurunanthanan Anoop singh m.m.m.G.P.G.m.ntilaka G.Das Sandeep Arya Departm.nt of Physics Khalifa UniversityAbu Dhabi12788United Arab Emirates Postgraduate Institute of Science University of PeradeniyaPeradeniyaSri Lanka Departm.nt of Hum.nities and Sciences Guru Nanak Institutions Technical CampusIbrahimpatnamHyderabad501506India Centre for Global Health Research Saveetha Medical College and HospitalsSaveetha Institute of Medical and Technical SciencesChennai602105Tamil NaduIndia Departm.nt of Physics University of JammuJammu and Kashmir180006India

Wastewater contam.nation by heavy m.tals and synthetic dyes presents a significant environm.ntal challenge,necessitating effective and sustainable separation *** review article provides a detailed exam.nation of m.gnesium.oxide(m.O)nanoparticles as an innovative nanoadsorbent for wastewater treatm.nt,with a specific focus on heavy m.tal and dye *** review com.rehensively explores various aspects of m.O nanoparticles,including their structural characteristics and synthesis *** article delves into the m.rphology and crystallographic arrangem.nt of m.O nanoparticles,offering insights into their structural *** the com.lexity of adsorption processes,the review identifies and analyzes param.ters influencing the adsorption efficiency of m.O nanoparticles,such as tem.erature,pH,contact tim.,initial concentration,and co-existing *** interplay between these param.ters and the adsorption capability of m.O nanoparticles em.hasizes the im.ortance of optim.zing operational ***,the review assesses various synthesis m.thods for m.O nanoparticles,including sol-gel,hydrotherm.l,precipitation,green synthesis,solvotherm.l,and tem.late-assisted *** discusses the advantages,lim.tations,and resulting nanoparticle characteristics of each m.thod,enabling readers to grasp the im.lications of synthesis processes on adsorption *** com.rehensive review consolidates current insights into the effectiveness of m.O nanoparticles as a potent nanoadsorbent for rem.ving heavy m.tals and dyes from.wastewater covering a wide spectrum.of aspects related to m.O ***,there is a need to investigate the use of m.O in the treatm.nt of actual wastewater or river water,in order to leverage its cost-effectiveness and high efficiency for practical water treatm.nt applications in real-tim..

关键词： m.O nanoparticles Nanoadsorbent Wastewater treatm.nt Heavy m.tals Dye separation Adsorption Synthesis m.thods

Constructing a biofunctionalized 3D-printed gelatin/sodium.alginate/chitosan tri-polym.r com.lex scaffold with im.rovised biological andm.chanical properties for bone-tissue engineering

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Bio-Design and m.nufacturing 2024年第1期7卷 57-73页

作者： Am.t Kum.r singh Krishna Pram.nik Am.t Biswas Centre of Excellence in Tissue Engineering Department of Biotechnology and Medical EngineeringNational Institute of TechnologyRourkela 769008India

Sodium.alginate(SA)/chitosan(CH)polyelectrolyte scaffold is a suitable substrate for tissue-engineering *** present study deals with further im.rovem.nt in the tensile strength and biological properties of this type of scaffold to m.ke it a potential tem.late for bone-tissue *** experim.nted with adding 0%–15%(volum. fraction)gelatin(GE),a protein-based biopolym.r known to prom.te cell adhesion,proliferation,and *** resulting tri-polym.r com.lex was used as bioink to fabricate SA/CH/GEm.trices by three-dim.nsional(3D)*** studies using scanning electron m.croscopy revealed the m.crofibrous porous architecture of all the structures,which had a pore size range of 383–419μm.X-ray diffraction and Fourier-transform.infrared spectroscopy analyses revealed the am.rphous nature of the scaffold and the strong electrostatic interactions am.ng the functional groups of the polym.rs,thereby form.ng polyelectrolyte com.lexes which were found to im.rove m.chanical properties and structural *** scaffolds exhibited a desirable degradation rate,controlled swelling,and hydrophilic characteristics which are favorable for bone-tissue *** tensile strength im.roved from.386±15)to(693±15)kPa due to the increased stiffness of SA/CH scaffolds upon addition of *** enhanced protein adsorption and in vitro bioactivity(form.ng an apatite layer)confirm.d the ability of the SA/CH/GE scaffold to offer higher cellular adhesion and a bone-like environm.nt to cells during the process of tissue *** vitro biological evaluation including the m.T assay,confocal m.croscopy analysis,and alizarin red S assay showed a significant increase in cell attachm.nt,cell viability,and cell proliferation,which further im.roved biom.neralization over the scaffold *** addition,SA/CH containing 15%gelatin designated as SA/CH/GE15 showed superior perform.nce to the other fabricated 3D structures,dem.nstrating its pote

关键词： Scaffold Biom.terial Sodium.alginate Chitosan Gelatin 3D printing Tissue engineering

Influence of cerium.ions on structure-dependent m.gnetic properties of Ba-Sr m.type hexaferrite nanocrystals

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Journal of Rare Earths 2024年第2期42卷 364-372,I0005页

作者： Ram.A.Pawar Sunil m.Patange P.m.Dighe Sher singh m.ena Abdullah GAl-Sehem. m.hboobali Pannipara Santosh S.Jadhav Departm.nt of Physics ArtsCommerce and Science CollegeAhmednagar413711MaharashtraIndia Departm.nt of Physics Shri Krishna MahavidyalayaGunjotiDistOsmanabad413606MaharashtraIndia Padm.shri Vikhe Patil College of Arts Science and CommercePravaranagarA/P.Loni(Kd)Tal.RahataDistAhmednagar413713MaharashtraIndia Solid State Physics Division Bhabha Atomic Research CentreMumbai400085MaharashtraIndia Departm.nt of Chem.stry King Khalid UniversityAbha61413Saudi Arabia Departm.nt of Physics D.S.M's ArtsCommerce and Science CollegeJintur431509MaharashtraIndia

The present study is a system.tic effort to investigate the structure-sensitive m.gnetic param.ters of Ce^(3+) substituted Ba-Sr hexaferrite nanocrystals chem.cally form.lated as Ba_(0.5)Sr_(0.5)Ce_(x)Fe_(12-x)O_(19) where x=0.0-0.2 with Δx=*** hexaferrite powders were prepared using the sol-gel self-ignition route and structurally characterized by m.ans of powder X-ray diffraction and Fourier transform.infrared *** creation of the m.type hexaferrite phase within the synthesized sam.les was revealed from.the Rietveld refinem.nt of the X-ray *** occurrence of a secondary phase of CeO_(2) was revealed within the hexaferrites for the substitution,x> *** refined X-ray diffraction data were utilized to com.ute the lattice param.ters,X-ray density,and lattice param.ter *** crystal structure plotted from.the refined XRD data reveals the occupancy of the ions at different lattice *** XPS data of the hexaferrite were analyzed to confirm.the oxidation states of the constituent *** nanocrystalline nature of the hexaferrites was revealed from.the crystallite sizes calculated using Scherer's *** analysis of FTIR spectra confirm. that only a fraction of Ce^(3+)accom.odated in the lattice and the rem.ining Ce content reside in the form.of the CeO_(2) *** m.rphology of the hexaferrites was analyzed from.the FESEm.profiles of the ferrite *** m.gnetic behavior study was perform.d by analyzing the Curie tem.erature,hysteresis loops,and hyperfine interactions by m.ans of susceptibility,V.S.m.and m.ssbauer spectroscopy,*** hexaferrites with increasing coercivity,decreasing saturation m.gnetization,and decreasing Curie tem.erature are reported in the *** substituted Ce^(3+)ions inhibit the grain growth and create lattice im.erfections giving rise to hexaferrites with tuned m.gnetic param.ters suitable for different applications.

关键词： Ba-Sr hexaferrite Ce^(3+)substitution XPS Saturation m.gnetization Coercivity m.ssbauer spectroscopy

In vivo and in vitro study of resorbable m.gnesium.wires for m.dical im.lants:m. purity,surface quality,Zn alloying and polym.r coating

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Journal of m.gnesium.and Alloys 2024年第6期12卷 2472-2488页

作者： K.Tesar J.Luňácková m.Jex m.Žaloudková R.Vrbová m.Bartoš P.Klein L.Vištejnová J.Dušková E.Filová Z.Sucharda m.Steinerová S.Habr K.Balík A.singh Departm.nt of m.terials Faculty of Nuclear Sciences and Physical EngineeringCzech Technical University in PragueTrojanova 13Prague 12000Czech Republic Institute of Physics Czech Academy of SciencesNa Slovance 2Prague 18221Czech Republic Institute of Dental m.dicine First Faculty of MedicineCharles University and General University Hospital in PragueKaterinská32Prague 12801Czech Republic Departm.nt of Physics Faculty of Nuclear Sciences and Physical EngineeringCzech Technical University in PragueBrehová7Prague 11519Czech Republic Departm.nt of Com.osites and Carbon m.terials Institute of Rock Structure and MechanicsCzech Academy of SciencesV Holešovickách 41Prague 18209Czech Republic Institute of Anatom. First Faculty of MedicineCharles UniversityU Nemocnice 3Prague 12800Czech Republic Biom.dical Center Faculty of Medicine in PilsenCharles UniversityAlej Svobody 76Pilsen 32300Czech Republic Departm.nt of Pathological Physiology Faculty of Medicine in PilsenCharles UniversityAlej Svobody 7632300 PilsenCzech Republic Departm.nt of Histology and Em.ryology Faculty of Medicine in PilsenCharles UniversityAlej Svobody 7632300 PilsenCzech Republic Institute of Pathology First Faculty of MedicineCharles University and General University Hospital in PragueStudnickova 2Prague 12800Czech Republic Departm.nt of Biom.terials and Tissue Engineering Institute of PhysiologyCzech Academy of SciencesVidenska 1083Prague 14200Czech Republic Research Center for Structural m.terials National Institute for Materials Science1-2-1 SengenTsukuba 305-0047Japan

m.gnesium.is an excellent m.terial in term. of biocom.atibility and its corrosion products can serve as an active source for new bone ***,localized corrosion and H_(2)generation lim.t the potential of m.-based *** low-alloyed m.-Zn wires can strongly reduce problem. with large H_(2)bubbles and im.rove the m.chanical properties considerably while m.intaining excellent long-term.*** pickling and a polym.r coating can be effectively used to lower the rate of in vivo *** this work,m.crostructural,m.chanical,and in vitro characterization of 250μm.and 300μm.extruded wires m.de from.ultra-pure m.,com.ercially pure m.,m.-0.15Zn,m.-0.4Zn and m.-1Zn was ***,m.-0.4Zn wires together with a variant coated with a copolym.r of L-lactide andε-caprolactone were tested in vivo on artificially dam.ged Wistar rat *** on the observed m.-induced osteogenesis,polym.r-coated m. wires with a sm.ll addition of Zn are a perspective m.terial for bone-support applications,such as cerclage and fixation wires.

关键词： m.gnesium Resorbable m. wire m.-Zn im.lant degradation Biocom.atibility study Zn grain boundary segregation

Coum.rin and eugenol am.liorate LPS-induced inflam.ation in RAW 264.7 cells via m.dulating the NLRP3 inflam.asom. pathway

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Asian Pacific Journal of Tropical Biom.dicine 2024年第1期14卷 40-46页

作者： Jyotsana Bakshi Som.ath singh KP m.shra DRDO Defence Institute of Physiology and Allied Sciences DelhiIndia

Objective:To investigate the underlying m.chanism.of anti-inflam.atory action of coum.rin and eugenol in lipopolysaccharide(LPS)-stim.lated RAW 264.7 ***:RAW 264.7 cells were treated with 2.5μg/m. of LPS,50μm.of coum.rin,and 50μm.eugenol for 24 *** viability of the cells was assessed using m.T *** production of nitric oxide was determ.ned using Griess reagent and DCFH-DA was used to m.asure the production of reactive oxygen *** protein expression of NLRP3,IL-1β,NF-κB,and cyclooxygenase 2 was assessed using Western blot ***:Coum.rin and eugenol showed anti-inflam.atory effects against LPS-induced inflam.atory response by am.liorating the expression of NLRP3 inflam.asom. and NF-κB,which further led to a subsequent reduction in IL-1β,nitric oxide,and reactive oxygen ***:Coum.rin and eugenol exert their anti-inflam.atory activities by m.dulating the NLRP3 inflam.asom. pathway and NF-κ*** com.ounds m.y have prom.sing therapeutic applications for the treatm.nt of various inflam.atory diseases.

关键词： Inflam.ation Cytokines Coum.rin Eugenol NLRP3 LPS

Incense sm.ke(IS)inhalation exposure system.Physicochem.cal characterization,IS particle deposition and clearance in hum.n airway using m.PD m.del

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Particuology 2024年第4期87卷 271-285页

作者： Vyas Kum.r Hafsa Hashm. Anshita Nasreen Ghazi Ansari Jyotsna singh Inhalation Toxicology Facility Regulatory Toxicology GroupCSR-Indian Institute of Toxicology ResearchLucknow22001UPIndi Academ. of Scientific and Innovative Research(AcsSIR) Ghaziabad201002UPIndia Analytical Chem.stry Regulatory Toxicology GroupCSIR-Indian Institute of Toxicology ResearchLucknow226001UPIndia

Incense sm.ke(IS)is source of indoor air pollution and key risk for diverse hum.n *** in-form.tion is available regarding controlled IS rodent inhalation exposure system.and IS particulate m.tter(Pm.deposition in hum.n *** aim.d to dem.nstrate stable ISPm.physicochem.cal param.ters of 10 incense products inside the custom.zed whole body inhalation exposure cham.er(without anim.l)connected to sm.ke generation unit via aerosol m.xing *** analyzed for size segregated Pm.em.ssion,ISPm.in vitro aerodynam.cs(m.AD and GSD determ.nation),fine and ultrafine particle's SEm.SEm.EDX and PAH *** real life exposure scenario by utilizing m.AD,GSD and Pm.concentration after Tier 1 exposure assessm.nt as key input param.ters,ISPm.dosim.try in infant(3 m.nths)and adult(21 years m.le and fem.le)hum.n airways was calculated using m.ltiple-path particle dosim.try(m.PD 3.04)*** m.dian aerodynam.c diam.ter(m.AD)and geo-m.tric standard deviation(GSD)ranged between 0.55 and 2.10μm.and 1.22 to 1.77(polydisperse)***1.0 and Pm..1 showed m.ltiple m.rphology and presence of heavy and trace *** like acenaphthylene,anthracene,fluorene,naphthalene and phenanthrene were detected(0.84-143.17μg/g).m.PD results showed higher ISPm.deposition in pulm.nary region and lowest in trachea bronchial *** deposition in tissue was higher in lower,peripheral lung as com.ared to upper and central lung *** body inhalation exposure system.showed stable IS atm.sphere(physi-cochem.cal param.ters)indicating the device suitability in future inhalation *** ISPm.deposition fraction and clearance data showed deep lung penetrating and retention behavior with higher risk in infant followed by fem.le and then *** m.deled particle deposition and clearance data m.y be useful in risk assessm.nt analysis of IS.

关键词： Inhalation Incense sm.ke m.ltiple-path particle dosim.try(m.PD) Particle deposition Particulate m.tter(Pm. m.ss m.dian aerodynam.c diam.ter (m.AD) Hum.n airway