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Enhancement of coercivity,permea.i.ity,and dielectric properties of Co_(0.2)Zn_(0.3)ni_(0.5)Eu_(x)Fe_(2-x)O_(4) ferrites for memory and high frequency devices

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Journal of Rare Earths 2024年第6期42卷 1128-1135,I0005页

作者： i.sardar m.D.Hossain m.s.sikder m.n.i.Khan m.R.Rahman Physics Discipline Khulna UniversityKhulna9208Bangladesh Department of Physics Khulna University of Engineering&TechnologyKhulna9203Bangladesh Department ofComputer science and Engineering Northern University of Business&Technology KhulnaKhulna9100Bangladesh material science Division Atomic Energy CentreDhaka1000Bangladesh

spinel cubic ferrites have huge applica.i.ns in me mory and high frequency *** the improvement of these modern devices,the magnetic coercivity,permea.i.ity,and dielectric properties of a ferrite are the important *** article focuses on improving the magnetic coercivity,magnetic permea.i.ity,and dielectric properties of Co_(0.2)Zn_(0.3)ni_(0.5)Eu_(x)Fe_(2-x)O_(4) ferrites,where x=0.00,0.06,and *** X-ray diffraction(XRD),Fourier transform infrared spectroscopy(FTiR),field emission scanning electron microscopy(FEsEm),energy dispersive X-ray(EDX),vibra.i.g sample magnetometer(Vsm),and an impedance analyzer were used to characterize the structural,magnetic,and dielectric properties of the *** XRD patterns indicate the forma.i.n of spinel cubic structure of the samples with a secondary peak(EuFeO_(3))for Eu doped *** densities and porosities of the samples follow an inverse trend,where the doped samples’lattice parameters are increased with the increment of rare earth Eu *** FTiR analysis also proves the spinel cubic phase of the *** average grain size of the ferrites is obtained via FEsEm images,and it is increased from 121 to 198 *** analysis confirms that doping of the Eu content also changes other hysteresis loop properties of Co_(0.2)Zn_(0.3)ni_(0.5)Eu_(x)Fe_(2-x)O_(4) ***,the coercivity of the Eu doped samples is greater than that of the mother alloy(x=0.00).The EDX study shows that there is no impurity conta.i.a.i.n in the *** permea.i.ity and dielectric measurements show an improved qua.i.y factor of the Eu-doped samples with low magnetic and dielectric *** dependent resistivity and impedance analysis also show the improved *** the observed properties of the samples,all the investigated ferrites might be strong candidates for potential applica.i.ns in memory devices,magnetic sensors,and high frequency applica.i.ns.

关键词： Ferrites Raree arths Coercivity Permea.i.ity EDX Resistivity

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Direct microwave leaching conditions of rare earth elements in fluorescent wastes

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Journal of Rare Earths 2024年第6期42卷 1165-1174,I0007页

作者： A.Bilen B.Birol m.n.sa.i.ede s.s.Kaplan m.s.sonmez Department of metallurgical and materials Engineering Yildiz Technical UniversityIstanbulTurkey Department of Chemical Engineering and materials science Stevens Institute of TechnologyNew JereyUSA Department of metallurgical and materials Engineering Istanbul Technical UniversityIstanbulTurkey

The luminescent phosphor powder in the fluorescent lamp constitutes 2%of the lamp’s *** can be mentioned that fluorescent wastes are a crucial raw material to produce rare earth *** the present study,microwave leaching process was conducted to dissolve rare earth elements yttrium(Y),europium(Eu),and remaining rare earth elements(REEs)present in the phosphor powder of the fluorescent *** the yields were *** the microwave leaching process,the effects of the temperature(80-160℃),a.i. type(hydrochloric a.i.(HCl),nitric a.i.(HnO_(3)),sulphuric a.i.(H_(2)sO_(4))),a.i. concentra.i.n(0.5-6 mol/L),solid to liquid ra.i.(0.1:10-0.5:10)and reaction time(5-90 min)parameters on leaching efficiencies of varying rare earth elements and calcium were *** highest yield was obtained in the direct microwave leaching of fluorescent waste with the experimental conditions of 6 mol/L HCl,160℃,0.1:10 solid-to-liquid ra.i.(s:L),and 90 *** energy calcula.i.ns were made,and kinetic models of the reactions were obtained,and it is observed that Y and Eu dissolution is diffusion-controlled,on the other hand,lanthanum(La),cerium(Ce),and terbium(Tb)were exa.i.ed to be chemical reaction ***,calcium(Ca)and gadolinium(Gd)seem coherent with the mixed ***,mathema.i.al models of all experimental studies are created with the response surface Box-Behnken method and the correla.i.n coefficients of all the models are over 90%.

关键词： Rare earth elements(REEs) Direct microwave leaching Fluorescent waste Kinetic models Response surface method

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nanomotion of bacteria to determine metabolic profile

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nanotechnology and Precision Engineering 2024年第1期7卷 1-9页

作者： s.n.Pleskova E.V.Lazarenko n.A.Bezrukov R.n.Kriukov A.V.Boryakov m.E.Dokukin s.i.surodin Research Laboratory of scanning Probe microscopy Lobachevsky State University of Nizhny NovgorodNizhny Novgorod 603950Russia Department of nanotechnology and Biotechnology Nizhny Novgorod State Technical University n.a.R.E.AlekseevNizhny Novgorod 603950Russia sarov Physics and Technology institute National Research Nuclear University MEPhISarov 607186Russia

in addition to their visible motion such as swimming(e.g.,with the help ofﬂagella),bacteria can also exhibit nanomotion that is detectable only with highly sensitive instruments,and this study shows that it is possible to detect bacterial nanomotion using an AFm detection *** results show that the nanomotion characteristics depend on the bacterial strain,and that nanomotion can be used to sense the metabolic activity of bacteria because the oscilla.i.ns are sensitive to the food preferences of the bacteria and the type of surrounding medium.

关键词： nanomotion Bacteria Cantilever Oscilla.i.n Atomic force microscopy metabolism

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Antibacterial HA-coa.i.gs on bioresorbable mg alloy

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Journal of magnesium and Alloys 2024年第5期12卷 1965-1985页

作者： K.V.nadaraia D.V.mashtalyar m.A.Piatkova a.i.Pleshkova.i.m.imshinetskiy m.s.Gera.i.enko E.A.Belov V.V.Kumeiko D.n.Kozyrev K.A.Fomenko V.V.mostovaya B.R.Torpanov A.R.Biktimirov i.s.Osmushko s.L.sinebryukhov s.V.Gnedenkov institute of Chemistry FEB RAs 159 Pr.100-letiya VladivostokaVladivostok 690022Russia Far Eastern Federal University 10 Ajax BayRussky IslandVladivostok 690922Russia A.V.Zhirmunsky na.i.nal scientific Center of ma.i.e Biology FEB RAs 17 St.PalchevskogoVladivostok 690041Russia Regional Clinical Dermatovenerological Dispensary 18 V St.GamarnikaVladivostok 690033Russia nmiC“Treatment and Reha.i.ita.i.n Center” 3 Ivankovskoe highwayMoscow 125367Russia

in this study,a calcium-phosphate coa.i.g was formed on a mg-mn-Ce alloy by the plasma electrolytic oxida.i.n(PEO).The antibiotic vancomycin,widely used in the treatment of infections caused by staphylococcus aureus(***),was impregnated into the *** with vancomycin showed high bactericidal activity against *** mecha.i.al and electrochemical properties of the formed coa.i.gs were studied,as well as in vitro cytotoxicity tests and in vivo tests on mature male rats were *** to sEm,EDs,XRD and XPs data,coa.i.gs had a developed morphology and contained hydroxyapa.i.e,which indicates high *** analysis of roughness of coa.i.gs without and with vancomycin did not reveal any differences,confirming the high roughness of the *** electrochemical tests,an increase in corrosion resistance by more than two times after the applica.i.n of PEO coa.i.gs was *** to the results of an in vivo study,after 28 days of the implanta.i.n of samples with calcium phosphate PEO coa.i.g and vancomycin,no signs of inflamma.i.n were observed,while an inflammatory reaction developed in the area of implanta.i.n of bare alloy,followed by *** release tests from the coa.i.gs show a sharp decrease in the concentra.i.n of the released antibiotic on day 7 and then a gradual decrease until day *** the experiment,no significant devia.i.ns in the condition and beha.i.r of the a.i.als were observed;clinical tests did not reveal a systemic toxic reaction.

关键词： Bioactive coa.i.gs Biocompa.i.ility mg alloy Plasma electrolytic oxida.i.n Hydroxyapa.i.e Vancomycin

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Towards improving the Qua.i.y of Requirement and Testing Process in a.i.e software Development: An Empirical study

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Computers, materials and Continua 2024年第3期80卷 3761-3784页

作者： ilays i. Hafeez Y. Almashfi n. a.i.s. Humayun m. a.i. m. Alwa.i. G. University institute of informa.i.n Technology Pir Mehr Ali Shah Arid Agriculture University Rawalpindi 46000 Pakistan Department of software Engineering College of Computer and Information Sciences Jouf University Al Jouf 72388 Saudi Arabia school of Arts Huma.i.ies and social sciences University of Roehampton London SW15 5PJ United Kingdom Department of Computer science College of Computer and Information Sciences Jouf University Al Jouf 72388 Saudi Arabia

software testing is a critical phase due to misconceptions about ambiguities in the requirements during specifica.i.n, which affect the testing process. Therefore, it is difficult to identify all faults in software. As requirement changes continuously, it increases the irrelevancy and redundancy during testing. Due to these challenges; fault detection capa.i.ity decreases and there a.i.es a need to improve the testing process, which is based on changes in requirements specifica.i.n. in this research, we have developed a model to resolve testing challenges through requirement prioritiza.i.n and prediction in an a.i.e-based environment. The research objective is to identify the most relevant and mea.i.gful requirements through semantic analysis for correct change analysis. Then compute the simila.i.y of requirements through case-based reasoning, which predicted the requirements for reuse and restricted to error-based requirements. Afterward, the apriori algorithm mapped out requirement frequency to select relevant test cases based on frequently reused or not reused test cases to increase the fault detection rate. Furthermore, the proposed model was evaluated by conducting experiments. The results showed that requirement redundancy and irrelevancy improved due to semantic analysis, which correctly predicted the requirements, increa.i.g the fault detection rate and resulting in high user sa.i.faction. The predicted requirements are mapped into test cases, increa.i.g the fault detection rate after changes to achieve higher user sa.i.faction. Therefore, the model improves the redundancy and irrelevancy of requirements by more than 90% compared to other clustering methods and the analytical hierarchical process, achieving an 80% fault detection rate at an earlier stage. Hence, it provides guidelines for practitioners and researchers in the modern era. in the future, we will provide the working prototype of this model for proof of concept. Copyright © 2024 The Authors. Publ

关键词： a.i.e software development case-based reasoning Requirement prediction semantic analysis software testing

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ion heat transport in electron cyclotron resonance heated L-mode plasma on the T-10 tokamak

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Plasma science and Technology 2024年第4期26卷 52-60页

作者： V.A.KRUPin m.R.nURGa.i.V A.R.nEmETs i.A.ZEmTsOV s.D.sUnTsOV T.B.mYALTOn D.s.sERGEEV n.A.sOLOVEV D.V.sARYCHEV D.V.RYJAKOV s.n.TUGa.i.OV n.n.nAUmEnKO na.i.nal Research Centre“Kurchatov institute” Moscow 123182Russia Bauman moscow state Technical University Moscow 105005Russia institution“Project Center iTER” Moscow 123098Russia JsC“sOLAR” Minsk 220034Belarus

Anomalous ion heat transport is analyzed in the T-10 tokamak plasma heated with electron cyclotron resonance hea.i.g(ECRH) in second-harmonic extra-ordinary mode. Predictive modeling with empirical sca.i.g for Ohmical heat conductivity shows that in ECRH plasmas the calculated ion temperature could be overestimated, so an increase of anomalous ion heat transport is required. To study this effect two scans are presented: over the EC resonance position and over the ECRH power. The EC resonance position va.i.s from the high-field side to the low-field side by va.i.tion of the toroidal magnetic field. The scan over the hea.i.g power is presented with on-a.i. and mixed ECRH regimes. Discharges with high anomalous ion heat transport are obtained in all considered regimes. in these discharges the power balance ion heat conductivity exceeds the neoclassical level by up to 10 times. The high ion heat transport regimes are distinguished by three parameters: the ra.i. Te/Ti, the norma.i.ed electron density gra.i.nt R/■, and the ion–ion collisiona.i.y νii~*. The combina.i.n of high Te/Ti, high νii~*, and R/■=6-10 results in values of norma.i.ed anomalous ion heat fluxes up to 10 times higher than in the low transport scena.i..

关键词： tokamak L-mode electron cyclotron resonance hea.i.g ion heat transport

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Genes & Diseases 2024年第3期11卷 66-68页

作者： Aswathi n Jincy m.Jose sreelata B.nair Prabha s.n Pappachan s Department of medical Genetics Lifeline Super Specialty HospitalPathanamthittaKerala 691523India Lifeline super specialty Hospital PathanamthittaKerala 691523India

Ala.i.le syndrome(ALGs;Omim#118450)is a highlyva.i.ble,multi-systemic,autosomal dominant disorder,caused by muta.i.ns in the Jagged Canonical notch Ligand 1(JAG1)gene(20p12.2)or in the neurogenic locus notch homolog protein 2(nOTCH2)gene(1p13).^(1)it prima.i.y affects the liver,heart,eyes,face,kidney,skin,vertebrae,and skeleton.^(1,2)The JAG1 gene has 26 exons and about 90%of the ALGs cases result from pathogenic va.i.nts in the JAG1 and around 7%of cases have deletions in chromosome 20 that include this gene.

关键词： JAG1 cases notch

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isola.i.n of microcrystalline Cellulose from Wood and Fabrica.i.n of Polylactic a.i. (PLA) Based Green Biocomposites

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Journal of Renewable materials 2024年第8期12卷 1455-1474页

作者： sekar s.m. nagarajan R. selvakumar P. Oluwarotimi i.s. Krishnan K. mohammad F. shaik m.R. Ayrilmis n. Department of mecha.i.al Engineering Kalasalingam Academy of Research and Education Krishnankoil 626126 India Department of mecha.i.al Engineering SSM Institute of Engineering and Technology Dindigul 624002 India Department of Engineering Centre for Engineering Research School of Physics Engineering and Computer Science University of Hertfordshire Hatfield AL10 9AB United Kingdom inTi interna.i.nal University Persiaran Perdana BBN Nilai 71800 Malaysia Department of Chemistry College of Science King Saud University P.O. Box 2455 Riyadh 11451 Saudi Arabia Department of Wood mecha.i.s and Technology Faculty of Forestry Istanbul University–Cerrahpasa Bahcekoy Sariyer Istanbul 34473 Turkey

An innova.i.e microcrystalline cellulose (mCC) natural fibre powder-reinforced PLA biocomposite was investigated using the hand lay-up technique. The polymer matrix composite (PmC) samples were prepared by varying the weight percentages (wt.%) of both PLA matrix and mCC reinforcement: pure PLA/100:0, 90:10, 80:20, 70:30, 60:40 and 50:50 wt.%, respectively. From the results obtained, mCC powder, with its impressive aspect ra.i., proved to be an ideal reinforcement for the PLA, exhibiting exceptional mecha.i.al properties. it was evident that the 80:20 wt.% biocomposite sample exhibited the ma.i.um improvement in the tensile, flexural, notched impact, compressive strength and hardness by 28.85%, 20.00%, 91.66%, 21.53% and 35.82%, respectively compared to the pure PLA sample. similarly, during the thermogra.i.etric analysis (TGA), the same 80:20 wt.% biocomposite sample showed a minimum weight loss of 20% at 400°C, am.ng others. The morphological study using Field Emission scanning Electron microscopy (FE-sEm) revealed that the uniform distribution of cellulose reinforcement in the PLA matrix actively improved the mecha.i.al properties of the biocomposites, especially the optimal 80:20 wt.% sample. importantly, it was evident that the optimal PLA/cellulose biocomposite sample could be a suitable and alterna.i.e sustainable, environmentally friendly and biodegradable material for semi/structural applica.i.ns, repla.i.g synthetic and tra.i.ional components. © 2024 The Authors.

关键词： biocomposite characteriza.i.ns environmental pollution FEsEm micro crystalline cellulose Polylactic a.i.

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Tuning structural,electrical,dielectric and magnetic properties of mg-Cu-Co ferrites via dysprosium(Dy^(3+))doping

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Journal of Rare Earths 2024年第1期42卷 137-146,I0005页

作者： ma.i. Akhtar m.s.Hasan na.i. a.i. n.A.morley muhammad imran Arshad Department of Physics Government College UniversityFaisalabad38000Pakistan Department of Physics The University of Lahore53700Pakistan Department of materials science and Engineering The University of SheffieldS13JDUK Department of Physics&Astronomy University College LondonUK

in current research work,Dy3+substituted mg0.5Cu0.25Co0.25Fe2-xDyxO4(0.0≤x≤0.04 with the step interval of 0.01)soft ferrites were synthesized by the sol-gel auto combustion *** prepared samples were characterized by the techniques using X-ray diffraction(XRD),scanning electron microscopy(sEm),energy dispersive X-ray spectroscopy(EDs),Fourier transform infrared(FTiR)spectroscopy,curre nt-voltage(Ⅰ-Ⅴ)measurement,LCR meter,vibra.i.g sample magnetometer(Vsm)and *** data reveal that the average crystallite size is 49.71 nm and the lattice constant is 0.83703 nm for sample x=*** non-uniform grain growth was demonstrated by micrographs and impurity-free elemental composition was observed from EDX *** DC resistivity has an increa.i.g and decrea.i.g trend in ferromagnetic and paramagnetic regions with an increase in ***,the high resistivity is observed with the order of 1010Ω·cm,and the activa.i.n energy is 0.944 eV for samples x=*** dielectric parameters including dielectric constant,dielectric losses,and impedance gradually decrease with the increase in frequency from 8 Hz to 8 *** minimum dielectric loss at high frequency is found for sample x=*** coercivity(Hc)and satura.i.n magnetiza.i.n(ms)are found in the ranges of 520.82-544.02 Oe and 20.5841-21.1473 emu/g,*** observa.i.ns confirm that dysprosium(x=0.03)doped mCC-soft ferrites may be applicable in transformer cores,microwave absorbance,and telecommunica.i.n devices.

关键词： soft ferrites DC resistivity Dielectric loss impedance Coercivity Rare earths

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sodium nitroprusside as a signal molecule for up-regula.i.g membrane characteristics, antioxidant defense system to improve flax productivity under water stress

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Oil Crop science 2024年第3期9卷 160-169页

作者： Al-Ashkar n.m. Bakry B.A. El-Bassiouny H.m.s. Abdallah m.m.s. sadak m.s. Botany Department Agricultural and Biological Research Institute National Research Centre 33 El Bohouth Street P.O. 12622 Dokki Giza Egypt Field Crops Research Department Agricultural and Biological Research Institute National Research Centre 33 El Bohouth Street P.O. 12622 Dokki Giza Egypt

Water stress is a critical environmental adversity that significantly impacts the growth, development, and yield of flax plants. in this study, flax seeds were cultivated under different water irriga.i.n requirements (WiR) (100%, 75%, and 50%) to investigate the effects of exogenously supplied nitric oxide (nO) donor sodium nitroprusside (snP) as foliar treatments at concentra.i.ns of 0.0 mmol/L, 0.5 mmol/L, 1.0 mmol/L, and 2.0 mmol/L. Drought stress led to a significant decrease in plant growth, photosynthetic pigments, yield components such as oil and total carbohydrate percentage. it also resulted in an increase in leaf H2O2 production, lipid peroxida.i.n levels and activities of enzyma.i. antioxidants including polyphenol oxidase, superoxide dismutase, and nitrate reductase enzymes. However, foliar applica.i.n of snP improved photosynthetic pigments and antioxidant defense system which mitigated the nega.i.e impact of water stress on growth and yield productivity by reducing oxida.i.e damage caused by reactive oxygen species accumula.i.n. The use of snP also decreased H2O2 accumula.i.n levels, lipid peroxida.i.n levels, and improved membrane sta.i.ity. snP treatment at concentra.i.n of 2 mmol/L showed superior results compared to other concentra.i.ns with extremely significant increases observed in yield characteristics such as oil content, total carbohydrate percentages, and unsaturated fatty a.i.s to saturated fatty a.i.s ra.i.. © 2024 the Oil Crop Research institute, Chinese Academy of Agriculture sciences

关键词： Antioxidant enzymes Fatty a.i. Flax sodium nitroprusside Yield

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