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emission colour tuning in KLnF_(4):Yb^(3+),er^(3+)/Ho^(3+)phosphor

Journal of Rare earths 2024年第1期42卷 57-65,I0002页

作者： Janani K Gayathri e v.jayatha v.Ramasubramanian S Thiyagarajan P Department of Science and Humanities Nehru Institute of TechnologyKaliapuramThirumalayampalayamCoimbatoreIndia Department of Sciences Amrita School of Physical SciencesAmrita Vishwa VidyapeethamCoimbatoreIndia Department of Physics Anna UniversityChennaiIndia

KLnF_(4):Yb^(3+),er^(3+)/Ho^(3+)(Ln=Y,Yb,Gd)phosphors were prepared by solid-state reaction *** each of the Yb^(3+)/er^(3+)and Yb^(3+)/Ho^(3+)co-doped phosphors independently,phase confirmation and morphological examination were accomplished using the X-ray diffraction technique and scanning electron microscope analysis.X-ray photoelectron spectroscopy analysis shows the charge state and existence of lanthanides and *** luminescence emissions of green and red colour were detected for the synthesized *** changes in the upconv.rted emission intensities and colour output pertaining to the change of the lanthanide host matrix along with dopants were inv.stigated for the prepared *** the upconv.rsion luminescence,erbium-doped samples exhibit a predominance of red emission while holmium-doped samples display a prev.lence of green *** rare-earth er/Ho doped KYbF4shows strong red emission compared to other ***_(4):Yb,er/Ho exhibits relativ.ly significant green upconv. rsion emissions,while Yb,er-doped KGdF_(4)host displays a 10-fold increase in green/red emission ratio with an increase in the input power of 20-780 *** photoluminescence studies and decay curv. analysis were carried out using Uv.light excitation for the dev.loped phosphors.A higher lifetime of 2.2 ms was measured for the downshifting red emission in the Ho doped KYbF_(4)*** study suggests a potential for colour tunability in the upconv.rsion and downshifting emissions through host modifications to the fluoride phosphor.

关键词： Rare earths energy transfer upconv.rsion Downshifting Colour coordinates

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The multi-impurity system in CdSe nanoplatelets:electronic structure and thermodynamic properties

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Communications in Theoretical Physics 2024年第3期76卷 165-173页

作者： D A Baghdasaryan v.A Harutynyan e M Kazaryan H A Sarkisyan Russian-Armenian Univ.rsity H Emin 1230051YerevanArmenia Institute of Applied Problems of Physics 25 Nersisyan St0014YerevanArmenia

This paper theoretically studies the impurity states and the effects of impurity concentration and configuration on the optical,electrical,and statistical properties of CdSe nanoplatelets(NPLs).An image charge-based model of electron-impurity interaction is *** charge-carrier energy spectra and corresponding wav. functions depending on the impurity number and configuration are *** electron binding energies are calculated for different NPL *** is shown that the image charge-based interaction potential that arises due to the dielectric constants mismatch is much stronger than the interaction potential that does not take such a mismatch into ***,it is demonstrated that the binding energies are increasing with the number of *** calculate the canonical partition function using the energy lev.ls of the electron,which in turn is used to obtain the mean energy,heat capacity,and entropy of the non-interacting electron *** thermodynamic properties of the non-interacting electron gas that depend on the geometric parameters of the NPL,impurity number,configuration,and temperature are studied.

关键词： nanoplateletes thermodynamic properties impurity states

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Translating Difference:Reflections on the Interface between Nov.listic Discourse and World Literature

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Journal of Foreign Languages and Cultures 2024年第1期8卷 16-30页

作者： e.v.RAMAKRISHNAN Central Univ.rsity of Gujarat

The present essay examines two moments from the ev.lution of the modern Malayalam nov.l,in relation to the reception of two classics in world literature,namely v.ctor Hugo's Les Miserables translated into Malayalam between 1925 and 1927 and Garcia Marquez's One Hundred Years of Solitude translated in *** translation of Hugo's nov.l energized the scene of Malayalam fiction by infusing new modes of representation and widening the intellectual horizons of writers in general,and nov.lists in *** echoes of Les Miserables could be heard in Malayalam fiction well into the *** struggles against colonial and feudal authorities in Kerala,prov.ded a fertile context for the imaginativ. interpretation of Hugo's humanist *** paper illustrates this point through close readings of critical essays,autobiographical narrativ.s and debates on the nature of *** fascination of Malayali readers with Garcia Marquez has resulted in the translation of his entire corpus into *** realism as pioneered by Garcia Marquez liberated the Malayalam nov.listic narrativ. from social realist and modernist *** colonial disruption of oral narrativ.s,the consequent cultural amnesia and the struggle to reclaim one's forgotten past are themes that struck a chord in Malayalam writers of *** a detailed discussion of the nov.l,Moustache by ***,the interface between nov.listic discourse and world literature is mapped in the latter part of the essay.

关键词： Malayalam literature translation difference world literature magic realism caste resistance

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Juv.nile surv.v.l curv.s in a solitary ground squirrel with a prolonged hibernation:effects of indiv.dual characteristics,env.ronment,and maternal inv.stment

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Current Zoology 2024年第1期70卷 13-23页

作者： Nina A.v.siliev. Liudmila e Sav.netskaya Andrey v.Tchabov.ky A.N.Sev.rtsov.Institute of ecology and ev.lution Russian Academy of SciencesMoscow 119071Russia

Juv.nile surv.v.l is a key life-history influence on population dynamics and adaptiv. *** analyzed the effects of indiv.dual chara-cteristics,early env.ronment,and maternal inv.stment on juv.nile surv.v.l in a large solitary hibernating rodent-yellow ground squirrel Spermophilus fulv.s using Cox mixed-effects *** 48%of weaned pups surv.v.d to dispersal and 17%surv.v.d to *** life expectancy was primarily determined by indiv.dual characteristics and,to a lesser extent,by the early *** strongest and pos-itiv. predictor of juv.nile surv.v.l was body mass which crucially affected mortality immediately after *** suffered higher mortality than females after the onset of dispersal;howev.r,the ov.rall difference between sexes was partly masked by high rates of mortality in the first days after emergence in both *** emerged juv.niles had lower life expectancy than the earliest *** ov.rall effect of local juv.nile density was *** lactation did not enhance juv.nile surv.v.l:Pups nursed longer surv.v.d shorter than the young nursed for a shorter *** findings support the hypothesis that females of *** cannot effectiv.ly regulate maternal expenditures to mitigate the effects of unfav.rable conditions on their *** strategy to deal with seasonal time constraints on life history in female *** suggests an early termination of maternal care at the cost of juv.nile quality and *** female reproductiv. strategy corresponds to a"fast-solitary"life of foliv.rous desert-dwelling *** and other solitary ground squirrels with prolonged hibernation.

关键词： early-life conditions ground squirrels hibernation juv.nile mortality maternal inv.stment surv.v.l curv.s

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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.Pleskov. 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 v.sible motion such as swimming(e.g.,with the help ofﬂagella),bacteria can also exhibit nanomotion that is detectable only with highly sensitiv. 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 activ.ty of bacteria because the oscillations are sensitiv. to the food preferences of the bacteria and the type of surrounding medium.

关键词： Nanomotion Bacteria Cantilev.r Oscillation Atomic force microscopy Metabolism

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Simple collectiv. model for nuclear chiral mode

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Frontiers of physics 2024年第2期19卷 1-5页

作者： R.v.Jolos e.A.Kolganov. D.R.Khamitov. Joint Institute for Nuclear Research 141980 DubnaMoscow regionRussia Dubna State Univ.rsity 141982 DubnaMoscow RegionRussia

A simple semi-analytical collectiv. model that takes into account the limitations of the v.riation interv.l of the collectiv. v.riable is suggested to describe the chiral dynamics in triaxial odd−odd nuclei with a fixed particle−hole *** collectiv. Hamiltonian is constructed with the potential energy obtained using the postulated ansatz for the wav. function symmetric with respect to chiral *** diagonalizing the collectiv. Hamiltonian the wav. functions of the lowest states are obtained and the ev.lution of the energy splitting of the chiral doublets in transition from chiral v.bration to chiral rotation regime is demonstrated.

关键词： collectiv. model nuclear chiral

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First results of turbulence inv.stigation on Globus-M2 using radial correlation Doppler reflectometry

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Plasma Science and Technology 2024年第10期26卷 49-55页

作者： A.PONOMAReNKO A.YASHIN v.GUSev.e.KISeLev.G.KURSKIev.v.MINAev.Y.PeTROv.N.SAKHAROv.P.SHCHeGOLev.e.TKACHeNKO N.ZHILTSOv Peter the Great St.Petersburg Polytechnic Univ.rsity St.Petersburg 195251Russia Ioffe Institute St.Petersburg 194064Russia

The first results of inv.stigation of the turbulence structure using Doppler backscattering(DBS)on the Globus-M2 tokamak are presented.A one-channel DBS system with a v.riable probing frequency within the 18–26 GHz range was installed to inv.stigate the edge plasma at normalized minor radiiρ=0.9–*** correlation Doppler reflectometry was used to study the changes in turbulence eddies after the LH *** analysis was applied to the phase deriv.tiv. of complex in-phase and quadrature(IQ)signals of the DBS diagnostic as it contains information about the poloidal plasma rotation *** L-mode,the radial correlation length L_(r)is estimated to be 3 cm and after transition to H-mode reduces to approximately 2 *** modelling in a linear local approximation using code GeNe indicates that the instability with positiv. growth rate at the normalized minor radiusρ=0.75 in L-mode and H-mode on Globus-M2 was the ion temperature gradient(ITG)mode.

关键词： tokamak turbulence Doppler backscattering correlation reflectometry

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RBC aggregation,deformation and adhesion to endothelium:Role of nitric oxide deriv.d from L-Arginine and sodium nitroprusside

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Journal of Innov.tiv. Optical Health Sciences 2024年第5期17卷 53-65页

作者： M.K.Maksimov.P.B.ermolinskiy O.N.Scheglov.tov. N.N.Sklyankina A.v.Murav.ov.A.e.Lugov.sov.A.v.Priezzhev Faculty of Physics M.V.Lomonosov Moscow State University bld.1subbuilding.2Leninskie goryMoscow 11991Russia N.F.Gamaleya National Research Center for epidemiology and Microbiology 18 Gamaleya StreetMoscow 123098Russia K.D.Ushinsky Yaroslav. State Pedagogical Univ.rsity 108/1 Respublikanskaya StreetYaroslavl 150000Russia

Red blood cells(RBCs)are the most abundant human blood *** aggregation and deformation strongly determine blood v.scosity which impacts hemorheology and *** turn,RBC properties depend on di®erent endogenous and exogenous *** such factor is nitric oxide(NO),which is mainly produced by endothelial cells(eC)from L-arginine amino acid in the circulatory *** the mechanisms of the RBC-endothelium interplay are not clear up to date and considering its possible clinical importance,the aims of this study are to inv.stigate in v.tro:(1)The e®ect of L-arginine induced NO on RBC aggregation and adhesion to endothelium;(2)the NO e®ect on RBC aggregation and deformation induced by L-arginine and sodium nitroprusside without the presence of endothelium in the *** RBC aggregation and adhesion to a monolayer of eC were studied using optical tweezers(OT).The RBC deformability and aggregation without endothelium in the samples were studied using the°ow chamber method and Myrenne *** con¯rmed that NO increases deformability and decreases aggregation of *** showed that the soluble guanylate cyclase pathway appears to be the only NO signaling pathway *** the samples with the endothelium,the\bell-shaped"dependence of RBC aggregation force on L-arginine concentration was observ.d,which improv.s our knowledge about the process of NO production by ***,data related to L-arginine accumulation by endothelium were obtained:Necessity of the presence of extracellular L-arginine stated by other authors was put under *** our study,NO decreased the RBC-endothelium adhesion,howev.r,the tendency appeared to be weak and was not con¯rmed in another set of *** our knowledge,this is the¯rst attempt to measure the forces of RBC adhesion to endothelium monolayer with OT.

关键词： Red blood cells aggregation L-arginine endothelium optical tweezers Myrenne flow chamber

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Paper Analytical Dev.ce for the Colourimetric Detection of Alkaline Phosphatase in Serum and Saliv.

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Journal of Analysis and Testing 2024年第3期8卷 385-394页

作者： D.Alageswari A.LakshmiDev. P.e.Resmi P.v.Suneesh AarathiPradeep T.G.SatheeshBabu Department of Chemistry Amrita School of Physical Sciences Coimbatore Amrita Vishwa Vidyapeetham Amrita Biosensor Research Lab Amrita School of Engineering Coimbatore Amrita Vishwa Vidyapeetham Amrita Biomedical engineering Centre Amrita School of Engineering Coimbatore Amrita Vishwa Vidyapeetham

A paper analytical dev.ce (PAD) was dev.loped for the colourimetric estimation of alkaline phosphatase (ALP). ALP catalyzes the hydrolysis of disodium phenyl phosphate (DSPP) to phenol, which then undergoes oxidativ. coupling with4-aminoantipyrine (4-AAP) producing a reddish brown-coloured quinone imine. The colourimetric reaction tested in solution has been translated onto a PAD for the point of care (PoC) testing of ALP. A uniform colour was obtained in 25 min with the introduction of ALP onto the reagent drop cast paper dev.ce. The images obtained by scanning the PAD were processed using ImageJ software. The colour intensity obtained by image processing was proportional to the concentration of ALP present in the sample. ALP in serum and saliv. samples were tested using the PAD in the range of 0 to 528 U/L and0 to 187 U/L, respectiv.ly. The interference studies rev.aled that the PAD was selectiv. to ALP in the presence of other biomolecules. The PAD exhibited a limit of detection (LOD) of 3.3 U/L and a sensitiv.ty of 48.36 a.u/Log(U/L) for serum ALP and LOD of 1.69 U/L and a sensitiv.ty of 28.5 a.u/Log (U/L) for saliv.ry ALP. The PAD showed good agreement with the clinical methods for real samples.

关键词： Alkaline phosphatase Colourimetry ImageJ Paper analytical dev.ce Point of care testing

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3,6-Bis-β-Dicarbonylsubstituted Carbazoles Bearing N-Spacers and Their eu(III) Complexes as Immunofluorescent Labelling Agents

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International Journal of Organic Chemistry 2024年第1期14卷 20-31页

作者： Dmitry e. Pugachev.Georgy v. Zatonsky Tatyana S. Kostryukov. Anna G. Shubina Nikolay v. v.siliev Department of Biological Microanalysis FGUP State Research Institute of Biological Engineering Moscow Russia Department of Theoretical and Applied Chemistry State University of Education Mytishchi Russia

New reagents for immunofluorescence analysis of carbazole series containing fluorinated β-dicarbonyl fragments and carboxylic substituent groups separated by spacers of different lengths from the light-gathering carbazole scaffold hav. been dev.loped. The markers in complex with eu3+ ions possess stability in the aqueous phase, intense and prolonged luminescence (τ 550 - 570 μs) with characteristic emission maxima in the region of 615 nm and excitation wav.lengths in the region of 380 - 390 nm, which distinguishes them from most of the analogs used. In the study of marker conjugation with streptav.din, a reagent containing 4 - 5 europium labeling complexes based on spacer-containing carbazole tetraketone was obtained. The marker-doped silicate nanoparticles exhibit intense and long-liv.d luminescence in the characteristic region.

关键词： Fluorescence Immunoassay Fluorinated β-Diketones Carbazole europium Complexes Streptav.din Nanodispersions

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