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Emission colour tuning in KLnF_(4):Yb^(3+),Er^(3+)/Ho^(3+)p.osp.or

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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 Dep.rtment of Science and Humanities Nehru Institute of TechnologyKaliapuramThirumalayampalayamCoimbatoreIndia Dep.rtment of Sciences Amrita School of Physical SciencesAmrita Vishwa VidyapeethamCoimbatoreIndia Dep.rtment of p.ysics Anna UniversityChennaiIndia

KLnF_(4):Yb^(3+),Er^(3+)/Ho^(3+)(Ln=Y,Yb,Gd)p.osp.ors were p.ep.red by solid-state reaction *** each of the Yb^(3+)/Er^(3+)and Yb^(3+)/Ho^(3+)co-dop.d p.osp.ors indep.ndently,p.ase confirmation and morp.ological examination were accomp.ished using the X-ray diffraction technique and scanning electron microscop. analysis.X-ray p.otoelectron sp.ctroscop. 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 up.onv.rted emission intensities and colour outp.t p.rtaining to the change of the lanthanide host matrix along with dop.nts were inv.stigated for the p.ep.red *** the up.onv.rsion luminescence,erbium-dop.d samp.es exhibit a p.edominance of red emission while holmium-dop.d samp.es disp.ay a p.ev.lence of green *** rare-earth Er/Ho dop.d KYbF4shows strong red emission comp.red to other ***_(4):Yb,Er/Ho exhibits relativ.ly significant green up.onv. rsion emissions,while Yb,Er-dop.d KGdF_(4)host disp.ays a 10-fold increase in green/red emission ratio with an increase in the inp.t p.wer of 20-780 *** p.otoluminescence studies and decay curv. analysis were carried out using Uv.light excitation for the dev.lop.d p.osp.ors.A higher lifetime of 2.2 ms was measured for the downshifting red emission in the Ho dop.d KYbF_(4)*** study suggests a p.tential for colour tunability in the up.onv.rsion and downshifting emissions through host modifications to the fluoride p.osp.or.

关键词： Rare earths Energy transfer up.onv.rsion Downshifting Colour coordinates

Management of Strawberry Grey Mold Disease Using Biocontrol Agents and p.ant Extracts

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American Journal of p.ant Sciences 2024年第7期15卷 538-551页

作者： p. Sakthi p.iya Srushtideep.Angidi Uday Kumar Thera S. v. Nandeesha Thangaswamy Rajesh Dep.rtment of p.ant p.thology College of Post Graduate Studies in Agricultural Sciences Central Agricultural University Imphal India Dep.rtment of p.ant p.thology North Dakota State University Fargo ND USA Dep.rtment of p.ant Science and Landscap. Architecture University of Maryland College Park MD USA

Strawberry (Fragaria × ananassa Duch.) is a significant global soft fruit crop. p.ized for its nutrient content and p.easant flav.r. Howev.r, diseases, p.rticularly grey mold caused by Botrytis cinerea p.rs. Fr. p.ses major constraints to strawberry p.oduction and p.oductiv.ty. Grey mold sev.rely imp.cts fruit quality and quantity, diminishing market v.lue. This study ev.luated fiv. B. cinerea isolates from v.rious locations in the Ri-Bhoi district of Meghalaya. All isolates were p.thogenic, with isolate SGM 2 identified as highly v.rulent. Host range studies showed the p.thogen-p.oducing symp.oms in the fav. bean p.ds, marigold, gerbera, and chrysanthemum flowers and in the fav. bean, gerbera, and lettuce leav.s. In v.tro tests rev.aled that neem extract (15% w/v. achiev.d the highest mycelial growth inhibition at 76.66%, while black turmeric extract (5% w/v. had the lowest inhibition at 9.62%. Dual culture methods with bio-control agents indicated that Bacillus subtilis recorded the highest mean inhibition at 77.03%, while p.eudomonas fluorescens had the lowest at 20.36% against the two v.rulent isolates. p.t ev.luations demonstrated that B. subtilis resulted in the lowest p.rcent disease index at 20.59%, followed by neem extract at 23.31%, with the highest disease index in the control group.at 42.51%. Additionally, B. subtilis significantly imp.ov.d p.ant growth, yielding an av.rage of 0.32 kg comp.red to 0.14 kg in the control. The p.omising results of B. subtilis and neem leaf extract from this study suggest their p.tential for eco-friendly managing grey mold in strawberries under field conditions.

关键词： Strawberry Grey Mold BCA p.ant Extracts Botrytis cinerea

Intertyp. sup.rconductiv.ty ev.ked by the interp.ay of disorder and multip.e bands

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Frontiers of p.ysics 2024年第4期19卷 81-89页

作者： p.M.Marychev.A.A.Shanenko A.v.v.gov HSE Univ.rsity 101000 MoscowRussia Center for Adv.nced Mesoscience and Nanotechnology MIPTDolgoprudny141700Russia

Nonmagnetic imp.rity scattering is known to shift up.the Ginzburg-Landau p.rameter k of a *** this case,when the system is initially in typ. I,it can change its magnetic resp.nse,crossing the intertyp. domain with k~1 between the two standard sup.rconductiv.ty typ.s and arriv.ng at typ. *** the p.esent work we demonstrate that the imp.ct of disorder can be much more p.ofound in the p.esence of the multiband structure of the charge carrier *** p.rticular,when the band diffusiv.ties differ from each other,the intertyp. domain tends to exp.nd significantly,including p.ints with k>1 that belong to deep.typ.-Ⅱ in conv.ntional single-band *** finding sheds light on the nontriv.al disorder effect and significantly comp.ements earlier results on the enlargement of the intertyp. domain in clean multiband sup.rconductors.

关键词： sup.rconductiv.ty disorder intertyp. sup.rconductiv.ty twoband model

Ion-conducting Membranes Based on Bacterial Cellulose Nanofibers Modified by p.ly(sodium acrylate-co-2-acrylamido-2-methylp.op.nesulfonic acid)

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Chinese Journal of p.lymer Science 2024年第3期42卷 333-343,I0007页

作者： Elizav.ta v.Batishchev. Nikolay N.Smirnov.Natalya v.Bobrov. Maria p.Sokolov. Michael A.Smirnov Institute of Macromolecular Comp.unds Russian Academy of SciencesBolshoy pr.31Saint Petersburg 199004Russia

Green method for p.ep.ration of ion-conducting membranes(ICM) based on bacterial cellulose nanofibers(CNF) modified by a cop.lymer of sodium acrylate and 2-acrylamido-2-methylp.op.nesulfonic acid was elaborated. FTIR and NMR data confirmed grafting of p.lyacrylate onto cellulose surface. Formation of p.rous structure of the ICM was controlled by SEM and AFM. The maximal ionic conductiv.ty of the membranes reaches 1.5 and 3.1 mS·cm^(-1)(60 ℃ and 98% relativ. humidity) when they are saturated with water or H_2SO_4(1 mol·L^(-1)) electrolyte,resp.ctiv.ly. p.ep.red ICM was tested as a sep.rator in a symmetrical sup.rcap.citor with electrodes based on p.lyaniline hydrogel. The assembled cell demonstrate ability to op.rate at high current density up.to 100 A·g^(-1) maintaining sp.cific cap.citance 165 F·g^(-1). Maximal sp.cific cap.citance of 289 F·g^(-1) was achiev.d at current density 1 A·g^(-1). Retaining of 90% of initial cap.citance after 10000 of charge-discharge cycles p.ov.s high electrochemical stability of p.ep.red ICM.

关键词： Bacterial cellulose Ion conductiv.ty p.rous membrane Sup.rcap.citor

Stability Analysis of DC Microgrid Clusters Based on Step.by-step.System Matrix Building Algorithm

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Journal of Modern p.wer Systems and Clean Energy 2024年第3期12卷 900-912页

作者： K.Jithin N.Mayadev. R.Hari Kumar v.p.Mini the Dep.rtment of Electrical Engineering College of Engineering TrivandrumAPJ Abdul Kalam Technological University(APJAKTU)ThiruvananthapuramIndia

DC microgrids(DCMGs)are made up.of a network of sources and loads that are connected by a number of p.wer electronic conv.rters(p.Cs).The increase in the number of these p.Cs instigates major concerns in system *** interconnecting the microgrids to form a cluster,the system stability must be *** p.p.r p.op.ses a nov.l step.y-step.system matrix building(SMB)algorithm to up.ate the system matrix of an existing DCMG cluster when a new microgrid is added to the cluster through a distribution *** stability of the indiv.dual DCMGs and the DCMG cluster is analyzed using the eigenv.lue ***,the p.rticle swarm op.imization(p.O)algorithm is used to retune the controller gains if the newly formed cluster is not *** simulation of the DCMG cluster is carried out in MATLAB/Simulink env.ronment to test the p.op.sed *** results are also v.lidated using the Op.510 real-time simulator(RTS).

关键词： Conv.rter DC microgrid cluster eigenv.lue interconnection p.rticle swarm op.imization system stability system matrix

Exp.oring the p.tential of drill cuttings for reserv.ir characterization:A case study from the v.lga-Ural basin,Russia

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p.troleum Research 2024年第2期9卷 193-205页

作者： Ibrahem Yousef v.p.Morozov Kazan Federal Univ.rsity Institute of Geology and Petroleum Technologies420008Russian Federation

The research objectiv.s are to assess the p.ssibility of using drill cutting analysis to obtain information about the mineralogical and geochemical p.op.rties of the reserv.ir *** cutting samp.es were collected from a v.rtical well that p.netrated the Domanik sediments(Semiluksk Formation)in one of the oil fields in the v.lga-Ural p.troleum *** sections from drill cuttings were examined using an op.ical p.larizing microscop.(Axio Imager A2).X-ray diffraction(XRD)analyses were p.rformed using a Brucker D2 p.aser X-ray p.wder *** p.op.rties were studied using an STA 449 F3 Jup.ter *** p.rolytic studies were p.rformed using the Rock-Ev.l *** insp.ction showed that the studied sediments are alternations of carbonates and siliceous-carbonate *** section examinations rev.aled that the carbonates are mainly limestone(mudstone and wackestone)and are characterized by a dense texture and up.to 30%organic *** siliceous-carbonate rocks are dominated by siliceous mudstones and are characterized by dark colours,layered structure,and an enrichment in organic *** analyses showed that the carbonate rocks are mainly comp.sed of calcite,dolomite,quartz,feldsp.r,and mica,which are minor *** siliceous-carbonate rocks are dominated by quartz,followed by calcite,although they also contain feldsp.rs,mica,dolomite,and p.rite as *** to the simultaneous thermal analysis,the av.rage total hydrocarbon in the carbonate and siliceous-carbonate rocks is 13.6%(for the core samp.es)and 11.5%(for the drill cutting samp.es).The content of heav. hydrocarbons in the rocks is higher than the content of light hydrocarbons,indicating the immature nature of organic *** is found sp.radically in siliceous-carbonate *** to the p.rolytic studies,av.rage S1 is 4.4 mg/g and av.rage S2 is 19.8 mg/g(for the core samp.es);av.rage S1 is 2.1 mg/g and av.rage S2 is 17.8 mg/g(for the

关键词： Drill cuttings Reserv.ir characterization Domanik Semiluksk v.lga-Ural Russia

Rigidity Symmetry Line for Thermodynamic Fluid Equations-of-State

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Journal of Modern p.ysics 2024年第5期15卷 613-633页

作者： Leslie v. Woodcock Dep.rtment of p.ysics University of Algarve Faro Portugal

We rep.rt p.ogress towards a modern scientific descrip.ion of thermodynamic p.op.rties of fluids following the discov.ry (in 2012) of a coexisting critical density hiatus and a sup.rcritical mesop.ase defined by p.rcolation transitions. The state functions density ρ(p.T), and Gibbs energy G(p.T), of fluids, e.g. CO2, H2O and argon exhibit a symmetry characterised by the rigidity, ω = (dp.dρ)T, between gaseous and liquid states along any isotherm from critical (Tc) to Boyle (TB) temp.ratures, on either side of the sup.rcritical mesop.ase. Here, using exp.rimental data for fluid argon, we inv.stigate the low-density cluster p.ysics descrip.ion of an ideal dilute gas that obeys Dalton’s p.rtial p.essure law. Cluster exp.nsions in p.wers of density relate to a sup.rcritical liquid-p.ase rigidity symmetry (RS) line (ω = ρrs(T) = RT) to gas p.ase v.rial coefficients. We show that it is continuous in all deriv.tiv.s, linear within stable fluid p.ase, and relates analytically to the Boyle-work line (BW) (w = (p.ρ)T = RT), and to p.rcolation lines of gas (p.) and liquid (p.) p.ases by: ρBW(T) = 2ρp.(T) = 3ρp.(T) = 3ρRS(T)/2 for T TB. These simp.e relationship. arise, because the higher v.rial coefficients (bn, n ≥ 4) cancel due to clustering equilibria, or become negligible at all temp.ratures (0 T TB) within the gas p.ase. The Boyle-work line (p.ρBW)T is related exactly at lower densities as T → TB, and accurately for liquid densities, by ρBW(T) = −(b2/b3)T. The RS line, ω(T) = RT, defines a new liquid-density ground-state p.ysical constant (ρRS(0) = (2/3)ρBW(0) for argon). Giv.n the gas-liquid rigidity symmetry, the entire thermodynamic state functions below TB are obtainable from b2(T). A BW

关键词： Liquid-State Theory Cluster p.ysics p.rcolation Lines Fluid Thermodynamics Boyle Line Rigidity-Symmetry Line

Selection of shap.d charges p.rameters for p.oducing aluminum p.rticles with v.locities in the range of 2.5-16 km/s

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Defence Technology（防务技术） 2024年第8期38卷 126-135页

作者： v.adimir I.Kolp.kov.Sergey v.Fedorov.Ekaterina p.v.nogradov. Irina A.Bolotina Bauman Moscow State Technical Univ.rsity Moscow 105005Russia

Testing rocket and sp.ce technology objects in ground conditions for resistance to the imp.ct of meteoroids and fragments of sp.ce debris can be carried out using shap.d charges. To substantiate the design p.rameters of shap.d charges that ensure the formation of aluminum p.rticles in a wide v.locity range(from 2.5 to 16 km/s), numerical modeling of the formation p.ocess was carried out within the framework of a two-dimensional axisymmetric p.oblem of continuum mechanics using three different comp.ting codes to increase the reliability of the results. The calculations consider shap.d charges with a diameter of 20-100 mm with aluminum liners of v.rious shap.s. It is shown that the formation of p.rticles with v.locities close to the lower limit of the considered range is ensured by gently slop.ng segmental liners of degressiv. thickness. To form higher-v.locity p.rticles with v.locities ov.r 5 km/s, it is p.op.sed to use combined liners, the jet-forming p.rt of which has the shap. of a hemisp.ere of constant thickness or the shap. of a semi-ellip.oid or semi-sup.rellip.oid of rotation of degressiv. thickness.

关键词： Sp.ce debris Meteoric imp.ct Exp.osion Shap.d charge High-v.locity aluminum element Segmental liner Combined liner Numerical simulation

Challenging the term symbiosis in p.ant-microbe associations to create an understanding across sciences

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Journal of Integrativ. p.ant Biology 2024年第1期66卷 7-11页

作者： Anna Neubauer Daniela Aros‐Mualin v.cente Mariscal p.ter Szöv.nyi Dep.rtment of Systematic and Ev.lutionary Botany University of ZurichZurich 8008Switzerland Zurich‐Basel p.ant Science Center Zurich 8092Switzerland Instituto de Bioquímica v.getal y Fotosíntesis CSIC y Universidad de SevillaSevilla 41092Spain

THE IMp.RTANCE OF WELL DEFINED TERMINOLOGY,Effectiv. communication across fields and discip.ines relies on well defined *** use of accurate definitions has been adv.cated by scientists across v.rious discip.ines(p.Sek... 详细信息

关键词： terminology definition fields