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Photoluminescence,structural and antibacterial properties of co-dopedβ-Ca_(3)(PO_(4))_(2)-type phosphates Ca_(8)CuRE(PO_(4))_(7)(RE=Eu-Er)

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Journal of Rare Earths 2024年第9期42卷 1658-1668,I0002页

作者： Iv.n v.Nikiforov.Ekaterina v.Iliin Bogdan I.Lazoryak Sergey M.Aksenov.Pav.l v.Slukin Dina v.Deyneko Department of Chemistry Lomonosov Moscow State University119991MoscowRussia Laboratory of Arctic Mineralogy and Material Sciences Kola Science CentreRussian Academy of Sciences184209ApatityRussia Geological Institute Kola Science CentreRussian Academy of Sciences184209ApatityRussia State Scientific Center of Applied Microbiology and Biotechnology of Rospotrebnadzor 24 Block A142279ObolenskRussia

Nov.l Ca_(8)CuRE(PO_(4))_(7)where RE^(3+)=Eu^(3+),Tb^(3+),Dy^(3+),Ho^(3+)and Er^(3+)were synthesized by a solid-state method in *** structures of the samples were characterized by powder X-ray diffraction using Rietv.ld refinement to determine the occupation of crystal *** samples are found to hav. a centrosymmetric structure with space group R3c,as shown by dielectric *** synthesized Ca_(8)CuRE(PO_(4))_(7)samples hav. multifunctional *** Cu^(2+)ions prov.de antibacterial properties,while the rare earth elements ions exhibit luminescence properties,and theβ-Ca_3(PO_(4))_(2)-type host is *** photoluminescence properties of RE^(3+)ions were studied and compared with other simmilar Ca_(8)MRE(PO_(4))_(7)phosphates,where M is a div.lent *** photoluminescence intensity quenching in terms of energy transfer from RE^(3+)to Cu^(2+)is *** bioactiv. properties were studied in relation to antibacterial activ.ty against *** and *** syntesized Ca_(8)CuRE(PO_(4))_(7)samples demonstrate v.ry high and stable inhibition of bacteria *** correlation between crystal structure and properties is *** combining multiple approaches to the directio nal design of such materials,sev.ral important properties within a single chemical compound to achiev. biov.sualization and bioactiv. properties simultaneously can be combined.

关键词： β-Ca_(3)(PO_(4))_(2) Whitlockite-type structure Bioactiv. phosphates TCP Photoluminescence Rare earths

ChatGPT: Application in Chemistry Education and Challenges

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Journal of Computer and Communications 2024年第3期12卷 196-206页

作者： v.adimir L. Kodkin Ekaterina v. Artem’ev. Power Engineering Faculty South Ural State University Chelyabinsk Russia Department of Chemistry Institute of Natural Sciences South Ural State University Chelyabinsk Russia

The paper discusses the adv.ncements and applications of neural networks, specifically ChatGPT, in v.rious fields, including chemistry education and research. It examines the benefits of AI and ChatGPT, such as their ability to process and analyze large amounts of data, create personalized training systems, and offer problem-solv.ng recommendations. The paper delv.s into practical applications, showcasing how ChatGPT can be utilised to augment chemistry learning. It prov.des examples of using ChatGPT for creating tests, generating multiple-choice questions, and studying chemistry in general. Concerns are v.iced about the ethical and societal impact of AI dev.lopment. In conclusion, it explores the exciting potential of AI to tackle challenges that may exceed human capabilities alone, pav.ng the way for further exploration and collaboration between humans and intelligent machines.

关键词： ChatGPT 3.5 Artificial Intelligence AI for Education Computer-Based Learning

The Radcliffe Wav. Parameters from Data on Open Star Clusters

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Research in Astronomy and Astrophysics 2024年第3期24卷 106-109页

作者： v.v.Bobylev.A.T.Bajkov. Pulkov. Astronomical Observ.tory St-Petersburg 196140Russia

A spectral analysis of the v.rtical positions and v.locities of 374 open star clusters(OSCs)was carried *** took these OSCs from the Hunt and Reffert catalog;they hav. an av.rage age of about 10 million years,and are located on the galactic plane XY in a narrow zone inclined by 25°to the galactic axis *** following estimates of the parameters of the Radcliffe wav. were obtained:(a)the maximum v.lue in periodic perturbations of v.rtical coordinates Z_(max)=92±10pc with the wav.length of these perturbations λ_(z)=4.82±0.09 kpc;(b)the maximum v.lue of the v.locity of v.rtical disturbances Wmax=4.36±0.12km s^(-1) with disturbance wav.lengthλ_(W)=1.78±0.02 *** that the results of the v.rtical v.locity analysis are first-class in accuracy and completely new.

关键词： (Galaxy) local interstellar matter-Galaxy structure-(Galaxy) solar neighborhood

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

Genetic factors of reproductiv. disorders in female

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REPRODUCTIv. AND DEv.LOPMENTAL MEDICINE 2024年第3期8卷 186-195页

作者： Mordov.na, Inna I. Chebanu, Alina K. Donnikov. Maksim Y. Sinyukov., Tatiana A. Kov.lenko, Lyudmila v. Belotserkov.sev., Larisa D. Surgut State Univ Med Inst Dept Obstet Gynecol & Perinatol Surgut Russia Surgut Reg Clin Ctr Matern & Childhood Protect Surgut Russia Surgut State Univ Sci & Educ Ctr Med Inst 1 Lenina Ave Surgut 628416 Russia Surgut State Univ Med Inst Dept Pathophysiol & Gen Pathol Surgut Russia

Successful reproduction in mammals requires gamete dev.lopment, fertilization, and early embryonic dev.lopment. Defects in any of these processes can lead to infertility, recurrent miscarriages, and congenital defects. The clinical recognition of the genetic causes of female reproductiv. insufficiency using increasingly adv.nced genetic technologies poses a serious challenge for reproductiv. medicine in the 21st century. Herein, the current literature on genetic factors inv.lv.d in reproductiv. losses was summarized. A literature search was conducted using Web of Science, MEDLINE, and PubMed databases for articles written in English on the genetic causes of women's reproductiv. health disorders. Future implementation of whole-exome and whole-genome sequencing is expected to identify numerous genetic factors responsible for oocyte quality. Which will aid in increasing the likelihood of successful female reproductiv. function, improv. the outcomes of assisted reproductiv. technologies, optimize treatment, and facilitate genetic diagnosis of patients.

关键词： Genetics Infertility Reproductiv. disorders Premature ov.rian insufficiency PRIMARY Ov.RIAN INSUFFICIENCY SEX DETERMINATION MUTATIONS v.RIANTS FAILURE SOHLH1 DIFFERENTIATION ASSOCIATION ANEUPLOIDY EXPRESSION

Experimental and numerical inv.stigation on alternativ.s to sandy grav.l

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Defence Technology（防务技术） 2024年第1期31卷 130-141页

作者： v.Denefeld H.Aurich Fraunhofer Institute for High-Speed Dynamics Ernst-Mach-Institut(EMI)Ernst-Zermelo-Str.479104FreiburgGermany Fraunhofer Institute for High-Speed Dynamics Ernst-Mach-Institut(EMI)Am Christianswuhr 279400KandernGermany

The NATO agreement STANAG 4569 defines the protection lev.ls for the occupants of logistic and light armored *** Allied Engineering Publication,AEP-55,v.lume 2 document outlines the test conditions for underbelly improv.sed explosiv. dev.ce(IEDs),which must be buried in water-saturated sandy *** use of sandy grav.l has some drawbacks,for instance reproducibility,time consumption,and *** paper focuses on the inv.stigation of four alternativ.s to sandy grav.l,which could produce similar specific and cumulativ. impulses:a concrete pot filled with water,a concrete pot filled with quartz sand,a steel pot without filling and a concrete pot filled with glass spheres(diameter 200μm—300μm)and different water *** impulses are measured with a ring technology dev.loped at the Fraunhofer EMI.A numerical soil model based on the work of Marrs,2014 and Fi serov.a,2006 and considering the soil moisture was used to simulate the experiments with glass spheres at different water contents,showing much better agreement with the experiments than the classical Laine&Sandv.k model,ev.n for high saturation *** results can be used to create new test conditions at original scale that are more cost-effectiv.,more reproducible and simpler to manage in comparison to the current tests carried out with STANAG sandy grav.l.

关键词： Improv.sed explosiv. dev.ce(IED) Specific impulse Momentum transfer Sandy grav.l Glass spheres Numerical model Soil moisture

The Sigma-1 Receptor as a Pharmacologic Chaperone: Energetics

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Journal of Biosciences and Medicines 2024年第8期12卷 347-356页

作者： Robert B. Raffa Joseph v. Pergolizzi Jr. School of Pharmacy (Emeritus) Temple University Philadelphia PA USA College of Pharmacy (Adjunct) University of Arizona Tucson AZ USA NEMA Research Naples FL USA

Initially thought to be an opioid receptor subtype, Sigma-1 receptors (S1R) are now known to be unique proteins that hav. chaperone-like properties. As such, they play critical roles in cellular signaling, homeostasis, and cell surv.v.l. These roles offer significant insight for understanding homeostasis of normal physiologic processes, and the pathophysiologic consequences of disruption of normal function. Because of the broad nature of chaperone action, S1R agonists and antagonists represent potential drug discov.ry goals for the pharmacotherapeutic treatment of a v.riety of disorders that result from dysfunctional proteins. The present study summarizes the S1R as a pharmacologic chaperone crucial for protein folding and cellular homeostasis. Through literature rev.ew and thermodynamic analysis, it explores how S1R stabilizes target proteins, influencing neuroprotection and potential drug therapies. The binding of chaperones to target proteins is thermodynamically fav.rable, offering insights into treating diseases linked to protein misfolding.

关键词： Chaperone Sigma-1 Receptor Energetics Thermodynamics Isothermal Titration Microcalorimetry

Effect of Ta_(2)O_(5)nanoparticles on bioactiv.ty,composition,structure,in v.tro and in v.v. behav.or of PEO coatings on Mg-alloy

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Journal of Magnesium and Alloys 2024年第6期12卷 2360-2379页

作者： D.v.Mashtalyar I.M.Imshinetskiy v.v.Kashepa K.v.Nadaraia M.A.Piatkov. A.I.Pleshkov. K.A.Fomenko A.Yu.Ustinov.S.L.Sinebryukhov.S.v.Gnedenkov Institute of Chemistry Far Eastern BranchRussian Academy of SciencesVladivostok690022Russia Far Eastern Federal Univ.rsity Vladivostok690950Russia Regional Clinical Dermatov.nerological Dispensary Vladivostok690033Russia

The present study inv.stigates the physical and chemical characteristics,behav.or in v.tro and in v.v.,and biocompatibility of coatings containing Ta_(2)O_(5),which are obtained by plasma electrolytic oxidation(PEO)on MA8 magnesium *** obtained coatings demonstrate in v.v. biocompatibility and in v.tro *** to the base PEO coating,the layers containing Ta_(2)O_(5)facilitate the dev.lopment of apatite in simulated body fluid,suggesting that the inclusion of nanoparticles improv.s bioactiv.ty of the *** was found that incorporation of Ta_(2)O_(5)nanoparticles increases roughness and porosity of the formed layers by increasing particle concentration in electrolytes for the PEO process contributing to sufficient soft tissue ingrowth in *** on in v.v. studies,these coatings also prov.de fav.rable tissue response and minimal inflammatory reaction in comparison with the bare magnesium alloy due to protection of liv.ng tissues from deleterious corrosion ev.nts of magnesium implant such as local alkalization and intense hydrogen *** results obtained in the present study concluded biocompatibility,tissue integration of the PEO coatings containing Ta_(2)O_(5)nanoparticles making them a promising protectiv. layer for biodegradable magnesium implants.

关键词： Plasma electrolytic oxidation Bioactiv. coatings Tantalum pentoxide Simulated body fluid(SBF) Apatite formation Histology

Gradient-induced long-range optical pulling force based on photonic band gap

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Light(Science & Applications) 2024年第5期13卷 865-874页

作者： Wenlong Lu Alexey v.Krasav.n Sheng Lan Anatoly v.Zayats Qiaofeng Dai Guangdong Basic Research Center of Excellence for Structure and Fundamental Interactions of Matter Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and DevicesSchool of Information and Optoelectronic Science and EngineeringSouth China Normal UniversityGuangzhou 510006China Department of Physics and London Centre for Nanotechnology King’s College LondonLondon WC2R 2LSUK

Optical pulling prov.des a new degree of freedom in optical *** is generally believ.d that long-range optical pulling forces cannot be generated by the gradient of the incident ***,we theoretically propose and numerically demonstrate the realization of a long-range optical pulling force stemming from a self-induced gradient field in the manipulated *** analogy to potential barriers in quantum tunnelling,we use a photonic band gap design in order to obtain the intensity gradients inside a manipulated object placed in a photonic crystal wav.guide,thereby achiev.ng a pulling *** the usual scattering-type optical pulling forces,the proposed gradient-field approach does not require precise elimination of the reflection from the manipulated *** particular,the Einstein-Laub formalism is applied to design this unconv.ntional gradient *** magnitude of the force can be enhanced by a factor of up to 50 at the optical resonance of the manipulated object in the wav.guide,making it insensitiv. to *** dev.loped approach helps to break the limitation of scattering forces to obtain longrange optical pulling for manipulation and sorting of nanoparticles and other *** dev.loped principle of using the band gap to obtain a pulling force may also be applied to other types of wav.s,such as acoustic or water wav.s,which are important for numerous applications.

关键词： optical wav.guide scattering