Journal of Applied Spectroscopy最新文献_第6页

Spectral-Kinetic Characteristics of the Photoluminescence of AIS/ZnS–PEI Semiconductor Quantum Dots in Aqueous Solutions and Their Application in Clinical Morphology 水溶液中AIS/ ZnS-PEI半导体量子点光致发光的光谱动力学特性及其在临床形态学中的应用

IF 1 4区化学

Journal of Applied Spectroscopy Pub Date : 2025-07-05 DOI: 10.1007/s10812-025-01941-x

I. G. Motevich, E. I. Zenkevich, S. A. Maskevich, A. V. Shulga, N. D. Strekal

{"title":"Spectral-Kinetic Characteristics of the Photoluminescence of AIS/ZnS–PEI Semiconductor Quantum Dots in Aqueous Solutions and Their Application in Clinical Morphology","authors":"I. G. Motevich, E. I. Zenkevich, S. A. Maskevich, A. V. Shulga, N. D. Strekal","doi":"10.1007/s10812-025-01941-x","DOIUrl":"10.1007/s10812-025-01941-x","url":null,"abstract":"A study was carried out on the pH-dependence of the parameters of the time-resolved and steady-state photoluminescence of Ag–In–S2 (AIS) quantum dots with surface-active polyethylenimine (PEI) groups in aqueous solutions. The high sensitivity of the PEI structure to pH in a broad range was shown to affect the mobility of the charge carriers in AIS QDs and, as a consequence, the mechanism of the dipole moment transition in the QDs. Using the Stark model and assuming no electrical field on the ZnS shell comprising the QD surface in environments with neutral pH and in ovarian tissues without pathology, shifts in the solution toward either acidic or basic values cause change in the electrical field in the local environment of the QDs manifested in change in the QD photoluminescence parameters (band maximum position and intensity, average lifetime). AIS-QDs under these conditions can act as a contrast agent in clinical morphology. Using confocal microspectrometry, we found AIS–PEI QDs to be useful not only for visualization but also for screening of ovarian malignancies.","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"92 3","pages":"530 - 537"},"PeriodicalIF":1.0,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144990575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Transparent Thermal Radiation Emitters 透明热辐射发射器

IF 1 4区化学

Journal of Applied Spectroscopy Pub Date : 2025-07-05 DOI: 10.1007/s10812-025-01946-6

V. M. Marchenko

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Prooxidant Sensitizing Properties of Sodium Pyruvate 丙酮酸钠的促氧化增敏特性

IF 1 4区化学

Journal of Applied Spectroscopy Pub Date : 2025-07-05 DOI: 10.1007/s10812-025-01942-w

V. Y. Plavskii, A. I. Tretyakova, L. G. Plavskaya, A. V. Mikulich, T. S. Ananich, O. N. Dudinova

{"title":"Prooxidant Sensitizing Properties of Sodium Pyruvate","authors":"V. Y. Plavskii, A. I. Tretyakova, L. G. Plavskaya, A. V. Mikulich, T. S. Ananich, O. N. Dudinova","doi":"10.1007/s10812-025-01942-w","DOIUrl":"10.1007/s10812-025-01942-w","url":null,"abstract":"Sodium pyruvate is an important biological molecule, which serves as a substrate for several enzymes in the main metabolic pathways of carbohydrates. This is the first report showing that, along with its well-known antioxidant properties, sodium pyruvate also can act as a photosensitizer when exposed to long-wavelength UV radiation (λ = 325 nm) corresponding to its low intensity n → π* absorption band. The sensitizing properties of pyruvate were studied in relation to the lactate dehydrogenase (LDH) enzyme, for which pyruvate serves as a substrate. The pyruvate-sensitized photodecomposition of tryptophan and cystine amino acid residues has been shown to lead to photoinactivation of the enzyme. The photochemical process is inhibited by adding free radical quenchers and antioxidant enzymes to the irradiated LDH-pyruvate mixture as well as by replacing H2O with D2O. The rate of this process is also enhanced by reducing the concentration of dissolved oxygen. A decisive role was proposed for radical processes (type I photochemical reactions) in the pyruvate-sensitized photoinactivation of LDH.","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"92 3","pages":"538 - 546"},"PeriodicalIF":1.0,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144990572","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Variations in the Composition of Rowan Fruit Juice Studied by NMR 核磁共振研究罗文果汁成分的变化

IF 1 4区化学

Journal of Applied Spectroscopy Pub Date : 2025-07-05 DOI: 10.1007/s10812-025-01945-7

E. D. Skakovsky, L. Yu. Tychinskaya, O. A. Molchanova, E. I. Gapankova, V. M. Milov

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Dynamics of Motion of a Dielectric Nanoparticle Along the Interface of Media Under the Influence of the Force of Light Pressure Generated by an Evanescent Field 在倏逝场产生的光压力作用下介电纳米粒子沿介质界面运动的动力学

IF 1 4区化学

Journal of Applied Spectroscopy Pub Date : 2025-07-05 DOI: 10.1007/s10812-025-01939-5

A. Ch. Svistun, E. V. Musafirov, D. V. Guzatov, L. S. Gaida, E. V. Matuk

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Spectrophotometric Determination of Component Concentrations in a Light-Scattering Mixture 光散射混合物中组分浓度的分光光度法测定

IF 1 4区化学

Journal of Applied Spectroscopy Pub Date : 2025-07-05 DOI: 10.1007/s10812-025-01934-w

V. S. Kozlovsky, A. P. Razjivin

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Determination of Kinetic Characteristics of Dissociation of Complexes of Meta-Tetra(Hydroxyphenyl)Chlorin and Dextran-Poly-N-Isopropylacrylamide Copolymer by Fluorescence Spectroscopy 荧光光谱法测定间四（羟基苯基）氯与右旋糖酐-聚n-异丙基丙烯酰胺共聚物配合物解离动力学特征

IF 1 4区化学

Journal of Applied Spectroscopy Pub Date : 2025-07-05 DOI: 10.1007/s10812-025-01943-9

I. V. Kablov, I. E. Kravchenko, T. E. Zorina, V. P. Zorin

{"title":"Determination of Kinetic Characteristics of Dissociation of Complexes of Meta-Tetra(Hydroxyphenyl)Chlorin and Dextran-Poly-N-Isopropylacrylamide Copolymer by Fluorescence Spectroscopy","authors":"I. V. Kablov, I. E. Kravchenko, T. E. Zorina, V. P. Zorin","doi":"10.1007/s10812-025-01943-9","DOIUrl":"10.1007/s10812-025-01943-9","url":null,"abstract":"The ability of the thermosensitive copolymer dextran-poly-N-isopropylacrylamide (D-PNIPAM) to bind and release the photosensitizer (PS) meta-tetra(hydroxyphenyl)chlorin (mTHPC) was investigated using fluorescence spectroscopy techniques. It was shown that the efficiency of the copolymer to absorb mTHPC molecules depended on its phase state: mTHPC was efficiently adsorbed by D-PNIPAM (copolymer in globular conformation) at temperatures above 34–35°C, but the PS was practically not adsorbed on D-PNIPAM (copolymer in coil conformation) at temperatures below 34–35°C. The presence of additional structural rearrangements in the globule of D-PNIPAM under the action of high temperatures (>45°C) was shown using dynamic light scattering. The mTHPC dissociation rates from complexes with D-PNIPAM formed at 37–60°C were compared. The mTHPC release rate constants from the polymer globule were calculated. It was shown that complexation of mTHPC with D-PNIPAM at high temperatures (45–60°C) almost doubled the release rate of PS molecules from the copolymer globule at physiological temperatures as compared to similar complexes formed at 37–40°C. The time required for thermally induced structural rearrangements in D-PNIPAM was estimated. The globule-coil transition in the D-PNIPAM molecule caused by a temperature decrease below 34–35°C took less than a minute, while the reversibility of conformational changes in the copolymer globule when the medium temperature rose above 45°C required ~150 min. The results suggested that thermally dependent conformational rearrangements in the D-PNIPAM copolymer could be used for efficient regulation of the PS release rate in cellular and tissue systems.","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"92 3","pages":"547 - 554"},"PeriodicalIF":1.0,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144990576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Spectral-Luminescent and Optical Properties of Antimony-Doped Yttrium–Alumoborate Glasses 掺锑铝酸钇玻璃的光谱发光和光学性质

IF 1 4区化学

Journal of Applied Spectroscopy Pub Date : 2025-07-05 DOI: 10.1007/s10812-025-01938-6

G. E. Malashkevich, V. V. Kouhar, A. A. Romanenka, A. A. Sukhodola, I. V. Prusova, N. V. Golubev, M. Z. Ziyatdinova, E. S. Ignat’eva, V. N. Sigaev

引用次数: 0

Electronic Structure and Optical Properties of the Isoelectronic Series of Si–AlP–MgS–NaCl Crystals Si-AlP-MgS-NaCl等电子系列晶体的电子结构和光学性质

IF 1 4区化学

Journal of Applied Spectroscopy Pub Date : 2025-07-05 DOI: 10.1007/s10812-025-01935-9

A. I. Kalugin, D. A. Perevoshchikov, E. A. Antonov

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Effect of Internal Rotational Diffusion of Fluorescent Labels on the Temporal Kinetics of the Orientation Factor of Förster Resonance Energy Transfer 荧光标记内部旋转扩散对Förster共振能量转移取向因子时间动力学的影响

IF 1 4区化学

Journal of Applied Spectroscopy Pub Date : 2025-07-05 DOI: 10.1007/s10812-025-01933-x

A. P. Blokhin, S. A. Tikhomirov, Phung Viet Tiep, Pham Hong Minh

{"title":"Effect of Internal Rotational Diffusion of Fluorescent Labels on the Temporal Kinetics of the Orientation Factor of Förster Resonance Energy Transfer","authors":"A. P. Blokhin, S. A. Tikhomirov, Phung Viet Tiep, Pham Hong Minh","doi":"10.1007/s10812-025-01933-x","DOIUrl":"10.1007/s10812-025-01933-x","url":null,"abstract":"A generalized method has been developed to describe the time dependences of the orientation factor for Förster resonance dipole–dipole energy transfer (FRET) between fluorescent labels associated with biomolecules taking into account internal rotational mobility. The method consists of representing the orientation factor in terms of tensor orientational correlation functions for vectors of transition dipole moments of donor and acceptor, which makes it possible to use well-known proven models of orientational relaxation to describe rotational diffusion. The time dependences of the probability of the energy-transfer process on the opening angles of internal rotational diffusion cones, the orientation of these cones on the surface of the biomolecule, and the rotational diffusion rates were calculated. The ranges of angular parameters at which the temporal kinetics had the most dramatic changes during a transition from the initial stationary values to the dynamic limit were determined. It has been demonstrated that the internal rotational diffusion of the donor and acceptor under certain conditions can both decrease and increase the probability of energy transfer over time.","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"92 3","pages":"467 - 476"},"PeriodicalIF":1.0,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144990570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0