Russian Journal of Physical Chemistry B最新文献_第8页

Improvement of the Morphophysiological Parameters of Pepper after the Presowing Treatment of Seeds with Zinc Nanoparticles 用纳米锌颗粒对辣椒种子进行播前处理后对其形态生理参数的改善

IF 1.4 4区化学

Russian Journal of Physical Chemistry B Pub Date : 2024-05-29 DOI: 10.1134/S1990793124020295

I. P. Olkhovskaya, I. I. Krokhmal, N. N. Glushchenko

{"title":"Improvement of the Morphophysiological Parameters of Pepper after the Presowing Treatment of Seeds with Zinc Nanoparticles","authors":"I. P. Olkhovskaya, I. I. Krokhmal, N. N. Glushchenko","doi":"10.1134/S1990793124020295","DOIUrl":"10.1134/S1990793124020295","url":null,"abstract":"Advanced nanotechnologies allow synthesizing nanoparticles (NPs) with the given physical and chemical properties providing an opportunity to study the effects and mechanisms of the influence of NPs on plants in order to improve their productivity. In this study, Zn NPs introduced in the polymer coating are used as a preparation for the presowing treatment of pepper seeds. It is found that Zn NPs in concentrations of 10–5 and 10–6% in the composition of polymers accelerated plant growth and led to a significant increase in the number of leaves and buds, while the root mass volume increased on average by 10–30% compared to the control plants. After seed treatment with Zn NPs with a concentration of 10–6%, the proline content in plant leaves increases by 58% (p ≤ 0.05); and the protein content, by 20% (p ≤ 0.05). The treatment of seeds with Zn NPs at a concentration of 10–5% leads to the sugar content increasing by 36% (p ≤ 0.05), and the chlorophyll content, by 52% (p ≤ 0.05) compared with the control.","PeriodicalId":768,"journal":{"name":"Russian Journal of Physical Chemistry B","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141170813","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

Ignition of Coal Microparticles by Laser Pulses of the Second Harmonic of a Neodymium Laser in the Q-Switched Regime 在 Q 开关状态下用钕激光器二次谐波激光脉冲点燃煤微粒

IF 1.4 4区化学

Russian Journal of Physical Chemistry B Pub Date : 2024-05-29 DOI: 10.1134/S1990793124020027

B. P. Aduev, D. R. Nurmukhametov, Ya. V. Kraft, Z. R. Ismagilov

{"title":"Ignition of Coal Microparticles by Laser Pulses of the Second Harmonic of a Neodymium Laser in the Q-Switched Regime","authors":"B. P. Aduev, D. R. Nurmukhametov, Ya. V. Kraft, Z. R. Ismagilov","doi":"10.1134/S1990793124020027","DOIUrl":"10.1134/S1990793124020027","url":null,"abstract":"The ignition of pelletized samples of hard coals of the long-flame gas (LG), gas (G), fat (F), coke (C) grades with particle sizes ≤ 63 μm by laser pulses (λ = 532 nm, τi = 10 ns) is studied. When the critical radiation energy density (H_{{{text{cr}}}}^{{(1)}}), specific for each grade of coal, is exceeded, the optical breakdown occurs and a dense plasma with a continuous emission spectrum is formed. As the plasma expands and rarefies, the spectra show the emission of carbon ions CII, excited nitrogen atoms N, excited carbon molecules C2, and carbon monoxide CO. The plasma glow’s intensity peaks at the end of the laser pulse, and the glow relaxation time is ~1 μs. The plasma glow’s amplitude increases nonlinearly with the increasing energy density of laser pulses. At a radiation energy density of H ≥ (H_{{{text{cr}}}}^{{(2)}}), specific for each grade of coal, thermochemical reactions are initiated in the volume of microparticles and coal particles are ignited in the submillisecond time interval.","PeriodicalId":768,"journal":{"name":"Russian Journal of Physical Chemistry B","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141167302","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

The Impact of Water on Polylactide–Polybutylene Adipate Terephthalate Blends 水对聚乳酸-聚己二酸丁二醇对苯二甲酸酯混合物的影响

IF 1.4 4区化学

Russian Journal of Physical Chemistry B Pub Date : 2024-05-29 DOI: 10.1134/S1990793124020167

L. D. Selezneva, M. V. Podzorova, Y. V. Tertyshnaya, R. R. Romanov, A. A. Popov

引用次数: 0

The Structure of Tetranuclear Zirconium Pivalate Zr4O2[(CH3)3CCO2]12 According to X-Ray Diffraction Analysis and Quantum Chemical Calculations 根据 X 射线衍射分析和量子化学计算得出的四核特戊酸锆 Zr4O2[(CH3)3CCO2]12 的结构

IF 1.4 4区化学

Russian Journal of Physical Chemistry B Pub Date : 2024-05-29 DOI: 10.1134/S1990793124020258

V. D. Makhaev, L. A. Petrova, G. V. Shilov, K. V. Bozhenko, A. N. Utenyshev, S. M. Aldoshin

{"title":"The Structure of Tetranuclear Zirconium Pivalate Zr4O2[(CH3)3CCO2]12 According to X-Ray Diffraction Analysis and Quantum Chemical Calculations","authors":"V. D. Makhaev, L. A. Petrova, G. V. Shilov, K. V. Bozhenko, A. N. Utenyshev, S. M. Aldoshin","doi":"10.1134/S1990793124020258","DOIUrl":"10.1134/S1990793124020258","url":null,"abstract":"The crystal and molecular structure of a polynuclear pivalate complex obtained by the interaction of ZrCl4 with pivalic acid is determined by X-ray diffraction analysis. The compound C71H124O28Zr4 crystallizes in a monoclinic crystal system. The crystal structure is refined in the nonstandard space group I2. The asymmetric part of the structure includes three Zr atoms, six pivalate ligands, and a bridging µ3-O oxygen atom, as well as disordered crystallization molecules of pivalic acid with an occupancy of 50% and benzene with an occupancy of 50%. The zirconium complex molecule is a tetranuclear cluster that contains three types of Zr atoms that differ in the ligand environment. A comparison of the results of the quantum chemical calculations of the model reaction of ZrCl4 with acetic acid with the published data on reactions of ZrCl4 with aliphatic acids shows the possibility of the formation of both mononuclear Zr(RCO2)4 and polynuclear clusters in this reaction, which is a new route for obtaining polynuclear zirconium clusters. The structure of the clusters formed depends on the steric properties of carboxylate ligands.","PeriodicalId":768,"journal":{"name":"Russian Journal of Physical Chemistry B","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141173324","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

Kinetics of the Thermal Decomposition of Methyl Derivatives of 7H-Difurazanofuxanoazepine and 7H-Tryfurasanoazepine 7H-Difurazanofuxanoazepine 和 7H-Tryfurasanoazepine 甲基衍生物的热分解动力学

IF 1.4 4区化学

Russian Journal of Physical Chemistry B Pub Date : 2024-05-29 DOI: 10.1134/S1990793124020210

A. I. Kazakov, D. B. Lempert, A. V. Nabatova, E. L. Ignatieva, D. V. Dashko, V. V. Raznoschikov, L. S. Yanovskiy

引用次数: 0

Study of Patterns and Mechanisms of Combustion of a Powdered and Granulated Ti–C–B System 粉末和颗粒状 Ti-C-B 系统的燃烧模式和机理研究

IF 1.4 4区化学

Russian Journal of Physical Chemistry B Pub Date : 2024-05-29 DOI: 10.1134/S1990793124020337

D. S. Vasilyev, R. A. Kochetkov, B. S. Seplyarskii

{"title":"Study of Patterns and Mechanisms of Combustion of a Powdered and Granulated Ti–C–B System","authors":"D. S. Vasilyev, R. A. Kochetkov, B. S. Seplyarskii","doi":"10.1134/S1990793124020337","DOIUrl":"10.1134/S1990793124020337","url":null,"abstract":"Experimental studies of the combustion patterns of the ternary system (100 – x)(Ti + C) – x(Ti + 2B) of bulk density in the powder and granular form used for the synthesis of TiC–TiB2 composite ceramics are carried out. The study shows that the dependence of the powder mixture’s combustion rate on the Ti + 2B content has a non-monotonic character, which is associated with the influence of the impurity gas (IG) release on the combustion process. By removing the influence of the IG by granulation, a monotonic dependence with two characteristic sections is obtained. For the granulated mixture, an increase in the Ti + 2B content to >60 wt % leads to a change from the conductive combustion mode to the convective one, accompanied by a sharp increase in the combustion rate. For the conductive combustion mode, the combustion rate of the substance inside the granule and the combustion transfer time from granule-to-granule are determined, which allows us to estimate the inhibitory effect of the IG release on the combustion rate of powder mixtures of different compositions. For the convective combustion mode, it is shown that a decrease in the content of the gasifying additive in the mixture (granulation with ethyl alcohol) leads to an unexpected result: an increase in the combustion rate of the mixture. For compositions with (Ti + 2B) > 60 wt %, the combustion rate with the counterfiltration of IGs is determined for the first time, which makes it possible to estimate the front rate increase according to the filtration combustion theory. According to the X-ray phase analysis (XPA), the combustion products of all compositions contain only two main phases: TiC and TiB2","PeriodicalId":768,"journal":{"name":"Russian Journal of Physical Chemistry B","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141167303","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

Influence of Conditions for Obtaining Polylactide-Based Materials on Their Physical-Mechanical and Rheological Characteristics 获得聚乳酸基材料的条件对其物理机械和流变特性的影响

IF 1.4 4区化学

Russian Journal of Physical Chemistry B Pub Date : 2024-05-29 DOI: 10.1134/S1990793124020040

E. R. Bakirova, R. Y. Lazdin, A. S. Shurshina, V. V. Chernova, E. M. Zakharova, E. I. Kulish

{"title":"Influence of Conditions for Obtaining Polylactide-Based Materials on Their Physical-Mechanical and Rheological Characteristics","authors":"E. R. Bakirova, R. Y. Lazdin, A. S. Shurshina, V. V. Chernova, E. M. Zakharova, E. I. Kulish","doi":"10.1134/S1990793124020040","DOIUrl":"10.1134/S1990793124020040","url":null,"abstract":"This paper studies the influence of the conditions for obtaining materials based on the synthetic polymer polylactide on their physical-mechanical and rheological characteristics. These materials are promising for creating temporary biodegradable polymer implants to maintain the mechanical properties of broken bones during the healing period. They are designed to replace the titanium fixators currently used for these purposes, which is due not only to the need for repeated surgery to extract them but also to the fact that the strength and modulus of elasticity of titanium fixators exceed the values of bone strength indicators by an order of magnitude, which can cause the phenomenon of bone resorption and a decrease in its strength. It is established that with an increase in temperature in the plasticization and pressing zone, as well as with an increase in pressure in the press, there is a natural decrease in the viscosity of the polylactide melt, as well as the values of the elastic modulus and breaking stress of solid samples. Varying the cooling rate of the material during the pressing process affects the degree of its crystallinity. At the same time, the lower the cooling rate the greater the degree of crystallinity of the polylactide and the greater the values of the elastic modulus and breaking stress.","PeriodicalId":768,"journal":{"name":"Russian Journal of Physical Chemistry B","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141170636","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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Dynamics of the Degradation of Polylactide-Natural Rubber Films under the Influence of UV-Irradiation 紫外线照射下聚乳酸-天然橡胶薄膜的降解动力学

IF 1.4 4区化学

Russian Journal of Physical Chemistry B Pub Date : 2024-05-29 DOI: 10.1134/S1990793124020143

M. V. Podzorova, Yu. V. Tertyshnaya

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Dependence of the Decomposition Rate of Furoxanes on the Polarity of the Solvent 呋喃类化合物的分解率与溶剂极性的关系

IF 1.4 4区化学

Russian Journal of Physical Chemistry B Pub Date : 2024-05-29 DOI: 10.1134/S1990793124020283

G. M. Nazin, A. I. Kazakov, A. V. Nabatova, L. L. Fershtat, A. A. Larin

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Study of the Potential Energy Surface of Reactions in a System Containing I-Propyl and N-Propyl Radicals 含 I-丙基和 N-丙基自由基体系中反应的势能面研究

IF 1.4 4区化学

Russian Journal of Physical Chemistry B Pub Date : 2024-05-29 DOI: 10.1134/S1990793124020209

A. H. Davtyan, Z. H. Manukyan, S. D. Arsentev, L. A. Tavadyan, V. S. Arutyunov

引用次数: 0