Chimica Techno Acta最新文献_第3页

Interaction of silica with polystyrene: mechanical properties, polymer/filler adhesion and failure behavior 二氧化硅与聚苯乙烯的相互作用：机械特性、聚合物/填料粘附性和失效行为

Chimica Techno Acta Pub Date : 2024-02-01 DOI: 10.15826/chimtech.2024.11.1.05

Selvin P. Thomas

引用次数: 0

Development of A. solani β-tubulin models and comparison of docking results for benzo[d]azoles derivatives as potential antifungal agents 开发 A. solani β-管蛋白模型并比较苯并[d]唑衍生物作为潜在抗真菌剂的对接结果

Chimica Techno Acta Pub Date : 2024-01-30 DOI: 10.15826/chimtech.2024.11.1.04

K. Obydennov, T. Kalinina, T. Glukhareva, V. Bakulev

{"title":"Development of A. solani β-tubulin models and comparison of docking results for benzo[d]azoles derivatives as potential antifungal agents","authors":"K. Obydennov, T. Kalinina, T. Glukhareva, V. Bakulev","doi":"10.15826/chimtech.2024.11.1.04","DOIUrl":"https://doi.org/10.15826/chimtech.2024.11.1.04","url":null,"abstract":"An approach to developing a docking protocol using free software such as KNIME, DataWarrior, AutoDock Vina, AutoDockTools, OpenBabel and the SWISS-MODEL service was described. In particular, the process of generating possible isomeric structures using KNIME chemoinformatics libraries is described. A library of benzo[d]azoles containing 145 compounds with homologous models of Alternaria solani β-tubulin obtained in two ways: using the commercial Prime program and the free SWISS-MODEL service, the comparison of results was shown. Despite the less preorganization of the binding cavity of the homologous model obtained using SWISS-MODEL, the correlation of the results between the two methods were observed. The correlation coefficients were as follows: Pearson was 0.65, Spearman was 0.62. According to the docking results, 99% of the studied 2-aminobenzo[d]azoles derivatives showed a docking score of no more than –7, which indicates that these compounds are promising for studying the fungicidal activity, in particular against A. solani. Without taking into account pharmacokinetic characteristics, benzo[d]imidazole derivatives containing a sulfanilamidine substituent at the 2-amino group and thioacetyl derivatives of 2-aminobenzo[d]imidazole are of particular interest in the search for new antitubulin fungicides.","PeriodicalId":9964,"journal":{"name":"Chimica Techno Acta","volume":"145 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140485530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fast-activating reserve power sources: is lead dead indeed? 快速激活的后备电源：铅真的死了吗？

Chimica Techno Acta Pub Date : 2024-01-25 DOI: 10.15826/chimtech.2024.11.1.03

P. A. Shcheglov, Dmitry A. Samsonov, A. B. Pavlenkov, T. Kulova, Alexey Yu. Rychagov, A. Skundin, Evgeniya Yu. Postnova

{"title":"Fast-activating reserve power sources: is lead dead indeed?","authors":"P. A. Shcheglov, Dmitry A. Samsonov, A. B. Pavlenkov, T. Kulova, Alexey Yu. Rychagov, A. Skundin, Evgeniya Yu. Postnova","doi":"10.15826/chimtech.2024.11.1.03","DOIUrl":"https://doi.org/10.15826/chimtech.2024.11.1.03","url":null,"abstract":"The purpose of this research is to improve the performance and reduce the activation time of reserve power sources based on lead-acid systems at lower temperatures, down to –50 °C. Physico-chemical factors affecting the activation speed of reserve power sources based on Pb–HClO4–PbO2 and Zn–HClO4–PbO2 systems are investigated using chronopotentiometry, scanning electron microscopy, and standard contact porosimetry. Two approaches to the improvement of the low-temperature performance of power sources are used. The first one is based on the substitution of lead as anodic material with zinc. This allows the increase in discharge voltage and simultaneous decrease in activation time, but brings about the instability of discharge characteristics and, finally, deteriorates the reliability of power sources. The second approach is based on the use of PbO2 cathode material with enhanced nanoporosity. The chronopotentiometric method in galvanostatic mode is applied to the quality estimation of cathodes. The criterion of applicability of cathodes for reserve power sources consists in the low discharge overvoltage (0.1–0.2 V). Efficient performance of reserve power sources possessing the stable discharge voltage (1.5–1.8 V per cell) and the unprecedentedly short activation time (under 30 ms) even at lower temperatures (down to –50 °C) is achieved. The results are verified by fabrication and testing of pilot batches of miniaturized reserve power sources having microcells’ volume of 0.02 ml. The second approach to the improvement of power sources is transferred into the industrial production.","PeriodicalId":9964,"journal":{"name":"Chimica Techno Acta","volume":"345 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140495281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Oxygen-ion and proton conductivity in the Ba3InGa2O7.5 complex oxide with incomplete oxygen sublattice 具有不完整氧亚晶格的 Ba3InGa2O7.5 复合氧化物中的氧离子和质子传导性

Chimica Techno Acta Pub Date : 2024-01-17 DOI: 10.15826/chimtech.2024.11.1.02

Nadezhda Kochetova, Veronika Cherepanova, Alyona Pikalova, Artem Gilev

引用次数: 0

Improvement of biocompatibility of high molecular weight poly-3-hydroxybutyrate by blending with its functionalized oligomers 通过与功能化低聚物共混改善高分子量聚-3-羟基丁酸酯的生物相容性

Chimica Techno Acta Pub Date : 2024-01-16 DOI: 10.15826/chimtech.2024.11.1.01

Anatoly Boyandin, L. M. Dvoinina, A. Sukovatyi, A. A. Sukhanova, N. Ertiletskaya

引用次数: 0

Conjugates of 8-[2,2’-bipyridinyl]coumarins as potential chemosensors for Al3+, Cu2+, Cd2+, Zn2+ ions: synthesis and photophysical properties 作为 Al3+、Cu2+、Cd2+、Zn2+ 离子潜在化学传感器的 8-[2,2'-联吡啶基]香豆素共轭物：合成与光物理性质

Chimica Techno Acta Pub Date : 2023-12-28 DOI: 10.15826/chimtech.2023.10.4.17

A. Sharapov, R. Fatykhov, I. Khalymbadzha, D. Kopchuk, I. Nikonov, Anastasiya P. Potapova, Y. Shtaitz, Pavel A. Slepukhin

{"title":"Conjugates of 8-[2,2’-bipyridinyl]coumarins as potential chemosensors for Al3+, Cu2+, Cd2+, Zn2+ ions: synthesis and photophysical properties","authors":"A. Sharapov, R. Fatykhov, I. Khalymbadzha, D. Kopchuk, I. Nikonov, Anastasiya P. Potapova, Y. Shtaitz, Pavel A. Slepukhin","doi":"10.15826/chimtech.2023.10.4.17","DOIUrl":"https://doi.org/10.15826/chimtech.2023.10.4.17","url":null,"abstract":"In this work, we report the synthesis of novel coumarin-bipyridine conjugates using a sequence of C–C coupling reaction between 5,7-dimethoxycoumarins and 3-pyridyl-6-aryl-1,2,4-triazines followed by the Boger reaction with norbornandiene to obtain 8-[2,2'-bipyridyl]-5,7-dimethoxycoumarins. Photophysical properties were investigated for the obtained series of 8-[2,2'-bipyridyl]-5,7-dimethoxycoumarins: absorption and emission wavelength maxima are in the region of 212–296 and 401–410 nm, respectively; Stokes shifts are up to 116 nm, and fluorescence quantum yields are up to 15.0%. It was found that titrating the conjugates with Al3+, Zn2+, and Cd2+ ions results in an increase in the intensity of the emission maxima of the complexes, while the opposite effect was observed in the case of titration with Cu2+ ions. These findings suggest that the studied compounds may be considered as promising chemosensing materials. Finally, a positive solvatochromism of 8-[2,2'-bipyridyl]coumarins and their metal complexes was established. The experimental data are supported by mathematical calculations according to the Lippert-Mataga equation and Kosower diagram.","PeriodicalId":9964,"journal":{"name":"Chimica Techno Acta","volume":"301 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139152429","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Anodic dissolution of gallium in alkali metal chloride melts 镓在碱金属氯化物熔体中的阳极溶解

Chimica Techno Acta Pub Date : 2023-12-28 DOI: 10.15826/chimtech.2023.10.4.16

O. Tokarev, V. Volkovich

引用次数: 0

Combination of fluorescent and spin labels: a powerful method for the optimization of hydrophilic membranes for the separation of oil-in-water emulsions 荧光标签与自旋标签的结合：优化亲水膜分离水包油型乳液的有效方法

Chimica Techno Acta Pub Date : 2023-12-15 DOI: 10.15826/chimtech.2023.10.4.15

Rita S. Alqubelat, Alena D. Kuznetsova, Denis O. Antonov, Maxim A. Mironov

引用次数: 0

Chemical stability aspects of BaCe0.7–xFexZr0.2Y0.1O3–δ mixed ionic-electronic conductors as promising electrodes for protonic ceramic fuel cells 作为质子陶瓷燃料电池理想电极的 BaCe0.7-xFexZr0.2Y0.1O3-δ 混合离子电子导体的化学稳定性问题

Chimica Techno Acta Pub Date : 2023-12-08 DOI: 10.15826/chimtech.2023.10.4.14

L. Tarutina, Inna A. Starostina, Gennady Vdovin, Svetlana Pershina, Emma Vovkotrub, Anna Murashkina

{"title":"Chemical stability aspects of BaCe0.7–xFexZr0.2Y0.1O3–δ mixed ionic-electronic conductors as promising electrodes for protonic ceramic fuel cells","authors":"L. Tarutina, Inna A. Starostina, Gennady Vdovin, Svetlana Pershina, Emma Vovkotrub, Anna Murashkina","doi":"10.15826/chimtech.2023.10.4.14","DOIUrl":"https://doi.org/10.15826/chimtech.2023.10.4.14","url":null,"abstract":"Mixed ion-electron conductors (MIECs) are promising materials for air electrodes for protonic ceramic fuel cells (PCFCs) or oxygen permeation membranes. In this work, various aspects of the chemical stability of Co-free MIEC materials, BaCe0.7–xFexZr0.2Y0.1O3–δ, were studied, including their interaction with another functional material (BaCe0.5Zr0.3Y0.1Yb0.1O3–δ-based proton-conducting electrolyte) and gas components (H2O, CO2, and H2). Chemical compatibility studies indicate no visible chemical interaction between the electrode and electrolyte materials even at 1200 °C, which is significantly higher than the operating temperatures (600–800 °C) of PCFCs. The treatments of BaCe0.7–xFexZr0.2Y0.1O3–δ in different atmospheres at 1100 °C, according to the XRD, SEM, IR and Raman spectroscopy data, resulted in the formation of impurity phases. However, their extremely small amounts suggest that they may not form at the operating temperatures. Thus, it can be assumed that the studied materials can be good candidates for various electrochemical applications.","PeriodicalId":9964,"journal":{"name":"Chimica Techno Acta","volume":"55 36","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138588228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Towards controlling the morphology of cobalt loaded nanocomposites in polyol process with polyethylene glycol 在聚乙二醇多元醇工艺中控制钴负载纳米复合材料的形貌

Chimica Techno Acta Pub Date : 2023-12-07 DOI: 10.15826/chimtech.2023.10.4.13

A. Burmatova, A. Khannanov, Liana Zubaidullina, Dmitry Emelianov, Olga Mostovaya, Ivan I. Stoikov, Nikolay Ulakhovich, Marianna Kutyreva

{"title":"Towards controlling the morphology of cobalt loaded nanocomposites in polyol process with polyethylene glycol","authors":"A. Burmatova, A. Khannanov, Liana Zubaidullina, Dmitry Emelianov, Olga Mostovaya, Ivan I. Stoikov, Nikolay Ulakhovich, Marianna Kutyreva","doi":"10.15826/chimtech.2023.10.4.13","DOIUrl":"https://doi.org/10.15826/chimtech.2023.10.4.13","url":null,"abstract":"The polyol process is one of the simple, efficient and productive methods for the synthesis of metal loaded polymer composites. Functional properties of metal-polymer nanocomposites are determined by chemical composition, size and morphology of their particles. Finding effective ways to control the nanoparticle's properties during the polyol process is a crucial task. The effect of molar ratio Mn+/OHPEG on the formation of cobalt loaded metal-polymer nanocomposites during a one-pot two-component polyol process by polyethylene glycol with Mr = 4000 g·mol–1 (PEG) was studied. The PEG-based polyol process and the formation of cobalt nanophase were studied at molar ratios νCo2+/νOH(PEG) = 1:1, 1:10, 1:100 and 1:500 using UV-Vis, diffuse reflectance IR and ATR FT-IR spectroscopy, nanoparticle tracking analysis (NTA), dynamic light scattering (DLS). It was found that PEG can act as a reducing agent and stabilizing matrix for the cobalt nanophase at a ratio higher than Mn+/OHPEG= 1:10. The composition and morphology of Co/PEG nanocomposites were determined by XRD and TEM methods. Two types of spheroid particles with average diameters of 88±55 nm / 8±4 nm and 12±3 nm / 3±1 nm, respectively, represent Co/PEG nanocomposites 1:500 and 1:100. Scaly structures with a diameter of 15±5 nm are formed at a molar ratio of νCo2+/νOH(PEG) = 1:10. An increase in the Co2+ content in the PEG-based polyol process leads to the immobilized cobalt nanophase Co3O4 (1:500), Co0/CoO (1:100), CoO (1:10) in PEG. Co/PEG nanocomposites are hemocompatible. The HC50value depends on the composition and morphology of the nanoparticles.","PeriodicalId":9964,"journal":{"name":"Chimica Techno Acta","volume":"13 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138592805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0