Acta Chimica Slovaca最新文献

Colour masterbatches and their use in polylactic acid fibres dyeing 色母粒及其在聚乳酸纤维染色中的应用

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Acta Chimica Slovaca Pub Date : 2023-01-01 DOI: 10.2478/acs-2023-0006

Agáta Hudecová, M. Hricová, M. Petkova, R. Plavec, Z. Tomčíková, A. Ujhelyiová

引用次数: 0

Thermal- and light-induced SCO effect in Fe(II) complexes and coordination polymers Fe（II）配合物和配位聚合物中的光和热诱导SCO效应

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Acta Chimica Slovaca Pub Date : 2023-01-01 DOI: 10.2478/acs-2023-0003

Alexandra Šagátová, Barbora Brachňaková, Ivan Šalitroš

{"title":"Thermal- and light-induced SCO effect in Fe(II) complexes and coordination polymers","authors":"Alexandra Šagátová, Barbora Brachňaková, Ivan Šalitroš","doi":"10.2478/acs-2023-0003","DOIUrl":"https://doi.org/10.2478/acs-2023-0003","url":null,"abstract":"Abstract The review presents several families of spin crossover (SCO) active Fe(II) coordination compounds with photoactive N-donor heterocyclic ligands, in which the photoinduced structural changes can activate reversible change of spin state and thus control magnetic properties under isothermal conditions. Detailed description of structural, spectral, and magnetic behavior for selected examples of photoisomerizable coordination compounds are provided. From the application point of view, light is an excellent tool to control SCO properties. The first and best known approach called Light Induced Excited Spin State Trapping (LIESST) has a significant technological limitation due to low temperatures (< 120 K) required for the trapping and existence of photoexcited metastable states. The second and more elegant approach known as Ligand-Driven Light-Induced Spin Crossover (LD-LISC) seems to be a very suitable strategy utilizing light-induced structural changes to control the spin. Isomerization of photoswitchable groups, such as azobenzenes or stilbenes, can cause reversible transformation between two isomeric forms after exposition to selective wavelengths at ambient temperature. A very recent third approach, the Guest-Driven Light-Induced Spin Crossover (GD-LISC) effect employing the photoisomerizable guest molecules to control the spin state has also been introduced.","PeriodicalId":7088,"journal":{"name":"Acta Chimica Slovaca","volume":"49 11","pages":"22 - 40"},"PeriodicalIF":0.8,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41293923","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

Stability of ferrate during long-term storage 高铁酸盐长期贮存的稳定性

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Acta Chimica Slovaca Pub Date : 2023-01-01 DOI: 10.2478/acs-2023-0004

Michaela Benköová, E. Mališová, P. Peciar, Adam Guštafík, J. Híveš

引用次数: 0

Utilization of Opuntia as an alternative ingredient in value added bread and pasta products 仙人掌作为附加值面包和意大利面产品的替代成分的利用

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Acta Chimica Slovaca Pub Date : 2023-01-01 DOI: 10.2478/acs-2023-0005

Tatiana Holkovičová, Z. Kohajdová, Michaela Lauková, Lucia Minarovičová

引用次数: 0

Extraction of bioactive coumarins from lime peel as sample pretreatment before chromatographic analysis 从酸橙皮中提取生物活性香豆素作为样品色谱前预处理

Acta Chimica Slovaca Pub Date : 2023-01-01 DOI: 10.2478/acs-2023-0007

Lucia Krasňanská, Katarína Hroboňová, Andrea Špačková

{"title":"Extraction of bioactive coumarins from lime peel as sample pretreatment before chromatographic analysis","authors":"Lucia Krasňanská, Katarína Hroboňová, Andrea Špačková","doi":"10.2478/acs-2023-0007","DOIUrl":"https://doi.org/10.2478/acs-2023-0007","url":null,"abstract":"Abstract Analysis of lime peel was applied to assess their suitability for various intended purposes, e.g., application in perfumery, cosmetics, and cleaning products, or as a source of bioactive or other value-added compounds. Targeted analysis allows wider usability of the waste part of these natural materials. In the present study, a novel, efficient, lab-simple, time-saving analytical method for coumarins determination in lime peel, including sample pretreatment by extraction and quantification by HPLC with fluorescence detection (FLD), is introduced. Optimal conditions of ultrasound assisted extraction included water as extraction solvent, temperature of 40 °C, and extraction time of 10 min. A magnetic molecularly imprinted polymer was employed as solid phase extraction adsorbent for primary extract cleaning, isolation, and enrichment of coumarins before chromatographic analysis. Recovery of herniarin and umbelliferone was more than 86 % ((RSD ≤ 4.8 %). Linear range of 50—1000 ng/mL with correlation coefficient above 0.998 was obtained for the proposed HPLC-FLD method. The limit of quantification was 8.2 and 44 ng/mL for herniarin and umbelliferone, respectively. These results show that the proposed sample pretreatment procedure is suitable for analytical purposes and is perspective also for the analysis of other citrus samples, as well as for future scale-up preparative isolation of bioactive coumarins from citrus peel.","PeriodicalId":7088,"journal":{"name":"Acta Chimica Slovaca","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135844135","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

DFT studies of camptothecins cytotoxicity IV — active and inactive forms of irinotecan 喜树碱细胞毒性的DFT研究Ⅳ——伊立替康的活性和非活性形式

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Acta Chimica Slovaca Pub Date : 2023-01-01 DOI: 10.2478/acs-2023-0001

M. Štekláč, M. Breza

引用次数: 0

Study on secondary metabolites of Trichoderma atroviride F742 and their role in antibiosis atroviride木霉F742次生代谢产物及其抗菌作用的研究

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Acta Chimica Slovaca Pub Date : 2023-01-01 DOI: 10.2478/acs-2023-0002

Tomáš Pagáč, Zuzana Kubová, J. Víglaš, Zuzana Kavalová, P. Olejníková

{"title":"Study on secondary metabolites of Trichoderma atroviride F742 and their role in antibiosis","authors":"Tomáš Pagáč, Zuzana Kubová, J. Víglaš, Zuzana Kavalová, P. Olejníková","doi":"10.2478/acs-2023-0002","DOIUrl":"https://doi.org/10.2478/acs-2023-0002","url":null,"abstract":"Abstract Soil-borne pathogenic fungi responsible for serious damage in agriculture are widely distributed. Traditional approach to control these pathogens leads to the use of chemical fungicides, many of which have proven harmful side effects on the environment. Mycoparasitic fungi of the genus Trichoderma have been used for pathogens biocontrol as well as for their ability to promote plant growth. As increased mycoparasitic activity of mutant strain Trichoderma atroviride F742 has been observed, its use as a biocontrol agent might be considered. In this work, we focused on mycoparasitic activity of the strain T. atroviride F742 prepared by UV mutagenesis (from parental strain T. atroviride F534) and the physiological role of T. atroviride metabolites in antibiosis. T. atroviride F742 shows remarkable mycoparasitic activity attacking and colonizing phytopathogens (Alternaria alternata, Botrytis cinerea, Fusarium culmorum). Its isolated metabolites inhibit the growth of bacteria, yeasts, and fungi Candida albicans, A. alternata and F. culmorum. As different expression patterns in the secondary metabolites production of ABC transporters have been observed, we suggest their role in transport of secondary metabolites produced by T. atroviride F742.","PeriodicalId":7088,"journal":{"name":"Acta Chimica Slovaca","volume":"16 1","pages":"12 - 21"},"PeriodicalIF":0.8,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48245802","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

Simultaneous detection of purine metabolites by membrane modified electrochemical sensors 膜修饰电化学传感器同时检测嘌呤代谢产物

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Acta Chimica Slovaca Pub Date : 2022-01-01 DOI: 10.2478/acs-2022-0007

J. Blaskovicová, Andrea Purdesová

{"title":"Simultaneous detection of purine metabolites by membrane modified electrochemical sensors","authors":"J. Blaskovicová, Andrea Purdesová","doi":"10.2478/acs-2022-0007","DOIUrl":"https://doi.org/10.2478/acs-2022-0007","url":null,"abstract":"Abstract Purine metabolites are important for metabolic and cellular processes. Deregulation of purinergic signaling leads to pathological accumulation of purine degradation products in extracellular fluids and indicates various diseases. In clinical diagnosis at early stages of related diseases, accurate detection of Uric acid and Xanthine is of high importance. Electrochemical methods are fast, simple, sensitive, more convenient, and cost-effective compared to other analytical methods used in purine metabolites signaling. Electrochemical sensors are able to detect more compounds simultaneously. Modification of a glassy carbon electrode sensor with external protective membranes was used in this study to avoid unwanted signal interferences from analyte matrices. Polyvinyl alcohol, Chitosan, and Nafion membranes were selected for sensor modification to compare the electro-neutral, positive and negative charged setting of the Xanthine and Uric acid detection. All three membrane modified sensors showed adequate stability in the phosphate buffer solution after 5 min of incubation and are thus suitable for simultaneous detection of purine metabolites. The best results in anodic peak current response values were observed using the Nafion membrane modified glassy carbon electrode sensor. The approach reported here can be useful for the detection of purine metabolites from various matrices at early stages of clinical diagnosis.","PeriodicalId":7088,"journal":{"name":"Acta Chimica Slovaca","volume":"15 1","pages":"54 - 60"},"PeriodicalIF":0.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48734319","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: 1

Modeling of transport properties of binary mixtures including ionic liquids based on their experimental estimation 基于实验估计的含离子液体二元混合物输运性质建模

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Acta Chimica Slovaca Pub Date : 2022-01-01 DOI: 10.2478/acs-2022-0014

P. Steltenpohl, Anna Holečková, E. Graczová

引用次数: 1

Analytical methods for pesticide residues determination in propolis and propolis-based products 蜂胶和蜂胶基产品中农药残留测定的分析方法

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Acta Chimica Slovaca Pub Date : 2022-01-01 DOI: 10.2478/acs-2022-0012

I. Blažková, J. Hrouzek, Agneša Szarka, Tamara Pócsová, S. Hrouzková

{"title":"Analytical methods for pesticide residues determination in propolis and propolis-based products","authors":"I. Blažková, J. Hrouzek, Agneša Szarka, Tamara Pócsová, S. Hrouzková","doi":"10.2478/acs-2022-0012","DOIUrl":"https://doi.org/10.2478/acs-2022-0012","url":null,"abstract":"Abstract As a result of massive bee deaths in recent years, beekeeping is raising concerns about the presence of pesticides in propolis which is considered as a safe product. The paper is focused on the analysis of bee propolis and propolis-based products using various chromatographic techniques using mass spectrometry detection predominantly. An important part of the work is an overview concerning methods of sample preparation, extraction, and purification of extracts, followed by separation and detection techniques. Positive findings of contaminants and their concentrations in propolis samples and propolis products were evaluated. Sorption based techniques such as matrix solid phase dispersion and solvent-based extraction techniques are frequently applied for propolis analysis in connection with chromatographic techniques. Liquid-based extractions, such as the QuEChERS extraction technique (Quick, Easy, Cheap, Effective, Rugged, Safe), combine extraction by solvent with several ways of extract cleaning using combinations of salts and sorbents, primary secondary amine, MgSO4, NaCl, graphitized carbon, EMR-lipid, florisil, or octadecylsilane-modified silica gel. Other extraction techniques were reviewed. The most significant problem to be considered in pesticides detection is the topic of matrix effects, which have to be solved for each sample analysis with special care.","PeriodicalId":7088,"journal":{"name":"Acta Chimica Slovaca","volume":"15 1","pages":"103 - 116"},"PeriodicalIF":0.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48841620","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: 3