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Investigating structural changes of Chitosan-TiO2 and Chitosan-TiO2-ZnO-MgO hybrid films during storage by FTIR spectroscopy 用FTIR光谱研究壳聚糖-TiO2和壳聚糖-TO2-ZnO-MgO杂化膜在贮存过程中的结构变化
IF 1 4区 化学
Macedonian Journal of Chemistry and Chemical Engineering Pub Date : 2021-11-26 DOI: 10.20450/mjcce.2021.2396
L. M. Anaya-Esparza, J. M. Ruvalcaba-Gómez, R. Romero-Toledo, J. Sánchez-Burgos, E. Montalvo-González, A. Pérez-Larios
{"title":"Investigating structural changes of Chitosan-TiO2 and Chitosan-TiO2-ZnO-MgO hybrid films during storage by FTIR spectroscopy","authors":"L. M. Anaya-Esparza, J. M. Ruvalcaba-Gómez, R. Romero-Toledo, J. Sánchez-Burgos, E. Montalvo-González, A. Pérez-Larios","doi":"10.20450/mjcce.2021.2396","DOIUrl":"https://doi.org/10.20450/mjcce.2021.2396","url":null,"abstract":"","PeriodicalId":18088,"journal":{"name":"Macedonian Journal of Chemistry and Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2021-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42889998","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: 4
Antioxidant capacity and antimicrobial effects of zinc complexes of flavonoids – Does synergism exist? 黄酮类化合物锌配合物的抗氧化能力和抗菌作用——是否存在协同作用？
IF 1 4区 化学
Macedonian Journal of Chemistry and Chemical Engineering Pub Date : 2021-11-26 DOI: 10.20450/mjcce.2021.2401
Leposava Pavun, Aleksandra Janošević-Ležaić, S. Tanasković, D. Ušjak, M. Milenković, S. Uskoković-Marković
{"title":"Antioxidant capacity and antimicrobial effects of zinc complexes of flavonoids – Does synergism exist?","authors":"Leposava Pavun, Aleksandra Janošević-Ležaić, S. Tanasković, D. Ušjak, M. Milenković, S. Uskoković-Marković","doi":"10.20450/mjcce.2021.2401","DOIUrl":"https://doi.org/10.20450/mjcce.2021.2401","url":null,"abstract":"","PeriodicalId":18088,"journal":{"name":"Macedonian Journal of Chemistry and Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2021-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41808563","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
Development of a novel microbiological method for detection of gamma irradiated spices 一种新型γ辐照香料微生物检测方法的建立
IF 1 4区 化学
Macedonian Journal of Chemistry and Chemical Engineering Pub Date : 2021-11-26 DOI: 10.20450/mjcce.2021.2397
Irina Mladenovska, Nora Limani Bektashi, Beti Andonović, H. Spasevska, I. Sandeva, Milica Arizanova, S. Mašić, Arianit A. Reka
{"title":"Development of a novel microbiological method for detection of gamma irradiated spices","authors":"Irina Mladenovska, Nora Limani Bektashi, Beti Andonović, H. Spasevska, I. Sandeva, Milica Arizanova, S. Mašić, Arianit A. Reka","doi":"10.20450/mjcce.2021.2397","DOIUrl":"https://doi.org/10.20450/mjcce.2021.2397","url":null,"abstract":",","PeriodicalId":18088,"journal":{"name":"Macedonian Journal of Chemistry and Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2021-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48456572","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: 1
Development of voltammetric melanin sensor with 2,5-dimethylfuran modified platinum electrode 2,5-二甲基呋喃修饰铂电极伏安式黑色素传感器的研制
IF 1 4区 化学
Macedonian Journal of Chemistry and Chemical Engineering Pub Date : 2021-11-26 DOI: 10.20450/mjcce.2021.2399
Muammer Burç, D. Asma, Serap Titretir Duran
{"title":"Development of voltammetric melanin sensor with 2,5-dimethylfuran modified platinum electrode","authors":"Muammer Burç, D. Asma, Serap Titretir Duran","doi":"10.20450/mjcce.2021.2399","DOIUrl":"https://doi.org/10.20450/mjcce.2021.2399","url":null,"abstract":"","PeriodicalId":18088,"journal":{"name":"Macedonian Journal of Chemistry and Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2021-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46792126","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: 1
Reactions of a trans-diamminediaquaplatinum(II) complex with L-cysteine 反式二胺二水铂(II)配合物与l -半胱氨酸的反应
IF 1 4区 化学
Macedonian Journal of Chemistry and Chemical Engineering Pub Date : 2021-11-26 DOI: 10.20450/mjcce.2021.2400
S. Hadi, B. Irawan, N. Noviany, Y. Yandri, T. Suhartati
{"title":"Reactions of a trans-diamminediaquaplatinum(II) complex with L-cysteine","authors":"S. Hadi, B. Irawan, N. Noviany, Y. Yandri, T. Suhartati","doi":"10.20450/mjcce.2021.2400","DOIUrl":"https://doi.org/10.20450/mjcce.2021.2400","url":null,"abstract":"The reaction of a trans-diamminediaquaplatinum(II) complex, trans-[Pt(NH3)2(H2O)2] (1), and L-cysteine (R–SH) has been performed to confirm the formation of the products in the solution. The reaction was monitored by 1-D N and 2-D [H, N] heteronuclear single-quantum coherence (HSQC) Nuclear Magnetic Resonance (NMR) and electrospray ionization (ESI) mass spectrometry. The reaction was initially performed in an alkaline solution; the platinum mononuclear species products were observed. The pH of the solution was then decreased to an acidic solution; the products obtained were oligomeric platinum products. Based on the spectrum from mass spectrometry, which was obtained in a basic solution, the most dominant complex in the solution is a dinuclear platinum(II) species with a sulfur-bridging, trans-[{Pt(S-cys)2(NH3)2}2(S-cys)] having m/z of 822. The loss of two successive ammines was observed.","PeriodicalId":18088,"journal":{"name":"Macedonian Journal of Chemistry and Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2021-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46766530","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
Micellar properties of cetyltrimethylammonium bromide in an acetonitrile–water mixture: Conductometric and fluorescence studies 十六烷基三甲基溴化铵在乙腈-水混合物中的胶束性质:电导和荧光研究
IF 1 4区 化学
Macedonian Journal of Chemistry and Chemical Engineering Pub Date : 2021-11-26 DOI: 10.20450/mjcce.2021.2394
A. Janošević Ležaić, N. Pejić, Jelena Goronja, Leposava Pavun, Danijela Đikanović, A. Malenović
{"title":"Micellar properties of cetyltrimethylammonium bromide in an acetonitrile–water mixture: Conductometric and fluorescence studies","authors":"A. Janošević Ležaić, N. Pejić, Jelena Goronja, Leposava Pavun, Danijela Đikanović, A. Malenović","doi":"10.20450/mjcce.2021.2394","DOIUrl":"https://doi.org/10.20450/mjcce.2021.2394","url":null,"abstract":",","PeriodicalId":18088,"journal":{"name":"Macedonian Journal of Chemistry and Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2021-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46121248","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
A safe way of performing dangerous experiments. III. The safety box. 2. Demonstrating the reactions of alkali metals with concentrated oxoacids 一种进行危险实验的安全方法。3保险箱。2. 证明碱金属与浓氧酸的反应
IF 1 4区 化学
Macedonian Journal of Chemistry and Chemical Engineering Pub Date : 2021-05-25 DOI: 10.20450/MJCCE.2021.2218
M. Bukleski, V. Petruševski, Slavica Aleksova
{"title":"A safe way of performing dangerous experiments. III. The safety box. 2. Demonstrating the reactions of alkali metals with concentrated oxoacids","authors":"M. Bukleski, V. Petruševski, Slavica Aleksova","doi":"10.20450/MJCCE.2021.2218","DOIUrl":"https://doi.org/10.20450/MJCCE.2021.2218","url":null,"abstract":"A way to conciliate one of the most dangerous reactions and at the same time, a way of a systematic approach towards studying the reaction of the alkali metals and acids, has been offered. Explanation of the observed phenomena considering the extent of how vigorous the reaction is and the circumstances contributing to the rate of reaction due to the precipitate formation or water presence, are discussed.  In this paper, the reaction between some concentrated aqueous solutions of oxoacids (HNO3, H3PO4, H2SO4, HClO4) and alkali metals (Li, Na, K) are considered. Video clips of the experiments were prepared as an aid for those instructors that lack experience and/or the necessary materials. This publication is a continuation of the previously published article about the reaction of alkali metals with hydrohalic acids and is part of the series of publications under the general title “A Safe Way of Performing Dangerous Experiments”.","PeriodicalId":18088,"journal":{"name":"Macedonian Journal of Chemistry and Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2021-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67570522","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
Physicochemical parameters as indicators of the authenticity of monofloral honey from the territory of the Republic of Serbia 物理化学参数作为塞尔维亚共和国境内单花蜂蜜真实性的指标
IF 1 4区 化学
Macedonian Journal of Chemistry and Chemical Engineering Pub Date : 2021-05-13 DOI: 10.20450/MJCCE.2021.2186
Saša Milosavljević, M. Jadranin, Mica A. Mladenovic, V. Tešević, N. Menković, D. Mutavdžić, G. Krstić
{"title":"Physicochemical parameters as indicators of the authenticity of monofloral honey from the territory of the Republic of Serbia","authors":"Saša Milosavljević, M. Jadranin, Mica A. Mladenovic, V. Tešević, N. Menković, D. Mutavdžić, G. Krstić","doi":"10.20450/MJCCE.2021.2186","DOIUrl":"https://doi.org/10.20450/MJCCE.2021.2186","url":null,"abstract":"The aim of this research was to verify the authenticity of monofloral honeys from the territory of the Republic of Serbia on the basis of physicochemical parameters routinely measured in honey quality control using multivariate analysis. Seventeen samples of monofloral honey (11 samples of acacia honey and 6 samples of sunflower honey) from the territory of the Republic of Serbia were analyzed. Physicochemical analysis of the samples included the examination of basic quality parameters and qualitative and quantitative analyses of phenolic compounds. In the samples tested, a total of 93 phenolic compounds were tentatively identified, and 19 of them were quantified. The obtained physicochemical analysis of the data served as input for the multivariate analysis. The hеаt map, which is useful for visualizing numerical data, was used for this purpose. The obtained results showed that the applied data can serve to clearly separate acacia and sunflower honeys.","PeriodicalId":18088,"journal":{"name":"Macedonian Journal of Chemistry and Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2021-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48181785","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: 2
Microwave assisted solvent-free mannich bases: synthesis, characterization and effects of these compounds on HCA I and HCA II isozymes 微波辅助无溶剂mannich碱的合成、表征及其对HCAⅠ和HCAⅡ同工酶的影响
IF 1 4区 化学
Macedonian Journal of Chemistry and Chemical Engineering Pub Date : 2021-05-12 DOI: 10.20450/MJCCE.2021.1968
B. Büyükkıdan, Nurgün Büyükkıdan, M. Bülbül, M. Yılmaz, Evren Derrun Arslanbay, Ekrem Tunca
{"title":"Microwave assisted solvent-free mannich bases: synthesis, characterization and effects of these compounds on HCA I and HCA II isozymes","authors":"B. Büyükkıdan, Nurgün Büyükkıdan, M. Bülbül, M. Yılmaz, Evren Derrun Arslanbay, Ekrem Tunca","doi":"10.20450/MJCCE.2021.1968","DOIUrl":"https://doi.org/10.20450/MJCCE.2021.1968","url":null,"abstract":"Mannich bases (2a–d) of aromatic amines were synthesized by using a conventional microwave technique under solvent-free conditions and characterized by IR and NMR (1H and 13C) and elemental analysis. The inhibitory effects of the synthesized Mannich bases were examined in vitro by using hydratase and esterase assays on carbonic anhydrase I and II isozymes (hCA, EC 4.2.1.1) purified from human erythrocyte cells. Acetazolamide was used as the control compound. The values of IC50, the half-maximum inhibitory concentration, were found for hydratase and esterase activities. Only two compounds (2b and 2d) exhibited poor hCA I and hCA II inhibition effects on esterase activity. In contrast, compounds 2a and 2c could be used as carbonic anhydrase activators as a result of the increased esterase activity of hCA I and hCA II isozymes.","PeriodicalId":18088,"journal":{"name":"Macedonian Journal of Chemistry and Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2021-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46582988","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
Voltammetric quantification of a nonsteroidal anti-inflammatory agent diflunisal based on the enhancement effect of cationic surfactant on boron-doped diamond electrode 基于阳离子表面活性剂对掺硼金刚石电极增强作用的非甾体抗炎剂双氟尼拉的伏安定量
IF 1 4区 化学
Macedonian Journal of Chemistry and Chemical Engineering Pub Date : 2021-05-11 DOI: 10.20450/MJCCE.2021.2172
Ertuğrul Keskin, Shabnam Allahverdiyeva, Amer S. Alali, Yavuz Yardım
{"title":"Voltammetric quantification of a nonsteroidal anti-inflammatory agent diflunisal based on the enhancement effect of cationic surfactant on boron-doped diamond electrode","authors":"Ertuğrul Keskin, Shabnam Allahverdiyeva, Amer S. Alali, Yavuz Yardım","doi":"10.20450/MJCCE.2021.2172","DOIUrl":"https://doi.org/10.20450/MJCCE.2021.2172","url":null,"abstract":"The present work describes a simple, fast, and inexpensive voltammetric method for diflunisal measurement using a non-modified boron-doped diamond (BDD) electrode. The oxidation of the agent was irreversible and presented a diffusion‐controlled process. The sensitivity of the square wave voltammetric measurements were significantly improved when the cationic surfactant, cetyltrimethylammonium bromide (CTAB), was present in the supporting electrolyte solution. Using square-wave mode, a linear response was obtained for diflunisal quantification in 0.1 mol L-1 phosphate buffer solution (pH 2.5) solution containing 5×10-5 mol L-1 CTAB at +1.07 V (vs. Ag/AgCl) (after 30 s accumulation under open-circuit conditions). Linearity was found for 0.05 to 2.0 μg mL-1 (2.0×10-7-8.0×10-6 mol L-1) with a detection limit 0.013 μg mL-1 (5.2×10-8 mol L-1). The developed approach could be used for the quantification of diflunisal in pharmaceutical formulations.","PeriodicalId":18088,"journal":{"name":"Macedonian Journal of Chemistry and Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2021-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47689422","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: 2
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