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Immobilization of natural betalain pigments in inorganic hosts 天然甜菜素色素在无机寄主中的固定化
IF 1 4区 化学
Journal of The Serbian Chemical Society Pub Date : 2023-01-01 DOI: 10.2298/jsc221028010t
L. Todan, D. Culiță, Mirabela Soare, R. Ion, R. Fierăscu, M. Maganu
{"title":"Immobilization of natural betalain pigments in inorganic hosts","authors":"L. Todan, D. Culiță, Mirabela Soare, R. Ion, R. Fierăscu, M. Maganu","doi":"10.2298/jsc221028010t","DOIUrl":"https://doi.org/10.2298/jsc221028010t","url":null,"abstract":"search of new food-grade pH sensitive formulations, red beet extract rich in betacyanin was included in different inorganic matrices based on silica and aluminosilicate to improve the stability of the dye. By the direct method of encapsulation of the pigments in silica support, stabilizing agents such as inclusion complex forming ?-cyclodextrin and ascorbic acid were added. The post loading system assumes the synthesis of porous silica and aluminosilicate powders and the adsorption of the beet extract by these supports. The unloaded carriers were structurally and texturally characterized (X-ray diffraction, FTIR, N2-physisorption). The presence of betanin, approved as a red food colorant, was evidenced by UV-vis spectroscopy in all the hosts. Color properties were investigated as well as the pH generated color variations of the powders exposed to ammonia in the head-space of a sealed vessel. The obtained results could widen the field of applications of beet extract, the prepared ecological formulations could provide added value to edible products packaging.","PeriodicalId":17489,"journal":{"name":"Journal of The Serbian Chemical Society","volume":"1 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68515916","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
Adsorption of Tannase from Aspergillus ficuum to carboxyl-functionalized multi-walled carbon nanotubes 羧基功能化多壁碳纳米管对无花果曲霉鞣酶的吸附研究
IF 1 4区 化学
Journal of The Serbian Chemical Society Pub Date : 2023-01-01 DOI: 10.2298/jsc221121009a
Matthew Alias, C. Ong, Annuar Mohamad
{"title":"Adsorption of Tannase from Aspergillus ficuum to carboxyl-functionalized multi-walled carbon nanotubes","authors":"Matthew Alias, C. Ong, Annuar Mohamad","doi":"10.2298/jsc221121009a","DOIUrl":"https://doi.org/10.2298/jsc221121009a","url":null,"abstract":"The immobilization of cross-linked tannase onto carboxyl-functionalized multi-walled carbon nanotubes (MWCNT?COOH) was achieved via physical adsorption. Glutaraldehyde was used to cross-link the enzyme molecules. Spectroscopic and morphological characterizations of the enzyme-nanotubes composite were carried out, which authenticated the successful adsorption event. Enzyme composite is proven equal to-, or even superior than free tannase, in terms of catalytic activities and stabilities, when measured under different thermal-, pH-, and recycling conditions. Whilst both free- and immobilized tannase preparations exhibited optimum catalysis at pH 5.0 and 35?C, tannase-nanotubes composite possesses better thermal stability. The immobilized preparation retained 75% of its initial catalytic activity following ten consecutives use. The study demonstrated a facile method to produce catalytically-efficient nanobiocatalyst composite for biotechnological applications.","PeriodicalId":17489,"journal":{"name":"Journal of The Serbian Chemical Society","volume":"1 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68515814","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
Copper ions biosorption onto bean shells: kinetics, equilibrium, and process optimization studies 铜离子在豆壳上的生物吸附:动力学、平衡和过程优化研究
IF 1 4区 化学
Journal of The Serbian Chemical Society Pub Date : 2023-01-01 DOI: 10.2298/jsc221018014m
Miljana S. Marković, M. Gorgievski, N. Strbac, Kristina Božinović, V. Grekulovic, A. Mitovski, Milica Zdravkovic
{"title":"Copper ions biosorption onto bean shells: kinetics, equilibrium, and process optimization studies","authors":"Miljana S. Marković, M. Gorgievski, N. Strbac, Kristina Božinović, V. Grekulovic, A. Mitovski, Milica Zdravkovic","doi":"10.2298/jsc221018014m","DOIUrl":"https://doi.org/10.2298/jsc221018014m","url":null,"abstract":"The removal of copper ions from aqueous solutions using bean shells as an adsorbent is presented in this paper. The influence of the solution solution pH on the biosorption capacity was investigated. The biosorption capacity increased with the increase in the solution pH. The pseudo-second order kinetic model showed the best agreement with the analyzed experimental data, indicating that chemisorption could be a possible way of binding the copper ions to the surface of the bean shells. The Langmuir isotherm model best fitted the analyzed isotherm data. The SEM-EDS analysis was performed before and after the biosorption process. The change in the morphology of the sample after the biosorption process was evident, whereby K, Mg, Si, and Ca were possibly exchanged with copper ions. Response Surface Methodology (RSM) based on the Box-Behnken design (BBD) was used to optimize the biosorption process, with the selected factors: the solution pH, initial copper ions concentration, and contact time. The optimum biosorption conditions were determined to be: pH = 3-4, initial copper ions concentration 100 mg dm-3, and contact time 10-30 minutes.","PeriodicalId":17489,"journal":{"name":"Journal of The Serbian Chemical Society","volume":"1 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68515837","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
Flavonoid derivatives as anticancer moiety and its effect on cancer cell lines: An updated review 类黄酮衍生物的抗癌作用及其对癌细胞的作用:最新进展
IF 1 4区 化学
Journal of The Serbian Chemical Society Pub Date : 2023-01-01 DOI: 10.2298/jsc221228041m
C. Manojmouli, T. Pasha, K. Nagaprashant, B. Ramesh, Eain Ul, K. Purushotham
{"title":"Flavonoid derivatives as anticancer moiety and its effect on cancer cell lines: An updated review","authors":"C. Manojmouli, T. Pasha, K. Nagaprashant, B. Ramesh, Eain Ul, K. Purushotham","doi":"10.2298/jsc221228041m","DOIUrl":"https://doi.org/10.2298/jsc221228041m","url":null,"abstract":"Cancer is now considered the number one leading cause of premature death in industrialized countries. Chemotherapy drugs are quite expensive and cause multiple side effects. Natural products have been studied in depth for their potential as anticancer agents because of their remarkable chemical variability. Among the various natural metabolites, flavonoids are secondary metabolites that are extensively present in nature, have potent anti-cancer properties, have few adverse effects, and also show synergistic benefits. Numerous laboratories are diligently investigating the chemistry and biology of novel flavonoid derivatives due to the demand for and worth of these drugs. In this review, we summarized clinical trials of various flavonoids, molecular pathways against various cancer cell lines, and recent updates on the anticancer activity of flavonoid derivatives against various cancer cells synthesized by various methods, more studies are needed to develop the following mentioned flavonoid derivatives as an anticancer drug.","PeriodicalId":17489,"journal":{"name":"Journal of The Serbian Chemical Society","volume":"1 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68516420","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
Mass transfer in inverse fluidized beds 反流化床中的传质
IF 1 4区 化学
Journal of The Serbian Chemical Society Pub Date : 2023-01-01 DOI: 10.2298/jsc230116016j
Darko Jacimovski, Katarina Sucurovic, M. Djuris, Z. Arsenijević, S. Krstić, N. Boskovic-Vragolovic
{"title":"Mass transfer in inverse fluidized beds","authors":"Darko Jacimovski, Katarina Sucurovic, M. Djuris, Z. Arsenijević, S. Krstić, N. Boskovic-Vragolovic","doi":"10.2298/jsc230116016j","DOIUrl":"https://doi.org/10.2298/jsc230116016j","url":null,"abstract":"In this work, the coefficient of fluid-wall mass transfer in an inverse fluidized bed was determined using the adsorption method. The experiments were carried out in a column with a diameter of 45 mm with spherical and non-spherical particles of polypropylene and polyethylene with a diameter of 3.3-4.9 mm and a density of about 930 kg m-3. A diluted solution of methylene blue was used as a fluidization medium, which was adsorbed on part of the surface of the column on silica gel. The obtained results showed that the presence of particles during inverse fluidization does not contribute significantly to mass transfer compared to the influence of particles on transfer in conventional fluidized beds. Therefore, the pseudofluid concept was introduced into the analysis and an empirical correlation was performed to determine the mass transfer coefficient. The obtained results were compared with literature correlations for inverse and conventional fluidized beds.","PeriodicalId":17489,"journal":{"name":"Journal of The Serbian Chemical Society","volume":"1 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68516865","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
Designing an electrochemical biosensor based tyrosinase for highly sensitive and rapid detection of Bisphenol-a and its derivatives 设计一种基于酪氨酸酶的电化学生物传感器，用于高灵敏度和快速检测双酚a及其衍生物
IF 1 4区 化学
Journal of The Serbian Chemical Society Pub Date : 2023-01-01 DOI: 10.2298/jsc221122013b
O. Bodur, M. Keskin, Başak Avan, Halit Arslan
{"title":"Designing an electrochemical biosensor based tyrosinase for highly sensitive and rapid detection of Bisphenol-a and its derivatives","authors":"O. Bodur, M. Keskin, Başak Avan, Halit Arslan","doi":"10.2298/jsc221122013b","DOIUrl":"https://doi.org/10.2298/jsc221122013b","url":null,"abstract":"Bisphenol-A (BPA) is a monomer commonly used in the production of epoxy resins, plastic bottles and dental filling materials. Due to its chemical structure, BPA and its derivates shows activity similar to the endocrine hormones. It can bind to estrogen receptors and cause neurological disturbances, even at low doses. Therefore, it is important to determine BPA and its derivatives quickly and sensitively at low concentrations. In this study, a single amperometric tyrosinase enzyme biosensor was designed for the determination of the amount of BPA, BPF (Bisphenol F) and BPS (Bisphenol S) monomers. Tyrosinase was immobilized onto a modified carbon paste electrode by cross-linking with glutaraldehyde. The amount of BPA (BPS and BPF) was determined directly on the reduction of quinone compound that released as a result of the enzymatic reaction at -0.15V. Km(app) value of the designed biosensor for BPA was found 0.00067 ?M, the linear operating range was 0.001-0.005 ?M (a) and 0.03-0.1 ?M (b) and the lower detection limit was found 1 nM for each monomer. It is clear that designed biosensor is enable the fast, efficient and precise determination of BPA and its derivatives released from materials used in dental materials.","PeriodicalId":17489,"journal":{"name":"Journal of The Serbian Chemical Society","volume":"1 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68515878","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
Thermoanalytical and spectroscopic studies on medicated jellies with perphenazine 奋那嗪给药果冻的热分析和光谱研究
4区 化学
Journal of The Serbian Chemical Society Pub Date : 2023-01-01 DOI: 10.2298/jsc230402077b
Mihaela Budiul, Mădălina Mateescu, Gabriela Vlase, Titus Vlase, Simona Bocănici, Ionela Bradu
{"title":"Thermoanalytical and spectroscopic studies on medicated jellies with perphenazine","authors":"Mihaela Budiul, Mădălina Mateescu, Gabriela Vlase, Titus Vlase, Simona Bocănici, Ionela Bradu","doi":"10.2298/jsc230402077b","DOIUrl":"https://doi.org/10.2298/jsc230402077b","url":null,"abstract":"Medicated jellies are widely used by a large part of patients, especially by people with swallowing difficulties. Preformulation studies play an essential role in the development of new pharmaceutical formulations. The present study aimed to formulate and evaluate medicated jellies containing perphenazine, an antipsychotic drug from the group of phenothiazine compounds used to treat schizophrenia and other mental disorders. Typical gelling agents such as sodium alginate (Alg), gelatine (Gel), and pectin (Pec) were used to develop the medicated jellies. In addition to the biopolymers, components such as benzoic acid (BenzAc), citric acid (CitAc), sodium citrate (NaCit), sorbitol (Sorb), and xylitol (Xyl) were also used. Before preparing the jellies, the moist binary mixture between each component of the jelly and the active substance was analyzed to investigate the compatibility of the substances. The active substance, moist binary mixture, and medicated jellies were analyzed by FTIR_UATR spectroscopy, UV-Vis spectroscopy, and thermogravimetry (TGA).","PeriodicalId":17489,"journal":{"name":"Journal of The Serbian Chemical Society","volume":"146 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":"136301953","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
Copper leaching from the chalcopyrite-bearing MoS2 concentrate by mixed chlorides solution 混合氯化物浸出含黄铜矿的二硫化钼精矿中的铜
4区 化学
Journal of The Serbian Chemical Society Pub Date : 2023-01-01 DOI: 10.2298/jsc230114057t
Narangarav Tumen-Ulzii, Burmaa Gunchin
{"title":"Copper leaching from the chalcopyrite-bearing MoS2 concentrate by mixed chlorides solution","authors":"Narangarav Tumen-Ulzii, Burmaa Gunchin","doi":"10.2298/jsc230114057t","DOIUrl":"https://doi.org/10.2298/jsc230114057t","url":null,"abstract":"In this study, the dissolution of copper sulfide minerals by the ferric (FeCl3) and ferrous (FeCl2) chloride leaching for upgrading the content of molybdenum disulfide (MoS2) in a molybdenite concentrate was investigated. The effect of various parameters was studied on the copper dissolution behavior from the concentrate. In this matter, the copper dissolution was reached 94.84 % under the optimized leaching conditions. The kinetics of copper dissolution from the concentrate was established using a shrinking core model (SCM), and the process was controlled by diffusion, with a corresponding activation energy of 18.63 kJ mol-1 at the temperature range of 343-373 K. The amount of copper in the leachate was tested by the inductively coupled plazma-optical emission spectrometer (ICP-OES) and the solid phase was studied by X-ray diffraction (XRD), and scanning electron microscope (SEM). Results of the experiments show that the content of MoS2 in the solid residue was increased up to 88.59 % after the leaching.","PeriodicalId":17489,"journal":{"name":"Journal of The Serbian Chemical Society","volume":"42 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":"135400561","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
Inhibition study of curcumin extract’s effect on dissimilar aluminium joint 姜黄素提取物对不同铝关节的抑制作用研究
4区 化学
Journal of The Serbian Chemical Society Pub Date : 2023-01-01 DOI: 10.2298/jsc230424074p
Kamatchi Pravinkumar, Vaddi Rao, Rengarajan Sathish
{"title":"Inhibition study of curcumin extract’s effect on dissimilar aluminium joint","authors":"Kamatchi Pravinkumar, Vaddi Rao, Rengarajan Sathish","doi":"10.2298/jsc230424074p","DOIUrl":"https://doi.org/10.2298/jsc230424074p","url":null,"abstract":"Aluminium welded joints are offering greater interest to researchers owing to the replacement of heavy steel structures and reduction in the weight of the components used in the automobile and marine environments. In this study AA6061 and AA8011 have been welded by using the bobbin tool friction stir welding method and by varying the process parameters with the samples being subjected to corrosion environments. The corrosive nature of the welded alloys in the absence and presence of inhibitors (curcumin) has been examined by electrochemical methods and compared with raw samples. The ratio has been observed between 0.075 and 5.42 A cm-2. The results reveal that corrosion control tendency has been improved by the AA6061 and AA8011 aluminium alloy joint in the presence of curcumin extract.","PeriodicalId":17489,"journal":{"name":"Journal of The Serbian Chemical Society","volume":"33 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":"136206863","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
Application of liquid chromatography in defining the interaction of newly synthesized chalcones and related compounds with human serum albumin 应用液相色谱法测定新合成的查尔酮及其相关化合物与人血清白蛋白的相互作用
IF 1 4区 化学
Journal of The Serbian Chemical Society Pub Date : 2023-01-01 DOI: 10.2298/jsc221212033t
Nemanja Turkovic, Nastasija Andjelkovic, D. Obradović, Z. Vujić, B. Ivković
{"title":"Application of liquid chromatography in defining the interaction of newly synthesized chalcones and related compounds with human serum albumin","authors":"Nemanja Turkovic, Nastasija Andjelkovic, D. Obradović, Z. Vujić, B. Ivković","doi":"10.2298/jsc221212033t","DOIUrl":"https://doi.org/10.2298/jsc221212033t","url":null,"abstract":"Defining the interaction of newly synthesized compounds with plasma proteins is an important step in the drug development process. Chromatographic techniques can be successfully used in predicting the biopharmaceutical and pharmacokinetic properties of newly synthesized compounds. The aim of this study is to investigate and isolate the most important molecular properties that affect the interaction of 20 newly synthesized chalcones and commercial compounds (lopinavir, ritonavir, darunavir and ivermectin) with human serum albumin (HSA). The retention behavior of the selected compounds was tested on a CHIRALPAK?HSA column. A mixture of phosphate buffer (pH 7.0) and isopropanol (80:20(v/v)) was used as the mobile phase, and the support vector method was used to form the QSRR model. Based on the obtained values of retention parameters, it was observed that halogenated derivatives show the strongest, and methylated chalcone derivatives the weakest interaction with HSA. By correlating the retention and physicochemical properties of the tested compounds, it was shown that the structural (SDSCH) and electronic properties (MAXQ, EEM_F1) groups have the greatest influence on the retention behavior and interaction of the tested compounds with HSA. The obtained QSRR model can be applied in the prediction of retention characteristics of new, structurally related chalcone derivatives on HSA stationary phase.","PeriodicalId":17489,"journal":{"name":"Journal of The Serbian Chemical Society","volume":"1 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68516384","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
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