Macedonian Journal of Chemistry and Chemical Engineering最新文献

{"title":"Phenolic fingerprint of Macedonian propolis","authors":"Jasmina Petreska Stanoeva, Cvetan Stojchevski, V. Bankova, M. Stefova","doi":"10.20450/mjcce.2024.2862","DOIUrl":"https://doi.org/10.20450/mjcce.2024.2862","url":null,"abstract":"Propolis is a chemically complex resinous material collected by honeybees (Apis mellifera) from tree buds and resins, comprising plant exudates, secreted substances from bee metabolism, pollen and waxes. Its chemical composition depends strongly on the plant sources available around the beehive, which have a direct impact оn the quality and bioactivity of the propolis. \u0000In this study, the composition of phenolic compounds in 13 Macedonian propolis extracts was investigated by HPLC-DAD-ESI-MS/MS. Overall, the UV spectra, the MS and MS/MS data allowed the identification of 36 compounds. \u0000The major constituents of propolis were phenolic acids (caffeic and coumaric) and their esters (methyl, (iso)prenyl, benzyl, phenylethyl, cinnamyl), flavonols (quercetin, kaemferol), flavones (chrysin, apigenin, acacetin), flavanonols (pinobanksin) flavanones (pinocembrin naringenin, hesperetin, pinostrobin) and their methylated/esterified derivatives. \u0000The results reveal that Macedonian propolis contains a diversity of phenolic compounds confirming that it is a poplar type of propolis with higher phenolic content (ranging from 43.75–637.94 mg/g) than reported in previous studies in the region and beyond in Europe (< 80 mg/g). This suggests the potential significance of Macedonian propolis as a valuable source of bioactive compounds with health benefits as well as for unlocking its economic potential for industry and beekeepers.","PeriodicalId":18088,"journal":{"name":"Macedonian Journal of Chemistry and Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141124807","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}

{"title":"A Comment of the comments","authors":"Pance Naumov","doi":"10.20450/mjcce.2024.2822","DOIUrl":"https://doi.org/10.20450/mjcce.2024.2822","url":null,"abstract":"Commenting on the work of other authors is justified when there are serious concerns related the scientific content, and the authors do not respond with valid arguments so that such concerns cannot be addressed. It should not be used to advertise one’s own work.  ","PeriodicalId":18088,"journal":{"name":"Macedonian Journal of Chemistry and Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140687312","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}

{"title":"Single-step, electrophoretically deposited hydroxyapatite/poly(vinyl alcohol)/chitosan/gentamicin coating for biomedical applications","authors":"Nevena Jaćimović, M. Djošić, A. Jankovic, Svetlana Grujić, Ivana Matić Bujagić, J. Stojanović, M. Vukašinović-Sekulić, Vesna Kojić, V. Mišković‐Stanković","doi":"10.20450/mjcce.2023.2775","DOIUrl":"https://doi.org/10.20450/mjcce.2023.2775","url":null,"abstract":"Biocomposite hydroxyapatite/poly(vinyl alcohol)/chitosan/gentamicin coatings were fabricated on titanium by electrophoretic deposition process (EPD) from an aqueous suspension using the constant voltage method.  Characterization of the deposited coatings was performed by scanning electron microscopy with field emission (FE–SEM), Fourier transform infrared spectroscopy (FT–IR) and X-ray diffraction (XRD) after immersion in simulated body fluid (SBF) at 37 °C. The concentration of the released gentamicin was determined using a high-performance liquid chromatography (HPLC) coupled with a mass spectrometer (MS). The release profile confirmed an initial “burst-release effect” with ~ 30% of gentamicin released in the first 48 h, which could be of assistance in the prevention of biofilm formation. Antibacterial activity was proven by the agar diffusion method on Staphylococcus aureus TL and Escherichia coli ATCC 25922 bacterial strains. Cytotoxicity was tested by the dye exclusion test (DET) on MRC-5 and L929 fibroblast cell lines, with both coatings expressing nontoxicity. The results showed the high applicability potential of a  poly(vinyl alcohol)-based biocomposite coating for medical purposes.","PeriodicalId":18088,"journal":{"name":"Macedonian Journal of Chemistry and Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139158602","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}

{"title":"Polyol synthesis of Ag nanowires and biocidal activity of the obtained product","authors":"Stanislav Kurajica, Marija Vuković Domanovac, K. Mužina","doi":"10.20450/mjcce.2023.2635","DOIUrl":"https://doi.org/10.20450/mjcce.2023.2635","url":null,"abstract":"Silver nanowires were prepared by the polyol process with ethylene glycol as a solvent and reducing agent, silver nitrate as a silver source, polyvinylpyrrolidone as a growth-directing agent, stabilizer and agglomeration prevention agent, and copper chloride as a growth control agent. The product was characterized by UV–Vis spectroscopy, scanning electron microscopy, and X-ray diffraction. The biocidal activity of silver nanowires was investigated using the disc diffusion method on the bacteria Bacillus subtilis and Pseudomonas aeruginosa and the fungi Aspergillus niger and Candida albicans. X-ray diffraction and scanning electron microscopy showed that, in addition to silver nanowires, the product also contains quasi-spherical silver nanoparticles and some silver chloride. Based on the results of UV–Vis spectroscopy and scanning electron microscopy, it was estimated that the diameter of the nanowires is 200–300 nm. Nanowires have shown weak bactericidal and good fungicidal activity. Silver nanowires showed particularly good activity in inhibiting the growth of Candida albicans.","PeriodicalId":18088,"journal":{"name":"Macedonian Journal of Chemistry and Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139159004","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}

{"title":"Characterization of tea water extracts and their utilization for dyeing and functionalization of fabrics of different chemical compositions","authors":"Leposava Pavun, Danijela Stojanović, A. Ivanovska, Jelena M. Lađarević, Marina Milenković, S. Uskoković-Marković","doi":"10.20450/mjcce.2023.2698","DOIUrl":"https://doi.org/10.20450/mjcce.2023.2698","url":null,"abstract":"Green, black, rooibos, and hibiscus tea (GT, BT, RT, and HT) aqueous extracts were prepared and characterized in terms of total flavonoids (TFC) and total phenolic (TPC) contents and antioxidant and antimicrobial activities. BT has the highest, while HT has the lowest TFC (1213 vs. 415 mg l–1), while the extracts’ TPCs (2283 – 7251 mg l–1) decreased in the following order: BT > GT > RT > HT. Their antioxidant activities of 78.1 – 93.1% and 97.8 – 100% were determined according to DPPH and ABTS methods, respectively. BT and especially GT aqueous extracts possessed mild effects against several microorganisms. All examined extracts have an affinity for dyeing wool, cellulose acetate, polyamide, and cotton, which is proven by the color strength values of 1.65–19.12. Wool, polyacrylonitrile, polyester, polyamide, cotton, and cellulose acetate functionalized with GT aqueous extract inhibited the growth of S. aureus and E. coli, while polyacrylonitrile and cotton also inhibited the growth of E. faecalis, and C. albicans, respectively. Wide inhibition zones for S. aureus were observed for fabrics functionalized with BT aqueous extract. Generally, the investigated fabrics showed very high (81.60 – 100%) ABTS radical scavenging ability independent of the extract used. TPCs have good linear correlations with the antioxidant activities of wool and polyacrylonitrile determined by the DPPH method. Fabrics with different chemical compositions dyed and/or functionalized with GT or BT aqueous extracts can be used to produce high-value-added medical textiles with therapeutic, prophylactic, and protective functions. They can find potential applications in wound treatment, especially in skin wounds that are susceptible to infection with S. aureus. Moreover, wool and cotton functionalized with GT or BT aqueous extract can also be considered for use in disposable medical textiles like bandages and gauze used in the wound-healing process.","PeriodicalId":18088,"journal":{"name":"Macedonian Journal of Chemistry and Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139159779","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}

{"title":"One-step extraction versus QuEChERS for pesticide analysis in selected fruits and vegetables","authors":"D. Andjelković, Milica Branković","doi":"10.20450/mjcce.2023.2762","DOIUrl":"https://doi.org/10.20450/mjcce.2023.2762","url":null,"abstract":"This research was focused on the performance evaluation of a simple sample preparation involving acetonitrile extraction followed by liquid chromatography/mass spectrometry (LC/MS) analysis. Simplified method validation parameters, along with several other features, were compared to those of the citrate QuEChERS for 19 pesticides analyzed in four representative fruits and vegetables. The results showed comparable performances of the two methods for 5 of the 6 investigated validation parameters. The simplified method had better performance regarding the selectivity, since three analytes experienced a selectivity issue in one of four QuEChERS-treated matrices. Overall, results lead to an assumption that acetonitrile extraction could be reasonably implemented in certain cases of pesticide analysis, as an efficient and economical alternative to the official method. Since the research provides an insight into acetonitrile extraction capabilities in the domain of pesticide analysis in complex matrices, scientists, researchers or analytical practitioners can determine which method is most beneficial for a particular analysis.","PeriodicalId":18088,"journal":{"name":"Macedonian Journal of Chemistry and Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139160813","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}

{"title":"Diclofenac analysis in natural waters using UV-visible absorption spectrometric method","authors":"Jean-Marie Bakhoum, O. Mbaye, J. Bakhoum, M. D. Gaye-Seye, Clément Trellu, Coly Atanasse, J. Aaron","doi":"10.20450/mjcce.2023.2750","DOIUrl":"https://doi.org/10.20450/mjcce.2023.2750","url":null,"abstract":"In this work, we developed an UV-visible (UV-VIS) absorption spectrometric method for the quantification of sodium diclofenac in natural waters. Several UV-VIS absorption method parameters were optimized. The maximum absorption wavelength was comprised between 276 and 292 nm, depending on the solvent, with molar absorption coefficients greater than 104 L mol-1 cm-1. The linearity of the UV-VIS calibration curves extended over one to three orders of magnitude, with correlation coefficients (R2) very close to unity. The low relative standard deviation (RSD)  values indicated a good reproducibility of the measurements. Analytical applications to natural waters yielded satisfactory results with average recovery rates between 94.7 and 99.1%.","PeriodicalId":18088,"journal":{"name":"Macedonian Journal of Chemistry and Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139161142","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}

{"title":"Eco-friendly RP-HPLC method for determination of diazepam in coated tablet","authors":"Marija Tomić, Marijana Božinovska, Nataša Anevska-Stojanovska, Jelena Lazova, R. Petkovska, L. Anastasova, N. Nakov","doi":"10.20450/mjcce.2023.2683","DOIUrl":"https://doi.org/10.20450/mjcce.2023.2683","url":null,"abstract":"A new eco-friendly RP-HPLC method for determining diazepam in coated tablets was developed and validated. The separation was achieved on a Lichrosper® 100 RP-18 (250 mm × 4 mm, 5 µm particle size) using the isocratic elution mode with a mobile phase composed of a mixture of water (H2O) and ethanol (EtOH) in a 40:60 (v/v %) ratio and a flow rate of 1.0 mL/min. The injection volume was 10 μL, and the detection wavelength was set at 254 nm. The column temperature was maintained at 35 ºC. The method was validated according to the ICH guideline, emphasizing selectivity/specificity, linearity, sensitivity, accuracy, precision, and robustness. The analytical method greenness score and Eco-scale approach were used for the method’s greenness assessment. The method was applied to determine the assay of diazepam in coated tablets and the uniformity of dosage units by content uniformity. Applying the method proposed in this study in the pharmaceutical industry is considered environmentally sustainable. It would bring benefits in terms of a safer working environment and reduction of toxic waste formation without compromising the reliability of the analytical results.","PeriodicalId":18088,"journal":{"name":"Macedonian Journal of Chemistry and Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139160331","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}

{"title":"Microwave synthesis of novel chenodeoxycholic acid esters and comparative study of chromatographic behavior and lipophilicity","authors":"Ksenija Pavlović, Ljubica M Grbović, Milica Ž. Karadžić Banjac, Strahinja Z. Kovačević, A. Mandic, S. Podunavac-Kuzmanovic, Bojana R. Vasiljević","doi":"10.20450/mjcce.2023.2707","DOIUrl":"https://doi.org/10.20450/mjcce.2023.2707","url":null,"abstract":"In this study, eco-friendly microwave-assisted esterification reactions of chenodeoxycholic acid with medium-chain diols (1,2-ethanediol, 1,4-butanediol, 1,6-hexanediol, 1,8-octanediol, and 1,10-decanediol) or tetraethylene glycol were accomplished. The synthesized bile acid esters were obtained with high yields (up to 81 %) and purity in a short reaction time (15 min). It is shown that the microwave technique is a suitable method for the preparation of chenodeoxycholic acid esters. In order to obtain detailed insight into the lipophilic behavior of the studied chenodeoxycholic acid esters, a comparative study of chromatographic behavior and lipophilicity was performed. Also, the present study deals with the estimation of pH – logD profiles in order to get an overview of the changes in lipophilicity related to the pH value changes. The obtained results indicate that studied compounds have logD values in the range acceptable for potential drug candidates. Chromatographic lipophilicity of synthesized chenodeoxycholic acid esters successfully correlate with in silico lipophilicity descriptors.","PeriodicalId":18088,"journal":{"name":"Macedonian Journal of Chemistry and Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139160191","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}

{"title":"Voltammetric biosensors based on metallic nanoparticles synthesized from plant extracts: A short overview of recent achievements","authors":"R. Gulaboski, Sanja Lazarova, Pavlinka Kokoskarova, Elena Joveva","doi":"10.20450/mjcce.2023.2786","DOIUrl":"https://doi.org/10.20450/mjcce.2023.2786","url":null,"abstract":"Since the last decade of the 20th century, many scientific disciplines have heavily relied on materials with nanometer dimensions. Nanomaterials are already integrated into numerous biomedical and pharmaceutical applications, including the delivery of active substances to specific targets within the body. This has been demonstrated by their contribution to the containment of the recent COVID-19 pandemic. Graphene, silver, gold, and other nanoparticles possess exceptional physical and chemical properties, including increased thermal stability, improved conductivity, and the capacity to host various organic substrates on their surface area. In the past 20 years, a significant field of nanoparticle synthesis has emerged, where eco-friendly reducing agents found in numerous plant species are used. This brief review focuses on the outstanding performance of metallic nanoparticles synthesized using \"green methods\" in designing voltammetric biosensors. The major goal of this short review is to highlight some of the latest electrochemical advances in exploring metallic nano-systems obtained via phytosynthesis from plant extracts, covering the most notable achievements in the design of amperometric and voltammetric biosensors.","PeriodicalId":18088,"journal":{"name":"Macedonian Journal of Chemistry and Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139160308","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}