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Impact of anticoagulants on assessment of zinc in plasma 抗凝剂对血浆锌评估的影响
IF 0.3 4区 化学
Croatica Chemica Acta Pub Date : 2018-12-29 DOI: 10.5562/CCA3321
J. Jablan, M. Rajković, S. Inić, R. Petlevski, A. Domijan
{"title":"Impact of anticoagulants on assessment of zinc in plasma","authors":"J. Jablan, M. Rajković, S. Inić, R. Petlevski, A. Domijan","doi":"10.5562/CCA3321","DOIUrl":"https://doi.org/10.5562/CCA3321","url":null,"abstract":"The aim of this study was to compare zinc (Zn) level in EDTA, heparin, citrate plasma and serum. The blood samples from the same healthy volunteers (n","PeriodicalId":10822,"journal":{"name":"Croatica Chemica Acta","volume":"91 1","pages":"317-321"},"PeriodicalIF":0.3,"publicationDate":"2018-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.5562/CCA3321","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48570033","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
Synthesis and Pharmacological Evaluation of Pyrazoline and Pyrimidine Analogs of Combretastatin-A4 as Anticancer, Anti-inflammatory and Antioxidant Agents 康布他汀- a4的吡唑啉和嘧啶类似物抗癌、抗炎和抗氧化的合成及药理评价
IF 0.3 4区 化学
Croatica Chemica Acta Pub Date : 2018-12-29 DOI: 10.5562/CCA3393
Sadanand N. Shringare, H. Chavan, Pravin S. Bhale, Sakharam B. Dongare, Yoginath B. Mule, Nishikant D. Kolekar, B. Bandgar
{"title":"Synthesis and Pharmacological Evaluation of Pyrazoline and Pyrimidine Analogs of Combretastatin-A4 as Anticancer, Anti-inflammatory and Antioxidant Agents","authors":"Sadanand N. Shringare, H. Chavan, Pravin S. Bhale, Sakharam B. Dongare, Yoginath B. Mule, Nishikant D. Kolekar, B. Bandgar","doi":"10.5562/CCA3393","DOIUrl":"https://doi.org/10.5562/CCA3393","url":null,"abstract":"","PeriodicalId":10822,"journal":{"name":"Croatica Chemica Acta","volume":"91 1","pages":"357-366"},"PeriodicalIF":0.3,"publicationDate":"2018-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45272596","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: 7
Influence of Titanium Dioxide Preparation Method on Photocatalytic Degradation of Organic Dyes 二氧化钛制备方法对有机染料光催化降解的影响
IF 0.3 4区 化学
Croatica Chemica Acta Pub Date : 2018-12-29 DOI: 10.5562/CCA3292
V. Gilja, L. K. Krehula, Z. Katančić, S. Krehula, Z. Hrnjak-Murgić, J. Travas-sejdic
{"title":"Influence of Titanium Dioxide Preparation Method on Photocatalytic Degradation of Organic Dyes","authors":"V. Gilja, L. K. Krehula, Z. Katančić, S. Krehula, Z. Hrnjak-Murgić, J. Travas-sejdic","doi":"10.5562/CCA3292","DOIUrl":"https://doi.org/10.5562/CCA3292","url":null,"abstract":"Titanium catalysts (TiO2) were synthesized by three different methods. Their photocatalytic activity was validated through photodegradation of Reactive Red 45 (RR45) azo dye and Acid Blue 25 (AB25) anthraquinone dye in an aqueous solution under UV irradiation. TiO2 photocatalysts were characterized by FTIR, XRD and SEM. Photosensitivity and TiO2 activity range were characterized by UV/Vis spectroscopy. Photocatalytic validation has been made by way of determining the degree of RR45 and AB25 removal. TOC was determined as a measure of the mineralization of RR45 and AB25 by photocatalysis. The stability of TiO2 catalysts and a possibility of using them in consecutive photocatalysis cycles have also been studied. The results show that the photocatalytic efficiency depends on the crystal structure of TiO2. The size of crystallites depends on synthesis conditions. From the results of photocatalytic efficiency it is concluded that the chemical interaction between a catalyst and a dye strongly depends on the dye chemical structure.","PeriodicalId":10822,"journal":{"name":"Croatica Chemica Acta","volume":"91 1","pages":"323-334"},"PeriodicalIF":0.3,"publicationDate":"2018-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.5562/CCA3292","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46408366","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
Monitoring of the Forced Hydrolysis of FeCl3 Solutions in the Presence of Sodium Dodecyl Sulphate 十二烷基硫酸钠存在下FeCl3溶液强制水解的监测
IF 0.3 4区 化学
Croatica Chemica Acta Pub Date : 2018-12-29 DOI: 10.5562/CCA3412
M. Ristić, Jasenka Štajdohar, Ivana Mitar, S. Musić
{"title":"Monitoring of the Forced Hydrolysis of FeCl3 Solutions in the Presence of Sodium Dodecyl Sulphate","authors":"M. Ristić, Jasenka Štajdohar, Ivana Mitar, S. Musić","doi":"10.5562/CCA3412","DOIUrl":"https://doi.org/10.5562/CCA3412","url":null,"abstract":"Precipitations by the forced hydrolysis of 0.2 M FeCl3 aqueous solutions between 2 and 72 hours in the presence of 1% sodium n-dodecyl sulphate (SDS) were investigated. In the absence of SDS a direct phase transformation b- FeOOH → a-Fe2O3 via dissolution/ recrystallization occurred in the precipitation system. In the presence of SDS small amounts (traces) of a-FeOOH as an intermediate phase precipitated, and with a prolonged time of forced hydrolysis a-FeOOH also transformed to a-Fe2O3 via the dissolution/recrystallization mechanism. On the basis of Mossbauer spectra it was concluded that in the presence of SDS the a-Fe2O3 phase exhibited a lower degree of crystallinity. During the precipitation process in the presence of SDS the competition between the stability of Fe(III)-dodecyl sulphate on one side and the formation of iron oxide phases on the other also played an important role. Thermal field emission scanning electron microscopy (FE SEM) revealed that the big a- Fe2O3 particles possessed a substructure. The elongation of primary a-Fe2O3 particles produced in the presence of SDS was noticed. This effect can be assigned to the preferential adsorption of sulphate groups on nuclei and crystallites of FeOOH and a-Fe2O3 phases during the forced hydrolysis of FeCl3 solutions.","PeriodicalId":10822,"journal":{"name":"Croatica Chemica Acta","volume":"91 1","pages":"403-410"},"PeriodicalIF":0.3,"publicationDate":"2018-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44148323","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
Molecular Design of Sugar-Based Polyurethanes 糖基聚氨酯的分子设计
IF 0.3 4区 化学
Croatica Chemica Acta Pub Date : 2018-12-29 DOI: 10.5562/CCA3328
Min Lu, Attila Surányi, B. Viskolcz, Béla Fiser
{"title":"Molecular Design of Sugar-Based Polyurethanes","authors":"Min Lu, Attila Surányi, B. Viskolcz, Béla Fiser","doi":"10.5562/CCA3328","DOIUrl":"https://doi.org/10.5562/CCA3328","url":null,"abstract":"Polyurethane (PUs) are present in many aspects of everyday lives such as the rigid foam insulation panel in construction, seat cushion in automotive and elastomeric materials in medical industries. Conventional PUs are made from petrochemical based starting materials which raised severe health and environmental concerns. The substitution of petro-based polyols with carbohydrate polyols have shown to improve biodegradability and mechanical properties of PUs. Reaction pathways were examined with density functional theory to design novel environmental friendly polyurethanes. Based on the calculated thermodynamic properties, the reactivity of sugars towards isocyanates was compared. Fructose was found to be the most reactive as the corresponding fructose-isocyanate reaction has the lowest energy barrier of 135.6 kJ/mol. Therefore, the results obtained have encouraged the synthesis of fructose-based polyurethane foam. The synthesis was successful, and the produced fully fructose-based foam was stable with minimal sign of shrinkage.","PeriodicalId":10822,"journal":{"name":"Croatica Chemica Acta","volume":"91 1","pages":"299-307"},"PeriodicalIF":0.3,"publicationDate":"2018-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.5562/CCA3328","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46846926","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: 10
Time-Independent Methodology to Access Michaelis-Menten Constant by Exploring Electrochemical-Catalytic Mechanism in Protein-Film Cyclic Staircase Voltammetry 通过探索蛋白质膜循环阶梯伏安法的电化学催化机理获得米氏常数的时间无关方法
IF 0.3 4区 化学
Croatica Chemica Acta Pub Date : 2018-12-29 DOI: 10.5562/CCA3383
R. Gulaboski, Pavlinka Kokoskarova, Sofija Petkovska
{"title":"Time-Independent Methodology to Access Michaelis-Menten Constant by Exploring Electrochemical-Catalytic Mechanism in Protein-Film Cyclic Staircase Voltammetry","authors":"R. Gulaboski, Pavlinka Kokoskarova, Sofija Petkovska","doi":"10.5562/CCA3383","DOIUrl":"https://doi.org/10.5562/CCA3383","url":null,"abstract":": Protein-film voltammetry is recognized as a very efficient tool in mechanistic enzymology, but it is also seen as a relevant approach to gain thermodynamic and kinetic information related to the redox chemistry of many enzymes. This technique requires a small amount of redox enzyme, whose molecules form monomolecular film on the working electrode surface. In this paper we present a simple and time - independent cyclo-voltammetric method for the determination of kinetics of the chemical step of an electrochemical-catalytic (EC’) mechanism in protein- film scenario. Theoretical results of a surface EC’ mechanism show that the limiting cyclo -voltammetric catalytic current, measured at large overpotentials, depends solely on the rate of the chemical regenerative re action. At large overpotentials, the limiting current of the steady-state cyclic voltammograms is independent on all kinetics and thermodynamic parameters related to the electrode reaction of adsorbed enzyme. The approach proposed relies on the dependence of the magnitude of limiting current of the experimental cyclic steady-state voltammograms as a function of the substrate concentration.","PeriodicalId":10822,"journal":{"name":"Croatica Chemica Acta","volume":"91 1","pages":"377-382"},"PeriodicalIF":0.3,"publicationDate":"2018-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.5562/CCA3383","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45334963","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: 11
Order-Disorder in Diaquobis(salicylato)copper(II) Revisited 水杨酸铜的有序-无序(II)再访
IF 0.3 4区 化学
Croatica Chemica Acta Pub Date : 2018-06-28 DOI: 10.5562/cca3362
M. Lutz, Dai, Louiseinfoeu-repo Kroon Batenburg
{"title":"Order-Disorder in Diaquobis(salicylato)copper(II) Revisited","authors":"M. Lutz, Dai, Louiseinfoeu-repo Kroon Batenburg","doi":"10.5562/cca3362","DOIUrl":"https://doi.org/10.5562/cca3362","url":null,"abstract":"We re-investigated the crystal structure of diaquobis(salicylato)copper(II), CuSal, which is an OD material with disordered layer stacking. The diffraction pattern consists of sharp Bragg spots and diffuse streaks. From the Bragg reflections we determined the ordered part of the structure, which can either be described by an orthorhombic or a twinned monoclinic lattice. The main motif of the structure consists of one-dimensional coordination polymers that are connected by hydrogen bonds into two-dimensional layers. The layer stacking is disordered and from simulation","PeriodicalId":10822,"journal":{"name":"Croatica Chemica Acta","volume":"91 1","pages":"289-298"},"PeriodicalIF":0.3,"publicationDate":"2018-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45501861","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
Content of Bioactive Constituents and Antioxidant Potential of Galium L. Species Galium L.属植物的生物活性成分含量及抗氧化能力
IF 0.3 4区 化学
Croatica Chemica Acta Pub Date : 2018-06-05 DOI: 10.5562/CCA3379
Maja Friščić, Maja Štibrić Baglama, M. Milović, K. H. Pilepić, Ž. Maleš
{"title":"Content of Bioactive Constituents and Antioxidant Potential of Galium L. Species","authors":"Maja Friščić, Maja Štibrić Baglama, M. Milović, K. H. Pilepić, Ž. Maleš","doi":"10.5562/CCA3379","DOIUrl":"https://doi.org/10.5562/CCA3379","url":null,"abstract":"Qualitative phytochemical analyses of eight species from the genus Galium (G. corrudifolium, G. cruciata, G. divaricatum, G. lucidum, G. mollugo, G. palustre, G. parisiense, and G. verum), followed by spectrophotometric evaluation of their total phenolic, flavonoid and iridoid content, as well as antiradical capacity, were conducted. G. cruciata contained the greatest amount of total phenolics (111.00 mg gallic acid equivalents g–1 dry extract), while G. verum had the greatest amount of flavonoids (23.11 mg quercetin equivalents g–1 dry extract) and iridoids (461.30 mg aucubin equivalents g–1 dry extract). The best antioxidant (antiradical) activity was shown by G. cruciata (IC50 (ABTS) = 30.30 µg mL–1; IC50 (DPPH) = 27.62 µg mL–1), followed by G. divaricatum, G. verum and G. palustre. The same species were rich in various bioactive constituents and would be appropriate for inclusion in further investigations considering their biomedical potential. \u0000 This work is licensed under a Creative Commons Attribution 4.0 International License.","PeriodicalId":10822,"journal":{"name":"Croatica Chemica Acta","volume":"91 1","pages":"411-417"},"PeriodicalIF":0.3,"publicationDate":"2018-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.5562/CCA3379","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43023485","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: 6
Chalcone and Flavonol Copper(II) Complexes Containing Schiff Base Co-Ligand: Synthesis, Crystal Structures and Catecholase-like Activity 含席夫碱共配体的查尔酮和黄酮醇铜（II）配合物的合成、晶体结构和类儿茶酚酸酯活性
IF 0.3 4区 化学
Croatica Chemica Acta Pub Date : 2018-06-04 DOI: 10.5562/CCA3334
E. Kahrović, A. Zahirović, A. Višnjevac, Irnesa Osmanković, E. Turkušić, H. Kurtagić
{"title":"Chalcone and Flavonol Copper(II) Complexes Containing Schiff Base Co-Ligand: Synthesis, Crystal Structures and Catecholase-like Activity","authors":"E. Kahrović, A. Zahirović, A. Višnjevac, Irnesa Osmanković, E. Turkušić, H. Kurtagić","doi":"10.5562/CCA3334","DOIUrl":"https://doi.org/10.5562/CCA3334","url":null,"abstract":"Four new heteroleptic copper(II) complexes having chalcone or flavonol ligands and Schiff base (N-phenyl-5-chlorosalicylideneimine) as co-ligand were prepared, chemically and structurally characterized and investigated as functional biomimetic catecholase models. The complexes were prepared by the solution synthesis and crystal and molecular structures were determined by X-ray diffraction. Complexes were chemically characterized by elemental analysis, infrared and electronic absorption spectroscopy as well as by electrochemical measurements. Copper(II) chalcone complexes, with square-pyramidal CuO4N core, are binuclear, featuring phenolate oxygen from the Schiff base as a bridging atom, while copper(II) flavonol complexes are mononuclear, and reveal a square planar CuO3N coordination core. Catalytic activity of the complexes in 3, 5-di-tert-butylcatechol oxidation was confirmed by spectrophotometric and electrochemical measurements. Kinetic measurements revealed that the binuclear (chalcone-containing) complexes have enhanced catalytic activity as compared to the mononuclear Cu(II) flavonol complexes. Relatively high kcat values (300 – 750 h–1) confirmed their respectable biomimetic catecholase-like activity.","PeriodicalId":10822,"journal":{"name":"Croatica Chemica Acta","volume":"91 1","pages":"195-207"},"PeriodicalIF":0.3,"publicationDate":"2018-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49485699","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: 3
The Mechanism of Peptide Hydrolysis Catalysed by Dipeptidyl Peptidase III from Bacteroides thetaiotaomicron 拟杆菌二肽基肽酶III催化肽水解的机理
IF 0.3 4区 化学
Croatica Chemica Acta Pub Date : 2018-06-04 DOI: 10.5562/CCA3343
M. Tomin, A. Tomić, B. Kovačević, S. Tomić
{"title":"The Mechanism of Peptide Hydrolysis Catalysed by Dipeptidyl Peptidase III from Bacteroides thetaiotaomicron","authors":"M. Tomin, A. Tomić, B. Kovačević, S. Tomić","doi":"10.5562/CCA3343","DOIUrl":"https://doi.org/10.5562/CCA3343","url":null,"abstract":"Dipeptidyl peptidase III (DPP III) is a zinc- dependent peptidase that cleaves dipeptides off of N-termini of its substrates. Previous studies on human DPP III reveal a reaction mechanism similar to that of thermolysin. Since the active site is conserved within the DPP III family, it is not surprising that the mechanism determined for Bacteroides thetaiotaomicron DPP III (BtDPP III) closely resembles that of hDPP III. However, the hydrogen bond network within the model differs slightly from that in the human ortholog, which results in two proposed pathways. The calculated Gibbs activation energy of 90.1 kJ mol–1 is larger than the one calculated from kinetic data for the preferred substrate Arg2-2-naphthylamide at room temperature (69 kJ mol–1), suggesting the importance of treating the whole DPP III enzyme in the calculations.","PeriodicalId":10822,"journal":{"name":"Croatica Chemica Acta","volume":"91 1","pages":"187-193"},"PeriodicalIF":0.3,"publicationDate":"2018-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.5562/CCA3343","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43849482","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
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