发布求助
文献互助 智能选刊 最新文献

Croatica Chemica Acta最新文献

筛选
英文 中文
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
Crystal structure of S-adenosyl-L-homocysteine hydrolase from Cytophaga hutchinsonii in complex with adenosine 哈氏细胞噬菌s -腺苷- l-同型半胱氨酸水解酶与腺苷复合物的晶体结构
IF 0.3 4区 化学
Croatica Chemica Acta Pub Date : 2018-06-04 DOI: 10.2210/PDB6GBN/PDB
J. Czyrko, M. Jaskólski, K. Brzezinski
{"title":"Crystal structure of S-adenosyl-L-homocysteine hydrolase from Cytophaga hutchinsonii in complex with adenosine","authors":"J. Czyrko, M. Jaskólski, K. Brzezinski","doi":"10.2210/PDB6GBN/PDB","DOIUrl":"https://doi.org/10.2210/PDB6GBN/PDB","url":null,"abstract":"","PeriodicalId":10822,"journal":{"name":"Croatica Chemica Acta","volume":"91 1","pages":"153-162"},"PeriodicalIF":0.3,"publicationDate":"2018-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68199685","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
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
Non-canonical Structures in Promoter Modulate Gene Expression in Escherichia coli 启动子调控基因在大肠杆菌中表达的非规范结构
IF 0.3 4区 化学
Croatica Chemica Acta Pub Date : 2018-06-04 DOI: 10.5562/cca3349
Sabina Božič Abram, M. Marušič, M. Živkovič, J. Brčić, J. Plavec
{"title":"Non-canonical Structures in Promoter Modulate Gene Expression in Escherichia coli","authors":"Sabina Božič Abram, M. Marušič, M. Živkovič, J. Brčić, J. Plavec","doi":"10.5562/cca3349","DOIUrl":"https://doi.org/10.5562/cca3349","url":null,"abstract":"Herein we show how sequences that can form different non-canonical structures affect gene expression levels when inserted in the core of σ70-dependent promoter, between the −35 and −10 elements recognized by RNA polymerase, in E. coli. We note that influence on level of GFP expression varies considerably depending on introduction of non-canonical structural elements in the antisense and sense strands as well as with their propensities to form G-triplex, G-hairpin, hairpin or G-quadruplex structures. Moreover, the extent of repression of expression does not relate to the in vitro thermal stability in a simple manner. Repression is most likely caused by steric interference rather than improper distance between the −35 and −10 elements. Although properties like thermal stability and topology can be somewhat different under in vivo and in vitro conditions, our results suggest that the extent of expression suppression cannot be dependent solely on thermal stabilities of Grich structures alone.","PeriodicalId":10822,"journal":{"name":"Croatica Chemica Acta","volume":"91 1","pages":"163-170"},"PeriodicalIF":0.3,"publicationDate":"2018-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49361033","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
Aggregation in Three Benzamide or Pyridylcarboxamide Hydrates: Formation of 1D Chains Comprising Water Molecules in a Chloro(pyridyl)benzamide Dihydrate 三种苯甲酰胺或吡啶甲酰胺水合物中的聚集：氯（吡啶基）苯甲酰胺二水合物中包含水分子的1D链的形成
IF 0.3 4区 化学
Croatica Chemica Acta Pub Date : 2018-06-04 DOI: 10.5562/CCA3347
P. Mocilac, J. Gallagher, C. Jelsch
{"title":"Aggregation in Three Benzamide or Pyridylcarboxamide Hydrates: Formation of 1D Chains Comprising Water Molecules in a Chloro(pyridyl)benzamide Dihydrate","authors":"P. Mocilac, J. Gallagher, C. Jelsch","doi":"10.5562/CCA3347","DOIUrl":"https://doi.org/10.5562/CCA3347","url":null,"abstract":"Three benzamide hydrated derivatives as para-methyl-N-(3-pyridyl)benzamide monohydrate (I) or Mpm ∙ H2O; N-(3-fluorophenyl)-4pyridylcarboxamide monohydrate (II) or NpmF ∙ H2O and para-chloro-N-(3-pyridyl)benzamide dihydrate (III) or Clpm ∙ 2H2O are obtained from a series of crystallization experiments using a range of solvents to obtain polymorphs and solvates (hydrates). Most of the crystallization experiment attempts did not provide hydrates and yielded the starting parent crystalline materials. However, from the experiments, two benzamides, Mpm as a monohydrate and Clpm as a dihydrate were isolated and together with a carboxamide monohydrate as NpmF ∙ H2O are reported herein. The water molecules play a key role in crystal structure formation using classical hydrogen bonding via amide N–H∙∙∙OH2, O– H∙∙∙Npyridine and O–H∙∙∙O=C interactions. They compensate for the excess of strong hydrogen bonding acceptors over donors in the benzamide/pyridinecarboxamide molecules, by participating as O-H hydrogen bond donors twice and usually as an O acceptor once. In the Clpm dihydrate, both water molecules form hydrogen bonded chains along the a-axis direction. The lack of hydrate formation in the majority of related benzamides is presumably related to the relative hydrophobicity of these compounds.","PeriodicalId":10822,"journal":{"name":"Croatica Chemica Acta","volume":"91 1","pages":"281-288"},"PeriodicalIF":0.3,"publicationDate":"2018-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.5562/CCA3347","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45613352","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
A Historical Perspective on Crystallography in Croatia and the Career of Biserka Kojić-Prodić from the Viewpoint of the CSD 从CSD的角度看克罗地亚晶体学和比塞卡的职业生涯Kojić-Prodić
IF 0.3 4区 化学
Croatica Chemica Acta Pub Date : 2018-06-04 DOI: 10.5562/CCA3342
P. Wood, Clare A Tovee, Andrew G. P. Maloney, S. Ward
{"title":"A Historical Perspective on Crystallography in Croatia and the Career of Biserka Kojić-Prodić from the Viewpoint of the CSD","authors":"P. Wood, Clare A Tovee, Andrew G. P. Maloney, S. Ward","doi":"10.5562/CCA3342","DOIUrl":"https://doi.org/10.5562/CCA3342","url":null,"abstract":"There is a long history of chemical crystallography and use of the Cambridge Structural Database (CSD) in Croatia, which dates back to 1985 when the CSD first became accessible there thanks to the efforts of Biserka Kojić-Prodić as head of the National Affiliated Centre. On the occasion of Dr Kojić-Prodić’s 80th birthday we take the opportunity to look back at the history of crystallography in Croatia, and particularly in Biserka’s career, from the point of view of the CSD. Biserka has been a prolific author and contributor of crystal structures over the years sharing over 400 structures and collaborating with over 270 different co-authors on a wide range of different types of structure.","PeriodicalId":10822,"journal":{"name":"Croatica Chemica Acta","volume":"91 1","pages":"149-152"},"PeriodicalIF":0.3,"publicationDate":"2018-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47546941","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
The Role of Phosphate Binding in Purine Nucleoside Phosphorylase of Helicobacter pylori 磷酸结合在幽门螺杆菌嘌呤核苷磷酸化酶中的作用
IF 0.3 4区 化学
Croatica Chemica Acta Pub Date : 2018-06-04 DOI: 10.5562/CCA3335
Marta Bošnjaković, Ivana Leščić Ašler, Z. Štefanić
{"title":"The Role of Phosphate Binding in Purine Nucleoside Phosphorylase of Helicobacter pylori","authors":"Marta Bošnjaković, Ivana Leščić Ašler, Z. Štefanić","doi":"10.5562/CCA3335","DOIUrl":"https://doi.org/10.5562/CCA3335","url":null,"abstract":"Purine nucleoside phosphorylase (PNP) is an essential enzyme in the purine salvage pathway of Helicobacter pylori. Since H. pylori lacks the ability to synthesize purine nucleosides de novo, inhibition of this enzyme could stop the growth of this bacterium. However, for the design of successful inhibitors the details of the mechanism of this enzyme should be fully understood. PNPs catalyze cleavage of the glycosidic bond of purine nucleosides, and phosphate is one of the substrates. It is thought that binding of phosphate induces the conformational change as a necessary initial step in the catalysis. This conformational change is manifested in closing of either one of the six active sites in the homohexameric PNPs. It is unclear whether the binding of phosphate is sufficient or just a necessary condition for the closing of the active site. In this paper we conducted an experiment to check this by soaking the crystals of the apo form of the enzyme in increasing concentrations of phosphate.","PeriodicalId":10822,"journal":{"name":"Croatica Chemica Acta","volume":"91 1","pages":"171-175"},"PeriodicalIF":0.3,"publicationDate":"2018-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49079381","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
Identification of stable and enantioselective lipases for biotechnological applications 生物技术应用中稳定和对映选择性脂肪酶的鉴定
IF 0.3 4区 化学
Croatica Chemica Acta Pub Date : 2018-06-04 DOI: 10.5562/CCA3357
K. Jaeger, Alexander Fulton, U. Schwaneberg, J. Pietruszka, F. Kovačić
{"title":"Identification of stable and enantioselective lipases for biotechnological applications","authors":"K. Jaeger, Alexander Fulton, U. Schwaneberg, J. Pietruszka, F. Kovačić","doi":"10.5562/CCA3357","DOIUrl":"https://doi.org/10.5562/CCA3357","url":null,"abstract":"s are used yielding libraries and enantioselective lipases stable under industrially relevant : lipases, screening, biotechnology, stability, enantioselectivity, enzyme assays, high throughput What Should be Considered During Planning Enzyme Screening Projects? CREENING methods for identification of enzymes with desired properties are important in biotechnology. These methods rely on the simultaneous analysis of a large number of samples defined as throughput, which can vary from medium (ca. 10","PeriodicalId":10822,"journal":{"name":"Croatica Chemica Acta","volume":"91 1","pages":"249-253"},"PeriodicalIF":0.3,"publicationDate":"2018-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44083750","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
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信