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Synthesis, structure and capacitive properties of cobalt hydroxide films on stainless steel substrates 不锈钢基板上氢氧化钴薄膜的合成、结构和电容性能
Central European Journal of Chemistry Pub Date : 2014-05-15 DOI: 10.2478/s11532-014-0570-y
I. Barauskienė, E. Valatka
{"title":"Synthesis, structure and capacitive properties of cobalt hydroxide films on stainless steel substrates","authors":"I. Barauskienė, E. Valatka","doi":"10.2478/s11532-014-0570-y","DOIUrl":"https://doi.org/10.2478/s11532-014-0570-y","url":null,"abstract":"AbstractCobalt (hydro)oxide films on AISI 304 stainless steel and sintered metal fibre filter Bekipor ST 20AL3 were prepared using electrochemical deposition from neutral cobalt acetate solutions under galvanostatic conditions. Deposited films were structurally characterized using X-ray diffraction, Fourier transform infrared spectroscopy and scanning electron microscopy. All electrochemical measurements were performed in aqueous NaOH solution. Capacitive behavior of different films was evaluated using cyclic voltammetry data. The highest specific capacitance (965 F g−1) was reached when Bekipor ST 20AL3 mesh was used as a support for electroactive substance.\u0000","PeriodicalId":9888,"journal":{"name":"Central European Journal of Chemistry","volume":"114 1","pages":"1206-1211"},"PeriodicalIF":0.0,"publicationDate":"2014-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88000824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Crystallographic and structural characterization of heterometallic platinum complexes Part VI. Heterohexanuclear complexes 异金属铂配合物的晶体学和结构表征。第六部分。杂六核配合物
Central European Journal of Chemistry Pub Date : 2014-05-15 DOI: 10.2478/s11532-014-0558-7
M. Melnik, P. Mikuš, C. Holloway
{"title":"Crystallographic and structural characterization of heterometallic platinum complexes Part VI. Heterohexanuclear complexes","authors":"M. Melnik, P. Mikuš, C. Holloway","doi":"10.2478/s11532-014-0558-7","DOIUrl":"https://doi.org/10.2478/s11532-014-0558-7","url":null,"abstract":"AbstractThis review classifies and analyzes heterohexanuclear platinum clusters into seven types of metal combinations:Pt5M, Pt4M2, Pt3M3, Pt2M4, PtM5, Pt2M3M′, and Pt2M2M2′. The crystals of these clusters generally belong to six crystal classes: monoclinic, triclinic, orthorhombic, tetragonal, trigonal and cubic. Among the wide range of stereochemistry adopted by these clusters, octahedral and capped square-pyramidal are the most common. Although platinum is classified as a soft metal atom, it bonds to a variety of soft, borderline and hard metals. Nineteen different heterometal ions are involved in hexanuclear platinum clusters. The shortest Pt-M bond distance in the case of M being a non-transition element is 2.395(4) Å for germanium and for M being a transition metal ion it is 2.402(2) Å for Cobalt. The shortest Pt-Pt bond distance observed in these clusters is 2.532 Å. Several relationships between the structural parameters are identified and discussed. Some clusters exist in two isomeric forms and some show crystallographically independent molecules within the same crystal. Such isomers and independent molecules are examples of distortion isomerism.\u0000","PeriodicalId":9888,"journal":{"name":"Central European Journal of Chemistry","volume":"3 1","pages":"1101-1126"},"PeriodicalIF":0.0,"publicationDate":"2014-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80241732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Biodegradation of Benzo[a]Pyrene through the use of algae 利用藻类降解苯并[a]芘
Central European Journal of Chemistry Pub Date : 2014-05-15 DOI: 10.2478/s11532-014-0567-6
A. Takáčová, M. Smolinská, J. Ryba, T. Mackuľak, Jana Jokrllová, P. Hronec, G. Čík
{"title":"Biodegradation of Benzo[a]Pyrene through the use of algae","authors":"A. Takáčová, M. Smolinská, J. Ryba, T. Mackuľak, Jana Jokrllová, P. Hronec, G. Čík","doi":"10.2478/s11532-014-0567-6","DOIUrl":"https://doi.org/10.2478/s11532-014-0567-6","url":null,"abstract":"AbstractIn this work for disposal of the biologically hard decomposed pollutant Benzo[a]Pyrene (BaP) photooxidation Chlorella kessleri was used. The simulation model system under the different experimental conditions (varying biomass and light intensity) was evaluated. For quantitative analysis of the decrease in BaP, GC/MS technique was used. The highest degradation efficiency was achieved in the case of biomass from the culture of live algae (29%) and light intensity at level of 13.5 W m−2. When the dry biomass was used, degradation under the same conditions was lower because of lack of enzymatic activity in the system.\u0000","PeriodicalId":9888,"journal":{"name":"Central European Journal of Chemistry","volume":"44 1","pages":"1133-1143"},"PeriodicalIF":0.0,"publicationDate":"2014-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77229786","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 33
Determination of 210Po content of vietnamese tobacco samples 越南烟草样品中210Po含量的测定
Central European Journal of Chemistry Pub Date : 2014-05-15 DOI: 10.2478/s11532-014-0569-4
T. Kovács, M. Horváth, Z. Sas, B. D. Dung, Tran Khanh Minh
{"title":"Determination of 210Po content of vietnamese tobacco samples","authors":"T. Kovács, M. Horváth, Z. Sas, B. D. Dung, Tran Khanh Minh","doi":"10.2478/s11532-014-0569-4","DOIUrl":"https://doi.org/10.2478/s11532-014-0569-4","url":null,"abstract":"Smoking is one of the leading causes of preventable death. In recent years, numerous countries have initiated the prohibition of smoking in restaurants, workplaces and public spaces. The Vietnamese government intends to follow the precautions against public smoking as well. Over and above the number of some hazardous chemical components found in tobacco, 210Po isotope content could enhance the probability of the development of lung cancer. In this study 14 Vietnamese tobacco products (commercial cigarettes and pipe tobacco) 210Po activity concentration were determined using PIPS semiconductor alpha spectrometry. The results showed that the 210Po activity concentration of the investigated samples varied between 7.40 ± 1.09–128.64 ± 11.22 mBq g−1. The average 210Po content of commercial cigarettes was 15.5 mBq g−1, whilst the average of pipe tobacco was 20.4 mBq g−1. To estimate the risk of inhalation of 210Po isotopes originating as a result of smoking, dose estimations were carried out.","PeriodicalId":9888,"journal":{"name":"Central European Journal of Chemistry","volume":"82 1","pages":"1127-1132"},"PeriodicalIF":0.0,"publicationDate":"2014-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91244098","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Syngas production by biogas reforming over the Co-based multicomponent catalysts 基于co基多组分催化剂的沼气重整制合成气
Central European Journal of Chemistry Pub Date : 2014-05-12 DOI: 10.2478/s11532-014-0571-x
S. Itkulova, G. D. Zakumbaeva, A. Mukazhanova, Y. Y. Nurmakanov
{"title":"Syngas production by biogas reforming over the Co-based multicomponent catalysts","authors":"S. Itkulova, G. D. Zakumbaeva, A. Mukazhanova, Y. Y. Nurmakanov","doi":"10.2478/s11532-014-0571-x","DOIUrl":"https://doi.org/10.2478/s11532-014-0571-x","url":null,"abstract":"The new multicomponent Co-based catalysts with additives of group 8 metal and rare earth elements and supported on alumina have been tested in the dry and steam conversion of a model biogas. The processes were carried out in a flow quartz reactor under the following conditions: atmospheric pressure, a gas hourly space velocity of 1000 h−1 and temperatures of 300–800°C. The catalysts were characterised using electron microscopy, BET and X-ray analysis.The methane is almost completely converted in the dry reforming of biogas at T≤800°C. Synthesis gas with a ratio of H2/CO>1.0 is a main product of biogas reforming over the multicomponent catalysts studied. Adding steam in a feed composition increases both the methane conversion and the hydrogen yield at lower temperatures. Almost complete methane conversion occurs at T<750°C in the steam reforming of biogas. The catalysts are highly effective and exhibit stable activity throughout 100 h of continuous testing.","PeriodicalId":9888,"journal":{"name":"Central European Journal of Chemistry","volume":"33 1","pages":"1255-1261"},"PeriodicalIF":0.0,"publicationDate":"2014-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75561605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Chemical and technological characterization of medieval glass bracelets from South-East Bulgaria 保加利亚东南部中世纪玻璃手镯的化学和技术特征
Central European Journal of Chemistry Pub Date : 2014-05-06 DOI: 10.2478/s11532-014-0560-0
R. Georgieva, A. Detcheva, Y. Dimitriev
{"title":"Chemical and technological characterization of medieval glass bracelets from South-East Bulgaria","authors":"R. Georgieva, A. Detcheva, Y. Dimitriev","doi":"10.2478/s11532-014-0560-0","DOIUrl":"https://doi.org/10.2478/s11532-014-0560-0","url":null,"abstract":"AbstractThe present paper deals with chemical and physicochemical characterization of seven glass fragments of medieval glass bracelets from South-East Bulgaria. Samples were investigated by Fourier-transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM) and differential thermal analysis (DTA). Gravimetric chemical analysis was used for silica assessment. Flame photometry was applied to determine sodium and potassium content while aluminium, calcium and magnesium were determined by flame atomic absorption spectrometry after dissolution using a mixture of acids. All investigated artefacts are soda-lime-silica glasses and when produced two different recipe norms were used. Important technological parameters of glass manufacturing were determined and discussed. This investigation throws light on the technological development and production of glass during medieval times.\u0000","PeriodicalId":9888,"journal":{"name":"Central European Journal of Chemistry","volume":"11 1","pages":"1169-1175"},"PeriodicalIF":0.0,"publicationDate":"2014-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89776666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Metals content of soil, leaves and wild fruit from Serbia 塞尔维亚土壤、树叶和野果的金属含量
Central European Journal of Chemistry Pub Date : 2014-05-06 DOI: 10.2478/s11532-014-0566-7
S. Randjelovic, D. Kostić, G. Stojanović, S. Mitić, M. Mitić, B. Arsić, A. Pavlović
{"title":"Metals content of soil, leaves and wild fruit from Serbia","authors":"S. Randjelovic, D. Kostić, G. Stojanović, S. Mitić, M. Mitić, B. Arsić, A. Pavlović","doi":"10.2478/s11532-014-0566-7","DOIUrl":"https://doi.org/10.2478/s11532-014-0566-7","url":null,"abstract":"AbstractThe concentrations of Zn, Mn, Fe, Pb, Ni, Cu and Cd in soil, leaves and edible wild fruit (Crataegus laevigata L., Cornus mas L. and Prunus spinosa L.) from southeast Serbia were determined by atomic absorption spectroscopy. Metal translocations from soil to fruit were calculated as well as their oral intake and health risk indices. Positive correlations were found among metal concentrations in soil, leaves and fruit.\u0000","PeriodicalId":9888,"journal":{"name":"Central European Journal of Chemistry","volume":"14 1","pages":"1144-1151"},"PeriodicalIF":0.0,"publicationDate":"2014-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87524506","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
Aerobic oxidation of cumene catalysed by 4-alkyloxycarbonyl-N-hydroxyphthalimide 4-烷基氧羰基- n -羟基邻苯二胺催化异丙苯的好氧氧化
Central European Journal of Chemistry Pub Date : 2014-05-06 DOI: 10.2478/s11532-014-0565-8
Kornela Kasperczyk, Beata Orlińska, J. Zawadiak
{"title":"Aerobic oxidation of cumene catalysed by 4-alkyloxycarbonyl-N-hydroxyphthalimide","authors":"Kornela Kasperczyk, Beata Orlińska, J. Zawadiak","doi":"10.2478/s11532-014-0565-8","DOIUrl":"https://doi.org/10.2478/s11532-014-0565-8","url":null,"abstract":"Abstract4-Hexyloxycarbonyl-, 4-dodecyloxycarbonyl- and 4-hexadecyloxycarbonyl-N-hydroxyphthalimides were synthesised using trimellitic anhydride chloride as the starting material. The obtained lipophilic derivatives of N-hydroxyphthalimide were applied as catalysts of the cumene oxidation reaction with oxygen performed in polar acetonitrile, in non-polar tert-butylbenzene and in the absence of a solvent. The courses of reactions catalysed by N-hydroxyphthalimide and its derivatives were compared.\u0000","PeriodicalId":9888,"journal":{"name":"Central European Journal of Chemistry","volume":"51 1","pages":"1176-1182"},"PeriodicalIF":0.0,"publicationDate":"2014-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78294765","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 39
Occurrence of 2-phenylphenol in food paper packages 食品纸包装中2-苯基酚的含量
Central European Journal of Chemistry Pub Date : 2014-05-06 DOI: 10.2478/s11532-014-0563-x
L. Votavová, K. Hanušová, Lukáš Vápenka, J. Dobiáš, F. Kvasnička
{"title":"Occurrence of 2-phenylphenol in food paper packages","authors":"L. Votavová, K. Hanušová, Lukáš Vápenka, J. Dobiáš, F. Kvasnička","doi":"10.2478/s11532-014-0563-x","DOIUrl":"https://doi.org/10.2478/s11532-014-0563-x","url":null,"abstract":"AbstractTwenty three paper based packaging materials commercially used for food packaging in the Czech Republic were analysed with regard to 2-phenylphenol (OPP) content using HPLC technique with fluorimetric detection. The HPLC method was modified with the aim to increase its sensitivity. OPP was detected in quantities ranging from 10 mg kg−1 to 527 mg kg−1 in twenty tested samples. The level of OPP in packaging materials was in close correlation to the content of recycled pulp in used paper material. The migration of OPP from two packaging materials comprised of paperboard coated with low density polyethylene (LDPE) into food simulants was determined at 40°C for 10 days. The levels of migration into 3% acetic acid, 10% ethanol and olive oil were below the limit of detection of used analytical procedure. In the case of 95% ethanol, 13% and 21% of OPP present in tested samples were transferred into simulant. The found occurrence of OPP in paper packages does not pose any significant safety risk for food consumer, but OPP could be considered as wide spread contaminant in paper materials.\u0000","PeriodicalId":9888,"journal":{"name":"Central European Journal of Chemistry","volume":"61 1","pages":"1162-1168"},"PeriodicalIF":0.0,"publicationDate":"2014-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77469867","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
DNA molecules site-specific immobilization and their applications DNA分子定点固定及其应用
Central European Journal of Chemistry Pub Date : 2014-05-06 DOI: 10.2478/s11532-014-0557-8
Xiaoning Zhang, Hongmei Hu
{"title":"DNA molecules site-specific immobilization and their applications","authors":"Xiaoning Zhang, Hongmei Hu","doi":"10.2478/s11532-014-0557-8","DOIUrl":"https://doi.org/10.2478/s11532-014-0557-8","url":null,"abstract":"AbstractIn addition to its role as a carrier of genetic information, DNA has been recognized as a construction material for the assembly of different objects and structural arrangements with nanoscale features. As a result of DNA’s self-recognition properties (based on the specific base-pairing of G-C and T-A), monolayer films of nucleic acids on solid supports have attracted an escalating attentions. Recently, numerous novel materials based on two-dimensional (2D) and three-dimensional (3D) DNA structures have been reported, which extends their utility to a large number of appliations. This review paper intends to be a new and comprehensive overview of recent strategies to site-specifically immobilized DNA on various materials, including carbonaceous substances, gold, and silica substrate, emphasizing the applications of site-specific DNA nanostructure-based devices for diagnostic, bioanalytical, food safety and environmental monitoring. Additionally, an up-to-date perspective is proposed at the end of this review.\u0000","PeriodicalId":9888,"journal":{"name":"Central European Journal of Chemistry","volume":"139-140 1","pages":"977-993"},"PeriodicalIF":0.0,"publicationDate":"2014-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79149321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
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