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Nickel Release from Piercing Jewellery 从穿孔珠宝中释放镍
Srx Chemistry Pub Date : 2010-03-08 DOI: 10.3814/2010/769070
M. Pouzar, M. Schmidt, A. Krejčová, T. Černohorský
{"title":"Nickel Release from Piercing Jewellery","authors":"M. Pouzar, M. Schmidt, A. Krejčová, T. Černohorský","doi":"10.3814/2010/769070","DOIUrl":"https://doi.org/10.3814/2010/769070","url":null,"abstract":"The migration of nickel was studied for a set of twelve new units of piercing jewellery and eleven ones used for longer than one year. First, the surface of the samples was analysed using ED XRF and then samples were submerged into the artificial sweat solution for 168 hours at 30∘C. The resulting solutions were then analysed using ICP OES. A significant migration of nickel was found for four samples used, whereas only one of them was considered to exceed the migration limit given by CSN EN 1811","PeriodicalId":329389,"journal":{"name":"Srx Chemistry","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121418759","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: 2
Effect of Molecular Structure on the Phase Behavior of Ternary Mixtures Made from Unsymmetrical 1,4-Phenylene bis 4-Substituted Benzoates 分子结构对不对称1,4-苯基取代苯甲酸酯三元混合物相行为的影响
Srx Chemistry Pub Date : 2010-01-18 DOI: 10.3814/2010/534608
R. Nessim
{"title":"Effect of Molecular Structure on the Phase Behavior of Ternary Mixtures Made from Unsymmetrical 1,4-Phenylene bis 4-Substituted Benzoates","authors":"R. Nessim","doi":"10.3814/2010/534608","DOIUrl":"https://doi.org/10.3814/2010/534608","url":null,"abstract":"Ternary mixtures formed from components of the five series of unsymmetrical 1,4-phenylene bis-4-substituted benzoates (Ina--e), in which the substituent (X) alternatively changed from CH3O,CH3, Cl, NO2, and CN, respectively, while, within each homologous series, the length of the terminal alkoxy group varies between n=6, 8, or 14 carbons, were prepared and characterized for their mesophase behaviour. Transition temperatures of the mixtures prepared were measured by differential scanning calorimetry and the phases identified by polarized-light microscopy.","PeriodicalId":329389,"journal":{"name":"Srx Chemistry","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133588637","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
Chemical Synthesis, Electronic Study, and Vibrational Analysis of a New Organic Copolymer Based on PVK and 3-nhexylthiophene PVK - 3-己基噻吩有机共聚物的化学合成、电子研究及振动分析
Srx Chemistry Pub Date : 2010-01-18 DOI: 10.3814/2010/346843
Z. Malki, K. Hasnaoui, S. Bouzzine, L. Bejjit, M. Haddad, M. Hamidi, M. Bouachrine
{"title":"Chemical Synthesis, Electronic Study, and Vibrational Analysis of a New Organic Copolymer Based on PVK and 3-nhexylthiophene","authors":"Z. Malki, K. Hasnaoui, S. Bouzzine, L. Bejjit, M. Haddad, M. Hamidi, M. Bouachrine","doi":"10.3814/2010/346843","DOIUrl":"https://doi.org/10.3814/2010/346843","url":null,"abstract":"Conjugated polymers containing carbazole moieties either in the main or in the side chains have attracted much attention because of their unique electronic properties, to their high photoluminescence quantum efficiency, and thermal stability. The aim of this work is to study a new organic copolymer which combines the PVK properties and those of PHT. We will describe in this study the protocol synthesis, the chemical structure, and the electronic and vibrational properties of the resulting copolymer. The experimental and theoretical studies are combined in order to describe the properties of this material. These properties suggest this compound (PVK-PHT) to be a good candidate for optoelectronic application.","PeriodicalId":329389,"journal":{"name":"Srx Chemistry","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133152888","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: 0
Gold-dppm-Arylazoimidazole Complexes: Synthesis, Spectra, and Redox Study 金-dppm-芳唑咪唑配合物:合成、光谱及氧化还原研究
Srx Chemistry Pub Date : 1900-01-01 DOI: 10.3814/2010/424392
P. Byabartta
{"title":"Gold-dppm-Arylazoimidazole Complexes: Synthesis, Spectra, and Redox Study","authors":"P. Byabartta","doi":"10.3814/2010/424392","DOIUrl":"https://doi.org/10.3814/2010/424392","url":null,"abstract":"[Ag(tht)(OTf)]-assisted reaction produces [ Au III ( dppm ) ( tht ) 2 ] ( OSO 2 CF 3 ) 2 , reacts with R a a i R ′ in dichloromethane medium followed by ligand addition, and leads to [ Au III ( dppm ) ( R a a i R ′ ) ] ( OTf ) 2 ( R a a i R ′ = p –R–C 6 H 4 –N = N–C 3 H 2 –NN–1– R ′ , (1–3), abbreviated as N, N ′ -chelator, where N(imidazole) and N(azo) represent N and N ′ , resp.; R = H (a), Me (b), Cl (c) and R ′ = Me (1), CH 2 CH 3 (2), CH 2 Ph (3), dppm is diphenylphosphinomethane, OSO 2 CF 3 is the triflate anion, and tht is tetrahydrothiophen). Ir spectra of the complexes show –C=N– and –N=N– stretching near at 1590 and 1370 cm − 1 and near at 1100, 755, 695, 545, and 505 cm − 1 due to the presence of dppm. The H 1 NMR spectral measurements suggest that methylene, – CH 2 –, in RaaiEt gives a complex AB type multiplet while in Raai CH 2 Ph it shows AB type quartets. Electrochemistry assigns ligand reduction.","PeriodicalId":329389,"journal":{"name":"Srx Chemistry","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116867186","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: 0
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