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Topological characterization and immobilization of a chromatophore membrane from Rhodopseudomonas viridis for application as a photoelectrical device 绿色红假单胞菌光电子器件色素体膜的拓扑表征及固定化
Supramolecular Science Pub Date : 1998-10-01 DOI: 10.1016/S0968-5677(98)00111-4
M. Hara , S. Ajiki , J. Miyake
{"title":"Topological characterization and immobilization of a chromatophore membrane from Rhodopseudomonas viridis for application as a photoelectrical device","authors":"M. Hara ,&nbsp;S. Ajiki ,&nbsp;J. Miyake","doi":"10.1016/S0968-5677(98)00111-4","DOIUrl":"10.1016/S0968-5677(98)00111-4","url":null,"abstract":"<div><p>We characterized topological orientation of bacterial photosynthetic membranes (chromatophores) from <em>Rhodopseudomonas viridis</em> using antibodies against H- and C-subunit of photosynthetic reaction center protein (RC). About 40% of the membranes were unsealed vesicles in the inside-out orientation exposing the cytoplasmic side whereas 20% of those were unsealed vesicles in the right side-out orientation expo-sing the periplasmic side. The residual 20% was in the form of a flat sheet structure. We immobilized the chromatophore membranes onto an indium–tin-oxide (ITO) electrode by the electro-deposition method. The electro-deposited film (ED film) showed photocurrent and photovoltage between different electrodes such as ITO and gold (Au). Addition of buffer salts such as sodium phosphate enhanced very much the photoelectrical response in the ED film.</p></div>","PeriodicalId":22050,"journal":{"name":"Supramolecular Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1998-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0968-5677(98)00111-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73430450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Capacitance–voltage property of composite microsphere monolayer with polymer/Fe2O3/ polymer structure 聚合物/Fe2O3/聚合物复合微球单层的电容-电压特性
Supramolecular Science Pub Date : 1998-10-01 DOI: 10.1016/S0968-5677(98)00102-3
X.M. Qian , H. Du , X.T. Zhang , L.S. Li , D.Y. Wang , J. Tang , R. Lu , Y.B. Bai , T.J. Li , X.Y. Tang , W.M. Li , D.B. Hu
{"title":"Capacitance–voltage property of composite microsphere monolayer with polymer/Fe2O3/ polymer structure","authors":"X.M. Qian ,&nbsp;H. Du ,&nbsp;X.T. Zhang ,&nbsp;L.S. Li ,&nbsp;D.Y. Wang ,&nbsp;J. Tang ,&nbsp;R. Lu ,&nbsp;Y.B. Bai ,&nbsp;T.J. Li ,&nbsp;X.Y. Tang ,&nbsp;W.M. Li ,&nbsp;D.B. Hu","doi":"10.1016/S0968-5677(98)00102-3","DOIUrl":"10.1016/S0968-5677(98)00102-3","url":null,"abstract":"<div><p>Inorganic nanoparticles Fe<sub>2</sub>O<sub>3</sub> 3–5<!--> <!-->nm in diameter were assembled on the surface of polymer microspheres and then encapsulated in the polymer to form a trilayer composite structure. The capacitance–voltage (<em>C</em>–<em>V</em>) curve of the composite microsphere monolayer shows the presence of a plateau. The electron transportation process in the special structure was investigated combining with the energy band model. The results show that Fe<sub>2</sub>O<sub>3</sub> layer acts as a charge trap between polymer layers which are regarded as potential barriers.</p></div>","PeriodicalId":22050,"journal":{"name":"Supramolecular Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1998-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0968-5677(98)00102-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80037340","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Self-assembly of supramolecular complexes based on hydrogen bonding 基于氢键的超分子配合物的自组装
Supramolecular Science Pub Date : 1998-10-01 DOI: 10.1016/S0968-5677(98)00090-X
Haipeng Zheng, Ruifeng Zhang, Jiacong Shen
{"title":"Self-assembly of supramolecular complexes based on hydrogen bonding","authors":"Haipeng Zheng,&nbsp;Ruifeng Zhang,&nbsp;Jiacong Shen","doi":"10.1016/S0968-5677(98)00090-X","DOIUrl":"10.1016/S0968-5677(98)00090-X","url":null,"abstract":"<div><p>Self-assembly of hydrogen-bonding recognition complexes—2.5-bis(alkylamino)-1,4-benzoquinones were studied, and thermotropic liquid crystalline behavior of 2.5-bis(dodecylamino)-1,4-benzoquinone was further investigated. The obtained results showed that a ribbon-like backbone in this system plays an important role in keeping the layered supramolecular structure.</p></div>","PeriodicalId":22050,"journal":{"name":"Supramolecular Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1998-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0968-5677(98)00090-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81900912","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
The synthesis of aminotri-tert-butyl phthalocyanine and its gas sensitivity to nitrogen dioxide 氨基三叔丁基酞菁的合成及其对二氧化氮的气敏性
Supramolecular Science Pub Date : 1998-10-01 DOI: 10.1016/S0968-5677(98)00062-5
W.P. Hu, Y.Q. Liu, S.G. Liu, S.Q. Zhou, D.B. Zhu
{"title":"The synthesis of aminotri-tert-butyl phthalocyanine and its gas sensitivity to nitrogen dioxide","authors":"W.P. Hu,&nbsp;Y.Q. Liu,&nbsp;S.G. Liu,&nbsp;S.Q. Zhou,&nbsp;D.B. Zhu","doi":"10.1016/S0968-5677(98)00062-5","DOIUrl":"10.1016/S0968-5677(98)00062-5","url":null,"abstract":"<div><p>Aminotri-tert-butyl phthalocyanine (AmBuPc) is a new asymmetrical phthalocyanine, which possesses three tert-butyl groups and one amino-group. All the substituents are electron-donating ones and have a strong electron-donating ability when they interact with oxidizing gases, such as NO<sub>2</sub>. We report its synthesis and its gas sensitivity to nitrogen dioxide, and reveal the electrochemical properties of this compound.</p></div>","PeriodicalId":22050,"journal":{"name":"Supramolecular Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1998-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0968-5677(98)00062-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72799008","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Monolayer behavior and BAM observaion of biphenyl liquid crystalline polysiloxane at the A/W interface 联苯液晶聚硅氧烷在A/W界面上的单层行为和BAM观察
Supramolecular Science Pub Date : 1998-10-01 DOI: 10.1016/S0968-5677(98)00080-7
Qingbin Xue , Kongzhang Yang , Xiao Chen , Qizhen Zhang
{"title":"Monolayer behavior and BAM observaion of biphenyl liquid crystalline polysiloxane at the A/W interface","authors":"Qingbin Xue ,&nbsp;Kongzhang Yang ,&nbsp;Xiao Chen ,&nbsp;Qizhen Zhang","doi":"10.1016/S0968-5677(98)00080-7","DOIUrl":"10.1016/S0968-5677(98)00080-7","url":null,"abstract":"<div><p>Monolayers of a chiral biphenyl liquid crystalline polysiloxane and its monomer have been studied by <em>π</em>–A isotherms and hysteresis measurements. Both of them can form monolayers at different temperatures. The molecular packing in the monolayers are temperature-dependent for the monomer but not for the polymer. The molecular orderings are dominated by the packing of the biphenyl mesogens. Metastable monolayers with different ordering and thickness of domains have been directly observed by Brewster Angle Microscopy (BAM) in monomer monolayers. Both of them show characteristics of rigid monolayers. A broken process of the monolayers can be observed during expansion.</p></div>","PeriodicalId":22050,"journal":{"name":"Supramolecular Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1998-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0968-5677(98)00080-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84662712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Photocatalytic TiO2 nanoparticles damage to cellular membranes and genetic supramolecules 光催化TiO2纳米粒子对细胞膜和遗传超分子的损伤
Supramolecular Science Pub Date : 1998-10-01 DOI: 10.1016/S0968-5677(98)00063-7
Minhua Xu, Jianmin Ma, Jianhua Gu, Zuhong Lu
{"title":"Photocatalytic TiO2 nanoparticles damage to cellular membranes and genetic supramolecules","authors":"Minhua Xu,&nbsp;Jianmin Ma,&nbsp;Jianhua Gu,&nbsp;Zuhong Lu","doi":"10.1016/S0968-5677(98)00063-7","DOIUrl":"10.1016/S0968-5677(98)00063-7","url":null,"abstract":"<div><p>Photocatalytic TiO<sub>2</sub> nanoparticles are effective photocatalyzers which can damage the cellular membranes and genetic supramolecules such as DNA. In this experiment, we observed the lesion efficacy of the photocatalytic TiO<sub>2</sub> nanoparticles upon the cellular membrane and genetic molecule by transmission electron microscopy and single cell gel electrophoresis assay, and the mechanisim of the cell death by photocatalytic TiO<sub>2</sub> nanoparticles.</p></div>","PeriodicalId":22050,"journal":{"name":"Supramolecular Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1998-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0968-5677(98)00063-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78146017","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 15
Conformation-driven computing: simulating the context-conformation-action loop 构象驱动计算:模拟上下文-构象-行动循环
Supramolecular Science Pub Date : 1998-10-01 DOI: 10.1016/S0968-5677(98)00127-8
Klaus-Peter Zauner, Michael Conrad
{"title":"Conformation-driven computing: simulating the context-conformation-action loop","authors":"Klaus-Peter Zauner,&nbsp;Michael Conrad","doi":"10.1016/S0968-5677(98)00127-8","DOIUrl":"10.1016/S0968-5677(98)00127-8","url":null,"abstract":"<div><p>Function follows conformation in biological macromolecules. In general there are a number of possible conformational states. Which state is favored is determined by physicochemical context. The fusion of the features that comprise this context to form a particular conformational state is at the core of cellular control and biological information processing. We have developed a simulation system to investigate the information processing capabilities of networks of context-sensing macromolecules (to be illustrated by a simple example).</p></div>","PeriodicalId":22050,"journal":{"name":"Supramolecular Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1998-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0968-5677(98)00127-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75776902","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 11
Heteroaggregation and photoelectric conversion of porphyrins on a nanostructured TiO2 electrode 卟啉在纳米结构TiO2电极上的异聚集和光电转换
Supramolecular Science Pub Date : 1998-10-01 DOI: 10.1016/S0968-5677(98)00099-6
Huihua Deng, Zuhong Lu
{"title":"Heteroaggregation and photoelectric conversion of porphyrins on a nanostructured TiO2 electrode","authors":"Huihua Deng,&nbsp;Zuhong Lu","doi":"10.1016/S0968-5677(98)00099-6","DOIUrl":"10.1016/S0968-5677(98)00099-6","url":null,"abstract":"<div><p>The cosensitization of a nanostructured titanium dioxide (TiO<sub>2</sub>) electrode with tetrasulphonated porphyrins (MTsPP M=Zn H<sub>2</sub>) is reported. Cosensitization greatly enhances the photocurrent response at the <em>Q</em>-band of H<sub>2</sub>TsPP and markedly decreases the photocurrent response in the Soret band of ZnTsPP. The photoelectric behavior of the cosensitized TiO<sub>2</sub> electrode is attributed to the formation of heteroaggregates between H<sub>2</sub>TsPP and ZnTsPP molecules on the positively charged TiO<sub>2</sub> electrode by charge-transfer interaction resulting in the decrease of the surface concentration of the H<sub>2</sub>TsPP dimer and the presence of the low-lying charge-transfer state.</p></div>","PeriodicalId":22050,"journal":{"name":"Supramolecular Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1998-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0968-5677(98)00099-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72951617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
Design, synthesis and characterization of artificial phospholipids as model membrane receptors for specific binding of rabbit C-reactive protein 人造磷脂作为兔c反应蛋白特异性结合模型膜受体的设计、合成和表征
Supramolecular Science Pub Date : 1998-10-01 DOI: 10.1016/S0968-5677(98)00128-X
Qingzhong Zhou , Qiufeng Gao , Jing Tong , Yue Zhou , Jia Mao , Sen-fang Sui
{"title":"Design, synthesis and characterization of artificial phospholipids as model membrane receptors for specific binding of rabbit C-reactive protein","authors":"Qingzhong Zhou ,&nbsp;Qiufeng Gao ,&nbsp;Jing Tong ,&nbsp;Yue Zhou ,&nbsp;Jia Mao ,&nbsp;Sen-fang Sui","doi":"10.1016/S0968-5677(98)00128-X","DOIUrl":"10.1016/S0968-5677(98)00128-X","url":null,"abstract":"<div><p>C-reactive protein (CRP) is an acute phase reactive protein, which has been shown to specifically bind to phosphorylcholine (PC) and phosphorylethanoamine (PE) moieties in the presence of calcium. In order to investigate the effect of steric hindrance on the specific binding of CRP to membranes, we designed and synthesized six phospholipids, each containing a long-arm spacer of 3, 6 or 8 atoms between the head group and hydrophobic tail. By mixing synthesized lipids and natural lipids the ligand-containing monolayers were prepared, which have PC or PE groups protruding out of the membrane surface. To characterize of the synthesized phospholipids, the thickness of the lipid monolayers was measured by surface plasmon resonance (SPR) technique, the phase behavior of the lipid monolayer at air/water interface was studied by pressure–area analysis, and the specific binding of rabbit C-reactive protein to the synthesized lipid containing membranes was studied by imaging ellipsometry.</p></div>","PeriodicalId":22050,"journal":{"name":"Supramolecular Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1998-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0968-5677(98)00128-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79313330","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Neural network devices based on reaction–duffusion media: an approach to artificial retina 基于反应扩散介质的神经网络装置:一种人工视网膜的方法
Supramolecular Science Pub Date : 1998-10-01 DOI: 10.1016/S0968-5677(98)00121-7
Nicholas G. Rambidi
{"title":"Neural network devices based on reaction–duffusion media: an approach to artificial retina","authors":"Nicholas G. Rambidi","doi":"10.1016/S0968-5677(98)00121-7","DOIUrl":"10.1016/S0968-5677(98)00121-7","url":null,"abstract":"<div><p>Neural network architecture of devices based on reaction–diffusion media is discussed. Image processing operations performed by these media are similar to first steps of human vision mechanism.</p></div>","PeriodicalId":22050,"journal":{"name":"Supramolecular Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1998-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0968-5677(98)00121-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79479579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 19
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