Crystallization and preliminary X-ray crystallographic analysis of a blue-light-absorbing proteorhodopsin

Wang, Ning; Wang, Meitian; Gao, Y.; Ran, Tingting; Lan, Yanli; Wang, Jian; Xu, Li; Wang, Weiwu

doi:10.1107/s1744309111043612

Cited by 22 publications

(22 citation statements)

References 28 publications

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“…The LEP is responsible for the deformation of the octahedron coordination of Bi(III). 5,6 In our case, the lone electron pair of Bi(III) points in for opposite direction to the Br3 atoms. The orientation of octahedral chains indicates that these LEP point in [011] direction.…”

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confidence: 60%

Synthesis and Crystal Structure of Penthylenediammonium pentabromobismutate(III) [NH3(CH2)5NH3]BiBr5

Sghaier

Abdelhedi

Chaabouni

2012

X-ray Structure Analysis Online

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The structures of halogenoantimonates(III) and halogenobismuthates(III) with organic cations, a new group of ferroic crystals, are best described as molecular-ionic, organic inorganic hybrid materials. They consist of organic cations within anionic inorganic frameworks. Differences in the size, symmetry and ability to form hydrogen bonds of the various possible organic cations, together with the many different possible metal-halogen atom configurations, provide a rich family of compounds. The anionic structures that have been reported so far range from simple isolated [MX6] 3-octahedra and [MX5] 2-square pyramids (M-Sb III , Bi III ; X-Br, Cl, I) through isolated units containing octahedra/square pyramids, connected by corners, edges or faces, to infinite one-or two-dimensional polyanionic structures. 1,2 Single crystals of [NH3(CH2)5NH3]BiBr5 were obtained in the reaction of Bi(NO3)3 with NH2(CH2)5NH2 with a large excess of HBr. The synthesized compound was purified by repeated crystallizations. Yellow and transparent single crystals were grown at room temperature, and had the form of flat needles.The crystal and experimental data are given in Table 1. The positional parameters for the bismuth atoms were obtained from a three-dimensional Patterson map, while the remaining atoms were found from a successive difference Fourier map. After introducing anisotropic thermal displacement parameters for the non-hydrogen atoms, the hydrogen atoms were localized and optimized to fixed positions.Their contributions were isotropically introduced into the calculation, but not refined. The final anisotropic full-matrix least squares resulted in the convergence of the R factor to 0.0492 (Rw = 0.0547), incorporating the weighting scheme

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mentioning

confidence: 60%

Synthesis and Crystal Structure of Penthylenediammonium pentabromobismutate(III) [NH3(CH2)5NH3]BiBr5

Sghaier

Abdelhedi

Chaabouni

2012

X-ray Structure Analysis Online

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“…A traditional one is adopted for comparison, where a fast PN code phase scanning and serial search for FH pattern method [2] is adopted as a comparison. I n evaluating the performance, the following parameters were considered: PN code rate 1×10 6 here. It is seen that there is a loss of detection performance of hopping frequency and spread code after folded sampling.…”

Section: Resultsmentioning

confidence: 99%

“…The acquisition of DS/FH spread spectrum is an exciting research topic [1][2][3][4][5][6][7][8]. The search process is generally performed from two dimensions [1,2]: FH pattern and PN code phases.…”

Section: Introductionmentioning

confidence: 99%

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Fast Acquisition for DS/FH Spread Spectrum Signals by Using Folded Sampling Digital Receiver

Xiao¹,

Yang²,

Zou³

2018

Proceedings of Information Science and Cloud Computing — PoS(ISCC 2017)

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A fast acquisition method is proposed to improve the detection speed of direct sequence/ frequency hopping spread spectrum (DS/FHSS) communication system. A novel digital wideband receiver by using folded sampling is presented to reduce the searched hopping frequencies in coarse acquisition. There are two selective filters connected with the RF downconverter in the new scheme, one of which is wideband and the other is narrow and similar as the traditional one. The acquisition is achieved on two stages: firstly, the folded sampling is used when the wideband filter is selected and the hopping frequencies on multiple Nyquist zones are folded together on the first one, then fine acquisition is performed while the narrow band filter is selected. The detection performance of the propose method is deduced through state flow graph and verified by simulation. The results show the new method performs better when compared with the traditional one. It can effectively promote the detection speed with few detection performance loss.

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“…Wang e Lui [16] apontam ainda, que a perda das propriedades mecânicas pós incêndio dos aços para estruturas de concreto armado são insignificantes para temperaturas abaixo de 600ºC.…”

Section: Comparação Dos Valores Das Propriedades Resistentes Obtidos unclassified

Análise do comportamento de aços para estruturas de concreto armado em situação de incêndio

Laske¹,

Ibrahim²

2018

Simpósio Paranaense De Patologia Das Construções

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Resumo: O concreto é consagrado como um material que apresenta bom desempenho frente a situações de incêndio. Contudo, devido à heterogeneidade entre seus componentes, quando em situações de elevadas temperaturas, ocorrem alterações mecânicas, físicas e químicas que podem comprometer a integridade estrutural dos elementos. Dentre os constituintes deste, o aço é um elemento fundamental, visto que é o responsável pela resistência aos esforços de tração a que os elementos estruturais estão submetidos. Com o objetivo de analisar o comportamento do aço exposto a condição de incêndio, a partir de um procedimento experimental, foram realizados ensaios de tração em corpos de prova de aço CA 50 nas denominações GG 50 e VS 50, submetidos a diferentes temperaturas, sendo estas 200, 400, 600, 800 e 1000ºC durante 60 e 120 minutos cada, sendo posteriormente resfriados ao ar livre. Palavras-chave:Aço, Concreto, Incêndio, Resistência. Abstract:The concrete is established as a material that shows good performance in fire situations. However, due to the heterogeneity among its componentes in situations of high temperatures, there are mechanical, physical and chemical changes that can compromise the structural integrity of the elements. Among this constituents steel is a fundamental element, because it is responsible for the resistance of traction efforts that the structural elements are subject. With the aim of analyzing the behavior of steel subjected to fire condition from an experimental procedure, were performed traction assays were the samples were subjected to different temperatures, these being 200, 400, 600, 800 and 1000º C during 60 and 120 minutes each, and subsequently cooled in the open air.

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Crystallization and preliminary X-ray crystallographic analysis of a blue-light-absorbing proteorhodopsin

Cited by 22 publications

References 28 publications

Synthesis and Crystal Structure of Penthylenediammonium pentabromobismutate(III) [NH3(CH2)5NH3]BiBr5

Synthesis and Crystal Structure of Penthylenediammonium pentabromobismutate(III) [NH3(CH2)5NH3]BiBr5

Fast Acquisition for DS/FH Spread Spectrum Signals by Using Folded Sampling Digital Receiver

Análise do comportamento de aços para estruturas de concreto armado em situação de incêndio

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