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Polydopamine-coated photoautotrophic bacteria for improving extracellular electron transfer in living photovoltaics

Nano Research 2024年第2期17卷 866-874页

作者： Melania Reggente Charlotte Roullier Mohammed Mouhib Patricia Brandl Hanxuan Wang Stefano Tacconi Francesco Mura Luciana dini Rossella Labarile Massimo Trotta Fabian Fischer Ardemis A.Boghossian Institute of Chemical Sciences and Engineering(ISIC) Ecole Polytechnique Fédérale de Lausanne(EPFL)Lausanne 1015Switzerland Department of Biology and Biotechnology Charles darwin Sapienza University of RomeRome 00185Italy Research Center on Nanotechnology Applied for Engineering of Sapienza(CNIS) University of Rome SapienzaRome 00185Italy CNR-IPCF Consiglio Nazionale delle Ricerche–Istituto per i Processi Chimico Fisici Bari 70126Italy Institute of Life Technologies HES-SO Valais-WallisSion 1950Switzerland Institute for Renewable Energy HES-SO Valais-WallisSion 1950Switzerland

Living photovoltaics are microbial electrochemical devices that use whole cell–electrode interactions to convert solar energy to *** bottleneck in these technologies is the limited electron transfer between the microbe and the electrode *** study focuses on enhancing this transfer by engineering a polydopamine(Pda)coating on the outer membrane of the photosynthetic microbe Synechocystis *** coating provides a conductive nanoparticle shell to increase electrode adhesion and improve microbial charge extraction.A combination of scanning electron microscopy(SEM),transmission electron microscopy(TEM),UV–Vis absorption,and Raman spectroscopy measurements were used to characterize the nanoparticle shell under various synthesis *** cell viability and activity were further assessed through oxygen evolution,growth curve,and confocal fluorescence microscopy *** results show sustained cell growth and detectable Pda surface coverage under slightly alkaline conditions(pH 7.5)and at low initial dopamine(da)concentrations(1 mM).The exoelectrogenicity of the cells prepared under these conditions was also characterized through cyclic voltammetry(CV)and chronoamperometry(CA).The measurements show a three-fold enhancement in the photocurrent at an applied bias of 0.3 V(***/AgCl[3 M KCl])compared to non-coated *** study thus lays the framework for engineering the next generation of living photovoltaics with improved performances using biosynthetic electrodes.

关键词： biophotovoltaics bioelectronics photosynthetic bacteria cyanobacteria polydopamine adherence

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On the Regularity of Shear Thickening Viscous Fluids

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Chinese Annals of Mathematics,Series B 2009年第3期30卷 273-280页

作者： Francesca CRISPO Dipartimento di Matematica Applicata "U.dini" Università di PisaVia Buonarroti 1/c56127 PisaItaly.

The aim of this note is to improve the regularity results obtained by ***o da Veiga in 2008 for a class of p-fluid flows in a cubic *** key idea is exploiting the better regularity of solutions in the tangential dir... 详细信息

关键词：粘性流体 Sobolev 剪切流体流动利用规律切线方向各向异性立方

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电针不同经穴对不同性周期雌鼠黑质神经元放电的影响

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上海针灸杂志 1999年第4期18卷 34-35页

作者：孙启新马庆龄朱笛霓李春敏陕西省中医药研究院

探讨不同经穴的镇痛作用及针刺镇痛中多巴胺（ＤＡ）与性激素的关系。方法在去卵巢（ＯＶＸ）大鼠和ＯＶＸ加注雌二醇（ＯＶＸ＋Ｅ２）大鼠黑质（ＳＮ）神经元的自发放电和几种刺激的诱发反应之后，分别电针“肾俞”或“三阴交”两穴，... 详细信息

探讨不同经穴的镇痛作用及针刺镇痛中多巴胺（ＤＡ）与性激素的关系。方法在去卵巢（ＯＶＸ）大鼠和ＯＶＸ加注雌二醇（ＯＶＸ＋Ｅ２）大鼠黑质（ＳＮ）神经元的自发放电和几种刺激的诱发反应之后，分别电针“肾俞”或“三阴交”两穴，以观察电针不同经、穴对上述反应的影响。结果电针“三阴交”后，两组自发放电均趋抑制；而电针“肾俞”后，两组放电均有不同程度激活。结论经、穴对同一ＳＮ单位的不同作用表明经、穴是相对独立存在的，各经、穴分别产生不同的调节机制；针刺在镇痛过程中可能对体内的激素水平、镇痛系统和递质系统产生了复杂的综合调节作用。

关键词：电针黑质多巴胺神经元性激素针刺镇痛

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夹脊穴和足三里穴埋线刺激对老年大鼠不同脑区单胺类神经递质含量的影响

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中国老年学杂志 1999年第1期19卷 35-36页

作者：刘琦马晓明陕西省中医药研究院

老年大鼠性腺内分泌及生殖功能衰退主要与下丘脑释放ＧｎＲＨ的能力下降有关，而ＧｎＲＨ释放减少又与下丘脑ＣＡ类神经递质（ＮＡ、ＤＡ）含量下降，ＣＡ／５－ＨＴ比值下降有关。在老年大鼠夹脊穴和足三里穴埋线四次，刺激４０ｄ后，... 详细信息

老年大鼠性腺内分泌及生殖功能衰退主要与下丘脑释放ＧｎＲＨ的能力下降有关，而ＧｎＲＨ释放减少又与下丘脑ＣＡ类神经递质（ＮＡ、ＤＡ）含量下降，ＣＡ／５－ＨＴ比值下降有关。在老年大鼠夹脊穴和足三里穴埋线四次，刺激４０ｄ后，用荧光法测定海马、下丘脑和中内５－ＨＴ、ＮＡ、ＤＡ含量。发现老年大鼠５－ＨＴ、ＤＡ、ＤＡ、ＮＡ含量都降低，以ＮＡ、ＤＡ降低尤为明显。穴位刺激后５－ＨＴ、ＮＡ、ＤＡ含量升高，其中ＤＡ。

关键词：穴位神经递质衰老穴位埋线刺激

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