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Bakonyi, Pé,ter,Koó,k, Lá,szló,Kumar, Gopalakrishnan,Tó,th, Gá,bor,Ró,zsenberszki, Tamá,s,Nguyen, Dinh Duc,Chang, Soon Woong,Zhen, Guangyin,Bé,laf Elsevier 2018 Journal of membrane science Vol.564 No.-
<P><B>Abstract</B></P> <P>Significant advances in the design of bioelectrochemical systems (BES) have promoted these applications to be seen as contemporary biotechnological platforms. However, notable issues in system architecture are still to be addressed and overcome, in particular concerning the membrane separators, which rely widely on polymers. These architectural components play a key-role in facilitating the transport of ions (i.e. protons) between the (compartments containing the) electrodes and therefore, their properties substantially influence the overall BES performance. This article aims presenting an up-to-date survey on the important accomplishments and promising outlooks with polymer-based membranes (both porous/non-porous, charged/uncharged) applied in BES (first and foremost microbial fuel cells, MFCs) that could drive this technology towards enhanced efficiency. Because of the interdisciplinary concept of BES, it attracts attention from scientists and engineers involved in environmental biotechnology, microbial electrochemistry and applied material sciences and as a result, this review paper would target the audience of these fields with particular interest on the progress with membrane separators fabricated with various polymeric materials.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Critical membrane separator properties in BES are assessed. </LI> <LI> Techniques for membrane/separator characterization are outlined. </LI> <LI> Various polymer-based membranes/separators used in BES are discussed. </LI> <LI> Status and challenges for membrane development in BES are evaluated. </LI> </UL> </P>
Benlloch, Reyes,Kim, Min Chul,Sayou, Camille,Thé,venon, Emmanuel,Parcy, Francois,Nilsson, Ove Blackwell Publishing Ltd 2011 The Plant journal Vol.67 No.6
<P><B>Summary</B></P><P>The transition to flowering in <I>Arabidopsis</I> is characterized by the sharp and localized upregulation of <I>APETALA1</I> (<I>AP1</I>) transcription in the newly formed floral primordia. Both the flower meristem‐identity gene <I>LEAFY</I> (<I>LFY</I>) and the photoperiod pathway involving the <I>FLOWERING LOCUS T</I> (<I>FT</I>) and <I>FD</I> genes contribute to this upregulation. These pathways have been proposed to act independently but their respective contributions and mode of interaction have remained elusive. To address these questions, we studied the <I>AP1</I> regulatory region. Combining <I>in vitro</I> and <I>in vivo</I> approaches, we identified which of the three putative LFY binding sites present in the <I>AP1</I> promoter is essential for its activation by LFY. Interestingly, we found that this site is also important for the correct photoperiodic‐dependent upregulation of <I>AP1</I>. In contrast, a previously proposed putative FD‐binding site appears dispensable and unable to bind FD and we found no evidence for FD binding to other sites in the <I>AP1</I> promoter, suggesting that the FT/FD‐dependent activation of <I>AP1</I> might be indirect. Altogether, our data give new insight into the interaction between the FT and LFY pathways in the upregulation of <I>AP1</I> transcription under long‐day conditions.</P>
Koó,s, Antal A.,Vancsó,, Pé,ter,Magda, Gá,bor Z.,Osvá,th, Zoltá,n,Kerté,sz, Krisztiá,n,Dobrik, Gergely,Hwang, Chanyong,Tapasztó,, Levente,Bir&oacu Elsevier 2016 Carbon Vol.105 No.-
<P>Heterostructures of 2D materials are expected to become building blocks of next generation nanoelectronic devices. Therefore, the detailed understanding of their interfaces is of particular importance. In order to gain information on the properties of the graphene - MoS2 system, we have investigated MoS2 sheets grown by chemical vapour deposition (CVD) on highly ordered pyrolytic graphite (HOPG) as a model system with atomically clean interface. The results are compared with results reported recently for MoS2 grown on epitaxial graphene on SiC. Our STM study revealed that the crystallographic orientation of MoS2 sheets is determined by the orientation of the underlying graphite lattice. This epitaxial orientation preference is so strong that the MoS2 flakes could be moved on HOPG with the STM tip over large distances without rotation. The electronic properties of the MoS2 flakes have been investigated using tunneling spectroscopy. A significant modification of the electronic structure has been revealed at flake edges and grain boundaries. These features are expected to have an important influence on the performance of nanoelectronic devices. We have also demonstrated the ability of the STM to define MoS2 nanoribbons down to 12 nm width, which can be used as building blocks for future nanoelectronic devices. (C) 2016 Elsevier Ltd. All rights reserved.</P>
Dust properties across the CO snowline in the HD 163296 disk from ALMA and VLA observations
Guidi, G.,Tazzari, M.,Testi, L.,de Gregorio-Monsalvo, I.,Chandler, C. J.,Pé,rez, L.,Isella, A.,Natta, A.,Ortolani, S.,Henning, Th.,Corder, S.,Linz, H.,Andrews, S.,Wilner, D.,Ricci, L.,Carpenter, Springer-Verlag 2016 Astronomy and astrophysics Vol.588 No.-
Blunted hypoxic pulmonary vasoconstriction in experimental neonatal chronic lung disease.
Rey-Parra, Gloria Juliana,Archer, Stephen L,Bland, Richard D,Albertine, Kurt H,Carlton, David P,Cho, Soo-Chul,Kirby, Beth,Haromy, Al,Eaton, Farah,Wu, Xichen,Thé,baud, Bernard American Lung Association 2008 American journal of respiratory and critical care Vol.178 No.4
<P>RATIONALE: Neonatal chronic lung disease (CLD), caused by prolonged mechanical ventilation (MV) with O(2)-rich gas, is the most common cause of long-term hospitalization and recurrent respiratory illness in extremely premature infants. Recurrent episodes of hypoxemia and associated ventilator adjustments often lead to worsening CLD. The mechanism that causes these hypoxemic episodes is unknown. Hypoxic pulmonary vasoconstriction (HPV), which is partially controlled by O(2)-sensitive voltage-gated potassium (K(v)) channels, is an important adaptive response to local hypoxia that helps to match perfusion and ventilation in the lung. OBJECTIVES: To test the hypothesis that chronic lung injury (CLI) impairs HPV. METHODS: We studied preterm lambs that had MV with O(2)-rich gas for 3 weeks and newborn rats that breathed 95%-O(2) for 2 weeks, both of which resulted in airspace enlargement and pulmonary vascular changes consistent with CLD. MEASUREMENTS AND MAIN RESULTS: HPV was attenuated in preterm lambs with CLI after 2 weeks of MV and in newborn rats with CLI after 2 weeks of hyperoxia. HPV and constriction to the K(v)1.x-specific inhibitor, correolide, were preferentially blunted in excised distal pulmonary arteries (dPAs) from hyperoxic rats, whose dPAs exhibited decreased K(v)1.5 and K(v)2.1 mRNA and K(+) current. Intrapulmonary gene transfer of K(v)1.5, encoding the ion channel that is thought to trigger HPV, increased O(2)-sensitive K(+) current in cultured smooth muscle cells from rat dPAs, and restored HPV in hyperoxic rats. CONCLUSIONS: Reduced expression/activity of O(2)-sensitive K(v) channels in dPAs contributes to blunted HPV observed in neonatal CLD.</P>
The State-of-Play of Anomalous Microwave Emission (AME) research
Dickinson, Clive,Ali-Haï,moud, Y.,Barr, A.,Battistelli, E.S.,Bell, A.,Bernstein, L.,Casassus, S.,Cleary, K.,Draine, B.T.,Gé,nova-Santos, R.,Harper, S.E.,Hensley, B.,Hill-Valler, J.,Hoang, Th Elsevier 2018 New astronomy reviews Vol.80 No.-
<P><B>Abstract</B></P> <P>Anomalous Microwave Emission (AME) is a component of diffuse Galactic radiation observed at frequencies in the range ≈ 10–60 GHz. AME was first detected in 1996 and recognised as an additional component of emission in 1997. Since then, AME has been observed by a range of experiments and in a variety of environments. AME is spatially correlated with far-IR thermal dust emission but cannot be explained by synchrotron or free–free emission mechanisms, and is far in excess of the emission contributed by thermal dust emission with the power-law opacity consistent with the observed emission at sub-mm wavelengths. Polarization observations have shown that AME is very weakly polarized ( ≲ 1 %). The most natural explanation for AME is rotational emission from ultra-small dust grains (“spinning dust”), first postulated in 1957. Magnetic dipole radiation from thermal fluctuations in the magnetization of magnetic grain materials may also be contributing to the AME, particularly at higher frequencies ( ≳ 50 GHz). AME is also an important foreground for Cosmic Microwave Background analyses. This paper presents a review and the current state-of-play in AME research, which was discussed in an AME workshop held at ESTEC, The Netherlands, June 2016.</P>