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11.
12.
Dinh Chuong Nguyen Duy Thanh Tran Thi Luu Luyen Doan Do Hwan Kim Nam Hoon Kim Joong Hee Lee 《Liver Transplantation》2020,10(8)
A novel hybrid of small core@shell structured CoSx@Cu2MoS4 uniformly hybridizing with a molybdenum dichalcogenide/N,S‐codoped graphene hetero‐network (CoSx@Cu2MoS4‐MoS2/NSG) is prepared by a facile route. It shows excellent performance toward the oxygen reduction reaction (ORR), oxygen evolution reaction (OER), and hydrogen evolution reaction (HER) in alkaline medium. The hybrid exhibits rapid kinetics for ORR with high electron transfer number of ≈3.97 and exciting durability superior to commercial Pt/C. It also demonstrates great potential with remarkable stability for HER and OER, requiring low overpotential of 118.1 and 351.4 mV, respectively, to reach a current density of 10 mA cm?2. An electrolyzer based on CoSx@Cu2MoS4‐MoS2/NSG produces low cell voltage of 1.60 V and long‐term stability, surpassing a device of Pt/C + RuO2/C. In addition, a Zn‐air battery using cathodic CoSx@Cu2MoS4‐MoS2/NSG catalyst delivers a high cell voltage of ≈1.44 V and a power density of 40 mW cm?2 at 58 mA cm?2, better than the state‐of‐the‐art Pt/C catalyst. These achievements are due to the rational combination of highly active core@shell CoSx@Cu2MoS4 with large‐area and high‐porosity MoS2/NSG to produce unique physicochemical properties with multi‐integrated active centers and synergistic effects. The outperformances of such catalyst suggest an advanced candidate for multielectrocatalysis applications in metal‐air batteries and hydrogen production. 相似文献
13.
Shai Meiri Luciano Avila Aaron M. Bauer David G. Chapple Indraneil Das Tiffany M. Doan Paul Doughty Ryan Ellis Lee Grismer Fred Kraus Mariana Morando Paul Oliver Daniel Pincheira‐Donoso Marco Antonio Ribeiro‐Junior Glenn Shea Omar Torres‐Carvajal Alex Slavenko Uri Roll 《Global Ecology and Biogeography》2020,29(9):1515-1530
14.
Hien Van Doan Seyed Hossein Hoseinifar Wanaporn Tapingkae Mintra Seel-audom Sanchai Jaturasitha Mahmoud A. O. Dawood Sutee Wongmaneeprateep Tran Thi Nang Thu Maria ngeles Esteban 《Probiotics and antimicrobial proteins》2020,12(2):400-411
The present work, herein, studied the effects of corncob-derived xylooligosaccharides (CDXOS) and Lactobacillus plantarum CR1T5 (LP) integrated into fish d 相似文献
15.
Nguyen Thi Quynh Mai Nguyen Thi Kim Thu Le Dac Tuyen Truong Chi Lam Vu Dinh Lam Nguyen Thi Quynh Hoa 《Plasmonics (Norwell, Mass.)》2021,16(5):1583-1592
Plasmonics - Developing a simple structure using low-cost material that enables both large-scale fabrication and broadband absorption response is highly desirable but very challenging for achieving... 相似文献
16.
Aquaporins (AQPs) are channel proteins that facilitate the transport of water and small solutes across biological membranes. In plants, AQPs exhibit a high multiplicity of isoforms in relation to a high diversity of sub‐cellular localizations, at the plasma membrane (PM) and in various intracellular compartments. Some members also exhibit a dual localization in distinct cell compartments, whereas others show polarized or domain‐specific expression at the PM or tonoplast, respectively. A diversity of mechanisms controlling the routing of newly synthesized AQPs towards their destination membranes and involving diacidic motifs, phosphorylation or tetramer assembly is being uncovered. Recent approaches using single particle tracking, fluorescence correlation spectroscopy and fluorescence recovery after photobleaching have, in combination with pharmacological interference, stressed the peculiarities of AQP sub‐cellular dynamics in environmentally challenging conditions. A role for clathrin and sterol‐rich domains in cell surface dynamics and endocytosis of PM AQPs was uncovered. These recent advances provide deep insights into the cellular mechanisms of water transport regulation in plants. They also point to AQPs as an emerging model for studying the sub‐cellular dynamics of plant membrane proteins . 相似文献
17.
Urja Naik Quynh Phuong Hai Nguyen Rene E. Harrison 《Journal of cellular biochemistry》2020,121(1):183-199
Our current understanding of phagocytosis is largely derived from studies of individual receptor-ligand interactions and their downstream signaling pathways. Because phagocytes are exposed to a variety of ligands on heterogeneous target particles in vivo, it is important to observe the engagement of multiple receptors simultaneously and the triggered involvement of downstream signaling pathways. Potential crosstalk between the two well-characterized opsonic receptors, FcγR and CR3, was briefly explored in the early 1970s, where macrophages were challenged with dual-opsonized targets. However, subsequent studies on receptor crosstalk were primarily restricted to using single opsonins on different targets, typically at saturating opsonin conditions. Beyond validating these initial explorations on receptor crosstalk, we identify the early signaling mechanisms that underlie the binding and phagocytosis during the simultaneous activation of both opsonic receptors, through the presence of a dual-opsonized target (immunoglobulin G [IgG] and C3bi), compared with single receptor activation. For this purpose, we used signaling protein inhibitor studies as well as live cell brightfield and fluorescent imaging to fully understand the role of tyrosine kinases, F-actin dynamics and internalization kinetics for FcγR and CR3. Importantly, opsonic receptors were studied together and in isolation, in the context of sparsely opsonized targets. We observed enhanced particle binding and a synergistic effect on particle internalization during the simultaneous activation of FcγR and CR3 engaged with sparsely opsonized targets. Inhibition of early signaling and cytoskeletal molecules revealed a differential involvement of Src kinase for FcγR- vs CR3- and dual receptor-mediated phagocytosis. Src activity recruits Syk kinase and we observed intermediate levels of Syk phosphorylation in dual-opsonized particles compared with those opsonized with IgG or C3bi alone. These results likely explain the intermediate levels of F-actin that is recruited to sites of dual-opsonized particle uptake and the notoriously delayed internalization of C3bi-opsonized targets by macrophages. 相似文献
18.
Laetitia Poidevin Julia Feliu Annick Doan Jean-Guy Berrin Mathieu Bey Pedro M. Coutinho Bernard Henrissat Eric Record Senta Heiss-Blanquet 《Applied and environmental microbiology》2013,79(14):4220-4229
The ascomycete Podospora anserina is a coprophilous fungus that grows at late stages on droppings of herbivores. Its genome encodes a large diversity of carbohydrate-active enzymes. Among them, four genes encode glycoside hydrolases from family 6 (GH6), the members of which comprise putative endoglucanases and exoglucanases, some of them exerting important functions for biomass degradation in fungi. Therefore, this family was selected for functional analysis. Three of the enzymes, P. anserina Cel6A (PaCel6A), PaCel6B, and PaCel6C, were functionally expressed in the yeast Pichia pastoris. All three GH6 enzymes hydrolyzed crystalline and amorphous cellulose but were inactive on hydroxyethyl cellulose, mannan, galactomannan, xyloglucan, arabinoxylan, arabinan, xylan, and pectin. PaCel6A had a catalytic efficiency on cellotetraose comparable to that of Trichoderma reesei Cel6A (TrCel6A), but PaCel6B and PaCel6C were clearly less efficient. PaCel6A was the enzyme with the highest stability at 45°C, while PaCel6C was the least stable enzyme, losing more than 50% of its activity after incubation at temperatures above 30°C for 24 h. In contrast to TrCel6A, all three studied P. anserina GH6 cellulases were stable over a wide range of pHs and conserved high activity at pH values of up to 9. Each enzyme displayed a distinct substrate and product profile, highlighting different modes of action, with PaCel6A being the enzyme most similar to TrCel6A. PaCel6B was the only enzyme with higher specific activity on carboxymethylcellulose (CMC) than on Avicel and showed lower processivity than the others. Structural modeling predicts an open catalytic cleft, suggesting that PaCel6B is an endoglucanase. 相似文献
19.
Self‐Assembled BiFeO3‐ε‐Fe2O3 Vertical Heteroepitaxy for Visible Light Photoelectrochemistry 下载免费PDF全文
Le Thi Quynh Chien Nguyen Van Yugandhar Bitla Jhih‐Wei Chen Thi Hien Do Wen‐Yen Tzeng Sheng‐Chieh Liao Kai‐An Tsai Yi‐Chun Chen Chun‐Lin Wu Chih‐Huang Lai Chih‐Wei Luo Yung‐Jung Hsu Ying‐Hao Chu 《Liver Transplantation》2016,6(18)
Self‐assembled vertical heterostructure with a high interface‐to‐volume ratio offers tremendous opportunities to realize intriguing properties and advanced modulation of functionalities. Here, a heterostructure composed of two visible‐light photocatalysts, BiFeO3 (BFO) and ε‐Fe2O3 (ε‐FO), is designed to investigate its photoelectrochemical performance. The structural characterization of the BFO‐FO heterostructures confirms the phase separation with BFO nanopillars embedded in the ε‐FO matrix. The investigation of band structure of the heterojunction suggests the assistance of photoexcited carrier separation, leading to an enhanced photoelectrochemical performance. The insights into the charge separation are further revealed by means of ultrafast dynamics and electrochemical impedance spectroscopies. This work shows a delicate design of the self‐assembled vertical heteroepitaxy by taking advantage of the intimate contact between two phases that can lead to a tunable charge interaction, providing a new configuration for the optimization of photoelectrochemical cell. 相似文献
20.
Joanna Maria Radziwill-Bienkowska Doan Thanh Lam Le Pawel Szczesny Marie-Pierre Duviau Tamara Aleksandrzak-Piekarczyk Pascal Loubière Muriel Mercier-Bonin Jacek Karol Bardowski Magdalena Kowalczyk 《Applied microbiology and biotechnology》2016,100(22):9605-9617
Understanding the nature of mucus-microbe interactions will provide important information that can help to elucidate the mechanisms underlying probiotic adhesion. This study focused on the adhesive properties of the Lactococcus lactis subsp. cremoris IBB477 strain, previously shown to persist in the gastrointestinal tract of germ-free rats. The shear flow-induced detachment of L. lactis cells was investigated under laminar flow conditions. Such a dynamic approach demonstrated increased adhesion to bare and mucin-coated polystyrene for IBB477, compared to that observed for the MG1820 control strain. To identify potential genetic determinants giving adhesive properties to IBB477, the improved high-quality draft genome sequence comprising chromosome and five plasmids was obtained and analysed. The number of putative adhesion proteins was determined on the basis of surface/extracellular localisation and/or the presence of adhesion domains. To identify proteins essential for the IBB477 specific adhesion property, nine deletion mutants in chromosomal genes have been constructed and analysed using adhesion tests on bare polystyrene as well as mucin-, fibronectin- or collagen IV-coated polystyrene plates in comparison to the wild-type strain. These experiments demonstrated that gene AJ89_07570 encoding a protein containing DUF285, MucBP and four Big_3 domains is involved in adhesion to bare and mucin-coated polystyrene. To summarise, in the present work, we characterised the adhesion of IBB477 under laminar flow conditions; identified the putative adherence factors present in IBB477, which is the first L. lactis strain exhibiting adhesive and mucoadhesive properties to be sequenced and demonstrated that one of the proteins containing adhesion domains contributes to adhesion. 相似文献