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Interconnected hollow carbon nanospheres for stable lithium metal anodes
Zheng, Guangyuan,Lee, Seok Woo,Liang, Zheng,Lee, Hyun-Wook,Yan, Kai,Yao, Hongbin,Wang, Haotian,Li, Weiyang,Chu, Steven,Cui, Yi Nature Publishing Group, a division of Macmillan P 2014 Nature nanotechnology Vol.9 No.8
For future applications in portable electronics, electric vehicles and grid storage, batteries with higher energy storage density than existing lithium ion batteries need to be developed. Recent efforts in this direction have focused on high-capacity electrode materials such as lithium metal, silicon and tin as anodes, and sulphur and oxygen as cathodes. Lithium metal would be the optimal choice as an anode material, because it has the highest specific capacity (3,860 mAh g<SUP>–1</SUP>) and the lowest anode potential of all. However, the lithium anode forms dendritic and mossy metal deposits, leading to serious safety concerns and low Coulombic efficiency during charge/discharge cycles. Although advanced characterization techniques have helped shed light on the lithium growth process, effective strategies to improve lithium metal anode cycling remain elusive. Here, we show that coating the lithium metal anode with a monolayer of interconnected amorphous hollow carbon nanospheres helps isolate the lithium metal depositions and facilitates the formation of a stable solid electrolyte interphase. We show that lithium dendrites do not form up to a practical current density of 1 mA cm<SUP>–2</SUP>. The Coulombic efficiency improves to ∼99% for more than 150 cycles. This is significantly better than the bare unmodified samples, which usually show rapid Coulombic efficiency decay in fewer than 100 cycles. Our results indicate that nanoscale interfacial engineering could be a promising strategy to tackle the intrinsic problems of lithium metal anodes.
Aeromicrobium halotolerans sp. nov., isolated from desert soil sample
Yan, Zheng-Fei,Lin, Pei,Chu, Xiao,Kook, MooChang,Li, Chang-Tian,Yi, Tae-Hoo Springer-Verlag 2016 Archives of microbiology Vol.198 No.5
<P>A Gram-positive, aerobic, and non-motile, rod-shaped actinomycete strain, designated YIM Y47(T), was isolated from soils collected from Turpan desert, China, and subjected to a polyphasic taxonomic study. Phylogenetic analysis indicated that strain YIM Y47(T) belonged to the genus Aeromicrobium. YIM Y47(T) shared highest 16S rRNA gene sequence similarities with Aeromicrobium massiliense JC14(T) (96.47 %). Growth occurs at 20-45 A degrees C (optimum at 30 A degrees C), pH 6.0-8.0 (optimum at pH 7.0), and salinities of 0-7.0 % NaCl (optimum at 4.0 %). The strain YIM Y47(T) exhibits chemotaxonomic features with menaquinone-7 (MK-7) as the predominant quinone, C-16:0, C-18:1 omega 9c and 10-methyl C-18:0 (> 10 %) as major fatty acids. The cell-wall peptidoglycan of strain YIM Y47(T) contained ll-diaminopimelic acid as the diagnostic diamino acid. The polar lipids were found to consist of diphosphatidylglycerol, phosphatidylglycerol, phosphatidylinositol, and unknown phospholipids. The G+C content of the genomic DNA of strain YIM Y47(T) was found to be 44.7 mol%. On the basis of phylogenetic analyses and phenotypic data, it is proposed that strain YIM Y47(T) should be classified as representing a novel species of the genus Aeromicrobium, with the name Aeromicrobium halotolerans sp. nov. The type strain is YIM Y47(T) (=KCTC 39113(T)=CGMCC 1.15063(T)=DSM 29939(T)=JCM 30627(T)).</P>
Yan, Zheng-Fei,Trinh, Huan,Moya, Gabriela,Lin, Pei,Li, Chang-Tian,Kook, MooChang,Yi, Tae-Hoo Microbiology Society 2017 International journal of systematic and evolutiona Vol.67 No.10
<P>A Gram-negative, aerobic, non-motile, long rods or coccoid without flagellum strain, designated THG-YS3.2.7(T), was isolated from therhizosphere soil of a Mugunghwa flower collected from Kyung Hee University, Yongin, South Korea. Growth occurred at 10-40 degrees C (optimum 28-37 degrees C), at pH 6-8 (optimum 7) and at 0-5% NaCl (optimum 1 %). The predominant ubiquinone was ubiquinone 8 (Q-8). The major cellular fatty acids were C-10 : 0, C-10 : 0 3OH, C-16 : 0, C-17 : 0, C-17 : 0 cyclo, C-18 : 0, C(18 : 3 omega)6c (6,9,12), summed feature 3 (C-16 (: 1)omega 7c and/or C-16 : 1 omega 6c) and summed feature 8 (C-18 : 1 omega 7c and/or C-18 : 1 omega 6c). The major polar lipids were diphosphatidylglycerol (DPG), phosphatidylglycerol (PG), phosphatidylethanolamine (PE), phosphatidylcholine (PC). The DNA G+C content of strain THG-YS3.2.7(T) was 69.4 mol%. Based on 16S rRNA gene sequence analysis, the nearest phylogenetic neighbours of strain THG-YS3.2.7(T) were identified as Ramlibacter henchirensis DSM 14656(T) (97.92 %), Ramlibacter tataouinensis DSM 14655(T) (97.90 %), Ramlibacter solisilvae KACC 17567(T) (97.04 %). DNA-DNA hybridization values between strain THG-YS3.2.7(T) and R. henchirensis DSM 14656(T), R. tataouinensis DSM 14655(T), R. solisilvae KACC 17567(T) were 32.5 +/- 1.5, 43.1 +/- 1.1, 42.8 +/- 1.1 %, respectively. On the basis of the phylogenetic analysis, chemotaxonomic data, physiological characteristics and DNA-DNA hybridization data, strain THG-YS3.2.7(T) represent a novel species of the genus Ramlibacter, for which the name Ramlibacter rhizophilus sp. nov. is proposed. The type strain is THG-YS3.2.7(T) (= KCTC 52083(T) = CCTCC AB 2015357(T)).</P>
Increase in Hypotonic Stress-Induced Endocytic Activity in Macrophages via ClC-3
Yan, Yutao,Ding, Yu,Ming, Bingxia,Du, Wenjiao,Kong, Xiaoling,Tian, Li,Zheng, Fang,Fang, Min,Tan, Zheng,Gong, Feili Korean Society for Molecular and Cellular Biology 2014 Molecules and cells Vol.37 No.5
Extracellular hypotonic stress can affect cellular function. Whether and how hypotonicity affects immune cell function remains to be elucidated. Macrophages are immune cells that play key roles in adaptive and innate in immune reactions. The purpose of this study was to investigate the role and underlying mechanism of hypotonic stress in the function of bone marrow-derived macrophages (BMDMs). Hypotonic stress increased endocytic activity in BMDMs, but there was no significant change in the expression of CD80, CD86, and MHC class II molecules, nor in the secretion of TNF-${\alpha}$ or IL-10 by BMDMs. Furthermore, the enhanced endocytic activity of BMDMs triggered by hypotonic stress was significantly inhibited by chloride channel-3 (ClC-3) siRNA. Our findings suggest that hypotonic stress can induce endocytosis in BMDMs and that ClC-3 plays a central role in the endocytic process.
A New Objective Video Quality Metric for Stereoscopic Video
( Yan Zheng ),( Jungdong Seo ),( Kwanghoon Sohn ) 한국정보처리학회 2012 한국정보처리학회 학술대회논문집 Vol.19 No.1
Although quality metrics for 2D video quality assessment have been proposed, the quality models on stereoscopic video have not been widely studied. In this paper, a new objective video quality metric for stereoscopic video is proposed. The proposed algorithm consider three factors to evaluate stereoscopic video quality: blocking artifact, blurring artifact, and the difference between left and right view of stereoscopic video. The results show that the proposed algorithm has a higher correlation with DMOS than the others.