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Xiaomin Bao, Zurab Siprashvili, Brian J Zarnegar, Rajani M Shenoy, Eon J Rios, Natalie Nady, Kun Qu, Angela Mah, Daniel E Webster, Adam J Rubin, Glenn G Wozniak, Shiying Tao, Joanna Wysocka, Paul A Khavari
Somatic progenitors sustain tissue self-renewal while suppressing premature differentiation. Protein arginine methyltransferases (PRMTs) affect many processes; however, their role in progenitor function is incompletely understood. PRMT1 was found to be the most highly expressed PRMT in epidermal progenitors and the most downregulated PRMT during differentiation. In targeted mouse knockouts and in long-term regenerated human mosaic epidermis in vivo, epidermal PRMT1 loss abolished progenitor self-renewal and led to premature differentiation...
September 18, 2017: Developmental Cell
Deepak Dubal, Deepak Patil, Santosh Patil, N R Munirathnam, Pedro Gomez-Romero
The search of high-performance anode materials for Lithium-ion batteries (LIBs) is currently one of the most important tasks. Herein, we are introducing BiVO4 fern architectures as a new anode material for LIBs. The BiVO4 fern shows an excellent reversible capacity of 769 mAh/g (ultrahigh volumetric capacity of 3984 mAh/cm3) at 0.12 A/g with a great capacity retention. Later, a LIB full cell is assembled with BiVO4 ferns as anode and LiFePO4 (LFP, commercial) as cathode material. Notably, the device can achieve the capacity of 140 mAh/g at 1C rate that is 81 % of the capacity of cathode and maintained to 104 mAh/g at high C-rate of 8C, which makes BiVO4 a promising candidate as high-energy anode materials for LIBs...
September 21, 2017: ChemSusChem
Yanqun Ning, Xiaobing Lou, Chao Li, Xiaoshi Hu, Bingwen Hu
The controllable synthesis and structural tailoring of nanostructured metal organic frameworks (MOFs) is of huge significance in boosting their potential for rechargeable batteries. We herein present the facile synthesis of cobalt-based ultrathin metal- organic framework nanosheets (referred as "u-CoTDA") by using 2, 5-thiophenedicarboxylic (H2TDA) as the organic building block through a one-pot ultrasonic method for the first time. The obtained u-CoTDA exhibits high reversible capacity (790 mAh g-1 after 400 cycles at 1 A g-1) and excellent rate capability (694 mAh g-1 at 2 A g-1), which outperforms its bulk counterpart...
September 21, 2017: Chemistry: a European Journal
Hongyu Zhang, Ke Ye, Kai Zhu, Ruibai Cang, Jun Yan, Kui Cheng, Guiling Wang, Dianxue Cao
The porous FeVO4 is prepared by hydrothermal method and further modified by coating carbon to obtain the FeVO4/C with hierarchical pore structure, which are used as anodic electrodes in aqueous rechargeable magnesium ion battery. And the FeVO4/C material can not only improve the electrical conductivity by coating a carbon layer but also increase the specific surface area by hierarchical pore structure, which is more beneficial for magnesium ion insertion/deinsertion. Therefore, the aqueous rechargeable magnesium ion full battery is successfully constructed by FeVO4/C as anode, Mg-OMS-1 as cathode and in 1...
September 21, 2017: Chemistry: a European Journal
Dong Ren, Yun Shen, Yao Yang, Luxi Shen, Barnaby D A Levin, Yingchao Yu, David A Muller, Héctor D Abruña
Ni-rich LiNixMnyCo1-x-yO2 (x>0.5) (NMC) materials have attracted a great deal of interest as promising cathode candidates for Li-ion batteries (LIBs) due to their low cost and high energy density. However, several issues, including sensitivity to moisture, difficulty in reproducibly preparing well-controlled morphology particles and, poor cyclability, have hindered their large scale deployment; especially for electric vehicle (EV) applications. In this work, we have developed a uniform, highly stable, high-energy density, Ni-rich LiNi0...
September 22, 2017: ACS Applied Materials & Interfaces
Weiqi Yao, Jie Chen, Liang Zhan, Yanli Wang, Shubin Yang
A novel two-dimensional porous sandwich-like Si/carbon nanosheets are designed and successfully fabricated as anode for superior lithium storage, where porous Si nanofilm grows on the two sides of reduced grahene oxide (rGO) and then coated with a carbon layer (denoted as C/Si-rGO-Si/C). The coexistence of micropores and mesopores in C/Si-rGO-Si/C nanosheets offer a rapid Li+ diffusion rate, and the porous Si provides a short pathway for electric transportation. Meanwhile, the coated carbon layer not only can promote to form stable SEI layer, but also can improve the electric conductivity of nanoscale Si coupled with rGO...
September 22, 2017: ACS Applied Materials & Interfaces
Peng Ge, Xiao-Yu Cao, Hongshuai Hou, Sijie Li, Xiaobo Ji
One-dimensional Sb2Se3/C rods are prepared through self-assembly from the inducing of anisotropy, and the corresponding sodium storage behaviors are evaluated, presenting excellent electrochemical performances with superior cycle stability and rate capability. The Sb2Se3 delivers a high initial charge capacity of 657.6 mAh g-1 at current density of 0.2 A g-1 between 2.5 and 0.01 V. After 100 cycles, the reversible capacity of Sb2Se3/C remain 485.2 mAh g-1. Even at high rate current density of 2.0 A g-1, the charge capacity still remains 311...
September 22, 2017: ACS Applied Materials & Interfaces
Kristina D Chambers, Virginie Beausejour Ladouceur, Mark E Alexander, Robyn J Hylind, Laura Bevilacqua, Douglas Y Mah, Vassilios Bezzerides, John K Triedman, Edward P Walsh, Dominic J Abrams
BACKGROUND: The 2005 Bethesda Conference Guidelines advise patients with long QT syndrome against competitive sports. We assessed cardiac event rates during competitive and recreational sports, and daily activities among treated long QT syndrome patients. METHODS AND RESULTS: Long QT syndrome patients aged ≥4 years treated with anti-adrenergic therapy were included. Demographics included mechanism of presentation, corrected QT interval pretreatment, symptom history, medication compliance, and administration of QT-prolonging medications...
September 21, 2017: Journal of the American Heart Association
Haipeng Li, Zhengjun Liu, Shuang Yang, Yan Zhao, Yuting Feng, Zhumabay Bakenov, Chengwei Zhang, Fuxing Yin
ZnO/nitrogen-doped carbon nanotube (ZnO/NCNT) composite, prepared though a simple one-step sol-gel synthetic technique, has been explored for the first time as an anode material. The as-prepared ZnO/NCNT nanocomposite preserves a good dispersity and homogeneity of the ZnO nanoparticles (~6 nm) which deposited on the surface of NCNT. Transmission electron microscopy (TEM) reveals the formation of ZnO nanoparticles with an average size of 6 nm homogeneously deposited on the surface of NCNT. ZnO/NCNT composite, when evaluated as an anode for lithium-ion batteries (LIBs), exhibits remarkably enhanced cycling ability and rate capability compared with the ZnO/CNT counterpart...
September 21, 2017: Materials
Yidan Song, Lili Yu, Yuanrui Gao, Changdong Shi, Meiling Cheng, Xianmei Wang, Hong-Jiang Liu, Qi Liu
A zinc-based one-dimensional (1D) coordination polymer ([Zn(H2mpca)2(tfbdc)(H2O)], Zn-ODCP) has been synthesized and characterized by spectroscopic and physicochemical methods, single-crystal X-ray diffraction, and thermogravimetric analysis (H2mpca = 3-methyl-1H-pyrazole-4-carboxylic acid; H2tfbdc = 2,3,5,6-tetrafluoroterephthalic acid). Zn-ODCP shows blue luminescence in the solid state. When Zn-ODCP acts as an anode material for lithium ion batteries, it exhibits a good cyclic stability and a higher reversible capacity of 300 mAh g(-1) at 50 mA g(-1) after 50 cycles...
September 21, 2017: Inorganic Chemistry
Li Yee Then, C S Chidan Kumar, Huey Chong Kwong, Yip-Foo Win, Siau Hui Mah, Ching Kheng Quah, S Naveen, Ismail Warad
2-(Benzo-furan-2-yl)-2-oxoethyl 2-chloro-benzoate, C17H11ClO4 (I), and 2-(benzo-furan-2-yl)-2-oxoethyl 2-meth-oxy-benzoate, C18H14O5 (II), were synthesized under mild conditions. Their chemical and mol-ecular structures were analyzed by spectroscopic and single-crystal X-ray diffraction studies, respectively. These compounds possess different ortho-substituted functional groups on their phenyl rings, thus experiencing extra steric repulsion force within their mol-ecules as the substituent changes from 2-chloro (I) to 2-meth-oxy (II)...
July 1, 2017: Acta Crystallographica. Section E, Crystallographic Communications
Hong Sun, Kejie Zhao
Capacity and structural stability are often mutually exclusive properties of electrodes in Li-ion batteries: A gain in capacity is usually accompanied by the undesired large volumetric change of the host material upon lithiation. Polymer-derived ceramics, such as silicon oxycarbide (SiOC) of hybrid Si-O-C bonds, show an exceptional combination of high capacity and superior structural stability. We investigate the atomistic origins of the unique chemomechanical performance of carbon-rich SiOC using the first-principles theoretical approach...
September 20, 2017: ACS Applied Materials & Interfaces
Kewei Wang, Liming Yang, Xi Wang, Liping Guo, Guang Cheng, Chun Zhang, Shangbin Jin, Bien Tan, Andrew Cooper
Covalent triazine frameworks (CTFs) are normally synthesized by ionothermal methods. The harsh synthetic conditions and associated limited structural diversity do not benefit for further development and practical large-scale synthesis of CTFs. Herein we report a new strategy to construct CTFs (CTF-HUSTs) via a polycondensation approach, which allows the synthesis of CTFs under mild conditions from a wide array of building blocks. Interestingly, these CTFs display a layered structure. The CTFs synthesized were also readily scaled up to gram quantities...
September 19, 2017: Angewandte Chemie
Daming Zhu, Huaqiu Liu, Lixuan Tai, Xiaonan Zhang, Sheng Jiang, Shumin Yang, Lin Yi, Wen Wen, Xiaolong Li
Nowadays, porous materials become essential to many technological applications. In this account, 3-dimensional skeleton composite materials consisted of a core-shell amorphous porous carbon/multi-layer graphene are synthesized by chemical vapor deposition on Ni foam using a facile one-step growth method. The data suggest that these composites have not only outstanding electrical and mechanical properties of the multi-layer graphene but also the mesoporous characteristics of the amorphous carbon. Moreover, the composited carbon materials perfectly inherit the macroporous structure of Ni foam, and the amorphous carbon core in the skeleton serves as a cushion to buffer the volume variation after the removal of Ni...
September 19, 2017: ACS Applied Materials & Interfaces
Yuewen Liu, Ahmad Hassan Siddique, Heran Huang, Qile Fang, Wei Deng, Xufeng Zhou, Huanming Lu, Z P Liu
A new conductive carbon hybrid combining both graphene nanoscrolls and carbon nanotubes (rGNSs-CNTs) is prepared, and used to host Fe3O4 nanoparticles through an in situ synthesis method. As an anode material for LIBs, the obtained Fe3O4@rGNSs-CNTs shows good electrochemical performance. At a current density of 0.1 A g-1, the anode material shows a high reversible capacity of 1232.9 mAh g-1 after 100 cycles. Even at a current density of 1 A g-1, it still achieves a high reversible capacity of 812.3 mAh g-1 after 200 cycles...
September 19, 2017: Nanotechnology
Jingquan Sha, Peipei Zhu, Xiya Yang, Xueni Li, Xiao Li, Mingbo Yue, Kunfeng Zhou
A POMs templated 3D Ag-carbene framework with lvt-a topology was hydrothermally synthesized. The POMs templated MCF combining the advantages of POMs, MOFs, and carbene not only shows excellent thermal and chemical stabilities but also possesses a good discharge capacity of 481 mAh·g(-1) after 100 cycles applied as anode material in LIBs.
September 19, 2017: Inorganic Chemistry
Jun Yang, Yufei Zhang, Yizhou Zhang, Jinjun Shao, Hongbo Geng, Yu Zhang, Yun Zheng, Mani Ulaganathan, Zhengfei Dai, Bing Li, Yun Zong, Xiaochen Dong, Qingyu Yan, Wei Huang
2D Sulfur-doped TiSe2 /Fe3 O4 (named as S-TiSe2 /Fe3 O4 ) heterostructures are synthesized successfully based on a facile oil phase process. The Fe3 O4 nanoparticles, with an average size of 8 nm, grow uniformly on the surface of S-doped TiSe2 (named as S-TiSe2 ) nanoplates (300 nm in diameter and 15 nm in thickness). These heterostructures combine the advantages of both S-TiSe2 with good electrical conductivity and Fe3 O4 with high theoretical Li storage capacity. As demonstrated potential applications for energy storage, the S-TiSe2 /Fe3 O4 heterostructures possess high reversible capacities (707...
September 18, 2017: Small
Lalit Sharma, Prasant Kumar Nayak, Ezequiel de la Llave, Haomin Chen, Stefan Adams, Doron Aurbach, Prabeer Barpanda
Sodium iron fluorophosphate (Na2FeIIPO4F) was synthesized by economic solvothermal combustion technique using FeIII precursors, developing one-step carbon-coated homogeneous product. Synchrotron diffraction and Mössbauer spectroscopy revealed the formation of single-phase product assuming an orthorhombic structure (s.g. Pbcn) with FeII species. This FeIII precursor derived Na2FeIIPO4F exhibited reversible Na+ (de)intercalation with discharge capacity of 100 mAh/g at a rate of C/10 involving flat FeIII/FeII redox plateaus located at 2...
September 18, 2017: ACS Applied Materials & Interfaces
Meaghan L O'Donnell, Ingo Schaefer, Tracey Varker, Dzenana Kartal, David Forbes, Richard A A Bryant, Derrick Silove, Mark Creamer, Alexander McFarlane, Gin Mahli, Kim Felmingham, Miranda Van Hoof, Dusan Hadzi-Pavlovic, Angela Nickerson, Zachary Steel
Recent research has found that exposure to traumatic events may occur in certain patterns, rather than randomly. Person-centered analyses, and specifically latent class analysis, is becoming increasingly popular in examining patterns, or 'classes' of trauma exposure. This review aimed to identify whether there are consistent homogeneous subgroups of trauma-exposed individuals, and the relationship between these trauma classes and psychiatric diagnosis. A systematic review of the literature was completed using the databases EMBASE, MEDLINE (PubMed) and PsycINFO...
September 9, 2017: Clinical Psychology Review
Bryce L Geeraert, R Marc Lebel, Alyssa C Mah, Sean C Deoni, David C Alsop, Gopal Varma, Catherine Lebel
Sensitive and specific biomarkers of myelin can help define baseline brain health and development, identify and monitor disease pathology, and evaluate response to treatment where myelin content is affected. Diffusion measures such as radial diffusivity (RD) are commonly used to assess myelin content, but are not specific to myelin. Inhomogeneous magnetization transfer (ihMT) and multicomponent driven equilibrium single-pulse observation of T1 and T2 (mcDESPOT) offer quantitative parameters (qihMT and myelin volume fraction/VFm, respectively) which are suggested to have improved sensitivity to myelin...
September 12, 2017: NeuroImage
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