http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Emission properties of sequentially deposited ultrathin CH3NH3PbI3/MoS2 heterostructures
Shao Ziyi,Xiao Junting,Guo Xiao,You Siwen,Zhang Yangyang,Li Mingjun,Song Fei,Zhou Conghua,Xie Haipeng,Gao Yongli,Sun Jiatao,Huang Han 한국물리학회 2022 Current Applied Physics Vol.36 No.-
Hybrid organic-inorganic perovskite materials have obtained considerable attention due to their exotic optoelectronic properties and extraordinarily high performance in photovoltaic devices. Herein, we successively converted the ultrathin PbI2/MoS2 into the CH3NH3PbI3/MoS2 heterostructures via CH3NH3I vapor processing. Atomic force microscopy (AFM)、Scanning electron microscopy (SEM) and X-ray photoemission spectroscopy (XPS) measurements prove the high-quality of the converted CH3NH3PbI3/MoS2. Both MoS2 and CH3NH3PbI3 related photoluminescence (PL) intensity quenching in CH3NH3PbI3/MoS2 implies a Type-II energy level alignment at the interface. Temperature-dependent PL measurements show that the emission peak position shifting trend of CH3NH3PbI3 is opposite to that of MoS2 (traditional semiconductors) due to the thermal expansion and electron-phonon coupling effects. The CH3NH3PbI3/TMDC heterostructures are useful in fabricating innovative devices for wider optoelectronic applications.
Song, Yingze,Zhao, Wen,Kong, Long,Zhang, Li,Zhu, Xingyu,Shao, Yuanlong,Ding, Feng,Zhang, Qiang,Sun, Jingyu,Liu, Zhongfan The Royal Society of Chemistry 2018 ENERGY AND ENVIRONMENTAL SCIENCE Vol.11 No.9
<P>Lithium-sulfur (Li-S) batteries are deemed as one of the most promising next-generation energy storage systems. However, their practical application is hindered by existing drawbacks such as poor cycling life and low Coulombic efficiency due to the shuttle effect of lithium polysulfides (LiPSs). We herein present an <I>in situ</I> constructed VO2-VN binary host which combines the merits of ultrafast anchoring (VO2) with electronic conducting (VN) to accomplish smooth immobilization-diffusion-conversion of LiPSs. Such synchronous advantages have effectively alleviated the polysulfide shuttling, promoted the redox kinetics, and hence improved the electrochemical performance of Li-S batteries. As a result, the sulfur cathode based on the VO2-VN/graphene host exhibited an impressive rate capability with ∼1105 and 935 mA h g<SUP>−1</SUP> at 1C and 2C, respectively, and maintained long-term cyclability with a low capacity decay of 0.06% per cycle within 800 cycles at 2C. More remarkably, favorable cyclic stability can be attained with a high sulfur loading (13.2 mg cm<SUP>−2</SUP>). Even at an elevated temperature (50 °C), the cathodes still delivered superior rate capacity. Our work emphasizes the importance of immobilization-diffusion-conversion of LiPSs toward the rational design of high-load and long-life Li-S batteries.</P>
A Real-Time Surveillance System for Vaccine Cold Chain Based o n Internet of Things Technology
Shao-jun Jiang,Zhi-lai Zhang,Wen-yan Song 한국정보처리학회 2023 Journal of information processing systems Vol.19 No.3
In this study, a real-time surveillance system using Internet of Things technology is proposed for vaccine coldchains. This system fully visualizes vaccine transport and storage. It comprises a 4G gateway module, lowpowerand low-cost wireless temperature and humidity collection module (WTHCM), cloud service softwareplatform, and phone app. The WTHCM is installed in freezers or truck-mounted cold chain cabinets to collectthe temperature and humidity information of the vaccine storage environment. It then transmits the collecteddata to a gateway module in the radiofrequency_physical layer (RF_PHY). The RF_PHY is an interface forcalling the bottom 2.4-GHz transceiver, which can realize a more flexible communication mode. The gatewaymodule can simultaneously receive data from multiple acquisition terminals, process the received datadepending on the protocol, and transmit the collated data to the cloud server platform via 4G or Wi-Fi. Thecloud server platform primarily provides data storage, chart views, short-message warnings, and otherfunctions. The phone app is designed to help users view and print temperature and humidity data concerningthe transportation and storage of vaccines anytime and anywhere. Thus, this system provides a new vaccinemanagement model for ensuring the safety and reliability of vaccines to a greater extent.
( Tongxiang Song ),( Xuelin Zhao ),( Yina Shao ),( Ming Guo ),( Chenghua Li ),( Weiwei Zhang ) 한국미생물생명공학회(구 한국산업미생물학회) 2019 Journal of microbiology and biotechnology Vol.29 No.6
It is well known that iron is critical for bacterial growth and pathogenic virulence. Due to chemical similarity, Ga<sup>3+</sup> competes with Fe3+ for binding to compounds that usually bind Fe<sup>3+</sup>, thereby interfering with various essential biological reactions. In our present study, gallium(III) nitrate [Ga(NO<sub>3</sub>)<sub>3</sub>] could repress the growth of V. splendidus Vs without complete inhibition. In the presence of Ga(NO<sub>3</sub>)<sub>3</sub>, the secretion of homogentisic acid-melanin (HGAmelanin) in V. splendidus Vs cells could be increased by 4.8-fold, compared to that in the absence of Ga(NO<sub>3</sub>)<sub>3</sub>. HGA-melanin possessed the ability to reduce Fe<sup>3+</sup> to Fe<sup>2+</sup>. In addition, HGA-melanin increased the mRNA levels of feoA and feoB, genes coding Fe2+ transport system proteins to 1.86- and 6.1-fold, respectively, and promoted bacterial growth to 139.2%. Similarly, the mRNA expression of feoA and feoB was upregulated 4.11-fold and 2.71-fold in the presence of 640 μM Ga(NO<sub>3</sub>)<sub>3</sub>, respectively. In conclusion, our study suggested that although Ga(NO<sub>3</sub>)<sub>3</sub> could interfere with the growth of V. splendidus Vs, it could also stimulate both the production of Fe<sup>3+</sup>-reducing HGA-melanin and the expression of feoA and feoB , which facilitate Fe<sup>2+</sup> transport in V. splendidus Vs.
Jian Song,Claudia Li,Shao Zhang,Kai Wang,Bo Meng,Xiaoyao Tan,Jaka Sunarso,Shaomin Liu 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.107 No.-
BaCeO3-based ceramics are a unique class of perovskites that exhibit protonic and oxygen ionic conduction,which are ideal for high temperature hydrogen separation applications. This work features Sc-dopedBCFe composites with nominal composition of BaCe0.70Fe0.30-xScxO3d (BCFSc) (x = 0, 0.05, 0.1, 0.15, and0.2) that exhibit enhanced thermal, chemical, and mechanical stability. The BCFSc20 (x = 0.20) hollowfiber membranes demonstrated the highest hydrogen and oxygen fluxes among the Sc-doped compositesof up to 0.32 and 0.20 mL min1 cm2, respectively, at 1000 C. The BCFSc20 hollow fibers also displayedexcellent stability under the hydrogen and oxygen permeation environments, while the permeation performanceof the other BCFSc samples with low Sc content gradually deteriorated over the 120-h stabilitytest.
Yu-Guo Yuan,Shao-Zheng Song,Meng-Ming Zhu,Zheng-Yi He,Rui Lu,Ting Zhang,Fei Mi,Jin-Yu Wang,Yong Cheng 아세아·태평양축산학회 2017 Animal Bioscience Vol.30 No.8
Objective: To create genetically modified goat as a biopharming source of recombinant human lacotoferrin (hLF) with transcription activator-like effector nucleases. Methods: TALENs and targeting vector were transferred into cultured fibroblasts to insert hLF cDNA in the goat beta-lactoglobulin (BLG) locus with homology-directed repair. The gene targeted efficiency was checked using sequencing and TE7I assay. The bi-allelic gene targeted colonies were isolated and confirmed with polymerase chain reaction, and used as donor cells for somatic cell nuclear transfer (SCNT). Results: The targeted efficiency for BLG gene was approximately 10%. Among 12 Bi-allelic gene targeted colonies, five were used in first round SCNT and 4 recipients (23%) were confirmed pregnant at 30 d. In second round SCNT, 7 (53%), 4 (31%), and 3 (23%) recipients were confirmed to be pregnant by ultrasound on 30 d, 60 d, and 90 d. Conclusion: This finding signifies the combined use of TALENs and SCNT can generate bi-allelic knock-in fibroblasts that can be cloned in a fetus. Therefore, it might lay the foundation for transgenic hLF goat generation and possible use of their mammary gland as a bioreactor for large-scale production of recombinant hLF.
Zheng, Feng,Ma, Lixian,Shao, Lihua,Wang, Gang,Chen, Fengzhe,Zhang, Ying,Yang, Song The Microbiological Society of Korea 2007 The journal of microbiology Vol.45 No.1
The Hantaan virus (HTNV) is an enveloped virus that is capable of inducing low pH-dependent cell fusion. We molecularly cloned the viral glycoprotein (GP) and nucleocapsid (NP) cDNA of HTNV and expressed them in Vero E6 cells under the control of a CMV promoter. The viral gene expression was assessed using an indirect immunofluorescence assay and immunoprecipitation. The transfected Vero E6 cells expressing GPs, but not those expressing NP, fused and formed a syncytium following exposure to a low pH. Monoclonal antibodies (MAbs) against envelope GPs inhibited cell fusion, whereas MAbs against NP did not. We also investigated the N-linked glycosylation of HTNV GPs and its role in cell fusion. The envelope GPs of HTNV are modified by N-linked glycosylation at five sites: four sites on G1 (N134, N235, N347, and N399) and one site on G2 (N928). Site-directed mutagenesis was used to construct eight GP gene mutants, including five single N-glycosylation site mutants and three double-site mutants, which were then expressed in Vero E6 cells. The oligosaccharide chain on residue N928 of G2 was found to be crucial for cell fusion after exposure to a low pH. These results suggest that G2 is likely to be the fusion protein of HTNV.
Experimental study on the mechanical property of coal and its application
Jiang, Ting T.,Zhang, Jian H.,Huang, Gang,Song, Shao X.,Wu, Hao Techno-Press 2018 Geomechanics & engineering Vol.14 No.1
Brazilian splitting tests, uniaxial compression tests and triaxial compression tests are carried out on the coal samples cored from Shanxi group $II_1$ coal seam of Jiaozuo coal mine, Henan province, China, to obtain their property parameters. Considering the bedding has notable effect on the property parameter of coal, the samples with different bedding angles are prepared. The effects of bedding on the anisotropic characteristics of the coal seam are investigated. A geological geomechanical model is built based on the geology characteristics of the Jiaozuo coal mine target reservoir to study the effects of bedding on the fracture propagations during hydraulic fracturing. The effects of injection pressure, well completion method, in-situ stress difference coefficient, and fracturing fluid displacement on the fracture propagations are investigated. Results show bedding has notable effects on the property parameters of coal, which is the key factor affecting the anisotropy of coal. The hydraulic cracks trends to bifurcate and swerve at the bedding due to its low strength. Induced fractures are produced easily at the locations around the bedding. The bedding is beneficial to form a complicated fracture network. Experimental and numerical simulations can help to understand the effects of bedding on hydraulic fracturing in coalbed methane reservoirs.