http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Streptomyces xinghaiensis sp. nov., isolated from marine sediment.
Zhao, Xin-Qing,Li, Wen-Jun,Jiao, Wen-Ce,Li, Yan,Yuan, Wen-Jie,Zhang, Yu-Qin,Klenk, Hans-Peter,Suh, Joo-Won,Bai, Feng-Wu Society for General Microbiology 2009 International journal of systematic and evolutiona Vol.59 No.11
<P>A novel actinomycete, strain S187(T), was isolated from a marine sediment sample collected from Xinghai Bay, Dalian, China. Growth occurred on ISP medium 2 containing 0-9 % NaCl and at pH 6.0-9.0 and 10-45 degrees C. The cell wall of strain S187(T) contained the isomer ll-diaminopimelic acid as the diagnostic diamino acid. The predominant menaquinones were MK-9(H(6)) (40.8 %), MK-9(H(8)) (38.2 %) and MK-9(H(2)) (8.8 %). The major fatty acids were iso-C(16 : 0) (29.6 %), anteiso-C(15 : 0) (14.0 %) and anteiso-C(17 : 0) (11.6 %). Cells contained phosphatidylethanolamine, phosphatidylinositol, phosphatidylglycerol, phosphatidylinositol mannosides and one unknown phospholipid. The G+C content of the genomic DNA was 72.01 mol%. The 16S rRNA gene sequence of the isolate had similarities of 98.1 and 97.5 % with those of Streptomyces flavofuscus NRRL B-8036(T) (=DSM 41426(T)) and Streptomyces albiaxialis DSM 41799(T), respectively, showing that the novel strain should be assigned to the genus Streptomyces. DNA-DNA hybridizations with the two above-mentioned Streptomyces species showed 31.4 and 46.9 % relatedness, respectively. Moreover, the three strains differed in some physiological and biochemical properties. Thus, on the basis of phenotypic and genotypic analyses, it is proposed that strain S187(T) represents a novel species of the genus Streptomyces, for which the name Streptomyces xinghaiensis sp. nov. is proposed; the type strain is S187(T) (=NRRL B-24674(T)=CCTCC AA 208049(T)=KCTC 19546(T)).</P>
Qing-dong Liu,Wen-qing Liu,Shi-jin Zhao 대한금속·재료학회 2013 METALS AND MATERIALS International Vol.19 No.4
3D atom probe (3DAP) combined with TEM is applied to characterize the nanostructure and composition of coarsening carbides that precipitate in a Nb-V micro-alloyed steel tempered at 650 °C for 4 h. The results indicate that high temperature tempering of the as-quenched lath-like martensitic structures leads to the coarsening of alloyed carbide in the recovered ferritic matrix. TEM characterization and EDS analysis show that the alloy carbides are typically spherical or ellipsoidal and are enriched with V, Nb and Mo. Crystallographic lattice overlap and distortion create a distinct optical Moiré pattern at the carbide/matrix boundary, as observed by HRTEM. 3DAP gives the compositional distribution at atomic scale in the coarsening carbide and the surrounding matrix. Non-carbide-forming elements such as Si and Al are depleted in the carbide and are enriched at the carbide/matrix heterophase interface. Carbide-forming elements such as Mn, V, Mo and Nb distribute heterogeneously in the whole carbide, leading to the formation of a Mn-, V- and Mo-enriched core and Mo-enriched external shell.
Heating Control Design of a Space Camera
Qing-Lei Zhao,Ke-Hui Long,Feng-Wei Guan,Liang Huang 보안공학연구지원센터 2015 International Journal of Signal Processing, Image Vol.8 No.4
When a space camera works on the track, it presents in vacuum environment, under the condition of low temperatures, the camera can only maintain its temperature level by absorption of radiation. If stayed in this environment for a long time, mechanical structure of the space camera may become brittle, lose strength, and an exfoliation phenomenon may appear, in addition, abnormal operation and malfunction of electronic equipments may also occur, these may affect imaging quality of the camera. In this paper, a heating control method is designed for a space flight off-axis camera. Firstly, heating control working platform of the camera is introduced, a design method of heating control is determined. After that, heating control treatment procedure is introduced. Finally, the ground temperature monitor is used to validate correctness of the method designed. The comparison diagram before and after thermal analysis and temperature data obtained from experiments are presented, results show that, the heating control method is simple and effective, it has wide applicability and strong generalization performance.
( Qing Zhao ),( Cheng Zhu Wu ),( Jae Kyoung Lee ),( Su Rong Zhao ),( Hong Mei Li ),( Qiang Huo ),( Tao Ma ),( Jin Zhang ),( Young Soo Hong ),( Hao Liu ) 한국미생물 · 생명공학회 2014 Journal of microbiology and biotechnology Vol.24 No.7
Triple-negative breast cancer (TNBC) possesses a higher rate of distant recurrence and a poorer prognosis than other breast cancer subtypes. Interestingly, most of the heat shock protein 90 (Hsp90) client proteins are oncoproteins, and some are closely related to unfavorable factors of TNBC patients. 17-Demethoxy-reblastatin (17-DR), a novel nonbenzoquinone- type geldanamycin analog, exhibited potent Hsp90 ATPase inhibition activity. In this study, the anticancer effects of 17-DR on TNBC MDA-MB-231 cells were investigated. These results showed that 17-DR inhibited cell proliferation, induced apoptosis, and suppressed cell invasion and migration in the MDA-MB-231 cells. Down-regulation of the key Hsp90-dependent tumor-driving molecules, such as RIP1 and MMP-9, by 17-DR may be related to these effects. Taken together, our results suggest that 17-DR has potential as a therapeutic agent for the treatment of TNBC.
A Data Placement Algorithm for Data Intensive Applications in Cloud
Qing Zhao,Congcong Xiong,Kunyu Zhang,Yang Yue,Jucheng Yang 보안공학연구지원센터 2016 International Journal of Grid and Distributed Comp Vol.9 No.2
Data layout is an important issue which aims at reducing data movements among data centers to improve the efficiency of the entire cloud system. This paper proposes a data-intensive application oriented data layout algorithm. It is based on hierarchical data correlation clustering and the PSO algorithm. The datasets with fixed location have been considered, and both the offline strategy and the online strategy for data layout have been given. As this proposed strategy is aimed at reducing the global amount of data transmissions, and the special permission of the datasets has been introduced, the cost of data transmission can be measured more reasonable. Simulation results show that compared with two classical strategies, our algorithm can reduce the amount of data transmission more effectively.
Qing Zhao,Xi Jin,Xiao hui Shi,Hui jun Yang,Min Zhang,Junwei Qiao 대한금속·재료학회 2023 METALS AND MATERIALS International Vol.29 No.8
The tribological behavior of TiZrHfNbTa refractory high-entropy alloy (RHEA) sliding against Si3N4ball was investigatedin the air, deionized water and seawater at room temperature as well as under dry condition at high temperature. The resultsshowed that the TiZrHfNbTa RHEA was composed of single BCC phase. The wear rate in air, deionized water and seawaterreached the maximum value of 3.02 × 10−4 mm3/(Nm), 2 × 10−4 mm3/(Nm) and 3.18 × 10−4 mm3/(Nm) at 10 N, respectively. Moreover, the wear rate in deionized water was much lower than that in air, while the wear rate in seawater was close to thatin air. The wear mechanisms were all transitioned from the abrasive wear to adhesive wear with increasing the normal load. At high temperature, the wear rate increased first and then decreased, reached the maximum value of 2.04 × 10–4 mm3/(Nm)at 500 ℃. In addition, oxidation occurred at 400 ℃. The wear mechanism changed from the abrasive wear to oxidation wearat high temperature.