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| 1 | Cloning, expression and biocharacterization of OfCht5, the chitinase from the insect Ostrinia furnacalis显示文摘Chitinase 在几丁质催化 -1,4-glycosidic 连接并且由于它吸引了研究兴趣为 N 乙酰的准备是一个潜在的杀虫剂目标和一个酶的工具 -- D-glucosamine。一只单个昆虫包含编码 chitinases 的多重基因,它在域体系结构,表达式模式,生理的角色和生物化学的性质变化。此处, OfCht5, glycoside hydrolase 家庭从普遍鳞翅类的害虫 Ostrinia furnacalis 的 18 chitinase,被克隆,在酵母 Pichia pastoris 表示了并且生物化学地在一次尝试描绘了便于害虫控制和 biomaterial 准备。互补 DNA 顺序分析显示 OfCHT5 由 1 665-bp 核苷酸的一个开的读物框架组成了。系统发生的分析建议 OfCht5 属于这个组我昆虫 chitinases。在 Pichia pastoris 的 OfCht5 的表示与甲醇在正式就职的 120 h 以后导致了最高特定的活动。通过纯化的二步,由铵硫酸盐降水和金属 chelating 层析组成, recombinant OfCht5 的大约 7 mg 从 1 L 文化上层清液被净化到同质。OfCht5 有效地把胶体的几丁质变换成 chitobiose,但是向几丁质举办了相对低的活动。什么时候 chitooligosaccharides [(GlcNAc ) n, n= 36 ] 被用作底层, OfCht5 被观察拥有最高催化的效率参数向(GlcNAc ) 4 并且 predominantely hydrolyzed 从非减少的结束的第二张 glycosidic 契约。和 -N-acetyl-D-hexosaminidase OfHex1, OfCht5 在产出 N 乙酰的几丁质降级完成了它的最高的效率 -- D-glucosamine,珍贵药理学试剂和食物补充,在在 9 的范围的 OfCht5 对 OfHex1 的臼齿的集中比率以内:115:1。这个工作为杀虫剂和另外的应用提供一种选择给 chitinase 的存在准备。 | Qingyue Wu Tian Liu Qing Yang | 2013 | Insect Science2013，20，2： | 19 |
| 2 | Atmospheric HULIS and its ability to mediate the reactive oxygen species (ROS): A review显示文摘Atmospheric humic-like substances(HULIS) are not only an unresolved mixture of macroorganic compounds but also powerful chelating agents in atmospheric particulate matters(PMs); impacting on both the properties of aerosol particles and health effects by generating reactive oxygen species(ROS). Currently, the interests of HULIS are intensively shifting to the investigations of HULIS-metal synergic effects and kinetics modeling studies, as well as the development of HULIS quantification, findings of possible HULIS sources and generation of ROS from HULIS. In light of HULIS studies, we comprehensively review the current knowledge of isolation and physicochemical characterization of HULIS from atmospheric samples as well as HULIS properties(hygroscopic, surface activity, and colloidal) and possible sources of HULIS.This review mainly highlights the generation of reactive oxygen species(ROS) from PMs, HULIS and transition metals, especially iron. This review also summarized the mechanism of ironorganic complexation and recent findings of OH formation from HULIS-metal complexes. This review will be helpful to carry out the modeling studies that concern with HULIS-transition metals and for further studies in the generation of ROS from HULIS-metal complexes. | Myat Sandar Win Zhengyang Tian Hui Zhao Kai Xiao Jiaxian Peng Yu Shang Minghong Wu Guangli Xiu Senlin Lu Shinich Yonemochi Qingyue Wang | 2018 | Journal of Environmental Sciences2018，30，9： | 6 |
| 3 | Circular cladding waveguides in Pr:YAG fabricated by femtosecond laser inscription:Raman,luminescence properties and guiding performance显示文摘We report on the fabrication of circular cladding waveguides with cross-section diameters of 60−120μm in Pr:YAG crystal by applying femtosecond laser inscription.The fabricated waveguides present 2D guidance on the cross-section and fairly low propagation losses.Multiple high-order guiding modes are observed in waveguides with different diameters.Corresponding simulation results reveal the origin of a specific kind of guiding modes.Confocal micro-Raman(μ-Raman)experiments demonstrate the modification effects in femtosecond laser affected areas and ascertain the refractive index induced guiding mechanism.In addition,luminescence emission properties of Pr3+ions at waveguide volume are well preserved during the femtosecond laser inscription process,which may result in a potential high-power visible waveguide laser. | Quanxin Yang Hongliang Liu Shan He Qingyu Tian Bin Xu Pengfei Wu | 2021 | Opto-Electronic Advances2021，4，2： | 4 |
| 4 | In-situ observation of electrical tree evolution in epoxy dielectrics with internal cracks显示文摘Gas-filled internal crack might appear in thermoset materials like epoxy resin during the equipment manufacturing,which would become a vulnerable local region to initiate the electrical tree,thus prone to cause insulation failure.The withstand voltage test was carried on epoxy samples with artificial cracks based on a rod-plane electrode arrange-ment.Simultaneously,surface state variation and tree evolution with crack were observed by an optical microscope in conjunction with a charge-coupled device camera.The changes in morphology and chemical status of the crack surface were characterized by scanning electron microscopy,laser Raman spectrometer and energy dispersive spec-trometer,respectively.It was found that the erosion and tree started from the borderline of crack under a relatively low electric field strength;however,the area near the electrode had relatively little damage.The breaking of epoxy molecular chains coarsens the crack surface and further forms deep channels on a micro-level,which is the forerunner of the electrical tree inception.Based on these,the initiation mechanisms of the crack-induced electrical tree and the reasons for the erosion near the borderline have been revealed.This study provides a train thought for the polymer degradation opening up into the initial tree channel during tree evolution processes. | Zehua Wu Huidong Tian Sijia Zhu He Li Qingyu Wang Zongliang Xie Peng Liu Zongren Peng | 2021 | High Voltage2021，6，2： | 3 |
| 5 | High power and energy generation in a Nd:YAG single-crystal fiber laser at 1834 nm显示文摘We report on a diode-end-pumped high-power and high-energy Nd:YAG single-crystal fiber laser at 1834 nm.Two 808 nm diodes injecting about 58 W pump power into the Nd:YAG fiber have generated 3.28 W continuouswave and 1.66 W Cr:ZnSe-based passively Q-switched lasers. Slope efficiencies with respect to pump powers are8.7% for the continuous-wave laser and 4.9% for the Q-switched laser. The extracted maximum pulse energy is about 266.9 μJ, and the corresponding maximum pulse peak power is 2.54 kW. These performances greatly surpass previous results regarding this specific laser emission because the laser gain medium in the form of fiber can significantly mitigate thermally induced power saturation thanks to its significantly reduced thermal lensing effect. Single-crystal fiber lasers show great potential for high average power, pulse energy, and peak power. | YAQI CAI BIN XU YUNSHAN ZHANG QINGYU TIAN XIAODONG XU QINGSONG SONG DONGZHEN LI JUN XU IVAN BUCHVAROV | 2019 | Photonics Research2019，7，2： | 2 |
| 6 | GIS-based emission inventories of urban scale: A case study of Hangzhou, China显示文摘 | Qingyu Zhang Yumei Wei Weili Tian Kemin Yang | 2008 | Atmospheric Environment2008，，20： | 2 |
| 7 | An improved least mean square/fourth direct adaptive equalizer for under-water acoustic communications in the Arctic显示文摘An improved least mean square/fourth direct adaptive equalizer(LMS/F-DAE)is proposed in this paper for underwater acoustic communication in the Arctic.It is able to process complex-valued baseband signals and has better equalization performance than LMS.Considering the sparsity feature of equalizer tap coefficients,an adaptive norm(AN)is incorporated into the cost function which is utilized as a sparse regularization.The norm constraint changes adaptively according to the amplitude of each coefficient.For small-scale coefficients,the sparse constraint exists to accelerate the convergence speed.For large-scale coefficients,it disappears to ensure smaller equalization error.The performance of the proposed AN-LMS/F-DAE is verified by the experimental data from the 9th Chinese National Arctic Research Expedition.The results show that compared with the standard LMS/F-DAE,AN-LMS/F-DAE can promote the sparse level of the equalizer and achieve better performance. | Yanan Tian Xiao Han Jingwei Yin Hongxia Chen Qingyu Liu | 2020 | Acta Oceanologica Sinica2020，39，9： | 1 |
| 8 | Preventing welding hot cracking by welding with an intensive trailing cooler显示文摘 | Tian Xitang Shi Qingyu | 2000 | Journal of Materials Processing Technology2000，97，2： | 1 |
| 9 | Exter- nal costs from electricity generation of China up to 2030 in energy and abatement scenarios 显示文摘 | Zhang Qingyu Tian Weili Wei Yumei | 2007 | Energy Policy2007，35，8： | 1 |
| 10 | Base-Promoted Synthesis of 3-Alkenyl-2-pyridones from N-Propargyl-β-enaminones and Aryl Aldehydes显示文摘Main observation and conclusion In this article,we report a base-promoted sequential cyclization/aldol-type condensation/isomerization cascade reaction of N-propargyl-β-enaminones with aryl aldehydes.The key step in this protocol is the generation of 1,4-oxazepine anions from N-propargyl-β-enaminones under basic conditions,which are captured by aryl aldehydes.The method allows the formation of one pyridone core and one C—C double bond in“one pot”,and the preparation of a variety of densely decorated pyridone derivatives in moderate to good yields with broad functional group tolerance. | Qingyu Tian Shangyun Xiao Guolin Cheng | 2021 | Chinese Journal of Chemistry2021，39，10： | 0 |
| 11 | Revisiting the capacity-fading mechanism of P2-type sodium layered oxide cathode materials during high-voltage cycling显示文摘P2-type sodium layered oxide cathode (Na_(2/3)Ni_(1/3)Mn_(2/3)O_(2)P2-NNMO) has attracted great attention as a promising cathode material for sodium ion batteries because of its high specific capacity. However, this material suffers from a rapid capacity fade during high-voltage cycling. Several mechanisms have been proposed to explain the capacity fade, including intragranular fracture caused by the P2-O2 phase transion, surface structural change, and irreversible lattice oxygen release. Here we systematically investigated the morphological, structural, and chemical changes of P2-NNMO during high-voltage cycling using a variety of characterization techniques. It was found that the lattice distortion and crystal-plane buckling induced by the P2-O2 phase transition slowed down the Na-ion transport in the bulk and hindered the extraction of the Na ions. The sluggish kinetics was the main reason in reducing the accessible capacity while other interfacial degradation mechanisms played minor roles. Our results not only enabled a more complete understanding of the capacity-fading mechanism of P2-NNMO but also revealed the underlying correlations between lattice doping and the moderately improved cycle performance. | Meidan Jiang Guannan Qian Xiao-Zhen Liao Zhouhong Ren Qingyu Dong Dechao Meng Guijia Cui Siqi Yuan Sang-Jun Lee Tian Qin Xi Liu Yanbin Shen Yu-Shi He Liwei Chen Yijin Liu Linsen Li Zi-Feng Ma | 2022 | Journal of Energy Chemistry2022，31，6： | 0 |
| 12 | Numerical study of the seasonal salinity budget of the upper ocean in the Bay of Bengal in 2014显示文摘Impact factors on the salinity budget, especially the eddy salt fluxes and smaller-scale diffusive salt fluxes for the upper 50 m of the Bay of Bengal(BoB) in 2014 are investigated using a box model based on the Regional Ocean Modeling System(ROMS) daily outputs. The model results reproduce that the precipitation and river runoff s are the dominant factors modulating the sharp salinity decrease during the summer monsoon season. The analysis shows that the salinity increase after the summer monsoon is mostly due to the meridional advective and diffusive salt fluxes. The vertical advective salt flux, which is sensitive to the different signals of the wind stress curl, plays an important role in balancing the salinity change induced by the meridional advective salt flux during both the summer and winter monsoon seasons. Distinctive spatial mesoscale structures are presented in the eddy salt flux throughout the year, and their contributions are sizeable(over 30% in the meridional direction and about 10%–30% in the vertical direction). The meridional eddy salt flux is larger in the monsoon seasons than that in the inter-monsoon seasons, and in a positive pattern near the western boundary during the winter monsoon and autumn inter-monsoon. The vertical eddy salt flux makes an important contribution to the salinity budget, especially along the coastal area and around the Andaman and Nicobar Islands. The vertical eddy salt flux becomes large when a tropical cyclone passes the area. | Qingyue WANG Changming DONG Junde LI Jingsong YANG Qing TIAN | 2021 | Journal of Oceanology and Limnology2021，39，4： | 0 |
| 13 | Metabolite acetyl-L-carnitine participates in Bifidobacterium animalis F1-7 to ameliorate atherosclerotic inflammation by downregulating theTLR4/NF-κB pathway显示文摘This study aimed to explore the effect of Bifidobacterium animalis F1-7 on the improvement of atherosclerotic inflammation.Arteriosclerosis model ApoE^(-/-)mice were orally administered with B.animalis F1-7 for 12 weeks.The probiotic intervention reduced the plaque areas in aorta and the accumulation of macrophages,and downregulated the expression of toll-like receptor 4(TLR4)/nuclear factorκB(NF-κB)pathway to reduce the levels of inflammatory factors.The widely-targeted metabolomics analysis showed that acetyl-L-carnitine(ALC)in the intestine of atherosclerotic mice was significantly increased after B.animalis F1-7 intervention.Correlation analysis proved that ALC was associated with atherosclerotic inflammatory response.By using oxidized low density lipoprotein induced macrophage foam cells,we further verified that ALC could reduce lipid accumulation and inflammatory response in foam cells by downregulating the TLR4/NF-κB pathway.Finally,our results revealed that B.animalis F1-7 upregulated the metabolite ALC to downregulate the inflammatory responses,leading to the reduction of plaque accumulation of atherosclerosis. | Xi Liang Zhe Zhang Xiaoying Tian Qingyu Cui Haiyan Lu Maozhen Zhao Tongjie Liu Huaxi Yi Pimin Gong Lanwei Zhang | 2024 | Food Science and Human Wellness2024，13，2： | 0 |
| 14 | A Scalable Synthesis of 6,19-Dihydroxyandrostenedione显示文摘从商业地可得到的 19-hydroxyandrostenedione 开始,为 6,19-dihydroxyandrostenedione 的准备的一个实际协议被报导。这混合物是为 cyclocitrinols 的合成的关键中介。与到钥匙走的 allylic 酒精的 stereospecific epoxidation 和后面的异构化,一个六步的过程在高产量提供了需要的产品。没有勤劳层析的需要,顺序对按比例增加容易。 | Yubo Yan Ting Li Tao Liu Qingyu Dou Kai Ding Weisheng Tian | 2013 | Chinese Journal of Chemistry2013，31，1： | 0 |
| 15 | Research on the dynamic characteristics of electric field distribution of the±1100 kV Ultra high voltage converter transformer valve‐side bushing using weakly ionised gas conductance model显示文摘Ultra high voltage(UHV)converter transformer valve‐side bushings are the key equipment indirect current(DC)transmission projects,and are subjected to high voltage and large current with large number of harmonics simultaneously.The electric field distribution of converter transformer valve‐side bushings is time‐dependent under DC voltage,polarity reversal voltage and actual voltage waveforms,and the electric and temperature field are coupling with each other in actual operation.The dynamic char-acteristics of the surface charges and the electric field distribution of China's first�1100 kV epoxy/paper-SF6 composite insulation converter trans former valve‐side bushing under 2 h DC withstand test voltage and polarity reversal voltage were analysed considering the natural ionisation,drifting,diffusion and recombination processes of positive and negative ions in SF6 gas and air.The time‐dependent electro‐thermal coupling field of the bushing under the actual voltage waveform in one cycle was ob-tained.The rationality of the simulation method adopted was verified through type tests of the UHV converter transformer valve‐side bushing.The simulation results of the paper can provide a theoretical foundation for the design of converter transformer valve‐side bushings and it is of great significance to ensure the safe operation of converter stations. | Qingyu Wang Peng Liu Huidong Tian Gengsheng Xie Zongren Peng Xi Yang | 2022 | High Voltage2022，7，2： | 0 |
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