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中国氯碱 2004年第3期 10-12页

作者：刘志新马艳梅徐华安黑龙江齐化化工有限责任公司黑龙江齐齐哈尔161033

阐述了高表观密度和适中吸油率PVC树脂在化学建材业的使用效果。并分析了在生产树脂过程中影响高表观密度和适中吸油率的因素,采取适当的搅拌强度、搅拌器形式、复合分散剂体系及用量、密闭投料方式、控制适合的pH值等措施可获得满意的... 详细信息

阐述了高表观密度和适中吸油率PVC树脂在化学建材业的使用效果。并分析了在生产树脂过程中影响高表观密度和适中吸油率的因素,采取适当的搅拌强度、搅拌器形式、复合分散剂体系及用量、密闭投料方式、控制适合的pH值等措施可获得满意的产品。

关键词：悬浮PVC树脂表观密度吸油率影响因素聚氯乙烯

武定鸡和大围山微型鸡肌苷酸含量及ADSL基因表达差异研究

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中国家禽 2017年第14期39卷 7-10页

作者：豆腾飞汪善荣佟荟全刘丽仙谷大海徐志强李琦华贾俊静葛长荣云南农业大学动物科学技术学院云南昆明650201 云南农业大学云南农村干部学院云南昆明650201 云南农业大学食品科学技术学院云南昆明650201

为研究不同云南地方鸡种肌苷酸含量与腺苷琥珀酸裂解酶(ADSL)基因m RNA表达差异,对武定鸡和大围山微型鸡肌肉组织中肌苷酸含量和ADSL m RNA表达量进行了检测。结果显示,武定鸡肌肉中肌苷酸含量显著高于大围山微型鸡,且同一鸡种中肌苷酸... 详细信息

为研究不同云南地方鸡种肌苷酸含量与腺苷琥珀酸裂解酶(ADSL)基因m RNA表达差异,对武定鸡和大围山微型鸡肌肉组织中肌苷酸含量和ADSL m RNA表达量进行了检测。结果显示,武定鸡肌肉中肌苷酸含量显著高于大围山微型鸡,且同一鸡种中肌苷酸含量因性别、部位、日龄的不同表现出较大差异;武定鸡肌肉中ADSL m RNA表达量均高于大围山微型鸡,且ADSL m RNA表达量与肌苷酸含量呈正相关。表明ADSL基因是影响家禽肉品质的重要候选基因。

关键词：武定鸡大围山微型鸡肌苷酸含量 ADSL基因

Using laser confocal scanning microscope to study ischemia-hypoxia injury in rat brain slice

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Chinese Science Bulletin 2000年第1期45卷 49-51页

作者： WANG Xiaoying XING Hong HE qihua xu Jialing WU Benjie Department of Biophysics Beijing Medical UniversityBeijing 100083China Analytic Center of Medico-Pharmacy Beijing Medical UniversityBeijing 100083China

The level of lipid peroxidation and cellular necrosis in rat living brain slices during brain ischemia-hypoxia injury have been observed using a laser confocal scanning microscope (LCSM) with double labeling of fluorescent probes D-399 (2, 7-dichlorofluorescin diacetate) and propidium iodide (Pl). The hypoxia and/or reoxygenation injury in rat brain slices is markedly decreased by pretreatment with L-NG-nitro-arginine (L-NNA) and N-acetylcysteine (NAC), showing that the nitric oxide (NO) and other free radicals play an important role in brain ischemia-hypoxia injury.

关键词： laser confocal scanning microscope brain ischemia-hypoxia injury lipid peroxide 2 7-dichIorofluorescin diacetate.

Spontaneously coherent orbital coupling of counterrotating exciton polaritons in annular perovskite microcavities

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Light(Science & Applications) 2021年第3期10卷 401-408页

作者： Jun Wang Huawen xu Rui Su Yutian Peng Jinqi Wu Timothy C.H.Liew qihua Xiong Division of Physics and Applied Physics School of Physical and Mathematical SciencesNanyang Technological UniversitySingaporeSingapore State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics Tsinghua UniversityBeijingChina MajuLab International Joint Research Unit UMI 3654CNRSUniversite Cote d'AzurSorbonne UniversiteNational University of SingaporeNanyang Technological UniversitySingaporeSingapore Beijinq Academy of Quantum Information Sciences Beiiinq 100193P.R.China

Exciton-polariton condensation is regarded as a spontaneous macroscopic quantum phenomenon with phase ordering and collective *** engineering artificial annular potential landscapes in halide perovskite semiconductor microcavities,we experimentally and theoretically demonstrate the room-temperature spontaneous formation of a coherent superposition of exciton-polariton orbital states with symmetric petal-shaped patterns in real space,resulting from symmetry breaking due to the anisotropic effective potential of the birefringent perovskite *** lobe numbers of such petal-shaped polariton condensates can be precisely controlled by tuning the annular potential *** petal-shaped condensates form in multiple orbital states,carrying locked alternating nphase shifts and vortex-anti vortex superposition cores,arising from the coupling of counterrotating exciton-polaritons in the confined circular *** geometrically patterned microcavity exhibits promise for realizing room-temperature topological polaritonic devices and optical polaritonic switches based on periodic annular potentials.

关键词： tuning annular coherent

Determining the optimum range of soil Olsen P for high P use efficiency, crop yield, and soil fertility in three typical cropland soils

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Pedosphere 2020年第6期30卷 832-843页

作者： qihua WU Shuxiang ZHANG Gu FENG Ping ZHU Shaomin HUANG Boren WANG Minggang xu Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences/National Engineering Laboratory for Improving Quality of Arable LandBeijing 100081China Guangdong Provincial Bioengineering Institute (Guangzhou Sugarcane Industry Research Institute)/Guangdong Key Laboratory of Sugarcane Improvement and BiorefineryGuangzhou 510316China College of Resources and Environmental Sciences China Agricultural UniversityBeijing 100094China Centre of Agricultural Environment and Resources Jilin Academy of Agricultural SciencesChangchun 130033China Institute of Plant Nutrition Resources and EnvironmentHenan Academy of Agricultural SciencesZhengzhou 450002China

Soil Olsen P level has a major influence on crop yield,efficient P utilization,and soil *** this study,the optimum Olsen P range was determined from long-term(1990–2012)field experiments in three typical soil types of China under single cropping of maize or double cropping of maize and *** critical soil Olsen P value for crop yield was evaluated using three different models,and the relationships among P use efficiency(PUE),Olsen P,and total P were *** agronomic critical soil Olsen P values obtained from the three models for the neutral soil of Gongzhuling and the calcareous soil of Zhengzhou were similar;however,the values from the linear-linear and linear-plateau models for both maize and wheat were substantially lower than those from the Mitscherlich model for the acidic soil of *** PUE response change rates(linear equation slopes)under different soil Olsen P levels were small,indicating slight or no changes in the PUE as the soil Olsen P increased in all three soils.A comparison of the Olsen P levels that achieved the maximal PUE with the agronomic critical values derived from the three models indicated that the linear-plateau model exhibited the best *** regression equation coefficients of Olsen P response to total P decreased as follows:Zhengzhou(73 mg g-1)>Qiyang(65 mg g-1)>Gongzhuling(55 mg g-1).The Olsen P level increased as the total P increased,which may result in a decrease in *** achieve a relatively high crop yield,PUE,and soil fertility,the optimum Olsen P range should be 13–40,10–40,and 29–40 mg kg-1 at Gongzhuling,Zhengzhou,and Qiyang,respectively.

关键词： critical Olsen P value efficient P utilization long-term fertilization P management response curve soil type

空中目标动态电磁散射数据仿真系统设计与实现

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现代防御技术 2024年第2期52卷 163-171页

作者：商城徐志明张杨张楷煜吴其华朱义奇艾小锋国防科技大学电子科学学院湖南长沙410073 中国人民解放军63801部队四川西昌615000

电磁散射数据是目标识别研究的基础,但由于试验测量成本高、可重复性差等问题,空中目标电磁散射实测数据十分有限。基于去遮挡的N点模型和电磁计算数据插值研究了空中目标动态电磁散射数据仿真方法,设计了空中目标动态电磁数据仿真系统... 详细信息

电磁散射数据是目标识别研究的基础,但由于试验测量成本高、可重复性差等问题,空中目标电磁散射实测数据十分有限。基于去遮挡的N点模型和电磁计算数据插值研究了空中目标动态电磁散射数据仿真方法,设计了空中目标动态电磁数据仿真系统,该系统将电磁散射仿真与实际飞行场景相结合,支持场景自定义和空中目标三维模型库扩展。分析了飞机和巡航导弹2类目标仿真数据及成像结果,结果验证了仿真方法正确性和系统有效性,可为研究实际场景下的空中目标识别提供支撑。

关键词：空中目标电磁散射数据宽带雷达仿真系统自动目标识别散射中心模型

Tribological behavior of shape memory cyanate ester materials and their tunable friction mechanism

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Friction 2023年第10期11卷 1794-1803页

作者： Zhangzhang TANG Lihe GUO Mingkun xu Hongwei RUAN Jing YANG Tingmei WANG Jianqiang ZHANG qihua WANG Yaoming ZHANG Key Laboratory of Science and Technology on Wear and Protection of Materials Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China College of Petrochemical Technology Lanzhou University of TechnologyLanzhou 730050China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

High-performance polymer friction materials with tunable tribological behavior to fit varied work conditions remain a challenge of widespread interest for a variety of *** memory polymer exhibits morphing and modulus changing over temperature changing provides a promising material to adjust the friction ***,we investigated the tribological properties of shape memory cyanate ester(SMCE)under different *** SMCE exhibits the tribological behavior of good friction material with stable high coefficient of friction(COF)and a low wear ***,the COF increases and wear rate decreases with the temperature increasing show the tunable friction property of the *** propose a new model of wear-compensation through shape recovery to explain the adjustable friction behavior of thermal-responsive polymer from the aspect of shape recovery and energy *** study provides a high-performance friction material and paves the route for the application of shape memory polymer(SMP)in tribology field with tunable property.

关键词： tribological behavior shape memory polymer cyanate ester tunable friction wear rate

Polarity-activated super-resolution imaging probe for the formation and morphology of amyloid fibrils

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Nano Research 2020年第9期13卷 2556-2563页

作者： Zheng Lv Li Li Zhongwei Man Zhenzhen xu Hongtu Cui Rui Zhan qihua He Lemin Zheng Hongbing Fu Beijing Key Laboratory for Optical Materials and Photonic Devices Capital Normal UniversityBeijing 100048China Tianjin Key L aboratory of Molecular Optoelectronic Sciences Institute of Molecular PlusTianjin UniversityTianjin 300072China 3 The Institute of Cardiovascular Sciences and Institute of Systems BiomedicineSchool of Basic Medical SciencesKey Laboratory of Molecular Cardiovascular Sciences of Ministry of Education NHC Key Laboratory of Cardiovascular Molecular Biology and Regulatory PeptidesHealth Science CenterPeking UniversityBeijing 100191China China National Clinical Research Center for Neurological Diseases Tiantan HospitalAdvanced Innovation Center for Human Brain ProtectionThe Capital Medical UniversityBeijing 100050China

The formation of amyloid plaques usually occurs in the early-stage of Alzheimer’s disease(AD).Stimulated emission depletion(STED)imaging provided a powerful tool for visualizing amyloid structures on the nanometer ***,many commercial probes adopted in detecting amyloid fibrils are inapplicable to STED imaging,owing to their unmatched absorption and emission wavelengths,small Stokes'shift,easy photo-bleaching,***,we demonstrated a polarity-activated STED probe based on an intramolecular charge transfer donor(D)-7c-acceptor(A)*** electron-rich carbazole group and the electron-poor pyridinium bromide group,linked by 7i-conjugated thiophen-bridge,ensure strong near infrared(NIR)emission with a Stokes'shift larger than 200 *** tiny change in polarity before and after binding with amyloid plaques leads to a transition from weakly emission charge-transfer(CT)state(Φ<0.04)to highly emissive locally-excited(LE)state(Φ=0.57),giving rise to a fluorescence Turn-On *** with large Stokes'shift,good photostability and high depletion efficiency,the super-resolution imaging of the formation and morphology of amyloid fibrils in vitro based on this probe was realized with a lateral spatial resolution better than 33 nm at an extremely low depletion ***,the ex-vivo super-resolution imaging of(E)-1-butyl-4(2-(5-(9-ethyl-9Hcarbazol-3-yl)thiophen-2-yl)vinyl)pyridinium bromide(CTPB)probe in Aβ plaques in the brain slices of a Tg mouse was *** research provides a demonstration of the super resolution imaging probe of amyloid fibrils based on polarity-response mechanism,providing a new approach to the development of future amyloid probes.

关键词： polarity-activated amyloid fibrils super-resolution imaging charge transfer near infrared(NIR)emission

Controllable vortex lasing arrays in a geometrically frustrated exciton-polariton lattice at room temperature

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National Science Review 2023年第1期10卷 196-204页

作者： Jun Wang Yutian Peng Huawen xu Jiangang Feng Yuqing Huang Jinqi Wu Timothy C.H.Liew qihua Xiong Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University Department of Optical Science and Engineering and Shanghai Frontiers Science Research Base of Intelligent Optoelectronics and Perception Fudan University State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics Tsinghua University Beijing Academy of Quantum Information Sciences

Quantized vortices appearing in topological excitations of quantum phase transition play a pivotal role in strongly correlated physics involving the underlying confluence of superfluids,Bose-Einstein condensates and *** polaritons as bosonic quasiparticles have enabled studies of non-e quilibrium quantum gases and ***-polariton condensates in artificial lattices intuitively emulate energy-band structures and quantum many-body effects of condensed matter,underpinning constructing vortex lattices and controlling quantum fluidic ***,we harness exciton-polariton quantum fluids of light in a frustrated kagome lattice based on robust metal-halide perovskite microcavities,to demonstrate vortex lasing arrays and modulate their configurations at room *** energy-momentum spectra unambiguously reveal massless Dirac bands and quenched kinetic-energy flat bands coexisting in kagome lattices,where polariton condensates exhibit prototypical honeycomb and kagome spatial *** coherence investigations illustrate two types of phase textures of polariton condensates carrying ordered quantized-vortex arrays and π-phase shifts,which could be selected when needed using lasing emission *** findings offer a promising platform on which it is possible to study quantum-fluid correlations in complex polaritonic lattices and highlight feasible applications of structured light.

关键词： vortex lasing exciton–polariton lattice Bose–Einstein condensation the orbital angular momentum of light geometric frustration perovskite semiconductor

Transparent perovskite glass-ceramics for visual optical thermometry

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Journal of Rare Earths 2021年第6期39卷 712-717,I0004页

作者： qihua Yang Lei Zhao Zhaohui Fang Ze Yang Jiangyan Cao Yiyu Cai Dacheng Zhou xue Yu Jianbei Qiu xuhui xu Faculty of Materials Science and Engineering Kunming University of Science and TechnologyKunming 650093China School of Physics and Opto-Electronic Technology Baoji University of Arts and SciencesBaoji 721016China Key Laboratory of Advanced Materials of Yunnan Province Kunming 650093China

Optical thermometers have aroused considerable attention in recent years,and the increasing demand of sensitivity for practical application encourages the investigation on developing innovative non-contact optical thermo metric materials with higher sensitivity and *** quantum dots(QDs)with excellent temperature-dependence optical properties,provide a feasible approach to realizing the detection of temperature change,however,their poor high temperature thermal stability and the facile realization to obtain the production remain a daunting ***,growing Tb^(3+)-doped CsPbl_(3) QDs in situ in borosilicate glass is proposed,which ensures the phase stability,and high-efficiency florescence output of the all-inorganic perovskite as a temperature sensor.A higher absolute and relative temperature sensitivity(0.0398 K^(-1) and 7.12%/K,respectively),along with the visible color change from orange-red to yellow-green with the increase of temperature is ***,the repeatable florescence intensity of Tb^(3+)-doped CsPbl_(3) QDs under high temperature enables their temperature sensing application.

关键词： CsPbI_(3)quantum dots Thermometry Thermal stability Visual change Rare earths