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Continuity and Discontinuity： Narratives of the Yellow Emperor in Early Twentieth-Century History Textbooks

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Frontiers of History in China 2013年第2期8卷 176-201页

作者： jiang sun Institute of Advanced Studies in Humanities and Science Nanjing University Nanjing 210093China

In the study of the origin of Chinese civilization, there has been considerable debate about the identity of the Yellow Emperor （Huangdi）. There have been two main approaches： One proposes that the memory of the Yellow Emperor was altered under the influence of nationalism in the twentieth century. The other argues that the memory has been passed down in a continuous, unaltered stream since ancient times. By examining the narratives about and images of Huangdi in history textbooks published during the early twentieth century, this article shifts the focus from Huangdi as a symbolic figure in the political world to one in which we examine his reception in the everyday world. Thus we will explore different Huangdis, taking up aspects of memory, continuity, and discontinuity.

关键词： Yellow Emperor (Huangdi) history textbooks narratives nationalism

Invasive bark beetle-associated microbes degrade a host defensive monoterpene

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Insect Science 2016年第2期23卷 183-190页

作者： Le-Tian Xu Min Lu jiang-Hua sun State Key Laboratory of Integrated Management of Pest Insects and Rodents Institute of Zoology Chinese Academy of Sciences University of Chinese Academy of Sciences Beijing China

Conifers respond to herbivore attack with defensive chemicals, which are toxic to both insects and their associated microorganisms. Microorganisms associated with insects have been widely reported to metabolize toxic chemicals, which may help both microorganisms and host insects overcome host conifer defense. Dendroctonus valens LeConte, an introduced exotic pest from North America to China, has killed millions of healthy pines. Alpha-pinene is the most abundant defensive monoterpene in Chinese Pinus tabuliformis. Although microorganisms associated with D. valens have already been investigated, little is known about their bioactivities when encountering host defensive monoterpenes. In this study, we evaluated the influences of different concentrations ofα- pinene to D. valens and the three most frequently isolated yeasts and bacteria ofD. valens, and further assayed microorganisms＇ capabilities to degrade α-pinene. Results showed that the gallery lengths and body weight changes of bark beetles were significantly affected by 6 mg/mL and 12 mg/mL of α-pinene applied in media compared to controls. The tolerance of experimental microorganisms to α-pinene varied depending on the microbial species. Two out of three yeast strains and all three bacterial strains degraded 20%-50% of α-pinene compared to controls in 24 h in vitro. The microorganisms capable of α-pinene degradation in vitro and their tolerance to high levels ofα-pinene suggested that D. valens- associated microorganisms may help both microorganisms and the bark beetle overcome host α-pinene defense.

关键词： α-pinene associated microorganisms Dendroctonus valens

Effect of GMA Polymer Compatibilizers on Highly Filled Composites of Low Density Polyethylene/Magnesium Hydroxide

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Chinese Journal of Polymer Science 2014年第3期32卷 315-320页

作者： Ke-rui Guo Su-yun Xiang jiang-bo sun 孟长功 Department of Chemistry Dalian University of Technology

Functional polymers such as polyethylene grafted glycidyl methacrylate （PE-g-GMA） and ethylene-methyl acrylate-glycidyl methacrylate terpolymer （E/MA/GMA） were used as compatibilizers in the preparation of highly filled composites of polyethylene/magnesium hydroxide（PE/MH）. Comparative studies were performed on the effect of magnesium hydroxide and stearic acid on the interface within polymer and magnesium hydroxide composites. The effect of polymeric compatibilizers on the properties of the composites was studied using tensile and impact tests, torque rheological analysis, differential scanning calorimetry and environmental scanning electron microscopy （ESEM）. The microstructure of highly filled PE/MH composites changed after the addition of functional polymers. The mechanical properties of the composite material increased after compatibilization. The compatibilization processes of PE-g-GMA and E/MA/GMA were different. The grafted polymer was more compatible with polyethylene, which led to a polar polymer phase. In contrast, the tercopolymer tended to adhere to the surface of MH particles.

关键词： GMA Grafted polymer co-polymer Polyethylene Magnesium hydroxide.

Autophagy plays a protective role in advanced glycation end products-induced apoptosis of chondrocytes via regulation of tumor necrosis factor-α,nuclear factor-κ B and reactive oxygen species

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Asian Pacific Journal of Tropical Medicine 2018年第1期11卷 73-77页

作者： Zhi-jiang sun Ya-Yi Xia Orthopaedics Key Laboratory of Gansu Province The Second Hospital of Lanzhou University

Objective: To study the adverse effects of advanced glycation end products(AGEs) on chondrocytes and the role of autophagy in this process. Methods: Chondrocytes were harvested from the human articular cartilage tissues in surgery. AGEs were administered during chondrocytes culture. The rapamycin was used to induce autophagy. The cell viability was determined by 3-[4,5-dimethylthiazol2-yl]-2,5-diphenyl tetrazolium bromide(MTT) *** expression of tumor necrosis factor-α(TNF-α) and nuclear factor-κ B(NF-κ B) was detected by quantitative real-time polymerase chain reaction. The reactive oxygen species(ROS) production and apoptosis of the chondrocytes were determined by fluorescent probe and flow cytometer, respectively. Results: The chondrocytes viability was significantly reduced after 12 h incubation with AGEs(P<0.01)). In contrast, rapamycin pretreatment increased the chondrocytes viability through autophagy. AGEs increased TNF-α and NF-κ B mRNA expression of chondrocytes and autophagy receded or proceeded the change. AGEs increased intracellular ROS accumulation and autophagy reversed the change. AGEs accelerated chondrocytes apoptosis and autophagy suspended apoptosis. Conclusions: Accumulation of AGEs may have an adverse role for chondrocytes by increasing TNF-α and NF-κB expression, ROS accumulation and apoptosis; meanwhile, autophagy ameliorates the AGEsinduced adverse effects.

关键词： Advanced glycation end products Autophagy Tumor necrosis factor-α Nuclear factor-κ B Reactive oxygen species Apoptosis Chondrocytes

WO_(3)/Salan/30%H_(2)O_(2):a Heterogeneous Catalytic System for the Asymmetric Oxidation of Sulfides

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Chinese Chemical Letters 2006年第9期17卷 1173-1176页

作者： Yue ZHANG jiang Tao sun Cheng Jian ZHU Institute of Chemical Engineering Jiangsu Polytech University Changzhou 213016 Department of Chemistry Nanjing University Nanjing 210093 State Key Laboratory of Organometallic chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032

The asymmetric oxidation of sulfides catalyzed by WO3 and 30% H2O2 in the presence of salan as chiral ligands under heterogeneous conditions is described. The reaction system is very easily to be operated. Mild to hig... 详细信息

关键词： Asymmetric sulfoxidation heterogeneous enantioselectivity sulfoxides.

Fighting and aggressive sound determines larger male to win male-male competition in a bark beetle

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Insect Science 2021年第1期28卷 203-214页

作者： Zhu-Dong Liu Jacob D.Wickham jiang-Hua sun State Key Laboratory of Integrated Management of Pest Insects and Rodents Institute of ZoologyChinese Academy of SciencesChaoyang DistrictBeijingChina CAS Center for Excellence in Biotic Interactions Chinese Academy of SciencesChaoyang DistrictBeijingChina

Intrasexual selection occurs in male-male competition over access to females and usually results in the larger male *** much research has documented that size matters,little is known about how the larger male *** vale ns is an aggregating monogamous bark beetle in which males have large variation in body size and display intense competition over *** observation showed two males fight each other within the gallery by pushing/shoving and stridulated more when two males encountered each *** using two different-sized males synchronously competing showed that larger males won 95%of *** displacement experiments using muted and intact males of different or equal size were used to simulate male-male *** males displaced the smaller resident male in 90%of contests,while smaller males prevailed over larger residents in 6.7%of *** both males silenced,larger males displaced smaller males in 80%of con tests,while smaller males prevailed in 8%of con *** experiments using equal-sized males showed aggressive soundemitting males displaced muted males in 67%of contests,yet intact males displaced other intact males in only 37.5%of con *** analysis showed sound pressure level is an honest signal of body size and males chose soft sounds over loud aggressive sounds in ***,*** males have evolved dual behaviors,fighting and aggressive sounds associated with body size,to assess rivals to compete for a partner,gaining insights in male-male competition for this species and for other animals.

关键词： aggressive soun ds animal con test theory bark bee tie body size fighting male-male competition

Biology and damage traits of emerald ash borer planipennis Fairmaire）in China

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Insect Science 2007年第5期14卷 367-373页

作者： XIA WEI YUN WU RICHARD REARDON TIE-HUAN sun MIN LU jiang-HUA sun Forest Protection Institute of Heilongjiang Province Harbin China USDA Forest Service Forest Health Technology Enterprise Team Morgantown West Virginia USA Forest Pest Prevention and Quarantine Station of Tianjin Tianjin China State Key Laboratory of Integrated Management of Pest Insects and Rodents Institute of Zoology Beijing China

Emerald ash borer （Agrilus planipennis Fairmaire）（Coleoptera： Buprestidae） is a major stem borer of ash （Fraxinus spp.）. It is univoltine in Tianjin, while it is semivoltine in Heilongjiang Province, and both univoltine and semivoltine in Changchun, Jilin Province, where the majority is univoltine. The longevity of emerald ash borer adults is 17.2 ± 4.6 days （n = 45）, eggs 9.0 5：1.1 days （n = 103）, univoltine larvae 308 days, semivoltine larvae 673 days, and pupae 61.2 ± 1.6 days （n = 45）. It takes about 100 days from the time larvae bore into the phloem to when they complete the pupal cell. In a 10-year-old velvet ash （Fraxinus velutina Tort.） plantation in Tianjin, emerald ash borer preferred to oviposit on the regions of boles from 50-150 cm above ground, accounting for 76.7% of the total girdling. Girdling on the south side of the tree boles accounted for 43.40% of the total girdling. The emerald ash borer population density is higher at the edge of the plantation compared with the center.

关键词： biology damage traits emerald ash borer life history

Evidence of Evolution in the Dense Cores in Massive Star Forming Regions

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Chinese Journal of Astronomy and Astrophysics 2005年第4期5卷 363-370页

作者： Jian-Jun Zhou Jarken Esimbek Ji-Xian sun Bing-Gang Ju Jing-jiang sun National Astronomical Observatories/Urumqi observatory Chinese Academy of SciencesUrumqi 830011 Graduate School of the Chinese Academy of Science Beijing 100080 Qinghai Station of Purple mountain Observatory Chinese Academy of Science DelinghaQinghai 817000

The excitation of H2O masers usually needs very high density gas,hence it can serve as a marker of dense gas in HⅡ region. We selected a sample of H2O maser sources from Plume et al. （four with, and four without detected CS（J = 7 - 6） emission）, and observed them in ^13CO（J=1-0） and C^18O （J=1-0）. C^18O （J=1-0） emission was detected only in three of the sources with detected CS（J=7-6） emission. An analysis combined with some data in the literature suggests that these dense cores may be located at different evolutionary stages. Multi-line observation study may provide us clues on the evolution of massive star forming regions and the massive stars themselves.

关键词： ISM: molecules - masers - radio lines: ISM-stars: formation

Safe rendezvous scenario design for geostationary satellites with collocation constraints

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Astrodynamics 2017年第1期1卷 71-83页

作者： Ya-Zhong Luo Zhen-jiang sun College of Aerospace Science and Engineering National University of Defense TechnologyChangsha 410073China

Rendezvous on the geostationary orbit(GEO)is much more complex than that on the low earth orbit and has a higher critical requirement for safety *** paper presents a safe scenario design method for GEO rendezvous proximity missions where the safety constraint of a collocated satellite is considered.A recently proposed quantitative index considering trajectory uncertainty is introduced to analyze the safety performance of the scenario parameters including the V-bar keeping positions and the fly-by trajectory ***,an exhaustive analysis is performed to find the dangerous regions of the V-bar keeping positions and the appropriate semi-major axis of the fly-by ellipse,considering the safety requirements of both the target and the collocated satellite.A geometry method is then developed for designing a feasible and suboptimal safe rendezvous *** method is tested by designing four rendezvous scenarios with±V-bar approach directions respectively in the situations with and without one collocated *** performance and velocity increments of the scenarios are compared and a conclusion is reached that the collocated satellite has a significant influence on the scenario design.

关键词： geostationary orbit(GEO) rendezvous and docking(RVD) safety performance satellite collocation