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| 1 | Characterization of personal exposure concentration of fine particles for adults and children exposed to high ambient concentrations in Beijing, China显示文摘In China, the health risk from overexposure to particles is becoming an important public health concern. To investigate daily exposure characteristics to PM 2.5 with high ambient concentration in urban area, a personal exposure study was conducted for school children, and office workers in Beijing, China. For all participants (N = 114), the mean personal 24-hr exposure concentration was 102.5, 14.7, 0.093, 0.528, 0.934, 0.174 and 0.703 μg/m 3 for PM 2.5 , black carbon, Mn, Al, Ca, Pb, and Fe. Children's exposure concentrations of PM 2.5 were 4-5 times higher than those in related studies. The ambient concentration of PM 2.5 (128.5 μg/m 3 ) was significantly higher than the personal exposure concentration (P < 0.05), and exceed the reference concentration (25 μg/m 3 ) of WHO air quality guideline. Good correlation relationships and significant differences were identified between ambient concentration and personal exposure concentration. The relationships indicate that the ambient concentration is the main factor influencing personal exposure concentration, but is not a good indicator of personal exposure concentration. Outdoor activities (commute mode, exposure to heating, workday or weekend travel) influenced personal exposure concentrations significantly, but the magnitude of the influence from indoor activities (exposure to cooking) was masked by the high ambient concentrations. | Xuan Du Qian Kong Weihua Ge Shaojun Zhang Lixin Fu | 2010 | Journal of Environmental Sciences2010，22，11： | 24 |
| 2 | Dynamic model for sucking process of pneumatic cutting-type safflower harvest device显示文摘This study proposed a method using negative pressure sucking the petals adhered around cones.The structural parameters of the sucking device affect the flow-field distribution in the negative-pressure air chamber.In order to improve the harvesting efficiency and quality of the pneumatic cutting-type safflower harvest device,a dynamic model was established and the safflower petals upwind area were measured.According to the test,the size parameters of the thornless Yumin safflower were as follows:the average necking diameter was 6.30 mm,the average capitulum diameter was 20.89 mm and the average petal length was 22.39 mm.The measured maximum frontal area of the safflower petal was 11-40 mm2.Secondly,the required negative pressure power that resulted in the rise of safflower petals was calculated.In general,when the suction of the negative pressure reaches 9.8 m/s,the safflower petals can be sucked successfully.The simulation of the flow field in the suction mouth indicated that the streamlined suction mouth was beneficial in reducing resistance and the test results of high-speed photography showed that the aforementioned condition could improve the efficiency of the upright safflower.And the test verified that the rate of the unshaped petals in the cylindrical air tunnel was low and the efficiency of carding and shaping under negative pressure was considerably better in wet petals than in dry ones.Results of the upright safflower petal experiment were consistent with the theoretical analysis and simulation conclusion,and indicated the precision of the dynamic model and suction flower mouth orifice-shaped simulation analysis. | Ge Yun Zhang Lixin Qian Ying Jiao Xiaopan Chen Yuanbo | 2016 | International Journal of Agricultural and Biological Engineering2016，9，5： | 6 |
| 3 | Streptomyces avermitilis industrial strain as cell factory for Ivermectin B1a production显示文摘Ivermectin,a kind of valuable derivatives of Avermectin,is distinct from Avermectin due to the saturated bond at C22eC23 position.Combinatorial biosynthesis of Ivermectins based on Avermectins biosynthetic gene cluster(ave)has been achieved recently,while the establishment of an Ivermectin homogeneous component producing strain is challenging because of the limited compatibility between the native and heterologous polyketide synthase(PKS)domains.In this study,the PKS module 2 Dehydratase(DH)-Enoylreductase(ER)-Ketoreductase(KR)domain set of Meilingmycin,which is another naturally occurring homologue of Avermectin,was employed to substitute the DH-KR domains of Avermectins PKS module 2 to generate an Ivermectin biosynthetic gene cluster(ive).Ivermectins B1a and A1a were heterologously biosynthesized in a classic actinomyces host Streptomyces lividans.The Avermectin B1a high-producing strain S.avermitilis 3-115 was genetically engineered to give an artificial host cell and Ivermectin B1a single component was effectively produced with a production of 1.25±0.14 g/L. | Qian Deng Liqiongzi Xiao Yang Liu Lixin Zhang Zixin Deng Changming Zhao | 2019 | Synthetic and Systems Biotechnology2019，4，1： | 3 |
| 4 | Experimental Study on Flow Boiling of Deionized Water in a Horizontal Long Small Channel显示文摘In this paper,an experimental investigation on the flow boiling heat transfer in a horizontal long mini-channel was carried out. The mini-channel was with 2 mm wide and 1 mm deep and 900 mm long. The material of the mini-channel was stainless. The working fluid was deionized water. The experiments were conducted with the conditions of inlet pressure in the range of 0.2~0.5 MPa, mass flux in the range of 196.57-548.96 kg/m2 s, and the outlet vapor quality in the range of 0.2 to 1. The heat flux was in the range of 292.86 kW/m2 to 788.48 kW/m2,respectively. The influences of mass flux and heat flux were studied. At a certain mass flow rate, the local heat transfer coefficient increased with the increase of the heat flux. If dry-out occurred in the mini-channel, the heat transfer coefficient decreased. At the same heat flux, the local heat transfer coefficient would depend on the mass flux. It would increase with the mass flux in a certain range,and then decrease if the mass flux was beyond this range. Experimental data were compared with the results of previous studies. Flow visualization and measurements were conducted to identify flow regime transitions. Results showed that there were eight different kinds of flow patterns occurring during the flow boiling. It was found that flow pattern had a significant effect on heat transfer. | HUANG Qian JIA Li DANG Chao YANG Lixin | 2018 | Journal of Thermal Science2018，27，2： | 3 |
| 5 | Research Progress on Agrobacterium tumefaciens-based Transgenic Technology in Brassica rapa显示文摘Brassica rapa L.is cultivated globally and consumed in many areas worldwide.Using the transgenic Agrobacterium-mediated transformation method,which is a reproducible and efficient technique,genes can be transferred into various B.rapa species.This review summarizes the processes involved in Agrobacterium-mediated transformation of B.rapa,including surface seed sterilization,co-cultivation with A.tumefaciens,induction of callus/shoot/root formation,and confirmation of transgenic plants.In addition,factors such as the Agrobacterium strain,plant genotype,explant age,transformation efficiency of the hybrid or inbred line,and the concentrations of N6-benzyl amino purine and naphthalene acetic acid,are discussed.And this review shows clearly how to do it,what to do,and what not to do in the transgenic Agrobacterium-mediated in Brassica rapa.The information presented here lays the foundation for a simple and efficient method that resolves existing problems and improves overall transgenic B.rapa production,thereby benefiting both basic and applied research. | LI Guoliang YUE Lixin LI Fei ZHANG Shifan ZHANG Hui QIAN Wei FANG Zhiyuan WU Jian WANG Xiaowu ZHANG Shujiang SUN Rifei | 2018 | Horticultural Plant Journal2018，4，3： | 3 |
| 6 | Detection of infectious dengue virus by selective real-time quantitative polymerase chain reaction显示文摘Dear Editor,The dengue virus(DENV)is a single-stranded positivesense RNA virus that belongs to the family Flaviviridae(Gubler,2002),and has four serotypes,DENV1–DENV4,which are transmitted via Aedes aegypti and Aedes albopictus(Rodriguez-Roche and Gould,2013).It has been reported that more than 50 million dengue infections occur each year(Guzman et al.,2010),and a serious outbreak occurred in the Southern Provinces | Xin Huang Xuan Zhou Xiaoyan He Pei Wang Shuai Yue Lixin Wu Yu Zhang Qian Xie Bao Zhang Wei Zhao | 2016 | Virologica Sinica2016，31，4： | 2 |
| 7 | Ultraviolet-B-induced oxidative stress and antioxidant defense system responses in ascorbate-deficient vtc1 mutants of Arabidopsis thaliana显示文摘 | Qian Gao Lixin Zhang | 2007 | Journal of Plant Physiology2007，，2： | 1 |
| 8 | A new shock absorber model for use in vehicle dynamics studies 显示文摘 | Richard Van Kasteel Wang Chengguo Qian Lixin | 2005 | Vehicle System Dynamics2005，43，9： | 1 |
| 9 | A new shock absorber model for use in vehicle dynamicsstudies显示文摘 | RICHARD V K WANG Chengguo QIAN Lixin | 2005 | Vehicle System Dynamics2005，43，9： | 1 |
| 10 | The feasibility of using soil seed bank for natural regeneration of degraded sandy grasslands显示文摘Desertification in degraded grasslands is manifested through the development of bare sandy patches,which eventually lead to habitat fragmentation.The ability of these bare sandy patches to regenerate naturally through in-situ soil seed banks is not well understood.To fill this knowledge gap,we randomly selected 24 bare sandy patches with areas ranging from 19 to 898 m^(2) in a desertified grassland of the Horqin sandy land,Northern China to determine whether soil seed bank can be used for natural regeneration of bare sandy patches.Species composition and density of soil seed bank as well as aboveground vegetation composition,abundance and coverage were investigated.We then determined their relationships with in-situ habitat characteristics.Our observations showed that the studied area had low soil seed bank density and species richness,as well as depauperate soil seed bank communities.Consequently,local soil seed bank was not able to provide sufficient seed source for natural regeneration.This was indicated by the relationships between aboveground vegetation,soil seed bank and the in-situ habitat characteristics.For bare patches with an area between 300 m^(2) and 900 m^(2),increase the soil seed bank density and species richness should be the main restoration measures.For bare patches with a small area of less than 50 m^(2),restoration of vegetation density should be the main measure.Our data highlighted that different extents of desertification,indicated by different bare patches,are requiring distinct restoration measures. | Yongcui Wang Lei Chu Zhimin Liu MuSa Ala Jixiang Lin Jianqiang Qian Quanlai Zhou Lixin Wang | 2022 | International Soil and Water Conservation Research2022，10，3： | 1 |
| 11 | The influence of a thick hard rock stratum on underground mining subsidence显示文摘 | Lixin Wu Mingao Qian Jinzhuang Wang | 1997 | International Journal of Rock Mechanics and Mining Sciences1997，，2： | 1 |
| 12 | Study on Fragment Focusing Mode of Air-Defense Missile Warhead 显示文摘 | Liu Tong Qian Lixin | 1998 | Propellants Explosives Pyrotechnics1998，1998，23： | 1 |
| 13 | Specific cross-dimerization of terminal alkynes via Pd/TMEDA catalysis显示文摘The cross-dimerization of terminal alkynes is the most straightforward and attractive approach to differently substituted 1,3-enynes,which are vital structural motifs in natural products,biologically active compounds,and organic functional materials,etc.However,due to the inherent issues of the stereo-,regio-,and chemoselectivity,the strategy is less explored and remains problematic in substrate scope,selectivity,and screening of catalytic system,etc.Herein,a specific cross-dimerization of terminal alkynes is developed under Pd/TMEDA catalysis,which produces a series of gem-1,3-enynes(58 examples)in totally moderate to high yields with outstanding functional group tolerance.A cyclopalladium compound might be the key imtermediate,which performs anti-addition-carbometallation,and leads to the exclusive cross-selectivity.The unprecedented features of the reaction,such as anti-addition-carbometallation,easy control of selectivity,wide range of the donor alkynes,and very simple catalytic conditions,allow it not only a facile and functionally diverse synthesis of 1,3-enynes,but also a substantial progress for the textbook reaction. | Lixin Liu Jianyu Dong Zuqi Fu Lebin Su Shaofeng Wu Qian Shang Shuang-Feng Yin Yongbo Zhou | 2022 | Science China Chemistry2022，65，12： | 1 |
| 14 | A new shock absorber model for use in vehicle dynamics studies显示文摘 | RICHARD V K WANG Chengguo QIAN Lixin | 2005 | Vehicle System Dynamics2005，43，9： | 1 |
| 15 | A New Shock Absorber Model for Use in Vehicle Dynamics Studies 显示文摘 | Richard V K WANG Chengguo QIAN Lixin | 2005 | Vehicle system dynamics2005，43，： | 1 |
| 16 | Evaluation of docetaxel- and oxaliplatin-based adjuvant chemotherapy in postgastrectomy gastric cancer patients reveals obvious survival benefits in docetaxel-treated mixed signet ring cell carcinoma patients显示文摘 | Li Chen Yan Shi Jing Yuan Qian Wu Yalin Han Rui Qin Baoqing Jia Bo Wei Lixin Wei Guanghai Dai Shunchang Jiao | 2014 | Medical Oncology2014，，9： | 1 |
| 17 | The First High-quality Reference Genome of Sika Deer Provides Insights into High-tannin Adaptation显示文摘Sika deer are known to prefer oak leaves,which are rich in tannins and toxic to most mammals;however,the genetic mechanisms underlying their unique ability to adapt to living in the jungle are still unclear.In identifying the mechanism responsible for the tolerance of a highly toxic diet,we have made a major advancement by explaining the genome of sika deer.We generated the first high-quality,chromosome-level genome assembly of sika deer and measured the correlation between tannin intake and RNA expression in 15 tissues through 180 experiments.Comparative genome analyses showed that the UGT and CYP gene families are functionally involved in the adaptation of sika deer to high-tannin food,especially the expansion of the UGT family 2 subfamily B of UGT genes.The first chromosome-level assembly and genetic characterization of the tolerance to a highly toxic diet suggest that the sika deer genome may serve as an essential resource for understanding evolutionary events and tannin adaptation.Our study provides a paradigm of comparative expressive genomics that can be applied to the study of unique biological features in non-model animals. | Xiumei Xing Cheng Ai Tianjiao Wang Yang Li Huitao Liu Pengfei Hu Guiwu Wang Huamiao Liu Hongliang Wang Ranran Zhang Junjun Zheng Xiaobo Wang Lei Wang Yuxiao Chang Qian Qian Jinghua Yu Lixin Tang Shigang Wu Xiujuan Shao Alun Li Peng Cui Wei Zhan Sheng Zhao Zhichao Wu Xiqun Shao Yimeng Dong Min Rong Yihong Tan Xuezhe Cui Shuzhuo Chang Xingchao Song Tongao Yang Limin Sun Yan Ju Pei Zhao Huanhuan Fan Ying Liu Xinhui Wang Wanyun Yang Min Yang Tao Wei Shanshan Song Jiaping Xu Zhigang Yue Qiqi Liang Chunyi Li Jue Ruan Fuhe Yang | 2023 | Genomics, Proteomics & Bioinformatics2023，21，1： | 1 |
| 18 | A new shock absorber model for use in vehicle dynamics studies显示文摘 | Richard V K Wang Chengguo Qian Lixin | 2005 | Vehicle System Dynamics2005，43，： | 1 |
| 19 | Dynamics and adaptive synchronization of the energy resource system显示文摘 | Mei Sun Lixin Tian Ying Fu Wei Qian | 2007 | Chaos Solitions&Fractals2007，31，4： | 1 |
| 20 | An ATBM warhead显示文摘 | Liu Tong Yang Yunbin | 2000 | Propellants Explosives Pyrotechnics2000，25，3： | 1 |
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