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| 1 | A significant carbon sink in temperate forests in Beijing: based on 20-year field measurements in three stands显示文摘Numerous efforts have been made to characterize forest carbon(C) cycles and stocks in various ecosystems. However, long-term observation on each component of the forest C cycle is still lacking. We measured C stocks and fluxes in three permanent temperate forest plots(birch, oak and pine forest) during 2011–2014, and calculated the changes of the components of the C cycle related to the measurements during 1992–1994 at Mt. Dongling, Beijing, China. Forest net primary production in birch, oak, and pine plots was 5.32, 4.53, and 6.73 Mg C ha?1 a?1, respectively. Corresponding net ecosystem production was 0.12, 0.43, and 3.53 Mg C ha?1 a?1. The C stocks and fluxes in 2011–2014 were significantly larger than those in 1992–1994 in which the biomass C densities in birch, oak, and pine plots increased from 50.0, 37.7, and 54.0 Mg C ha–1 in 1994 to 101.5, 77.3, and 110.9 Mg C ha?1 in 2014; soil organic C densities increased from 207.0, 239.1, and 231.7 Mg C ha?1 to 214.8, 241.7, and 238.4 Mg C ha?1; and soil heterotrophic respiration increased from 2.78, 3.49, and 1.81 Mg C ha?1 a?1 to 5.20, 4.10, and 3.20 Mg C ha?1 a?1. These results suggest that the mountainous temperate forest ecosystems in Beijing have served as a carbon sink in the last two decades. These observations of C stocks and fluxes provided field-based data for a long-term study of C cycling in temperate forest ecosystems. | ZHU JianXiao HU XueYang YAO Hui LIU GuoHua JI ChenJun FANG JingYun | 2015 | Science China(Life Sciences)2015，58，11： | 6 |
| 2 | Pharmacological Activation of RXR-a Promotes Hematoma Absorption via a PPAR-y-dependent Pathway After Intracerebral Hemorrhage显示文摘Endogenously eliminating the hematoma is a favorable strategy in addressing intracerebral hemorrhage(ICH).This study sought to determine the role of retinoid X receptor-ot(RXR-a)in the context of hematoma absorption after ICH.Our results showed that pharmacologically activating RXR-a with bexarotene significantly accelerated hematoma clearance and alleviated neurological dysfunction after ICH.RXR-ot was expressed in microglia/macro-phages,neurons,and astrocytes.Mechanistically,bexarotene promoted the nuclear translocation of RXR-a and PPAR-y,as well as reducing neuroinflammation by modulating microglia/macrophage reprograming from the Ml into the M2 phenotype.Furthermore,all the beneficial effects of RXR-a in ICH were reversed by the PPAR-y inhibitor GW9662.In conclusion,the pharmacological activation of RXR-a confers robust neuroprotection against ICH by accelerating hematoma clearance and repolarizing microglia/macrophages towards the M2 phenotype through PPAR-y-related mechanisms.Our data support the notion that RXR-ot might be a promising therapeutic target for ICH. | Chaoran Xu Huaijun Chen Shengjun Zhou Chenjun Sun Xiaolong Xia Yucong Peng Jianfeng Zhuang Xiongjie Fu Hanhai Zeng Hang Zhou Yang Cao Qian Yu Yin Li Libin Hu Guoyang Zhou Feng Yan Gao Chen Jianru Li | 2021 | Neuroscience Bulletin2021，37，10： | 4 |
| 3 | Chemical Modifications on Linen forUnsaturated Polyester Composites显示文摘Linen was chemically modified by oleoyl chloride(OC) and stearoyl chloride(SC) to graft fatty moietiesonto fiber via ester connections. Pyridine was used as solvent. The reaction was simplified by reacting the compoundsin air at 60℃ for 6 h. Fourier transform infrared spectroscopy(FTIR) and thermal gravimetric analysis were con-ducted to characterize the treated fiber. The FTIR result confirms that the fatty portions have been successfullygrafted onto the fiber after the chemical modification. The thermal stability of the SC-modified linen(SCL) was simi-lar to that of the flax modified by oleoyl chloride(OCL). SCL and OCL demonstrated a temperature of 5% mass loss,which was above 200 ℃ and could meet the requirements of the processing conditions for most composites. The-reafter, the SCL-reinforced unsaturated polyester(UPE) composites were prepared and characterized. The compositepresented a much better impact strength of 61.1 J/m and tensile modulus of 1.69 GPa than those of UPE with appli-cable thermal stability. SCL has been shown to be a promising choice as reinforcing material for composites. | HU Qiuxue YAN Xinxin DONG Chenjun HU Wei | 2016 | Chemical Research in Chinese Universities2016，32，6： | 1 |
| 4 | Terahertz Spectroscopy for Accurate Identification of Panax quinquefolium Basing on Nonconjugated 24(R)-Pseudoginsenoside F_(11)显示文摘Panax quinquefolium is a perennial herbaceous plant that contains many beneficial ginsenosides with diverse pharmacological effects.24(R)-pseudoginsenoside F_(11)is specific to P.quinquefolium,a useful biomarker for distinguishing this species from other related plants.However,because of its nonconjugated property and the complexity of existing detection methods,this biomarker cannot be used as the identification standard.We herein present a stable 24(R)-pseudoginsenoside F_(11)fingerprint spectrum in the terahertz band,thereby proving that F_(11)can be detected and quantitatively analyzed via terahertz spectroscopy.We also analyzed the sample by high-performance liquid chromatography-triple quadrupole mass spectrometry.The difference between the normalized data for the two analytical methods was less than 5%.Furthermore,P.quinquefolium from different areas and other substances can be clearly distinguished based on these terahertz spectra with a standard principal component analysis.Our method is a fast,simple,and cost-effective approach for identifying and quantitatively analyzing P.quinquefolium. | Tianyi Kou Ji Ye Jing Wang Yan Peng Zefang Wang Chenjun Shi Xu Wu Xitian Hu Haihong Chen Ling Zhang Xiaohong Chen Yiming Zhu Huiliang Li Songlin Zhuang | 2021 | Plant Phenomics2021，3，1： | 1 |
| 5 | Electrochemi- cal discharge dressing of metal bond micro-grinding tools 显示文摘 | Wei Chenjun Hu Dejin Xu Kaizhou | 2011 | International Journal of Machine Tool and Manufac- ture2011，51，2： | 1 |
| 6 | Left Ventricular Tachycardia Originating Near the Left Main Coronary Artery显示文摘 | Dayi Hu Chenjun Guo Jianjun Yang Lihua Shang Yuyun Xu Kenneth A. Ellenbogen Richard K. Shepard Mark A. Wood | 2000 | Journal of Interventional Cardiac Electrophysiology2000，，2： | 1 |
| 7 | Eleetrieal dis- charge machining of eeramie matrix eomposites with eeramie fiber reinforcements 显示文摘 | WEI Chenjun ZHAO Li HU Dejin | 2013 | Int J Adv Manuf Teehnol2013，，64： | 1 |
| 8 | Carboxyl-functionalized Nanocellulose Reinforced Nanocomposite Proton Exchange Membrane显示文摘Nanocellulose(NCC) was prepared through the acid hydrolysis of microcellulose(MCC) and was reacted with maleic anliydride to obtain carboxyl-functionized nanocellulose(MA-NCCs). The presence of .OH and .SO3H on the surface of rod-like MA-NCC was confirmed by Fourier transfonn infrared spectrometry(FTIR). Sulfonated poly(aryl ether ether ketone ketone)(Ph-SPEEKK) was synthesized with bis(4-fluorophenyl-methanone) and 2-phenylhydroquinone as monomer. MA-NCC/Ph-SPEEKK nanocomposite membranes with different MA-NCCs content were prepared, and their properties were characterized. Compared with Ph-SPEEKK, MA-NCC/Ph-SPEEKK nanocomposite membrane showed better mechanical and thermal properties and higher proton conductivity. The proton conductivity of the composite membrane with 4%(mass fraction) MA-NCCs under 80℃ was 0.095 S/cm. And its tensile strength reached 30.3 MPa, which was 21.2% higher than that of Ph-SPEEKK pure polymer membrane. | YANG Xue WEI Yingcong CHU Xuefeng ZHAO Qi YAN Wenling DONG Chenjun LIU Baijun SUN Zhaoyan HU Wei ZHANG Niaona | 2019 | Chemical Research in Chinese Universities2019，35，4： | 0 |
| 9 | Decoding the Cellular Trafficking of Prion-like Proteins in Neurodegenerative Diseases显示文摘The accumulation and spread of prion-like proteins is a key feature of neurodegenerative diseases(NDs)such as Alzheimer’s disease,Parkinson's disease,or Amyotrophic Lateral Sclerosis.In a process known as‘seeding’,prion-like proteins such as amyloid beta,microtubule-associated protein tau,α-synuclein,silence superoxide dismutase 1,or transactive response DNA-binding protein 43 kDa,propagate their misfolded conformations by transforming their respective soluble monomers into fibrils.Cellular and molecular evidence of prion-like propagation in NDs,the clinical relevance of their‘seeding’capacities,and their levels of contribution towards disease progression have been intensively studied over recent years.This review unpacks the cyclic prion-like propagation in cells including factors of aggregate internalization,endo-lysosomal leaking,aggregate degradation,and secretion.Debates on the importance of the role of prion-like protein aggregates in NDs,whether causal or consequent,are also discussed.Applications lead to a greater understanding of ND pathogenesis and increased potential for therapeutic strategies. | Chenjun Hu Yiqun Yan Yanhong Jin Jun Yang Yongmei Xi Zhen Zhong | 2024 | Neuroscience Bulletin2024，40，2： | 0 |
| 10 | Amino acids industry knowledge service platform显示文摘Purpose: This paper introduces an amino acids industry knowledge service platform, which integrates industry data, science literature, and technology knowledge from patents.Design/methodology/approach: From the perspective of knowledge organization, the amino acids industry knowledge service platform comprises a basic data layer, a knowledge representation layer, and a knowledge service layer. The platform integrates heterogeneous information sources by means of a multi-dimensional integration index. It enables users to find technology knowledge from patents by employing the semantic Theory of Inventive Problem Solving(TRIZ).Findings: This paper constructs an integrated amino acids industry database, which offers a general service oriented to the public, and a technical innovation knowledge base, which offers a value-added service oriented to enterprises.Research limitations: The technical innovation knowledge base only includes parts of amino acids technology knowledge, making it suitable to meet certain specific needs. Practical implications: Semantic annotation of technical innovation knowledge from patents requires manual work by domain experts.Originality/value: The amino acids industry knowledge service platform offers not only an integrated search service for amino acids industry information, but also a deep tech mining service for technical innovation knowledge of amino acids. It will offer a more personalized knowledge service in the future. | Yi WEN Hongguang FU Shu FANG Qinggang LI Zhengyin HU Chunjiang LIU Ning YANG Xian ZHANG Yuan XU Chenjun Ding Yuexian ZHU | 2015 | Chinese Journal of Library and Information Science2015，，4： | 0 |
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