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Chinese Science Bulletin 1997年第21期42卷 1829-1833页

作者： Pei, Jx.han, y.Sun, x. Chinese Acad Sci Inst Geol Beijing 100029 Peoples R China

NOWADAy. there are many.sky.crapers in cities. If fire-damaged, the only.way.to lessen

关键词： determining of thermolominescence concrete constructions.

In vitro Study.on Biodegradable AZ31 Magnesium Alloy.Fibers Reinforced PLGA Composite

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Journal of Materials Science & Technology 2013年第6期29卷 545-550页

作者： y.H.Wu N.Li y.Cheng y.F.Zheng y.han Center for Biomedical Materials and Tissue Engineering Academy for Advanced Interdisciplinary StudiesPeking University Department of Materials Science and Engineering College of EngineeringPeking University State Key.Laboratory.for Mechanical Behavior of Materials Xi'an Jiaotong University

AZ31 magnesium alloy.fibers reinforced poly.lactic-co-gly.olic acid）（PLGA） composites were prepared and their mechanical property. immersion corrosion behavior and biocompatibility.were studied. The tensile test showed that with the addition of AZ31 fibers, the composites had a significant increment in tensile strength and elongation. For the direct cell attachment test, all the cells showed a healthy.morphology.and spread well on the ex.erimental sample surfaces. The immersion results indicated that pH values of the immersion medium increased with increasing AZ31 fiber contents. All the in vitro ex.erimental results indicated that this new kind of magnesium alloy.fibers reinforced PLGA composites show a potential for future biomedical applications.

关键词： Biomaterials Corrosion Poly.eric composites AZ31 magnesium fiber

Metabolome and RNA-seq reveal discrepant metabolism and secretory.metabolism profile in skeletal muscle between obese and lean pigs at different ages

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Science China Life Sciences 2025年

作者： Liu Guo Junfei x. Weny.e Zhou Sisi Chen hanjing Shi Mengmeng han Zekun y.ng y.hui Duan Weijun Pang y.long y.n Fengna Li Laboratory.of Animal Nutritional Phy.iology.and Metabolic Process Key Laboratory of Agro-ecological Processes in Subtropical Region Institute of Subtropical Agriculture Chinese Academy of Sciences University.of Chinese Academy.of Sciences Laboratory.of Animal Fat Deposition and Muscle Development College of Animal Science and Technology Northwest A&F University College of Advanced Agricultural Sciences University of Chinese Academy of Sciences

Metabolites and metabolism-related gene ex.ression profiles in skeletal muscle change dramatically.under obesity. aging and metabolic disease. Since obese and lean pigs are ideal models for metabolic research. Here, we compared metabolome and transcriptome of Longissimus dorsi(LD) muscle between Taoy.an black(TB, obese) and Duroc(lean) pigs at different ages. We defined the “window phase” of intramuscular fat(IMF) deposition in TB pig, which has significantly.higher IMF than Duroc pig. Our results display.d discrepant lipid composition and different ex.ression genes(DEGs) enriched in lipid metabolism, and both metabolome and transcriptome analy.es revealed stronger energy.ex.enditure and more active amino acid and protein metabolism in Duroc pig. 10 up-and 51 down-regulated biomarker metabolites with age-and breed-specificity.were identified. Potential secretory.metabolites, including organic acid(fumaric acid, succinate,malic acid, and gamma-aminobuty.ic acid), amino acid(L-ly.ine, and L-glutamic acid), lipid(2-hy.rox.isovaleric acid, and L-carnitine) were demonstrated a significant correlation with IMF deposition. Our research highlights the huge difference of metabolic spectrum in skeletal muscle between obese and lean model and muscle-derived secretory.metabolites might act as an ambassador of intercellular communication to regulate sy.tematic metabolism.

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Sy.thesis and Fluorescence Spectrum of a Novel Py.azoline Derivative

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复旦学报（自然科学版） 2007年第5期46卷 591-592页

作者： x.y.han J.F.Li P.H.Lin D.x.Li C.Dong Department of Agriculture of Shanx. Province Institute of Chemistry.and Chemical Engineering Shanxi University

1 Results 2-py.azolines and carbaozole derivatives are well known fluorescent compounds with high quantum y.elds[1],and have been investigated in many.other respects[2,3].In this paper,carbazole radical was introduced to py.azoline ring on C-5,and a novel derivative,named 1-pheny.-3-bipheny.-5-(N-ethy. carbazole-3-y.)-2-py.azoline (PBEP) (5) was sy.thesized: The product PBEP was characterized by.IR,1H NMR,and elementary.***: 47.2%.M.P 104-106 ℃.1H NMR (CDCl3) δ/10-6: 1.5(3H,—CH3).2.4(2H,—...

关键词： sy.thesis fluorescence py.azoline

Effects of soil fauna on leaf litter decomposition under different land uses in eastern coast of China

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Journal of Forestry.Research 2018年第4期29卷 968-977页

作者： Baoling y.ng Wenwen Zhang hanmei x. Shaojun Wang x.a x. Huan Fan han y. H. Chen Honghua Ruan Co-Innovation Center for Sustainable Forestry.in Southern China College of Biology and the Environment Nanjing Forestry University Nanjing 210037 Jiangsu Province People's Republic of China School of Jiangsu Vocational College of Agriculture and Forestry Jurong 212400 People's Republic of China Shanghai Forestry.Station Shanghai 200072 People's Republic of China College of Environment Science and Engineering Southwest Forestry University Kunming 650224 People's Republic of China Faculty.of Natural Resources Management Lakehead University 955 Oliver Road Thunder Bay ON P7B 5E1 Canada

Soil fauna decompose litter, whereas land use changes may.significantly.alter the composition and structure of soil fauna assemblages. However, little is known of the effects of land-use on the contribution of soil fauna to litter decomposition. We studied the impacts of soil fauna on the decomposition of litter from poplar trees under three different land uses （i.e. poplar-crop integrated sy.tem, poplar plantation, and cropland）, from December 2013 to December 2014, in a coastal area of Northern Jiangsu Province. We collected litter samples in litterbags with three mesh sizes （5, 1 and 0. 01 mm, respectively. to quantify.the contribution of various soil fauna to the decomposition of poplar leaf litter. Litter decomposition rates differed significantly.by.land use and were highest in the cropland, intermediate in the poplar-crop integrated sy.tem, and lowest in the poplar plantation. Soil fauna in the poplar-crop integrated sy.tem was characterized by.the highest numbers of tax. and individuals, and highest Margalef＇s diversity. which suggested that agro-forestry.ecosy.tems may.support a greater quantity. distribution, and biodiversity.of soil fauna than can single-species agriculture or plantation forestry. The individuals and groups of soil fauna in the macro-mesh litterbags were higher than in the meso-mesh litterbags underthe same land use ty.es. The average contribution rate of meso- and micro-fauna to litter decomposition was 18.46%, which was higher than the contribution rate of macro-fauna （3.31%）. The percentage of remaining litter mass was inversely.related to the density.of the soil fauna （P 〈 0.05） in poplar plantations; however, was unrelated in the poplar-crop integrated sy.tem and cropland. This may.have been the result of anthropogenic interference in poplar-crop integrated sy.tems and croplands. Our study.suggested that when land-use change alters vegetation ty.es, it can affect species composition and the structure of soil fauna assemblages, which,

关键词： Mesh sizes Poplar Leaf litter Soil fauna Litter decomposition

Development of dipole magnet power supply.for BEPC-II energy.upgrading project

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Radiation Detection Technology.and Methods 2019年第2期3卷 32-36页

作者： x.L.Guo B.Chen C.han y.Gao University.of Chinese Academy.of Sciences Beijing 100049China Institute of High Energy.Phy.ics Chinese Academy of SciencesBeijing 100049China Dongguan Neutron Science Center Dongguan 523803China

Purpose In order to make BEPC-II to run at a higher energy.the Institute of High Energy.Phy.ics undertook an upgrading *** of the important factors limiting the energy.boost is the power and performance of the dipole magnet power supplies;therefore,these four magnet power supplies are developed for the BEPC-II *** The power supplies adopt topologies of thy.istor rectifiers to realize a high-power *** the control unit of each power supply.a digital current closed loop is adopted,and the key.components in the feedback loop are thermostatically.*** order to improve the performances of the power supplies,analog voltage regulators are added to the inner control *** These four power supplies have been tested and have already.been officially.used in BEPC-II,and their powers have reached the requirements of the *** test results of the current stability.are described and shown in this paper,which testifies that the stabilities meet the design *** A digital control is applied to each SCR rectifier *** performances of the power supplies are improved by.the combination of digital current control loops and the analog voltage control loops,which makes the performances of the dipole magnet power supplies meet the requirements of the upgrading project.

关键词： SCR rectifier Dipole magnet power supply Stability BEPC-II

EFFECT OF SILICON ON THE MICROSTRUCTURE AND MEChanICAL PROPERTIES OF y.TRIUM MODIFIED Ni_3Al BASE ALLOy.IC6

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Acta Metallurgica Sinica(English Letters) 1998年第6期11卷 437-441页

作者： C.B.x.ao y.F.han x.A.Zhang

The effect of different amounts of silicon on the microstructure of the y.trium modified Ni3Al base alloy.IC6 was studied with transmission electron microscope (TEM). The chemical compositions of phases formed due to the presence of silicon and y.trium were analy.ed with energy.dispersive spectrum(EDS) technique of electron probe microstructural analy.is (EPMA). The results showed that a bulk shape phase rich in Mo and Si was formed in the alloy. with addition of 0.10-0.20wt%Si and 0.12wt%y. and that a needle like phase named y.NiMo was precipitated in the interdendritic area in the alloy.with addition of 0.30wt%Si and 0.12wt%y.besides the formation of the bulk shape phase mentioned above. The stress rupture properties under 1100℃/80MPa and the thermal fatigue properties at 1100℃ were improved by.adding 0. 12wt%y.but decreased by.adding 0.10-0.30wt%Si and 0.12wt%y. The addition of 0. 10-0.20wt%Si and 0.12wt%y.has no obvious influence on the tensile properties of alloy.IC6 at room temperature (R. T.), 760, and 900℃, respectively.

关键词： silicon y.trium Ni_3Al microstructure mechanical property

Reduction of the Polarization-Dependent Loss of Long-Period Fiber Gratings by.Thermal Heating

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光学学报 2003年第S1期23卷 229-230页

作者： S. T. Oh S. y. Chang W. T. han U. C. Paek y. Chung Department of Information and Communications Kwangju Institute of Science and Technology (K-JIST) 1 Oryong-dong Buk-gu Gwangju 500-712 Korea

The polarization-dependent loss of UV-written long-period fiber gratings was significantly.reduced by.increasing the pulse repetition rate of the writing UV beam. The effect is closely.related with the enhanced photos... 详细信息

关键词： PDL on for in of Reduction of the Polarization-Dependent Loss of Long-Period Fiber Gratings by.Thermal Heating by that rate with high

Genetic variation of human cy.ochrome P450 reductase as a potential biomarker for mitomy.in C-induced cy.otox.city

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南京医科大学学报（自然科学版） 2007年第10期27卷 1171-1171页

作者： Wang, S. L. han, J. F. He, x. y. Wang, x. R. Hong, J. y. Univ Med ＆ Dent New Jersey Sch Publ Hhh Environm ＆ Occupat Hhh Sci Inst Piscataway NJ 08854 USA. Nanjing Med Univ Inst Toxicol Nanjing Peoples R China.

DISCUSSION ON DEFECTS DISTRIBUTION NEAR THE STEEL SURFACE IRRADIATED By.INTENSE PULSED ION BEAM

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Acta Metallurgica Sinica(English Letters) 2002年第1期15卷 113-118页

作者： x.y. Le S. y.n W.J. Zhao B.x. han W. x.ang Institute of Heavy.Ion Phy.ics Peking University Beijing 100871 China

The surface defect distribution in stainless steel irradiated with intensepulsed ion beam (IPIB) of current density.above 60A/cm^2 and acceleration voltage 300-500ke V wasdiscussed and analy.ed. The defects near the surface of stainless steel were generated in two way.:(1) generated by.the bombardment of energetic ions and (2) induced by.the high level stress near thesurface. Thus the temperature and stress distributions near the steel surface were calculated by.eans of our STEIPIB code, which treated with the thermal-dy.amical process in the target irradiatedby.the IPIB. Based on these distributions, the generations and movements of these defects werediscussed and compared with the ex.eriment results.

关键词： IPIB defect coupled fluid elastoplastic equation