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Ageing in worms:n-acylethanolamines take control

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Protein & Cell 2011年第9期2卷 689-690页

作者： Run shen The Salk Institute for Biological Studies 10010 North Torrey Pines RoadLa JollaCA 92037USA

Studies of dietary restriction’s effect on lifespan extension in *** and other model organisms have greatly expanded our knowledge about genetic network underly.ng stress response,ageing,and ageing related *** key molecules and signaling pathways implicated are Foxo(daf-16)and Foxa(pha-4)transcriptional factors and the nutrient sensing insulin/TOR pathway(Wolkow et al.,2000;Panowski et al.,2007;Hansen et al.,2008).

关键词： stress Ageing expanded

PROBE FOR THE FORMATIOn RATIO BETWEEn EXCITED TRIPLETS AnD SInGLETS AS GEnERATED In POLyMER LIGHT-EMITTInG DIODES

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Chinese Journal of Polymer Science 2001年第6期19卷 591-596页

作者： Jing-y.ng Zhang shi-dong Kan yu-guang Ma Jia-cong shen Key Lab for Supramolecular Structure and Spectroscopy of Ministry of Education, Jilin University Changchun 130023, China Jilin Univ Key Lab Supramol Struct & Spect Minist Educ Changchun 130023 Peoples R China

The electroluminescence (EL) produced by a highly luminescent phosphorescent dye Cu-4(CdropCPh)(4)L-2 (L = 1.8-bis(di-phenylphosphino)-3,6-dioxaoctane, Cu-4) doped polymer as emitting layer is reported. The effects of the charge injection balance on the polymers, in particular, poly.n-vinylcarbazole) (PVK) have been studied by using photoluminescence and electroluminescence spectroscopy. Changes in the emission spectra demonstrate the influence of the charge injection balance on the formation ratio of triplet and singlet excitons. This provides a new technical approach to realize the color patterning in polymer LEDs.

关键词： electroluminescence organic polymer triplet exciton

Effect of nitrogenous Fertilizer Treatment on Mineral Metabolism in Grazing yaks

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Agricultural Sciences in China 2009年第3期8卷 361-368页

作者： shen Xiao-y.n Department of Biology Chongqing University of Science and Technology Chongqing 401331 P.R.China Key Laboratory of Animal Ecology and Conservation Biology Institute of Zoology Chinese Academy of Sciences Beijing 100101 P.R. China

To assess the impact of n fertilization on contents of mineral elements in herbage and the effect of increased forage S on the copper metabolism of grazing yaks, study was conducted during the summer grazing season （2005, 2006, and 2007）. Pasture replicates （20 ha; n=3 per treatment） received the same fertilizer treatment in each growing season, consisting of i） 90 kg n ha^-1 from quickly available nitrogen, ii） 90 kg n ha^-1 from ammonium nitrate, iii） 90 kg n ha^-1 from ammonium sulfate, and iv） control （no fertilizer）. Forage sampling was collected at 60 days intervals following fertilization （10 samples per pasture） for Cu, Mo, Mn, Se, Fe, Zn, Ca, and P. To determine the effect of fertilizer treatment on mineral metabolism in grazing yaks, liver and blood samples were collected at the start and end of the study period in 2005, 2006, and 2007. Ammonium sulfate fertilization increased （P 〈 0.01） forage S concentration. Plant tissue n concentrations were increased by.n fertilization, regardless of source in 2005, 2006, and 2007. yaks grazing S fertilization pastures had lower （P〈0.05） liver and blood Cu concentrations at the end of the study period in 2005, 2006, and 2007, compared with urea, ammonium nitrate, and control. nominal increases in forage in vitro organic matter digestibility were realized by fertilization, regardless of n source in each year.

关键词： yaks nitrogen fertilizer treatment alpine meadow forage mineral element metabolism

Blue Electroluminescent Diodes Utilizing Blend of Poly (2,5-Dibutoxyphenylene) in Poly (n-Vinylcarbazole)

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Chinese Physics Letters 1996年第12期13卷 944-946页

作者： HUAnG Jing-song ZHAnG Hai-feng An Hai-y.n TIAn Wen-jing HOU Jing-y.ng CHEn Bai-jun LIU shi-y.ng shen Jia-cong national Laboratory of Integrated Optoelectronics Jilin UniversityChangchun 130023 Key Laboratory of Molecular Spectra and Molelcular Structure Jilin UniversityChangchun 130023

Blue emission from polymer blends composed of poly(2,5-dibutoxyphenyiene)(PPP)in a matrix polymer poly.n-vinylcarbazole)(PVK)is *** light-emitting layer can be fabricated by spin-coating of PPP-PVK blend solution without subsequent processing or heat treatment.A cell structure of glass substrate/indium-tin-oxide/PPP-PVK blend/aluminum is *** light emission with a peak position at 448nm occurs at a bias of about 8V.

关键词： carbazole subsequent blends

Regularity Results for the Generalized Beltrami System

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Acta Mathematica Sinica,English Series 2004年第2期20卷 293-304页

作者： shen Zhou ZHEnG Department of Mathematics Northern Jiaotong UniversityBeijing 100044P.R.China Institute of Applied Mathematics Academy of Mathematics and Systems ScienceChinese Academy of SciencesBeijing 100080P.R.China

For the generalized Beltrami system with two characteristic matrices, we deal with the regularity of its very weak solutions in the Sobolev class (1 < r < n). By changing the generalized Beltrami system into a class ... 详细信息

For the generalized Beltrami system with two characteristic matrices, we deal with the regularity of its very weak solutions in the Sobolev class (1 n). By changing the generalized Beltrami system into a class of a divergent elliptic system with nonhomogeneous items, we obtain that each of its very weak solutions is essentially a classical weak solution of a usual Sobolev class. Furthermore, we also establish a higher regularity of its weak solution if the regularity hypotheses of two characteristic matrices are improved.

关键词： Weakly K-quasiregular Generalized Beltrami system Very weak solutions Hodge decomposition Generalized reverse Holder inequality

A Local Hlder Estimate of(K_1, K_2)-Quasiconformal Mappings between Hypersurfaces

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Acta Mathematica Sinica,English Series 2015年第9期31卷 1379-1390页

作者： shen Zhou ZHEnG Department of Mathematics Beijing Jiaotong University

In this paper, we prove a local HSlder estimate of （K1, K2）-quasiconformal mappings be- tween n-dimensional hypersurfaces of Rn＋l under an assumption of bounded mean curvature of the original hypersurface M. With some new ingredients of the isoperimetric inequality and the co-area formula on manifolds, we extend Simon＇s work of quasiconformal mappings on surfaces of R3 to the setting of n-dimensional hypersurfaces of Rn＋1.

关键词： (K1 K2)-quasiconformal mappings isoperimetric inequality co-area formula

High-Spin States in Transuranium nuclei ^(242,244)Pu

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Chinese Physics Letters 2012年第5期29卷 77-80页

作者： ZHAO yue KAnG Xu-Zhong shen Shui-Fa y.n yu-Peng HE Chuang-ye y.n shi-Wei Engineering Research Center of nuclear Technology Application(Ministry of Education) East China Institute of TechnologyNanchang 330013 School of Physics Suranaree University of TechnologyNakhon Ratchasima 30000Thailand International Centre for Materials Physics Chinese Academy of SciencesShenyang 110016 Fundamental Science on Radioactive Geology and Exploration Technology Laboratory East China Institute of TechnologyFuzhou 344000 State Key Laboratory of nuclear Physics and Technology Peking UniversityBeijing 100871 Thailand Center of Excellence in Physics(ThEP) Commission on Higher Education328 Si Ayutthaya RoadRatchathewiBangkok 10400Thailand China Institute of Atomic Energy P.O.Box 275(10)Beijing 102413 College of nuclear Science and Technology Beijing Normal UniversityBeijing 100875

We investigate the structure of yrast bands in the transuranium nuclei ^(242)Pu and ^(244)Pu in the framework of the projected shell model,which is a fully quantum mechanical and microscopic *** is found that an appropriate modification of the standard nilsson spin-orbital parameters in the n =6 proton shell is necessary to correctly describe the high-spin backbending phenomenon in nucleus ^(244)*** order to test whether this modification is correct,the same modified parameters are used to calculate the yrast band of its neighboring isotope ^(242)*** is found that without this modification,a backbending will occur at spin I =20,which is not supported by the experimental data.

关键词： bending neighboring bands

On Three Differential Equations Associated with Chebyshev Polynomials of Degrees 3,4 and 6

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Acta Mathematica Sinica,English Series 2017年第1期33卷 21-36页

作者： Li Chien shen Department of Mathematics University of Florida Gainesville FL 32611-8105

We shall study the differential equation y^l2=Tn（y）-（1-2μ2）;where μ2 is a constant, Tn（x） are the Chebyshev polynomials with n = 3,4,6. The solutions of the differential equations will be expressed explicitly in terms of the Weierstrass elliptic function which can be used to construct theories of elliptic functions based on 2F1 （1/4, 3/4; 1; z）, 2F1 （l/3, 2/3; 1; z）, 2F1 （1/6, 5/6; 1; z） and provide a unified approach to a set of identities of Rmanujan involving these hypergeometric functions.

关键词： Chebyshev polynomials Eisenstein series Jacobi theta functions Weierstrass ellipticfunction

Large reversible magnetocaloric effect in antiferromagnetic Er_(3)Si_(2)C_(2) compound

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Journal of Rare Earths 2024年第8期42卷 1555-1559,I0005页

作者： Hao Sun Lu Tian Xinqiang Gao Zhaojun Mo Jun shen Baogen shen School of Rare Earths University of Science and Technology of ChinaHefei230026China Ganjiang Innovation Academy Chinese Academy of SciencesGanzhou341000China Department of Energy and Power Engineering School of Mechanical EngineeringBeijing Institute of TechnologyBeijing100081China

The magnetic properties,magnetic phase transition and magnetocaloric effects(MCE) of Er_(3)Si_(2)C_(2) compound were investigated based on theoretical calculations and experimental *** on the first principles calculations,the antiferromagnetic(AFM) ground state type in Er_(3)Si_(2)C_(2) compound was predicted and its electronic structure was *** experimental results show that Ei_(3)Si_(2)C_(2) compound is an AFM compound with the neel temperature(T_(n) of 7 K and undergoes a field-induced firstorder magnetic phase transition from AFM to ferromagnetic(FM) under magnetic fields exceeding 0.6 T at 2 *** magnetic transition process of Er_(3)Si_(2)C_(2) compound was investigated and *** values of the maximum magnetic entropy change(-ΔS_(M)^(max)) and the refrigeration capacity(RC) are 17 J/(kg·K)and 193 J/kg under changing magnetic fields of 0-5 T,*** a potential cryogenic magnetic refrigerant,the Er_(3)Si_(2)C_(2) compound also provides an interesting research medium to study the magnetic phase transition process.

关键词： Magnetic materials Magnetocaloric Metamagnetic transitions Magnetic phase transition Rare earths