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| 1 | New Families in the Stable Homotopy of Spheres Revisited | LIN Jin Kun Department of Mathematics. Nankai University. Tianjin 300071. P. R. China | 2002 | Acta Mathematica Sinica,English Series2002，18，1： | 12 |
| 2 | Current progress and prospects of induced pluripotent stem cells显示文摘Induced pluripotent stem(iPS) cells are derived from somatic cells by ectopic expression of few transcription factors.Like embryonic stem(ES) cells,iPS cells are able to self-renew indefinitely and to differentiate into all types of cells in the body.iPS cells hold great promise for regenerative medicine,because iPS cells circumvent not only immunological rejection but also ethical issues.Since the first report on the derivation of iPS cells in 2006,many laboratories all over the world started research on iPS cells and have made significant progress.This paper reviews recent progress in iPS cell research,including the methods to generate iPS cells,the molecular mechanism of reprogramming in the formation of iPS cells,and the potential applications of iPS cells in cell replacement therapy.Current problems that need to be addressed and the prospects for iPS research are also discussed. | CHEN LingYi & Liu Lin Key Laboratory of Bioactive Materials of Ministry of Education,College of Life Sciences,Nankai University,Tianjin 300071,China | 2009 | Science China(Life Sciences)2009，52，7： | 11 |
| 3 | Semibatch Emulsifier-free Emulsion Copolymerization of Methyl Methacrylate and n-Butyl Acrylate in the Presence of 2-Hydroxyethyl Methacrylate显示文摘The sendbatch emulsifier-free emulsion copolymerization of methyl methacrylate (MMA) and n-butyl acrylate (BA) in the presence of 2-hydroxyethyl methacrylate (HEMA) initiated by K2S2O8 (PSP) was studied. The average palticle diameter increases with an increase of total solids content, HEMA content, PSP content, ionic strength of the system and monomer feed rate, and decreases with the monomer feed ratio from 3/1 (MMA/BA mole.) to 1/3. The stability of this reaction system is improyed by adding HEMA as nonionic comonomer. The high so1ids content (50%) latex with monodisperse particle can be obtained using this process. | Tian Ying GUO Mou Dao SONG Qing Ye ZHOU Bang Hua ZHANG Jian Biao MA Bing Lin HE (The State key Laboratory of Functional Polymer Materials for Adsorption and Separation,Institute of Polymer Chendstry, Nankai University, Tianin, 300071) | 1998 | Chinese Chemical Letters1998，9，7： | 4 |
| 4 | The Site Symmetry of Eu^(3+) in ZnS:Eu Nanoparticle显示文摘Nanosized ZnS doped with different concentrations of Eu3+ were prepared andanalyzed by x-ray diffraction technique. The experimental results show that ZnS belongs to thecubic structure. From the photoluminescence (PL) emission spectra, it can be seen that the ratioof the emission intensity of Eu3+ at 616 nm to that at 590 nm increases as the increasing of Eu3+.This phenomenon reveals that the site symmetry of Eu3+ reduces as the increasing of Eu3+. | Xiao Lin SUN Gut Lan ZHANG Guo Qing TANG Wen Ju CHEN(Opto-electronic Information Science and Technology Lab, MOE., Institute of Modern Optics,Nankai University, Tianjin 300071)Guang Yan HONG(Changchun Institute of Applied Chemistry, Changchun 130022) | 1999 | Chinese Chemical Letters1999，10，9： | 3 |
| 5 | AN AB INITIO STU DY ON THE CORELATION BETWEEN THE ABSOLUTE CONFIGURATION AND THE CD SPECTRA OF ORGANIC PEROXIDES显示文摘Correlation between the absolute configuration and the CDspectra of organic peroxides was studied by ab initio method with a mo-d el moleeule CH3-O-O-CH3.For P form when 0°≤θ(twist angle of C-O-O-C)<90°, there is positive Cotton effect;when 90°<θ≤180°, there is nega-tive Cotton effect;the curve is bisignate at θ=90°. | Jing Jiang LIU Gua Lin DUAN Chemistry Dept.,Nankai Univ.,Tianjin,300071 Xiao Tian Liang Institute of Materia Medica,Beijing,100050 | 1991 | Chinese Chemical Letters1991，2，3： | 2 |
| 6 | Two-photon spectroscopic behaviors and photodynamic effect on the BEL-7402 cancer cells of the new chlorophyll photosensitizer显示文摘The spectroscopic properties of a new chlorophyll derivate photosensitizer(CDP) are studied under the excitation wavelengths at 800 and 400 nm using femtosecond pulses from a Ti:sapphire laser.The damaging effect of CDP on the BEL-7402 cancer cells is also investigated upon two-photon illumination at 800 nm.The normalized fluorescence spectra of CDP in tetrahydrofuran(THF) show that two-photon and one-photon spectra have the same distributions and the same emission bands(675 nm).The life-times of two-and one-photon induced fluorescence of this molecule are of the order of 5.0 ns.By comparing the data it is shown that there is some difference between the two lifetimes,but the differ-ence is less than one nanosecond.The two-photon absorption cross section of the molecule is also measured at 800 nm and estimated as about σ′2 ≈ 31.5×10-50 cm4·s·photon-1.The results of two-photon photodynamic therapy(TPPDT) tests show that CDP can kill all of the tested cancer cells according to the usual Eosine assessment.Our results indicate that the two-photon-induced photophysical,photo-chemical and photosensitizing processes of CDP may be basically similar to those of one-photon ex-citation.These behaviors of the sample suggest that one may find other possible methods to estimate some photosensitizers' effects in details such as their distribution in cells and the reactive targets of the sub-cellular parts of some tumor cells via two-photon excitation techniques. | ZHAO PeiDe1,2,CHEN Ping1,TANG GuoQing1,LIU JinWei2,LIN Lie1,GUO Peng1,YU Qing2, YAO JianZhong3,MA DongMing4,ZHANG GuiLan1 & CHEN WenJu1 1 Key Laboratory of Optoelectronic Information Science and Technology,Ministry of Education,Institute of Modern Optics,Nankai University,Tianjin 300071,China 2 Department of Physics,Hebei University of Technology,Tianjin 300130,China 3 College of Pharmacy,Second Military Medical University,Shanghai 200433,China 4 Tianjin College of the Traditional Chinese Medicine,Tianjin 300193,China | 2008 | Science China Chemistry2008，51，6： | 2 |
| 7 | Entanglement of Polymer Chains in Concentrated Region by Fluorescence Probe Technique显示文摘The fluorescence of polystyrene labeled with pyrenyl groups has been investigated inconcentrated solutions. The ratio of excimer to monomer intensities (Ic/Im )of pyrenyl labels isfound to vary with increaSing polymer concentration (C) and display tyactional dependence on theC. A critical concentration. Cm at about 0.32g/ml, is tirst manifested. The results arc interpreted byinterchain interaction and entanglement of polymer chains. | Xin Song LI Guo Chang WANG Bing Lin HE(1 Department of Chemical Engineering, Southeast University. Nanjing 2100962 Institute of polymer Chemistry, Nankai University. Tianjin 300071) | 1999 | Chinese Chemical Letters1999，10，9： | 1 |
| 8 | The Luminescence of The Phosphor Sr_2ZrO_4 with One-dimensional Chains Structure显示文摘A new type of phosphor Sr2ZrO4 with one-dimensional structure was prepared bysolid reaction and its luminescence is seen at room temperature. The excitation and emissionspectra were measured and display broad maximum at 354 nm and 386 nm respectively. Themechanism of this luminescence is ascribed to charge transfer. | Lei ZHANG Guang Yan HONG Xiao Lin SUN(1Changchun institute of Applied Chemistry. Chinese Academy of SciencesLaboratory of Rare Earth Chemistry and Physics. Changchun 1300222Institute of Modern Optics, Nankai University. Tianjin 300071) | 1999 | Chinese Chemical Letters1999，10，9： | 1 |
| 9 | MAXIMUM INFORMATION AND OPTIMUM ESTIMATING FUNCTION显示文摘In order to construct estimating functions in some parametric models, this paper introducestwo classes of information matrices. Some necessary and sufficient conditions for the informationmatrices achieving their upper bounds are given. For the problem of estimating the median,some optimum estimating functions based on the information matrices are acquired. Undersome regularity conditions, an approach to carrying out the best basis function is introduced. Innonlinear regression models, an optimum estimating function based on the information matricesis obtained. Some examples are given to illustrate the results. Finally, the concept of optimumestimating function and the methods of constructing optimum estimating function are developedin more general statistical models. | LIN Lu Department of Statistics, School of Mathematical Sciences, Nankai University, Tianjin 300071, China. | 2003 | Chinese Annals of Mathematics,Series B2003，24，3： | 1 |
| 10 | ASYMMETRIC MICHAEL-TYPE ALKYLATION OF CHIRAL IMINES DIASTEREOSELECTIVE SYNTHESIS OF(+)-α-CYPERONE AND (-)-10-EPI-α-CYPERONE显示文摘ASYMMETRIC MICHAEL-TYPE ALKYLATION OF CHIRAL IMINES DIASTEREOSELECTIVE SYNTHESIS OF(+)-α-CYPERONE AND (-)-10-EPI-α-CYPERONEAS... | Zhao Ming XIONG Jiong YANG Yu Lin LI Ren An LIAO Zheng Ming LI(State Key Laboratory of Applied Organic Chemistry and Instute of Organic Chemistry, Lanzhou University,Lanzhou 730000, State Key Laboratory of Elemento-Organic Chendsny, Nankai University, | 1996 | Chinese Chemical Letters1996，7，8： | 1 |
| 11 | IMMOBILIZATION OF AMINOACYLASE FROM ASPERGILLUS ORYZAE ON CHLOROMETHYLATED CROSS-LINKED POLYSTYRENES显示文摘A number of chlorumethylated polystyrenes were synthesized and tried to immobilize aminoacylase from Aspergillus oryzae and many factors which affected immobilized enzyme activity were studied in detail. The results indicated that the immobilized enzyme on support(IAR-1) possessed high enzymatic activity and high stability. | Dao Bin WANG~* Pins JIANG Bins Lin HE Institute of Polymer Chemistry, Nankai University, Tianjin 300071 | 1992 | Chinese Chemical Letters1992，3，7： | 0 |
| 12 | FERROMAGNETICALLY COUPLED BINUCLEAR Fe(Ⅲ) COMPLEXES THROUGH ISOPHTHALATO-BRIDGE显示文摘FERROMAGNETICALLY COUPLED BINUCLEAR Fe(Ⅲ) COMPLEXES THROUGH ISOPHTHALATO-BRIDGEFERROMAGNETICALLYCOUPLEDBINUCLEARFe(Ⅲ)COMPLEXE... | Yan Tuan LI Dai Zheng LUO Zong Hui JIANG Geng Lin WANG(Department of Chemistry, Nankai University, Tianjin, 300O71.) | 1994 | Chinese Chemical Letters1994，5，9： | 0 |
| 13 | FERROMAGNETIC INTERACTION BETWEEN GADOLINIUM(Ⅲ) AND COPPER (Ⅱ)IONS IN N,N'-BIS(2-AMINOPROPYL)OXAMIDO COPPER(Ⅱ) BRIDGED BINUCLEAR Gd(Ⅲ)-Cu(Ⅱ) COMPLEX显示文摘FERROMAGNETICINTERACTIONBETWEENGADOLINIUM(Ⅲ)ANDCOPPER(Ⅱ)IONSINN,N'-BIS(2-AMINOPROPYL)OXAMIDOCOPPER(Ⅱ)BRIDGEDBINUCLEARGd(Ⅲ)-Cu... | Yan Tuan LI Dai Zheng LIAO Zong Hui JIANG Shi Ping YAN and Geng Lin WANG(Department of Chemisstry. Nankai University. Tianjin. 300071) | 1994 | Chinese Chemical Letters1994，5，8： | 0 |
| 14 | Synthesis and Structure of Mixed Distannoxane Dimers [ClR_2SnOSnR'_2Cl]_2显示文摘Mixed distannoxane dimers [ClR2SnOSnR’2Cl]2 were synthesized by the reaction of R2SnO (R = Bu, Pr) and R2SnCl2 (R = Me, Ph, Cy, Oct). The crystal structures of compound 1 and 5 show they are ladder-type dimers that contain a central planar Sn2O2 four-membered ring. Both endo- and exo-Sn atoms are five-coordinate. | Yan L? Lin Hong WENG, Zhi Li LAN, Jing LI, Qing Lan XIE* National Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071 | 2002 | Chinese Chemical Letters2002，13，2： | 0 |
| 15 | Synthesis and Properties of Dinuclear Cu( Ⅱ ) Complexes Derived from Oxamidobis(propionato)cuprate( Ⅱ )显示文摘Three dinuclear complexes were synthesized and designated as Cu(obp)CuL where obp =oxamidobis(propionato), L=2,2’ -bipyridyl(bpy) (1), 1 , 10-phenathroline(phen)(2) and 5-nitro-1, 10-phenathroline(NO2-phen)(3). The complexes were characterized by elemental analyses, in fared and electronic spectra, magnetic susceptibilities and ESR spectra, indicating antiferromagnetic spin exchange interactions between metal ions. | Liao Daizheng, Lin Bing Wang Genglin (Department of Chemistry, Nankai University, Tianjin) | 1991 | Chemical Research in Chinese Universities1991，7，1： | 0 |
| 16 | Bioisosterism between Sulfonyl Group and Phosphoryl Group-The Synthesis of New ALS Inhibitors N-(Arylamino Hydroxyl Phosphoryl)-N'-(4,6-Dimethoxypyrimidine-2-yl)ureas显示文摘In view of the isosterism of sulfonyl group (-SO2-) and phosphoryl group [-P(O)(OR)-,R=H, CH3, C2H5, etc], a new type of ureas, that is, N-phosphoryl-N’-(4,6-dimethoxypyrimidin-2yl) ureas 2 were synthesized and shown to be a new class of acetolactate synthase (ALS) inhibitors. | Guo Feng ZHAO Hua Zheng YANG Lin Xiu WANG Yong Hong LI(Institute of Elemento-Organic Chemistry, National Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianin 300071) | 1998 | Chinese Chemical Letters1998，9，8： | 0 |
| 17 | STUDIES ON MACROCYCLIC DITERPENOIDS(XI)──A Convergent and Stereoselective Synthesis of Cembrenene Precursor-4,10-Dimethyl-7-Isopropenyl-14-Oxo-3Z,5E,10E-Pentadecatrienal显示文摘STUDIES ON MACROCYCLIC DITERPENOIDS(XI)──A Convergent and Stereoselective Synthesis of Cembrenene Precursor-4,10-Dimethyl-7-I... | Wei Dong LI Yu Lin LI Ying LI (State Key Laboratory of Elemento-Organic Chemistry, Nankai University,Tian jin 300071)(Institute of Organic Chemistry, Lanzhou University,Lanzhou 730000) | 1994 | Chinese Chemical Letters1994，5，2： | 0 |
| 18 | Synthesis and Magnetism of 2-Hydroxy-1,3-propylene-bis(oxamato)-bridged Co~ⅡCu~ⅡCo~Ⅱ Complexes显示文摘SynthesisandMagnetismof2┐Hydroxy┐1,3┐propylene┐bis(oxamato)┐bridgedCoⅡCuⅡCoⅡComplexesMIAOMing-ming,CHENGPeng,LIAODai-zhengJIA... | MIAO Ming ming, CHENG Peng, LIAO Dai zheng JIANG Zong hui and WANG Geng lin ** (Department of Chemistry, Nankai University, Tianjin, 300071) | 1997 | Chemical Research in Chinese Universities1997，13，4： | 0 |
| 19 | IMMOBILIZATION OF PORCINE PANCREATIC LIPASE ON CROSS-LINKED POLYSTYRENE显示文摘IMMOBILIZATIONOFPORCINEPANCREATICLIPASEONCROSS-LINKEDPOLYSTYRENE￥ZhiDongXIE;BingLinHE(InstituteofPolymerChemistry,NankaiUnive... | Zhi Dong XIE Bing Lin HE (Institute of Polymer Chemistry, Nankai Univeraity, Tianjin 300071) | 1994 | Chinese Chemical Letters1994，5，2： | 0 |
| 20 | Pretrained Models and Evaluation Data for the Khmer Language显示文摘Trained on a large corpus,pretrained models(PTMs)can capture different levels of concepts in context and hence generate universal language representations,which greatly benefit downstream natural language processing(NLP)tasks.In recent years,PTMs have been widely used in most NLP applications,especially for high-resource languages,such as English and Chinese.However,scarce resources have discouraged the progress of PTMs for low-resource languages.Transformer-based PTMs for the Khmer language are presented in this work for the first time.We evaluate our models on two downstream tasks:Part-of-speech tagging and news categorization.The dataset for the latter task is self-constructed.Experiments demonstrate the effectiveness of the Khmer models.In addition,we find that the current Khmer word segmentation technology does not aid performance improvement.We aim to release our models and datasets to the community in hopes of facilitating the future development of Khmer NLP applications. | Shengyi Jiang Sihui Fu Nankai Lin Yingwen Fu | 2022 | Tsinghua Science and Technology2022，27，4： | 0 |
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