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Development of ancestors' cultivation revealed in phytolith assemblages from Guangfulin relics

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Chinese Science Bulletin 2003年第3期48卷 287-290页

作者： ZHANG Yulan1,2, ZHANG Minbin1 & SONG Jian3 1. Key laboratory of Marine Geology of the Ministry of Education, Tongji university, Shanghai 200092, China 2. state Key laboratory of Estuarine and Coastal research, East China Normal university, Shanghai 200062, China 3. Shanghai Museum, Shanghai 200003, China Key laboratory of Marine Geology of the Ministry of Education Tongji University Shanghai 200092 China state Key laboratory of Estuarine and Coastal research East China Normal University Shanghai 200062 China Shanghai Museum Shanghai 200003 China

Shanghai Museum has got great achievements in re-excavating Guangfulin relics. It is the first time that the cultural remains of Wangyoufang type is found above the Liangzhu cultural remains which comes from East Henan Province, providing previous materials for researching cul-ture evolution around Taihu Lake. Samples were taken from the immature soil layer and cultural layers of Guangfulin relics for phytolith analysis. According to the systemic re-search for the archaeological remains and phytolith fossil, the phytoliths in Guangfulin relics can be divided into four zones. The development of rice agriculture and living condi-tion of Guangfulin ancestors was discussed based on the ex-isting rice fan-shaped phytolith, rice shell phytolith, diatom fossil and archaeology evidence in the same layer. The Guangfulin relics has gradually developed since a high sea level 5000 years ago, and the broad rice agriculture has si-multaneously developed. The newly re-excavated relics pro-vides valuable materials for the research of ancestors and ancient culture in Shanghai.

关键词：上海 Guangfulin遗址远古农作物植物化石

Polycomb group proteins and their roles in carcinogenesis

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Chinese Science Bulletin 2012年第18期57卷 2259-2264页

作者： XIAO LanBo 1,2,3,TAO YongGuang 1,2,3,LI LiLi 1,2,3,4 & CAO Ya 1,2,31 Key laboratory of Carcinogenesis of Ministry of Health,Xiangya School of Medicine,Central South university,Changsha 410078,China 2 Key laboratory of Carcinogenesis and Cancer Invasion of Ministry of Education,Xiangya School of Medicine,Central South university,Changsha 410078,China 3 Cancer research Institute,Xiangya School of Medicine,Central South university,Changsha 410078,China 4 Cancer Epigenetics laboratory,state Key laboratory in Oncology in South China,Chinese university of Hong Kong,Hong Kong 999077,China Key laboratory of Carcinogenesis of Ministry of Health Xiangya School of Medicine Central South University Changsha China Key laboratory of Carcinogenesis and Cancer Invasion of Ministry of Education Xiangya School of Medicine Central South University Changsha China Cancer research Institute Xiangya School of Medicine Central South University Changsha China Cancer Epigenetics laboratory State Key Laboratory in Oncology in South China Chinese University of Hong Kong Hong Kong China

In the cell nucleus,DNA is wound around histone proteins,which are then packed together to form *** can be chemically tagged by methyl and acetyl *** group (PcG) proteins attach methyl groups to genes,which block their *** is similar to the attachment of methyl groups to gene promoters by DNA methyltransferases (DNMTs).This action is directly linked with tumor initiation and metastasis via the promotion of anti-senescence and anti-apoptosis pathways,and by facilitating epithelial mesenchymal transition (EMT).Cell fate transcriptional factors (CFTFs) and long non-coding RNAs (long ncRNAs) recruit PcG proteins to the promoters of tumor suppressor genes,resulting in epigenetic gene silencing by influencing chromatin structure and DNA ***,PcG proteins are potential diagnostic markers and targets for new chemoprevention and therapeutic strategies.

关键词：组蛋白 DNA甲基转移酶基因启动子癌变非编码RNA PEG 凋亡途径抑癌基因

Bacterial Pathogenesis as a Molecular Probe of plant Immunity,Cell Biology,and Jasmonate Signaling

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Bacterial Pathogenesis as a Molecular Probe of Plant Immunit...

Asynchronous cooperative communication systems:A survey on signal designs

中国植物病理学会第九届全国会员代表大会暨2010年学术年会

作者： Sheng Yang HE (Department of Energy plant research laboratory,michigan state university,East Lansing,MI 48824, USA.

plants have evolved a powerful and multi-layered immune system to defend against infection by most microbial ***,successful pathogens,such as the bacterial pathogen Pseudomonas syringae ***(Pst)strain DC3000,have deve...

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Science China(Information Sciences) 2011年第8期54卷 1547-1561页

作者： WANG HuiMing 1,2 & XIA XiangGen 3 1 School of Electronic and Information Engineering, Xi’an Jiaotong university, Xi’an 710049,China 2 state Key laboratory of Integrated Services Networks, Xidian university,Xi’an 710049, China 3 Department of Electrical and Computer Engineering,university of Delaware,Newark,DE 19716,USA School of Electronic and Information Engineering Xi’an Jiaotong University Xi’an China state Key laboratory of Integrated Services Networks Xidian University Xi’an China Department of Electrical and Computer Engineering University of Delaware Newark USA

Cooperative communications is a promising technique for future high speed wireless *** systems may be formulated as virtual multi-input multi-output (MIMO) systems where spatial/cooperetive diversity is a key advantage. However,different from MIMO systems,one of the major chal- lenges for cooperative communications systems is that the cooperative transmissions in cooperative systems may be neither time nor frequency synchronized,since the transmissions are from multiple cooperative nodes at different *** existing signal designs for co-located MIMO systems may not be able to collect the cooperative diversity in cooperative communications *** paper gives an overview of recent research efforts on combating the time and frequency asynchronism of the cooperative communication *** focus on the signal designs (or space-time codings/modulations) to achieve full cooperative diversity,and summarize some of the resent distributed space-timing coding and space-frequency coding techniques to combat timing errors and frequency offsets,and in the meantime to achieve full cooperative diversity,in both one-way and two-way cooperative networks.

关键词： cooperative communications time and frequency offsets space-time coding space-frequency codes full cooperative diversity linear receiver

Synthesis and Crystal Structure of O,O'-Diisopropyl-5-(4-chlorophenyl)-1-hydroxy-2E,4E-pentadienylphosphonate

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Chinese Journal of Structural Chemistry 2000年第4期19卷 267-270页

作者： SHI De Qing CHEN Ru Yu * WENG Lin Hong LENG Xue Bing (research Institute and state Key laboratory of Elemento Organic Chemistry, Nankai university, Tianjin 300071) 南开大学元素有机化学国家重点实验室天津 30 0 0 71

The crystal structure of the title compound C 17H 24ClO 4P ( M r =358 77), has been determined by single crystal X ray diffraction. The crystal is triclinic with space group P1, a=7.95(1), b=10.49(1), c=13.10(2) , α=68.218(2), β=77.998(2), γ=77.308(2)°. V=979.4(2)  3, Z=2, D c =1.213 g/cm 3, F(000)=378, μ (Mo Kα ) =0.292 mm -1 and final R=0.0798, wR =0.2222 for 3348 unique reflections ( I>2σ(I) ). X ray analysis reveals that the two carbon carbon double bonds in the molecule are of E,E configurations, which is in good agreement with the structure of 5 (4 chlorophenyl) 1 hydroxy 2E,4E pentadienylphosphonate.

关键词： crystal structure biological activity unsaturated phosphonate

Determination of Young's modulus by nanoindentation

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Science China(Technological Sciences) 2004年第4期47卷 398-408页

作者： MA Dejun1, Chung Wo Ong2, LIU Jianmin1 & HE Jiawen3 1. Surface Engineering research Institute, CMES, Beijing 100072, China 2. Department of Applied Physics and Materials research Center, The Hong Kong Polytechnic university, Hong Kong, China 3. state Key laboratory for Mechanical Behavior of Materials, Xian Jiaotong university, Xian 710049, China Surface Engineering research Institute CMES Beijing China Department of Applied Physics and Materials research Center The Hong Kong Polytechnic University Hong Kong China state Key laboratory for Mechanical Behavior of Materials Xi’an Jiaotong University Xi’an China

A methodology for determining Youngs modulus of materials by non-ideally sharp indentation has been developed. According to the principle of the same area-to-depth ratio, a non-ideally pyramidal indenter like a Berkovich one can be approximated by a non-ideally conical indenter with a spherical cap at the tip. By applying dimensional and finite element analysis to the non-ideally conical indentation, a set of approximate one-to-one relationships between the ratio of nominal hardness/reduced Youngs modulus and the ratio of elastic work/total work, which correspond to different tip bluntness, have been revealed. The nominal hardness is defined as the maximum indentation load divided by the cross-section area of the conical indenter specified at the maximum indentation depth. As a consequence, Youngs modulus can be determined from a nanoindentation test only using the maximum indentation load and depth, and the work done during loading and unloading processes. The new method for determining Youngs modulus is referred to as pure energy method. The validity of the method was examined by performing indentation tests on five materials. The experimental results and the standard reference values are in good agreement, indicating that the proposed pure energy method is a promising substitution for the most widely used analysis models at present.

关键词： Young's modulus, nanoindentation, nominal hardness, indentation work.

Ca2+ sparks and Ca2+ glows in superior cervical ganglion neurons

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Acta Pharmacologica Sinica 2006年第7期27卷 848-852页

作者： Li-jun YAO~(2,3,4) Gang WANG~(3,4) Kun-fu OU-YANG~3 Chao-liang WEI~3 Xian-hua WANG~3 Shi-rong WANG~3 Wei YAO~3 Hong-ping HUANG~3 Jian-hong LUO~2 Cai-hong WU~3 Jie LIU~3 Zhuan ZHOU(3,5) He-ping CHENG~(3,5)2 Department of Neurobiology,Zhejiang university School of Medicine,Hangzhou 310031,China 3 Institute of Molecular Medicine and state Key laboratory of Biomembrane Engineering,Peking university,Beijing 100871,China Department of Neurobiology Zhejiang University School of Medicine Hangzhou China Institute of Molecular Medicine and state Key laboratory of Biomembrane Engineering Peking University Beijing China

Aim:Ca2+release from the endoplasmic reticulum（ER）is an integral component ofneuronal Ca2+*** present study is to investigate properties of localCa2+release events in superior cervical ganglion（SCG）***:Pri-mary cultured SCG neurons were prepared from neonatal rats（P3-P7）.Low con-centration of caffeine was used to induce Ca2+release from the ER Ca2+store,andintracellular Ca2+was recorded by high-resolution line scan confocal imaging andthe Ca2+indicator ***:Two populations of local Ca2+release eventswith distinct temporal characteristics were evoked by 1.5 mmol/L caffeine near thesurface membrane in the soma and the neurites of SCG *** eventssimilar to classic Ca2+sparks lasted a few hundreds of milliseconds,whereas long-lasting events displayed duration up to tens of *** somatic andneurite sparks were of 0.3-and 0.52-fold increase in local Fluo-4 fluorescence,*** Ca2+glows were brighter（ΔF/F0approximately 0.6）,butwere highly confined in *** half maximum of full duration of neurite sparkswas much longer than those in the soma（685 vs 381 ms）.Conclusion:Co-exist-ence of Ca2+sparks and Ca2+glows in SCG neurons indicates distinctive localregulation of Ca2+release *** local Ca2+signals of variable,site-specifictemporal length may bear important implications in encoding a"memory"of thetrigger signal.

关键词： superior cervical ganglion neurons Ca2+ sparks ryanodine receptors caffeine

Synthesis of N-t-Butyl-N'-Aminocarbonyl-N-(Substituted) Benzoylhydrazine Containing α-Aminoalkylphosphonate Groups

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Chinese Chemical Letters 2000年第5期11卷 401-402页

作者： Qing Min WANG Run Qiu HUANG Zai Guo LI Rut Lian SHAO (research Institute and state Key laboratory of Elemento-Organic Chemistry, Nankai university, Tianjin 300071) Res. Inst. state Key Lab. E. Nankai University Tianjin 300071 China

A variety of novel N-t-butyl-N'-aminocarbonyl-N-(substitute)Benzoylhydrazines containing α-aminoalkylphosphonate groups were synthesized by the addition of N-t-butyl-N- (substituted)benzoylhydrazines to α-isocyanatoalkylphosphonates. which were synthesized by the reaction of α-aminoalkylphosphonates with triphosgene in good yields. The structures of products including by-products were confirmed by 1H NMR, 31P NMR. IR, mass spectroscopy- and elemental analysis.

关键词： Diacylhydrazines,α-aminoalkylphosphonates triphosgene.

Recent studies on chemistry of novel μ-CO-containing butterfly Fe/E (E=S,Se,Te) cluster salts

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Science China Chemistry 2009年第1期52卷 1-14页

作者： SONG LiCheng Department of Chemistry, state Key laboratory of Elemento-Organic Chemistry, Nankai university, Tianjin 300071, China Department of Chemistry State Key Laboratory of Elemento-Organic Chemistry Nankai University Tianjin China

This article describes recent developments in chemical study on a series of butterfly-shaped μ-CO-containing Fe/E (E = S, Se, Te) cluster salts. These salts include eleven novel cluster anions, which are the single butterfly one μ-CO-containing [(μ-RE)(μ-CO)Fe2(CO)6]- (A), the double butterfly two μ-CO-containing {[(μ-CO)Fe2(CO)6]2(μ-EZE-μ)}2- (B, E = S; C, E = Se), the triple butterfly three μ-CO- containing {[(μ-CO)Fe2(CO)6]3[(μ-SCH2CH2)3N]}3- (D), {[(μ-CO)Fe2(CO)6]3[1,3,5-(μ-SCH2)3C6H3]}3- (E), {[(μ- CO)Fe2(CO)6]3[(μ-SCH2)3CMe]}3- (F), the double butterfly one μ-CO-containing {[(μ-CO)Fe2(CO)6] [Fe2(CO)6][(μ-SCH2)3CMe]} - (G) derived in situ from F, the quadruple butterfly four μ-CO-containing {[(μ- CO)Fe2(CO)6]4[1,2,4,5-(μ-SCH2)4C6H2]}4- (H), the triple butterfly two μ-CO-containing {[(μ-CO)Fe2(CO)6]2 [Fe2(CO)6][1,2,4,5-(μ-SCH2)4C6H2]}2- (I) derived in situ from H, the quadruple butterfly four μ-CO-con- taining {[(μ-CO)Fe2(CO)6]4[(μ-SCH2)4C]}4- (J), and the triple butterfly two μ-CO-containing {[(μ-CO)Fe2 (CO)6]2[Fe2(CO)6][(μ-SCH2)4C]}2- (K) derived in situ from J. This article describes not only the synthetic methods for formation of such anionic cluster (A-K) salts, but also their novel reactions leading to various new types of butterfly Fe/E cluster complexes. All these findings described in this article are important both theoretically and practically.

关键词： butterfly cluster synthesis structure reaction mechanism