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Search Results: 1 - 10 of 104197 matches for " ShuangQuan Zhang "
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Tris(ethylenediamine-κ2N,N′)cobalt(III) aquatris(oxalato-κ2O1,O2)indate(III)
Zhe Zhang,Fuxiang Wang,Shuangquan Liao
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536811053736
Abstract: In the cation of the title compound, [Co(C2H8N2)3][In(C2O4)3(H2O)], the CoIII atom is coordinated by six N atoms from three ethylenediamine molecules. The CoIII—N bond lengths lie in the range 1.956 (4)–1.986 (4) . In the anion, the InIII atom is seven-coordinated by six O atoms from three oxalate ligands and by a water molecule. The cations and anions are linked by extensive O—H...O and N—H...O hydrogen bonds, forming a supermolecular network.
Mortality profiles of the large herbivores from the Lingjing Xuchang Man Site, Henan Province and the early emergence of the modern human behaviors in East Asia
ShuangQuan Zhang,ZhanYang Li,Yue Zhang,Xing Gao
Chinese Science Bulletin , 2009, DOI: 10.1007/s11434-009-0648-7
Abstract: This paper presents the results of a detailed study of mortality profiles of the large herbivores from the Middle Palaeolithic (MP) bone assemblage of the Lingjing Xuchang Man Site, Henan Province. Based on the analysis of the crown heights of fossil teeth from this assemblage, we come to a conclusion that aurochs (Bos primigenius) and horse (Equus caballus) are the major prey species in this assemblage and the age structures of these animals can be best described as the “prime-dominated pattern”. This study confirmed the well-established notions at many Middle and Upper Palaeolithic sites across Eurasia and Africa that MSA/MP foragers were fully effective in hunting aggressive prey species, particularly aurochs and horse. This find indicates that the hunting behaviors and subsistence strategies were not significantly different between MP and UP (the Upper Palaeolithic) humans in East Asia and hence suggests the early emergence of the modern human behaviors in this area.
Cut marks and terminal Pleistocene hominids in the Ma’anshan site: Evidence for meat-eating
Yue Zhang,ChunXue Wang,ShuangQuan Zhang,Xing Gao
Chinese Science Bulletin , 2009, DOI: 10.1007/s11434-009-0616-2
Abstract: In this paper, cut marks on the long bones of class II sized animals in the Ma’anshann site are studied. Based on the location and frequencies of the long bone cut marks, the distribution characteristics are analyzed as follows: (1) cut mark frequencies in the lower layer (LL) are much higher than those of the upper; (2) in the LL cut mark frequency of the upper limbs is the highest, and that of the middle and lower limbs is lower and the lowest; (3) In the upper layer (UL) the cut mark frequency, does not spread as orderly as in the LL. The data are compared to those of the experiment and it is demonstrated that values of the LL all fall into the experimental 95% confidence intervals, and the cut mark frequencies of the upper, middle and lower limbs coincide with those of the experiment; while the values of the UL are much lower, of which, those of the humerus, femur and radius are out of the intervals, and the frequencies of the upper, middle and lower limbs are far more different from those of the experiment. It implies that the earlier hominids (of the LL) defleshed the limbs of the class II sized animals with stone tools more completely than the later hominids. With the evidence of burning marks, it is suggested that the difference on the roasting behaviors derived the cut mark difference of the Ma’anshan UL and LL.
Taphonomic analysis of the Lingjing fauna and the first report of a Middle Paleolithic kill-butchery site in North China
ShuangQuan Zhang,Xing Gao,Yue Zhang,ZhanYang Li
Chinese Science Bulletin , 2011, DOI: 10.1007/s11434-011-4718-2
Abstract: More than ten thousand bone fragments were recovered from the Lingjing site, Henan Province, during 2005 and 2006. A taphonomic analysis of the faunal remains strongly indicates that hominids have a dominant role in the accumulation and modification of the assemblage. Based on the taphonomic and zooarcheological characteristics of the animal remains, including species richness, mortality patterns, skeletal element profiles, and bone surface-modifications, and on the local ecology, we suggest that the Lingjing site is a Middle Paleolithic kill-butchery site rather than a home base for early humans. The presence of large numbers of stone artifacts may therefore signify a strong sense of planning and farsightedness in the subsistence strategies of early human groups. The Lingjing site is presently the only taphonomically-identified, Middle Paleolithic kill-butchery site known in North China.
A preliminary report on the newly found Tianyuan Cave, a Late Pleistocene human fossil site near Zhoukoudian
Haowen Tong,Hong Shang,Shuangquan Zhang,Fuyou Chen
Chinese Science Bulletin , 2004, DOI: 10.1007/BF02889760
Abstract: The Tianyuan Cave is the only human fossil-bearing site containing rich mammalian fossils found in the last decades near Zhoukoudian. Up to now more than 34 specimens of the human body have been recovered, and the mammalian fossils can be put into 29 species. Cervids dominate the fauna, and carnivores are very rare. Based on the primary examination, the human fossils can be attributed to the speciesHomo sapiens. All the mammalian fossils, except one between tooth ofCrocuta belong to the species that still exist today. But some of them are the first records in fossil form north of the Yellow River, such asArctonyx andCapricornis. Based on the mammalian fauna study, it seems that the Tianyuan Cave can be correlated with the Upper Cave. Sixty-three percent of the species of the mammalian fauna from the Tianyuan Cave are also present in the Upper Cave. The characters of the deposits also share some similarities between the Tianyuan Cave and the Upper Cave; both of them are mainly composed of breccia without cement. The dating using the U-series method on deer tooth samples indicates that the geological age of the new site is around 25 thousand years B.P. This is the first discovery of human sites outside the core area of the Peking Man Site at Zhoukoudian, which throws new light onto this world famous site complex.
Pseudospin symmetry in supersymmetric quantum mechanics: II. Spin-orbit effects
Shihang Shen,Haozhao Liang,Pengwei Zhao,Shuangquan Zhang,Jie Meng
Physics , 2013, DOI: 10.1103/PhysRevC.88.024311
Abstract: Following a previous paper [Haozhao Liang \textit{et al.}, Phys. Rev. C \textbf{87}, 014334 (2013)], we discuss the spin-orbit effects on the pseudospin symmetry (PSS) within the framework of supersymmetric quantum mechanics. By using the perturbation theory, we demonstrate that the perturbative nature of PSS maintains when a substantial spin-orbit potential is included. With the explicit PSS-breaking potential, the spin-orbit effects on the pseudospin-orbit splittings are investigated in a quantitative way.
Production of proinflammatory cytokines in the human THP-1 monocyte cell line following induction by Tp0751, a recombinant protein of Treponema pallidum
ShuangQuan Liu,ShiPing Wang,YiMou Wu,FeiJun Zhao,TieBing Zeng,YueJun Zhang,QiuGui Zhang,DongMei Gao
Science China Life Sciences , 2010, DOI: 10.1007/s11427-010-0038-z
Abstract: The tissue destruction characteristic of syphilis infection may be caused by inflammation due to Treponema pallidum and the ensuing immune responses to the pathogen. T. pallidum membrane proteins are thought to be potent inducers of inflammation during the early stages of infection. However, the actual membrane proteins that induce inflammatory cytokine production are not known, nor are the molecular mechanisms responsible for triggering and sustaining the inflammatory cascades. In the present study, Tp0751 recombinant protein from T. pallidum was found to induce the production of proinflammatory cytokines, including TNF-α, IL-1βand IL-6, in a THP-1 human monocyte cell line. The signal transduction pathways involved in the production of these cytokines were then further investigated. No inhibition of TNF-a, IL-1β, or IL-6 production was observed following treatment with the SAPK/JNK specific inhibitor SP600125 or with an ERK inhibitor PD98059. By contrast, anti-TLR2 mAb, anti-CD14 mAb, and the p38 inhibitor SB203580 significantly inhibited the production of all three cytokines. In addition, pyrrolidine dithiocarbamate (PDTC), a specific inhibitor of NF-κB, profoundly inhibited the production of these cytokines. Tp0751 treatment strongly activated NF-κB, as revealed by Western blotting. However, NF-κB translocation was significantly inhibited by treatment with PDTC. These results indicated that TLR2, CD14, MAPKs/p38, and NF-κB might be implicated in the inflammatory reaction caused by T. pallidum infection.
Pseudospin symmetry: Recent progress with supersymmetric quantum mechanics
Haozhao Liang,Jie Meng,Shihang Shen,Nguyen Van Giai,Shuangquan Zhang,Ying Zhang,Pengwei Zhao
Physics , 2013, DOI: 10.1088/1742-6596/533/1/012020
Abstract: It is an interesting and open problem to trace the origin of the pseudospin symmetry in nuclear single-particle spectra and its symmetry breaking mechanism in actual nuclei. In this report, we mainly focus on our recent progress on this topic by combining the similarity renormalization group technique, supersymmetric quantum mechanics, and perturbation theory. We found that it is a promising direction to understand the pseudospin symmetry in a quantitative way.
Geochronology and Nd and Pb isotope characteristics of gabbro dikes in the Luobusha ophiolite, Tibet
Su Zhou,Xuanxue Mo,J. J. Mahoney,Shuangquan Zhang,Tieyjing Guo,Zhidan Zhao
Chinese Science Bulletin , 2002, DOI: 10.1360/02tb9033
Abstract: We report a combined internal and whole-rock Sm-Nd isochron age, and Nd and Pb isotopic data for gabbro dikes of the Luobusha ophiolite in Tibet. The Sm-Nd isochron of data for two whole rocks and plagioclase and clinopyroxene separates from one of the rocks yields a Middle Jurassic age of (177±31) Ma (with an initial εNd(t) = +8), which provides a significant bound on the time of formation of the Luobusha ophiolite. The Nd and Pb isotopic characteristics of the dike indicate an Indian-Ocean-type isotopic affinity, and we conclude that the Luobusha ophiolite formed in an oceanic setting during the Middle Jurassic.
STUDY ON THE KILLING ACTION OF THE ANTIBACTERIAL PEPTIDES ON CANCER CELLS AND THEIR INFLUENCE ON THE ULTRASTRUCTURE
家蚕抗菌肽对癌细胞的杀伤作用及其超微结构的观察

Jia Hongwu,Zhang Shuangquan,Dai Zhuying,
贾红武
,张双全,戴祝英

动物学研究 , 1997,
Abstract: 从家蚕蛹血淋巴中分离纯化的抗菌肽β组分对体外培养的癌细胞有选择性杀伤作用,而对正常人B淋巴细胞无不良影响。抗菌肽与巨噬细胞淋巴瘤细胞U937体外培养一段时间后,用扫描和透射电镜观察细胞膜和细胞器的变化,发现细胞膜和核被膜局部溶解,线粒体肿胀、发空,胞内物质大量外泄,从而导致细胞死亡。
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