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| 1 | ^(207)Pb/^(206)Pb Zircon Dating of the Huangtuling Hypersthene-Garnet-Biotite Gneiss from the Dabie Mountains, Luotian County, Hubei Province, China: New Evidence for Early Precambrian Evolution显示文摘The Huangtuling hypersthene-garnet-biotite gneiss at Luotian County, Hubei Provine, is a typicalgranulite-facies rock of the Dabie Group Complex in the Dabie orogenic belt. Investigations on the morphology andoccurrence of zircons and their internal structures shown in the thin sections lead to the recognition of three types ofzircons, which are in good agreement with the types identified on the basis of morphology, colour and external fea-tures from the related zircon concentrates. The observation of zircons in the rock reveals that part of type 1 zirconsshow signs of a double-layered structure. The interval part existed in the protolith prior to the granulite-facies meta-morphism. Type 2, the prismatic zircons which mainly occur in garnet and hypersthene are metamorphic minerals ofthe granulite-facies metamorphism. Type 3, the round multifaceted zircons in felsic minerals and biotite, are proba-bly attributed to a later geological event related to migmatization. The 207Pb/206Pb zircon dating by direct evaporationon (thermal evaporation ion mass spectrometer) yields ages ranging from 2814 Ma to 1992 Ma. The age discrepancyamong these different zircon types is conspicuous. The yellow-brown(type 1) zircons give ages of 2814±29 Ma to2527±6 Ma, the prismatic euhedral zircons (type 2), 2456±7 Ma to 2254±4 Ma, and the round multifaceted zircons(type 3), 1992±10 Ma. The results are geologically interpreted in consideration of the complicated behaviours of zir-cons during Precambrian geological evolution of the Dabie area. (1) If the protolith of the gneiss is a sedimentaryrock, then type 1 zircons are clastic ones and the ages 2814±29 Ma and 2811±27 Ma may reflect the minimum age ofthe rocks of its source region. also the first geological event in the area. Sedimentation of the protolith occurred be-tween 2814 Ma and 2527 Ma, probably close to 2814 Ma. If the protolith is a volcanic rock, then the formation age ofthe supracrustal rocks of the Dabie Group Complex is around 2814 Ma. The age 2456±7 Ma reflects the time whenthe granulite-facies metamorphism took place. The later migmatization event is dated at aboat 1992±10 Ma, and isprobably the latest early Precambrian event in the area. The present work provides geochronological evidence for the existence of the Dabie Archaean craton, whichhad probably experienced 3 or 4 geological events during its early Precambrian evolution. | JIAN Ping YANG Weiran and ZHANG Zichao Institute of Geology,CAGS,26 Baiwanzhuang Rd, Beijing 100037 China University of Geosciences, Wuhan, Hubei 430074 Yichang Institute of Geology and Mineral Resources, CAGS, Yichang, Hubei 443003 | 1999 | Acta Geologica Sinica(English Edition)1999，73，1： | 12 |
| 2 | Interaction between antigen presenting cells and autoreactive T cells derived from BXSB mice with murine lupus显示文摘全身的豺狼座 erythematosus (SLE ) 是包含多重系统和机关的典型自体免疫病。宽大的证据建议反应 T 房间玩的那辆汽车在这自体免疫的混乱的发展的一个枢轴的角色。这研究被承担调查在介绍房间(APC ) 和反应 T 房间(ATL1 ) 克隆从豺狼座容易的 BXSB 老鼠获得了的一辆汽车的抗原之间的相互作用的机制。ATL1 房间,在 gamma 光线照耀前后的任何一个,能激活天真的 B 房间,由 B 细胞增殖试金决定了。巨噬细胞 fromBXSB 老鼠能刺激在一个应答者 / 激发器(R/S ) 放松 ATL1 房间的增长 1/2.5 的比率。树枝状的房间(DC ) 是为 aper 房间基础上的 ATL1 房间的更强大的激发器。刺激巨噬细胞的能力的 T 房间和 B 房间,然而并非 DC,对 gamma 光线敏感照耀。对老鼠 MHC-II 和 CD4 的 Monoclonal 能堵住 ATL1 增长的调停 DC 的刺激,显示在 ATL1 andAPCs 之间的血缘的识别。我们的数据建议包含巨噬细胞, B 房间和 autoreactiveT 房间的积极反馈环可以在保留导致自体免疫病的自体免疫的回答的动量起一个枢轴的作用。 | Peng Yang Bo Li Ping Lv Yan Zhang Xiao-Ming Gao, Department of Immunology, Peking University Health Science Center, Peking University, 38 Xueyuan Rd, Beijing 100083, China | 2007 | Cell Research2007，17，6： | 2 |
| 3 | A novel LS-SVM hyper-parameter selection based on particle swarm optimization显示文摘 | Guo X C Yang J H Wu C G et rd | 2008 | Neurocomputing2008，71，1618： | 1 |
| 4 | Allele-specific expression of a variant-specific surface protein (VSP) of Giardia lamblia 显示文摘 | Yang Y Adam RD | 1994 | Nuel Acid Res1994，22，： | 1 |
| 5 | Heparan sulfate proteoglycans and heparanase--partners in osteolytic tumer growth and metastasis 显示文摘 | Sanderson RD Yang Y Suva LJ | 2004 | Matrix Biol2004，23，6： | 1 |
| 6 | Neuronal differentiation of embryonic mid- brain cells by upregulation of peroxisome proliferator-activated receptor-gamma via the JNK-dependent pathway 显示文摘 | Park KS Lee RD Kang SK Han SY Park KL Yang KH | 2004 | Exp Cell Res2004，297，2： | 1 |
| 7 | Enzymatic remodeling of heparan sulfate proteoglycans within the tumor microenvironment:growth regulation and the prospect of new cancer therapies显示文摘 | Sanderson RD Yang Y Kelly T | 2005 | J Cell Biochem2005，96，5： | 1 |
| 8 | Noninvasive moniIJ- ring of traunlatic brain injury and post-traumatic' rehabiJitati~m with laser-induced tholoacoustic imaging 显示文摘 | YANG Sihua XIN( l)a I AO Yeqi et rd | 2007 | Applied PhysicsLetters2007，90，24： | 1 |
| 9 | Antioxidation of human low density lipoprotein by unconjugated and conjugated bilirubins显示文摘 | Wu TW Fung KP Wu J Yang CC Weisel RD | 1996 | Biochem Pharmacol1996，51，： | 1 |
| 10 | Role of the p21 cyclin-dependent kinase inhibitor intimal cell proliferation in response to arterial injury显示文摘 | Yang ZY Simari RD Perkins ND | 1996 | Proc Natl Acad Sci USA1996，93，： | 1 |
| 11 | Heparan sulfate proteoglycans and heparanase-partners in osteolytic tumor growth and metastasis显示文摘 | Sanderson RD Yang Y Suva LJ | 2004 | Matrix Biol2004，23，6： | 1 |
| 12 | Hemodilution during cardiopulmonary bypass increases cerebral infarct volume after middle cerebral artery occlusion in rats显示文摘 | Homi HM Yang H Pearlstein RD | 2004 | Anesth Analg2004，99，4： | 1 |
| 13 | Familial aggregation of lung cancer in a high incidence area in China显示文摘 | Jin YT Xu YC Yang RD | | 0，，： | 1 |
| 14 | Perforating garteries to the basal ganglia and brainstem显示文摘 | Yasargil MG Smith RD Yang PH | 1994 | Microneurosurgery1994，1，： | 1 |
| 15 | Biocompa/ibility evaluation of chi-tosan-based injectable hydrogels for th(~ culturing mice mesenchymal slem cells in vilro 显示文摘 | Yah J Yang L Wang G el rd | 2010 | Biomater Appl2010，24，7： | 1 |
| 16 | Neuronal differentiation of embryonic midbrain cells by upregulation of peroxisome proliferator-activated receptor-gamma via the JNK-dependent pathway显示文摘 | Park KS Lee RD Kang SK Han SY Park KL Yang KH | 2004 | Exp Cell Res2004，297，2： | 1 |
| 17 | Role of P21 Cyelin - dependent kinase inhibitor in limiting intimal cell proliferation in response to arterial injury显示文摘 | Yang ZY Siari RD Perkins ND | 1996 | Proc Natl Acad Sci USA1996，93，： | 1 |
| 18 | A half-log increase in BCR- ABL RNA predicts a higher risk of relapse in patients with chronic myeloid leukemia with an imatinib-induced complete cytogenetic re- sponse显示文摘 | Press RD Galderisi C Yang R | 2007 | Clin Cancer Res2007，13，： | 1 |
| 19 | Role of the p21 eyclin-dependent kinase in limiting intimal cell proliferation in response to arterial injury显示文摘 | Yang ZY Simari RD Perkins ND | 1996 | Proc Nail Acad Sei USA1996，93，15： | 1 |
| 20 | Role of the p21 cyclin - dependent kinase inhibitor intimal cell proliferation in response to arterial injury显示文摘 | Yang ZY Simari RD Perkins ND | 1996 | Proc Natl Acad Sci USA1996，93，： | 1 |
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