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《Cell research》2005,15(11):978-986
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(Summary)The content of this paper includes the following 5 parts:Ⅰ.Palaeoloxodon namadicus namadi(typicus)MatsumotoⅡ.Palaeolokodon namadicus naumanni(Makiyama)Ⅲ.Palaeoloxodon namadicus yabei?MatsumotoⅣ.Discussion on the systematic classification of P.namadicus and some otherPleistocene elephants of chinaⅤ.Conclusion  相似文献   

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In the newer concept of the anatomical divisions of the lungs, the bronchopulmonary segment is the primary unit. Specific lung areas are identified by their relationship to the branch of the bronchus that serves them. The left upper lobe apical segment, for example, is that which is supplied by the left upper lobe apical bronchus. The boundaries of the segments are definitive; thin tissue surrounds each segment.Some diseases of the lungs tend to progress only “through channels”—reaching a segment via the specific airway serving it, and then frequently remaining within the segmental boundaries.The concept is of particular importance to surgeons because of the trend toward segmental resection and salvage of vital lung tissue. In addition, a more definitive nomenclature, useful to surgeons, internists, radiologists and bronchoscopists in designating the location of a lesion or a foreign body, is possible.  相似文献   

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The present paper deals with the Cyprinoid fishes of the genus Gymnocypris col-lected during May to October, 1961, from Gyantse (江孜) and Shigatse (日喀则) insouthern Tibet. Altogether 9 species are presented in this paper, including 4 new speciesand 1 new subspecies. The type specimens are kept in the Institute of Zoology, Acade-mia Sinica, Peking. 1. Gymnocypris molicorporus sp. nov. (Figs. 2—5) 8 specimens, Nos. TS-043, 048, 051, 064, 069, 070, 371, 372, from Bedei (白地)of Nagartse (浪卡子) (Yamdrok Tso 羊卓雍湖). Total length 265—308mm, standard  相似文献   

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ThreespecieshavebeenreferredtoShantungosuchustodate.ThetypespeciesS.chuhsienensis(Young,1961)isrepresentedbyanarticulatedskeletonpreservedasanimpressionofitsventralsurface.S.hangjinensiswasrecentlydescribedbyWuetal.(1994)onthebasisofanincompleteskull(withthemandible)andthepartofthepostcranialskeleton.ThethirdspeciesisS.brachycephalus,whichwillberestudiedinthepresentpaper'sbrachycephaluswaserectedbyYoungforaspecimen,consistingofpartialskullandsomepostcranialelements(V4020).Itwaspublishedinon…  相似文献   

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The Holarctic erigonid genus Zornella has been surveyed. Four spedes are recognized in this genus, two Palaearctic: Z. aultrigera (L. Koch, 11879) & Z. orientalis sp. nov., and two Nearcfic: Z. arrnata (Banks, 1906) & Z. ayptodon Chamherlin, 1920. It is demouslrated that neither nearcfic species is agnspedtic with Z. atltrigera as was thought by Holm and other authors. Z. sp. nov. is describcd from northeastern Siberia. All of the species are illustrated and their distributions mapped.  相似文献   

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Hexavalent chromium is a contaminant highly mobile in the environment that is toxic for plants at low concentrations. In this work, the physiological response of Convolvulus arvensis and Medicago truncatula plants to Cr(VI) treatments was compared. C. arvensis is a potential Cr hyperaccumulator well adapted to semiarid conditions that biotransform Cr(VI) to the less toxic Cr(III). M. truncatula is a model plant well adapted to semiarid conditions with a well studied genetic response to heavy metal stress. The results demonstrated that C. arvensis is more tolerant to Cr toxicity and has a higher Cr translocation to the leaves. The inductively coupled plasma optical emission spectroscopy results showed that C. arvensis plants treated with 10 mg Cr(VI) L–1 accumulated 1512, 210, and 131 mg Cr kg–1 in roots, stems, and leaves, respectively. While M. truncatula plants treated with the same Cr(VI) concentration accumulated 1081, 331, and 44 (mg Cr kg–1) in roots, stems, and leaves, respectively. Enzymatic assays demonstrated that Cr(VI) decreased ascorbate peroxidase activity and increased catalase activity in M. truncatula, while an opposite response was found in C. arvensis. The x-ray absorption spectroscopy studies showed that both plant species reduced Cr(VI) to the less toxic Cr(III).  相似文献   

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记述下盾螨属Hypoaspis Canestrini,1885的1新亚种,柔弱下盾螨宁夏亚种Hypoaspis debilis ningxiaensis Bai,ssp.nov.和龚氏钝革螨Amblygamasus gongzhengdai Bai,2010后若螨形态,标本分别采自银川市南郊地表柳叶腐植层及银川花卉市场的高山榕盆景土壤表层.模式标本保存于军事医学科学院微生物流行病研究所昆虫标本馆和宁夏回族自治区疾病预防控制中心.  相似文献   

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CLASSIFICATION OF PANTOLAMBDODONTIDAE (PANTODONTA,MAMMALIA)   总被引:2,自引:2,他引:0  
l.Weoriea1revlewl)PaatolambdodontidaeFossilsfoundbytheAsianExpeditionofAmericanMuseumofNaturalHistoryinSharaMurunarea,NeiMongolinl925andl928forthefirsttimeweredescribedbyGrangerandGregory(l934)asnewgenusandspe-cies,PantolambdodoninermisandP.lortis,andforwhichanewfamily,Pantola-mbdodontidae,wascreatedatthesametime.Inl978Tongdescribedafragmentary1owerjawwithm2andtrigonidofm3fromtheLatePaleoceneTaizicunFormation,Xinjiangandestablishedanewgenusandspecies,Dilambdaspeciosa.InthesameyearCho…  相似文献   

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A series of cycloSal-BVDUMP phosphate triesters has been prepared. The prototype compound was 3-methyl-cycloSal-BVDUMP 2. Furthermore, a series of 3′-O-acyl-modified derivatives having carboxylic acids with different lipophilicity or a L-configurated α-amino acid (phenylalanine) was prepared. The hydrolysis properties in phosphate buffer PBS as well as in PBS containing pig liver esterase (PLE) will be described. Finally, the biological activity against EBV has been determined.  相似文献   

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The micronucleus test is a reliable short-term in vivo test for detectingpotential clastogens or spindle poisons.Using the micronucleus test to evaluatethe mutagenic effect of N, N'-Dimcthyl formamide(DMF)on bonemarrow polychromatic erythrocytes,Kunming strain mice were treated withthe drug in single and multiple injection tests.  相似文献   

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In the present paper, five new species and two new subspecies of Chinesebutterflies belonging to 4 families and 6 genera are described. The butterflies here dealt with were collected by Chinese entomologistsduring their expeditions of the forest pests and diseases of Yunnan province inthe years 1979-1981.  相似文献   

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THE STATUS OF MUSK-DEER FROM ANHUI PROVINCE,CHINA   总被引:1,自引:0,他引:1  
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This new genus is related to Arggrogramma Hubner and Acanthoplusia Dufy,but differs from them in the following characters: the stigma below the cell offore--wing stripe-shaped, long or short, white or grey, but never Y- or U-shapedand silvery, the valvae of male genitalia long and dilated at apex, and without  相似文献   

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DESCRIPTION OF A KUBANOCHOERUS SKULL FROM TONGXIN, NINGXIA   总被引:1,自引:1,他引:0  
<正> A rich Middle Miocene mammalian fauna was discovered in a gully named Maerzuizi Gou, Tongxin County, Ningxia Hui Autonomous Region, in the winter of 1985. Among the fossils is a well preserved skull evidently belonging to Kubanochoerus. It is the third and, as far as we know, the best preserved of its kind so far in the world. A careful study of the skull has enabled us not only to review all the fossils previously discovered and assigned either to Listriodon or to Bunolistriodon in China, but also to clarify in certain degree the evolutionary trend and the classification of that particular group.  相似文献   

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This paper presents a new subspecies of Botoid fishes, collected from Langao in Shaanxi province, China, in June, 1979. Leptbotia tientaiensis hansuiensis, subsp, nov. Diagnosis. closely resembling Leptobotia tientaiensis tientaiensis (Wu) and Leptobotia tientaiensis compressicauda (Nichols), but distinguishable by characters as given in the following table.  相似文献   

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Axenic culture of Ochromonas danica from the Protozoology Laboratoryof Peking University was used for this study.In proteose peptone-glucosemedium containing lppm.selenium(in the form of Na_2SeO_3),Ochromonas  相似文献   

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