RHEOLOGICAL OBSERVATION ONCEREBRO-SPINAL FLUID

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NEW DISCOVERY OF YUNNANOLEPIDS- HETEROYUN-NANOLEPIS QUJINCENSIS (GEN. ET SP. NOV.)

Thenewformdiffersfromtlieotheryunnanolepidsinthefollowingcharacteristics:1)orbitalfenestrabiggerandinamoreanteriorposition;2)possessingpreorbitalrecess(prh)insteadofpreorbitaldepression;3)infraorbitalsensorycanalpassingthroughpostmarginalplate;supraorbitalsensorycanalonpost-pinealplate;4)posteriorinternaltransversecrestinamoreposteriorposition.Onthebasisofcharactersofthenewgenus,thefollowingconcludingremarksarepreliminarygiven:1)Thepreorbitaldepressioninyunnanolepidsisprobab1ynothomologouswith…     

THE ENAMEL ULTRASTRUCTURE IN GIGANTOPITHECUS BLACKI FROM GUANGXI, CHINA

RecentlyanalysisoftheenamelprismpatterninanumberofNeogenehominoidsdocumentedthatdistinctdifferencesbetweenthevariantsofPatternⅢprismdoexistandseemtobeusedasataxonomicindicator(Gantt,1982,1983).However,becauseofinadequatesamplingandp0orlyunderstoodprocessesattheu1trastructural1evel,thevalue0fsuchstudieshastogainuniversalacceptabilityfordeterminingrelati0nshipinaconsistentandsystematic1nanner.Thereis0bviouslyconsiderablepotentia1interestinthestudyofename1prismpatternsandenamelmicr0structureinf…     

ZHAOTONGASPIS JANVIERI GEN.ET SP.NOV.,A GALEASPID FROM EARLY DEVONIAN OF ZHAOTONG,NORTHEASTERN YUNNAN

ThefirstearlyvertebratedescribedfromtheDevonianofZhaotong,northeast-ernYunnan(Fig.i),wasthegaleaspidSanqiaspiszhaotongensis(Liu,i975).Thefish-b6aringhorizonwasthoughttobelongtothe"CuifengshanFormation",thatis,Pragianinage,incomparisonwiththetypelocalityofthisformationintheQujingdistrict,Yunnan.Liaoctal.(l978)consideredthatitwouldbemoreappro-priatetonametheh0riz0nasthePosongchongFormation,sinceithasthesamelitho1ogyandfaunaastheP0s0ngchongFormationintheWenshandistrict,Yunnan.Thissuggesti0…     

tPA Involvement in Ovulation──Studies on Mechanism of Ovulation：Role of Tissue Type Plasminogen Activator

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贵州两栖类新纪录及蛙属一新种

贵州两栖类动物过去曾有过调查,但局限于少数地区。为此,我们从1974年到1979年进行了比较全面的调查,其范围包括贵定、龙里、惠水、平塘、德江、江口、松桃、赤水、仁怀、湄潭、绥阳、遵义、务川、金沙、正安、雷山、榕江、从江、毕节、威宁、望谟、册亨、兴义及荔波等24县,获得两类动物标本一万二千余号,共计有50种(包括亚种),隶属于2目10科16属,其中有一新种及6种贵州新纪录,后者为: 1.黄斑小鲵Hynobius flavomaculatus Fei et Ye(绥阳) 2.大绿蛙Rana livida(Blyth)(江口) 3.棘胸蛙Rana spinosa David(江口、松桃、贵定、龙里、雷山及望谟)     

小鼠F9畸胎癌细胞对维生素A酸诱导反应的差异性

在癌变理论中一般有遗传的和非遗传的两种观点,后者认为正常细胞转变为癌细胞时其基因组并没有发生不可逆的改变,而仅仅是有了基因表达调节的异常。持非遗传观点者因而把肿瘤看作是一类细胞分化的疾病,而恶性畸胎瘤便是一个典型的例子。小鼠畸胎瘤是一种由各种胚层组织组成的、生长缓慢的良性肿瘤,恶性畸胎瘤(又名畸胎癌)也有各种分化组织,但生长极快,主要由于存在着恶性繁殖的干细胞。这种恶性干细胞的形态结构、     

西峡首家奇石店

在西峡县城礼堂街有两间门店,这里洁净优雅,摆放着五颜六色的奇石珠宝,有的像地形地貌,有的似飞禽走兽,有的如树纹、荷叶……,极大地吸引着酷爱奇石的青年、文人和地质工作者,这就是主人吴虹卫新开的奇石店,也有人称之为“奇矿吉石馆”。吴虹卫从小就爱玩石,上小学时捡到的一块奇石,藏于家中后丢失,他至今仍在遗憾,上中学时特别偏爱学习那变化奇妙的物理、化学,后来他投身于煤田学院攻读地矿专业。１９８８年毕业后自谋职业。拜矿物学教授康明为师。在奇石中,他尤以矿物标本中蕴藏的晶体宝石为终生追求。他在几年间,跑遍了全…     

The IUBMB-endorsed transporter classification system

We here describe the transporter classification (TC) system that provides a rational means of classifying all transmembrane transport systems found in living organisms. The availability of this system provides a framework for the use of bioinformatic technologies to answer fundamental questions about the functions, mechanisms, and evolutionary pathways taken for the appearance of these systems. Such advances are discussed.     

Ethics committee recommendations for laboratory animals in private research in France

Complementary to existing legislation, non-public research companies in France have been working together voluntarily within an organization known as Grice (Interprofessional Working Group on Ethics Committees for Laboratory Animals/Groupe de Réflexion Interprofessionnel sur les Comites d'Ethique appliquée à l'animal de laboratoire) with the objective of creating institutional ethics committees in an effort to promote animal welfare and good scientific procedures. Each company's commitment to the creation of these committees has been expressed by signing the Charter. Each ethics committee is composed of at least three members, including one who is not a scientist; a veterinarian is highly desirable. The committee examines all procedures and protocols involving animals and hands down a favourable or unfavourable opinion, or requests improvements, especially concerning animal well-being. Consensual approval of the protocol is an essential requirement before the purchase or allocation of animals. The committee examines every aspect of laboratory animal housing and care, and inspects all temporary or permanent animal housing facilities. Grice will continue its efforts in relation with public research organizations as well as with groups and in other countries whose objectives are in line with its own.