中国蛙科一新属——肛刺蛙属(蛙科:叉舌蛙亚科)

形态比较和分子系统学分析结果表明叶氏隆肛蛙Feirana yei具有较多独特性.其雄性个体肛部隆起,肛孔下方有两个布满黑刺的大的白色球形隆起、具单咽下内声囊、第一指具婚刺等外形特征可区别于隆肛蛙属已知的另2种和蛙科叉舌蛙亚科中的其他各属;在棘蛙族系统发育关系树上独立为一支,位于Quasipaa支系的基部,与该属其他种明显分开,构成姐妹群关系.这些特性表明叶氏隆肛蛙不宜划入隆肛蛙属或Quasipaa,适宜另立一新属,即肛刺蛙属Yerana gen.nov.     

3种隆肛蛙的核型分析

采用骨髓细胞蒸汽固定法对采自河南的3种隆肛蛙进行核型研究,均为2n=26,NF=52.隆肛蛙(Feirana quadrana)栾川居群Nos.2,3,6为sm,10 p出现次缢痕;太行隆肛蛙(F.taihangnicus)Nos.2,3,4为sm,9p上出现次缢痕;叶氏隆肛蛙(F.yei)Nos.2,3,9为sm,次缢痕位于6 p.3种隆肛蛙核型差异显著.通过比较发现,隆肛蛙不同地理居群的sm数目和顺序、次缢痕的位置有明显差别,出现了明显的遗传分化.     

河南省蛙科一新纪录

章报道采自河南凋在县的一种水蛙属（Hylarana）标本，与河南省已有记录的沼蛙Hylarana(Hylarana)guentheri明显不同，经鉴定为河南省新纪录阔褶水蛙Hylarana(Hylarana)latouchii。     

溴化1-辛基-3-甲基咪唑对太行隆肛蛙蝌蚪的毒性及其红细胞微核与核异常诱导研究

采用急性和亚急性暴露方法,用离子液体溴化1-辛基-3-甲基咪唑对太行隆肛蛙(Feirana taihangnicus)蝌蚪进行染毒,通过微核实验检测离子液体对太行隆肛蛙蝌蚪红细胞微核与核异常的诱导率.实验结果发现,离子液体对太行隆肛蛙蝌蚪的24 h LC50为82.1 mg·L-1,表明该离子液体对太行隆肛蛙蝌蚪具有生...     

北方山溪鲵与隆肛蛙视网膜显微结构的观察比较

为探讨北方山溪鲵和隆肛蛙视网膜结构与生活习性、捕食方式的关系，用光镜观察了这两种动物视网膜的结构，测量各层厚度、3个核层胞核的层数及胞核直径．结果表明，山溪鲵与隆肛蛙视网膜虽然各核层的层数相似，但隆肛蛙的胞核直径明显小于山溪鲵，致使两种动物在3个核层和2个网层的厚度上存在明显差异．从视网膜结构分析其机能，依赖于视觉捕食的隆肛蛙，视网膜具有较高的视敏度；捕食时以嗅觉为主、视觉为辅的山溪鲵，视网膜则具有较高的光敏度．显示了视网膜结构机能与各自的捕食方式的适应性．     

广东省蛙科二新纪录

本文记述了１９８７年在广东省新丰县云髻山和１９９３年在连县大东山采到的蛙科种类中，其中绿臭蛙Ｒａｎａ ｍａｒｇａｒｅｔａｅ和桑植蛙Ｒａｎａ ｓａｎｇｚｈｉｅｎｓｉｓ经鉴定，分别与绿臭蛙及桑植蛙所描述的形态特征核对基本一致，为广东省无尾两栖类两新记录。     

寻找务川臭蛙

务川臭蛙是我国特有的一种喀斯特洞穴蛙类,隶属于无尾目蛙科臭蛙属,学名为Odorraaa wuchuanensis（也有作：Rana wuchuartensis）,别名“蝌蚂”,分布于贵州省务川仡佬族苗族自治县。以往的文献仅记录了其在务川县柏村镇一个洞穴内的分布。务川臭蛙是1979年才被人类发现的罕见的大型蛙类,1983被科学命名。     

太行隆肛蛙营养成分的分析

运用直接干燥法、微量凯氏定氮法、索氏抽提法、灼烧称量法、容量法和钼蓝比色法对产自河南省济源市的10只太行隆肛蛙(Feirana taihangnica)营养成分进行测定分析.结果表明:太行隆肛蛙的水分含量较高,蛋白质、脂肪和灰分含量较低,但含钙量异常丰富,每百克肌肉中含钙490 mg,远远高于其他肉制品和大部分水产品,含磷量也较高.因此,太行隆肛蛙可以作为重要的钙磷补充食物.     

海南分布的粗皮姬蛙蝌蚪的形态特征

2010年8月在海南省海口市市郊稻田采集到一批蝌蚪,其中姬蛙科的蝌蚪经鉴定为粗皮姬蛙,粗皮姬蛙是一种广布于东南亚的物种。对处于36期发育时期的粗皮姬蛙蝌蚪进行了观察、测量和描述,并与文献报道的我国重庆南川、台湾、福建德化以及泰国的蝌蚪进行了比较。结果表明海南的粗皮姬蛙蝌蚪的形态特点是体高大于体宽,尾长为体长的1.7倍;口盘位于吻端部,开口指向身体前部。口唇及周围无边缘乳突和副突;生活时背部和尾基部底色淡黄色或淡黄绿色。比较发现,采自海南省海口市市郊的粗皮姬蛙蝌蚪与泰国的粗皮姬蛙蝌蚪在体型和体色等方面比较相似,而与我国重庆南川、福建德化、台湾的粗皮姬蛙蝌蚪有一定差异。这是首次对粗皮姬蛙蝌蚪描述和测量,为姬蛙属蝌蚪的综合修订和物种分化研究等提供了基本信息;并提示有必要进一步从形态量度和口咽腔内部结构方面对粗皮姬蛙不同分布种群进行研究,揭示这一广布种的形态变异规律。     

山东毛茛属植物的花粉形态研究

利用扫描电子显微镜对山东毛茛属（Ranunculus L．）3种植物的花粉形态进行了观察和研究．结果显示该属花粉为长球形，具3沟，外壁具颗粒状刺雕纹．本属花粉粒形状、大小和外壁雕纹的细微结构可以作为种间分类的依据．     

临汾附近两种蛙类染色体特征研究

本文利用骨髓细胞空气干燥法，对临汾附近两种蛙类染色体组型进行分析．其中中国林蛙(Rana chensinensis)的二倍体染色体数目为2n＝24，包括12个大型染色体(相对长度大于7．0)和12个小型染色体(相对长度小于6，0)．全部染色体可配成12对．黑斑侧褶蛙(Pelophylax nigromaculata)的二部体染色体数目为2m＝26，全部染色体可配成13对，5对大型、8对小型染色体．与北京郊区同种蛙类染色体比较，说明不同地理居群的同种蛙染色体具有丰富的多样性．     

FISH of 5S rDNA and telomeric (TTAGGG) n repeats in normal and translocated populations of the frog Quasipaa boulengeri (Anura, Ranidae)

Quasipaa boulengeri,a spiny frog,is widely distributed in the low mountain regions,around Sichuan Basin.Our previous study revealed five karyotypes,caused by a translocation,that are randomly distributed throughout different populations.5S rDNA and telomere sequence(TTAGGG) n are potential good markers for chromosome identification and karyological evolution.In this study,we examined the sequences of 14 populations using fluorescence in situ hybridization(FISH) to detect if there is any variation between karyologically normal and translocated populations.5S rDNA loci were located at the same position on chromosomes 1 in 7 translocated populations.In two of the seven normal populations,5S rDNA also occurred on chromosome 5 in addition to chromosome 1.Our findings further indicate that the 5S rDNA on No.1 most likely represents the ancestral condition,while the minor loci represent the derived state.Signal density variations of the 5S rDNA were observed beteween homologous chromosomes or sister chromatids of pair 1 in both normal and translocated populations.Telomere sequences were identically located on all ends of the 26 chromosomes in seven rearranged populations,however,no ITSs were observed on the translocated chromosomes 1 and 6.Two of the six normal populations were found to contain ITSs which indicates that populations with translocation events diverged prior to those with ITSs rearrangements.In the KKS and BF populations,the ITSs of chromosome 3 are not always found on both homologues.Inter-chromosomal signal strength of telomeric sequences commonly differs within all populations.     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

Perspherical Approaches for Electrons in Atoms and Charged Excitons in Quantum Wells

Instead of following Fock’s expansion,we solve the Schrodinger equation for some quantum mechanical manybody systems such as electrons in atoms and charged excitons in quantum wells in a similar way in hyperspherical coordinates by expanding the wave functions into orthonormal complete basis sets of the hyperspherical hannonics(HHs)of hyperangles and generalized Laguerre polynomials(GLPs)of the hyperradius.This leads the equation to     

Advances in broadband wireless communications under high-mobility scenarios

Future mobile communication systems aim at providing very high data transmission rates, even in high-mobility scenarios such as high-speed wheel-track trains, maglev trains, highway vehicles, airplanes, guided missiles or spacecraft. A particularly important commercial application is the strong and increasing worldwide demand for high- speed broadband wireless communications （up to 574.8 km/ h test speeds or 380 km/h commercial speeds） in railways, providing data, voice and video services for applications such as onboard entertainment services to passengers, train control, train dispatch, train sensor status handling and sur- veillance. In such high-mobility scenarios, there are a number of communication challenges, including fast hand- over, location updating, high-speed channel modeling, estimation and equalization, anti-Doppler spreading tech- niques, fast power control, and dedicated network architec- ture. Because signal transmission in very high-speed scenarios will inevitably experience serious deterioration, it is imperative to develop key broadband mobile communi- cation techniques for such high-speed vehicles.     

Wuhan University Journal of Natural Sciences TOTAL CONTENTS

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海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。