Identification of Phase and Sex-related ISSR Markers of Red Alga Gracilaria lemaneiformis

Six ISSR primers are employed to display the polymorphism of different phases and sexes of red alga Gracilaria lemaneiformis, and two of them, P1 and P3, amplified distinct band patterns. The ISSR pattern amplified by primer P1 of the female gametophyte is identical to that of tetrasporophyte, but distinct from that of male gametophyte. Of the bands produced by primer P3, one is specific to female gametophyte. Three morphologically similar fronds can be easily identified using ISSR technique. Two specific markers, SM1 and SF3, related to male gametophyte and female gametophyte, are cloned and sequenced. The homologous sequences of SM1 are found to encode a hypothetical protein. There is no homologous sequence of SF3 that can be found in GenBank.     

Magneto-induced Line Broadening of Magneto-sensitive Lines in Solar Magnetized Atmospheres

We analyze the spectral line broadening of those magneto-sensitive lines in solar magnetized atmospheres. The broadening at the line wings is due to the increase of the effective width of energy levels involved in Zeeman splitting, and the broadening at the line core also originated in Zeeman splitting under the condition that the Zeeman components are mixed. Therefore, the magnetoinduced or Zeeman broadening take effects on the whole line. The observed Stokes parameter data in a sunspot and outside it acquired by Solar Stokes Spectrum Telescope (S3T) are analyzed for the demonstration of this mechanism, and the Zeeman broadening rates are calculated for FeI6302.5 under some assumptions. Our result shows that the broadening is increased as the magnetic field strength becomes stronger, but the rate of increase at the line core is decreased as the field strength increases, while the rate at the wing does not show such an obvious regularity. The broadening is more effective in the line core than in the wings.     

会计电算化在测绘单位管理中的组织与实施

会计基础工作是财会工作的基本环节 ,是经济管理的重要基础。实现会计电算化对于加强会计基础工作 ,保证财会工作科学有效地进行 ,减少工作误差 ,实现会计工作现代化操作及现代化管理具有现实意义     

The excitation mechanism of the interstellar 6.7 GHz methanol maser

We notice that the second kind of astronomical methanol maser with strong emission always coexists at both 6.7 GHz and 12.2 GHz and in association with compact H II regions and we are led to propose a new excitation mechanism —maser amplification of the 6.7 GHz maser wothout population inversion. We show that this mechanism is compatible with the astronomical conditions and that it and other mechanisms are not mutually exclusive, rather it may serve as a useful complement.     

原华北地台早前寒武纪演化的巨旋回

导言原华北地台分布于东经105°以东,北纬30°—40°之间。东南部中、晚元古范围比黄汲清中朝准地台向南延伸稍远,包括淮阳地区以南部分在内(图1)。五十年代开始区域地质调查,七十年代早期在野外认识基础上,作了区域性归纳(程等,1973,1982a,1982b),此外,对矿物相、变质相系、混合岩、花岗岩(程、张,1982;董申保,1982),矿物对的地温地压(张,1981:靳是琴等;1982),氧同位素研究(崔等,1980)。为进一步     

Existence of periodically invariant curves in 3-dimensional measure-preserving mappings

With the aid of a normal form of a family of measure-preserving mappings in dimension 3, which is deduced in this paper, we prove that there are periodically invariant curves which survive the nonlinear perturbations in the generic case.     

记黄海、渤海海底发现的原始牛新亚种

本文记述的渤海,黄海海底发现的原始牛角心化石(3件),根据形态特征将其定名为Bos primigenius dalianensis subsp.nov.(原始牛大连亚种)。时代屆新生代第四纪晚更新世。这是我国首次于海底发现的原始牛化石。它的发现为探讨晚更新世时期黄海、渤海古地理环境,古气候条件,海水进退,冰期与间冰期的更替,哺乳动物的演化和迁徙提供了新的资料。     

北祁连中西段与超基性岩有关的金矿化特征及成因探讨

北祁连中西段发育三套早古生代蛇绿岩及相应的基性、超基性岩,呈北、中、南三条带状分布。区内金的活化、迁移主要受控于超基性岩带和与其分布近于一致的两条韧性剪切带,金矿化主要发生在强蚀变超基性岩体内、岩体与围岩接触带、断裂破碎蚀变带内。根据包裹体测温及成分测定、稳定同位素特征资料及超基性岩中金丰度值等分析,金矿物质主要来自超基性岩,流体来源于深部,其成因属与超基性岩有关的韧性剪切带型金矿床。     

Geminga脉冲星的COS-B和HEAO-B卫星资料分析

本文利用COS-B和HEAO-B卫星资料对Geminga脉冲星进行了守时性分析和谱分析,结果进一步证实了Geminga脉冲星是一颗具有强γ辐射,弱X辐射的γ射线脉冲星.