生物碱基及其衍生物的反相离子对色谱行为研究

本文报道了以含７．５％ＣＨ３ＯＨ，１０ｍｍｏｌ．Ｌ，（Ｃ４Ｈ９）４ＮＢｒ，１０ｍｍｏｌ／Ｌ，ＫＨ２ＰＯ４－Ｎａ２ＨＰＯ４缓冲溶液为流动相，在ＹＷＧＣ１８柱上，反相离子对色谱法分离尿嘧啶，胸腺嘧啶，腺嘌呤，可可碱，尿嘧啶丙酸，茶碱，咖啡因等七种碱基及其衍生物，用于药物，软性饮料，茶叶中茶碱和咖啡因的测定，标准加入回收率在９５．５％－１０４．５％之间。     

妊娠血清锌,铜,铁,钙,镁FAAS测定及围产研究

应用火焰原子吸收光谱法（ＦＡＡＳ）直接测定不同妊周孕妇及婴儿脐血血清中微量元素含量，并以标准物牛血清作方法质控，监测结果有效地用于产前干预．在最佳实验条件下，各元素的精密度（ＳＲ）．检出限（ρＤＬ／ｍｇ·Ｌ－１）和标准加入回收率（Ｙ）分别为：Ｚｎ，４．１０％，９５６×１０－３，９９．０％～１０３％；Ｃｕ，３．５０％，０．０３７，９７．０％～１０１％；Ｆｅ，４．２７％，０．０４３，９９．０％～１０３％；Ｃａ，２．２９％，０．０２０，９９．０％～１０１％；Ｍｇ，２．２９％，３．８８×１０－３，９７．０％～１０３％．该方法具有用样量少、简便准确、高精密度等特点．     

在10质量%的乙醇—水混合溶剂中碳酸二级解离热力学研究

在１０质量％的乙醇－水混合物中，在２７８．１５－３１８．１５Ｋ温度范围内，利用电池：Ｐ和０１．３２５ｋＰａ）｜Ｎａ２ＣＯ３（ｍ１），ＮａＨＣＯ３（ｍ２），ＮａＣｌ（ｍ３），１０质量％乙醇－水｜ＡｇＣｌ－Ａｇ的准确电动热数据，确定了在１０％的乙醇－水混合物中碳酸二级解离九Ｋ２。     

嘌呤嘧啶类化合物的反相离子对色谱分离及饮料中咖啡因的测定

本文报道了以含７．５％甲醇（Ｖ／Ｖ），１０ｍｍｏｌ／Ｌ（Ｃ４Ｈ９）４ＮＢｒ，１０ｍｍｏｌ／ＬＫＨ２ＰＯ４～Ｎａ２ＨＰＯ４缓冲溶液（ｐＨ５．０）作流动相，在ＹＷＧＣ１８柱上，反相离子对色谱法同时分离胞嘧啶、黄嘌呤、腺嘌呤、可可碱、尿嘧啶丙酸、茶碱、咖啡因７种碱基及其衍生物的方法，并用于软性饮料中咖啡因的测定，标准加入回收率在９５．３％～１０４．５％之间。     

膦甲酸钠用于肾移植术后巨细胞病毒感染的疗效观察

肾移植术后由于免疫抑制剂的应用，巨细胞病毒（ＣＭＶ）感染较为常见．据报道有５０％～７５％。我院自１９９９年５月至１９９９年１１月对４０名肾移植术后患者采用国产膦甲酸钠治疗肾移植术后ＣＭＶ感染，进行疗效观察，并随访２年，疗效甚佳，现将结果报告如下：一、资料和方法１．临床资料连续选取４０例肾移植术后ＣＭＶ感染者，根据实验室检查及临床症状按同一标准分类，其中活动期２０例，静止期２０例；ＣＭＶ感染活动期有临床症状的１０例，其中试验组５例，对照组５例；无临床症状１０例，其中试验组６例，对照组４例。ＣＭＶ感…     

栉孔扇贝四倍体的研究：I：细胞松驰素B诱导

利用细胞松驰素Ｂ抑制栉孔扇贝Ｃｈｌｌａｍｙｓ（Ａｚｕｍａｐｅｃｔｅｎ）ｆａｒｒｅｒｉ受精卵的第一极体的放出和第一次有丝分裂获得四倍体，在２０℃条件下，卵子受精后１０ｍｉｎ，０．５μｇ／ｍｌ的ＣＢ持续处理１０ｍｉｎ，２０ｍｉｎ抑制第一极体排出，结果三倍体率和四倍体率分别为３８．３８％，３９．７５％和２８．４２％，３０．２４％，在２０℃条件下，卵子受精后１ｈ，０．５μｇ／ｍｌ的ＣＢ持续处理１０，１５，     

秦美猕猴桃的室温贮藏

采用ＰＥ袋和保鲜剂方法对室温下贮藏秦美猕猴桃进行了研究．结果表明，袋内Ｏ２体积分数为１０％以上，ＣＯ２体积分数在２．５％～６％范围情况下，果实呼吸峰的出现推迟，峰值降低，果实贮藏期显著延长．袋内ＣＯ２体积分数高于６％，Ｏ２体积分数低于１０％时，则产生伤害．ＣＯ２体积分数低于２．５％时，贮藏期缩短．适合的ＰＥ－３袋加保鲜剂室温贮藏三个月，其猕猴桃果实硬度可保持在４．１０ｋｇ／ｃｍ２，好果率达９６．４％．     

NaS2O4.10H2O复合相变储冷体系的热力学性质

研究制备相互变温度在５－１０℃之间的新型空调储冷材料。方法测定以Ｎａ２ＳＯ４．１０Ｈ２Ｏ为主要成分的代共熔混合体系的相容温度随组成变化的与方。研究抑制过冷和相分层现象的方法结果由质量分数为８０％的Ｎａ２ＳＯ４．１０Ｈ２Ｏ、２％－８％的ＫＣｌ、５％－１０％ＮＨ４Ｃｌ和１％－５％（ＮＨ４）２ＳＯ４组成的低共水合盐体系的相变温度降至９－１０℃结论加入无机直ＫＣｌ,ＮＨ４Ｃｌ（ＮＨ４）２ＳＯ４或ＮａＣｌ降     

阿霉素的荧光测定研究

提出荧光法测定阿霉素的新方法。阿霉素在硫酸介质中发生脱水反应生成强荧光的脱水物，反应产物荧光强度在７．３×１０＾－１０～２．２×１０＾－８ｍｏｌ／Ｌ浓度范围与阿霉素含量成正比，检出限为２．１×１０＾－１０ｍｏｌ／Ｌ。用于测定血清和尿液中阿霉素的回收率分别为８９％～９５％和９６％～１０１％，体液中常见金属离子，如Ｆｅ＾３＋、Ｃｕ＾２＋、Ｍｇ＾２＋、Ｃａ＾２＋、Ｍｎ＾２＋等，不干扰测定结果。     

冷凝器管用优质不锈钢“FS10”

冷凝器管用优质不锈钢“ＦＳ１０”日本住友金属工业公司最近开发出一种铁素体优质不锈钢ＦＳ１０。该钢被用作电站的冷凝器管材用钢。ＦＳ１０含有２９％Ｃｒ，４％Ｍｎ和２％Ｎｉ，与通常的耐海水不锈钢相比，对海水有更高的抗力。采用ＦＳ１０不锈钢管材代替铜金管材，...     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

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.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

A computer generator for randomly layered structures

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

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

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。     

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.     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to