原子吸收光谱法测定铅钙合金中锑及铜

研究了铅对原子吸收光谱法测定锑及铜的干扰及其消除方法,提出了测定铅钙合金中锑、铜的新方法．测定锑的特征浓度为０．４ｍｇ／Ｌ（１％）,线性浓度范围０～３０ｍｇ／Ｌ;测定铜的特征浓度为０．０３７ｍｇ／Ｌ（１％）,线性浓度范围为０～３ｍｇ／Ｌ;方法简便快速,选择性好,经标样分析表明,结果的准确度及精密度均符合要求．     

红豆杉细胞植板方法的研究

在红豆杉细胞植板中、适宜的培养基是优化的ＭＳ培养基,其中ＮＡＡ浓度为０．５ｍｇ／Ｌ,６ＢＡ浓度为０．５ｍｇ／Ｌ,培养细胞生长周期为４０ｄ;培养在中最优碳源浓度是：蔗糖３０ｇ／Ｌ,葡萄糖１０ｇ／Ｌ,无机盐最佳浓度是：ＮＨ＾＋４１０ｍｍｏｌ／Ｌ,ＮＬ＾－３４０ｍｍｏｌ／Ｌ,ＰＯ＾３－４１．２５ｍｍｏｌ／Ｌ。研究表明,培养基的ｐＨ值与植板率在。氨基酸及维生素等有机成分能明显促进细胞生长。     

两种乳化剂对大鳞副泥鳅(Paramisgurnusdabryanus)胚胎、鱼苗的亚慢性毒性

参照瑞典制订的欧洲国家标准法的鱼类胚胎－鱼苗毒性测定技术,进行了农乳２２０１及吐温－８０两种常用乳化剂对大鳞副泥鳅胚胎－鱼苗阶段毒性实验。结果表明,鱼苗比鱼卵对这两种乳化剂更敏感。农乳２２０１对鱼苗的最低影响浓度（ＬＯＥＣ）为０．１４ｍｇ／Ｌ,最高无影响浓度（ＮＯＥＣ）为０．０７ｍｇ／Ｌ,而吐温－８０则分别为５０、２５ｍｇ／Ｌ．与由经验公式推算的结果相比较,差别比较大。尽管在鱼类毒性试验中通常要求溶剂及乳化剂不得超过０．１ｍｇ／Ｌ,但这个浓度对农乳２２０１来说仍有亚慢性效应。此外,由于浓度的吐温－８０对饥饿状态的鱼苗有延长存活时间作用,故在使用欧洲国家标准法进行试验时,不适合使用这种乳化剂．     

氟离子对声致发光的影响

本研究首次观察到在水溶液中溶解有Ｃｌ＾－,ＮＯ３＾－,Ｆ＾－,ＨＣＯ３＾－和ＳＯ４＾－五种阴离子时,只有Ｆ＾－在浓度高于４．０ｍｇ／Ｌ时会对声致发光产生影响,当在４．０ｍｇ／Ｌ￣２．０ｍｇ／Ｌ范围内改变Ｆ＾－的浓度,声致发光强度随Ｆ＾－浓度的增加而下降,Ｆ＾－的引入使得空化区域的低温等离子体的形成变为可以控制。     

红豆杉细胞植板方法的研究

在红豆杉细胞植板中,适宜的培养基是优化的ＭＳ培养基,其中ＮＡＡ浓度为０．５ｍｇ／Ｌ,６ＢＡ浓度为０．５ｍｇ／Ｌ;培养细胞生长周期约４０ｄ;培养基中最优碳源浓度是：蔗糖３０ｇ／Ｌ、葡萄糖１０ｇ／Ｌ．无机盐最佳浓度是：ＮＨ＋４１０ｍｍｏｌ／Ｌ,ＮＯ－３４０ｍｍｏｌ／Ｌ,ＰＯ３－４１．２５ｍｍｏｌ／Ｌ．研究表明,培养基的ｐＨ值与植板率密切相关．氨基酸及维生素等有机成分能明显促进细胞生长．来自细胞悬浮培养物的条件培养基能显著地促进红豆杉培养细胞的单细胞在低密度植板时的克隆形成     

2,6—二硝基甲苯对鲤鱼的毒性

研究测定了２,６－二硝基甲苯（２,６－ＤＮＴ）对鲤鱼的急性和亚致死毒性．亚致死试验经１８０ｍｇ／Ｌ、３６０ｍｇ／Ｌ、５４０ｍｇ／Ｌ、７２０ｍｇ／Ｌ、９９０ｍｇ／Ｌ２,６－ＤＮＴ暴露２１ｄ．在１５℃～１９℃下,２４ｈ、４８ｈ、７２ｈ、９６ｈ的半致死浓度值分别为２５４８ｍｇ／Ｌ、２２９６ｍｇ／Ｌ、２０１２ｍｇ／Ｌ、１９００ｍｇ／Ｌ．亚致死试验中,根据２,６－ＤＮＴ对鲤鱼生长和肝、肾、鳃ＡＴＰａｓｅ活力的影响,求得２,６－ＤＮＴ的最大允许毒物浓度为１８０～３６０ｍｇ／Ｌ．     

金属离子对葡萄糖氧化酶活性测定的影响

本文研究了一些金属离子对葡萄糖氧化酶测定的影响，指出Ａｇ＋、Ｈｇ２＋具有较强抑制作用，最小抑制浓度分别为５ｕｇ／Ｌ及４ｍｇ／Ｌ，Ｉ５０分别为２０ｕｇ／Ｌ及７．７ｍｇ／Ｌ。     

稀土对八角种子萌发及幼苗生长的生理效应

用０ｍｇ／Ｌ、５０ｍｇ／Ｌ、１００ｍｇ／Ｌ、２００ｍｇ／Ｌ、３００ｍｇ／Ｌ、５００ｍｇ／Ｌ浓度稀土（ＲＥ）处理八角（Ｉｌｌｉｃｉｕｍ ｖｅｒｕｍ Ｈｏｃｋ．ｆ．）种子和幼苗,结果表明：１００ｍｇ／Ｌ浓度ＲＥ增加种子发芽时的根长、芽长、侧根数和提高种子活力指数最显著;２００ｍｇ／Ｌ浓度ＲＥ提高种子发芽率、发芽指数、日平均发芽率和发芽值最显著;３００ｍｇ／Ｌ浓度ＲＥ提高发芽高峰值和降低平均发芽天数最显     

流加葡萄糖对L-天冬酰胺酶发酵的影响及其动力学特性

着重讨论了葡萄糖对Ｌ－天冬酰胺酶发酵过程的影响,并对其发酵动力学特性进行了分析。采用自动流加葡萄糖控制发酵ｐＨ的工艺,可使Ｌ－天冬酰胺酶活力达到６４ｕ／ｍｌ,比添加葡萄糖的摇瓶发酵提高了１４６％。流加葡萄糖控制ｐＨ的Ｌ－天冬酰胺酶发酵是生长相关的;维持２～５ｍｇ／ｍｌ和１．２～１．４ｍｇ／ｍｌ的葡萄糖浓度,可分别使比生长速率和比产酶速率达到０．８１／ｈ和１２００ｕ／ｇ．ｈ。     

流动注射在线光化学荧光法测定扑热息痛

提出测定扑热息痛的流动注射光化学荧光分析的新方法，扑热息痛在ＮａＯＨ碱性介质中，于１５Ｗ紫外杀菌灯的照射下发生光化学反应，所得产物的荧光强度与扑热息痛的浓度在０－１０．０ｍｇ／Ｌ范围内有良好的线性关系，检测限为０．０３ｍｇ／Ｌ。本法可直接用于片剂中扑热息痛的定量分析。     

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