小麦中挥发酚的测定

用4-氨基安替比林比色法测定小麦中挥发酚，是目前较为灵敏、选择性高又稳定的比色方法。采用加酸蒸馏法将酚蒸出，蒸馏过程中加硬脂酸，避免泡沫外溢，溜出液用4-氨基安替比林比色法测定。本方法最低检出限为0．5μg。     

毛竹叶化学成分的初步测定

对不同年限毛竹叶的水提取物进行定性的分析，结果表明含有黄酮、糖类、氨基酸和蒽醌类等成分，采用凯氏定氮法、分光光度法对毛竹叶中蛋白质和总糖含量进行了测定，结果（以质量分数计）表明蛋白质平均含量为16.68%，总糖平均含量为24.61%，用硝酸铝－－亚硝酸钠比色法测定总黄酮含量平均为0.86%；福林试剂还原比色法测总酚含量平均为2.74%。     

井冈山马齿苋多糖的体外抗氧化作用及总糖含量测定

目的探讨井冈山马齿苋多糖的体外抗氧化作用并测定其总糖含量。方法应用Fenton法、DPPH法和FRAP法比色法测定,共同评价井冈山马齿苋多糖的抗氧化作用。结果井冈山马齿苋多糖在体外能明显清除羟自由基、DPPH自由基和还原Fe~(3+),并且体外抗氧化作用均随其浓度的增大而增大;苯酚-硫酸比色法测定马齿苋多糖的总糖含量,总糖含量为23.56%。结论井冈山马齿苋多糖具有明显的体外抗氧化作用。     

冬小麦分蘖节入土深度与品种越冬性的相关分析

本试验收集了华北平原,黄河流域、长江流域的小麦品种类型,对冬小麦分蘖节入土深度进行了研究,发现冬小麦分蘖节入土深度与冬小麦品种越冬性有密切相关,分蘖节深度越深,越冬性越好,因而分蘖节入土深度的指标可做为选育强冬性品种的重要指标。     

酶解法预处理杜仲粕壳考察指标的研究

为探讨杜仲粕壳酶解液中总糖含量的测定方法的可行性,将其总糖含量作为酶解率的考察指标,在相同酶解条件下,同一用量的不同种类酶和不同用量的同一种酶分别对杜仲粕壳酶解,采用蒽酮比色法,以供试品空白为参比测定酶解液中总糖的含量.结果表明:在625 nm波长下测得的各酶解液中总糖含量能较好地反应出酶解率的不同,同时酶解液中的酶不会影响蒽酮比色法测定酶解总糖的含量作为酶解率的考察指标.采用差示光度法(△A法)可消除酶解液中干扰测定总糖含量的许多因素,方法简单,结果准确,可为研究酶解法预处理样品原料的酶解率提供一种可行的考察指标.     

比色法快速测定糖化酶活力的新方法

本文介绍了比色法测定糖化酶活力新方法。糖化酶水解淀粉产生葡萄糖，生成的葡萄８糖与３，５－二硝基水杨酸钠盐（ＤＮＳ）作用，发生颜色改变，颜色变化的多少与葡萄糖含量成正比。因此糖化酶水解液与ＤＮＳ反应后，在５５０ｎｍ处测定吸光度，由吸光度看出葡萄糖含量，并计算出糖化酶的活力。比色法简单、快速、准确度和标准法相当，是仪器分析测定糖化酶活力的理想方法。     

洋葱块茎中还原糖测定方法对比研究

本文采用DNS比色法、还原糖测定仪两种方法对洋葱块茎中的还原糖含量进行测定。结果表明,还原糖测定仪法的标准偏差和变异系数均小于DNS法,其回收率为101.7%。     

溶剂型涂料甲醛测定中干扰溶剂的探讨

对溶剂型涂料甲醛测定的酚试剂（MBTH）比色法、乙酰丙酮比色法中干扰溶剂进行探讨。选定六种可疑干扰溶剂乙醛、乙醇、异丁醛、异丁醇、正丁醇和甲基异丁基甲酮为研究对象,发现在乙酰丙酮比色法中异丁醇、乙醛对测定有较大干扰,其它四种溶剂干扰很小;在酚试剂比色法中六种溶剂对测定干扰都很小。用GC—MS直接测定溶剂型涂料中甲醛含量方法可对比色法结果进行确认。     

小麦矮秆性的早期诊断法

当前许多国家都进行大量工作来培育秆矮不倒伏,产量高,抗病虫的新品种。但直到目前为止,为测定小麦品种和杂种的株高,在大田和实验室条件下都还是在直接用尺测量茎基到穗顶的长度,但这就要等植物抽穗后才能测量,而测定植株数多时要花费大量人力和物力。为此曾探讨了小麦器官发生第二阶段早期诊断小麦矮秆性的方法。找出与小麦株高相关的性状,从多年对小麦器官发生的观察表明,由种粒到分蘖节之间的地下节间长度就属此种性状。这就有可能制定和提出根据地下节间长度对株高作早期诊断的新方法。     

辽宁东部山区几种野果化学成分的初步分析与研究

章采用721分光光度计法、蒽酮比色法、化学滴定法等方法对5种常见野果的水分含量、有机酸酸度、可溶性糖含量、色素及维生素C含量进行测定和分析，为更深入地研究山区野果资源提供理论依据，从而为山区经济振兴服务．     

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