磺胺类药物鉴定的研究 Ⅱ化学定性分析反应的实验

磺胺类药物用作化学治疗剂在医学上已得到非常广泛的应用。它们的鉴定方法一般是应用沉淀反应,颜色反应、显微结晶分析和高温分解法等。早年前有人曾对某些磺胺类药物如磺胺吡啶、磺胺嘧啶、磺胺甲噻唑,磺胺噻唑、对氨基苯磺酰胺,对氨基苯乙酰磺酰胺(磺胺醋酰)及双磺胺等的化学定性分析反应进行了一些研究。但由于上述磺胺类药物大部分已被这些新磺胺类药物所代替,故对这些新的已在临床上广泛应用的磺胺类药物的定性分析反应进行研究是具有一定的实际应用价值的。故本文是继续前文的研究、对17种磺胺类的12个化学定性分析反应进行了试验。这些分析反应操作非常简便,而且所用试剂除β-萘酚外,又均为一般性常用的无机试剂。如将显微结晶法,各磺胺的熔点以及上述分析反应三者联合应用于磺胺类药物的鉴定,则其分析效果和正确性可有所提高。     

中草药研究中应注意的几个问题

分析了当前在中草药化学研究中存在的几个问题，提出了中草药化学研究应注重中草药活性成分、化学成分与药性关系及整体性、系统性研究的观点。     

中草药去屑防脱发香波的研制

采用中草药提取液为疗效剂，丝肽液为营养剂，以去头屑防脱发护理香波为研究对象，对中草药提取液的配方选择、制备工艺、方法以及香波的主要原料、添加剂及工艺作了研究。     

19种中草药美白及抗氧化活性的比较

以无水乙醇和水作为萃取剂超声提取19种中草药,采用紫外-可见分光光度法测试各中草药提取液对酪氨酸酶和DPPH·、·OH、·O-23种自由基的抑制率及半数抑制浓度IC50.结果表明,茯苓、黄芩、红景天、赤芍、人参、白蔹均表现出较强的酪氨酸酶抑制活性,其中茯苓对酪氨酸酶的抑制能力最强.红景天、黄芩、白芍、赤芍的综合抗氧化活性强于其他中草药.     

超分子固砂剂QH的抑砂性能试验评价

超分子固砂剂QH是使用超分子化学技术合成的一种固砂剂。通过室内试验研究石英砂粒径、含油量、温度、处理量及冲砂排量对QH抑砂能力的影响,评价了其抑砂能力,研究结果表明超分子固砂剂QH是一种高性能的化学固砂剂。     

超临界萃取技术在中草药研究中的应用

综述了超临界流体萃取技术在提取中草药的有效成分、重金属离子、去毒灭菌和去除中草药中的农药等方面的应用以及压力、温度、提携剂、原料颗粒等因素对超临界萃取过程的影响。     

化学抑尘剂的研究现状及进展评价

简要介绍了抑尘剂的3种作用机理,即润湿、固结和凝并。在查阅大量国内外相关文献的基础上,列举并评价了近年来国内外在润湿型、粘结型、凝聚型、复合型、生态环保型及特殊型化学抑尘剂方面的研究成果,表明:化学抑尘剂中出现了磁化表面活性剂、低玻璃化温度等一些新的特性;所用原料对环保要求不断提高;新出现的生态环保型抑尘剂引起了科研工作者极大的兴趣和关注;研究人员正在不断挖掘废料或企业尾料在化学抑尘剂制备中的应用。     

三种抗癌中草药单一提剂及其组合剂抑瘤率比较研究

探讨并比较了苦参、半枝莲、白花蛇舌草的单一提剂水/醇提物及其组合剂对人结肠癌细胞株SW620生长的抑制作用.通过体外培养SW620细胞,加入终浓度分别为1、3、5mg.mL-1的单一提剂及其组合剂,采用MTT法测定药物对SW620的增殖抑制率(IR).结果表明单一提剂对SW620体外增殖均有抑制作用,且呈浓度剂量依赖性;中草药醇提剂抑瘤作用均强于水提剂.组合剂中,除半枝莲与白花蛇舌草水提组合剂比单一提剂作用弱外,其余组合剂均强于单一提剂的抑瘤率,且呈浓度剂量依赖性;中草药醇提液组合剂抑瘤作用均强于水提液.说明苦参、半枝莲、白花蛇舌草水/醇提取物对SW620细胞的生长均有抑制作用,醇提剂抗肿瘤有效成分多于水提剂;三种中草药组合剂抗肿瘤效果优于单一提剂(除半枝莲与白花蛇舌草水提组合剂外).     

半夏-丙酮-MnSO_4-KBrO_3-H_2SO_4体系的振荡行为研究

利用半夏-丙酮-MnSO4-KBrO3-H2SO4化学振荡体系对中草药半夏的化学振荡行为进行了研究,探讨了半夏的质量、粒度及振荡体系的酸度、温度、搅拌速度等因素对振荡反应的影响.同时,分析了半夏-丙酮-MnSO4-KBrO3-H2SO4化学振荡体系中丙酮和KBrO3的作用,推测了半夏参与化学振荡的可能机理.     

从五十种药用植物筛选胰蛋白酶抑制剂

胰蛋白酶抑制剂的生理作用,除保护生物体的一些组织不被胰蛋白酶水解外,对生物的受精~(1)、胚胎的发育~(2)、血液的凝固及抗凝固~(3)都有密切的关系。近年来已发表了胰蛋白酶抑制剂对多种疾病的影响~(4)及其在动物实验和临床治疗研究方面的综合报导~(5)。胰蛋白酶抑制剂作为药物应用有着广阔的前景。目前,对来源于动物的胰蛋白酶抑制剂的研究比植物的多且详细,但其含量极微。植物来源的胰蛋白酶抑制剂的研究也多限于豆科植物的种子。中国医药学是一个伟大的宝库,中草药的种类繁多、来源丰富。本研究的目的是从中草药筛选和提取胰蛋白酶抑制剂,研究其理化性质及生理活性,从而说明其药理作用。本文报导了从五十种药用植物筛选出入种含有胰蛋白酶抑制剂的物质,为今后的进一步研究打下基础。     

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.     

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.     

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。     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

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

正~~