新型树脂对内毒素吸附的体外研究

目的探讨新型吸附树脂(EHC-I)对内毒素(ET)吸附性能的研究。方法采用静态吸附实验检测水及血浆内毒素下降率,将内毒素分别加到水及血浆中配制一定浓度的内毒素溶液,树脂与血浆及树脂与水按比例混合,置37℃恒温水浴按一定速度连续震荡2 h,采用动态浊度法在630 nm处测定震荡前、后内毒素水平,然后计算吸附率。同时做溶血实验以检测树脂的生物相容性。结果内毒素水溶液的下降率为94.86%,内毒素血浆溶液的下降率为89.06%,溶血实验显示溶血率为2.86%。结论新型树脂对内毒素有明显吸附效果,溶血率符合要求,为研制适用于临床的高效清除内毒素的血液灌流器提供了依据。     

大孔吸附树脂对苦参碱的吸附分离研究

研究7种大孔吸附树脂对苦参碱的吸附能力,其中SP825吸附量最大,静态吸附容量为706.19 mg/g;NKA-9次之,600.77mg/g;D301R最小,461.48mg/g.选择了SP825树脂用作提取分离苦参碱.较高的溶液浓度较低的树脂层高度有利于增大树脂的吸附速度,选用对被提取物溶解度大的无水乙醇作洗脱剂,可以加快洗脱速度.     

壳聚糖对胆红素吸附性能的研究

以具有良好生物相容性的壳聚糖为吸附剂,研究了温度、pH值、人血清白蛋白和NaCl对壳聚糖吸附胆红素性能的影响。研究结果表明,人血清白蛋白和NaCl对壳聚糖吸附胆红素有抑制作用;在一定温度范围内,升高温度可提高壳聚糖吸附胆红素的吸附率和吸附速率;在接近人体血液pH值的条件下,壳聚糖对胆红素有良好的吸附性能。     

桑葚花色苷提取工艺优化及抗氧化活性研究

通过单因素和正交试验探讨桑葚花色苷的最佳提取工艺条件,同时比较了大孔树脂纯化前后桑葚花色苷的抗氧化活性变化情况.结果表明,桑葚花色苷提取最佳条件为:70%甲醇、料液比1∶55(g/m L)、提取时间60 min,该条件下提取率为6. 497%.采用静态吸附的方法,通过6种不同型号大孔吸附树脂吸附和解析效率的比较,确定了NKA-9型大孔树脂为桑葚花色苷的最佳纯化树脂.桑葚花色苷有较强的抗氧化活性,且纯化后的桑葚花色苷抗氧化效果显著提高.     

血液灌流吸附对犬内毒素血症模型的实验观察

目的本实验运用内毒素吸附柱,对比格犬内毒素血症模型进行灌流吸附作用,探讨其在犬体内吸附内毒素的有效性和安全性。方法静脉输注LPS(内毒素)复制犬内毒素血症模型,随机分为治疗组和对照组。治疗组采用血液灌流机配合内毒素吸附柱进行灌流吸附治疗,对照组采用不含内毒素吸附剂的空柱。分别选取多个时间点,采血测定犬相关的生理生化指标和内毒素含量。结果安全性检测:治疗组犬的体温持续下降,对照组犬的体温先升后降。与对照组比较,治疗组犬体温在灌流吸附90 min、120 min时,有显著性差异(P<0.05)。与对照组相比,治疗组犬在心率、血常规、血清总蛋白和血清白蛋白、电解质含量、凝血酶原时间、部分活化凝血酶原时间、血清补体C3浓度及纤维蛋白酶含量等生理指标,均未见显著性差异(P>0.05)。吸附效率检测:测定内毒素过滤柱灌流吸附60 min、90 min1、20 min三个时间段内毒素含量,治疗组犬血清中内毒素降低的程度与对照组相比,具有极显著差异(P<0.01)。结论内毒素吸附柱具有较好的血液相容性,具有吸附血清中内毒素的作用,可降低血清中内毒素水平。     

几种类风湿关节炎吸附剂的制备及吸附性能比较

制备了5种不同的类风湿关节炎吸附剂.用它们与类风湿关节炎病人血清作静态吸附实验,EL ISA检测吸附前后血清中RF s的浓度变化.实验发现,以纤维素球为载体,环氧氯丙烷活化后固定苯丙氨酸为配基的吸附剂综合吸附效果最好.该吸附剂对病人血清中IgGRF,IgM RF,IgARF的吸附中分别为39.3%,56.0%,28.1%.血液相容性实验结果显示,该吸附剂的血液相容性良好,能够满足临床应用要求.本文还研究了手臂对吸附剂吸附性能的影响,静态吸附实验结果显示PEG 4000为手臂的吸附剂吸附性能要高于以1,4-丁二醇二缩水甘油醚为手臂的吸附剂.     

大孔吸附树脂分离提取大叶钩藤总生物碱

选择6种大孔吸附树脂(AB-8,NKA-9,NKA-Ⅱ,DA-201,D-101,D 001)分离提取大叶钩藤(Uncar iam acrophy llaW all.)中的总生物碱,考察大孔吸附树脂对大叶钩藤总生物碱的吸附能力。结果筛选出D-101的吸附效果最好,静态吸附容量为112.5m g/m l,动态吸附容量为82.7 m g/m l,选用D-101大孔吸附树脂能很好地提取分离大叶钩藤总生物碱。提取大叶钩藤总生物碱时,用8倍树脂体积的0.08m ol/L盐酸作洗脱剂,成本低、总生物碱洗脱完全,工艺稳定性试验产品含量达36.7%。     

大孔树脂纯化天麻多糖的工艺研究

本研究以炮制的干天麻为原料,水提醇沉法提取多糖,大孔吸附树脂纯化,比较了八种大孔树脂(AB-8、D101、LX-17、D301、NKA-9、S-8、LSD-001、ADS-7)对天麻多糖静态吸附-解析效果,筛选出最佳纯化树脂,再研究最佳树脂纯化天麻多糖工艺参数.结果为:八种大孔吸附树脂中D101对天麻多糖的纯化效果最好.样品液浓度、温度、上样速度,洗脱用乙醇浓度、洗脱流速及洗脱体积等因素均对D101树脂吸附分离天麻多糖有影响.所得的最佳纯化工艺为:20℃是较适宜的吸附温度,上样速度1BV/h,上样浓度4mg/mL,进行吸附;吸附饱和平衡后,用解析液浓度60%乙醇,解析速率2BV/h,解析液体积3BV进行动态洗脱.通过该工艺天麻多糖的纯度提高到了65.7%,表明了大孔树脂D101对天麻多糖具有较好的纯化效果.     

大孔吸附树脂分离纯化大黄蒽醌类物质

考察了大黄蒽醌在5种大孔树脂上的静态吸附过程,筛选出效果最佳的树脂(AB-8).研究了大黄蒽醌在AB-8树脂上的动态吸附特性,并确定分离大黄蒽醌的适宜工艺条件.结果表明:AB-8树脂对大黄蒽醌的静态吸附平衡时间为4 h;20℃时吸附过程可用Langmuir吸附等温方程来描述,吸附溶液的适宜pH值为6.0.确定树脂柱的较佳操作条件为:流速1.0 mL.min-1,大黄蒽醌浓度0.001 3 mg.mL-1.     

大孔吸附树脂分离纯化柚皮总黄酮的研究

通过研究大孔吸附树脂分离纯化柚皮总黄酮的工艺,为柚皮总黄酮的工业化生产提供实验依据。本文以广东产柚皮为原料,以柚皮总黄酮含量及回收率等为考察指标,选用大孔吸附树脂对柚皮总黄酮进行分离纯化,分别采用静态试验、动态试验等分别考察大孔树脂对柚皮总黄酮的分离纯化效果及影响因素。结果表明,D101型大孔吸附树脂对柚皮总黄酮静态饱和比吸附量为63.76mg.g-1(干树脂),洗脱率99.37%,纯度在51.56%以上,是实验树脂中分离纯化柚皮总黄酮的最佳大孔吸附树脂。因此采用本法分离纯化柚皮总黄酮是稳定、高效的,可进一步推广应用于工业化生产。     

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