龙血竭缓释滴丸的制备工艺研究

通过固体分散技术,以硬脂酸为骨架材料,以聚乙二醇-4000为致孔剂,通过选用适当的药物与基质比,制得具有良好缓释效果的龙血竭缓释滴丸.最佳滴丸成型工艺为:载药量为20%,PEG-4000/波洛沙姆=1∶1,硬脂酸用量占辅料量20%;药液温度90℃,滴速为20滴/min,滴距为3 cm,冷凝液温度11~15℃.结果表明该制剂有明显的缓释作用,且制备的缓释滴丸硬度、圆整度和重量差异均符合要求.     

吡嘧磺隆分子印迹聚合物的合成及吸附性能研究

以吡嘧磺隆为模板分子，α-甲基丙烯酸为功能单体，偶氮二异丁腈为引发剂，三甲氧基丙烷三甲基丙烯酸酯为交联剂，合成了吡嘧磺隆分子印迹聚合物；并比较了3种不同致孔剂和致孔剂体积对所合成的聚合物吸附量和颗粒度的影响。结果表明，采用二氯甲烷为致孔剂制备的吡嘧磺隆印迹聚合物的吸附量均高于采用正己烷和正己烷/二氯甲烷（体积比为1∶1）为致孔剂的，致孔剂的用量对聚合物吸附量的影响不明显，但对聚合物的粒径影响比较明显；以36mL二氯甲烷为致孔剂制备的聚合物的颗粒度最大，D₅₀为5.36μm相似文献   

吡嘧磺隆分子印迹聚合物的合成及吸附性能研究

以吡嘧磺隆为模板分子,α-甲基丙烯酸为功能单体,偶氮二异丁腈为引发剂,三甲氧基丙烷三甲基丙烯酸酯为交联剂,合成了吡嘧磺隆分子印迹聚合物;并比较了3种不同致孔剂和致孔剂体积对所合成的聚合物吸附量和颗粒度的影响。结果表明,采用二氯甲烷为致孔剂制备的吡嘧磺隆印迹聚合物的吸附量均高于采用正己烷和正己烷/二氯甲烷(体积比为1∶1)为致孔剂的,致孔剂的用量对聚合物吸附量的影响不明显,但对聚合物的粒径影响比较明显;以36 mL二氯甲烷为致孔剂制备的聚合物的颗粒度最大,D50为5.36μm,吸附量为3321.29μg/g。对该聚合物进行扫描电镜、红外光谱表征及选择性吸附实验,结果表明该聚合物形成了明显的印迹位点,且对吡嘧磺隆、苄嘧磺隆、苯磺隆、甲磺隆和烟嘧磺隆的吸附量分别为1146.19、1044.21、1087.27、1051.92和1023.89μg/g,其中对吡嘧磺隆的吸附量最高。     

竹炭-有机复合吸附剂对Cu2＋吸附行为研究

研究了竹炭及其改性体粒径、用量、吸附时间、温度及铜离子（Cu2＋）初始浓度等因素对Cu2＋吸附效果的影响。结果表明：竹炭及其改性体对Cu＊吸附率随粒径减小而增大，用量增加而增大；Cu2＋初始浓度增大，吸附率减小；对Cu2＋吸附平衡约2h；最佳吸附温度为20-40℃，pH为3—4。改性体2效果最佳，30-50目粒径时去除率达99％以上，当溶液浓度为1．26g／L时，其比吸附量最大，为95．8mg／g。     

以聚乙二醇为软模板制备微孔-介孔硅铝分子筛及其催化性能

以硅铝溶胶前驱体， 与聚乙二醇软模板剂混合， 水热处理后制备微孔-介孔硅铝分子筛. 采用X射线衍射（XRD）、 Fourier变换红外光谱（FT-IR）、 N₂吸附-脱附、 透射电镜（TEM）和氨气程序升温脱附（NH₃-TPD）表征微孔\|介孔硅铝分子筛的理化性质. 将所得微孔-介孔硅铝分子筛作为苯酚叔丁醇烷基化反应的催化剂， 利用苯酚的转化率测试材料的催化性能. 结果表明: 聚乙二醇作为软模板产生介孔结构， 且聚乙二醇加入量可影响硅铝分子筛的结晶度;   当聚乙二醇的加入量不同时， 苯酚的转化率受影响； 当聚乙二醇用量为8 g时， 苯酚转化率最高， 可达95.5%.      

改性β–环糊精对酸化后桉木预水解液中木素的吸附

以β–环糊精(β-CD)为原料、环氧氯丙烷为交联剂、碳酸钙为致孔剂合成β–环糊精–环氧氯丙烷交联物(β-CDP)、碳酸钙致孔β-CDP(Ca-β-CDP),并用红外光谱对其进行表征.以这两种交联产物作为吸附剂对酸化后的桉木预水解液(PHL1)进行木素吸附实验,采用单因素实验分别考察吸附剂用量、吸附时间、吸附温度和吸附pH对木素吸附的影响,确定最佳吸附条件为:β-CDP用量12%(相对于PHL1质量)、吸附时间60,min、吸附温度30,℃、吸附pH为2.0,在此条件下木素最大去除率为57.9%;Ca-β-CDP用量为14%、吸附时间60,min、吸附温度30,℃、吸附pH 2.0,在此条件下木素最大去除率为55.4%.     

D101大孔树脂对羟基钴胺素吸附性质的研究

利用D101大孔吸附树脂对羟基钴胺素的吸附与洗脱性能进行了研究．通过紫外分光光度计和高效液相色谱检测其浓度：树脂静态饱和吸附量为25．31mg／g湿树脂,动态泄漏吸附量为6．22mg／g湿树脂．此外,还考察了洗脱剂乙醇的浓度对于解吸的影响,确定60％的乙醇溶液可以达到最佳的洗脱效果．     

壳聚糖对甲醇吸附及脱附性能的研究

以致孔剂聚乙二醇为添加剂,制备出一种具有微孔结构的颗粒状壳聚糖吸附剂,并研究了其对甲醇的吸附及脱附性能．结果表明,这种具有微孔结构的壳聚糖颗粒对甲醇具有很强的吸附能力,在室温（３１ ℃） 下,其饱和吸附量达１ ７９０ ｍｇ／ｇ ．同时,它在一定时间内能将甲醇大部分脱附．显示利用壳聚糖制作甲醇吸附剂的潜在应用前景     

多孔聚(丙烯酰胺-co-丙烯酸)微球的制备及对亚甲基蓝的吸附性能

以丙烯酰胺(AM)和丙烯酸(AA)为单体、聚乙二醇(PEG-4000)为造孔剂,通过聚合致分相过程在不同单体质量比下制备多孔p(AM-co-AA)微球(PPMS),并用NaOH溶液对其改性,将其用于亚甲基蓝(MB)的吸附。采用红外光谱(FT-IR)和扫描电子显微镜(SEM)对制备的PPMS进行分析,考察了单体中AA用量、吸附温度、pH和MB初始浓度等因素与吸附量的关系。结果表明,随着单体中AA质量分数的提高,微球的孔结构逐渐减少,AA质量分数为单体的50%时,观察不到微球的孔结构。当AA质量分数为单体的20%、pH为8、溶液温度为25℃时,制备的微球对MB的吸附性能最好,且高于不加AA时制得的多孔PAM微球的吸附量。吸附等温线符合Langmuir吸附等温模型,PPMS对MB的最大吸附量为2.565 g/g。PPMS吸附后在甲醇溶液中脱附再吸附、循环5次后,吸附量维持在最高值的96%以上。     

薄荷油香精缓释聚乳酸多孔微球的制备探究

以聚乳酸为壁材,碳酸氢铵为致孔剂,采用双乳液溶剂挥发法,制备出了0.5-1μm的大孔聚乳酸微球,通过扫描电子显微镜对微球的形貌进行了表征,广泛探讨了不同制备条件对聚乳酸微球的影响.并对多孔微球吸附薄荷油香精缓释进行了研究.     

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.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

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.     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

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。     

Quantitative trait loci （QTLs） for quality traits related to protein and starch in wheat

Quality traits in wheat （Triticum aestirum L.） were studied by quantitative trait locus （QTL） analysis in a recombinant inbred line （RIL） population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross （ChSh）. Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.     

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.