薄层色谱法评价不同产地黄根的品质

【目的】建立评价黄根(Prismatomeris connate Y.Z.Ruan)品质的薄层色谱分析方法。【方法】以有效成分甲基异茜草素为指标,以甲苯-乙酸乙酯-甲醇-甲酸(3∶1∶0.2∶0.1)为展开剂,建立黄根的专属性薄层色谱,并评价10个不同产地黄根的品质。【结果】不同产地黄根药材与对照色谱在相应位置上,显示出相同颜色的斑点,且斑点清晰,比移值(Rf)为0.76。【结论】薄层色谱法能够有效对黄根进行鉴别,且该方法简便、准确,具有较好的适应性。     

不同产地青果中没食子酸含量的比较研究

采用高效液相色谱法测定了26批不同产地青果中没食子酸的含量,使用Thermo Hypersil BDS C18高效液相色谱柱,甲醇—0.1%磷酸(5∶95)为流动相,流速1.0 mL/min,检测波长254 nm,柱温30℃.结果表明:不同产地青果中没食子酸的含量存在一定差异,其中,产于四川合江的青果没食子酸含量较高(2.293 mg.g-1),其次是产于福建的青果,其他产地青果中没食子酸含量也均超过了1.0 mg.g-1;同一产地,由于品种和采收期的不同,青果中没食子酸的含量存在一定差异.     

罗汉果甜苷ⅡA的分离鉴定含量测定 及其降糖抗氧化活性研究

为了研究罗汉果中甜苷成分的生物活性及资源含量,为其进一步开发利用提供实验依据,本文通过柱色谱技术,从罗汉果中分离出罗汉果甜苷ⅡA(mogrosideⅡA);利用核磁波谱(NMR),对mogrosideⅡA进行波谱数据归属;通过α-葡萄糖苷酶抑制活性和抗氧化活性测定,探讨罗汉果甜苷降血糖的可能机制;通过高效液相色谱串联质谱(high performance liquid chromatography-mass spectrometry,HPLC-MS)法,分析不同产地罗汉果中mogrosideⅡA的含量。通过研究,本文为mogrosideⅡA提供了完整的尚未见报道的波谱数据;同时,研究结果表明,mogrosideⅡA具有较强α-葡萄糖苷酶抑制活性,其IC_(50)为0.187±0.006 g/L,且呈现出剂量依赖的快速竞争性可逆抑制特点;另外,通过含量分析,发现产自永福县堡里镇的罗汉果中mogrosideⅡA的含量最高。     

不同产地短管兔耳草脂溶性化学成分的GC-MS分析

采用毛细管色谱-质谱联用技术对青海省不同产地短管兔耳草脂溶性化学成分进行了研究,共分离鉴定出40种不同化合物,有11种成分为3个产地所共有.比较发现不同产地短管兔耳草脂溶性化学成分及相对含量存在差异,为该种药材品种及产地的鉴别和品质比较提供了一定依据.     

薄层色谱法评价不同产地解毒草的品质

【目的】建立评价解毒草(Onychiumjaponicum(Thunb.)kunze var.Japonicum)薄层色谱分析方法。【方法】以有效成分菊苣酸为指标,以石油醚-乙酸乙酯-甲酸(3∶6∶1)为展开剂,建立解毒草的专属性薄层色谱,并评价10个不同产地解毒草的品质。【结果】不同产地解毒草药材与对照色谱在相应位置上,显相同颜色的斑点,且斑点清晰,比移值(Rf)为0.66。【结论】薄层色谱法能够有效对解毒草进行鉴别,且该方法简便、准确,具有较好的适应性。     

HPLC测定青海不同海拔野生与栽培羌活中异欧前胡素的含量

目的：采用HPLC同时测定青海不同地区羌活中异欧前胡素的含量,为评价羌活质量及人工种植羌活提供理论依据.方法：色谱柱为Kromasil C18柱;流动相：甲醇-0.1%磷酸（70∶30）;流速：1.0ml/min;检测波长：310nm.结果：不同产地的羌活异欧前胡素含量有差别,同样产于大通的羌活,人工栽培品种的异欧前胡素含量高于野生品种.结论：羌活中异欧前胡素含量与产地生境、栽培技术和羌活本身品种差异有关.     

Determination of Isoimperatorin by HPLC in Notoptergium 1ncisum Colleted from Different Area of Qinghai Province

目的：采用HPLC同时测定青海不同地区羌活中异欧前胡素的含量,为评价羌活质量及人工种植羌活提供理论依据.方法：色谱柱为Kromasil C18柱;流动相：甲醇-0.1%磷酸（70∶30）;流速：1.0ml/min;检测波长：310nm.结果：不同产地的羌活异欧前胡素含量有差别,同样产于大通的羌活,人工栽培品种的异欧前胡素含量高于野生品种.结论：羌活中异欧前胡素含量与产地生境、栽培技术和羌活本身品种差异有关.     

东北三省不同产地龙胆HPLC指纹图谱的研究

建立龙胆HPLC指纹图谱研究方法,对不同产地龙胆的质量进行研究.色谱柱:Spherisorb-C18(4.6mm×250 mm,5μm),水(A)-甲醇(B)进行梯度洗脱;流速为1.0 m L/min;检测波长为270 nm;柱温为30℃;进样量为10μL;检测时间为40 min.结果表明,东北三省不同产地龙胆的指纹图谱没有明显差异,但不同产地的龙胆苦苷的含量存在明显的差异.该色谱条件简单易行,可用于龙胆的鉴别研究.     

广东省15个不同产地五指毛桃药材中补骨脂素含量测定

目的建立五指毛桃药材中补骨脂素的高效液相色谱测定方法,测定广东省15个不同产地五指毛桃药材中补骨脂素含量,了解广东省不同产地五指毛桃药材质量情况。方法采用反相高效液相色谱法测定补骨脂素的含量,WatersC18色谱柱(250mm×4.6mm,5μm),流动相:甲醇-水(60∶40),流速为1.0mL/min,柱温:35℃;检测波长:245nm。结果补骨脂素在9.4～198.5μg/mL范围内,线性关系良好,平均回收率为99.94%,RSD为0.64%。广东省不同产地五指毛桃的补骨脂素含量范围为0.165～1.187mg/g,说明广东省不同产地五指毛桃质量较好。结论五指毛桃药材中补骨脂素的HPLC分析方法结果准确,重现性好,可作为五指毛桃药材的质量评价方法。     

薄层色谱法评价不同产地土茯苓的品质

【目的】建立评价土茯苓(Smilax glabra Roxb.)品质的薄层色谱分析方法。【方法】以有效成分落新妇苷为指标,以氯仿-甲醇-甲酸(4∶1∶0.05)展开系统,建立土茯苓的专属性薄层色谱,并评价10个不同产地土茯苓的品质。【结果】不同产地土茯苓药材在与对照色谱相应位置上,显示出相同颜色的荧光斑点,且斑点清晰,比移值(Rf)为0.41。【结论】薄层色谱法能够有效对土茯苓进行鉴别,且该方法简便、准确,具有较好的适应性。     

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.     

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.     

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.     

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。     

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.