RP-HPLC法测定清喉咽糖浆的黄芩苷含量

目的 建立反相高效液相方法测定清喉咽糖浆中黄芩苷的含量.方法 SPD-10AVP岛津HPLC色谱仪,LC-ATVP紫外检测器,色谱柱C1s柱(4.6mm×200mm,5 μm),柱温为25°C,流速为1 mL·min-1,检测波长为280 nm,以甲醇-0.4%磷酸溶液(50:50)为流动相.结果 平均回收率为99.55%,RSD%=1.04%,黄芩苷在在12.1～108.9 μg·mL-1范围内线性回归方程为:Y=63.35+20565.67X,r=0.9999.结论 该方法简便、准确,专属性强,测定结果重复性好,为清喉咽糖浆中黄芩苷的定量分析提供了科学有效的方法.     

HPLC同时测定明目上清片中盐酸小檗碱和黄芩苷的含量

目的:建立同时测定明目上清片中盐酸小檗碱和黄芩苷含量的高效液相色谱方法。方法:Agilent Zorbax Exlipse XDB-C18柱(4.6 mm×250 mm,5μm);柱温为25℃;流动相为甲醇-0.2%磷酸水溶液(45∶55);流速为1.0 mL.min-1;检测波长为265 nm。结果:盐酸小檗碱在1.02~20.40μg.mL-1内线性关系良好(r=0.999 9);黄芩苷在4.54~90.80μg.mL-1内线性关系良好(r=0.999 8);盐酸小檗碱、黄芩苷平均加样回收率为99.2%,101.2%,RSD分别为1.1%和1.6%。结论:本方法简便、准确,重现性好,可用于本制剂的质量控制。     

消石利胆丸中黄芩苷的含量测定

目的:探索消石利胆丸中黄芩苷的定量方法.方法:采用络合物萃取-紫外分光光度法测定消石利胆丸中黄芩苷的含量.结果:络合物最大吸收波长为262nm±1nm,回归方程为X=2.016×101A+6.482×103(r=0.9999,n=7),线性范围0~180g;平均回收率98.96%,RSD=1.75%(n=5);精密度RSD=1.24%(n=5);稳定性RSD=1.61%(n=5),络合物在2h内稳定.结论:本法简便、准确,可排除共存物干扰,适于消石利胆丸中黄芩苷的含量测定.     

黄芩愈伤组织的诱导培养及其黄芩苷的含量测定

试验首次建立了黄芩愈伤组织中黄芩苷的测定方法,并对黄芩愈伤组织生长和黄芩苷生成的稳定性进行了初步研究.采用高效液相色谱法测定愈伤组织中黄芩苷的含量,色谱条件为:色谱柱为ODS-C18柱,流动相:水-甲醇-磷酸(47∶53∶0.2),流速为1 mL/m in,检测波长为280 nm,室温.结果表明:黄芩苷在2.6μg/mL~120μg/mL范围内线形关系良好(r=0.9994),平均回收率为99.74%,RSD为0.85%,该方法具有简便、快速、稳定性好,可用于愈伤组织中黄芩苷的含量测定.     

HPLC法同时测定清心明目上清片中栀子苷、连翘苷、黄芩苷和盐酸小檗碱的含量

目的:建立HPLC同时测定清心明目上清片中四种成分(栀子苷、连翘苷、黄芩苷和盐酸小檗碱)含量的方法.方法:色谱柱.AglientTC-C18(4.6mm×250mm,5μm),流动相为乙腈(A)-0.2%磷酸溶液(B),梯度洗脱程序依次为.0~10 min 18%B,10~12 min 20%~30%B,12~14 min30%~16%B,14~20 min 16%~28%B,20~30 min 28%~65%B,30~40 min 65%~80%B,流速0.9 mL·min-1,柱温为25℃,检测波长分别为238 nm(栀子苷和连翘苷)、275nm(黄芩苷和盐酸小檗碱).结果:栀子苷、连翘苷、黄芩苷和盐酸小檗碱分别在0.031 1~0.622 2μg(r=0.999 6),0.533 3~8.000μg(r=0.999 6),0.080 0~1.600 0μg(r=0.999 5),0.115 6~1.155 6μg(r=0.999 4)范围内线性关系良好,平均加样回收率分别为98.4%、98.3%、97.1%、98.2%.结论:本法操作简便、精密度高、重现性好,适用于同时测定清心明目上清片中栀子苷、连翘苷、黄芩苷和盐酸小檗碱的含量.     

银黄含化片中黄芩苷含量测定方法的研究

目的 :探索银黄含化片中黄芩苷的含量测定方法。方法 :以水加热溶提黄芩苷 ,定量加入硫酸铜、溴化十六烷基三甲铵、氨水溶液形成络合物 ,正丁醇萃取络合物 ,用紫外分光光度法测定含量。结果 :络合物最大吸收波长为 2 6 2± 1nm,回归方程为 A=5 .36 8X-1.5 74× 10 -2 ,r=0 .9996 ,n=7,线性范围 0～ 18μg/m L;精密度 RSD=0 .81% ,n=5 ;稳定性 RSD=1.48% ,2小时内稳定 ;平均回收率 99.43% ,RSD=1.6 5 % ,n=5。结论 :本法简便、准确 ,可排除共存物干扰 ,适于银黄含化片中黄芩苷的含量测定     

清热解毒片质量标准研究

采用薄层色谱法对清热解毒片中的金银花、栀子及连翘进行定性鉴别,采用高效液相色谱法测定黄芩中的黄芩苷含量.色谱柱为C18柱(4.6mm×250mm,5μm),流动相为甲醇-0.2%磷酸水溶液(50:50),检测波长276nm.鉴别项下薄层图斑点清晰,阴性对照无干扰,专属性强;黄芩苷含量测定方法在进样浓度30.6～81.6μg/ml内呈良好的线性关系,r=0.9999,回收率为99.34%,RSD=1.83%.本方法简便准确,重现性好,可用于清热解毒片的质量标准.     

HPLC法测定银黄口服液中黄芩苷的含量

采用效液相色谱法,色谱柱为Kromasil 100-5 ODS2 C18(5μm,250 mm×4.6 mm),柱温为室温,流动为相甲醇-水-0.1 mol/L磷酸(45.0∶55.0∶0.2),流速为1 mL/min,检测波长为280 nm,建立了银黄口服液中黄岑苷的含量测定方法.在上述条件下,黄芩苷在0.002 72μg·mL-1~0.054 40 mg·mL-1(r=0.999 1)范围内具有良好的线性关系,平均回收率为100.07%,RSD=1.13%.该法简单、准确且快速,可作为银黄口服液中黄芩苷的含量测定方法.     

复方珍珠暗疮胶囊中黄芩苷含量测定

建立了HPLC法测定复方珍珠暗疮胶囊中黄芩的有效成分黄芩苷含量的方法.采用C18柱,流速1 mL/min、流动相水相（取庚烷磺酸钠0.40 g,磷酸二氢钠3.90 g,加水溶解并稀释至1 000 mL）-甲醇（56：44）,用冰乙酸调pH至3.40;检测波长275 nm.结果表明：黄芩苷在0.49-5.88μg线性关系良好,相关系数为0.999 7,回收率为99.32%,RSD为0.9%（n=6）.该法适用于复方珍珠暗疮胶囊中黄芩苷的含量测定.     

液相色谱法同时测定芩连片中芍药苷、黄芩苷、盐酸巴马汀和盐酸小檗碱的含量

研究并建立了液相色谱法同时测定芩连片中芍药苷、黄芩苷、盐酸巴马汀和盐酸小檗碱含量的新方法.实验条件为Agilent ZorbaxSB—C_(18)柱(250 mm×4.6 mm,5μm),乙腈-0.05%磷酸溶液.梯度洗脱.检测波长为0～8.5 min 230 nm,8.5～23 min 280 nm和23～30 min 346nm.流速1.0 mL/min.芍药苷、黄芩苷、盐酸巴马汀和盐酸小檗碱线性范围分别为3.87～38.72 mg/L、4.18～41.80 mg/L、1.62～16.20 mg/L、2.10～21.00mg/L.应用该法测定芩连片中芍药苷、黄芩苷、盐酸巴马汀和盐酸小檗碱含量.加样回收率分别为100.9%(RSD=2.7%),101.5%(RSD=0.7%),97.9%(RSD=2.0%)和102.2% (RSD=1.6%).     

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.     

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。     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

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.