优化板蓝根提取工艺的研究

优化板蓝根提取的最佳工艺的研究。以靛玉红及总氮含量为板蓝根中的有效成分测定指标,采用正交试验对醇提浓度、回流次数、回流时间,加醇倍数等因素进行考察,从而确定最佳工艺;最佳工艺为:用9倍量的60%的乙醇回流提取两次,每次2h。结论:⑴采用此种提取方法不仅能够充分提取板蓝根中的有效成分,减少提取过程中有效成分的破坏,而且工艺稳定性好。     

尿畅舒胶囊提取工艺研究

目的：确定尿畅舒胶囊提取工艺的最佳条件．方法：分别采用正交实验法,以葛根素为评价指标,优选粉葛的醇提工艺条件;以干膏率、总皂苷含量为评价指标,优选黄芪等药材水提工艺条件．结果：粉葛采用加6倍量50％乙醇提取,提取3次,每次提取40分钟;黄芪等药材采用加8倍量水煎煮,煎煮3次,每次煎煮0．5小时．结论：本工艺方法简单,稳定可行,适合工业化生产．     

正交法优选孔枕益智片五味子的提取工艺

目的 优选孔枕益智片中五味子有效成分五味子醇甲提取工艺方法.方法 采用正交设计试验,以HPLC测得五味子醇甲的含量为观察指标对五味子提取工艺进行优化.结果 优选工艺为五味子以8、6、6倍量80%乙醇提取3次,提取时间均为3 h.结论 所选提取工艺稳定、可行.     

正交实验法优选复方烧伤膏的醇提工艺

优选了复方烧伤膏的最佳醇提取工艺.以大黄素提取量、干膏率为评价指标,选择乙醇浓度、乙醇用量、提取时间及提取次数为考察因素,利用L9(34)正交实验确定复方烧伤膏的醇提取工艺.结果:最佳提取工艺为加70％的乙醇8倍量,回流提取3次,1h/次.优选出的提取工艺简单、可行,可作为该制剂合理开发的依据.     

正交试验法优选养心安神颗粒醇提工艺

优选养心安神颗粒的最佳醇提取工艺.采用正交试验法以含五味子醇甲的量、干膏得率为指标,考察乙醇体积分数、溶剂倍数、提取时间和提取次数四因素对醇提工艺的影响.色谱条件:Diamonsil C18色谱柱(5μm,4.6 mm×250 mm);流动相为甲醇-水(55:45);流速1.0 mL/min;柱温30℃.结果确定养心安神颗粒的最佳醇提取工艺为70％的乙醇溶液提取3次(第1次8倍量,第2次6倍量,第3次4倍量),每次2 h.优选的醇提工艺合理,验证了优选醇提工艺的可行性,为养心安神颗粒醇提取工艺的确定提供了实验依据.     

栀子提取工艺的优化

目的：研究栀子中有效成分栀子苷最佳提取条件。方法：以HLPC为含量测定方法，采用重复-正交试验法，以乙醇浓度（A），溶剂量（B），提取时间（C），提取次数（D）4个因素，每个因素选取3个水平进行试验，经工艺验证，最后确定提取工艺。结果：因素A、D对栀子苷含量有显著影响。结论：75％乙醇5倍量，回流提取2次，每次1h，为栀子苷提取最佳条件。     

正交试验法优选穿山龙提取工艺

采用正交试验法优选穿山龙药材醇提的最佳工艺.高效液相色谱法测定穿山龙提取物中含含薯蓣皂苷元的量.优选出穿山龙醇提取的最佳工艺为,65%乙醇体积分数,加醇量分别为8倍和6倍,提取2次,提取时间为1. 5 h和1 h.经验证试验表明该提取工艺稳定可行,且皂苷提取率较高,适合于生产实际,可为穿山龙的下一步制剂生产实践提供理论依据.     

金铃子复方胃漂浮缓释制剂成型前处理研究

目的:通过实验,建立金铃子复方中有效成分延胡索乙素、川楝素HPLC含量测定的方法,对金铃子复方进行提取精制工艺研究,为成型工艺的研究做准备。方法:采用HPLC法对金铃子复方提取液中延胡索乙素、川楝素的含量进行测定,以提取时间、提取次数、乙醇倍数、乙醇浓度为主要考察因素,以延胡索乙素、川楝素的含量为评价指标,通过正交试验设计优选金铃子复方的最佳提取工艺。结果:延胡索的最佳提取工艺为:加14倍70%乙醇回流提取3次,每次提取1 h;川楝子的最佳提取工艺为:加10倍量95%乙醇回流提取3次,每次提取1.5 h。结论:本实验所优选出来的制备工艺合理可行,稳定可靠。     

金线莲多糖提取工艺的研究

以浸膏得率和浸膏中多糖的质量分数综合评价,利用L,9(34)正交实验从水提和醇沉两个方面优选金线莲水溶性多糖最佳提取工艺条件,为金线莲活性多糖的开发利用提供科学依据和实验基础.最佳水提工艺条件为:m(金线莲):v(水)=1:30,回流提取0.5h,提取2次;最佳醇沉工艺条件为:m(生药量):v(水提液)=1g:2ml,溶液中加入已醇,使φ(乙醇)=70%,静置6h.     

枸骨叶中熊果酸的提取工艺研究

研究枸骨叶中熊果酸的最佳提取工艺条件.在单因素试验的基础上,采用正交试验设计法,选择乙醇浓度(A)、固液比(B)、提取时间(C)为因素,每因素各取三水平,按 L9(34)正交表进行实验.结果表明:影响提取效果各因素为乙醇浓度>提取时间>固液比.其最优提取工艺条件为用8.5倍量φ=95%乙醇,于80℃加热回流提取2次,第一次2 h,第二次1.5 h.     

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.     

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.     

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.