蒙药材多叶棘豆中总黄酮的提取及含量测定

本实验采用超声波乙醇浸提法从多叶棘豆中提取总黄酮,并用分光光度法测定其含量．实验结果表明,用80％的乙醇浸泡24h,超声50min,可得到较多含量的黄酮,且测得总黄酮含量为2．506mg／g,回收率为99．696．     

多叶棘豆提取总黄酮的微型实验

采用微型实验方法从多叶棘豆中提取总黄酮。用分光光度法测定含量,总黄酮含量为1．912％、回收率为100．1％．通过微型法与常规法比较,微型实验具有试剂用量少,时间短,效率高等优点。是一种值得推广的实验方法．     

正交设计研究蒙药多叶棘豆总黄酮提取工艺

为多叶棘豆总黄酮提取工艺提供依据，采用正交设计优选了其最佳参数，结果表明，最佳提取工艺组为A2B2C2,即加药材8倍量的755乙醇，回流提取2次，每次1h。     

青海省三种常见棘豆主要营养成分研究

采用标准方法对青海省的甘肃棘豆,黄豆棘豆和宽苞棘豆风干样的主要营养成分进行了测定,结果为：甘肃棘豆,粗蛋白１２．６％,粗脂肪１．８％,粗纤维１６．７％,无氮浸出物５３．２％,粗灰分９．４％,钙０．８５％,磷０．２２％,黄花棘豆：粗蛋白１５．２％,粗脂肪１．３％,粗纤维１９％,无氮浸出物４８．３％,粗灰分９．７％,钙０．８０％,磷０．１４％,宽苞棘豆：粗蛋白１３．４％,粗脂肪１．６％,粗纤维１８．７     

肝片形吸虫成虫及虫卵的扫描电镜观察

本文应用扫描电镜系统观察了肝片形吸虫的体表结构和虫卵.1.在口腔内壁上密市有细绒毛,其间还有很多小孔.2.肝片形吸虫的体棘在头锥部份排列整齐而有规则,共有60圈,每圈60～70个.在腹吸盘以后的体棘则规律不明显.3.本文将观察到的不同形态的体棘,按其发育过程分为初生期,早期,中期及后期体棘四类,它们的末端都呈锯齿状.体棘窝较浅.因此体棘较易脱落.4.在张开的生殖腔中,同时观察到了雌雄生殖系统的2个开口,并对伸出体外的阴茎进行了描述.5.肝片形吸虫卵的表面光滑,但在其外膜脱落后则有散在性的小凹陷;卵盖与卵壳连接处虽不很整齐,但并不呈锯齿状.约60%的虫卵后端也具有小结节.     

双棘黄姑鱼人工繁育群体遗传多样性的RAPD分析

采用22个随机引物对双棘黄姑鱼人工繁育群体的遗传多样性水平进行随机扩增多态DNA（RAPD）分析，共检测出248个位点，其中有104个多态位点，平均多态位点百分率P为41．9％；其个体间的平均遗传距离L为0．0657，平均相似系数S为0．9343，Shannon遗传多样性指数H0为0．2829．通过与其他一些鱼类的RAPD研究结果进行对比，对双棘黄姑鱼人工繁育群体的遗传多样性水平进行了分析评估,文中同时就人工繁育及鱼类种质资源的可持续利用问题进行了初步讨论．     

卵形半肠吸虫成虫、童虫与虫卵扫描电镜观察

报道了用扫描电镜观察卵形半肠吸虫成虫、童虫、虫卵的体表超微结构,成虫、童虫体表布满单生棘和皱折,虫卵表面光滑具卵盖．     

九龙棘蛙和棘胸蛙的染色体比较研究

本文报道了福建蛙类新纪录——九龙棘蛙相似文献   

卵形半肠吸虫成虫,单虫与虫卵扫描电镜观察

报道了用扫描电镜观察卵形半肠吸虫成虫，童虫，虫卵的体表超微结构，成虫，童虫体表皮满单生棘和皱折，虫卵表面光滑具卵盖。     

火棘中挥发性化学成分的研究

火棘中挥发性化学成分的研究周铭东，李聪，杨明挚，彭莉，马衡（云南大学生物系，昆明，６５００９１）（云南大学实验中心，昆明，６５００９１）火棘系蔷微科火棘属野生植物［１，２］Ｐｙｒａｃａｎｔｈａｃｒｅｎｕｌａｔａ（Ｄ．Ｄｏｎ）．资源十分丰富．全世界共１...     

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.     

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.     

The Analects and the Moment in Peking——The influence of a Confucian education system on the personality formation,the way of thinking and the fate of the main characters

0.Preface China has long been boasting of its colorful and immense culture which comprises of Taoism,Confucianism and Buddhism.The interwoven influence among the religions on Chinese way of thinking,on the nation＇s behavior in their social life throughout the long history is beyond list.