红树海桑属植物化学成分及生物活性研究进展

海桑属植物(Sonneratia)是重要的红树资源,其果实具有药食同源特性。随着近年来对海桑属植物化学成分研究的不断加深,发现其富含甾醇、黄酮、酚类、醌类等化合物,且部分化合物显示出抗氧化、抗肿瘤、抑制病原菌等生物活性。本文按照国内外对海桑属植物化学成分的研究时间顺序进行全面的总结回顾,为以后海桑属植物食用和药用研究提供参考资料。     

黔产姜花属植物的研究进展

黔产姜花属植物包含黄姜花(Hedychium flavum)、红姜花(Hedychium coccineum)、圆瓣姜花(Hedychium forrestii)及草果药(Hedychium spicatum)。通过查阅国内外近年来有关贵州姜花属植物的研究状况,从自然分布、形态特征、化学成分、民间药用及药理药效、繁殖栽培、花卉资源等方面进行综述。以期能为该属植物的系统研究提供一定的参考。     

红景天属植物抗氧化活性研究进展

红景天是一种珍稀药食兼用植物,具有多种生理功能和药理作用,是食品医药等领域的研究热点之一.红景天属植物抗氧化性能突出,归纳介绍了与红景天属植物抗氧化活性相关的黄酮及其苷类、酪醇、红景天苷、原花青素、多糖等各类活性成分的抗氧化性能及其作用机制,有利于为红景天资源的进一步开发利用提供依据.     

内蒙古乌头属植物分类研究及其生态地理分布特点

乌头属自1754年林奈建立之后,许多学者进行过不少研究,在各种植物志或有关文献中记载了350多种。我国植物分类学家王文采同志对中国乌头属植物进行了全面、系统的研究,在中国植物志27卷(1979)中记载了167种,反映了我国乌头属植物研究的全部成果,为进一步深入研究中国乌头属植物奠定了基础。     

野茉莉属植物资源研究进展

野茉莉属植物种类众多、分布广泛,了解该属植物花、果、叶、树脂等的应用潜力可以为提高其观赏、食用、药用、油用、材用和生态等价值提供理论参考。笔者基于地理分布与种质资源遗传多样性、植株生物学与生态特性、植物化学研究以及资源利用与扩繁等方面对野茉莉属植物的国内外研究进展进行了综述。我国华南地区和巴西塞拉多地区是野茉莉属植物集中分布的区域。野茉莉属植物以白花为主,花香淡雅,是优良园林应用树种;种子油脂含量高达54%,脂肪酸组分合理、油酸和亚油酸占比达85%,可以用于生物柴油制备,相关开发研究有利于丰富我国木本油料产业资源,优化其种植结构。野茉莉属植物环境适应性强,可作为重金属污染修复树种以应对不同环境因子胁迫。该属植物树脂成分安息香是具有抗癌、提神等功效的中药物质;植株不同部位化学成分复杂多样,具有重要的药效机理研究意义。作为木材应用树种,野茉莉属植物在制浆造纸、工艺雕刻等方面应用潜力大。综上,野茉莉属植物具有很好的研究价值与产业发展前景。     

稻属植物染色体组多倍化的潜在价值

植物染色体组多倍化所导致的优势效应及其潜在价值有待于挖掘．稻属植物的遗传改良中存在着两大技术性难题有待于进一步探索．稻属植物染色组体多倍化研究中存在着3大局限性．稻属植物的同源多倍体研究中已经发现了4种值得注意的特异现象．提出了在挖掘稻属植物潜在价值研究中的技术思路．     

苗药隔山消与白族/彝族民族药物隔山消的专利研究

记录了近二十年来针对萝藦科鹅绒藤属植物苗药隔山消和牦牛儿苗科老鹳草属植物紫地榆(亦名隔山消)的医药用途的中国专利进展,并进行了比较分析。从起源、品种、定名、民间习用、功能主治、配伍规律等对二者进行了总结,为进一步研究白族、彝族民间药紫地榆提供了展望和建议。     

贵州鹅绒藤属药用植物资源分布的初步研究

对贵州萝藦科鹅绒藤属植物的种类和分布进行了调查研究,初步确定该属在贵州的分布共有13种,其中10种具有药用价值,新记录贵州鹅绒藤属植物1种,为豹药藤Cynanchum decipiens。初步掌握了鹅绒藤属药用植物资源在各地区的分布状况,为开发和利用该属药用植物提供了基础资料。     

清风藤属药用植物研究进展

清风藤科Sabiaceae清风藤属Sabia的一些植物治疗风湿性关节炎、病毒性肝炎等疾病疗效显著。药理研究发现该属植物多具有抗炎,镇痛,降酶等作用,具有很大的开发利用价值。通过查阅整理相关文献,对该属植物的生药学研究、化学成分研究、药理学研究、临床应用等方面进行综述,以期为该属植物的进一步研究及合理开发利用提供参考。     

山西庞泉沟国家自然保护区百合科药用植物的研究

本文通过调查和文献资料查阅,对庞泉沟国家自然保护区百合科药用植物进行了研究.结果表明,该区共有百合科药用植物19种,隶属于11属,分别占本区百合科植物资源总属数的84.6%、总种数的63.3%,其中这些植物的生活型单一,都是多年生草本.药用部位广泛,其中以根状茎类入药的最多,其次是鳞茎类,全草类位居第三;药用功能主要有解表药、清热药、补益药、化痰止咳平喘药等.     

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.