普通小麦热激处理后育性变化和A、T型CMS品系不育机理的初探

用普通小麦的不育系和保持系为材料,经高温处理以后,提取其线粒体多肽和可溶性蛋白做SDS-PAGE分析,发现不育系与保持系在热激后其线粒体多肽的电泳图谱均有相互趋同的现象.育性不稳定的A型繁91小麦雄性不育系在热激后有明显的可育度提高现象.育性稳定的T型细胞质雄性不育(CytoplasmicMaleSterility,CMS)品系及其保持系经短时间热激后没有明显育性变化.由未经热激处理的对照电泳分析可见,A型不育系、T型CMS品系花粉发育到单核期向双核期转变时,其线粒体多肽较其相应保持系明显减少,表明到此时期不育系细胞的线粒体结构与功能已明显丧失.     

普通小麦热激处理后育性变化和A、T型CMS品系不育机理的初探

用普通小麦的不育系和保持系为材料,经高温处理以后,提取其线粒体多肽和可溶性蛋白做SDS-PAGE分析,发现不育系与保持系在热激后其线粒体多肽的电泳图谱均有相互趋同的现象.育性不稳定的A型繁91小麦雄性不育系在热激后有明显的可育度提高现象.育性稳定的T型细胞质雄性不育(Cytoplasmic MaleSterility,CMS)品系及其保持系经短时间热激后没有明显育性变化.由未经热激处理的对照电泳分析可见,A型不育系、T型CMS品系花粉发育到单核期向双核期转变时,其线粒体多肽较其相应保持系明显减少,表明到此时期不育系细胞的线粒体结构与功能已明显丧失.     

水稻剑叶蛋白质的双向电泳分析

以三系杂交稻不育系武金4A,保持系武金4B剑叶为材料,利用双向电泳技术,获得了孕穗期剑叶蛋白质双向电泳图谱。经考马斯亮兰染色,可辨别出蛋白质斑点数450个左右；经银染复染后,可辨别出约800个左右蛋白质点。蛋白质相对分子量约在14.0kDa～94.0kDa范围内,主要分布在14.0kDa～67.0kDa之间；等电点(pIs)约在3.5～9.5范围内,主要分布在5.0～7.0之间。     

珍汕97不育系和保持系水稻花粉发育过程中RNA含量变化的研究

采用组织化学方法，对珍汕９７水稻不育系及保持系的花粉发育过程进行分析，结果表明从幼小的单孢花粉到单核边位出现中央大液泡时期不育系花粉细胞ＲＮＡ含量与保持系无显著差异，单核末期不育系开始败育，双核期ＲＮＡ含量与保持系双核期花粉细胞相比有显著下降，说明ＲＮＡ含量下降是珍汕９７不育系花粉败育的一个重要性生理特征，不育系花粉在单核末期以前发育是正常的。     

诸葛菜花粉不同发育时期特异性蛋白多肽研究

对诸葛菜(Orychophagmus violaceus)花粉不同发育时期蛋白多肽进行双向电泳，结果发现花粉发育的3个时期出现蛋白多肽点的数量为：单核期121个，二核期192个，三核期275个,3个时期共有(指等电点和分子量相同)的蛋白多肽点有100个．各时期特有的蛋白多肽点分别为：单核期9个，二核期15个，三核期110个。三核期蛋白多肽点数量和特有蛋白多肽点数量的大量增加，说明诸葛菜花粉发育晚期蛋白表达异常活跃，为受精提供了物质上的准备，同时还发现不同发育时期的花粉，其相应蛋白多肽的含量有增有减。     

水稻孢子体,配子体雄性不育系小孢子败育时期花药线粒体蛋…

利用ＳＤＳ－聚丙烯酰胺凝胶电泳分析了水稻孢子体雄性不育系珍汕９７Ａ，保持系珍汕９７Ｂ，ＦⅠ代汕优６３和配子体雄性不育系丛广４１Ａ，保持系丛广４１Ｂ，Ｆ１代广优青在小孢子败育时期的花药线粒体蛋白质，结果表明，在这两种类型的组合中，不育系同保持系，Ｆ１代的带型差异很大。，保持系的带型和Ｆ１代的带型差异较小。其中，汕优６３比珍汕９７Ｂ多１条分子量为３１０００的多肽带，广优青比丛广４１Ｂ多１条分子量为４３     

普通小麦T型细胞质雄性不育系及其保持系线粒体多肽的电泳比较研究

应用单向SDS—PAGE和双向IEF—SDS电泳技术对两个品种的普通小麦(T.aestivum L.)T型细胞质雄性不育系及其保持系的线粒体多肽进行了比较研究,结论如下: 1、黄化苗期普通小麦线粒体多肽单向SDS—PAGE呈现40—50条多肽带纹,双向IEF—SDS电泳图谱上则可看到150—180个多肽斑点。不育系和保持系线粒体多肽在单向SDS—PAGE和双向IEF—SDS电泳行为上无明显差别。 2、孕穗期幼穗的线粒体多肽单向SDS—PAGE图谱上,两个不育系都缺少28KD带纹,因而不育系和保持系间表现出明显的差异。双向IEF—SDS凝胶电泳证实28KD带纹实际上是分子量相同而等电点分别为5.58和5.65的两个多肽。 3、线粒体基因的表达是具有时空性质的。 4、线粒体与T型细胞质雄性不育可能存在着某种特定的关系。本文还就T型细胞质雄性不育的分子机制进行了探索性讨论。     

红莲型水稻二核期花粉蛋白质组学分析

对红莲型细胞质雄性不育水稻的不育系、保持系和杂种F1二核期花粉总蛋白质采用固相pH梯度等电聚焦/SDS-PAGE进行了双向电泳分离,获得了分辨率和重复性较好的双向电泳图谱．对其中15差异点进行了肽质指纹图分析或者LC-MS/MS分析．对已鉴定的蛋白质点进行亚细胞定位和功能分析,发现不育系相对于可育系有部分参与蛋白质缺失或表达量降低,可能与线粒体提供能量不足而导致的花粉不能正常发育有关．     

包台型水稻不育系花药发育过程中的Ca2+分布

用焦锑酸钾沉淀法研究了包台型不育水稻及其保持系花药发育早期细胞中的Ca²⁺分布变化.从花粉母细胞时期开始,不育系与保持系花药中的Ca²⁺分布出现差异,不育系药壁外层和药室内壁及药隔中均有Ca²⁺出现,而保持系花药中基本没有Ca²⁺分布,在减数分裂时期表现更加明显,不育系药壁和药隔中的Ca²⁺相对于花粉母细胞时期明显地有所增加,特别是绒毡层细胞和药隔中木质部细胞的次生加厚壁上Ca²⁺增加尤其明显,而保持系花药中的Ca²⁺较少.笔者从花药发育的更早期去寻找水稻雄性不育的机理.     

普通小麦热激处理后育性变化和A,T型CMS品？…

用普通小麦的不育系和保持系为材料,经高温处理以后,提取其线粒体多肽和可溶性蛋白做ＳＤＳ－ＰＡＧＥ分析,发现不育系与保持系在热激后其线粒体多肽的电泳图谱均有相互趋同的现象。     

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.     

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.     

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。     

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.     

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.