氧化型染发剂的遗传毒理学效应研究

采用紫露草四分体微核技术，对氧化型染发剂中两种主要成分对苯二胺（ＰＰＤ）和过氧化氢（Ｈ２Ｏ２）及二者混合物的遗传毒理学效应进行研究。结果表明，在一定剂量下，ＰＰＤ和Ｈ２Ｏ２能诱发紫郑露草四分体微核率的提高，与阴性对照组比较，达显著或极显著差异水平（Ｐ〈０．０５或Ｐ〈０．０１），并呈剂量反应关系。而ＰＰＤ－Ｈ２Ｏ２（０．１２５％）和Ｈ２Ｏ２－ＰＰＤ（０．７５０％）两组不同类型的混合物则更能绐强烈地诱     

洗涤剂的遗传毒理学效应的研究I.紫露草四分体微核试验

应用紫露草四分体微核技术对６种洗涤剂的遗传毒理学效应进行研究，结果表明，３种洗衣粉和３种洗洁精在一定浓度剂量范围内，能够强烈地诱发紫露草四分体微核率显著提高，而且紫露草四分体微核率与洗涤剂浓度之间呈现剂量效应，直线相关回归方程分析表明，它们的相关显著或极显著，初步证明这些洗涤剂在一定浓度时具有遗传毒理学效应，而这种“潜在”的危险性应当引起人们的高度重视。     

饮用水的诱变性与肝癌的风险

应用蚕豆根尖微核技术研究了肝癌高发区的扶绥县饮用水的诱变性与肝癌发病的关系。结果表明，检测３２份不同饮水类型的饮用水（饮用塘水、塘边井水、井水、河水和自来水）中有１２份饮用塘水和２份塘边井水能明显诱导蚕豆根尖核率增高（Ｐ〈０．０１），而井水、河水和自来水所诱发的蚕豆根尖微核率与对照组则无显著差异（Ｐ〉０．０５）。提示该县饮用塘水中存在染色体畸变的物质，此类物质在各种饮水类型的水样中所诱发的蚕豆根尖     

紫露草微核技术对两种保鲜剂的诱变测试

某些用在果蔬保鲜上的杀菌剂，其毒性和诱变性对人类健康均可能存在危害，但人们常常只注重其毒性而忽视其诱变性。以紫露草微核技术对苯来特和托布津在其最低有效浓度（０．１％和０．０７％）下进行诱变试验，以未加氯的自来水作空白对照，马来酰肼（ＭＨ）为阳性对照。结果表明：苯来特（０．１％）的突变率与空白对照相比差异极显著，且有许多四分体核、质分辨不清（均染深色），浓度稀释至０．０５％的突变率比０．１０％的还要高，但核、质分辨不清的四分体很少，这表明它不仅是一种强的诱变剂，而且可破坏内膜系统，使细胞质和核内物质混合。托布津在试验中表现出的诱变性亦极强，结果表明，也是一种诱变剂。     

核靶对Drell—Yan过程K因子的影响

在微扰ＱＣＤ Ｏ（αｓ）领头阶对数近似下,采用双重Ｑ＾２－重标度模型,计算了Ｐ－Ａ碰撞Ｄｒｅｌｌ－Ｙａｎ过程Ｋ因子,并与Ｐ－Ｎ碰撞Ｄｒｅｌｌ－Ｙａｎ过程Ｋ因子进行比较。计算结果表明Ｋ因子对核质量数Ａ有很强的依赖性,且在ｘＡ〈０．１区域,随ｘＡ的减小核效应越显著。与未来实现相对照,可以检验所用的核效应理论模型及微扰ＱＣＤ理论。     

染色体断裂剂和纺锤体损伤剂诱发的有微核的嗜多染红细胞的细胞学比较观察

以染色体断裂剂：丝裂霉素Ｃ和环磷酸胺以及纺锤体损伤剂：长春新碱和秋水仙碱四种受试物分别进行小鼠骨髓微核试验．实验结果表明，两类诱变剂所诱发的大微核形成率之‘间有非常显著的差别（Ｐ＜０．０１），显示了微核形成的不同机理．本方法对快速鉴别染色体断裂剂和纺锤体损伤剂具有一定的应用价值．     

两种不同给药途径对松针提取液抗突变效应的比较研究

采用腹注和灌喂两种给药方式，研究了松针提取液对环磷酰胺诱发小鼠骨髓细胞微核形成率的影响，以观察松针提取液的抗突变效应以及给药途径对抗突变效应的影响。实验结果表明，松针提取液的二种不同给药方式对环磷酰胺的致突变性均有抑制作用，使微核率显著下降，与环磷酰胺组相比，经统计学处理有极显著性差异（Ｐ＜０１），但松针提取液抗突变效应并非剂量越大，效果越佳，只有在一定的剂量范围内，才能显示出最佳抗突变效应。亦即剂量与微核率只有在一定剂量范围内才呈现显著的负相关，相关系数分别为ｒ＝０．９８４２（ｐ＜０．０５）及ｒ＝—０．９７８２（ｐ＜０．０５）。两种不同给药方式对松针提取液的抗突变效应，经ｘ２检验无显著影响（ｘ２＝４．３７０，ｘｈ＝７．８１５，ｘ２＜ｘＺ。。），实验结果还提示，松针提取液在低剂量时不呈现致突变效应，但灌喂或腹注达一定剂量时却有一定的致突变性，因此在利用松针提取液进行肿瘤防治时，选择适当剂量至关重要。     

植物生长调节剂对苏丹草产量及粗蛋白的影响

采用裂区试验方法。结果表明：喷洒后７ｄ，株高ＧＡ３处理极显著高于ＮＡＡ处理（Ｐ＜０．０１）。１００ｍｇ．Ｌ－１ＧＡ３１５．１０－３ｋｇ．ｍ－２处理互作效应显著（Ｐ＜０．０５）。ＧＡ３处理使干物质中ＣＰ含量上升，ＣＦ含量下降。ＮＡＡ处理则相反。ＧＡ３处理影响一、二茬草，ＮＡＡ处理影响第一茬草。１００ｍｇ．Ｌ－１ＧＡ３、１５．１０－３ｋｇ．ｍ－２处理组合显著提高ＤＭ产量（Ｐ＜０．０５）。     

植物根尖微核与四分体微核技术对诱变剂和工厂废水的监测试验

本文报道了应用植物根尖微核与四分体微核技术对诱变剂和工厂废水的监测试验结果。试验表明,无论是植物的根尖细胞或花粉母细胞在分裂过程中,对诱变剂或环境中的污染物质都具有敏感性,都能产生诱变效应,尤其是在工厂废水的监测上,应用四分体微核技术更为敏感。此外,试验还表明,紫竹梅对诱变物质的敏感性接近于紫露草,但紫竹梅分布广泛,适应性强,是值得利用的环境污染监测材料。     

不同浓度的环磷酰胺对蚕豆根尖细胞微核率的影响

蚕豆根尖微核实验与染色体畸变试验同样具有准确、快速、操作简便、有明显剂量一效应关系、适合大批量样品检测等特点．研究不同浓度环磷酰胺诱发蚕豆根尖细胞微核的效应，结果表明环磷酰胺处理可诱发蚕豆根尖诱导细胞内染色体发生畸变，影响纺锤丝和中心粒而产生微核，并且诱发微核的剂量与效应关系，以及微核率与染色体畸变间的相关关系非常显著．这些研究结果表明，蚕豆根尖间期微核数量可用作检测污染物，确定污染程度的指标．     

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.