三翅槭种子生物特性及其发芽实验

以三翅槭模式标本树上的种子为试验材料,观测其基本形态和特性,并通过不同温度处理及不同浓度的赤霉素(GA3)、6-苄基腺嘌呤(6-BA)、吲哚乙酸(IAA)和层积处理后进行发芽实验.结果表明:三翅槭为无胚乳种子;三翅槭种子在15~25℃昼夜变温下种子萌发效果最好;不同浓度的GA3、6-BA、IAA均能打破三翅槭种子休眠,提高种子发芽率;层积处理也能较好的提高三翅槭种子发芽率;三翅槭幼苗在不同的生长时期叶片形态有明显差异.     

海巴戟的种子结构及发芽试验

对海巴戟种子的形态和结构进行了观察研究,并从环境温度、播种基质、物理处理等方面,探讨了其种子的萌发特性及生理.试验结果表明:海巴戟种子的萌发特性与其结构特点有关;高温能显著提高其种子的发芽率、发芽势和发芽指数,且高温条件下变温更有利于种子的萌发,最适宜的发芽温度是28~35℃,28℃和33℃则是发芽的最佳变温;海巴戟种子本身存在着某种抑制萌发的特殊物质,但在土壤中这种拟制萌发的状态可被打破而诱导萌发;透气和保水性能良好的播种基质对海巴戟种子的萌发有利,以河沙加泥炭土作为播种基质的海巴戟种子,发芽率最高,达77.0%,其相应的发芽势和发芽指数也最高,分别为63.5%和12.532;温水处理对海巴戟种子的萌发具有明显的促进作用,能提高它的出苗整齐度,且其发芽率和发芽势均最高,分别达74.0%和62.5%,其相应的发芽指数为12.271.     

不同温度对木兰种子萌发的影响

本文主要研究了不同温度处理条件对木兰(Magnolia lilifloraDesr)种子萌发的影响,并采用发芽率、发芽势、发芽指数对木兰种子发芽效果进行了评价。结果表明:木兰种子萌发温度幅较宽,在室温18(±2)℃~35℃范围内均能萌发,种子的发芽率、发芽势在不同温度下变化显著。在30℃恒温条件下,种子的发芽率、发芽势最高。因此,木兰种子最佳萌发温度为30℃。发芽率、发芽势、发芽指数在30℃时,分别可达29.4%、29.4%和15.1%。不同温度条件下,经过200mg.L-1GA处理的木兰种子发芽率、发芽势和发芽指数较用清水处理的木兰种子有所提高,说明GA对种子萌发有一定的促进作用。     

长柱金丝桃种子萌发特性

通过对比试验,研究温度,光照,酸、碱、盐胁迫等不同处理对长柱金丝桃种子萌发的影响.结果表明:光照可以促进种子萌发;不同温度处理对长柱金丝桃种子萌发影响显著,20℃下发芽率最高;浓度25 mmol/L的Na2CO3处理和p H为5.0,5.4的低温层积处理可明显提高种子发芽率;盐胁迫下种子能够萌发,但发芽率随盐浓度的提高而降低;碱胁迫下可以促进种子萌发,发芽率随着碱浓度的增大呈先升高后降低的趋势,浓度10 mmol/L Na2CO3下发芽率最高达74%;酸胁迫下能够萌发,发芽率随p H的降低逐渐升高,在p H为4.6下发芽率达到72%.     

当归种子活力

采用不同光照、不同温度和不同消毒处理,对4种当归种子从发芽率、发芽势、发芽指数和活力指数等指标上进行实验.结果表明:在暗培养箱25℃恒温下能明显提高当归种子发芽率;当年的当归种子发芽率明显高于存放1年的;提前抽薹种子的发芽率高于正常种子的;50℃水浴和0.2%高锰酸钾处理在降低当归种子霉变污染的同时,也显著抑制了其发芽率和发芽势.     

温度对翅果油树种子萌发的影响

本文研究了不同温度处理对翅果油树种子萌发的影响.结果表明:对种子进行剥皮和一定时间的低温处理能提高种子发芽率,其中进行-18℃冷冻后再经3℃-4℃冷藏能最大幅度的提高种子发芽率.     

陇蜀杜鹃种子发芽率的研究

对陇蜀杜鹃种子做了不同处理的发芽试验,结果表明;陇蜀杜鹃种子发芽的适宜温度为１０℃￣１５℃,用纯乙醚,９５％乙醇溶液及一定浓度的硫酸,盐酸,硝酸,氢氧化钠等处理种子后,均能显著地提高种子发芽率;不覆土播种较覆土３ｍｍ的发芽率高;种子贮藏１９个月后的发芽率较贮藏７个月后的发芽率高。     

三叶木通茎藤生长性状地理变异研究

用11个采集点野生三叶木通(Akebia.trifoliate)单株进行栽培试验,对其茎藤生长性状与采集点地理因子、试验点气候因子之间进行典型相关分析,探讨其地理变异规律.结果表明:三叶木通地理变异的基本模式是以海拔垂直梯度变异为主,纬向渐变为辅;海拔及纬度差异产生了温度和光照差异,水热因子的综合选择作用是三叶木通茎藤生长性状地理变异的重要原因,其中温度和光照是主导因子.海拔或纬度较高的地区,产生了喜温光喜湿的三叶木通气候生态类型;海拔或纬度较低地区,产生了喜温光的三叶木通气候生态类型.     

不同水温浸种对川续断种子发芽率的影响

目的:为解决川续断人工种植过程中种子发芽率低,出苗不整齐的问题。方法:使用常温清水;40℃、45℃、50℃、55℃、60℃的温水浸种进行人工催芽试验。结果:40~60℃水温浸泡种子,不同程度降低了种子的发芽率,而常温水浸种催芽川续断种子发芽率达85%以上,高于其它水温处理。建议:川续断人工种植宜采用集中育苗后移栽,可解决生产中种子直播受自然因素影响,种子发芽率低,出苗不整齐的问题。     

吸湿-回干处理对油松种子发芽率的影响

利用吸湿-回干处理技术,研究不同处理方法和不同温度对油松种子发芽率的影响。结果表明：20℃吸湿处理,能较好地提高油松种子发芽率,发芽率由77%提高到83%。吸湿-回干处理技术对油松种子发芽有一定的促进作用。     

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。     

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.