外源Ca^2＋对水稻幼苗生长的影响

用不同浓度外源Ｃａ＾２＋对水稻种子进行处理,探讨钙对水稻幼苗生长的影响,结果表明：低浓度（０．２５－０．５ｍｍｏｌ．Ｌ＾－１）Ｃａ＾２＋处理的水稻幼苗干物质及健壮度均高于对照,其中以０．５ｍｍｏｌ．Ｌ＾－１Ｃａ＾２＋处理效果最显著,水稻幼苗干物重及健壮度分别比对照高９．７％和８％;０．２５ｍｍｏｌ．Ｌ＾－１Ｃａ＾２＋处理的叶绿素含量均略高于对照,加钙处理水稻幼苗根系活力高于对照,过氧化氢酶活性也高     

外源Ca~(2 )对水稻幼苗生长的影响

用不同浓度外源Ｃａ２＋ 对水稻种子进行处理,探讨钙对水稻幼苗生长的影响． 结果表明：低浓度（０．２５～０．５ ｍ ｍ ｏｌ·Ｌ－ １）Ｃａ２＋ 处理的水稻幼苗干物质重及健壮度均高于对照,其中以０．５ ｍ ｍ ｏｌ·Ｌ－ １ Ｃａ２＋ 处理效果最显著,水稻幼苗干物重及健壮度分别比对照高９．７％ 和８％ ;０．２５ ｍ ｍ ｏｌ·Ｌ－ １Ｃａ２＋ 处理的叶绿素含量均略高于对照;加钙处理水稻幼苗根系活力高于对照,过氧化氢酶活性也高于对照．     

离子液体1-己基-3-甲基咪唑溴化盐对番茄种子萌发及幼苗生长的影响

用不同质量浓度(0、3、6、9、12、15mg·L-1)的离子液体1-己基-3-甲基咪唑溴化盐([C6mim]Br)水溶液对番茄金顶一号品种进行浸种和苗期水培,研究了种子萌发、幼苗形态以及幼苗叶片生理生化的变化.结果表明,当离子液体质量浓度9mg·L-1时,种子发芽率比对照降低差异显著;当离子液体质量浓度6mg·L-1时,根长和苗长比对照降低差异极显著.本研究所设的所有离子液体质量浓度均使番茄幼苗叶片中叶绿素含量比对照降低差异显著,尤其是当9mg·L-1时则差异极显著.幼苗叶片超氧化物歧化酶(SOD)在离子液体质量浓度为6~12mg·L-1和15mg·L-1时分别比对照降低达显著与极显著水平,当离子液体质量浓度12mg·L-1时,POD活力比对照降低差异极显著.处理组幼苗叶片中超氧阴离子(O2·-)产生速率和丙二醛(MDA)含量分别在离子液体质量浓度6mg·L-1和9mg·L-1时比对照增加,达极显著差异水平.在本试验条件下,离子液体1-己基-3-甲基咪唑溴化盐对番茄种子萌发和幼苗生长均具有明显的抑制效应.     

山核桃果皮黄酮提取液对四种作物苗期光合性能的影响

采用6种浓度山核桃果皮黄酮提取液（0.1～2.0mg·L^-1）处理盆栽小麦、玉米、大豆和绿豆幼苗,研究对苗期叶片光合速率、气孔导度、蒸腾速率、细胞间隙CO2等光合性能的影响.结果显示：在试验浓度范围内,黄酮提取液对四种作物苗期的光合性能具有低浓度促进、高浓度抑制影响;0.1、0.5mg·L^-1黄酮提取液提高了叶绿素a、叶绿素b和叶绿素总量,促进光合速率、气孔导度、蒸腾速率,适当增加细胞间隙内部的CO2浓度,以0.1mg·L^-1处理效果最明显,与对照相比,四种作物的叶绿素总量和光合速率最高增加了20.9%和21%,处理的影响达显著或极显著水平（（P〈0.05或P〈0.01）;超过0.5mg·L^-1叶绿素含量、光合速率、气孔导度、蒸腾速率逐渐降低,细胞间隙的CO2浓度快速增加.研究表明,适宜浓度的山核桃黄酮提取液具有提高叶片叶绿素含量,促进气孔开放度,增加对细胞内的CO2供应,改善叶片光合性能的作用.     

尿素和硼及生长调节剂对荔枝花粉萌发与生长的影响

25度条件下,在荔枝花粉萌发培养基上添加0．1％－0．4％的尿素,0．1－1．5％的硼酸及0．1－1．0mg.L^-1的萘乙酸均不同程度地促进花粉萌发与花粉管生,5－50mg.L^-1乙烯对花粉的萌发与花粉管生长则有抑制作用,抑制程度与其浓度呈正相关,在1－5mg.L^-1的BA下,花粉萌发率下降,但花粉管生长受促,25mg.L^-1BA可显著抑制花粉的萌花与生长,三个荔枝品种花粉萌发对温度较敏感,18度时不萌发。     

林业废弃物山核桃果皮黄酮对作物苗期营养吸收的影响

以盆栽小麦、玉米、大豆和绿豆幼苗为材料,研究了6个浓度山核桃黄酮提取液（0.1～2.0 mg·L ^－1）处理对四种作物幼苗新生根系的电导率、根系活力、硝酸还原酶活性、营养元素吸收、生物量的影响．结果显示：0.1～0.5 mg·L ^－1黄酮提取液对四种作物的苗期营养生长具有良好的促进效应,小麦和绿豆的根系活力分别为0.29、0.35ug ．dg ^－1．h^－1,比对照提高40％～24％,大豆和玉米的硝酸还原酶活性分别是49.9、53.1mg ．L ^－1,比对照增加54％～24％,处理对四种作物的影响达极显著或显著水平（ P＜0.01,P＜0.05）;适宜浓度的黄酮提取液能显著增加幼苗的鲜重与干重;促进根系对N、K、Ca、M g、Fe、M n、Cu和Zn的吸收,但对四种作物促进效应的浓度各有差异．研究表明：适宜浓度的山核桃黄酮提取液具有促进四种作物苗期生长、改善幼苗新生根系对矿质营养吸收的作用．     

外源一氧化氮对铬胁迫下小麦幼苗生理的影响

研究了在40 mg·L^-1Cr6＋胁迫下,0.1 mmol·L^-1～1.0 mmol·L^-1外源NO供体硝普钠（SNP）处理对小麦幼苗生长、叶绿素含量、丙二醛含量、相对电导率、叶片保护酶（SOD、POD和CAT）活性和可溶性糖含量的影响.结果表明,NO缓解小麦幼苗Cr6＋胁迫具有剂量效应,以0.4 mmol·L^-1SNP的效果最好.     

BN系列生长调节剂在油菜上的应用效果初报

研究结果表明：在油菜的抽薹期和初花期以清水为对照，分别喷洒BN－1型浓度为4mg/kg,6mg/kg,8mg/kg和BN－2型浓度为2mg/kg,4mg/kg,6mg/kg的生长调节剂均能使油菜角果变宽，表面积增加，光合面积增大，促进了光合产物的形成 和积累，对籽粒浆增生起到了重要作用，油菜单株产量显著提高，在油菜抽薹期以BN－1型浓度为8mg/kg的效果良好，初花期则以BN－1型6mg/kg的效果最好，另外BN－1型浓度6mg/kg的处理对油菜抽薹速度有显著的促进作用，BN－2型4mg/kg次之。     

磷素水平对水稻幼苗生长发育的影响

以4种不同基因型水稻为材料,研究磷素水平对水稻幼苗的生物学和营养学性状的影响.结果表明:低磷处理对水稻幼苗各生物学性状影响很大,低磷条件下水稻幼苗株高、鲜重、干重均低于对照处理,根长伸长,根冠比增大;供磷过量处理水稻幼苗株高和干重低于对照.四种水稻幼苗相比,高优35的磷素利用效率明显低于其它三个品种.     

遮荫和ABT生根粉处理对移栽猕猴桃幼苗的影响

通过对不同遮荫方式和不同浓度ABT3号生根粉溶液处理的猕猴桃移栽幼苗的生长状况调查发生遮荫可以降低幼苗叶面温度，保持圃地土壤湿润，促进幼苗生长。用遮阳网遮荫的效果优于草席遮荫。用50－100mg/LABT3号生根粉溶液蘸根移栽猕猴桃幼苗可以提高移栽成活率12％－16％，且移栽苗早期生长旺盛，苗高、地茎、主根长、侧根数都显著高于对照，为后期生长打下了良好基础。     

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.     

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.     

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.     

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.     

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.     

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.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that