热处理对La2O3-MgO-Al2O3-SiO2-ZnO系微晶玻璃微波介电性能的影响

研究了不同的热处理制度对La2O3-MgO—Al2O3-SiO2-ZnO微晶玻璃系统微波介电性能的影响。应用X射线衍射（XRD）分析了它们的晶相组成,结果表明,ZnO质量分数为14％的样品在600℃保温不同时间,其介电常数温度系数（τε）在115．9×10^-6／℃～-81．8×10^-6／℃线性可调,相应的主晶相由MgSiO3变为ZnAl2O4,证明了晶相的组成及其相对质量分数是介电性能变化的根本原因。在600℃保温7h,850℃保温40h获得的样品的参数为：ετ=14．301;Q=1437;ετ=2．5×10^-6／℃。     

掷孢酵母对含铬废水的生物吸附

研究了掷孢酵母（Sporobolomyretaceae sp．）对含铬电镀废水的生物吸附性能．结果表明,废水的pH值和菌体的培养时间是影响该废水生物吸附的重要因素,适宜的pH为3．5～5．3;培养时间为55～72h．活性污泥的联合使用能有效地促进铬的生物吸附效果．当污泥质量（湿）浓度为10g／L时,25g／L菌体对34．4mg／L总Cr的去除与33．0mg／L Cr^6＋的还原分别高达87．3％、91．9％．对吸附机理和毒性的初步探讨结果表明,菌体对铬的吸附由表面吸附、跨壁膜运输和体内积累组成,其中体内积累对吸附的贡献值最大,达到总吸附量的70．6％;细胞壁对铬毒性的抗性理想,300mg／L铬不会对细胞壁产生0．1nm以上的形态破坏：活性污泥的联合使用有助于铬的还原。     

山荷叶的组织培养及无性系建立的研究

研究了山荷叶叶柄愈伤组织的诱导、分化、试管苗生根、移栽所需要的条件,并建立起山荷叶的无性系．结果表明：MS＋La（NO3）3·6H2O 1．2mg／L＋BA0．5mg／L＋NAA1．5mg／L是山荷叶叶柄愈伤组织诱导的理想培养基;MS＋La（NO3）3·6H2O 1．2mg／L＋BA0．5mg／L＋IAA 0．2mg／L是山荷叶愈伤组织分化的理想培养基;1／3MS＋IAA 0．5mg／L是生根培养的理想培养基;以炉灰渣为试管苗的移栽扦插基质,移栽成活率为91％;试管苗在原产地生长正常．     

添加氧化锆对钢渣微晶玻璃显微结构的影响

采用熔融法制备微晶玻璃材料，探讨了钢渣微晶玻璃中引入ZrO2对其显微结构以及性能的影响。用X衍射仪和扫描电镜分析了微晶玻璃的主晶相和显微结构。实验结果表明：引入质量分数为1％的ZrO2时，微晶玻璃的晶粒最小，抗弯强度最大；当ZrO2的添加量进一步增多，晶粒无法发育完全且晶相含量下降，导致微晶玻璃的抗弯强度降低。在该钢渣微晶玻璃中，ZrO2最佳添加量的质量分数为1％。     

四种重金属对三疣梭子蟹潘状幼体的急性毒性

2005年4月,以在浙江舟山普陀兴海养殖优质种苗选育研究所取得的三疣梭子蟹各期涵状幼体作为实验动物,开展了Hg^2＋、Cu^2＋、Zn^2＋、Cr^6＋4种重金属离子对其急性毒性实验．结果表明：三疣梭子蟹幼体对重金属的耐药性均随实验时间延长而明显降低,4种重金属离子对三疣梭子蟹各期幼体的毒性大小依次为Hg^2＋、Cu^2＋、Zn^2＋、Cr^6＋,三疣梭子蟹苗种培育中对Cu^2＋、Hg^2＋、Zn^2＋、Cr^6＋的安全质量浓度取值分别为0．0156mg／L、0．0025mg／L、0．0686mg,／L和0．5230mg／L．     

"马可"百合组培技术研究

以“马可”百合（Lilium bulbiferum cv．‘Marco Polo’）鳞片为起始外植体,MS为基本培养基,以不同激素成分及不同浓度水平来诱导“马可”百合产生小鳞茎。结果表明：“马可”百合的诱导可由外植体直接产生小鳞茎而分化成苗。诱导“马可”产生小鳞茎的最佳外植体为鳞茎内部的鳞片,将其作为不切开处理,并以鳞片远轴面紧贴培养基的方式进行接种,在MS＋6-BA（1．0mg／L）＋IBA（0．3mg／L）培养基上进行诱导培养,其平均分化系数达2．52。“马可”百合最佳扩繁增殖培养基为MS＋6-BA（0．3mg／L）＋IBA（0．3mg／L）,小鳞茎的增殖系数可达2．60。采用1／2MS＋6-BA（0．3mg／L）＋IBA（0．7mg／L）的培养基对“马可”进行生根培养,根条数可达8．0,生根率为100％。“马可”生根苗应用质量分数为50％多菌灵800倍液进行消毒处理,移植于河泥和珍珠岩的体积比为7．3的基质中,成活率可达98％。     

利用油页岩渣制备微晶玻璃

以油页岩渣为主要原料制备了微晶玻璃,探讨了微晶玻璃组成、主晶相确定和晶核剂选择等问题.采用DTA,XRD和SEM等测试手段,分析了晶核剂和热处理制度对微晶玻璃的影响.结果表明:复合晶核剂(TiO2+P2O5)能有效促进油页岩渣玻璃晶化;最佳热处理制度为:850℃核化100 min,980℃晶化80 min.微晶玻璃的主晶相为钙铁透辉石,次晶相为钙长石;晶体呈纤维状结构并且交错分布;性能明显优于同类的瓷质砖、大理石和花岗岩等建筑装饰材料.     

晶化温度对微晶玻璃析晶行为和性能的影响

本文以铬渣和铜尾矿为原料,采用熔融法制备微晶玻璃,借助XRD和SEM等分析手段,系统研究了晶化温度对微晶玻璃析晶行为的影响;研究结果表明:随着晶化温度的升高,微晶玻璃的主晶相均为普通辉石,且晶体尺寸增大,晶核数量减少,同时微晶玻璃的表观体积密度和显微硬度呈先增大后减小的趋势,当晶化温度为860℃时,表观体积密度和显微硬度达到最大,其值分别为3.06g.cm-3和925Hv。     

山西翼城高炉渣在微晶玻璃中的应用

以山西翼城高炉矿渣为主要原料,采用烧结法制备微晶玻璃.利用差热分析仪(DTA)、扫描式电子显微镜(SEM)、X射线粉末衍射仪(XRD),研究矿渣微晶玻璃的成分、制备工艺,以及对显微结构和性能等进行分析.研究结果表明,当基础玻璃化学组成(质量分数)分别为50%～60%(SiO2),4%～8%(Al2 O3),14%～19%(CaO),7%～10%(MgO),0.7%(Fe2O3),4%(Na2O),6%(K2O)时,主晶相为透辉石,高炉渣最大引入量达到47.35%,最小量为28.06%,可以获得性能良好的烧结型微晶玻璃.     

蒲苇愈伤组织的诱导和再生体系的建立

以蒲苇成熟种子为外植体,MS为基本培养基并附加不同激素组合,筛选出诱导蒲苇愈伤组织产生和分化的最佳培养基,成功建立蒲苇的再生体系．试验结果表明：蒲苇种子最佳灭菌方式是将种子灭菌前用无菌水浸泡24h左右,然后用75％酒精消毒20s,再用0．1％（W／V）氯化汞消毒灭菌10min．愈伤组织诱导的最佳培养基为MS＋2,4-D3．0mg/L＋6-BA0．1mg／L;愈伤组织分化的最佳培养基为MS＋6-BA 2．0mg／L＋NAA 0．1mg/L分化继代的最佳培养基为MS＋6-BA 1．5mg／L＋NAA 0．2mg/L;生根最佳培养基配方为1／2MS＋NAA 0．8mg/L＋6-BA 0．2mg／L＋（0．02％）AC．     

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.     

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     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the