脱硫副产物与腐植酸混合施用对盐碱土速效养分的影响

以内蒙古呼和浩特市土默特左旗伊利牧场的盐碱地为研究对象，研究了燃煤烟气脱硫副产物对盐碱土的速效磷、速效钾、碱解氮等营养元素的影响。结果表明：盐碱地施用脱硫石膏后对营养元素有一定的影响，速效磷、速效钾、碱解氮与改良前比显著提高，速效磷和碱解氮的变化趋势相似，第二年的含量都高于第一年的，随着时间的持续改良效果显著，速效钾在改良初期明显的增加，之后一直递减，因为没施钾肥，随着植物的利用土壤中钾素递减。盐碱地改良后，施用肥料会提高利用率。     

苹果园白三叶草栽培的效果研究

在苹果园种植白三叶草进行试验研究。结果表明，白三叶草不仅能有效抑制杂草生长、改良土壤结构、调节水分，而且能够显著提高土壤有机质、碱解氮、速效磷、速效钾含量，有利于苹果产量和质量的提高。     

农用治碱聚乙烯波纹管

以高、低压聚乙烯为原料经挤出波纹成型的“农用治碱聚乙烯波纹管”具有耐压、耐腐蚀、质轻、随意弯曲不变形等优点，可用于农业排水治碱，淋盐改土。长期以来，我省许多耕地由于受盐碱侵蚀，加上干旱，严重影响了农业生产的发展，为适应我省农业发展的需要，埋设塑料波纹管，利用地下暗管排水治碱，改造荒地，改良土壤，扩大耕地，提高农作物单位面积产量，已成为我省农田基本建设的重要措施之一。试制生产的“农用治碱聚乙烯波纹管”其物理机械性能已达到Ｑ／ＺＳ０１４—９２“农用治碱聚乙烯波纹管”标准要求，年生产能力达１００万吨，净增产值１０６万元，净增利税１６．５万元。１主要研制工作我们编制的新产品研制方案，是以设备选型、购置和原材料的采购为基础，利用国内已有的聚乙烯原料，对生产工艺、配方进行了筛选，试制生产的“农用治碱聚乙烯波纹管”，合格率达９８％以上。其产品物理机械性能由甘肃省塑料制品质量监督检验站进行了检测，全部符合标准要求。批量生产的产品经酒泉、张掖等地实际应用考核，均能达到暗管排水，改良土壤，渗灌抗旱，增加粮食产量的效果，能满足使用单位的要求，应用效果好。１．１主要原材料和主要设备仪器主要原材料：低压聚乙烯塑料（ＨＤＰＥ）大庆高压聚...     

松嫩平原盐碱化草地改良治理的研究

松嫩平原草地目前出现大面积盐碱化和碱斑，严重影响畜牧业的发展，加速生态环境的恶化，对其进行改良和治理已是科研和生产亟待解决的问题，我们在出现大面积盐碱斑的草地上开展了自然封育，生物，化学，物理和工程等改良治理的研究，通过多年的实验，证明上述措施都有一定的效果，但以生物措施治盐碱效果为最好，为今后碱化草地的改良治理提供了理论依据和治理措施。     

碱激发秸秆灰渣改良膨胀土试验研究

通过室内试验,探讨利用碱激发秸秆灰渣改良膨胀土的可行性及改良效果。试验研究了秸秆灰渣、碱激发秸秆灰渣改良膨胀土的基本工程性质指标、击实特性、胀缩特性及无侧限抗压强度的影响特征。试验研究结果表明,随着秸秆灰渣的增加或者碱溶液浓度的增加,膨胀土的塑性指数、自由膨胀率、膨胀量与膨胀力逐渐减小,这说明掺秸秆灰渣可有效降低膨胀土的胀缩性。击实样经养护后的膨胀试验结果表明,随着养护龄期的增加,膨胀土的膨胀力明显减小。无侧限抗压强度试验结果表明:没有经过养护的土样,碱激发秸秆灰渣对无侧限抗压强度的影响不够明显;经过7 d养护后,随着掺秸秆灰渣的增加,土样的无侧限抗压强度具有一定程度的提高,并且无侧限抗压强度存在一个峰值点。     

一种适合芽孢杆菌质粒DNA提取的改良碱裂解法

以Birnboim和Doly的质粒提取方法为基础,通过缩短菌体培养时间,增加菌体收集量,并对提取过程中所用的三种主要溶液的用量进行适当调整等,摸索出质粒提取的一种改良碱法.用改良后的碱法对浸麻芽孢杆菌、地衣芽孢杆菌和枯草芽孢杆菌进行质粒提取,均获成功.     

碱-碳酸盐反应热力学讨论

应用热力学方法探讨了温度对碱－碳酸盐反应的影响，反应温度升高时，反应的推动力减弱。对碱与碳酸盐发生反应生成沉淀时所需碱的浓度以及温度的影响进行了讨论。298K，PH≥10．6时，碱－碳酸盐反应能发生，反应温度升高，碱－碳酸盐反应所需碱的浓度相应增大，对氢氧化锂与碳酸盐反应可能生成碳酸锂沉淀时溶液的碱的浓度作了计算，298K，PH≥13．1时，氢氧化锂与碳酸盐反应除生成水镁石和方解石外还能生成碳酸锂沉淀，反应温度升高时，反应生成碳酸锂沉淀所需碱的浓度变化不大。     

ALLIANCE自动分析仪测定烟草及制品中的挥发碱

法国ＡＬＬＩＡＮＣＥ自动分析仪的挥发碱通道可测定烟草及制品中的挥发碱，该仪器性能稳定，能快速简便、大批量地测定烟草及其制品中的挥发碱，其测定结果与经典的蒸馏法比较，仪器的精密度和准确度均能达到分析要求，符合新国标的检测标准，结果满意．     

粉煤灰对骨料碱活性抑制工程实例

对于混凝土而言，骨料是否是碱活性骨料直接影响到混凝土的耐久性。当混凝土处于水中时，活性骨料能与碱K2O及Na2O）反应，产生体积膨胀，使混凝土遭受破坏。因此，骨料的碱活性试验是必须评判的检测指标。结合嘉陵江巨亭水电站工程实例，简述粉煤灰对于骨料碱活性的抑制作用。     

苦豆草生物碱对松材线虫的抑制作用

分别用槐果碱、苦参碱、槐胺碱、苦豆碱、野靛碱、N-甲基野靛碱、莱曼碱和总碱配制成生物碱浓度为1×10-4g/mL的PDA培养基,并在培养基上接种灰葡萄孢菌后再接种松材线虫,观察、记录松材线虫繁殖的情况。结果表明,苦豆碱、野靛碱和总碱对线虫的抑制繁殖作用都较强,其中,苦豆碱能完全抑制线虫的繁殖,且能引起线虫的死亡。对测定的生物碱的分子结构及对松材线虫的活性的分析进一步验证了关于双稠哌啶类生物碱对松材线虫的活性与其分子结构中的官能团对之间关系的假说。     

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