树干注入络合铁肥矫治缺铁黄化李树的效果

研究评价了对李树树干注入络合铁肥矫治缺铁性黄化症的效果。注铁后，不仅叶内的全铁、活性铁及叶绿素含量显著增加，而且提高了其氮、磷、镁、锰、锌的含量及降低了钾、钙、硼的含量。文章比较了元素间的相关性及处理与正常叶间的关联性。     

祁连山森林土壤肥力的研究

研究表明,祁连山不同森林群落土壤有机质含量3．674％～11．974％,灌木林最高,达11．974％,祁连圆柏林最低,为3．674％;土壤全氮含量范围0．154％～0．698％;灌木林下土壤中全氮的最高,祁连圆柏林下土壤中全氮的含量最低;土壤全磷含量依次为灌木林（0．132％）〉苔藓云杉林（0．128％,山地碳酸盐灰褐土）〉苔藓云杉林（0．117％,山地淋溶灰褐土）〉祁连圆柏林（0．115％）〉苔藓灌木云杉林（0．105％）;土壤水解氮、速效磷和速效钾的含量分别为6．545～19．18mg／100g、7．72—15．36mg／100g和8．59～15．33mg／100g土。灌木林土壤中的含氮量、水解氮、全磷分别为祁连圆柏林的4．5、1．72、1．15倍,土壤呼吸强度和纤维素分解强度苔藓云杉林最大,灌木林最小。森林群落枯落物积累量的减少,是造成有机质含量降低的根本原因。     

华安县绿竹林能量的研究

研究了１９９７年１月福建省华安县绿竹（Ｄｅｎｄｒｏｃａｌａｍｏｐｓｉｓｏｌｄｈａｍｉ）林各组分的热值、能量现存量;１９９６年７月至１９９７年６月绿竹叶与细根分解过程的热值变化．结果表明：１）１９９７年１月绿竹林各组分的灰分含量有较大差异,在３．８２％～１７．６６％之间,杆的灰分含量最低,叶的灰分含量最高;干重热值在１６６２５．５～１８６４８．２Ｊ／ｇ之间,细根的干重热值最低,杆的干重热值最高．２）１９９６年７月至１９９７年６月绿竹叶的干重热值有一定的季节变化,干重热值在冬季最低．３）１９９６年７月至１９９７年６月绿竹细根分解过程中干重热值呈现上升、而后逐渐下降的趋势．     

ICP-AES法同时测定猴头菇中13种元素

应用ICP-AES法同时测定了猴头菇中13种元素并进行了成分分析，结果表明，猴头菇中含有较稳定的大分子糖，很难通过湿法HNO3-HClO4完全消解，采用干法灰化，用ICP-AES法测定钾、磷、钠、钙、镁、锰、铁、铜、锌、硒、锶、镉、铅13种元素的含量，其相对标准偏差为0．72％～6．83％（n=7），回收率为90．9％～105．2％．     

应用稀土元素提高天然草原初级生产力的研究

在天然草原上的稀土元素喷施浓度、时间、次数和不同化合物的比较研究表明：适宜的喷施浓度为１０×１０￣（－４）～１５×１０￣（－４），可增产８．６７％～１５．４５％；适宜的喷施时间为６月下旬，可增产２０．２０％；以喷３或４次的生物量较高，增产２５．７５％～３５．１４％；不同化合物的比较试验初步证明，是稀土元素起增产作用，而不是硝酸根中的氮；５３２ｈｍ￣２的中间试验，３年平均增产１１．８７％，幅度为８．９９％～１５．６３％．有较好的经济效益．     

薄层扫描法测定蒙成药查干汤中苦参碱的含量

目的：建立蒙药查干汤中苦参碱的含量测定方法．方法：采用了薄层扫描法，以苯-丙酮-醋酸乙酯-浓氮试液（2：3：4：0．2）为展开剂，稀碘化铋钾试液为显色剂；λS=520nm，λR=650nm，双波长反射法锯齿扫描．结果：苦参碱溶液在2．14～6．42μg范围内具有良好的线性关系，r=0．998；平均回收率为97．62％．CV（％）=1．73（n=5）．结论：建立的方法分离效果好，结果稳定、可靠、准确，具有良好的重复性，可作为该制剂中苦参碱的含量测定方法．     

广西部分杧果园土壤营养状况及田间施肥试验

在对广西田阳、田东、钦州和防城果主要产区的代表性果园（１６个）进行土壤农化性状调查的基础上,进行Ｎ、Ｐ、Ｋ、Ｍｇ田间施肥试验,试验小区５个,随机区组排列,每小区５株,重复４次。土壤调查表明,供试果园土壤有机质含量（ｇ／ｋｇ）１１．４４～１２．０９,全Ｎ量（ｇ／ｋｇ）０．５３～０．９２,全Ｐ量（ｇ／ｋｇ）０．２０～０．３８,全Ｋ量（ｇ／ｋｇ）５．１４～１８．４３。速效Ｐ（ｍｇ／ｋｇ）０．８～２６．２,速效Ｋ（ｍｇ／ｋｇ）３３．９～５３．３。田间试验结果表明,施Ｎ、Ｋ配镁肥,能改善果植株的营养状况。施钾配镁肥,落果率可减少２０．８７％。在试验施肥条件下,单株产量提高０．８５千克／株。增施Ｎ、Ｋ配施Ｍｇ肥,单果重达３２３ｇ,此外施Ｋ,可提高果实粗蛋白和ＶＣ含量,可食部分略有增加。Ｎ２ＰＫ２Ｍｇ处理的果在室内气温２６．５℃～３２．５℃,６４％～８９％的相对湿度下,可贮藏２３ｄ。     

KF/Al_2O_3催化合成月桂氮酮

以ＫＦ／Ａｌ２Ｏ３作催化剂合成月桂氮艹卓酮（Ⅰ）,在已内酰胺、溴代十二烷、催化剂的摩尔比为１．００∶１．２０∶０．２０７,反应温度６０～６５℃下,反应３．５ｈ,Ｉ的收率为９４．３％,产品Ｉ在粗品中的含量达９４．７％,己内酰胺的含量小于０．１％．精制后Ｉ的含量为９８．８％,总收率为８８．３％．     

神农架山地土壤的基本肥力特征

为了解神农架地区土壤的基本肥力特征,在神农架进行为期20多天的野外土壤调查,采集156个土壤样品,并分析测定土壤砾石含量、pH值、有机质、碱解氮、速效磷和速效钾的含量．结果表明,神农架土壤砾石含量在0～87％之间,砾石含量大于10％的土壤占65．4％．土壤pH在3．8～8．0之间,酸性和强酸性土壤占73．1％,没有强碱性土壤．土壤有机质含量分别在1．9-144．0gkg。之间,有机质丰富的占50％．碱解氮、速效磷和速效钾含量范围分别为26～766、1．8～115．3和16-399mgkg-1,碱解氮丰富的土壤占67．3％,速效磷丰富的土壤不足20％,而缺乏的却占63％,速效钾丰富和缺乏各占30％左右．相关分析表明,土壤有机质、碱解氮、速效磷和速效钾相互之间均呈极显著的线性相关,土壤有机质与碱解氮的相关性最高,与速效磷的相关性最低．总之,神农架土壤具有砾质性,以酸性土壤为主,有机质和碱解氮处于丰富水平,速效磷处于缺乏水平,速效钾处于中等水平．     

应用外源激素诱导黑熊同期发情试验

应用孕激素、苯甲酸雌二醇、孕马血清和前列腺素、孕马血清或促卵泡素探索黑熊人工诱导发情。发情检查采用外阴观察并结合阴道涂片。繁殖季节试验母熊１６头，效果明显；非繁殖季节试验９头，发情率１００％，３ｄ发情同期率为６６．６（６／９）；５ｄ为３３．３（３／９）。     

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