黄钩蛱蝶的生活史

正黄钩蛱蝶(Polygonia c-aureum)又名"黄蛱蝶",广泛分布于东亚地区,在泰山极为常见。其翅展通常不足60毫米,翅缘凹凸分明,雌雄体色相近。秋冬时节,黄钩蛱蝶会飞到不为人知的角落里躲避严寒;阳春三月,它们缓缓飞舞,在葎草和大麻叶上产卵。黄钩蛱蝶的卵呈香瓜状,卵径约0.5毫米,表面有10条纵脊。卵期约3天,幼虫孵出后会吃掉卵壳,     

冀东地区马铃薯(克新1号)地膜覆盖栽培生长动态的研究

采用田间试验与室内分析相结合的方法，研究了冀东地区马铃薯(克新1号)在地膜覆盖栽培、块茎产量38718kg／hm^2条件下的植株生长动态。结果表明：植株鲜重、干重随生长进程而增加．5月17日～5月31日，是马铃薯茎枝鲜重、干重增长最快的时期，分别占各自总增长量的44．36％，34．35％。4月16日～5月16日，植株生产的干物质主要分配在叶中、茎枝次之、块茎最少；此后，干物质向块茎分配的比率则明显上升，收获时，植株生产的干物质主要贮存在块茎中，占植株总干重的74．43％。     

鮸状黄姑鱼与大黄鱼人工杂交子代的胚胎发育

以Mian状黄姑鱼为母本、大黄鱼为父本的人工杂交试验表明：在温度17－20℃、盐度29．9－30．8的条件下，杂交卵经39.9h孵出，受精率为58．9％，孵化率为1．4％，仔鱼存活18d。对照组Mian状黄姑鱼受精率95％，受精卵孵化率56％。杂交组受精卵的胚胎发育与母本Mian状黄姑鱼的胚胎发育主要差别为：杂交卵在进入原肠期时，多数胚胎发育速度明显变慢，囊胚不能正常下包，胚胎畸形率较高。     

日本血吸虫卵卵壳超微结构的研究——Ⅱ.应用扫描电镜对卵壳超微结构的观察

作者等(1981)于前文报告通过透射电镜查见日本血吸虫卵卵壳外侧具有微刺,并首次发现卵壳层中存在微孔和微管等结构。本文则报告应用描扫电镜对日本血吸虫卵卵壳表面形貌和结构进行观察的结果。     

矮牵牛优质穴盘苗氮磷钾吸收规律研究

以美国泛美公司的大红品种（梦幻3113）为材料，利用美国维生模式研究优质矮牵牛穴盘苗氮磷钾吸收规律．结果表明，优质穴盘苗生长发育在出苗30天到40天中干物质积累最多，为植株的最大营养需求期．在此时期，10天中氮磷吸收量与前20天吸收量接近，分别为0．49％，0．26％和0．35％，0．2％，钾吸收量为3．0％和2．16％．在此时期内，植株干物质积累最多，地上部干重在第30天和40天中间增量为11．0mg／株，而前20天增量为12．2mg／株．地下部干重则为4．9mg／株与0．9mg／株．通过对主要生理指标的叶绿素含量和根系活力及光合效率的测定表明，随着植株的发育生理活性显著增强．     

黄鳝［Monopterus albus(Zuiew)］卵营养成分分析

分析了黄鳝成熟卵的水分、蛋白质和脂肪含量及其氨基酸的组成.结果表明：蛋白质占卵重的21.2％；脂肪占8.2％；必需氨基酸占氨基酸总量的46.27％，其中谷氨酸含量明显较高，占氨基酸总量的13.22％.     

鲁奇炉焦油化学组成的研究

对鲁奇炉气化产生的焦油Ｌ和传统炼焦产生的高温焦油Ｇ，用溶剂萃取方法分离 成油、沥青烯和苯不溶物三种馏分；油馏分再用柱色层方法进一步分离成脂肪族、芳 香族和极性物三种亚馏分。用毛细色谱、色－质谱详细分析脂肪族和芳香族亚馏分， 定性、定量鉴定约１５０种化合物。用红外光谱分析油和沥青烯馏分，以及芳香族和 极性物亚馏分，明确了焦油Ｌ比焦油 Ｇ具有明显的脂肪－极性特征，其化学组成非 常复杂。     

褐家鼠身体热值,水分和脂肪含量研究

本文研究了褐家鼠身体热值、水分和脂肪含量的季节变化。褐家鼠的年平均干重热值为４．９９ｋｃａｌ／ｇ，年平均不分含量６８．２５％，年平均脂肪量１４．６９％，身体热值和脂肪含量皆是夏季最高，水分含量则在冬季最高，影响褐家鼠身体热值及脂肪 变化的主要因素是繁殖。     

冀东地区冬小麦京冬8号晚播的生长动态

采用田间试验与室内分析相结合的方法,对冀东地区冬小麦京冬8号晚播高产（8111．52kg／hm^2）水平下植株的生长动态进行了研究。结果表明：出苗后植株鲜重、干重不断增加,分别在开花后24d,成熟时达一生最大值。其中,植株鲜重以拔节至挑旗增长速度最快（占最大值的42．13％）,干重以挑旗至开花增长速度最快（占最大值的36．73％）。开花后,子粒鲜重、干重开始逐渐增加,成熟时达最大值,期间,以开花后12-24d子粒鲜重、干重增长速度最快,分别占最大值的51．11％和50．48％;出苗至挑旗,植株干物质的分配以叶片、叶鞘为主;挑旗至开花后12d,植株干物质分配以茎秆为主;此后,干物质向子粒中的分配迅速增加,成熟时,植株积累的干物质主要贮存在籽粒、茎秆中,分别占植株总干物重的36．93％和36．86％。     

蛋鸡饲料的区分及用途

在养殖蛋鸡的生产实践中，有些养殖户养鸡多年，但对鸡饲料的知识知之甚少，这里就简要地给大家介绍一下饲料的区分方法。 能量饲料： 能量饲料是指饲料干物质中粗纤维含量低于18％，粗蛋白质含量低于20％，且每千克饲料干物质含消化能在2500大卡以上的饲料，例如玉米、大麦、养麦、糖麸等，是供给蛋鸡的主要能量来源。     

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