温光盐对哈德半盘藻细胞分裂的影响

哈德半盘藻，培养种群在光暗周期中细胞分裂呈现每天三次繁殖峰的模式。细胞分裂受光、温因子的影响，光强度和光周期能够制约细胞的分裂频率和分裂的定时，而温度仅影响分裂频率。     

2006年夏季渤海湾赤潮重点监控区的网采浮游植物群落

研究了2006年夏季渤海湾赤潮重点监控区6个测站大面积调查的网采浮游植物物种及其群落特征，共发现浮游植物5门32属60种，物种主要以硅藻为主，但甲藻在群落中的比重也很明显，在个别站位上成为优势类群．优势物种主要为格氏圆筛藻（C.granii Gough）、星脐圆筛藻（C.asteromphalus）、琼氏圆筛藻（C.jonesianus）和中华盒形藻（Biddulphia sinensis）.细胞丰度的站住分布主要由浮游硅藻的分布所决定，其高值区分布在4号站住．     

光暗周期对3种海洋浮游硅藻胞外多糖生产的影响

3种海洋浮游硅藻,网纹三角藻(Triceratiumreticulum),骨条藻(Skeletonemasp.)和三角褐指藻(Phaeodacty lumtriconutum)培养在3种不同的光暗周期下,研究了光暗周期对硅藻胞外多糖生产的影响.结果表明,光暗周期对硅藻胞外多糖生产的影响具有种间特异性,且与细胞生长周期有关.网纹三角藻和三角褐指藻在长光照条件下(L/D:16/8h),胞外多糖含量较高,前者最大值出现在生长期前期,而后者则在生长期后期;骨条藻在短光照条件下(L/D:8/16h)胞外多糖含量较高,最大值出现在生长期后期.3种硅藻中,网纹三角藻的胞外多糖的产量最高,达103～104pg/cell,中肋骨条藻和三角褐指藻则较低.光暗周期可能影响了细胞内光吸收总量、细胞分裂模式及细胞内有机物质的合成,从而影响到胞外多糖的生产分泌.     

环境因子对高盒形藻细胞内蛋白质和氨基酸含量的影响

在实验室模拟条件下研究了光强、温度和氮磷比等环境因子对高盒形藻细胞内蛋白质（Ｐｒ）和氨基酸（ＡＡ）的影响．结果表明：该藻细胞内的Ｐｒ和ＡＡ含量在３０６５～１００８５ｌｘ光强内随光强的增强而降低；在２７℃左右达到最大；当氮磷比为１６时有最高值，光强、温度及光照的亮暗交替变化不影响该藻细胞内ＡＡ与Ｐｒ的含量百分比，但介质Ｎ／Ｐ比值与ＡＡ／Ｐｒ百分比呈线性相关。     

肝抑素研究Ⅱ——小鼠再生肝细胞分裂规律及兔肝抑素对肝细胞分裂中期作用的研究

本文通过一系列实验,确定了昆明小鼠再生肝的细胞分裂高峰在肝大部切除后48及72小时,并以此为依据,在细胞分裂高峰期(48小时),观察了本室提取的兔肝抑素对细胞分裂期的影响,结果发现分裂中期的细胞受到了抑制,表现为中期分裂相的累积和后期分裂相的减少。     

新型平板反应器内光暗周期的仿真优化

利用Fluent软件,对加入扰流柱的新型平板光生物反应器内的微藻细胞运动轨迹进行仿真,基于Cornet模型计算微藻细胞经历的光暗周期. 根据藻液浓度变化,优化入射光强,以保证在不同藻液浓度下藻细胞平均光暗周期始终保持最小,约4.25s. 根据仿真结果,对不同藻液浓度下达到最优平均光暗周期所需的入射光强进行拟合,相关系数（R²）达到0.9994,为平板反应器的进一步优化设计提供了新的思路.     

东海低氧区浮游植物群落的昼夜垂直变化

根据2011年5月航次(春季)、8月航次(夏季)和11月航次(秋季)在东海低氧区共6个站位进行的昼夜连续观测所获浮游植物水样,用Uterm?hl方法分析了浮游植物群落的昼夜垂直变化.春季共检出浮游植物99种,优势种为具齿原甲藻(Prorocentrum dentatum)、具槽帕拉藻(Paralia sulcata)和骨条藻(Skeletonema sp.);夏季检出93种,优势种为劳氏角毛藻(Chaetoceros lauderi)、铁氏束毛藻(Trichodesmium thiebautii)、具槽帕拉藻;秋季检出78种,优势种为具槽帕拉藻、骨条藻和圆筛藻(Coscinodiscus sp.).春季细胞丰度明显高于夏、秋季;春、夏季细胞丰度随水深增加逐渐降低,秋季细胞丰度分布较均匀;春、夏季上层水体浮游植物丰度昼夜变化较剧烈,下层水体相对平缓;秋季D3站位表层和J1站位底层细胞丰度昼夜变化较剧烈,其余水层细胞丰度昼夜波动不明显.春季D2站位20,m水层及夏季O11站位各水层优势种组成存在明显的昼夜变化,其余各水层浮游植物群集相对稳定.调查站位各水层间浮游植物群集结构差异明显.     

温度对萍乡显性核不育水稻育性转换的影响

利用人工控温条件和自然光温条件,研究了萍乡显性核不育水稻育性转换的特性。结果表明：在各温度因子中,光期温度在育性转换中的作用最大,其次为日均温,在一定的范围内,花粉可育率随光期温度的升高而增加;自然条件下,该水稻具有两个明显的育性转换期,即7月25日前抽穗为不育期,7月29日—9月2日抽穗为可育期,9月5日后抽穗进入稳定的不育期。     

细胞周期及其控制

细胞周期(cell cycle)是指细胞从前一次分裂结束到下一次分裂结束这一间隔时期而言。在这个过程中包括两个阶段——细胞分裂间期和细胞分裂期。在细胞周期中,细胞要经历一系列的有规律的变化——形态学的和生理生化的。这些变化与生物体的生长发育和新陈代谢有着极为密切的关系。所以细胞周期的研究,不仅具有重要的理论意义,而且在生产实践中非常重要。本文着重讨论一下有关细胞周期的划分、细胞周期各个时期的生化特点和控制的近代观念。     

湖沼海链藻的光学镜及扫描电子显微镜研究

圆筛藻属(Coscinodiscus)及海链藻属(Thalassiosira)的电镜研究日趋增多,其中 G.R.Hasle,G.A.Fryxell 及 M.Brooks 等对圆筛藻属及海链藻属的微观结构研究要算目前在种类的形态分类研究中最为详尽细致的了。由于应用电镜技术圆筛藻属的许多种类都移入到海链藻属之中。而湖沼海链藻(Thalassiosira lacustris Grun.)为我国广泛分布的海链藻属中少数的淡水种类之一,     

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.     

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     

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