Genome-Wide Analysis of Basic/Helix-Loop-Helix Transcription Factor Family in Rice and Arabidopsis

碱性/螺旋－环－螺旋(bHLH)转录因子家族是一个在动植物中广泛存在的基因家族。这个家族成员众多并且在动植物的生长发育过程中也起到十分重要的调控作用。但目前，这个家族成员的功能在植物中的研究还比较少。近年来，植物模式生物拟南芥和水稻的全基因组测序工作，为从基因组水平研究和比较开花植物的bHLH基因家族提供了坚实的基础。通过数据库搜索和分析，在水稻基因组中找到了165个可能的bHLH基因家族成员。系统发生分析表明，这些bHLH基因可以依据支持度划分成多个亚家族。同时，bHLH转录因子结合DNA活性预测、bHLH结构域外的保守基序(motif)分析、内含子/外显子保守结构分析等多项信息学分析的结果...The basic/helix-loop-helix (bHLH) transcription factors and their homologs form a large family in plant and animal genomes and play important roles in the specification of tissue type in animals. However, few plant bHLH proteins have been studied functionally. Recent whole genome sequences of model plants Arabidopsis thaliana and Orysa sativa allow genome-wide analysis and comparison of the bHLH f...学位：理学硕士院系专业：生命科学学院生物学系_细胞生物学学号：20032605

Distribution of dimethylsulfide of Xiamen sea surface water in spring

采用固相微萃取(SPME) 气相色谱法(GC)测定了厦门海域20个站位表层海水中DMS二甲基硫的含量,并对其分布进行分析。结果表明,厦门海域DMS含量在0 65～40 69nmol·L-1,平均浓度为12 83nmol·L-1。其中,西海域的含量最高,东海域次之,同安湾最低。与其它海域海水中DMS浓度比较,厦门海域DMS含量较高,浓度变化范围大,与叶绿素a浓度及表层水温、盐度之间无明显的相关关系。Dimethylsulfide (DMS) in surface seawater samples collected at 20 stations in the Xiamen sea area were analyzed with SPME-GC method. The results showed that the DMS concentrations varied from 0.65 to 40.69 nmol·L~(-1) with an average of 12.83 nmol·L~(-1). The concentration was the highest in Xiamen Western sea area, while was lower in Eastern sea area and the lowest in Tong'an Bay. Comparation with other sea areas, DMS concentration in Xiamen sea was higher, with the large variation. There were no clear relationships DMS with chlorophyll a, temperature and salty in Xiamen sea.国家自然科学基金(20077022);; 教育部重点课题(教技司2000第156号

Vapor-liquid-equilibrium and volume expansion calculations of CO_2/acetone,CO_2/ethanol and CO_2/ethanol/water at high pressure by using t-mPR equation of state

作者简介:蒋茂星(1983－),女,助教,主要研究方向:超临界流体技术 通信联系人:李军,教授,主要研究方向:超临界流体技术,[email protected][中文文摘]采用t-mPR状态方程(EoS)对CO2/丙酮、CO2/乙醇二元体系和CO2/乙醇/水三元体系的高压汽液平衡(VLE)、液相体积膨胀率进行计算,并与文献报道的实验数据,以及采用PR EoS得到的结果进行比较。结果表明,与PR EoS相比较,t-mPR EoS可以对上述二元体系的VLE取得较好的关联效果,对三元体系取得较好的预测效果。基于VLE的计算,进一步对上述体系的液相体积膨胀率进行预测。与PREoS相比较,t-mPREoS对二元体系的预测结果的精度有所提高,对三元体系在7.8MPa左右有最大体积膨胀率,模型预测较好。[英文文摘]The vapor-liquid equilibirum (VLE) and volume expansion of the liquid phases for the CO2/acetone and CO2/ethanol binary systems and the CO2/ethanol/water ternary system have been investigated using the t-mPR equation of state (t-mPR EoS). Calcualted results have been compared with published experimental data and those obtained from the PR equation of state (PR EoS). The correlations for the published VLE data of the above binary systems and the prediction for the ternary system showed that both the t-mPR EoS and the PR EoS can provide fairly good VLE calculations, but t-mPR EoS gives slightly better results. The volume expansion prediction for the above systems and the comparison with the published data showed that the t-mPR EoS gives better results to PR-EoS for the binary systems and provides more reasonable results around 7.8 MPa (there exists a maximum volume expansion) for the ternay system.高等学校博士学科点专项科研基金资助项目(20100121110009

Effect of Flue-gas Cleaning Devices on Mercury Emission From Coal-fired Boiler

为研究燃煤锅炉烟气净化设施对汞排放特性的影响,采用Ontario-Hydro方法,对设有催化脱硝、静电除尘、海水脱硫的300MW燃煤锅炉排放烟气中汞的含量与形态进行分析,同时测定锅炉的煤、底渣、飞灰等固体样品以及脱硫塔前后、曝气之后海水样品中的汞含量。实验结果为:烟气中的气态汞占总汞的79.1%以上,脱硝催化剂对汞的价态具有强烈的转化作用,烟气中83.4%的气态Hg0被氧化成气态Hg2+;静电除尘对颗粒态汞的去除率几乎达到100%;在脱硫塔中,海水对烟气中汞的洗脱率高达73.6%,曝气后排放前的海水中含汞量是新鲜海水的5.5倍。研究表明锅炉烟气净化设施对汞的排放特性有着重要的影响。In order to study the effect of flue-gas cleaning devices on mercury emission from coal-fired boiler, Ontario-Hydro method had been applied to determine the mercury concentration and speciation in the flue-gas emitted from a 300MW coal-fired boiler, which was equipped with various pollution control devices, including selective catalyst reduction (SCR) De-NOx system, electrostatic precipitator (ESP), and flue-gas seawater De-SO2 system (FGD). Mercury concentration in raw coal, bottom ash and fly ash of the boiler, seawater at the inlet and outlet of SO2 absorption reactor and the drainage of aeration sink, were also analyzed. The results indicate that the percentage of gaseous mercury in total mercury discharged is more than 79.1%. De-NOx catalyst strongly affects the mercury speciation transformation, showing a conversion rate of 83.4% for Hg0 to Hg2+. The removal efficiency of particulate mercury by ESP is close to 100%. With seawater FGD, the removal efficiency of mercury is as high as 73.6%. The mercury concentration in the seawater of drainage from aeration sink is 5.5 times higher than that in fresh seawater. The study shows that the flue-gas cleaning devices in coal-fired power plant play an important role on mercury emission characterization

“建筑适应性”主题沙龙

"地域建筑"是当下建筑学界共同尊重的准则,但这一术语的过度使用,也使得其内涵在当代建筑创作中逐渐模糊。本期沙龙主题"建筑适应性",是对"地域建造"这一命题的具体化。"适度"的"适应"是当下应当倡导的地域建筑设计创作原则。"建筑适应性"中的"适应",强调对历史文脉与所处环境的积极回应,研究建筑与环境之间的复杂应答关联;除此,"建筑适应性"还强调对经济、技术、材料的"适度

巡逻机器人机械臂运动学与工作空间分析

针对巡逻机器人机械臂控制问题,首先建立了该六自由度机械臂的D-H坐标系,求解机械臂正逆运动学,并基于蒙特卡洛法对机械臂的工作空间进行分析,通过MATLAB实现,得到机械臂工作空间的三维点云图,分析得出机械臂的可达工作范围,为今后对巡逻机器人的运动控制与路径规划等研究方向奠定了基础。</p

The Role of Intention in Property Right Judgments and Moral Judgments

意图会影响人们的道德判断,但尚不清楚意图在物权判断中的作用。本研究以266名非法学专业的大学生为被试,通过包含不同意图(恶意/善意/无意)的故事情境,考察了在损失求偿和获益分享情境中人们的物权判断和道德判断。结果发现,在损失求偿情境中,不管是出于善意、恶意还是无意,被试均判断行为者应当赔偿他人损失,但不认为无意的行为者应受谴责。在获益分享情境中,被试认为善意的行为者应分享给他人带来的收益且应受赞扬,但恶意的行为者不应分享收益和受赞扬。综合来看,物权判断比道德判断较少受意图信息的影响,反映人们的物权判断具有领域特异性。</p

脂筏及其在植物细胞中的研究进展

脂筏(lipid rafts)是细胞质膜上富含固醇类和鞘脂类的微结构域,其大小为10~200 nm,是一种高度动态的结构。脂筏假说认为,质膜上一些小而动态的纳米级异质性结构可以通过脂类-脂类、蛋白-脂类和蛋白-蛋白之间的相互作用形成大的反应平台,进而可以介导细胞信号的转导过程。研究表明脂筏具有多种重要的生物学功能,其中包括参与信号转导、跨膜转运、胞吞和胞吐平衡调节、细胞骨架组织以及病原菌入侵等。目前对脂筏的研究还只是近几年才得到快速发展的一个领域,但已经受到越来越多的重视,并且取得初步的研究进展。本文主要介绍了脂筏的特性和生物学功能,尤其对脂筏在植物细胞中的研究进展进行了总结,为今后系统开展脂筏的研究提供理论参考

FCS/FCCS技术及其在植物细胞生物学中的应用

荧光相关光谱(fluorescence correlation spectroscopy,FCS)是一种单分子荧光检测技术,能够灵敏地检测荧光分子的浓度、运动参数及构象变化等数据。在此技术基础上发展起来的荧光互相关光谱(fluorescence crosscorrelation spectroscopy,FCCS)突破了FCS技术只能探测单种荧光分子的限制,可以通过分析两种及以上荧光信号来研究分子间的相互作用。由于FCS和FCCS检测的快速精确性,这两种技术被越来越多的应用于生命科学的研究。本文详细阐述了荧光相关光谱和荧光互相关光谱的原理,并对其在生物学尤其是植物细胞生物学中的应用进行了介绍和总结。随着检测技术的改进和数据分析技术的完善,荧光相关光谱和荧光互相关光谱技术将在植物生物学的研究中得到越来越多的应用