The physiological and ecological responses of the seed germination of Casuarina equisetifolia to chromic stress

试验研究不同浓度CrCl3 胁迫对木麻黄种子萌发初期一些生理生态特征的影响结果表明 ,随CrCl3 处理浓度的加大而木麻黄种子萌发率逐渐降低 ,幼苗株高、根长、鲜物质量和干物质量均逐渐降低 ;脯氨酸、超氧负离子含量先升后降 ,蛋白质含量逐渐升高 ;超氧化物歧化酶活性 (SOD)先升后降 ,过氧化物酶活性 (POD)和过氧化氢酶活性 (CAT)则逐渐增加 ,SOD、POD、CAT活性可作为毒物的敏感指示者。环境胁迫条件下植物体形态特征的响应常滞后于生理特征。Effects of CrCl_3 stress with different concentrations on some earlier physiological and ecological characteristics of seed germination of Casuarina equisetifolia were studied. The results show that the seed germination percentage,the plant height, root length, fresh biomass, and dry biomass of seedlings all gradually decrease with the treatments of increased CrCl_3 concentrations. At the meantime, the contents of proline and superoxide anion (O A-·D_2) increase firstly and decrease afterwards, and the content of protein gradually increases. Furthermore, the activity of the protective enzyme SOD increases firstly and decreases afterwards, and the activities of POD and CAT both gradually increase. The activities of SOD,POD,CAT can act as sensitive designators to poison, and the morphologic responses of plant usually lag behind the physiological responses when it is under the environment stress.福建省自然科学基金重点项目 (D0 12 0 0 0 1);; 泉州师范学院科研基金项目 (2 0 0 2LI0 4)资

复现高超声速飞行条件下10°尖锥标模气动力特性试验研究

综述了应用中科院力学所的JF12长试验时间激波风洞中,在复现40km高度,飞行马赫数7的试验条件下,开展的10°尖锥标模天平测力试验研究结果

The application study of Anoxic-submerged Oxic Membrane Bioreactor(A-SOMBR) treating landfill leachate

垃圾渗滤液是垃圾储存和卫生填埋的产物，是一种有毒有害的高浓度有机废水，其控制和治理已经成为当前环境保护领域一项迫切的研究课题。膜生物反应器（MBR）处理工艺的研究、开发和应用已成为高浓度有机废水处理技术领域的重要发展方向。本论文从小试到中试，系统开展了缺氧-浸没式好氧膜生物反应器（A-SOMBR）处理垃圾渗滤液的特性研究，并考察了膜污染的过程。 A-SOMBR小试试验研究结果表明：在污泥培养驯化过程中，COD平均去除率高达92%，其中A段（吸附缺氧）的贡献平均占23.6%，O段（好氧）平均占50.7%，膜的贡献平均占15.3%；试验确定各操作参数最佳值依次为：DO为2-4mg/L，MLSS为...Landfill leachate from a composing field of a finished municipal waste landfill contains high concentration organic matters and toxic substrates. It has been one urgent task that the pollution control and treatment of landfill leachate for environmental engineers in nowadays. The research development and application of membrane bioreactor has gotten more attention in treating high concentration or...学位：工学硕士院系专业：化学化工学院材料科学与工程系_材料学学号：20043602

Experimental Research on Scour Protection Range and Protection Effect of Large Diameter Monopile Foundation

[Introduction] Under the wave-current combinations during the service period of offshore wind turbine, local scour inevitably occurs around pile foundation, which threatens the overall stability and safety of offshore wind turbine. [Method] In this paper, the normal physical model test at a scale of 1∶30 was carried out for the wind power foundation with a diameter of 8.0 m to study the scour depth, sand cover, solidified soil protection range, and protection effect. [Result] The results show that due to the good hydrodynamic conditions considered in this test, the maximum scour depth is 0.133 cm. In this case, the 1 cm-thick sand cover with a splicing size of 1.0 m×1.0 m can meet the stability requirements. When solidified soil is adopted for protection, the protection range shall not be less than 5 times the pile diameter, and block stones shall be laid at the edge of solidified soil to avoid scouring at the lower part of solidified soil. [Conclusion] The test results can provide reference for scouring test and engineering design of similar projects

The application of PCR technology in detection of SPF laboratory animal rats

PCR作为一项新兴技术,越来越受到人们的重视。近几年来,PCR技术不断发展,它以准确、快速、便捷等优点广泛应用在科学研究的各个领域。PCR技术应用在实验动物领域中,可提高实验动物临床检测和监测水平。笔者主要介绍PCR技术在SPF级实验动物鼠病原微生物检测中的应用。PCR as a new technology, more and more get people＇s attention to it in a quick, accurate and convenient advantages are widely used in scientific research fields, in recent years, the PCR technology development, and application in the field of experimental animals, greatly improving the monitoring level of experimental animals, in this paper, the PCR technology in the application of the SPF laboratory animal mouse pathogenic microorganism monitoring.福建省重点项目（2014Y0083）

Using LICOM to estimate roles of topography near the Luzon Strait on Kuroshio intrusion

基于观测资料、卫星高度计资料和LICOM2.0模式一序列的地形敏感性试验，本论文首先划分吕宋海峡附近黑潮入侵方式，然后利用地形敏感性试验评估吕宋海峡附近地形对黑潮入侵的作用。主要研究成果如下： (1)基于1993–2013年AVISO卫星高度计资料，本论文定义了一个双指数(Double-index)并划分出吕宋海峡附近3种典型的黑潮入侵类型：黑潮暖涡路径、黑潮冷涡路径和黑潮泄漏路径，这展示了吕宋海峡附近黑潮与中尺度涡之间典型的空间配置关系。因此，双指数可以较好地区分黑潮入侵路径。 (2)通过逐步添加岛屿链或岛屿的方法，本论文运行了4组LICOM2.0模式的吕宋海峡附近地形敏感性试验。研究结...Based on observations, satellite altimeter data and series of topographic sensitivity experiments performed by LICOM 2.0, this thesis first classifies three typical Kuroshio intrusion paths in the Luzon Strait (LS), and then uses the experiment results to estimate roles of topography near the LS on Kuroshio intrusion. The main results are listed as follows: (1) Based on satellite altimeter data ...学位：理学博士院系专业：海洋与地球学院_物理海洋学学号：2242011015362

Cyclooxygenase-2 Mediates Cadmium-induced Kidney Injury via Endoplasmic Reticulum Stress

目的：镉及其化合物对哺乳动物的肝、肾、骨骼等脏器具有毒性损害作用。环氧合酶-2(cyclooxygenase-2，COX-2)是花生四烯酸代谢形成前列腺素家族(prostaglandins，PGs)成员通路中的关键限速酶，其在调控细胞增殖、转移、凋亡和血管形成中发挥重要作用。已有报道镉经由ROS诱导大鼠肾细胞中COX-2表达升高而引起肾损伤，同时也有报道自噬在镉诱导的肾损伤中扮演重要的作用，但是COX-2和自噬在镉暴露诱导肾毒性损伤中的作用及其机制尚待阐明。本研究拟探讨COX-2的表达是否参与镉诱导的肾毒性损伤及其调控机制。 方法：(1)体内试验，采用8~10周雄性ICR小鼠，分为4组，包括...Objectives: As a toxic heavy metal, cadmium (Cd) and its compound has toxic effect on liver, kidney, bone and other organs in mammals. As one of the key rate-limiting enzyme of arachidonic acid metabolism and prostaglandins (PGs) synthesis, cyclooxygenase-2 (COX-2) has been described to play an important role in regulation of cell proliferation, transformation, apoptosis, and angiogenesis. Recent ...学位：医学硕士院系专业：公共卫生学院_流行病与卫生统计学学号：3272013115054

马普替林对CUMS抑郁模型大鼠血清铜锌钙镁含量的影响

目的探讨部分金属元素铜、锌、钙、镁与抑郁症之间的关系。方法健康雄性SD大鼠36只,随机分为3组。采用Katz刺激方法制备CUMS抑郁模型。结果采用孤养和CUMS刺激方法成功制备动物抑郁模型。模型组血清铜含量较正常组明显升高、模型组血清锌含量较正常组明显降低;而马普替林组较模型组比较均能够逆转上述改变;关于钙和镁未发现其差异性。结论微量元素锌和铜与抑郁症密切相关,其机制可能与突触可塑性、内分泌、神经递质等因素相关

A Comparative Study of Dry Milling and Little Quantity Lubricant Milling of Aeronautic Aluminum Alloy Based on AE Signals

为了揭示少量润滑的机理,在建立切削液供应系统和数据采集系统实验平台的基础上,采集航空铝合金7050-T7451干铣削和少量润滑铣削过程中的声发射信号,并对信号从时域、能量角度进行了分析研究。研究结果表明:(1)航空铝合金铣削过程中使用切削液可以加速声发射信号的衰减;(2)主轴转速的提高使得AE信号的强度随之提高,且AE信号的能量成分向高频区域增加;(3)切削液的加入使得AE信号能量向低频区域移动,随着切削液流量的增大,这种作用将逐渐减弱。In order to reveal the mechanism of little quantity lubricantion,an experimental platform of cutting fluid supply system and signal aquasition system was established.AE signals in dry milling and LQL milling of aeronautic aluminum alloy 7050-T7451 were sampled and analyzed through time domain and energy distribution.The results show that:(1)cutting fluid can speed the attenuation of AE signal in milling process;(2)the increase of main spindle speed results in the increase of AE signal intensity,and results in the increase of energy of AE signal in high frequency band;(3)the introduction of cutting fluid in milling process makes the energy ratio of AE signal increase in low frequency band,and this function will gradually weaken with the increase of the flow rate of cutting fluid.国家自然科学基金(50875120