硅对盐胁迫下金丝小枣3种抗氧化酶的影响

以1年生金丝小枣嫁接苗为试材,研究硅对盆栽苗在盐胁迫下谷胱甘肽过氧化物酶(GSH-Px)、超氧化物歧化酶(SOD)和过氧化物酶(POD)活性的影响.结果表明:在盐浓度(NaCl质量分数)小于0.4%时,SOD和GSH-Px的活性随着土壤含盐量的增加而增加,POD活性在NaCl质量分数为0.25%的盐胁迫下升高,在NaCl质量分数为0.4%的盐胁迫时下降;盐胁迫下加硅可以显著提高金丝小枣SOD、POD和GSH-Px的活性且差异显著.笔者认为盐胁迫下给土壤施硅可以缓解盐分对金丝小枣的毒害作用.     

Development and Experimental Research of kW—scale Molten Carbonate Fuel Cells

A kW-scale moten carbonate fuel cells stack was developed and 800-hours‘ operating test and performance experimental research had been done.Utilizing domestic materials completely,we developed NiO cathode and Ni-Al aonde with the active area of 336cm^2 and γ-LiAlO2 electrolyte tile and bipolar plate with the area of 900cm^2,The stack was composed of thirth cells,with 62% Li2CO3 38% K2CO3 as its electrolyte,During the 800hours continuous operating,the performance of the stack was stable.With 99.7%(mole fraction)H2 as fuel and O2 from air as oxidant,the average operating voltage of a cell was about 0.72V.The maximal current density attained to 165mA/cm^2.and the maximal output power attained to 1080Watt.The whole perfomance of the stack approached to the international level in the early 90‘s ,This paper gives the main works and experimants results.     

Neural—networks—based Modelling and a Fuzzy Neural Networks Controller of MCFC

Molten Carbonate Fuel Cells(MCFC) are produced with a highly efficient and clean power generation technology which will soon be widely utilized.The temperature characters of MCFC stack are briefly analyzed.A radial basis function (RBF) neural networks identification technology is applied to set up the temperature nonlinear model of MCFC stack,and the identification structure,algorithm and modeling training process are given in detail.A fuzzy controllery of MCFC stack is designed.In order to improve its online control ability,a neural network trained by the I/O data of a fuzzy controller is designed.The neural networks can memorize and expand the inference rules of the fuzzy controller and substitute for the fuzzy controller to control MCFC stack online,A detailed design of the controller is given,The validity of MCFC stack modilling based on neural networks and the superior performance of the fuzzy neural networks controller are proved by Simulations.     

SBR法处理城市污水除磷效果及规律研究

介绍用SBR法(序批式活性污泥法)处理广州地区城市污水，研究了生物除磷效果及影响除磷的各种因素。试验结果表明：①磷的出水指标可以达到国家一级排放标准，去除率达85％-99％；②污泥龄是影响脱氮除磷的关键；③磷的厌氧释放是好氧吸收的前提条件。     

煤中钍的催化极谱测定

介绍了一种煤中痕量钍的测定方法。此方法的相对标准偏差小于597%,回收率为87%～112%。     

电抗器在中频无刷同步发电机并联中的应用

分析了传统的同步发电机并联方法的不足,针对中频无刷同步发电机的特点,提出了一种利用电抗器来改进的办法并通过实验对其可行性进行了验证,实验结果表明该方法简单有效、切实可行。     

盐胁迫下西伯利亚蓼蛋白质双向电泳分析及质谱鉴定

通过蛋白质双向电泳和质谱技术,对盐胁迫前后西伯利亚蓼的蛋白质组进行了比较分析.在pH3~10范围内,在西伯利亚蓼地下茎蛋白表达图谱中发现23个蛋白质点胁迫后的表达量与对照有明显差异(±2倍以上),其中包括一个新增蛋白点.对表达量变化较大的11个蛋白点进行质谱分析,并通过数据库检索进行蛋白质鉴定与功能预测,确定了4种蛋白质.其中的两种蛋白甘油醛-3-磷酸脱氢酶(Glyceraldehyde 3-phosphate dehydrogenase)和丙酮酸正磷酸二激酶(Pyruvate,ortho-phosphate dikinase)胁迫后高表达,说明地下茎细胞内正进行着旺盛的呼吸代谢,以提供维持植物生长发育以及抵抗外界胁迫所需的能量.     

加钙营养盐中碘含量的测定方法研究

根据加钙营养盐在磷酸介质中,加入EDTA使Ca~(2+)掩蔽,解决了加钙营养盐碘含量测定过程中结果偏低的问题,其精密度试验和回收率实验均令人满意。     

水杨酸对盐害下玉米幼功质膜稳定性及K^＋／Na^＋比的影响

盐害会伤害玉米幼苗的多种生理活动。喷施一定浓度的水杨酸（SA）能降低盐害。具体表现为：降低盐害引起的电解质泄漏,降低丙二醛含量,提高叶片内SOD、POD的活性,并调节由于盐害引起的K^ /Na^ 比例失调。     

济钢320t鱼雷罐罐口挖补浇注维护技术

济钢320t鱼雷罐罐口经常因过铁熔损而产生裂纹,严重影响了鱼雷罐的安全运行,通过对鱼雷罐罐口裂纹区域挖补浇注试验,达到鱼雷罐罐口与鱼雷罐内衬整体耐火材料侵蚀均衡的目的,进一步有效提高了鱼雷罐使用寿命。