以1,3-二(4-邻羟基苯亚胺次甲基)苯氧基丙烷为载体的铁离子(Ⅲ)电极的研究

以1,3-二(4-邻羟基苯亚胺次甲基)苯氧基丙烷为中性载体制备了PVC膜Fe3+离子选择性电极。该电极对Fe3+呈现出良好的选择性和近Nernst电位响应性能。电极斜率为21mV/dec,线性范围为3.0×10-5～1.0×10-1mol/L,检出限为1.0×10-5mol/L。采用交流阻抗技术研究了电极的响应机理,并将电极作为指示电极初步用于EDTA的电位滴定。     

基于信息化的地表水水质预测

水利信息化技术指在水质信息管理、水质分析评价、水质预测和抗洪救灾等方面提供了多重应用需求;本文针对目前主流的计算机技术,对地表水常见水质预测方法进行分析与探索。     

多系列 PLC 控制系统升级改造

根据水厂 PLC 控制系统的具体情况和发展需求,对水厂现有的 PLC 控制系统进行升级改造.采用三菱新产品 Q 系列 PLC 升级改造落后老化的大 A 和小 A 系列 PLC 站,解决不同系列的 PLC 网络通讯问题,提高水厂 PLC 控制系统的安全性、兼容性和先进性     

过渡金属盐催化剂对抚顺油页岩热解的影响

利用FTIR、XRD研究了抚顺油页岩（OS）的组成结构,TG⁃MS分析了过渡金属盐催化剂（页岩灰作为载体负载NiCl2•6H2O、CuCl2•2H2O、ZnCl2）对OS热解的催化作用和挥发分析出的影响规律,采用Coats⁃Redfern模型分析过渡金属盐催化剂对OS热解活化能的影响。结果表明,OS中矿物质主要由石英、硅铝酸盐和少量的碳酸盐组成,有机质主要是脂肪族化合物。三种过渡金属盐催化剂对OS热解均有促进作用,且OS单独热解时,在390.1~581.8 ℃快速热解,占总失重的76.19%。动力学分析结果表明,过渡金属盐催化剂能降低OS热解所需的活化能,其中NiCl2•6H2O降低OS热解活化能的能力最高（18.7 kJ/mol）,比OS单独热解活化能降低了23.55%。过渡金属盐催化剂的催化活性由高到低排序为NiCl2•6H2O>CuCl2•2H2O>ZnCl2。此外,过渡金属盐催化剂还能促使OS热解发生挥发分的裂化、芳构化和焦化等反应,从而提高挥发分中脂肪烃（以烷烃、烯烃为代表）和芳香烃浓度。     

Magnetic levitation using diamagnetism: Mechanism,applications and prospects

As a typical contact-free manipulation technique that removes friction and contamination risk, levitation has gradually become a preferred candidate for various applications. Magnetic levitation using diamagnetism, beyond Earnshaw's theorem, is a kind of passive stable levitation that can be achieved at normal temperatures with no energy input. Appealingly, most seemingly nonmagnetic materials can be levitated in a magnetic field and can stabilize free levitation of magnetic materials. This review focuses on the fundamental principles of magnetic levitation using diamagnetism, with emphasis on its burgeoning applications.The theoretical basis associated with the magnetic levitation using diamagnetism is discussed by elucidating the characteristics of diamagnetic materials, and the key levitation mechanisms are clarified. Afterwards, state-of-the-art applications in various aspects, including sensing and measurement, actuating and micromanipulation, energy harvesting and magnetic gravity compensation, are summarized and compared. Finally, the review concludes with a brief outlook on future perspectives.     

High-performance Multicrystalline Silicon Ingots Assisted by Recycled Multicrystalline Silicon Block Tailing as Seeds

Silicon - Nowadays, casted multicrystalline silicon is the most important material in photovoltaic industry. In order to reduce the cost of silicon ingots, the recycle of silicon ingot tailings is...     

集成行波测距功能的高压输电线路保护装置的技术探讨

以集成行波测距功能的高压线路保护装置为目标,提出了装置的总体硬件架构设计方案和行波测距软件的整体实现方案,并利用线路保护的判别信息提高了行波测距功能的可靠性,在不影响继电保护性能的基础上实现了行波测距功能与保护功能的整体融合,为提高输电线路保护装置的测距性能提供了技术保证,仿真结果验证了该集成技术的可行性。集成了行波测距的线路保护装置能实时精确定位线路故障点,大大减少人工巡线的工作量,缩短了故障修复时间,提高了供电可靠性。     

Catalase (CAT) Gene Family in Rapeseed (Brassica napus L.): Genome-Wide Analysis,Identification, and Expression Pattern in Response to Multiple Hormones and Abiotic Stress Conditions

Catalase (CAT) is an antioxidant enzyme expressed by the CAT gene family and exists in almost all aerobic organisms. Environmental stresses induce the generation of reactive oxygen species (ROS) that eventually hinder plant growth and development. The CAT enzyme translates the hydrogen peroxide (H₂O₂) to water (H₂O) and reduce the ROS levels to shelter the cells’ death. So far, the CAT gene family has not been reported in rapeseed (Brassica napus L.). Therefore, a genome-wide comprehensive analysis was conducted to classify the CAT genes in the rapeseed genome. The current study identified 14 BnCAT genes in the rapeseed genome. Based on phylogenetic and synteny analysis, the BnCATs belong to four groups (Groups I–IV). A gene structure and conserved motif analysis showed that Group I, Group II, and Group IV possess almost the same intron/exon pattern, and an equal number of motifs, while Group III contains diverse structures and contain 15 motifs. By analyzing the cis-elements in the promoters, we identified five hormone-correlated responsive elements and four stress-related responsive elements. Further, six putative bna-miRNAs were also identified, targeting three genes (BnCAT4, BnCAT6, and BnCAT8). Gene ontology (GO) enrichment analysis showed that the BnCAT genes were largely related to cellular organelles, ROS response, stimulus response, stress response, and antioxidant enzymes. Almost 10 BnCAT genes showed higher expression levels in different tissues, i.e., root, leaf, stem, and silique. The expression analysis showed that BnCAT1–BnCAT3 and BnCAT11–BnCAT13 were significantly upregulated by cold, salinity, abscisic acid (ABA), and gibberellic acid (GA) treatment, but not by drought and methyl jasmonate (MeJA). Notably, most of the genes were upregulated by waterlogging stress, except BnCAT6, BnCAT9, and BnCAT10. Our results opened new windows for future investigations and provided insights into the CAT family genes in rapeseed.     

Genome-Wide Analysis of the Late Embryogenesis Abundant (LEA) and Abscisic Acid-, Stress-, and Ripening-Induced (ASR) Gene Superfamily from Canavalia rosea and Their Roles in Salinity/Alkaline and Drought Tolerance

Canavalia rosea (bay bean), distributing in coastal areas or islands in tropical and subtropical regions, is an extremophile halophyte with good adaptability to seawater and drought. Late embryogenesis abundant (LEA) proteins typically accumulate in response to various abiotic stresses, including dehydration, salinity, high temperature, and cold, or during the late stage of seed development. Abscisic acid-, stress-, and ripening-induced (ASR) genes are stress and developmentally regulated plant-specific genes. In this study, we reported the first comprehensive survey of the LEA and ASR gene superfamily in C. rosea. A total of 84 CrLEAs and three CrASRs were identified in C. rosea and classified into nine groups. All CrLEAs and CrASRs harbored the conserved motif for their family proteins. Our results revealed that the CrLEA genes were widely distributed in different chromosomes, and all of the CrLEA/CrASR genes showed wide expression features in different tissues in C. rosea plants. Additionally, we introduced 10 genes from different groups into yeast to assess the functions of the CrLEAs/CrASRs. These results contribute to our understanding of LEA/ASR genes from halophytes and provide robust candidate genes for functional investigations in plant species adapted to extreme environments.