30%毒·灭乳油(顽虫净)高效液相色谱分析

采用反相高效液相色谱法 ,以甲醇 +水 =70 +30 (v/v)为流动相 ,用紫外检测器对毒死蜱·灭多威乳油进行分离和测定。结果表明 :毒死蜱和灭多威含量测定的精密度标准偏差分别为0 0 7和 0 0 5 ;变异系数分别为 0 35 %和 0 5 0 % ,回收率分别为 98 99%～ 10 1 0 2 %和 99 6 4%～10 1 95 % ,线性相关系数分别为 0 9999和 0 9996。     

对欧盟压力设备指令97/23/EC中危险品分类的诠释

欧盟97/23/EC压力设备指令中压力设备的分类与介质危险性有关.按照97/23/EC,将爆炸性、易燃性、氧化性与毒性介质列为危险介质,本文根据97/23/EC以及67/548EEC等欧盟指令对压力设备中危险介质的分类及其定义,判据进行了阐明,对我国压力容器和压力管道中危险介质的划分及分类将有很大的参考价值.     

合成杀藻剂先导化合物的筛选和杀藻效果分析

从大量合成化合物中筛选出一种微囊藻杀藻荆的先导化合物MS1,当MS1的浓度≥1 mg·L-1时,3 d内使铜绿微囊藻(Microcystis aeruginosa)DS的细胞密度降低90%;MS1对铜绿微囊藻DS、7806、7820生长抑制率的72 h-EC50均小于0.25 mg·L-1,表明其对微囊藻杀灭活性高.而MS1对水华鱼腥藻(Anabaena flosaquae)7120、纤细裸藻(Euglena gracilis)、莱因衣藻(Chlamydomonas reinhardtii)、舟型藻(Navicula pelliculosa)、斜生栅藻(Scenedesmusobliquu)生长抑制率的72 h-EC50分别为12.76 mg·L-1、32.3 mg·L-1、3.13 mg·L-1、10.17 mg·L-1和22.4 mg·L-1,表明这几种藻对MS1的敏感程度相对较低,即MS1的专一性较强.MS1对浮游动物大型溞(Daphnia magna)和淡水鱼青鳉(Oryzias latipes)死亡率的72 h-LC50分别为1.33 mg·L-1和1.04 mg·L-1,表明此杀藻剂先导化合物对浮游动物和鱼类的毒性偏大.通过对MS1基团的修饰可降低其环境残留期及对非靶标的毒性,通过此先导化合物合成的杀藻剂,适用于景现水体和工业水处理的杀藻.     

儿茶酚–(胺)表面化学介导的一氧化氮催化释放涂层研究

目的 在316L不锈钢(SS)表面构建原位一氧化氮(NO)催化释放涂层,使其能特异选择性地抗凝血、抑制平滑肌细胞(SMCs)增生,从而促进内皮细胞(ECs)生长。方法 在弱碱性水溶液中,选用多巴胺(DA)和己二胺(HD)为前驱体,利用多巴胺邻二苯酚结构自聚合沉膜的能力、多巴胺与己二胺的酚–(胺)表面化学,通过简单的一锅法在316L SS表面构建富氨基粘附涂层DA/HD。再通过碳二亚胺化学交联反应,共价接枝螯合Cu²⁺的1,4,7,10–四氮杂环十二烷–1,4,7,10–四羧酸(DOTA),最后获得均匀且稳定的NO催化释放涂层(命名为Cu-DOTA@DA/HD)。结果 DA/HD涂层表面的氨基密度高达22 nmol/cm²,实现了Cu-DOTA的有效固定,其NO催化释放速率可达5.2×10^–10 mol/(cm²·min)。Cu-DOTA@DA/HD涂层显著地抑制了血小板的粘附和激活,也能有效抑制血栓的形成,其表面血栓总质量由316L SS的(40.3±10.3) mg降低至(3.0±0.4) mg。...     

浅谈对传统农药制剂乳油的改进研究

乳油是农药的四大剂型之一,由其发展而来的新剂型日益增多,本文从概念、性质和特点等方面介绍了其中最为突出的三个剂型:微乳剂、水乳剂和固态乳油。     

Feature extraction and soft computing methods for aerospace structure defect classification

This study concerns the effectiveness of several techniques and methods of signals processing and data interpretation for the diagnosis of aerospace structure defects. This is done by applying different known feature extraction methods, in addition to a new CBIR-based one; and some soft computing techniques including a recent HPC parallel implementation of the U-BRAIN learning algorithm on Non Destructive Testing data. The performance of the resulting detection systems are measured in terms of Accuracy, Sensitivity, Specificity, and Precision. Their effectiveness is evaluated by the Matthews correlation, the Area Under Curve (AUC), and the F-Measure. Several experiments are performed on a standard dataset of eddy current signal samples for aircraft structures. Our experimental results evidence that the key to a successful defect classifier is the feature extraction method – namely the novel CBIR-based one outperforms all the competitors – and they illustrate the greater effectiveness of the U-BRAIN algorithm and the MLP neural network among the soft computing methods in this kind of application.     

~（99m）Tc－EC的动物研究及初步临床评价

研究显示了９９ｍＴｃ－ＥＣ的化学量对小鼠肾放射量浓聚有很大的影响，只有当鼠接受１．２５ｍｇ／ｋｇ剂量时肾的放射量最高．肾／肝达３．２。它的小鼠毒性和与血浆蛋白的结合率均低．１４例健康志愿者肾显像表明９９ｍＴｃ－ＥＣ是一种有用的锝标记肾功能显像剂．     

CAutoCSD – Evolutionary Search and Optimisation Enabled Computer Automated Control System Design

This paper attempts to set a unified scene for various linear time-invariant (LTI) control system design schemes, by transforming the existing concept of "computer-aided control system design" (CACSD) to novel "computer-automated control system design" (CAutoCSD). The first step towards this goal is to accommodate, under practical constraints, various design objectives that are desirable in both time and frequency domains. Such performance-prioritised unification is aimed at relieving practising engineers from having to select a particular control scheme and from sacrificing certain performance goals resulting from pre-commitment to such schemes. With recent progress in evolutionary computing based extra-numeric, multi-criterion search and optimisation techniques, such unification of LTI control schemes becomes feasible, analytical and practical, and the resultant designs can be creative. The techniques developed are applied to, and illustrated by, three design problems. The unified approach automatically provides an integrator for zero-steady state error in velocity control of a DC motor, and meets multiple objectives in the design of an LTI controller for a non-minimum phase plant and offers a high-performance LTI controller network for a non-linear chemical process.     

汽车电子商务与企业ERP的整合

作为汽车企业信息系统主体的制造资源计划MRP-Ⅱ/ERP系统应该与电子商务有机结合起来,充分利用互联网络技术,将供需链管理、客户关系管理、电子商务、办公业务等功能全面集成,形成资源共享、数据共享,适应网络经济的充分柔性的汽车企业管理信息系统.     

Reinforced masonry beams under shear load – Proposals for future designs / Bewehrte schubbeanspruchte Mauerwerksbalken – Vorschläge für zukünftige Bemessungen

This article is written against the backdrop of the work of the European standardisation committees on the amendment of EN 1996‐1‐1 [N 4] which will also exert an influence on the design of reinforced masonry in Germany. This paper focusses on the design approaches of DIN EN 1996‐1‐1 for untensioned reinforced masonry beams under shear load in the ultimate limit state (ULS). Proposals are made to discuss their revision. The contents of E DIN 1053‐3 [N 3] and of the final draft of the guideline ”Flat Lintels” [7] are taken into account.