Adsorption mechanism of non‐toxic organic inhibitors on steel in solutions at pH 8 determined by electrochemical quartz crystal microbalance measurements

The adsorption on steel of two compounds, ascorbic acid salts (SA) and 1‐hydroxyethylidene,1‐diphosphonic acid salts (SHEDP), used alone or simultaneously, was studied using an electrochemical quartz crystal microbalance (EQCM). These products are considered to be non‐toxic organic corrosion inhibitors. SA adsorption was greater at cathodic potentials than at the corrosion potential, while SHEDP adsorbed better at the corrosion potential. The effectiveness of these two inhibitors is discussed in relation to the polarization curves. Several hypotheses are discussed to explain the adsorption mechanism in the presence of the two compounds used either alone or together.     

苏秦散文中的历史意识——苏秦思想研究系列论文之二

《战国纵横家书》和《史记》、《战国策》里的苏秦说辞，共同体现了苏秦极为浓厚的时代意识和强烈的历史使命感，如突破传统的选取精神、复归一统的历史意识和重视外交的“安民”思想、辨证色彩的矛盾分析方法和系统辨证的战争观。这些独特的思想内容，将在国家政治、军事、外交以至社会经济生活的各方面产生特有的影响，应该予以重视。     

共焦激光眼底造影及其在眼科的应用

共焦激光技术可以记录眼底视网膜、脉络膜血管状况,并造影成像。本文介绍共焦激光眼底造影设备的组成、工作原理、特点及其在眼科的临床应用。     

男性针织内裤的裆型研究

通过实验对比，确定了男士象鼻裤裆部的象鼻弯度r值，提出了解决“吊裆”问题的两种方法：一片式连裁法和后中加量法。     

充分利用生态资源,优化组织滨水地区蓝、绿、红线

蓝、绿、红线是滨水地区三种主要的控制线,在我国城市水滨开发中往往呈现三线平行带状设置的布局模式.它越来越不能满足城市核心滨水地区多元化发展,水资源多样化利用的趋势.运用城市设计方法,探讨了适应不同滨水地区建设目标的优化组织方式,并提出了对蓝、绿、红线进行综合组织的实施对策.     

氧化钴原料中主含量的测定

采用以盐酸溶样制备试液 ,孔雀石绿为衬托 ,二甲酚橙为指示剂的EDTA容量法测定氧化钴主含量。此方法与其它方法相比具有终点易判断、变色敏锐、快速、准确度及精密度高等优点     

Equilibrium moisture content, BET monolayer moisture and crispness of extruded rice-legume snacks

Extruded Jaya rice-legume (3:1 w/w) snacks equilibrated at different relative humidities (RH; 10–86%) exhibited similar typical sorption-isotherms and equilibrium moisture contents (EMC) up to 33% RH. Acceptable crispness was lost above 43% equilibrium relative humidity (ERH) and about 110N breaking strength. The values for the BET monolayer moisture content of various products were almost identical to their initial moisture content, indicating the adequacy of the processing conditions for snacks of satisfactory shelf-life if packed immediately in moisture-impermeable packets.     

A study on the sorption of NO3− and F− on the carboxymethylated starch‐based hydrogels loaded with Fe2+ ions

Using the principle of geochemistry of fluoride, green and cost effective anion adsorbents were developed for the removal of F^? from water systems. The scheme was further applied for the removal of NO₃^? also. Carboxymethylated starch functionalized through network formation with acrylamide was used as adsorbent, and the resultant hydrogels were loaded with Fe²⁺ ions to generate anchorage for the anions. Sorption of Fe²⁺ was studied as a function of different factors such as time, temperature, pH, and ion strength. The network having the highest Fe²⁺ uptake was loaded with the Fe²⁺ ions under optimum conditions and used for the sorption of F^? and NO₃^?. High efficiency has been observed for F^?, as even up to 100% uptake has been observed within just 10 minutes. The support shows high selectivity for NO₃^?, which was used as anion reference. Thermodynamics of sorption confirms low order and low energy processes. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2007     

陶瓷墙地砖坯体强度分析和强度影响因素及坯体压制特征探讨

根据力学理论综合分析了墙地砖坯体强度的形成机理及影响坯体强度的因素,如层裂、含湿度、致密度等.并对坯体强度与致密度;致密度与压制力及坯料之间的关系以及层裂对强度的影响进行了简要的分析.最后对满足坯体强度压制特征作了初步探讨.     

One‐component polyurethane adhesives for green wood gluing: Structure and temperature‐dependent creep

Creep and temperature‐dependent creep, characteristic of one‐component polyurethane adhesives for wet and green structural wood gluing are two different parameters. Testing of standards‐approved commercial polyurethane adhesives for this purpose shows that while ambient temperature creep can be avoided or at least greatly limited according to the formulation used, this is not the case for temperature‐dependent creep. The commercial adhesive formulation characteristics that minimize or enhance ambient temperature and temperature‐dependent creep are identified. Basic principles on the structure of simple polyurethane adhesives influencing temperature‐dependent creep are also identified and discussed. The higher the proportion of all hardened network nodes, the lower creep is likely to be at ambient temperature. Instead, due to segment movement and easier disentanglement with increasing temperature, the lower the proportion of covalently linked nodes and the greater the proportion of just physical entanglement nodes, the greater the temperature‐dependent creep will be. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 96: 1231–1243, 2005