Fe-Cr纤维提取工艺与磁性研究

为解决Fe-Cr纤维提取过程中容易造成空气污染的问题,使得到的纤维具有较高的磁学性能,采用化学萃取法腐蚀掉Cu-13Fe-2Cr原位复合材料中的铜基体,制备了Fe-Cr金属纤维;通过调整硝酸与双氧水比例抑制NO2的产生;通过改变清洗方式使纤维具有较高的磁性。用SEM进行了形貌观察和成分能谱分析,用振动样品磁强计VSM作出了纤维的磁滞回线。结果表明,NO2被成功抑制,纤维的比饱和磁化强度保持在150 A.m2.kg-1左右。     

粮食加工企业电机常见故障分析与维修方法

分析了粮食企业常见电动机故障类型,介绍了一些电机故障的诊断方法和维修措施.     

商贸流通服务业影响力政策分析

重新认识和充分发挥商贸流通服务业的影响力已成为新世纪国内外关注的重大前沿问题,更是践行科学发展观、转变发展方式、落实中央一系列战略意图的全局性问题。商贸流通服务业影响力是商贸流通服务业直接贡献和间接贡献(外溢效应或外部性)的总称。以往商贸流通服务业影响力被低估,与忽视其溢出效应有直接关系。商贸流通服务业的外溢效应对于提高国民经济运行质量、优化国民经济流程、调整国民经济结构、扩大国内需求、增进社会总福利等全局性的潜移默化的影响能力,可能远远大于它所提供的直接贡献,低估这种外溢效应是长期以"来重生产、轻流通"的真正原因之一。     

河北省专业外贸公司战略转型研究

本文认为,外贸企业有三种转型战略:一是实业化和多元化投资战略;二是中小制造业集群的出口中间商和虚拟经营战略;三是多元化贸易平台战略。而要真正实现转型,首先,要进一步调整产权结构,建立现代化的公司治理结构,实施有效的激励措施。其次,要实施组织变革,建立与公司发展相适应的现代化企业组织。再次,要加强信息化建设,实施业务流程再造,完善基于网络平台的信息管理系统和电子商务。     

一种混凝土脱模专用蜡的研制

本产品以采用石蜡为主要原料,通过调合工艺制得用于混凝土脱模的特种专用蜡.论述了复合溶剂、复合添加剂、助溶剂等对脱模蜡性能的影响.产品经过用户使用达到了进口产品质量要求,满足了用户需要.     

国内外己内酰胺生产技术发展概况

本文对国内外己内酰胺生产技术现状、发展动向、以及市场供需状况作了概要叙述.     

Profiling consumers in home ware stores according to their decision‐making process: an exploratory study

Despite the growing interest of South African consumers regarding home ware, insufficient research is available regarding their decision making of this product category. The objectives of this exploratory study were to evaluate consumers' decision‐making process regarding home ware, and to suggest consumer profiles of the home ware based on the decision‐making process. A qualitative research strategy was used to purposively recruit both male and female participants walking around a home ware store. Semi‐structured interviews were used to collect data from 33 participants at which point data saturation was reached. Each step of the decision‐making process was investigated during the interviews, using questions relevant to the purchasing of home ware. The results indicated clear differences as well as similarities in home ware consumers' decision‐making process. It was evident that the decision‐making process was a result of their specific need for a home ware product. Consumers evaluated home ware based on their needs, values and personal style, while making their final product choice based on product quality, appearance and price. It was also possible to identify home ware consumer profiles based on an evaluation of their decision‐making process. Four profiles were identified, namely, the quality‐conscious, the fashion‐conscious, the lifestyle‐orientated and the impulsive home ware consumer. The characteristics associated with each profile should provide the growing home ware market with insight regarding the specific needs and preferences of the consumer. Seeing that this study was only exploratory in nature, it is recommended that further research regarding the purchasing of home ware should be done.     

气相色谱法测定水果、蔬菜中多种拟除虫菊酯类农药残留

【目的】建立快速、准确测定水果、蔬菜中4种拟除虫菊酯类农药残留量的方法。【方法】微波加速反应系统提取农药残留,固相萃取（SPE）柱净化,毛细管柱气相色谱法-μECD检测器测定。【结果】可同时分离检测4种拟除虫菊酯类农药残留,检出限均可达到0．00μg／mL,甲氰菊酯在0．001-5μg／mL范围内、其他3种菊酯在0．001～10μg/mL范围内线性关系良好,相关系数r〉0．9990;回收率为76．2％-105．9％,相对标准偏差为3．4％-12．0％。【结论】本方法灵敏度高、净化效果好、节省时间。     

反相高效液相色谱“蓝色素”快速检测方法研究

本研究采用反相高效液相色谱法,系统研究了蓝色素的分离提取方法,确定了蓝色素测定的色谱条件,在此基础上进行了色谱测定的方法学研究,明确了蓝色素的线性范围、精密度及回收率,建立了最佳的定量方法。     

食品包装材料中邻苯二甲酸酯增塑剂残留的检测

针对食品包装材料中邻苯二甲酸酯（PAEs）增塑剂残留,采用加速溶剂萃取（ASE）和GC／MS联用技术分析5种PAEs（DMP,DEP,DBP,BBP,DEHP）,结果表明加速溶剂萃取用于食品包装材料中PAEs的提取,最佳温度条件为120℃,最佳循环次数为3次。方法检出限达到0．1mg／kg．回收率达到95．5％-99．8％;并且具有很好的重现性和精密度。