塑料泡沫和陶瓷泡沫结构的边长测量表征法

确立了正十二面体为塑料泡沫的单胞结构模型;以边长b为参量推导出模型中各几何量的表达式;对一组给定的b值,计算了几何模型和塑料泡沫单胞尺寸、窗口尺寸的理论值和"真实"值;分析了图像测量结果和计算所得"真实"值间存在的差异及其来源,由此导出模仿计算图像测量值或者把图像测量值转换为"真实"值(反之亦然)的方法, 模仿计算的图像测量值与实际图像测量结果有满意的一致性.边长b是两个相邻节点间的距离,理论上具有唯一性,特别容易确认,不一定需要复杂的设备和专门的技术人员,很少因操作人员识别和选择的任意性或者因图像的"失真"给测量结果带来偏差,计算的结果真实可靠.这种表征方法不仅适用于塑料泡沫,也可用于陶瓷泡沫的表征.     

间歇冶炼工艺烟气制酸装置的设计

对间歇冶炼工艺烟气制酸装置的设计和操作进行了论述。为解决气体流量和SO_2浓度的波动问题,确保硫酸装置稳定运行,提出了各种解决方案,其中包括增设焚硫炉或预干燥塔、注入液体SO_2、采用一转一吸装置加尾气洗涤塔等。     

Studies on Turpentine-Like Off-Odor in Cola

A turpentine-like off-odor and unusual taste development can occur in some colas held to the end of their normal shelf-life and stored at temperatures of 20°C and warmer. Extended storages (up to 8 wk) at 20° or 40°C under fluorescent or ultraviolet light have been conducted on colas bottled with closures containing different liner materials. Results suggest off-odor development is due to excess p-cymene in the cola. The p-cymene appeared to be a product of the dehydrogenation of γ-terpinene and limonene with titanium dioxide (TiO₂) in the ethylene vinyl acetate (EVA) white liner acting as a catalyst. Butylated hydroxytoluene (BHT) at levels of about 750 ppm greatly reduced this reaction.