5种银杏速溶茶饮料中茶多酚和黄酮类化合物含量的测定

本文随机选取5种品牌的银杏速溶茶产品,依照GB/T 8313—2018对其中儿茶素含量进行HPLC检测分析,用无水乙醇对5种样品做超声波辅助提取。检测结果发现,5种银杏速溶茶的随机抽样测验均符合目前国家标准茶饮料茶多酚最低含量要求。本文通过参照茶饮料国家标准,在一定程度上分析5款泰州市售银杏茶饮料的品质,给消费者提供了参考。     

一种合理利用峰谷电的智能饮水机设计

为了解决现有饮水机加热装置拆卸困难、冷热水混合危害健康、饮用水二次污染等问题,在国家峰谷电急需平衡的背景下,设计了合理利用峰谷电的单片机控制智能饮水机。它主要包括加热装置、快换结构、热水存储结构、通气孔复位洁净帽结构和单片机控制系统。采用反压式供水加热结构,使加热更充分;加热装置可见,能快速更换即热管;以通气孔复位洁净帽隔离饮水机内部与外界接触,可减少污染物的进入和散热;由电磁阀控制流水方向,彻底隔离冷水和热水,避免阴阳水,提高了饮水质量;带有温度、液位传感器、报警保护功能,可解决用水高峰水量不足、用水低谷反复加热电能浪费问题;通过设定低谷段的时间范围,实现低谷时段加热储水,在合理利用峰谷电的同时为用户节省电费。若推广使用可为国家电网"削峰填谷"优化做出贡献。     

Online reviews as a pacifying decision-making assistant

Drawing on uses and gratification theory, this article elucidates how consumers capitalize on online reviews for purchase decisions in three markets (Taiwan, Thailand, and Vietnam). Three studies demonstrate this objective. Study 1 considers online reviews as a one-dimensional construct consisting of three behavioral components, including textual comments, contextual images, and star ratings, that had been validated by using reliability and validity analyses. Study 2 employs an ANOVA to analyze how these components relate to different consumer groups in terms of gender, age, and location. Study 3 explores the mediating role of online trust in the online reviews and purchase decision relationship under the moderating effect of the perceived effectiveness of social media platforms. Using a cross-national survey and a two-stage partial least squares analysis, the authors substantiate the proposed relationships and discuss the theoretical and managerial contributions of this research.