食品中脱氢乙酸的测定

目的:用液相色谱法对不同食品中脱氢乙酸的测定进行验证。方法:经50 g·L-1氢氧化钠溶液调样品pH提取脱氢乙酸,经离心、过柱净化、洗脱、过膜,用紫外检测器测定样品中的脱氢乙酸。结果:标准曲线有良好的线性关系(R2=1),最低检出浓度为0.44μg·mL-1,测定样品的相对标准偏差为2.65%~8.36%,加标回收率为79.2%~111.2%。结论:该方法操作简单,检测灵敏度高,干扰少,结果准确。     

Merger Simulation in the Presence of Large Choice Sets and Consumer Stockpiling: The Case of the Bottled Juice Industry

We simulate the price effects of several hypothetical mergers in the shelf-stable bottled juice industry. In doing so, we highlight the effects of consumer stockpiling on demand elasticity estimates and subsequent merger simulations. This task is complicated by a large number of choice alternatives within the bottled juice category. To address this challenge we employ a demand model based on the Distance Metric (DM) approach of Pinkse et al. (Econometrica 70:1111–1153, 2002). We find that merger simulations that do not account for consumer stockpiling behavior underestimate the permanent price changes that are likely to occur due to a merger.      

建立赣南脐橙冷链电子商务供应链分析

在全国各地物流中心纷纷转型的形势下．通过对赣南脐橙物流现状的分析．探讨如何将冷链物流供应链与电子商务理论应用到赣南脐橙国际物流中心的建设与发展之中．从而建立连接零售终端和脐橙农户的完善脐橙供应链系统。并通过系统的整合作用充分发挥脐橙物流中心的营销作用,打造成为具有高度社会责任的企业组织,实现零售终端与脐橙农户的双盈利以及企业的长远发展。     

An Empirical Analysis of Apple Juice Industry of Shaanxi Province in China

The paper analyses the situation of international competitiveness and the comparative advantage of apple juice industry of Shaanxi province. It concludes that apple juice industry of Shaanxi province is characterized by abundant natural resources, cheap labor forces, inefficiency of production, small scales, low growth rate in exporting, low prices in exporting and no famous brand. So, the apple juice industry is faced with challenge and opportunity. Based on this, it puts forward such policies as cultivating new type of apples, establishing the bases, making innovation by the help of institutes and universities, actively implementing authentication and setting up supervision system, and finding a worldwide partner so as to increase international competitiveness of apple juice industry of Shaanxi province.     

桔皮中黄酮类化合物的提取方法研究

采用单因素实验和正交试验方法,以桔皮中黄酮类化合物的收率为考察指标,对影响桔皮中黄酮类化合物提取方法的因素进行了探讨,并测定了桔皮中黄酮的含量。结果表明:浸提温度为70℃,乙醇浓度为70%(体积分数),提取时间为2 h,物料质量比为1∶40为最佳提取条件;在确定的最佳提取条件下,黄酮收率为1.68%。     

The Effect of Extrinsic Product Attributes of Pineapple Juice on Consumer Intention to Purchase

This study aimed to investigate the extent to which consumer information concerning several attributes of the pineapple juice packaging, including the manufacturing process, influenced the consumer intention to purchase. It is suggested that high-pressure technology retains nutrients as vitamins and keeps sensory attributes closer to those of fresh foods. These advantages meet the increasing consumer demand for healthy products and a more differentiated food assortment. However, the benefits provided by these products are not always communicated to consumers. Although information about the technology (high-pressure) had been positively considered by consumers when fruit juice consumption was taken into account, fewer studies have focused on this aspect. The effect of 5 attributes of the package (information on manufacturing process, product definition, production information, price, and brand name) on the pineapple juice consumer intention to purchase was investigated by 96 fruit juice consumers. Information about technology (high-pressure) positively contributed to the consumer pineapple juice intention to purchase and showed to be essential when it is applied on pineapple juice production, being a useful approach when adequately communicated to consumers.     

中国苹果汁国际市场的开发

2003年苹果汁国际市场发展前景稳定,我国苹果汁生产继续保持强劲的增长势头;但我国苹果出口增量不增收;面对国外的反倾销要以积极的心态对待,并运用法律武器和国际贸易规则促进自身的发展。     

赣南脐橙三位一体营销战略探讨

面对日益激烈的市场竞争,针对脐橙上市期过短、上市过于集中、脐橙生产组织化程度低,以及自然灾害和突发事件频仍的情况,赣州市积极发挥政府的引导作用,同时积极利用市场调节功能,制定三位一体的营销战略,充分发挥果农、营销企业和合作社的积极性,使赣南脐橙营销具有较强的竞争力,较好地反映了果农、营销公司和政府的利益诉求。本文在叙述三位一体营销战略运行的基础上,对强化这一战略进行了一些积极的探索。     

The cross-price effect on willingness-to-pay estimates in open-ended contingent valuation

Previous literature has shown that potential buyers use a reference price or product to form their opinion about the value of a new product. Therefore, the pricing decision is an interactive process. We investigate the two generalizations of the cross-price effect (the neighborhood price effect and the asymmetric price effect) on consumer willingness-to-pay (WTP) for multiple similar products in an open-ended contingent valuation context. Results show that the cross-price effect on WTP is prominent, with the neighborhood price effect holding in contingent valuation. No conclusions are reached about the asymmetric price effect.     

An Empirical Investigation of Consumer Concerns About Nutrition,Taste, Price and Chemical Additives During Meat Shopping

Abstract

This study revealed that one third of the consumers considered their meat being free from chemical additives as the most beneficial factor when they shopped for meat, comparing to nutritional value, taste of meat, and price of meat. About 20 percent of the consumers expressed the same concern about nutritional value, taste or price, respectively. Furthermore, consumers' demographic and socioeconomic characteristics influenced their concerns about chemical additives, nutrition, taste and price.