紫甘薯豆浆复合饮料加工技术研究

实验以黄豆和紫薯为主要原料,通过单因素与正交试验制作新型复合饮料。实验确定了影响紫甘薯豆浆复合饮料感官品质的主次因素,即：紫甘薯浆与豆浆的比〉CMC—Na用量〉加糖量〉柠檬酸用量;紫甘薯豆浆复合饮料的最佳配方为：紫甘薯浆与豆浆的复合比例为80（g）：20（g）,加糖量为7％,柠檬酸为0．15％,CMC—Na为0．2％。制成的复合饮料是一种色泽自然、风味宜人、具有营养保健功能的食品,具有一定的市场发展潜力。     

Product,Environmental, and Service Attributes That Influence Consumer Attitudes and Purchases at Wineries

Abstract

Direct sales of wine and winery souvenirs to winery visitors is important in a number of regions throughout the United States and around the world. The attributes that influence winery visitors' beliefs can have a significant impact upon wine purchases, repeat visits, positive word-of-mouth comments, and upon future purchases at restaurants and other retail outlets. A study of winery visitors found four underlying factors from a list of 17 attributes. Regression results indicated that several wine, environment, and service attributes have a significant impact upon consumer attitudes and purchases. Product and purchase involvement were also found to impact purchase behavior.     

Threshold Cointegration in the Greek Milk Market

This article investigates the nonlinear adjustment between consumer and producer prices in the Greek milk sector using a threshold error correction autoregressive model. The results reject the null hypothesis of linear cointegration in favor of a 2-regime threshold cointegration model. A cointegrating relationship is expected only when equilibrium consumer price is decreased more than 24.12% or the equilibrium relative markup is squeezed more than 62.74%. In this case consumer prices have to increase faster than producer prices to restore the long-run equilibrium between consumer-producer milk prices.     

Identifying significant characteristics of organic milk consumers: a CART analysis of an artefactual field experiment

The organic dairy category is one of the fastest growing categories of organic foods in the US. Organic milk consumers generally cite perceived health benefits and lower risk of food contamination, as well as perceived superior quality and environmental sustainability of organic farming methods, as the major motivations for preference of organic over conventional milk. While the attributes of organic milk that are valued by consumers are fairly well-known, more ambiguity exists regarding the demographic characteristics of the typical organic milk consumer. This research makes use of experimental data from 148 adult participants and use a Classification and Regression Tree (CART) analysis, a nonparametric modelling approach, to identify how Willingness-to-Pay (WTP) for organic milk varies with the demographic profile of experiment participants. The study finds that perceived taste of organic milk, concern for the risk of consuming conventional milk, being a primary shopper, and the quantity of milk consumed are the major factors that separate experiment participants into groups with high and low WTP for organic milk.     

Understanding Heterogeneous Consumer Preferences in Chinese Milk Markets: A Latent Class Approach

We examine heterogeneous consumer preferences in Chinese milk markets. Using a discrete choice experiment, we examine how the brand, quality certification, traceability label and price influence consumers' milk choices. We identify four consumer segments using a latent class model: price conscious (9.8%), balanced thinking (19.8%), health conscious (57.5%), and environment conscious (12.9%) consumers. These four segments have distinct preferences: price conscious consumers prefer green certification; balanced thinking consumers have the highest willingness to pay for traceability labels; health conscious consumers have strong brand awareness; and environment conscious consumers prefer organic certification and traceability labels and use price as a quality signal. Such diversity of consumer preference can be explained by four psychological factors: price consciousness, food safety concerns, health consciousness and environmental concerns.     

Do subsidies cause a less competitive milk market in China?

After 2008, China dairy industry has experienced a consolidation supported by the government mainly for the reason of food safety. Subsidies are one of the tools to shape a concentrated market with goals of reducing regulation cost and accomplishing quality control. This gives a serious concern that subsidies would generate a less competitive dairy industry. We construct a parametric model and use the firm‐level panel data, specifically the top eight dairy firms, to test if government subsidies strengthen the market power in the dairy industry. Our empirical results indicate government subsidies have a negative impact on the Lerner index for the top privately owned firms, but no significant effect on state‐controlled ones after controlling for advertising, time trend, and proprietorship. It is possible that the subsidies give more room for private firms to increase the scale or suppress the price, which eventually reduces the market power and benefits dairy customers in the downstream.     

Consumer preference among fluid milks: low‐fat vs. high‐fat milk consumption in the United States

The present study uses data from the Continuing Survey of Food Intakes by Individuals 1994–1996, 1998 in order to analyse milk consumption by type, specifically high‐fat milk vs. low‐fat milk. Whereas trend analysis displays an overall increase in low‐fat milk consumption over the last few decades in the United States, a number of individuals still consume high‐fat milk varieties, and overall dietary intakes have yet to achieve recommended levels. In light of recent research regarding fat intakes, it is important to understand what factors might cause consumers to purchase high‐fat options given the number of low‐fat options available in the market. Through the use of Logistic regression, key socio‐economic and demographic variables are analysed in order to determine their impacts on the probability of consuming low‐fat milk vs. high‐fat milk. The results indicate that a number of factors do influence probability of low‐fat milk consumption as compared with high‐fat milk consumption. Most notably, probability of low‐fat milk consumption appears to be positively related to age, education level, and income level. African Americans and other minorities had a lower probability of consuming low‐fat milk when compared with White people in the sample population. Also, those respondents designated as low income or living in the South were less likely to consume low‐fat milk.     

测定婴幼儿配方乳粉中酪蛋白磷酸肽(CPP)样品前处理方法的优化

本文对婴幼儿配方乳粉中酪蛋白磷酸肽的影响因素进行分析,对婴幼儿配方乳粉样品测定酪蛋白磷酸肽的前处理中去除蛋白的步骤进行优化,采用紫外检测器分析.结果表明,采用IC-RP柱、C18色谱柱可得到良好的分离效果,酪蛋白磷酸肽在20～200μg·mL-1线性关系良好,相关系数R为0.999723,检出限为4 mg/100 g,回收率为95.6％～100％,相对标准偏差为4.06％.该方法前处理操作简单,具有良好的重现性和准确性,适用于婴幼儿配方乳粉中酪蛋白磷酸肽含量的测定.     

我国奶源基地建设中存在的问题及对策探讨

奶源基地建设是我国奶业发展的基础,提高乳品质量需从源头抓起。我国奶源基地建设中存在奶牛饲养规模小、管理落后、产加销经营一体化水平低、社会化服务体系不健全等问题。借鉴发达国家奶源生产的有益经验,提出加强我国奶源基地建设的对策和建议。