消费者对可追溯牛肉的认知及其影响因素分析——基于结构方程模型

利用针对北京市城区消费者的402份调查问卷数据,运用结构方程模型,分析了消费者对可追溯牛肉的认知及其影响因素。结果显示,消费者对可追溯牛肉的认知水平较低,但消费者在信息强化后对可追溯牛肉安全性的评价较高;信息搜集和经济文化因素显著影响消费者对可追溯牛肉的认知水平,风险感知、牛肉重要性和经济文化因素显著影响消费者对可追溯牛肉的认知内容,但认知水平并不显著影响认知内容。最后提出相关对策建议。     

LAL／GNB法筛选辐照鸡肉的应用研究

【目的】探讨内毒素检测（LAL）与革兰氏阴性菌计数（GNB）相结合的方法应用于辐照鸡肉的筛选的可能性。【方法】市售鸡肉丁以50g每份分装后,以γ射线进行辐照处理,剂量分别为0kGy、2kGy、6kGy,每个剂量各12份,通过革兰氏阴性菌的培养计数估计样品中存在的活的革兰氏阴性菌的量,通过内毒素浓度定量估计活的和死亡的革兰氏阴性菌总量,比较两者差异来判定是否经过辐照处理。[结果】辐照剂量为6kGy时,12个样品被检测出经过辐照处理。辐照剂量为2kGy时,8个样品被检测出经过辐照处理,4个样品检测出未经过辐照处理。辐照剂量为0kGy时,12个样品检测结果均为未经过辐照处理。【结论】LAL／GNB法可以应用干辐照鸡肉的筛选。     

西餐牛肉类初加工与食品安全控制分析

牛肉是西餐主要的食材之一.本文通过对牛肉的初加工技术进行分析,探究对西餐牛肉类进行食品安全控制的措施,以提高牛肉类产品的整体质量,使西餐牛肉类产品能够达到我国食品安全的标准.     

Impacts of Declining U.S. Retail Beef Demand on Farm-Level Beef Prices and Production

A systems model was estimated to determine the effects of declining U.S. retail beef demand on farm-level beef prices and production. Retail beef demand declined by nearly 66% from 1976 to 1999. Results indicate autonomous shifts in retail demand significantly impacted farm-level demands and production. Based on equilibrium multipliers, the 1976–99 reduction in beef demand decreased real slaughter cattle prices and production by 32.1% and 11.2%, respectively. Real feeder cattle prices and production decreased by 8.0% and 22.6%, respectively. Combining the decreases in farm prices and production, slaughter and feeder cattle producers experienced a real revenue reduction of $13.3 billion (61%) due to the long-term decline in demand.     

Editorial

An Almost Ideal Demand System (AIDS) was utilized to model the United States demand for domestic and imported tobaccos. The model, which includes equations for domestic flue-cured tobacco, domestic air-cured (burley) tobacco, oriental tobacco, and imported flue-cured and burley tobacco, incorporates the impact of economic factors as well as changes in consumer tastes. In this model homogeneity was rejected under certain conditions, but symmetry could not be rejected. These results suggest that imported flue-cured and burley tobacco, to a limited extent, is a substitute for domestic flue-cured tobacco and is a complement for domestic air-cured tobacco. The trend toward lower average nicotine content of domestic cigarettes is shown to have a detrimenta1 effect on the demand for domestic flue-cured tobacco, but a beneficial impact on domestic air-cured (burley), and imported oriental tobaccos.     

Ultrasound technology for better beef price

Sluggish growth in per capita consumption and a downward pressure on beef price at the farm level has required producers to raise cattle that precisely target the meat attributes desired by consumers. Coupled with the consumers' preference for beef with lean tissue and less external fat, the beef packing plants have used the dualistic grading system that emphasizes leanness and palatability; both important to carcass prices. Ultrasound technology can help farmers to produce a carcass with an optimal mix of attributes such as marbling and muscling, and external fat. The results of this study show a high level of accuracy of ultrasound technology in predicting carcass attributes. An estimated hedonic regression model shows that the carcass attributes are reflected on the implicit beef price. Ultrasound technology helps producers to produce carcass with the desired attributes and thus obtain a higher price.     

Analysis on Affecting Factors of the Growth of Dairy Industry and Beef Cattle Industry in Inner Mongolia

Dairy industry and beef cattle industry are closely connected with livestock husbandries which all depend on the development of livestock husbandry. Inner Mongolia is famous for its livestock husbandry and dairy industry has grown into one with a competitive edge across the country but beef cattle industry cannot be match dairy industry as we haven＇t formed a complete industry chain from the breed of beef cattle chosen, improved, raised, processed to the consumption market and every internal part of industry is separate, unable to give fuller play to its resource superiority and to turn resource superiority into that of competition. So we need make a comparison and analysis of dairy industry and beef cattle industry of Inner Mongolia so as to find out the main factors that prevent the growth of resource-oriented industry, to push the rapid growing of beef cattle industry forward and maintain the dominant position of dairy industry.