气相色谱法在蔬菜中农药残留检测的实验研究

目的:了解气相色谱法在蔬菜农药残留检测中的应用情况.方法:文章依据随机抽样原则抽取5份样品,将样品切碎后匀浆粉碎,并经超声提取处理.利用HP-5弹性石英毛细管柱,测定了样品中残留的有机磷农药、氨基甲酸酯农药含量.结果:在0.01～1.00μg·mL-1加标浓度下,有机磷农药具有良好的线性关系,回收率为85.0％～100...     

基于QuEChERS方法检测蔬菜和水果中农药残留的质量控制分析

本文阐述了质量控制在蔬菜和水果的农药残留检测中的重要性,并基于QuEChERS方法从样品采集、样品制备、样品运输、提取净化和仪器测定等关键步骤提出了质量控制措施,为果蔬农药残留检测的完善和发展提供参考。     

蔬菜农药残留检测中质量控制的要点研究

近年来食品安全问题尤其是蔬菜中的农药残留问题,得到了社会的普遍关注。为了确保人们购买到安全放心的蔬菜,就要对蔬菜中的农药残留量进行科学合理的检测,但是在实际的检测过程中,其检测结果会受到多种因素的影响。本文对蔬菜农药残留检测的误差来源进行分析,并在此基础上,提出了具有一定针对性的检测质量控制要点,有助于获取良好的检测精度,对从事相关检测工作的技术人员具有一定的借鉴意义。     

Small producers,supermarkets, and the role of intermediaries in Turkey's fresh fruit and vegetable market

A wide range of empirical studies show the extent to which the rise of supermarkets in developing countries transforms domestic marketing channels. In many countries, the exclusion of small producers from so‐called dynamic marketing channels (that is, remunerative ones) has become a concern. Based on data collected in Turkey in 2007 at the producer and the wholesale market levels, we show that intermediaries are important to understanding the impact of downstream restructuring (supermarkets) on upstream decisions (producers). Results show first that producers are not aware of the final buyer of their produce, because intermediaries hinder the visibility of the marketing channel, thereby restricting a producer's choice to that of the first intermediary. Econometric results show that producers who are indirectly linked to the supermarkets are more sensitive to their requirements in terms of quality and packaging than to the price premia compensating the effort made to meet standards. Therefore, the results lead us to question the role of the wholesale market agents who act as a buffer in the chain and protect small producers from negative shocks, but who stop positive shocks as well, and thereby reduce incentives.     

Pesticide use in Vietnamese vegetable production: a 10-year study

Vietnam has had varying success over the past decade with its pesticides policy. Some of the most toxic pesticides have been banned from the market. But while many countries have successfully decreased agricultural pesticide use per hectare, this has not (yet) happened in Vietnam. Due to insufficient pesticide management capacity of the Vietnamese government, pesticide types and quantities registered and distributed on the market have substantially increased in Vietnam over the last 10 years. A 10-year monitoring programme at farm level showed that pesticide use follows the increasing pesticide availability on the market, and many toxic and illegal pesticides are still being used. In an agricultural country dominated by millions of small-scale farmers and with limited state capacity for control at farm level, reduction of the use of the most toxic pesticides can best be achieved by more effective pesticide market control through stricter and more effective state regulations and implementation, aimed at eliminating illegal, low quality and counterfeit pesticides from the market. But even then, better state and private extension services, and greater state capacity for control and enforcement remain essential in enabling farmers to make better decisions about pesticide use.     

中国对英国蔬菜出口的实证分析

本文在简介英国农业发展和蔬菜供求特点的基础上,利用蔬菜进出口数量、金额、出口均价以及进口率等指标,分别从中国出口蔬菜和英国进口蔬菜的角度,对两国蔬菜贸易特征进行实证研究,据此提出中国深入开拓英国乃至欧盟蔬菜市场的主要建议蔬菜出口企业应注重提高产品质量;在出口市场定位上考虑发挥中国蔬菜的差异化竞争优势。同时,政府应为蔬菜出口企业提供相应的信息和政策支持等服务。     

国内外的蔬菜物流特点及其经验借鉴

有效推动我国蔬菜物流高速发展已成为当前亟待解决的重要问题,文章介绍了美、日、韩以及我国山东寿光等国内外蔬菜物流的特点,归纳出值得我国借鉴的六点经验。     

Healthy Profits: An Interdisciplinary Retail Framework that Increases the Sales of Healthy Foods

Disruptive layouts, smart carts, suggestive signage, GPS alerts, and touch-screen preordering all foreshadow an evolution in how healthy foods will be sold in grocery stores. Although seemingly unrelated, they will all influence sales by altering either how convenient, attractive, or normal (CAN) it is to purchase a healthy target food. A Retail Intervention Matrix shows how a retailer’s actions in these three areas can be redirected to target shoppers based on whether the shoppers are Health Vigilant, Health Predisposed, or Health Disinterested. For researchers, this review offers an organizing framework that integrates marketing, nutrition, psychology, public health, and behavioral economics to identify next generation research. For managers, this framework underscores how dozens of small, low cost, in-store changes are available to each that can surprisingly increase sales of entire categories of healthy food.     

The price stabilization effects of the EU entry price scheme for fruit and vegetables

The article assesses the stabilization effects of the EU import regime for fresh fruit and vegetables based on the entry price system (EPS). The analysis is carried out on the EU prices of tomatoes and lemons and those of imports from some of the main competing countries on the EU domestic markets: Morocco, Argentina, and Turkey. It is based on the estimation of a threshold vector autoregressive econometric model that is shown capable of taking the workings of the import regime into account. The model shows that prices behave differently when import prices are above/below the trigger entry price. This article allowed to highlight the cases for which the isolation effect of EPS seems reached and the resulting stabilization effects.     

Differences in Perceived Image of Fruit and Vegetables from a Specific Origin: The Moderating Role of Familiarity

Only a small number of works in the literature examines the role of familiarity in the perception of products from a specific origin, despite the importance of this variable in the formation of product image and its effects on consumer behavior. The current work aims to fill this gap in the literature by carrying out a cross-national analysis of consumers' image of fruit and vegetables that includes a defined origin. For this purpose, the authors examine the influence of product cues on the formation of a global image of the product, and considers the moderating role of familiarity in this relation. The results indicate that product familiarity has an effect on the relation between the product cues and the image perceived by the consumer, and that differences exist between the nationalities considered.