Advantages and disadvantages of the use of irradiation for food preservation

Food irradiation is a physical method of processing food (e.g. freezing, canning). It has been thoroughly researched over the last four decades and is recognized as a safe and wholesome method. It has the potential both of disinfesting dried food to reduce storage losses and disinfesting fruits and vegetables to meet quarantine requirements for export trade. Low doses of irradiation inhibit spoilage losses due to sprouting of root and tuber crops. Food- borne diseases due to contamination by pathogenic microorganisms and parasites of meat, poultry, fish, fishery products and spices are on the increase. Irradiation of these solid foods can decontaminate them of pathogenic organisms and thus provide safe food to the consumer. Irradiation can successfully replace the fumigation treatment of cocoa beans and coffee beans and disinfest dried fish, dates, dried fruits, etc. One of the most important advantages of food irradiation processing is that it is a coldprocess which does not significantly alter physico-chemical characters of the treated product. It can be applied to food after its final packaging. Similar to other physical processes of food processing, (e.g. canning, freezing), irradiation is a capital intensive process. Thus, adequate product volume must be made available in order to maximize the use of the facility and minimize the unit cost of treatment. Lack of harmonization of regulations among the countries which have approved irradiated foods hampers the introduction of this technique for international trade. Action at the international level has to be taken in order to remedy this situation. One of the important limitations of food irradiation processing is its slow acceptance by consumers, due inter alia to a perceived association with radioactivity. The food industry tends to be reluctant to use the technology in view of uncertainties regarding consumer acceptance of treated foods. Several market testing and consumer acceptance studies have been carried out on food irradiation in recent years. These studies showed that, if the safety and the benefits of food irradiation were properly explained, the consumers were willing to accept irradiated foods. Considering its potential role in the reduction of post-harvest losses, providing safe supply of food and overcoming quarantine barriers, food irradiation has received wider government approvals during the last decade. There is also a trend towards increased commercialization of irradiated food. Currently, there are 47 irradiation facilities in some 23 countries being used for treating foods for commercial purposes.     

Factors affecting energy saving behaviour: a prospective research

The purpose of this study is to outline the theme of saving energy resources and its relationship with the preservation of the environment, as well as the importance of green marketing in achieving sustainability. The model of data collection was a survey conducted by self-administered questionnaire. After collection, the data were statistically analysed and interpreted. Most individuals claim to be concerned about environmental problems, with 68% of these belonging to the ‘Savers’ group. However, even though they may be concerned with environmental problems, the vast majority of individuals do not have any system of renewable energy in their homes, despite claiming that renewable energies are a viable option for protecting the environment. Women display behaviour that is more favourable to the saving of energy resources than do men. Educational levels are not significant for distinguishing the more pro-environmental individuals from the others.     

新形势下环境监测科技发展现状与展望

结合国家生态环境监测网络建设方案和环境监测管理方式的变化,依据"十三五"期间环境保护重点工作和国家科技体制改革方向,对环境监测科研现状进行了分析。从环境监测技术体系建设、国家重点研发计划、国家科技重大专项等方面综合考虑,分析了水、气、土等方面的科研工作现状和问题,总结了"十三五"期间环境监测技术体系建设需求和进度安排,归纳了国家层面环境监测科技发展需求,提出了"十三五"环境监测科技发展的展望与思路。     

Is local produce more expensive? Challenging perceptions of price in local food systems

This research examines price in local food systems to identify whether the perception that local is more expensive is justified. This study seeks to contribute to the field by addressing the dearth of quantitative price and availability research and building upon existing empirical research by considering a broader range of distribution channels and organic produce. Without a stronger understanding of pricing structures and distribution models, local food initiatives are based on assumptions rather than evidence. Using a case-study approach of the Region of Waterloo (Ontario, Canada), price and product data were collected at 11 outlets over a 6-month period. The study involved regression analysis of six locally produced fruits and vegetables based on local, Ontario, and organic attributes associated with the products and comparison with consumer willingness-to-pay research. Results show that local produce in the case study is not consistently more expensive than the non-local option. Both price discounts and premiums are found, depending on the product. These findings challenge the “local is more expensive” assumption and support suggestions that local food systems can be spaces for social inclusion. The organic attribute is associated with a price premium in all cases and may create confusion among consumers given frequent overlap between the local and organic attributes. Proponents of local food can use the results of this study to inform programme and policy development. Most notably, the study suggests that education around the distinction between local and organic as well as challenges to the price perception could be of benefit.     

生活生产类产品VOCs含量限值法规与标准研究

本文对国内生活生产类产品VOCs含量限值的国家标准、地方标准、行业标准以及中国香港、欧美等发达地区精细化的生活生产类产品VOCs含量限值法规和标准做了比较全面的综述,并从产品限值种类以及限值要求两个方面进行了对比研究和分析,提出了我国生产生活类产品VOCs 含量限值法规标准制定建议。笔者认为,应借鉴发达国家成功的生活生产类产品VOCs含量限值法规及标准制定经验,从做好标准和产品技术要求衔接、建立区域协同制定标准模式、结合经济因素或环境空气质量,分步推进相关标准制定和发布等方面入手,建立符合实际国情的产品种类较为全面、标准要求较高的生产生活类产品VOCs含量限值法规与标准体系,尤其是生活消费品方面,减少直接与人体接触的生活消费品VOCs排放。     

The Role of Organizational Perception,Perceived Consumer Effectiveness and Self-efficacy in Recycling Advocacy Advertising Effectiveness

Previous academic research into how consumers evaluate advocacy advertising identified many possible paths involving potentially reflexive effects on how people perceive an advocacy advertising sponsor, the advocated issue and themselves. This paper has examined one possible scenario within this complicated phenomenon: that of advertising advocating a specific environmental consumer action, recycling. In the specific context of this study, structural equation modelling demonstrated clear causal relationships among consumer perceptions of the recycling advertisements’ sponsoring organization, consumer self-efficacy and perceived consumer effectiveness of complying with the advocated issue (recycling behaviour). These factors were shown to impact specific advocacy advertising goals (termed message effectiveness in this study) such as behavioural intention toward the advocated recycling issue and perceived changes in how consumers evaluate the sponsoring organization.     

Evaluating Consumer Understanding of the Swedish Meat Guide—A Multi-layered Environmental Information Tool Communicating Trade-offs When Choosing Food

To facilitate the choice of more sustainable animal-based products in the diet, a Swedish meat guide providing complex, multi-layered environmental information to non-experts has been developed. This study evaluated reception of this guide by consumers. In five focus groups, participants (“interested consumers”) carried out a joint environmental and animal welfare ranking assignment to test understanding and use of the guide. The type and detail of indicators (e.g. carbon footprint) in the meat guide suited the audience. The guide stimulated discussion on ethical issues and quality aspects of meat, revealed perceived obstacles to reducing meat consumption and provided an understanding that any food product chosen comes with trade-offs.     

Responding to crises and disasters: the role of risk attitudes and risk perceptions

Discussions are taking place both in the United States and in Europe about how governments should respond to both disasters and crises, and how citizens' non-desirable behaviour might be managed with respect to such disasters. Here we examine the role that risk attitudes and risk perceptions play in decision making behaviour of individuals in times of crises and disasters and how knowledge about individual behaviour and its drivers may be helpful when developing policy. The proposed framework complements the existing literature, thereby further enriching the knowledge of crises and disaster management.     

ASsessment Of Alcohol Ethoxylate Surfactants And Fatty Alcohols Mixtures In River Sediments And Prospective Risk Assessment

A feasible and relatively readily available analytical method was adapted for the assessment of alcohol ethoxylates (AE) and fatty alcohols (FA) in sediments. This study illustrates the simultaneous measurement of 38 of 114 possible alcohol ethoxylate ethoxymers (AE) and fatty alcohols (FA) found in commercially important AE products. We predicted toxicity for all identified fractions, as well as the total mixture toxicity, relative to three exposure scenarios via sewage treatment plants (STP) for these widely used chemicals in consumer products and hence generate a preliminary environmental risk screening for AE and FA in sediments. The method is based on derivatization of solvent or solid-phase extracts with 2-fluoro-N-methylpyridinium p-toluenesulfonate (Pyr+). The derivatized extracts were analyzed with liquid chromatography/mass spectrometry (LC/MS) operating in the positive ion electrospray mode. The extraction efficiency of AE and FA in three different sediments of varying composition was evaluated with spike-recovery studies, ranging from 64% to 80%. The detection limits for individual ethoxymers typically ranged from 1 to 5ngg⁻¹on a dry weight basis. The mean limit of detection (LOD) was 6ngg⁻¹and the median LOD was 3ngg⁻¹. AE and FA in sediments were found to be stable for two weeks if preserved with 3% (v/v) formalin and stored at 4–6^∘C. Based on equilibrium partitioning, background concentrations of AE and FA were predicted to be below concentrations known to elicit chronically toxic effects. Total worst case mixture toxicities for all AE ethoxymers combined with FA were predicted to result in a risk quotient less than 0.6. Activated sludge treatment (STP) significantly reduced the release of total AE and FA by four-fold, suggesting that the total mixture risk quotient would be < 0.15 for sediment dependent organisms.     

Taking Consumers Seriously: Two Concepts of Consumer Sovereignty

Governments, producers, and international free tradeorganizations like the World Trade Organization (WTO) areincreasingly confronted with consumers who not only buy (or don'tbuy) goods, but also demand that those goods are producedconforming to certain ethical (often diverse) standards. Not onlysafety and health belong to these ethical ideals, but animalwelfare, environmental concerns, labor circumstances, and fairtrade. However, this phantom haunts the dusty world of social andpolitical philosophy as well. The new concept ``consumersovereignty' bypasses the conceptual dichotomy of consumer andcitizen.According to the narrow liberal response to this newconstellation, with respect to food one should conceptualizeconsumer sovereignty as the right of the individual consumer toget information on food products and to make his or her ownchoice on the market of food products. In this conception, thereis a very strong emphasis on rules and principles with respect tothe autonomy of individuals.I argue that these narrow liberal concepts are not sufficient forappropriate public policy-making in democratic societies, andthat they only enable us to identify problems; they do not helpnon-experts (and experts, if it comes to that, as well) inweighing the different ethical claims. Besides, not onlyprinciples play a role in the outcome, but all kinds of ideals aswell, like roles, values, and norms. My principal argument isthat analysis or justification of norms or principles is notsufficient to get a synthesis or construction of ethicalsolutions: we need some value orientation to guide us inbalancing the different ethical claims by solving an ethicalproblem. Moreover, this balancing is something that requiressocial space and social time, i.e., public debates. With theconcept of public debates a whole new dimension enters ethicalanalysis, because the attention of ethicists shifts toformulating criteria of successful and rational public debates.However, in the broad liberal view these concepts aresupplemented with values, preferences, practices of care, andinvolvement. I argue firstly for a broadened perspective on foodas an integral part of life styles and not only as something thatpresents risks. That is the reason that food gets such intensiveattention from the public, which is summarized in the concept ofconsumer concerns. Secondly, I defend the argument that not only(rational) public debates, but intensive commitments of bothproducers and consumers in every link of the chain in so calledcare practices or consumer councils can enhance confidence in thefood production system and the way we extract our daily intakefrom nature.