Ulrich Hamm

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The phase shifting action of low temperature pulses of 6 degrees C and 2 h duration administered to the various phases of the Drosophila pseudoobscura circadian rhythm and the action of light pulses given 30 min after the beginning of these low temperature pulses have been investigated. The phase response curve obtained from experiments with light pulses(More)
Consumer interest in organic products is growing alongside a diversification of the supply. In order to serve consumers actual needs and wants regarding organic products, those involved in the market need to be informed about consumers' perception of organic products. Therefore, the state of research as regards consumers' perception of organic product(More)
Local production is becoming an increasingly important food attribute for consumers due to inter alia recent food scandals and the growing complexity of food production. Especially in the organic food market, local production is seen as an important additional value. Even though there is a high preference for local food, it is still unknown, what organic(More)
Ethical consumerism is a growing trend worldwide. Ethical consumers' expectations are increasing and neither the Fairtrade nor the organic farming concept covers all the ethical concerns of consumers. Against this background the aim of this research is to elicit consumers' preferences regarding organic food with additional ethical attributes and their(More)
  • Stephan Dabbert, Canan Abay, Samanta Rosi Bellière, Murat Boyaci, Antonio Compagnioni, Iris Förster +22 others
  • 2012
DISCLAIMER This publication was generated as part of the CERTCOST Project, agreement no. 207727 (http://www.certcost.org), with financial support from the European Community under the 7 th Framework Programme. The publication reflects the views of the author(s) and not those of the European Community, who is not to be held liable for any use that may be(More)
Members of the organic supply chain need high-quality data to make correct investment decisions, but data with sufficient depth and quality are not widely available in Europe. The quality of available data is a key concern for both data collectors and data users. The aim of this study is to identify whether the commonly used quality attributes (accuracy,(More)
The number of consumers following a vegan diet has notably increased in many industrialised countries and it is likely that their influence on the food sector will continue to grow. The aim of the present study was to identify different segments of consumers according to their motivation for following a vegan diet. Another objective was to analyse the(More)
There are many publications focusing on diverse aspects of marketing research for organic products. However, so far there have been very few attempts to provide an overall synthesis of current knowledge. The present study therefore gives an overview of marketing research for organic food consumption, enabling the identification of research strengths and(More)
This research investigates what information German Fairtrade coffee consumers search for during pre-purchase information seeking and to what extent information is retrieved. Furthermore, the sequence of the information search as well as the degree of cognitive involvement is highlighted. The role of labeling, the importance of additional ethical information(More)