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Preface

In accordance with a long-term publishing strategy approved by the Editorial Board at the end of May 2005, we are publishing the third issue of the "Polish Journal of Commodity Science" ąuarterly (Towaroznawcze Problemy Jakości). This edition deals mainly with issues linking commodity science with creation and protection of environment ąuality. We are continuously trying to increase the number of our authors as well as readers and that is why this issue contains several articles in English. Like in the previous issue, each article is accompanied by extensive abstracts both in Polish and English. These abstracts are also available on our magazine's website— www.tpj.pr.radom.pl. The series of eleven articles published in this issue of the ąuarterly starts with P. Szewczyk's publication in which the author defines the term 'industrial ecology' and determines its links with commodity science. The problems of interpretation in the environmen-tal life cycle assessment are the subject of the article by A. Lewandowska. In the author's opi-nion the interpretation of the results is a crucial but still underestimated element in the product life cycle analysis. A paper by Z. Foltynowicz presents some current issues concerning product ecolabelling and integrated product policy.

Ecolabelling of packaged products is also the subject of the paper by M. Lisinska-Kusnierz and M. Ucherek. In their article the authors present the results of a survey on ecological aware-ness of economics students in Southern Poland and students of several economics colleges in EU countries. A very thorough study by M. Stryjakowska-Sekulska and others deals with very inte-resting results of experimental research concerning atmospheric air ąuality in terms of determination of its microbiological purity both inside and outside the buildings of Poznań University of Economics. It is obvious that people's health and physical and mental state are negatively affec-ted by the presence of extremely allergenic species of microorganisms, isolated by the authors. The paper by Smiechowska, in which the author sets out the application possibilities of common spices and herbs as bioindicators in environment pollution assessment, seems to be essential for practical purposes. The next article presents new opportunities for expanding the rangę of classi-cal measurement methods by applying concentrated environmental samples with the use of a suspended cationic surfactant - naphthalene. In this paper A. Kryjom and R. Zielinski propose to apply this type of condensation systems for quantitative determination of Iow concentration of phosphates in surface waters. The analysis of waters polluted by surfactants is discussed in the article by K. Wybieralska. The author reviews the literaturę dealing with membranę ion-selective electrodes and presents the possibilities of practical application of the group of membranę elec-trodes sensitive to some selected cationic surfactants.

Practical environment-friendly activities usually result from a change in previously applied technologies. One example of such activities is electrostatic powder painting. In his paper A. Gajewski writes about ecological and economic aspects of the application of this techniąue.

The major objective of each enterprise in food industry is to guarantee food safety. Determination to guarantee complete safety of industrial and food products which are put on the market is fundamental in functioning of the European markets. The subject of product safety is continu-ed in the paper by Z. Krejpcio and others, where it is discussed with reference to the products designed for infants and children. The results of ąuality research on powdered milk with ricegroats and powdered milk with rice groats and fruit show that the concentration levels of heavy metals are within the acceptable standards. In the final article of this edition of our magazine A. Giczewska and others present the results of the survey concerning consumers' taste preferences for yoghurts and they assess a sensory ąuality of these products.

The third issue of our ąuarterly closes with a regular column 'TPJ Information'. In this section, a report from the conference 'The Wielkopolska Quality from the European Perspective' deserves special attention. The conference was organisedby Wielkopolski Institute of Quality in Poznań and Commodity Science Committee - Quality Institute of the Polish Academy of Sciences - Poznań Branch. The reader can also find here the invitations to the VI Symposium 'Quarter-nary Ammonium Salts and their Application in Economy' and to the VIII International Commodity Science Conference 'Current Trends in Commodity Science'.

I hope you will find this magazine very interesting.

TPJ Deputy Editor-in-Chief Prof. dr hab. inż. Ryszard Zieliński

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