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Preface

According to the long-term plan accepted by the Editorial Board, in the middle of March 2010, we present to our readers the 23rd issue of Polish Journal of Commodity Science. As before, each article contains extensive summaries both in Polish and English. The summaries of all the papers are available at our webpage http://www.tpj.pr.radom.pl. The problems of production safety and protection of natural environment play an impor-tant role in activity of enterprises. In the current issue of our quarterly the set of 10 papers is opened by Bramorski article on new trends in agribusiness. Most attention was paid to agricul-tural wastes utilization and their use as energetic material. Author analyzes the application of anaerobic digesters in two American farms characterized by different livestock population. The possibilities of energy production in agriculture are the subject of the paper by Wybieralska and Wieczorek. Authors discuss modern tendencies in production of agricultural biogas. They treat the process as an important element of environmental quality control. Agri-cultural biogas is a valuable and still rarely used source of energy that may be utilized in many ways. The biogas gain over, its structure and applications were described. The environmental topic is continued in the next paper. At the present level of environ¬ment contamination with heavy metals, resulting in food contamination, the methods of the metals fixing and elimination become more and more important. In the consecutive paper Borycka presents the results of measurement of ability of cellulose obtained from aronia to fix heavy metals. Author concludes that the ability to adsorb metals (e.g. led and cadmium) de¬pends on the source and fraction content of the cellulose. The product marking is crucial information given by the manufacturer to the consumer. The proper marking of products is a subject of the paper by Gntarska et al. Authors assessed the correctness of marking of bottled water available at the local market. It was observed that improper names or trade marks, names of wells and sources used, as well as their localization and the information legibility were the most common faults. The acceptation of bitter taste by the alcoholic drink consumers are analyzed by Skolik and Kubiak. Authors present the results of sensory analysis of selected gins. Authors conclude that intense smell of the herbal additives and content of many flavors that effect the bitterness of the drinks tested make impossible the unambiguous determination of bitter taste intensity. The analysis of factors determining the quality of food product is a crucial problem facing commodity scientists. The consecutive paper by Skalecki et al. is devoted to the problem of quality of food products available at Polish market. Authors conducted detailed sensory and physical-chemical tests of hot-dog sausages in a net of shops in the city of Lublin. It was ob-served that the sausages manufactured by various producers revealed different content of wa¬ter and fat. It was also noticed that the prices of the sausages did not follow their quality. In the next paper Cais-Sokolińska presents the results of research on assessment of quality of fried cheese obtained by the traditional method using maturing curd, butter and skimmed cheese. The texture tests results and sensory characteristics of the cheese versus storage dura¬tion were presented. The sensory profile analysis revealed crucial differences among the cheese samples characterized by different fat content immediately after production process and during further storing. The raw material quality is an important factor determining the cosmetics quality. In the next paper Malinowska, Zieliński and Szymusiak present the research on phenol compounds content and antioxidant activity of a wide group of vegetable extracts that are used in cosmet¬ics. It was observed that the trade extracts were varied by the content of phenol compounds and antioxidant activity. Authors proved that the parameters evaluated in the work (FRAP and TEAC) were good determinants of quality of vegetable extracts used in cosmetic industry. It was concluded that these determinants were well correlated with the content of phenol com¬pounds contained in vegetable extracts. The market of surface cleansing agents is wide and diversified. In Poland, cleansing milks take the leading position among the household chemistry products cleaning hard surfaces. In the next paper Sułek, Klimaszewska and Rusek described the Polish market of cleansing milks. Authors stated that at present there was a wide selection of cleansing milks, varied by the functional properties, quality, producers and prices. The quality of footwear depends mostly on the materials used. The last paper in the current issue of the quarterly is a work by Aichowski and Golonka on the quality control of soft leather. Authors conclude that the quality and assortment of leathers depends mainly on the quality of the wet finish, so called retannage. The process also play a crucial role in control¬ling the mechanical and sensory indicators of leather. The 23rd issue of our quarterly is closed by the column "TPJ announcements". One can find there a note on doctoral and habilitation degrees that have been lastly awarded in com¬modity science.

 I wish you a nice reading

 prof, dr hab. inż. Ryszard Zieliński
 Editor of TPJ

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