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According to the long-term plan accepted by the Editorial Board, at the end of March 2012 we present to our readers the 30th – jubilee – issue of the Polish Journal of Commodity Science. According to the latest legal requirements we nominated subject editors and the statistical editor of the journal. Continuing efforts to widen the group of our readers we present some papers in English version. As before, regardless the language of the original publication, each paper contains a wide summary in both Polish and English. The summaries of all the works published one can find on our webpage In order to prevent ghostwriting and guest authorship the editorial board of the journal introduced proper procedures. That is why on our webpage one can find a new form for the authors, which contain the authors statement preventing ghostwriting and guest authorship. The series of 11 papers in the current, jubilee issue of the quatterly is opened by the work by Okońska and Foltynowicz on innovative applications of nanomaterials. The paper discusses the issues of innovative engineering solutions in the energy sector and involved in climate protection, which enagage nanomaterials and advanced technologies. The authors pay special attention to the new materials used in the construction of windmills, power transmission systems, membranes capturing carbon dioxide and hydrogen storages. Globalization forces continual improvement of management processes. The high quality of products, low production costs and high efficiency are prerequisities for achieving high market position. To achieve satisfactory results, companies are forced to continual development, and thus, to seek innovative solutions. A possible solution is the methodology of Lean Management, discussed in Maleszka and Linke work. This methodology focuses mainly on the elimination of these stages of process that do not generate added value for customers and, consequently, leads to a reduction of time and cost of the highest qualitz products. The authors conclude that Lean Management is implemented mostly by major manufacturing companies with foreign capital, mainly from the automotive industry. The article also presents the reasons for the implementation of Lean Management, the manner of implementation and expected benefits of implementation. The consecutive three papers relate to the factors influencing the quality of cosmetic products. In the first one, Zielinski discusses the latest numerical methodology that improves the design process of the cosmetic composition in the form of microemulsion. This paper summarizes the method of HLD, which is the latest achievement of several international research teams. The method is crucial for the control of cosmetics quality. HLD method uses the concept of a parameter deviation that characterizes the state of the planned microemulsion vs. optimal formulation, in which the system: surfactant - oil - water reveals the presence of three phases. Application of this method is illustrated by the numerical example: adjustment of components quantity in the microemulsion of W / O type. The paper also presents the features of the latest version of the program Optimal Surfactant HLD-NAC that performs calculations to facilitate the design of microemulsions. In the next paper Malinowska discusses the use of clays as natural ingredients of modern cosmetics. Clays are used as an important mineral components of cosmetics. Their use in cosmetic formulations allows skin cleansing, stimulates circulation and reduces inflammation. The paper presents the characteristics, chemical structure and applications of the most popular cosmetic clays. The issues related to the control of cosmetics quality are closed with the paper by Ogonowski and Kołkowska, in which the authors present the results of their research on the possible applications of plantain extracts in cosmetic products. The study involved a series of ointments containing these extracts. the stability of formulations obtained and the content of active substances were determined. The next work concerns the question of eco-labeling. Ucherek and Latocha analyze ecological information content of the products package present on the Polish market. It was found that the most common eco-labels placed on the packaging of both food and industrial products included packaging material identifying mark, a sign of adherence to the existing organizational system relating to packaging waste management and the mark pointing the proper handling of the packaging after use. The next six works relate to food quality. The first one is the work by Dzwola, which is the second part of the text discussing the harmful chemicals that are formed in foods. In the previous part the harmful effects on the human body of substances such as acrylamide, heterocyclic aromatic amines, benzene and polycyclic aromatic hydrocarbons were discussed. At present author presents health risks arising from the presence of ingredients such as acrolein, biogenic amines, N-nitrosamines, and chloropropanoles and 2-alkyl-cyclobuthanon. The author notes that these threats may be the result of thermolysis or radiolysis of some food ingredients or biochemical changes occurring in the unprocessed raw materials and heat treated raw materials. The subject of Jursza-Szymanska and Sobczynski paper are changes in beer flavor during storage. Applying the method of gas chromatography, the authors studied the changes in content of the main volatile components constituting the aroma of beer, such as alcohols and esters. Particularly noteworthy is the principal components method (PCA) application to clearly distinguish between fresh beers tested. This method also allowed for a clear distinction of samples of beer, depending on storage time. Cocoa powder is a valuable source of polyphenolic compounds with antioxidant properties. In another work Śmiechowska and Kłobukowski present results of their studies on the quality of cocoa powder. The authors determined the total content of polyphenols present in cocoa powders available on the Polish market. They found differences in the content of polyphenols and antioxidant activity of cocoa powders studied. In another work Zalewski and Piasek present results of their studies on the possible application of reflectance spectroscopy in the near infrared method to identify chocolate. A standard test procedure based on multivariate statistical methods, which allows quick analysis and distinction of the manufacturer of chocolate and determination of the content of cocoa mass in the trade products. Effect of some additives on the change of color and lycopene content in tomato paste is the subject of Przybylska and Felisiak paper. The effect of added salt, sugar and ascorbic acid on color and stability of lycopene in pasteurized and stored after pasteurization tomato paste was analyzed. It was found that addition of common salt is most effective in maintaining color stability and concentration of lycopene in tomato paste. Thirtieth issue of our quarterly is closed by the regular column „TPJ Announcements”. It contains the invitation to the Sixth Scientific Conference of the series „The role of commodity science in quality management in a knowledge-based economy”, which will be held on 12–14 September 2012 in Radom.

I wish you a nice reading
prof, dr hab. inz. Ryszard Zieliński

Editor of TPJ

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