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According to the long-term plan accepted by the Editorial Board, in the first days of April
2019 we present to our readers the 59th issue of the Polish Journal of Commodity Science.
Continuing the efforts to widen the group of our readers all the papers are published in
English. We would like to remind that now, only papers written in English are accepted by the
editors. As before, each paper contains a wide summary in Polish and English. The summaries
in both language versions of all the works published one can find on our web page Moreover, at the web page an open-access to all the
papers published up to 2017 is offered.
In mid-March 2019, a group of Polish commodities experts was abandoned by Professor
Zofia Cichoń – a well-deserved researcher at the Faculty of Commodity Science and Product
Management at the University of Economics in Krakow. The current issue of our journal
opens with a reminiscence on the figure of Professor.
A series o f 1 2 a rticles i n t he c urrent i ssue o f o ur j ournal i s opened by the work by
Żuchowski and Łagowski on sustainable development. The authors presented voluntary and
obligatory legal regulations in this area. The provisions of ISO 9004: 2018 regarding the
implementation of sustainable development goals are introduced. The authors also discussed
the potential of integration of these aspects, which are of particular importance for its
development in a coherent system of implementing the principles of sustainable development.
In the next paper, Śniegocka-Dworak and Wilczyńska present the results of surveys
concerning consumers' opinions regarding the quality of traditional and regional food. The
purpose of the work was to define the attributes of the quality of regional food and the
understanding of this concept by consumers. The authors analyzed the motives of purchasing
traditional and regional food by consumers based on the results of surveys carried out in the
Pomeranian Voivodeship. It was found that the interest in regional food was growing and
consumers often consciously purchased good quality food directly from producers.
One of the main public health problems in both Poland and the world is obesity. In order to
solve this problem, various methods of assessing the satiety level are proposed in the
literature. In the consecutive text Skotnicka presents the results of her research aiming at
determining a satiety level after consumption of selected legume seeds by young women.
Based on the tests conducted, it was found that the satiating potential of the tested legumes
depended mainly on the chemical composition and rheological properties of the product. The
author suggests that the felt satiety was associated mainly with the volume of legume grains,
water and fiber content.
In the next paper Kowalska et al. present the possibilities of using enzymes in improving
the quality of food products. The use of enzymes in the production of food manufactured by
the meat, fruit and vegetable, fermentation, brewing, dairy and other food industries is
A quality determinant of food products, especially those obtained on the basis of cereals,
is the content of dietary fiber. The content of dietary fiber in bran from various cereals and the
assessment of its antioxidant properties are the subject of research by Kiewlicz. In the work,
the author presents the results of her research on fiber from wheat, spelled, flatulence, oat, rye
and buckwheat brans. It was shown that among the bran types tested the highest content of
dietary fiber was found in wheat bran. On the basis of the tests, it was also found that rye bran
was characterized by the highest antiradical activity among the bran types tested. The subject of the research presented in the next article is the analysis of the content of
phenolic compounds in chocolates. Dankowska and Kossowska present the results of their
research on the characteristics of 33 chocolates present on the market, both brand and ownbrand
products. It was found that the main source of antioxidants in the tested chocolates was
the cocoa mass. It was shown that the content of phenolic compounds in total in own-brand
chocolates was comparable (in some cases is even higher) to their content in brand chocolates.
The problem of waste management consisting of electrical and electronic equipment
wastes is the subject of the Cieszyńska paper. This type of waste contains significant amounts
of precious metals. The work discusses the possibilities available in the world literature for the
use of these electrowaste as a valuable source of many precious metals. The author presents
current trends in technologies for recovery of precious metals from electrowaste by means of
In the consecutive paper Małysa et al. discuss economic and tribological aspects of
application of native oils obtained from waste seeds of berry plants. The results of the research
on the possibility of using these wastes as alternative bases of lubricants are presented. On the
basis of tribological tests it was found that in tests under constant load proposed vegetable
bases erer characterized by better abilities to reduce motion resistance and wear as compared
to paraffin oil bases. It was also found that the most favorable anti-seizure activity was
exhibited by blackcurrant oil.
Possibilities of using elastomer nanocomposites are the subject of research carried out by
Przybyłek. The author presents the market of rubber products and the role of nanofillers in
improving the quality of elastomer products. The structure of aluminosilicate nanofillers used
in the processing of elastomers is discussed. The work also presents the influence of
nanocomposites on the properties of elastomers.
The issue of the safety of using shower gels for children is the subject of research
presented by Klimaszewska, Ogorzałek and Zaporowska. Based on their research, the authors
propose to improve the safety of using baby shower gels through the appication of protein
hydrolyzates in these compositions. The studies carried out show that the presence of bovine
albumin hydrolyzate in the formulations causes a significant decrease in the irritant potential
of the composition as compared to the reference preparation without the hydrolysates. There
was also an increase in skin hydration and a decrease in transpidermal water loss after using
gels containing hydrolysates of various proteins.
The subject of the next work is the oxidative and physicochemical stability of washing
oils. Malinowska presents the results of her own research on oxidative and rheological
changes of cleaning oils in several storage tests at 5, 25 and 40°C. It was found that storage
conditions affect the color of cleaning oils at 25°C and 40° C. The appearance of a darker
color of washing oils was observed in samples containing Tocomix L50-IP and BHT.
Simultaneously, no significant changes in the density of washing oils during storage were
observed. It was found that Tocomix L50-IP can be used at the concentrations recommended
by their manufacturers as a natural antioxidant instead of synthetic BHT.
The methods for assessing the quality of loose cosmetic products are the subject of the last
paper. Zięba, Ocieczek and Czerwonka present the results of their research on the stability
assessment of two types of commercial powder shampoos. The authors perforemd tests on
changes in the activity and water content in the examined shampoos under the influence of
external environment conditions. There were significant differences in the granulometric
composition of selected dry shampoos. On the basis of thermogravimetric measurements, the
thermal stability of the dry shampoo tested was determined. The applicability of the analytical
methods used to assess the quality of dry shampoos has been experimentally demonstrated.The 59th issue of our quarterly is closed by the “PJCS Announcements” column. It contains
information about scholars working in the field of commodity science, who obtained their
habilitation degrees in 2018.

I wish you a nice reading

PJCS Editor
Prof. dr hab. inż. Ryszard Zieliński




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