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35 results on '"Cholewińska, Paulina"'

30. Application of the Electrical Impedance Analysis Method, Combined With Measurments Heat Resistence and Breaking Strength on The Comparison of Natural Wool Fibers of Selected Species of Animals with Polyacrylonitrile (PAN) Fiber.

Author

Cholewińska, Paulina, Wyrostek, Anna, Czyż, Katarzyna, Łuczycka, Deta, Konkol, Damian, and Korczyński, Mariusz

Subjects
*NATURAL fibers, *WOOL, *ELECTRIC impedance, *ANIMAL species, *BIODEGRADABLE materials, *FIBERS
Abstract

The production of clothing in recent years is mainly based on synthetic materials. Synthetics such as polyacrylonitrile fiber (PAN) significantly reduce the costs of clothing production. PAN fiber requires considerably more water than natural fibers in the treatment process, which has a negative impact on the environment. This is quite different in the case of natural fiber wool, which is a biodegradable material. Due to the high quality of its products, wool is also a material highly appreciated by the textile industry. Differences between the materials were determined by testing electrical properties (resistance and impedance), which may represent differences at the molecular level. As the use of the proposed method is at the preliminary stage, measurements of fiber diameter, heat resistance, and breaking stress were also performed to supplement the results. The electrical characteristic tests showed a higher resistance of wool compared to PAN fiber, which indicates that wool is a better dielectric than PAN fiber. The breaking stress tests showed that PAN fiber was the weakest of the assessed fibers. The measurements have also shown that the heat resistance of the samples of wool from alpaca were higher than those of PAN fiber. The wool samples from angora goats were characterized by the lowest heat resistance. [ABSTRACT FROM AUTHOR]

Published
2021
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31. Feed Additives Produced on the Basis of Organic Forms of Micronutrients as a Means of Biofortification of Food of Animal Origin

Author

Górniak, Wanda, Cholewińska, Paulina, and Konkol, Damian

Subjects
Article Subject
Abstract

In recent years, there has been a steadily growing demand for animal protein. Consumer awareness is also growing every year, which is why breeders are obliged to provide animals with the best possible environmental conditions that will determine the productivity of animals and the quality of raw materials obtained from them. Today's consumer is looking for not only the highest quality food but also the one that will characterize health-promoting properties. Therefore, food is sought, which will be characterized by a favorable profile of fatty acids and a high content of biologically active ingredients, such as vitamins or minerals. One of the most effective methods of enriching food with these ingredients is their supplementation in feed. However, it should be remembered that the form in which such a component will be delivered is very important. High hopes are associated with the possibility of using organic forms of macro- and micronutrients, which are sometimes better absorbed than inorganic salts. The aim of the work was to collect and systematize knowledge related to the possibility of enriching food of animal origin with micronutrients using additional feed containing these ingredients in organic form.

Published
2018
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35. Selected factors affecting the ruminant gastrointestinal microbiome and its basal composition

Author

Cholewińska P, Szeligowska N, Smoliński J, and Bawej M

Subjects
Animals, Archaea, Bacteria, Rumen, Ruminants, Gastrointestinal Microbiome
Abstract

The microbiome of the ruminant digestive system is one of the most complex examples of the interaction between microorganisms and the host. The microbiome of the digestive system of ruminants is necessary to obtain energy from plant food, which would not be possible without its participation. The microbiome of the digestive system consists of bacteria, archaea, protozoa and fungi. Bacteria are the most numerous group, with Firmicutes and Bacteroidetes being the main clusters. The composition of the microbiome, both quantitatively and qualitatively, depends on factors such as diet, age, health, and the environment. Additionally, it may be influenced by genetic or biological factors (e.g. gender). Microorganisms living in the digestive system of ruminants significantly affect their health or production indicators, which in turn is associated not only with the proper absorption of nutrients from food, but also with the function of the microbiome as a specific immune system.

Published
2021
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