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Wyświetlanie 1-5 z 5
Tytuł:
The production efficiency and specific energy consumption during processing of corn extrudates with fresh vegetables addition
Wydajność procesu i jednostkowe zapotrzebowanie energii mechanicznej podczas wytwarzania ekstrudatów kukurydzianych z dodatkiem świeżych warzyw
Autorzy:
Lisiecka, Katarzyna
Wójtowicz, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/93979.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Inżynierii Rolniczej
Tematy:
corn
extrusion-cooking
vegetable
efficiency
SME
kukurydza
ekstruzja
warzywa
wydajność
Opis:
The aim of the work was to determine the influence of screw speed and variable amounts of fresh vegetable additives on selected aspects of extrusion-cooking of corn-vegetable blends. Corn grit as a basic component was supplemented with a fresh pulp of beetroot, carrot, leek and onion in amounts of 2.5-10% in the recipe. The extrusion-cooking was carried out using a single-screw extruder in the temperature range 120-145°C and extrudates were formed into directly expanded snacks. Two indicators were measured: the production efficiency (Q) and the specific mechanical energy (SME) consumption. As a result of the findings it was noted that the rotational speed of the extruder’s screw showed a greater impact on both production efficiency and SME as compared to the variable amounts of applied additives. A tendency to increased efficiency and specific mechanical energy consumption was observed along with the increase of screw speed during processing. The highest production efficiency was observed if fresh leek and onion were used as additives and the highest extrusion speed screw was applied. The largest specific energy consumption was noted during the extrusioncooking of blends containing fresh carrot and onion addition at high screw speed.
Celem pracy było określenie wpływu prędkości ślimaka i zmiennych ilości świeżych dodatków warzywnych na wybrane aspekty ekstruzji mieszanek kukurydziano-warzywnych. Grys kukurydziany jako podstawowy składnik uzupełniono dodatkiem pulpy ze świeżych buraków, marchwi, pora i cebuli w ilości 2,5-10,0% receptury. Ekstruzję prowadzono z zastosowaniem jednoślimakowego ekstrudera w zakresie temperatury 120-145°C, zaś ekstrudaty formowano do postaci bezpośrednio ekspandowanych przekąsek. Badano dwa wskaźniki: wydajność produkcji (Q) i specyficzne zapotrzebowanie energii mechanicznej (SME). W wyniku przeprowadzonych badań zauważono, że prędkość obrotowa ślimaka ekstrudera wykazała większy wpływ zarówno na wydajność procesu, jak i na SME w porównaniu ze zmienną ilością zastosowanych dodatków. Zaobserwowano tendencję do zwiększonej wydajności i zapotrzebowania energii mechanicznej wraz ze wzrostem prędkości obrotowej ślimaka podczas ekstruzji. Najwyższą wydajność procesu zaobserwowano, gdy jako dodatki zastosowano świeży por i cebulę, zaś ekstruzję prowadzono przy zastosowaniu najwyższej prędkości ślimaka. Największe jednostkowe zapotrzebowanie energii odnotowano podczas ekstruzji mieszanek zawierających dodatek świeżej marchwi i cebuli przy wysokich obrotach ślimaka ekstrudera.
Źródło:
Agricultural Engineering; 2019, 23, 2; 15-23
2083-1587
Pojawia się w:
Agricultural Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Composition and Processing Conditions on Selected Properties of Potato-Based Pellets and Microwave-Expanded Snacks Supplemented with Fresh Beetroot Pulp
Autorzy:
Lisiecka, Katarzyna
Wójtowicz, Agnieszka
Sujak, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/1363266.pdf
Data publikacji:
2021-06-11
Wydawca:
Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
Tematy:
extrusion-cooking
snack pellets
beetroot
microwave expansion
chemical composition
molecular structure
Opis:
The aim of this study was to evaluate the influence of the addition of fresh beetroot pulp in amounts from 2.5 to 30.0 g/100 g, as well as variable screw speeds (60, 80, 100 rpm) on the chemical composition, water absorption, water solubility index, density, expansion rate, and texture of potato-based pellets and expanded snacks. Their protein and starch structure was analyzed using the Fourier-transformed infrared (FTIR) spectroscopy. The snack pellets were made at a moisture content of 33 g/100 g of blends using a single-screw extruder equipped with a plasticizing unit having a length-to-diameter ratio (L/D) of 18. Processing temperature ranged from 65 to 105°C. The ready-to-eat snacks were expanded using microwave treatment (750 W, 40 s). Fresh vegetable pulp addition raised the protein content. The extrusion-cooking caused an increase in the content of insoluble dietary fiber and water absorption index of the pellets. In contrast, the microwave treatment reduced values of these parameters in expanded products and decreased the insoluble dietary fiber content of the expanded snacks. The addition of fresh beetroot pulp diminished the expansion ability and increased the content of β-sheet proteins. Additionally, an increase in the content of β-turn and β-sheet protein fractions was observed at the expense of random coil structure. This indicates that the protein structure underwent some form of ordering as the molecular interactions of the proteins intensified. The highest fraction of β-structures and the smallest content of random coil were observed when 80 rpm was applied during processing. It seems to be the most efficient screw speed in processing fresh beetroot pulp-supplemented snack pellets. Application of a fresh beetroot pulp as an additive in microwave expanded snacks made it possible to obtain products with an increased amount of fiber and a reduced fat content as an attractive and healthy alternative to deep-fried snacks.
Źródło:
Polish Journal of Food and Nutrition Sciences; 2021, 71, 2; 211-236
1230-0322
2083-6007
Pojawia się w:
Polish Journal of Food and Nutrition Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Constructive and destructive methods of copying with anger at students - measurement trial in an international perspective
Autorzy:
Lisiecka, Katarzyna
Cieślik, Marta
Kolisetska, Anastasiia
Wyszomierska, Jowita Karina
Stachowicz, Magdalena
Ortenburger, Dorota
Bakota, Daniel
Wąsik, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/772767.pdf
Data publikacji:
2016
Wydawca:
PPHU Projack Jacek Wąsik
Tematy:
anger turned inward
anger turned outward
copying with anger
international perspective
students
Opis:
The objective of the presented paper was to compare the selected variables of ways to deal with anger students at two countries (Poland and Sweden). Throughout history, traditionally psychotherapists have conceptualized two primary ways to deal with anger - anger turned inward or anger turned outward. Anger can be the most difficult emotion and reaction to modify. The focus of the deliberations has been the area of selected constructive and destructive methods of copying with anger at students. The presen ted research was aiming at finding an answer to the question: how students in Poland and students in Sweden deal with anger? The research sample group consisted of the students in Poland (n=37) and students in Sweden (n=30). Questionnaires of an accepted psychometric value were applied in the research (Anger Scale, Emotional Control Scale ). Data concerning expression of experienced anger were obtained. The information refers to general situations and reactions that are usually revealed, typical for a par ticular student. T he obtained data are of a self - descriptive character. The current study present that there are no significant differences between anger turned inward (p=0. 293). In the light of the obtained data, the factor referred to as anger turned in ward not differentiates the examined groups. The findings showing the higher level of anger turned outward at the students in Poland, but its not enough data to draw conclusions.
Źródło:
Physical Activity Review; 2016, 4; 200-203
2300-5076
Pojawia się w:
Physical Activity Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Radon intercomparison tests : Katowice, 2016
Autorzy:
Chałupnik, Stanisław
Skubacz, Krystian
Wysocka, Małgorzata
Mazur, Jadwiga
Bonczyk, Michał
Kozak, Krzysztof
Grządziel, Dominika
Urban, Paweł
Tchorz-Trzeciakiewicz, D.
Kozłowska, Beata
Walencik-Łata, Agata
Podstawczyńska, Agnieszka
Olszewski, Jerzy
Bartak, Jakub
Karpińska, Maria
Wołoszczuk, Katarzyna
Dohojda, Marek
Nowak, Jakub
Długosz-Lisiecka, Magdalena
Foerster, Elisabeth
Przylibski, Tadeusz A.
Powiązania:
https://bibliotekanauki.pl/articles/146183.pdf
Data publikacji:
2020
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
active monitors
passive monitors
Polish Radon Centre
proficiency test
radon
Opis:
At the beginning of the year 2016, the representatives of the Polish Radon Centre decided to organize proficiency tests (PTs) for measurements of radon gas and radon decay products in the air, involving radon monitors and laboratory passive techniques. The Silesian Centre for Environmental Radioactivity of the Central Mining Institute (GIG), Katowice, became responsible for the organization of the PT exercises. The main reason to choose that location was the radon chamber in GIG with a volume of 17 m3 , the biggest one in Poland. Accordingly, 13 participants from Poland plus one participant from Germany expressed their interest. The participants were invited to inform the organizers about what types of monitors and methods they would like to check during the tests. On this basis, the GIG team prepared the proposal for the schedule of exercises, such as the required level(s) of radon concentrations, the number and periods of tests, proposed potential alpha energy concentration (PAEC) levels and also the overall period of PT. The PT activity was performed between 6th and 17th June 2016. After assessment of the results, the agreement between radon monitors and other measurement methods was confirmed. In the case of PAEC monitors and methods of measurements, the results of PT exercises were consistent and confirmed the accuracy of the calibration procedures used by the participants. The results of the PAEC PTs will be published elsewhere; in this paper, only the results of radon intercomparison are described.
Źródło:
Nukleonika; 2020, 65, 2; 127-132
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
National comparison of methods for determination of radon in water
Autorzy:
Mazur, Jadwiga
Kozak, Krzysztof
Grządziel, Dominik
Guguła, Szymon
Mroczek, Mariusz
Kozłowska, Beata
Walencik-Łata, Agata
Podgórska, Zuzanna
Wołoszczuk, Katarzyna
Przylibski, Tadeusz A.
Kowalska, Agata
Domin, Elżbieta
Wysocka, Małgorzata
Chałupnik, Stanisław
Chmielewska, Izabela
Długosz-Lisiecka, Magdalena
Szajerski, Piotr
Chau, Nguyen Dinh
Krakowska, Paulina
Pliszczyński, Tomasz
Ośko, Jakub
Dymecka, Małgorzata
Mazurek, Daria
Powiązania:
https://bibliotekanauki.pl/articles/148272.pdf
Data publikacji:
2020
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
AlphaGUARD monitor
interlaboratory comparison
LSC method
radon in water
Z-score value
Opis:
The article describes three interlaboratory experiments concerning 222Rn determination in water samples. The first two experiments were carried out with the use of artificial radon waters prepared by the Laboratory of Radiometric Expertise (LER), Institute of Nuclear Physics, Polish Academy of Sciences in Kraków in 2014 and 2018. The third experiment was performed using natural environment waters collected in the vicinity of the former uranium mine in Kowary in 2016. Most of the institutions performing radon in water measurements in Poland were gathered in the Polish Radon Centre Network, and they participated in the experiments. The goal of these exercises was to evaluate different measurement techniques used routinely in Polish laboratories and the laboratories’ proficiency of radon in water measurements. In the experiment performed in 2018, the reference values of 222Rn concentration in water were calculated based on the method developed at LER. The participants’ results appeared to be worse for low radon concentration than for high radon concentrations. The conclusions drawn on that base indicated the weaknesses of the used methods and probably the sampling. The interlaboratory experiments, in term, can help to improve the participants’ skills and reliability of their results.
Źródło:
Nukleonika; 2020, 65, 2; 77-81
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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