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Wyświetlanie 1-10 z 263
Tytuł:
On finite functions with non-trivial arity gap
Autorzy:
Shtrakov, Slavcho
Koppitz, Jörg
Powiązania:
https://bibliotekanauki.pl/articles/729003.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
essential variable
identification minor
essential arity gap
Opis:
Given an n-ary k-valued function f, gap(f) denotes the minimal number of essential variables in f which become fictive when identifying any two distinct essential variables in f.
We particularly solve a problem concerning the explicit determination of n-ary k-valued functions f with 2 ≤ gap(f) ≤ n ≤ k. Our methods yield new combinatorial results about the number of such functions.
Źródło:
Discussiones Mathematicae - General Algebra and Applications; 2010, 30, 2; 217-245
1509-9415
Pojawia się w:
Discussiones Mathematicae - General Algebra and Applications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hildebrandts theorem for the essential spectrum
Autorzy:
Bracic, J.
Diogo, C.
Powiązania:
https://bibliotekanauki.pl/articles/255837.pdf
Data publikacji:
2015
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
essential spectrum
Hildebrandt's theorem
essential numerical range
Opis:
We prove a variant of Hildebrandt's theorem which asserts that the convex hull of the essential spectrum of an operator A on a complex Hilbert space is equal to the intersection of the essential numerical ranges of operators which are similar to A. As a consequence, it is given a necessary and sufficient condition for zero not being in the convex hull of the essential spectrum of A.
Źródło:
Opuscula Mathematica; 2015, 35, 3; 279-285
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of chromium on ruminant health
Autorzy:
Zarczynska, K.
Krzebietke, S.
Powiązania:
https://bibliotekanauki.pl/articles/1192470.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:
chromium
ruminants
essential nutrient
toxicity
Opis:
Chromium (Cr) is a micronutrient that occurs in the natural environment in different oxidation states. Natural compounds contain chromium in the +3 oxidation state, whereas chromic(VI) acid derivatives are industrial products with strong toxicity. Hexavalent chromium compounds can adversely affect the respiratory system and the gastrointestinal tract, cause skin changes, and exert carcinogenic, mutagenic, embryotoxic as well as teratogenic effects. Research indicates that both organic and inorganic trivalent chromium compounds improve carbohydrate, lipid, and protein metabolism. These compounds are found in many enzymes, and they influence antioxidant processes, regulation of immune responses, and the secretion of hormones and selected vitamins in the body. In animals, Cr has been found to increase fat-free body mass, improve reproductive parameters, enhance growth, increase feed conversion efficiency, boost immunity, and decrease mortality. It has been suggested that Cr supplements can intensify the effects of insulin, decrease the plasma levels of non-esterified fatty acids (NEFAs), decrease triglyceride concentrations in the liver, and improve glucose tolerance, thus improving the performance and productivity of cattle in the perinatal period. Symptoms of chromium deficiency, including decreased feed intake, lower weight gains, reproductive disorders, and higher lipid levels, are observed in cattle fed diets that are low in this nutrient, and in animals that are exposed to considerable and prolonged stress. In ruminants, chromium supplementation is recommended during thermal stress, in the perinatal period, and during infections.
Źródło:
Journal of Elementology; 2020, 25, 3; 893-903
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Antifungal activity of PLA foils covered with ethylocelulose containing essential oils
Autorzy:
Łopusiewicz, Łukasz
Mizielińska, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/1113918.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
active coatings
antifungal properties
essential oils
Opis:
The purpose of the research work was to examine the antifungal properties of cumin, rosemary and fennel essential oils. The goal of the study was also to determine antifungal activity of coatings containing the essential oils. The results of the study demonstrated that cumin, rosemary and fennel essential oils exhibited antifungal properties. The most sensitive strains were Botrytis cinerea and Mucor circinelloides. The cumin oil was found to be the most active. The growth of Botrytis cinerea and Mucor circinelloides was not observed even on medium containing 0.1% of cumin oil. The growth of Aspergillus niger, Aspergillus clavatus and Rhizopus oryzae was not noticed on mediums containig 0.5% of the oil. The similar results were obtained for fennel essential oil. 0.5% concentration of the oil in medium inhibited the growth of Botrytis cinerea, Mucor circinelloides, Aspergillus clavatus, Rhizopus oryzae. The rosemary oil did not inhibited the growth of fungi strains in concentration of 0,1%.
Źródło:
World News of Natural Sciences; 2017, 12; 27-32
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Anti-babesial potential and chemical composition of essential oil from yarrow Achillea millefolium
Autorzy:
Guz, L.
Wawrzykowski, J.
Adaszek, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/2087200.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Achillea millefolium
anitbabesial activity
essential oil
Źródło:
Polish Journal of Veterinary Sciences; 2021, 24, 1; 79-84
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Inhibitory activities of essential oils against Babesia canis
Autorzy:
Guz, L.
Ziętek, J.
Puk, K.
Adaszek, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/2087360.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Babesia canis
essential oil
natural product
Źródło:
Polish Journal of Veterinary Sciences; 2020, 23, 1; 161-163
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Conception, Connotation, and Essential Predication: Peter Auriol’s Conceptualism to the Test in II Sententiarum, d. 9, q. 2, art. 1
Autorzy:
Fornasieri, Giacomo
Powiązania:
https://bibliotekanauki.pl/articles/1621436.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
Tematy:
Peter Auriol
Connotation
Essential Predication
Conceptualism
Opis:
This paper comprises two parts. The first part is an introduction to Auriol’s moderate conceptualism, as it is presented in his Commentary on Book II of the Sentences, distinction 9, question 2, article 1. The second part is an edition of the text. In the introduction, I focus on Auriol’s use of the noetic tool of connotation. My thesis, in particular, is that connotation is a necessary prerequisite to his moderate conceptu alism. To this purpose, the first part of this introduction will be devoted to a brief presentation of Auriol’s conceptualism. In the second part, Auriol’s theory of essential predication will be presented. In the third part, I will present my claim that Auriol’s theory of essential predication can only be made sense of when read against the background of his theory of connotation as applied to intellectual cognition. Finally, I will offer a collation of Auriol’s Commentary on Book II of the Sentences, dis tinction 9, question 2, article 1, obtained by collating eight manuscripts, which hand down Auriol’s text, that is, Firenze, Biblioteca nazionale centrale, ms. Conv. Soppr. B.6.121, Firenze, ms. Conv. Soppr. A. 3.120, Napoli, Biblioteca nazionale, ms. VII.C.3, Padova, Biblioteca Antoniana, ms. 161, scaff. ix, Paris, Bibliothèque nationale de France, ms. latin 15867; Pelplin, Biblioteka Seminarium duchownego, ms. 46/85, Vaticano (Città del), Biblioteca Apostolica, ms. Borgiano 404, Vaticano (Città del), Biblioteca Apostolica, ms. Vat. lat. 942.
Źródło:
Analiza i Egzystencja; 2021, 54; 81-126
1734-9923
2300-7621
Pojawia się w:
Analiza i Egzystencja
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the spectrum of periodic perturbations of certain unbounded Jacobi operators
Autorzy:
Sahbani, J.
Powiązania:
https://bibliotekanauki.pl/articles/256015.pdf
Data publikacji:
2016
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
essential spectrum
spectral gap
periodic perturbation
Opis:
It is known that a purely off-diagonal Jacobi operator with coefficients [formula] has a purely absolutely continuous spectrum filling the whole real axis. We show that a 2-periodic perturbation of these operators creates a non trivial gap in the spectrum.
Źródło:
Opuscula Mathematica; 2016, 36, 6; 807-818
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of SPE for selective fractionation of essential oils constituents from plant materials
Autorzy:
Szewczyk, Joanna
Dybowski, Michał P.
Dawidowicz, Andrzej L.
Powiązania:
https://bibliotekanauki.pl/articles/764050.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
SPE
essential oils from herbs
fractionation
Opis:
Solid-phase extraction (SPE) is simple and inexpensive sample preparation procedure which can be applied for the isolation/fractionation of essential oil compounds from wide variety of samples, such as foodstuffs, biological and environmental. Due to the complex nature of the examined matrices and frequently low concentration level of target components, analytical procedures require the use of initial sample preparation stage. The paper shows the possibility of essential oil components fractionation from different plant materials using SPE method. The results presented in this paper shows that the proposed SPE procedure allows for easy and total fractionation of essential oil constituents (especially low-molecular oxygen compounds) from the sample matrix.
Źródło:
Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia; 2015, 70, 2
2083-358X
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 263

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