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Wyświetlanie 1-15 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
Tytuł:
The influence of water on the estimation of antioxidant properties of essential oils
Autorzy:
Olszowy, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/764073.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
antioxidant activity
essential oils
water impact
Opis:
This study discusses the influence of water content in measuring system on the estimation of antioxidant activity of essential oils. The presented data show that the antioxidant activity of thyme, clove, summer savory and basil essential oils strongly depends on water concentration what has important impact on the estimation of correct and reliable antioxidant activity of examined essential oils.
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
Tytuł:
Effects of essential oils and their combinations added to broiler diets on the mineral contents of some tissues and bone breaking strength
Autorzy:
Sevim, B.
Cufadar, Y.
Powiązania:
https://bibliotekanauki.pl/articles/2119510.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Zootechniczne
Tematy:
broiler
diet
essential oil
bone
mineral
Opis:
The current research was conducted to determine the effect of thyme (Thymus vulgaris L.), rosemary (Rosmarinus officinalis L.), and French lavender (Lavandula stoechas L.) essential oils and their combinations on serum, bone and excreta mineral content and bone breaking strength in broilers. A total of 640 day-old broiler chicks (Ross 308) were randomly allocated to eight treatment groups with five replicates each. The experimental diets were prepared by adding essential oils to the control diet as follows: control (0 mg/kg), thyme essential oil (50 mg/kg), rosemary essential oil (50 mg/kg), French lavender essential oil (50 mg/kg), thyme + rosemary (25+25 mg/kg), thyme + French lavender (25+25 mg/kg), rosemary + French lavender (25+25 mg/kg) and thyme + rosemary + French lavender (16,7+16,7+16,7 mg/kg). No difference was shown between the treatment groups in serum content of Ca, Mg, P or Zn (P > 0,05). Tibia Ca, Mg and P contents were statistically significant (P < 0,01), while tibia breaking strength was not significant (P > 0,05). Excreta Ca, Fe, Mg, Mn, P and Zn contents were significantly affected by the dietary treatments (P < 0,01), but excreta Cu content was not statistically significant (P > 0,05). The addition of thyme essential oil to the diet was effective in increasing tibia Ca, P and Mg content. The essential oils used, especially their binary mixtures, can be effective in reducing the amount of minerals excreted in the faeces.
Źródło:
Roczniki Naukowe Polskiego Towarzystwa Zootechnicznego; 2021, 17, 3; 59-69
1733-7305
Pojawia się w:
Roczniki Naukowe Polskiego Towarzystwa Zootechnicznego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The obligations of public entities within the national cybersecurity system
Autorzy:
Karpiuk, Mirosław
Powiązania:
https://bibliotekanauki.pl/articles/2159295.pdf
Data publikacji:
2021-03-04
Wydawca:
Akademia Sztuki Wojennej
Tematy:
cybersecurity
information system
incident
essential service
Opis:
The lawmakers have imposed a number of obligations on public entities within the national cybersecurity system to ensure that information systems are resilient against actions which compromise the confidentiality, integrity, accessibility, and authenticity of the data being processed in these systems, or the related services provided by such systems. These obligations include incident reporting and handling by the appropriate public entities, and designating contact persons to communicate with national cybersecurity system entities. However, they do not apply to all public bodies – only those specifically named by the lawmakers. An important spectrum of measures in this regard involves public-entity incidents, i.e. occurrences which impair, or might impair, the quality of, or disrupt the performance of, a public function by a public entity. When fulfilling their obligations, it is particularly important for public entities to handle incidents, understood as taking measures to identify, register, analyse, classify, prioritise, contain, and remedy the incidents.
Źródło:
Cybersecurity and Law; 2020, 4, 2; 57-72
2658-1493
Pojawia się w:
Cybersecurity and Law
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Antifungal Activity of Finished Chromium Tanned Leather Containing Thyme and Tea Tree Essential Oils
Autorzy:
Gendaszewska, Dorota
Wionczyk, Barbara
Bednarek, Agata
Boniecki, Paweł
Powiązania:
https://bibliotekanauki.pl/articles/2172003.pdf
Data publikacji:
2022
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:
essential oil
antifungal activity
leather
microorganisms
Opis:
Leather products provide an ideal environment for microbial growth. In order to prevent the appearance and spread of various types of microorganisms, it is treated with selected biocides and even essential oils. The aim of this paper was to investigate the antifungal activity of selected essential oils applied to finished chromium tanned leather which is intended for leather fancy products. Antifungal activity was evaluated according to the PN-EN 14119: 2005 standard. Four finished chromium tanned leathers were tested, each of which was soaked in the following essential oils: tea tree essential oil at a concentration of 1, 2 and 5% and thyme essential oil at concentration of 1, 2 and 5%. The results obtained indicated that leather finishing with thyme essential oil showed the antimicrobial activity against Aspergillus niger, Chaetomium globosum and Candida albicans strains. The application of 5% thyme essential oil to leather samples inhibited the growth of all strains tested. Using tea tree essential oil on leather samples showed a antimicrobial effect only against Candida albicans. The application of essential oils in the leather finishing process may be an alternative to biocides used in the tanning industry.
Źródło:
Fibres & Textiles in Eastern Europe; 2022, 3 (151); 41--45
1230-3666
2300-7354
Pojawia się w:
Fibres & Textiles in Eastern Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of the fungicidal properties of essential oils from Leptospermum scoparium and Azadirachta indica in relation to selected fungi causing wood decay
Autorzy:
Świstak, Joanna
Betlej, Izabela
Powiązania:
https://bibliotekanauki.pl/articles/2200175.pdf
Data publikacji:
2020
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
essential oils
fungicides
wood rotting fungi
Opis:
Evaluation of the fungicidal properties of essential oils from Leptospermum scoparium and Azadirachta indica in relation to selected fungi causing wood decay. The publication presents the results of evaluation of the fungicidal effect of two essential oils from Leptospermum scoparium (manuka) and Azadirachta indica (neem) on fungi that cause the decomposition of Trametes versicolor and Coniophora puteana wood. Research results indicate that the growth of the tested fungi is clearly inhibited with the participation of the highest concentrations of essential oils used. At the same time, it was found that the action of neem oil was stronger compared to the Traetes versicolor fungus. In contrast, manuka essential oil has a stronger inhibitory effect on the growth of Coniophora puteana.
Ocena właściwosci grzybobójczych olejków z Leptospermum scoparium i Azadirachta indica w stosounku do wybranych grzybów powodujacych rozkład drewna. W publikacji przedstawiono wyniki oceny działania fungicydowego dwóch olejków eterycznych z L. scoparium (manuka) i A. indica (neem) na grzyby powodujące rozkład drewna Trametes versicolor i Coniophora puteana. Rezultaty badań wskazują, że wzrost testowanych grzybów jest wyraźnie hamowany przy udziale największych z zastosowanych stężeń badanych substancji chemicznych. Jednocześnie stwierdzono, że działanie olejku neem było mocniejsze w stosounku do grzyba T. versicolor. Z kolei olejek manuka działał silniej inhibujaco na wzrost grzyba C. puteana.
Źródło:
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology; 2020, 110; 118--125
1898-5912
Pojawia się w:
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 263

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