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Wyświetlanie 1-15 z 19
Tytuł:
On group nil rings
Autorzy:
Puczyłowski, E.
Powiązania:
https://bibliotekanauki.pl/articles/1364513.pdf
Data publikacji:
1976
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Źródło:
Fundamenta Mathematicae; 1976, 92, 1; 17-23
0016-2736
Pojawia się w:
Fundamenta Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nil, nilpotent and PI-algebras
Autorzy:
Müller, Vladimír
Powiązania:
https://bibliotekanauki.pl/articles/1360834.pdf
Data publikacji:
1994
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Opis:
The notions of nil, nilpotent or PI-rings (= rings satisfying a polynomial identity) play an important role in ring theory (see e.g. [8], [11], [20]). Banach algebras with these properties have been studied considerably less and the existing results are scattered in the literature. The only exception is the work of Krupnik [13], where the Gelfand theory of Banach PI-algebras is presented. However, even this work has not get so much attention as it deserves.
The present paper is an attempt to give a survey of results concerning Banach nil, nilpotent and PI-algebras.
The author would like to thank to J. Zemánek for essential completion of the bibliography.
Źródło:
Banach Center Publications; 1994, 30, 1; 259-265
0137-6934
Pojawia się w:
Banach Center Publications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nil-extensions of completely simple semirings
Autorzy:
Maity, Sunil
Ghosh, Rituparna
Powiązania:
https://bibliotekanauki.pl/articles/729071.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
ideal extension
nil-extension
bi-ideal
completely Archimedean semirings
completely simple semiring
Opis:
A semiring S is said to be a quasi completely regular semiring if for any a ∈ S there exists a positive integer n such that na is completely regular. The present paper is devoted to the study of completely Archimedean semirings. We show that a semiring S is a completely Archimedean semiring if and only if it is a nil-extension of a completely simple semiring. This result extends the crucial structure theorem of completely Archimedean semigroup.
Źródło:
Discussiones Mathematicae - General Algebra and Applications; 2013, 33, 2; 201-209
1509-9415
Pojawia się w:
Discussiones Mathematicae - General Algebra and Applications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Splitting obstructions and properties of objects in the Nil categories
Autorzy:
Koźniewski, Tadeusz
Powiązania:
https://bibliotekanauki.pl/articles/1205229.pdf
Data publikacji:
1999
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Opis:
We show that the objects of Bass-Farrell categories which represent 0 in the corresponding Nil groups are precisely those which are stably triangular. This extends to Waldhausen's Nil group of the amalgamated free product with index 2 factors. Applications include a description of Cappell's special UNil group and reformulations of those splitting and fibering theorems which use the Nil groups.
Źródło:
Fundamenta Mathematicae; 1999, 161, 1-2; 155-165
0016-2736
Pojawia się w:
Fundamenta Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Involvement of ABA in flower induction of Pharbitis nil
Autorzy:
Wilmowicz, E.
Frankowski, K.
Glazinska, P.
Kesy, J.
Kopcewicz, J.
Powiązania:
https://bibliotekanauki.pl/articles/59048.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
environmental factor
Pharbitis nil
abscisic acid
flower induction
flowering
cotyledon
botany
plant
hormone
seedling
Opis:
Flowering of plants is controlled by hormones among which both stimulators and inhibitors are present. The role of abscisic acid (ABA) in flower induction of the short day plant Pharbitis nil was shown in our experiments through exogenous applications and endogenous level determination of the hormone in cotyledons of seedlings grown under special light conditions. The application of ABA to cotyledons or shoot apices during the first half of a 24-h long inductive night inhibits flowering. The same compound applied towards the end of or after a 14-h long subinductive night increases the number of flower buds produced by these plants. Exposing P. nil seedlings at the beginning of a 24-h long inductive night to far red light (FR) decreases the level of endogenous abscisic acid in cotyledons and leads to flower inhibition. However, a pulse of red light (R) reversing the inhibitory effect of far red light on the flowering of P. nil increases the ABA content. The results obtained confirm previous observations that ABA may play a dual and an important role in the regulation of floral bud formation in P. nil. The flowering occurs when the level of endogenous abscisic acid is low at the beginning and is high toward the end of the inductive night.
Źródło:
Acta Societatis Botanicorum Poloniae; 2011, 80, 1
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Waldhausen’s Nil groups and continuously controlled K-theory
Autorzy:
Munkholm, Hans
Prassidis, Stratos
Powiązania:
https://bibliotekanauki.pl/articles/1205232.pdf
Data publikacji:
1999
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Opis:
Let $Γ = Γ_1 *_G Γ_2$ be the pushout of two groups $Γ_i$, i = 1,2, over a common subgroup G, and H be the double mapping cylinder of the corresponding diagram of classifying spaces $BΓ_1 ← BG ← BΓ_2$. Denote by ξ the diagram $I {p \over ←} H {1 \over →} X = H$, where p is the natural map onto the unit interval. We show that the $Nil^∼$ groups which occur in Waldhausen's description of $K_*(ℤΓ)$ coincide with the continuously controlled groups $\widetildeK^{cc}_*(ξ)$, defined by Anderson and Munkholm. This also allows us to identify the continuously controlled groups $\widetildeK^{cc}_*(ξ^+)$ which are known to form a homology theory in the variable ξ, with the "homology part" in Waldhausen's description of $K_{*-1}(ℤ Γ)$. A similar result is also obtained for HNN extensions.
Źródło:
Fundamenta Mathematicae; 1999, 161, 1-2; 217-224
0016-2736
Pojawia się w:
Fundamenta Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hot Formability of Heat-Resistant Stainless Steel X15CrNiSi20-12
Autorzy:
Kawulok, R.
Schindler, I.
Navrátil, H.
Ševčák, V.
Sojka, J.
Konečná, K.
Chmiel, B.
Powiązania:
https://bibliotekanauki.pl/articles/355196.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
heat-resistant stainless steel
hot tension test
nil strength temperature
nil ductility temperature
Opis:
High-temperature plastic properties of heat-resistant stainless steel X15CrNiSi20-12 were assessed on the basis of hot tensile tests and nil strength tests. The results were supported by metallographic analyses using SEM and EDX analysis. The formability of the investigated steel can be divided into roughly three temperature areas. In the temperature range of 900°C to about 1050°C, formability was negatively affected by precipitation of carbide particles at grain boundaries. As the temperature rose to 1200°C, these particles dissolved, resulting in an increase in formability. Further temperature increases resulted in a relatively steep drop in formability caused by overheating of the material. The nil ductility temperature of 1280°C and the nil-strength temperature of 1362°C were determined. The Plastic and strength properties of the investigated material were compared with the deformation behavior of the reference steel X5CrNi18-10, which shows a significantly wider range of suitable forming temperatures.
Źródło:
Archives of Metallurgy and Materials; 2020, 65, 2; 727-734
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wounding stimulates allene oxide synthase gene and increases the level of jasmonic acid in Ipomoea nil cotyledons
Autorzy:
Wilmowicz, E.
Kucko, A.
Frankowski, K.
Zabrocka-Nowakowska, B.
Panek, K.
Kopcewicz, J.
Powiązania:
https://bibliotekanauki.pl/articles/58535.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
allene oxide synthase
gene expression
jasmonic acid
jasmonate
phytohormone
Ipomoea nil
cotyledon
Opis:
Allene oxide synthase (AOS) encodes the first enzyme in the lipoxygenase pathway, which is responsible for jasmonic acid (JA) formation. In this study we report the molecular cloning and characterization of InAOS from Ipomoea nil. The full-length gene is composed of 1662 bp and encodes for 519 amino acids. The predicted InAOS contains PLN02648 motif, which is evolutionarily conserved and characteristic for functional enzymatic proteins. We have shown that wounding led to a strong stimulation of the examined gene activity in cotyledons and an increase in JA level, which suggest that this compound may be a modulator of stress responses in I. nil.
Źródło:
Acta Societatis Botanicorum Poloniae; 2016, 85, 1
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Involvement of the IAA-regulated ACC oxidase gene PnACO3 in Pharbitis nil flower inhibition
Autorzy:
Wilmowicz, E.
Frankowski, K.
Kucko, A.
Kesy, J.
Kopcewicz, J.
Powiązania:
https://bibliotekanauki.pl/articles/19595.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Źródło:
Acta Biologica Cracoviensia. Series Botanica; 2014, 56, 1
0001-5296
Pojawia się w:
Acta Biologica Cracoviensia. Series Botanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
What do Pre-Service Teachers Think about Science Journals and Journal Writing?
Autorzy:
Duban, Nil Yildiz
Powiązania:
https://bibliotekanauki.pl/articles/2028717.pdf
Data publikacji:
2014-03-31
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
pre-service teachers
science and technology teaching
science journals
journal writing
Opis:
The aim of this study was to obtain information on pre-service teachers’ experiences and viewpoints on science journals and journal writing. The current study utilized a qualitative research method, namely phenomenography. The data were collected by conducting face to face semi-structured interviews. The analysis of the verbatim transcripts of pre-service teachers’ interviews was performed with the use of the phenomenographic method. The findings are presented as themes, subthemes and categories. The participants in the study commented on the content of science journals, usefulness of journal writing in science courses and using science journals in primary education based on their observations during the practical activities at schools.
Źródło:
The New Educational Review; 2014, 35; 225-235
1732-6729
Pojawia się w:
The New Educational Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Auxin increases the InJMT expression and the level of JAMe–inhibitor of flower induction in Ipomoea nil
Autorzy:
Kucko, A.
Czeszewska-Rosiak, G.
Wolska, M.
Glazinska, P.
Kopcewicz, J.
Wilmowicz, E.
Powiązania:
https://bibliotekanauki.pl/articles/57436.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Botaniczne
Opis:
Interactions among jasmonates and auxin in the photoperiodic flower induction of a short-day plant Ipomoea nil were examined. Therefore, we measured changes in jasmonic acid (JA) and jasmonic acid methyl ester (JAMe) levels in the cotyledons of I. nil during the inductive night, as well as the effects of indole-3-acetic acid (IAA) on their content. We noticed an interesting result, that IAA applied on the cotyledons of I. nil is an effective stimulator of JAMe production in seedlings cultivated under inductive night conditions. IAA treatment also significantly increased the transcriptional activity of InJMT (JASMONIC ACID CARBOXYL METHYLTRANSFERASE), while did not affect the expression of JA biosynthesis genes (lipoxyganease, allene oxide synthase, 12-oxophytodienoate reductase). These data, as well as the results of our previous research, suggest that exogenous IAA participates in I. nil flower induction process by stimulating InJMT expression and, as a consequence of that, enhancing the level of JAMe, a flowering inhibitor.
Źródło:
Acta Societatis Botanicorum Poloniae; 2017, 86, 1
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 19

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