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Wyświetlanie 1-15 z 1052
Tytuł:
Dominating analytic families
Autorzy:
Kamburelis, Anastasis
Powiązania:
https://bibliotekanauki.pl/articles/1205372.pdf
Data publikacji:
1998
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
measure algebra
Cohen algebra
Suslin c.c.c. forcing
distributivity
Opis:
Let A be an analytic family of sequences of sets of integers. We show that either A is dominated or it contains a continuum of almost disjoint sequences. From this we obtain a theorem by Shelah that a Suslin c.c.c. forcing adds a Cohen real if it adds an unbounded real.
Źródło:
Fundamenta Mathematicae; 1998, 156, 1; 73-83
0016-2736
Pojawia się w:
Fundamenta Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Deficiency and Forbidden Subgraphs of Connected, Locally-Connected Graphs
Autorzy:
Li, Xihe
Wang, Ligong
Powiązania:
https://bibliotekanauki.pl/articles/32083830.pdf
Data publikacji:
2020-02-01
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
05C40
05C70
Opis:
A graph $G$ is locally-connected if the neighbourhood $ N_G (v) $ induces a connected subgraph for each vertex $v$ in $G$. For a graph $G$, the deficiency of $G$ is the number of vertices unsaturated by a maximum matching, denoted by $ \text{def} (G) $. In fact, the deficiency of a graph measures how far a maximum matching is from being perfect matching. Saito and Xiong have studied subgraphs, the absence of which forces a connected and locally-connected graph $G$ of sufficiently large order to satisfy $ \text{def} (G) \le 1 $. In this paper, we extend this result to the condition of $ \text{def} (G) \le k $, where k is a positive integer. Let $ \beta_0 = \ceil{ 1/2 (3+\sqrt{8k+17} ) } −1 $, we show that $ K_{1,2}, K_{1,3}, . . ., K_{1,β_0}, K_3 $ or \( K_2 \lor 2K_1 \) is the required forbidden subgraph. Furthermore, we obtain some similar results about 3-connected, locally-connected graphs. Key Words: deficiency, locally-connected graph, matching, forbidden subgraph.
Źródło:
Discussiones Mathematicae Graph Theory; 2020, 40, 1; 195-208
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Does C* -embedding imply C*-embedding in the realm of products with a non-discrete metric factor?
Autorzy:
Gutev, Valentin
Ohta, Haruto
Powiązania:
https://bibliotekanauki.pl/articles/1205113.pdf
Data publikacji:
2000
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
C-embedding
C*-embedding
product space
metric space
Opis:
The above question was raised by Teodor Przymusiński in May, 1983, in an unpublished manuscript of his. Later on, it was recognized by Takao Hoshina as a question that is of fundamental importance in the theory of rectangular normality. The present paper provides a complete affirmative solution. The technique developed for the purpose allows one to answer also another question of Przymusiński's.
Źródło:
Fundamenta Mathematicae; 2000, 163, 3; 241-265
0016-2736
Pojawia się w:
Fundamenta Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Resonance Tunneling in Ferromagnet-Triplet Superconductors Junctions
Autorzy:
Kowalewski, L.
Wojciechowski, R. J.
Wojtuś, P.
Powiązania:
https://bibliotekanauki.pl/articles/2047330.pdf
Data publikacji:
2007-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
74.70.Pq
73.40.-c
74.45.+c
Opis:
We discuss the tunneling conductance in a ferromagnet-insulator-triplet superconductor junction. We consider the superconducting order parameters with spin triplet pairing having nodes. The nodal structure of the order parameter has been recently confirmed experimentally in Sr$\text{}_{2}$RuO$\text{}_{4}$. In particular, we study how a mid-gap structure of the tunnelling conductance depends on the phase difference of the pairing potential as well as on the orientation of the interface.
Źródło:
Acta Physica Polonica A; 2007, 111, 5; 683-691
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis of 11C-methionine through gas phase iodination using Synthra MeIPlus synthesis module
Autorzy:
Kilian, K.
Pękal, A.
Juszczyk, J.
Powiązania:
https://bibliotekanauki.pl/articles/148779.pdf
Data publikacji:
2016
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
11C-methionine
11C-radiopharmaceuticals
gas phase iodination
Opis:
A method of 11C-methionine synthesis using ‘bubbling’ method is presented. 11C-methionine was synthesized via 11C methylation from L-cysteine thiolactone (2 mg) in a 300 L solution of 2:1:1 (v/v) 1 M NaOH, ethanol, and water at ambient temperature (85°C, 5 min). The radiochemical purity of radiotracer was higher than 99% and enantiomeric purity (L-11C-methionine) was 91.6 ± 0.4%. The fi nal product met the requirements of European Pharmacopoeia monograph. The proposed 11C-methionine synthesis is a reliable tool for routine manufacturing in clinical applications and animal studies.
Źródło:
Nukleonika; 2016, 61, 1; 29-33
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
*-g-frames in tensor products of Hilbert C*-modules
Autorzy:
Rossafi, Mohamed
Kabbaj, Samir
Powiązania:
https://bibliotekanauki.pl/articles/744687.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Pedagogiczny im. Komisji Edukacji Narodowej w Krakowie
Tematy:
g-frame
*-g-frame
C*-algebra
Hilbert C*-modules
Źródło:
Annales Universitatis Paedagogicae Cracoviensis. Studia Mathematica; 2018, 17
2300-133X
Pojawia się w:
Annales Universitatis Paedagogicae Cracoviensis. Studia Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Principles Creation Integrated On-Line Access System for Free Standing Renewable Energy Technology (RET)
Autorzy:
Kisseleva, O.
Akhmetov, B.
Kharitonov, P.
Powiązania:
https://bibliotekanauki.pl/articles/1402006.pdf
Data publikacji:
2015-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
89.70.+C
Opis:
This paper presents the development of the structure of the integrated ON-LINE information system for collective use of renewable energy. Information about each installation including its location identification and capacity which is potentially available for external users is accessible via internet. Structure of each installation will include an intellectual control and registration module (ICRM) for electric energy available to external users. Where necessary any consumer can request reserve energy generated in near-by located free standing istallations for external use and make a decision to approach to any of those installation.
Źródło:
Acta Physica Polonica A; 2015, 128, 2B; B-258-B-259
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
MIS-Microstructure with Periodic Field Electrodes. A New Type of Dynamic Superlattice
Autorzy:
Trale, I. E.
Powiązania:
https://bibliotekanauki.pl/articles/1887577.pdf
Data publikacji:
1991-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.40.-c
Opis:
The electron movement in thin semiconductor layer adjoining interface semiconductor-insulator in metal-insulator-semiconductor (MIS) microstructure with periodic field electrodes is considered. If a voltage of some sufficiently high frequency is applied to such a structure the effect of this high frequency field on a charge carriers in semiconductor is equivalent, in a sense, to the effect of some time-independent effective potential which is a sequence of deep "dynamic" quantum wells, where the charge carriers are localized. It is shown that the electron resonant tunneling may occur in this structure.
Źródło:
Acta Physica Polonica A; 1991, 79, 5; 699-705
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sonolysis and Sonoacidification οf Ultrasonic Disintegration οf Excess Sludge
Autorzy:
Zielewicz, E.
Powiązania:
https://bibliotekanauki.pl/articles/1811568.pdf
Data publikacji:
2008-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
43.35.-c
Opis:
The expected effect of ultrasonic disintegration of excess sludge is particle dispergation and cell lysis i.e. the elimination of sludge microorganisms and the release of the contents of dead cells into the sludge liquid which results in an increase in chemical oxygen demand. Sonolysis also formed the basis for the intensification of volatile fatty acids production during the acid fermentation of excess sludge treated ultrasonically. In this study the investigations into the direct effects of excess sludge ultrasonic treatment revealed an increase in volatile fatty acid concentration directly (without fermentation process) after the ultrasonic treatment which is closely related to sonolysis.
Źródło:
Acta Physica Polonica A; 2008, 114, 6A; A-259-A-264
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Banach space \(D(0, 1)\) is primary
Autorzy:
Michalak, Artur
Powiązania:
https://bibliotekanauki.pl/articles/745294.pdf
Data publikacji:
2005
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
C(K)-spaces
Opis:
We show that the Banach space \(D(0, 1)\) of all scalar (real or complex) functions on \([0, 1)\) that are right continuous at each point of \([0, 1)\) with left-hand limit at each point of \((0, 1]\) equipped with the uniform convergence topology is primary.
Źródło:
Commentationes Mathematicae; 2005, 45, 1
0373-8299
Pojawia się w:
Commentationes Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On some properties of quotients of homogeneous C(K) spaces
Autorzy:
Michalak, Artur
Powiązania:
https://bibliotekanauki.pl/articles/729591.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
nonseparable C(K) spaces
quotients of C(K) spaces
Opis:
We say that an infinite, zero dimensional, compact Hausdorff space K has property (*) if for every nonempty open subset U of K there exists an open and closed subset V of U which is homeomorphic to K. We show that if K is a compact Hausdorff space with property (*) and X is a Banach space which contains a subspace isomorphic to the space C(K) of all scalar (real or complex) continuous functions on K and Y is a closed linear subspace of X which does not contain any subspace isomorphic to the space C([0,1]), then the quotient space X/Y contains a subspace isomorphic to the space C(K).
Źródło:
Discussiones Mathematicae, Differential Inclusions, Control and Optimization; 2016, 36, 1; 33-43
1509-9407
Pojawia się w:
Discussiones Mathematicae, Differential Inclusions, Control and Optimization
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electric Load in the G12 Tariff for Consumers Assigned to the PTPiREE C-profile
Obciążenie elektryczne w strefach taryfy G12 odbiorców zaliczanych do profilu typu C PTPiREE
Autorzy:
Frąckowiak, R.
Gałan, T.
Powiązania:
https://bibliotekanauki.pl/articles/397334.pdf
Data publikacji:
2014
Wydawca:
ENERGA
Tematy:
load curves
C-profile
modeling
obciążenie
profil C
modelowanie
Opis:
In the paper, the results of analysis of the load curves for individual consumers assigned to the C-type standard profile in the G12 tariff zone and subzones are presented. On this basis, the C-profile study has been carried out for selected years. Also, models showing the influence of the air temperature on the consumed energy quotes for the distinctive consumer groups have been developed. Conclusions on the development and application of the standard profile for consumers which use the electrical energy for heating purposes (rooms and tap water) have been drawn.
W artykule autorzy przedstawili wyniki analizy krzywych obciążenia odbiorców indywidualnych, zaliczanych do profilu standardowego typu C w strefach i podstrefach taryfy G12. Pozwoliły one na przeprowadzenie analizy profilu C dla wybranych lat. Opracowano także modele charakteryzujące wpływ temperatury powietrza na wartości zużywanej energii dla wydzielonych grup odbiorców. Sformułowano wnioski dotyczące tworzenia oraz korzystania z profilu standardowego dla odbiorców wykorzystujących energię elektryczną do ogrzewania pomieszczeń oraz wody użytkowej.
Źródło:
Acta Energetica; 2014, 3; 41-54
2300-3022
Pojawia się w:
Acta Energetica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Interaction of an anticancer ruthenium complex HInd[RuInd2Cl4] with cytochrome c.
Autorzy:
Trynda-Lemiesz, Lilianna
Powiązania:
https://bibliotekanauki.pl/articles/1043344.pdf
Data publikacji:
2004
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
cytochrome c
Ruthenium(III) complexes
circular dichroism
apocytochrome c
Opis:
Cytochrome c is an important electron transfer protein in the respiratory chain, shuttling electrons from cytochrome c reductase to cytochrome c oxidase. Extensive chemical modification studies indicate significant electrostatic interactions between these proteins and show that all structural and conformational changes of cytochrome c can influence the electron transport. In the present work we examine the effect of an anticancer ruthenium complex, trans-Indazolium (bisindazole) tetrachlororuthenate(III) (HInd[RuInd2Cl4]), on the conformation of cytochrome c, the state of the heme moiety, formation of the protein dimer and on the folding state of apocytochrome c. For this purpose, gel-filtration chromatography, absorption second derivative spectroscopy, circular dichroism (CD) and inductively coupled plasma atomic emission spectroscopy (ICP(AES)) were used. The present data have revealed that binding of the potential anticancer drug HInd[RuInd2Cl4] complex to cytochrome c induces a conformation of the protein with less organized secondary and tertiary structure.
Źródło:
Acta Biochimica Polonica; 2004, 51, 1; 199-205
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Abnormal FHIT gene transcript and c-myc and c-erbB2 amplification in breast cancer.
Autorzy:
Kowara, Renata
Gołębiowski, Filip
Chrzan, Paweł
Skokowski, Jaroslaw
Karmolinski, Andrzej
Pawełczyk, Tadeusz
Powiązania:
https://bibliotekanauki.pl/articles/1043760.pdf
Data publikacji:
2002
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
amplification
c-myc
FHIT transcripts
breast cancer
c-erbB2
Opis:
Searching for ways to improve the characterization of breast cancer we examined the relationship between the status of the FHIT gene transcript and amplification of c-myc and the c-erbB2 oncogene. Abnormal FHIT transcript was detected in 32 of 79 cancers examined. The presence of Fhit protein estimated by Western blots was evident only in cancers exhibiting a normal-sized FHIT transcript. This indicates that abnormal FHIT transcripts observed in our study did not encode any Fhit protein or the amount of such protein was very low. There was no association between the presence of aberrant FHIT gene transcript with age, tumor size, estrogen and progesterone receptor status, local metastases and histological grading. However, the abnormalities in FHIT gene transcripts were observed with different frequency depending on the histopathological type of the tumor. The aberrant FHIT transcript was detected in 60% of lobular cancers and only in 28% of ductal cancers. Analyzing the occurrence of c-myc and c-erbB2 amplification and the presence of aberrant FHIT gene transcripts we found that the aberrant FHIT transcript more frequently occurred in tissues with c-myc amplification. There was a significant (P <0.05) correlation between the occurrence of the aberrant FHIT gene transcript with accompanying c-myc amplification and positive lymph node status. However, in order to evaluate the predictive value of these findings in breast cancer, an extended clinical follow up will be necessary.
Źródło:
Acta Biochimica Polonica; 2002, 49, 2; 341-350
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Carbon isotope effects in the studies of the mechanism of action of tyrosine phenol-lyase
Autorzy:
Augustyniak, W.
Kański, R.
Kańska, M.
Powiązania:
https://bibliotekanauki.pl/articles/148527.pdf
Data publikacji:
2006
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
12C/14C kinetic isotope effects
tyrosine phenol-lyase
Opis:
12C/14C kinetic isotope effects on the hydrolytic cleavage of tyrosine to phenol and ammonium pyruvate catalyzed by Citrobacter freundii tyrosine phenol-lyase have been determined in positions 2, 3 and ring-1' of L-tyrosine. The competitive method with dual-label approach was applied with 3',5'-ring 3H as remote label. The results revealed the change of the effect on carbon atom in position 2 during the reaction course from the high normal values to low inverse values. On the other hand, the effect values on 3 and ring-1' position remained constant during the reaction course. The discussion of these results regarding the reaction mechanism is presented.
Źródło:
Nukleonika; 2006, 51,suppl.2; 7-11
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 1052

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