Wszystkie pola: Kaczanowski, Andrzej - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Ewolucja istotnych cech budowy organizmu zwierzęcego. Uwagi dotyczące ewolucji programu rozwoju zwierząt i dziedzictwa genetycznego człowieka
Evolution of major changes in animal morphology. Remarks on evolution of animal developmental program and on human genetic heritage
Autorzy:: Kaczanowski, Andrzej
Powiązania:: https://bibliotekanauki.pl/articles/1196083.pdf
Data publikacji:: 2009
Wydawca:: Polskie Towarzystwo Przyrodników im. Kopernika
Opis:: Evolution of complex organisms required additions of new gene loci and appearing of new functions by duplications of preexisting genes and subsequent diversification of duplicated copies. However, the number of genes in genome is surprisingly low in animal and human genomes, since it is limited by genetic load, which is a function of mutation rate and real number of genes,. The genetic information of a higher organism is organized in a very economical way. There is hierarchical regulation of genes transcription by transcription factors, and pathways of post translational regulation of activity of gene products that are common for the whole animal kingdom. The roles of hox genes, wnt/catenin and apoptosis pathways in animal development, evolution, and homology of genes involved in these regulations (ortolologous and paralogous) are discussed in this article. It may be speculated that a common ancestor of all animals contained a set of genes of developmental program which was prerequisite for animal evolution. There is some difficulty in explanation how extensive morphological changes could be favoured by natural selection. The problem of "macroevolution" may be reduced to evolution of developmental program. However, this evolution did not require special mechanisms not consistent with paradigms of the theory of evolution.
Źródło:: Kosmos; 2009, 58, 3-4; 403-416
0023-4249
Pojawia się w:: Kosmos
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Effects of Roscovitine on Schedule of Divisional Morphogenesis, Basal Bodies Proliferation and Cell Divisions in Tetrahymena thermophila
Autorzy:: Kaczanowska, Janina
Kiersnowska, Mauryla
Fabczak, Hanna
Kaczanowski, Szymon
Kaczanowski, Andrzej
Powiązania:: https://bibliotekanauki.pl/articles/763555.pdf
Data publikacji:: 2012
Wydawca:: Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Tematy:: Tetrahymena, roscovitine, basal bodies, morphogenesis, macronucleus, cdc14p
Opis:: During cell cycle of a ciliate Tetrahymena thermophila the divisions of micro- and macronucleus, cortical morphogenesis and cytokinesis are temporarily coordinated. Cortical morphogenesis begins with proliferation of the new ciliary basal bodies (BBs) within meridional cortical rows of ciliary BBs, and with the local proliferation of BBs, which form the new oral apparatus (OA2), positioned subequatorialy and destined for prospective posterior daughter cell (opisthe). Prior to cytokinesis, two prospective daughter cells are of equal size and show metamery of their cortical patterns. We studied effects of 20 μM roscovitine (an inhibitor of several cyclin-dependent kinases) on the cell cycle progression of T. thermophila. We showed that roscovitine delayed cell division, delayed or arrested macronuclear division and induced increase of cell size and the number of BBs in the cortical rows. The increase in the number of BBs in cortical rows induced cell elongation which was proportional to the increase in cell surface area. There was uncoupling between this BBs proliferation which is continued during prolonged cell cycle and delayed cytokinesis, what resulted in topological alteration of the respective positions of the OA2 and of the contractile vacuole pores (CVPs). In roscovitine treated cells, the new OA2 was positioned subequatorialy, but the fission zone was shifted posterior to the equatorial plane of the cell and positioned across and in the extreme cases behind of the new OA2. This resulted in the formation of a large proter and small size opisthe. The roscovitine treatment induced a formation of a plethora of phenotypes of postdividing cells. We found that irrespective of changes in divisional morphogenesis induced by roscovitine treatment, all mature BBs were associated with the cdc14-like phosphatase. Taken together all these data indicate that during cell cycle of T. thermophila the normal morphology of the daughter cells depends on the proper division of micro- and macronucleus and on temporal control of BBs proliferation along the longitudinal rows, during OA2 stomatogenesis and during selection of BBs involved in differentiation of apical BBs (couplets) and cell division.
Źródło:: Acta Protozoologica; 2012, 51, 2
1689-0027
Pojawia się w:: Acta Protozoologica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Materiality of Poetry: Words and Bodies/ Words and Pictures (Ewa Partum, Andrzej Tobis, Adam Kaczanowski)
Materialność poezji: słowa i ciała/ słowa i obrazy (Ewa Partum, Andrzej Tobis, Adam Kaczanowski)
Autorzy:: Kałuża, Anna
Powiązania:: https://bibliotekanauki.pl/articles/1009145.pdf
Data publikacji:: 2019-12-15
Wydawca:: Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:: poetry
new-materialist aesthetics
transmedia
artistic activities
poezja
nowomaterialistyczna estetyka
aktywność artystyczna
Opis:: The article discusses the possibilities of the emergence of a neo-materialistic aesthetics of the poem. Each of the analyzed examples—Ewa Partum’s active poetry, Adam Kaczanowski’s toy-art and Andrzej Tobis’s photographic archive—reveals different aspects of this aesthetics. The case of Partum shows that the material concreteness of poetry—today also associated with virtuality— requires other ways of perceiving / commenting / documenting the “poems” happening between the media. Active poetry consists in drawing the text (which eventually turns out to be a jigsaw made of letters) out of the formula of the finished object and making the medium of writing/language the material from which the object of artistic attention is “made”. I call Tobis’s project neo-materialistic, since it shows how we move from the human hybrid level we move to normalization and stabilization (and vice versa). Tobis seems to reach the moment when this normalization is actually happening and, at the same time, he shows levels of transformations, mutations and deviations. Kaczanowski “invents” for his poetry a medium different from the traditional record and the traditional form of the book. This principle of “invention” turns out to be very important, because it decides whether some materializations are poetic objects or not, without specifying any initial aesthetic, political and ideological criteria. In the most general terms this new-materialist aesthetics has been linked here with the transmedia horizon of art and the transformations of materialistic thinking made under the influence of the non-anthropocentric imagination.
W artykule zostały przedstawione możliwości zaistnienia nowomaterialistycznej estetyki wiersza. Każdy z analizowanych przykładów – poezja aktywna Ewy Partum, toy-art Adama Kaczanowskiego i słowno-fotograficzne archiwum Andrzeja Tobisa – ujawnia inne aspekty tej estetyki. Najogólniej jednak, nowomaterialistyczna estetyka powiązana została tu z transmedialnym horyzontem sztuki oraz z przeobrażeniami myślenia materialistycznego dokonanymi pod wpływem nieantropocentrycznej wyobraźni.
Źródło:: Praktyka Teoretyczna; 2019, 34, 4; 131-150
2081-8130
Pojawia się w:: Praktyka Teoretyczna
Dostawca treści:: Biblioteka Nauki