Zobrazeno 1 - 10
of 26
pro vyhledávání: '"Adam Urbanek"'
Publikováno v:
Acta Palaeontologica Polonica. 57:589-611
Urbanek, A., Radzevicius, S., Kozlowska, A., and Teller, L. 2012. Phyletic evolution and iterative speciation in the per− sistent Pristiograptus dubius lineage. Acta Palaeontologica Polonica 57 (3): 589–611. The paper focuses on patterns of the e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9a53ebddbfba91cf26534616a195d099
https://doi.org/10.4202/app.2010.0070
https://doi.org/10.4202/app.2010.0070
Autor:
Piotr Mierzejewski, Adam Urbanek
Publikováno v:
Acta Palaeontologica Polonica. 54:243-252
Dissepiments or connecting bars between adjacent stipes in rhabdosomes of dendroid graptolites were studied by means of electron microscopy (SEM and TEM). The material, chemically isolated from rock matrix, originating from the Ordovician of Estonia
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5955113f72418618d94047bfcc25f82b
https://doi.org/10.4202/app.2006.0020
https://doi.org/10.4202/app.2006.0020
Publikováno v:
Bulletin of Geosciences. :21-26
Bates, D. E. B., Kozlowska, A., Loydell, D., Urbanek, A., Wade, S. (2009). Ultrastructural observations on some dendroid and graptoloid graptolites and on Mastigograptus. Bulletin of Geosciences, 84, (1), 21-26.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2b1308df98751b4ef0e9d5bac0ad3177
https://doi.org/10.3140/bull.geosci.1110
https://doi.org/10.3140/bull.geosci.1110
Publikováno v:
Journal of Environmental Management. 78:200-208
The Indiana Harbor (Indiana, USA) has not been dredged since 1972 due to lack of a suitable disposal site for dredged sediment. As a result of this, over a million cubic yards of highly contaminated sediment has accumulated in the harbor. Recently, t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::47c65c3d7eaf8aa2db2c4241556470fe
https://doi.org/10.1016/j.jenvman.2005.04.018
https://doi.org/10.1016/j.jenvman.2005.04.018
Autor:
Adam Urbanek
Publikováno v:
Biology Bulletin of the Russian Academy of Sciences. 30:1-8
Based on the theory of organization and evolution of colonies in an extinct group of hemichordate graptolites (Urbanek, 1960, 1990) the relationship between the events in the late astogeny of bryozoan colonies and their somatic and reproductive cycle
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::34eebc5c06f9e5c96f10342e6da2cd73
https://doi.org/10.1023/a:1022045523949
https://doi.org/10.1023/a:1022045523949
Autor:
Adam Urbanek, Wojciech Szeligiewicz
Publikováno v:
Lethaia. 27:313-316
Earlier models of the morphogenesis in graptoloid colonies can be improved by taking into account the rate of growth and budding. It is assumed that both these factors are controlled by a specific function of the morphogen, here called for convenienc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1615de055d42459545e5b61d51691b2c
https://doi.org/10.1111/j.1502-3931.1994.tb01580.x
https://doi.org/10.1111/j.1502-3931.1994.tb01580.x
Autor:
Adam Urbanek
Publikováno v:
Historical Biology. 7:29-50
Four major biotic crises are recognized in the history of the Upper Silurian graptoloids. While the causes of extinction are largely unknown, the scenarios of the crises are fairly well ascertained. A model of recovery proposed here implies two alter
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3a8025b4ce86ca53a8745408b0bdeec8
https://doi.org/10.1080/10292389309380442
https://doi.org/10.1080/10292389309380442
Autor:
Adam Urbanek, Piotr Mierzejewski
Publikováno v:
Lethaia. 24:129-137
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8d5456f98f58a6e3e6bfdd68f802ca0d
https://doi.org/10.1111/j.1502-3931.1991.tb01460.x
https://doi.org/10.1111/j.1502-3931.1991.tb01460.x
Autor:
Adam Urbanek
Publikováno v:
Lethaia. 23:333-340
Urbanek, A. 1990 10 15: Reproductive strategy and the life cycle in graptoloid colonies. Lethaia, Vol. 23, pp. 333–340. Oslo. ISSN 0024–1164. Graptoloid colonies were clones composed in all probability of hermaphroditic zooids. Their breeding sys
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b82228615a3b5871bee795faad22356e
https://doi.org/10.1111/j.1502-3931.1990.tb01366.x
https://doi.org/10.1111/j.1502-3931.1990.tb01366.x
Autor:
Adam Urbanek, Janusz Uchmanski
Publikováno v:
Paleobiology. 16:49-61
Morphological gradients in graptoloid colonies are explained by the production and diffusion of a morphogen from the sicula distalwards. Size of the thecae is inversely related to the amount of morphogen present. The graduate decrease of morphogen is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::995c443b3c3c99966a4ca89d4e011f57
https://doi.org/10.1017/s0094837300009726
https://doi.org/10.1017/s0094837300009726