Autor: Urbanek, E. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Changes in soil organic matter, bulk density and tensile strength of aggregates after percolation in soils after conservation and conventional tillage
Autorzy:: Urbanek, E.
Horn, R.
Powiązania:: https://bibliotekanauki.pl/articles/25884.pdf
Data publikacji:: 2006
Wydawca:: Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:: organic matter
carbon distribution
aggregate strength
bulk density
tillage
tensile strength
arable soil
conventional tillage
soil
percolation process
soil aggregate
soil conservation
aggregate
Źródło:: International Agrophysics; 2006, 20, 3
0236-8722
Pojawia się w:: International Agrophysics
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 2.

Tytuł:: Effect of long storage and soil type on the actual denitrification and denitrification capacity to N2O formation
Autorzy:: Wlodarczyk, T.
Szarlip, P.
Koziel, W.
Nosalewicz, M.
Brzezinska, M.
Pazur, M.
Urbanek, E.
Powiązania:: https://bibliotekanauki.pl/articles/24513.pdf
Data publikacji:: 2014
Wydawca:: Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:: long storage
soil type
soil respiration
denitrification
denitrification capacity
nitrous oxide
formation
nitrate
Opis:: The actual denitrification to N 2 O and denitri- fication capacity to N 2 O after flooding of different soil samples stored for over 25 years in air-dry conditions and fresh, air dried samples were compared in our study. Zero N 2 O release was ob- served from the stored soils but the fresh soil samples had very low actual denitrification to N 2 O. NO 3 - addition significantly increased the amount of N 2 O (denitrification capacity to N 2 O) released after flooding, which depended on the length of storage and type of soils and was much higher in stored soils. Prolonged exposure of the soils to drought conditions caused a greater decrease in the Eh value compared with the fresh soil. The total cumulative release of N 2 O from the stored and fresh soils was correlated with the reduced NO 3 - and organic C content in soils enriched with NO 3 - . Some soils showed the capability of N 2 O consumption. CO 2 release depended on the length of storage and type of soils under flooding after pro- longed drought. On average, CO 2 release was higher from the stored rather than fresh soils. The organic C content in the stored soils was generally lower than in the fresh soils, probably due to the storage effect. The cumulative CO 2 release from the stored soils was well correlated with the organic C while no correlation was observed for the fresh soil samples.
Źródło:: International Agrophysics; 2014, 28, 3
0236-8722
Pojawia się w:: International Agrophysics
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 3.

Tytuł:: The ultrastructure, development, and systematic position of the graptolite genus Mastigograptus
Autorzy:: Bates, D E B
Urbanek, A.
Powiązania:: https://bibliotekanauki.pl/articles/21265.pdf
Data publikacji:: 2002
Wydawca:: Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:: Graptolithina
internal structure
graptolite
development
remains
Pterobranchia
taxonomy
systematic position
stratigraphy
Mastigograptus
Ordovician
ultrastructure
paleontology
Opis:: Fragments of rhabdosomes isolated by chemical treatment from an erratic boulder of Baltic origin and ?Middle Ordovician age, provisionally assigned to Mastigograptus aff. tenuiramosus (Wallcott, 1881) were studied with SEM. Although exceptionally well preserved, remains lack the thin−walled free portions of thecae. Rhabdosomes are provided with a strongly developed basal disc, short stem and many branched stipes. The latter consist of heavily corticalized chains of stolothecae with alternately disposed thecal bases. Stolothecae display a morphological gradient and increase in size and change in shape distalwards. The stolon system studied with SEM on naturally and artificially broken specimens, as well as traced through open thecal bases, reveals a regular triad budding but no stolon inside the stolothecal cavity. We tentatively suggest that crassal lining, recognized earlier by TEM studies, corresponds to an unusually inflated stolonal stolon, filling the entire thecal cavity and adhering tightly to stolothecal wall. The systematic position of Mastigograptus, a matter of long debate, seems to be defined by a number of structural features which imply a distinct difference between genus in question and all known orders of sessile graptolites. The order Mastigograptida nov. and the family Mastigograptidae nov. are proposed.
Źródło:: Acta Palaeontologica Polonica; 2002, 47, 3
0567-7920
Pojawia się w:: Acta Palaeontologica Polonica
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Informacja

Wyszukujesz frazę "Urbanek, E." wg kryterium: Autor

Źródło danych

Dostawca treści

Kolekcja

Rok wydania

Wydawca

Temat

Autor

Typ dokumentu

Język