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Wyświetlanie 1-25 z 453
Tytuł:
Notes on species of Lecanora (lichenized Ascomycotina) from the Antarctic
Autorzy:
Śliwa, Lucyna
Olech, Maria
Powiązania:
https://bibliotekanauki.pl/articles/2052119.pdf
Data publikacji:
2002
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Antarctic
Lecanora
taxonomy
distribution
Źródło:
Polish Polar Research; 2002, 23, 2; 117-133
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cluster Analysis – Symbolic vs. Classical Data
Analiza skupień – dane symboliczne a dane klasyczne
Autorzy:
Wilk, Justyna
Pełka, Marcin
Powiązania:
https://bibliotekanauki.pl/articles/904587.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
cluster analysis
symbolic data analysis
classification
numerical taxonomy
symbolic taxonomy
Opis:
Clustering problem is addressed in many contexts and disciplines. Although there are numerous studies on cluster analysis, there is a lack of a review to complete and systematize knowledge of research approach depending on data form. The paper presents a concept of clustering, classifications of cluster analysis methods, comparison of numerical and symbolic taxonomy, specificity of symbolic data as regards classical data, methods of numerical and symbolic data analysis applicable in clustering procedure.
Celem artykułu jest usystematyzowanie wiedzy na temat analizy skupień w zależności od rodzaju danych empirycznych opisujących problem badawczy. W artykule zaprezentowano cele analizy skupień, dokonano klasyfikacji metod analizy skupień, porównano metody taksonomii numerycznej i symbolicznej. Omówiono także specyfikę danych symbolicznych w odniesieniu do danych w ujęciu klasycznym oraz ich źródła w badaniach ekonomicznych. Wskazano metody statystyczne, jakie mają zastosowanie w analizie danych klasycznych i symbolicznych na każdym etapie procedury klasyfikacji.
Źródło:
Acta Universitatis Lodziensis. Folia Oeconomica; 2013, 286
0208-6018
2353-7663
Pojawia się w:
Acta Universitatis Lodziensis. Folia Oeconomica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new subspecies of Bulbophyllum (Orchidaceae, Bulbophyllinae) from The Society Islands
Autorzy:
Margonska, H.B.
Powiązania:
https://bibliotekanauki.pl/articles/58533.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
new subspecies
Bulbophyllum tahitense
Orchidaceae
Bulbophyllinae
Society Islands
taxonomy
plant taxonomy
French Polynesia
Opis:
A new subspecies of the Bulbophyllum tahitense (Orchidaceae), from The Society Islands (French Polynesia) is proposed. A new subspecies is described and illustrated. Keys to taxa of Society Islands genus Bulbophyllum, is added.
Źródło:
Acta Societatis Botanicorum Poloniae; 2012, 81, 1
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rozvoj psychomotorickej zložky asobnosti žiaka vo vyučovani technických predmetov prostredníctvem taxonómie pimkat
Autorzy:
Bajtoš, Ján
Powiązania:
https://bibliotekanauki.pl/articles/2140987.pdf
Data publikacji:
2011
Wydawca:
Instytut Studiów Międzynarodowych i Edukacji Humanum
Tematy:
psychomotorics skills
valuation of psychomotorics skills
technical education
taxonomy
taxonomy psychomotorics aims PIMKAT
Opis:
The functions objects bearing for the development of psychomotor crafts is teaching children and young people feel tasks and problems in association with high industrialized society, create their relationship to technic how part professional education. Contribution oneself dealt formation psychomotor crafts pupil from the view modern access in pedagogic at the same time introduce planning taxonomy PIMKAT. Research confirmed substantiality proposition taxonomy psychomotor aim PIMKAT and its efficiency in school praxis.
Źródło:
Humanum. Międzynarodowe Studia Społeczno-Humanistyczne; 2011, 2(7); 95-105
1898-8431
Pojawia się w:
Humanum. Międzynarodowe Studia Społeczno-Humanistyczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electrophoretic seed globulin patterns and species relationships in Vicia section Faba [Fabaceae]
Autorzy:
Zimniak-Przybylska, Z
Przybylska, J.
Powiązania:
https://bibliotekanauki.pl/articles/2047727.pdf
Data publikacji:
1995
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Vicia faba
globulin
elektrophoresis
taxonomy
Opis:
This work presents electrophoretic seed globulin data obtained for 173 accessions representing nine Vicia species of the section Faba, which were already investigated for electrophoretic seed albumin patterns (PRZYBYLSKA, ZIMNIAK-PRZYBYLSKA, in press). Electrophoretic analysis of seed globulins was performed using sodium dodecyl sulphate - polyacrylamide gel electrophoresis (SDS-PAGE). In the examined material totally 38 well-defined polypeptide bands, in the relative molecular mass range of 19-61 kDa, were distinguished. The presence/absence of particular bands was recorded for each analysed individual. The electrophoretic data were used for hierarchical grouping of the examined taxa, based on calculated Bhattacharyya distances. V. bithynica proved to be the most distinctive member of Vicia section Faba. In turn, V. faba was clearly different from species of the V. narbonensis complex. Taxa of this complex formed two clusters: one consisting of V. narbonensis varieties and another - of the remaining species. In the latter group, V. serratifolia appeared to be rather distantly related to V. eristalioides, V. galilaea, V. hyaeniscyamus, V. Johannis and V. kalakhensis. The obtained results are compared with the corresponding seed albumin data and discussed with reference to taxonomie relationships in Vicia section Faba.
Źródło:
Journal of Applied Genetics; 1995, 36, 4; 299-312
1234-1983
Pojawia się w:
Journal of Applied Genetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The hepatics of King George Island, South Shetland Islands, Antarctica, with particular reference to the Admiralty Bay region
Autorzy:
Ochyra, Ryszard
Váňa, Jiři
Powiązania:
https://bibliotekanauki.pl/articles/2053143.pdf
Data publikacji:
1989
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Antarctica
bryology
Hepaticae
taxonomy
distribution
Źródło:
Polish Polar Research; 1989, 10, 2; 183-210
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Przegląd systematyki rodzaju Populus L.
A review of systematics of Populus L.
Autorzy:
Korbik, Mateusz
Powiązania:
https://bibliotekanauki.pl/articles/1196159.pdf
Data publikacji:
2021-04-27
Wydawca:
Polskie Towarzystwo Dendrologiczne
Tematy:
poplar
cottonwood
aspen
taxonomy
Opis:
Populus is a genus that contains numerous taxa that are often difficult to identify. They are grouped into six sections which are mainly based on the differences in the structure of flowers and leaves. Nevertheless, other features are also of great importance in identifying individual sections. In this paper, individual sections are characterized. Two subsections within the Populus section (syn. Leuce Duby) are distinguished, due to the clear differences between white poplars and aspens. The sections are as follows: sect. 1. Abaso Eckenw. (mexican poplar), sect. 2. Turanga Bunge (arid and tropical poplars), sect. 3. Leucoides Spach (bigleaf poplars), sect. 4. Aigeiros Duby (cottonwoods and black poplar), sect. 5. Tacamahaca Spach (balsam poplars), sect. 6. Populus, with two subsections: 6a. Populus (white poplars) and 6b. Trepidae (Dode) Tamm (aspens).
Źródło:
Rocznik Polskiego Towarzystwa Dendrologicznego; 2020, 68; 77-90
2080-4164
2300-8326
Pojawia się w:
Rocznik Polskiego Towarzystwa Dendrologicznego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
RAPD markers and black pine [Pinus nigra Arnold] intraspecies taxonomy - evidence from the study of nine populations
Autorzy:
Liber, Z
Nikolic, T.
Mitic, B.
Satovic, Z.
Powiązania:
https://bibliotekanauki.pl/articles/59270.pdf
Data publikacji:
2003
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
classification
Mediterranean Basin
botany
taxonomy
distribution
black pine
population
intraspecies taxonomy
Pinus nigra
Opis:
Although intraspecies researches within the black pine (Pinus nigra Arnold) have a long tradition, the intraspecies taxonomy, classification and chorology are still unclear. Among the numerous reasons that have caused this situation the most important are: the absence of a study that would completely cover the whole range of this species, the impossibility of connection of results of the existing detailed studies of certain areas, and the high variability of traits which have been used so far. Since the characteristics of the molecular systematic techniques could make possible the research free of the mentioned shortages, the intention of this study was to determine the relationships among nine populations of black pine using the random amplified polymorphic DNA (RAPD). The obtained results were compared to the recent results of the morphological and anatomical analysis of the leaves of the same populations. The RAPD results clearly divided the Croatian populations from populations of Austria (subsp. nigra) and Turkey (subsp. pallasiana), while among Croatian populations, as in previous study, the existence of several groups (subsp. illyrica, subsp. dalmatica and transitional population between them) was noticed. It is assumed that the optimisations conducted in this study will finally make possible estimating the relationships on the level of the whole range of the black pine and the classification based on molecular traits that are probably less dependent on environmental influences than it has been the case with the characteristics mostly used so far.
Źródło:
Acta Societatis Botanicorum Poloniae; 2003, 72, 3
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
BRINGING THE KNOWLEDGE COMPONENTS OF PHYSICAL ACTIVITY EDUCATION (INCLUDING SPORT) TO THE PRACTICING PHYSICAL ACTIVITY EDUCATOR
Autorzy:
Zeigler, Earle F.
Powiązania:
https://bibliotekanauki.pl/articles/449208.pdf
Data publikacji:
2013
Wydawca:
Politechnika Opolska. Wydział Wychowania Fizycznego i Fizjoterapii
Tematy:
field
discipline
profession
principle
taxonomy
generalization
Opis:
The field of physical (activity) and health education, or whatever it is called in any one of the world’s countries, has undergone a “determined” but often “confused” development in the 20th century. After Sputnik went up in 1957, the field sought help from a variety of disciplines (e.g., kinesiology) and professions (e.g., management) in an attempt to truly define itself. Building on what Arthur Steinhaus (George Williams College) stated were its four “principal principles” in the early 1950s, the author asserts that some 14 “principal principles” of the field can now be affirmed. Searching for consensus, a proposed taxonomy for “developmental physical activity in exercise, sport, and physical recreation” is offered here for consideration as the field moves along in the 21st century. The author argues that the field also needs to make available to the professional practitioner a computerized inventory of generalizations that represents a distillation of the field’s scientific and scholarly literature.
Źródło:
Journal of Physical Education & Health - Social Perspective; 2013, 2, 4; 5-18
2084-7971
Pojawia się w:
Journal of Physical Education & Health - Social Perspective
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Re-discovery of Lieberkuehnia wageneri Claparède et Lachmann, 1859 (Rhizaria, Foraminifera): Taxonomical and Morphological Studies Based on a Slovak Population
Autorzy:
MRVA, Martin
Powiązania:
https://bibliotekanauki.pl/articles/763670.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Tematy:
Alpha taxonomy, Foraminifera, nomenclature, moss, amoebae
Opis:
Lieberkuehnia wageneri Claparède et Lachmann, 1859, a poorly known freshwater foraminiferan, was re-discovered after 38 years in a moss sample from an oak-hornbeam forest in Malé Karpaty Mts. (Western Slovakia). The species was taxonomically revised, re-described using light microscopical observations, and its occurrence and ecology were reviewed. Its locomotive form is typical with membranous and flexible ovoid test having a single terminal aperture from which a broad pseudopodial network emerges on a pseudopodial peduncle. Additional data and details are described, illustrated and discussed. Lieberkuehnia wageneri is known from various freshwater, soil and marine habitats in Western and Middle Europe, suggesting a high ecological tolerance and wide distribution. It is hoped that the observations reported in this paper will aid the identification of this species based on the locomotive morphology at the light microscopical level.
Źródło:
Acta Protozoologica; 2009, 48, 2
1689-0027
Pojawia się w:
Acta Protozoologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thecamoeba aesculea n. sp. (Amoebozoa, Thecamoebidae), a Terrestrial Amoeba with Affinities to Th. sphaeronucleolus (Greeff, 1891)
Autorzy:
KUDRYAVTSEV, Alexander
HAUSMANN, Klaus
Powiązania:
https://bibliotekanauki.pl/articles/763696.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Tematy:
Amoebae, morphology, morphospecies, taxonomy, Thecamoeba, ultras
Opis:
Thecamoeba aesculea n. sp. was isolated and described from the surface of the bark of Aesculus hippocastanum and from terrestrial mosses growing on it. This amoeba is superficially similar to Thecamoeba sphaeronucleolus, but comparison of the newly isolated strain with the photographs and video records of the type strain of this species reveals differences which show that the two strains do not belong to the same morphospecies. The data obtained indicate the necessity of further comparative studies on the diversity of thecamoebian ‘morphospecies’ to outline clearer borders between them.
Źródło:
Acta Protozoologica; 2009, 48, 2
1689-0027
Pojawia się w:
Acta Protozoologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Redescription of Strombidium coronatum (Leegaard, 1915) Kahl, 1932 (Ciliophora, Spirotricha) based on live observation, protargol impregnation, and scanning electron microscopy
Autorzy:
Agatha, Sabine
Powiązania:
https://bibliotekanauki.pl/articles/763730.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Tematy:
Marine waters, morphology, Oligotrichida, stomatogenesis, taxonomy
Opis:
The oligotrichid ciliate Strombidium coronatum (Leegaard, 1915) Kahl, 1932 is redescribed from plankton samples taken in the Irish Sea, using live observation, protargol impregnation, and scanning electron microscopy. The species is characterized by a conspicuous, uniquelly shaped peristome, which is flat and roughly triangular and extends in the sagittal plane. The Irish Sea specimens measure ~ 45 × 25 µm in vivo and ~ 40 × 24 µm after protargol impregnation. The girdle kinety is equatorial, ostensibly continuous, and composed of ~ 100 dikinetids. The ventral kinety extends longitudinally on the posterior fifth of the cell and is composed of about five dikinetids. The adoral zone of membranelles is widely open and composed of ~ 18 collar and ~ 12 buccal membranelles; the collar portion is disconnected from the buccal portion. The shape and orientation of the opisthe’s adoral zone of membranelles are apparently extraordinary, i.e., the membranelles form an inverted L-shaped stripe extending longitudinally in the elongated posterior cell portion of dividers.
Źródło:
Acta Protozoologica; 2014, 53, 4
1689-0027
Pojawia się w:
Acta Protozoologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Scale Structure of Cochliopodium actinophorum (Auerbach, 1856) (Amoebozoa, Cochliopodiidae) and a New Diagnosis of this Species
Autorzy:
Kudryavtsev, Alexander
Powiązania:
https://bibliotekanauki.pl/articles/763732.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Tematy:
Amoebozoa, Cochliopodium, morphology, scales, taxonomy, ultrastructure
Opis:
Cochliopodium actinophorum (Auerbach, 1856) is one of the oldest and most frequently mentioned species of the genus, yet the structure of scales comprising tectum of these amoebae has never been described, and the strain previously used to re-define this species based on light microscopic characters was lost. A new strain identified as C. actinophorum using light microscopy was isolated recently, and molecular sequence data of this strain were published, yet without any morphological data. Here, the results of light and electron microscopic study of this strain are presented that confirm its identification as C. actinophorum and allow a proposal of a new diagnosis of this species thus linking morphology, scale ultrastructure and available gene sequence data. The newly isolated strain deposited with CCAP (accession number 1537/10) is designated as a neotype.
Źródło:
Acta Protozoologica; 2014, 53, 4
1689-0027
Pojawia się w:
Acta Protozoologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Earliest Triassic (Induan) megaspores from Moscow Syneclise, Russia : taxonomy and stratigraphy
Autorzy:
Karasev, E.
Turnau, E.
Powiązania:
https://bibliotekanauki.pl/articles/191706.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
megaspores
taxonomy
palynostratigraphy
Triassic
Induan
Russia
Opis:
This study describes the megaspore assemblages from the Ryabinsk Member of the Vokhma Formation of the Moscow Syneclise. The genus Otynisporites is emended, three new species, Maexisporites meditectatus, M. rugulaeferus and Otynisporites maculosus, are erected, and one new combination, Maexisporites grosstriletus, is proposed. Megaspore descriptions relate the gross morphology and fine structure of the exine surface of thirteen taxa. From the appearance of the exine surface and ornamentation processes, it appears that some forms currently included in certain genera according to their morphological features do not belong to them. The assemblage from Sholga is evidently of low diversity at the generic level, possibly reflecting the end-Permian biotic crisis. The composition of the megaspore assemblages indicates their Induan age.megaspores taxonomy palynostratigraphy Triassic Induan Russia
Źródło:
Annales Societatis Geologorum Poloniae; 2015, 85, 1; 271-284
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mesozoic gastropods from Siberia and Timan ( Russia ). Part 1: Vetigastropoda and Caenogastropoda (exclusive of Neogastropoda)
Autorzy:
Kaim, Andrzej
Beisel, Alexander L.
Kurushin, Nikolai I.
Powiązania:
https://bibliotekanauki.pl/articles/2052047.pdf
Data publikacji:
2004
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Siberia
Timan
Mesozoic
paleontology (gastropods)
taxonomy
Źródło:
Polish Polar Research; 2004, 25, 3-4; 241-266
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The discovery of the South Georgian endemic species Schistidium urnulaceum (C. Muell.) B. G. Bell (Musci: Grimmiaceae) in the Antarctic
Autorzy:
Ochyra, Ryszard
Powiązania:
https://bibliotekanauki.pl/articles/2052903.pdf
Data publikacji:
1990
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
South Georgia
Antarctica
bryology
taxonomy
Schistidium
Źródło:
Polish Polar Research; 1990, 11, 1-2; 133-146
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
First record of the bivalve species Parvamussium fenestratum (Forbes, 1844) from the Middle Miocene of the Paratethys
Autorzy:
Studencka, B.
Prysyazhnyuk, V. A.
Ljul’eva, S. A.
Powiązania:
https://bibliotekanauki.pl/articles/2059411.pdf
Data publikacji:
2012
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Bivalvia
Pectinoidea
taxonomy
palaeobiogeography
Badenian
Paratethys
Opis:
This is the first Paratethyan record of a minute scallop species Parvamussium fenestratum (Forbes, 1844). The species was found in Middle Miocene (Upper Badenian) clayey deposits in the Surzha borehole, the Ukrainian Carpathian Foredeep Basin. Examination of other Parvamussium specimens stored in the Museum of the Earth in Warsaw and in the Hungarian Natural History Museum in Budapest revealed further Paratethyan records of Parvamussium fenestratum. These specimens, previously referred to Parvamussium felsineum (Foresti, 1893), were identified in the Middle Miocene faunas of Poland (Monastyrz and Długi Goraj, Roztocze Hills) and Hungary (Makkoshotyka, Tokaj Mts.). In the Mediterranean Neogene this extremely rare species has been reported from the Lower Miocene (uppermost Burdigalian) of Italy and from the Lower Pliocene (Zanclean) of Spain. Research on the Oligocene-Miocene succession in the Paratethys has shown representatives of Parvamussium Sacco, 1897 to be moderately abundant in clayey facies in different basins and the genus is regarded as biostratigraphically important. Data on the distribution of other Paratethyan and Neogene Mediterranean Parvamussium species viz., Parvamussium bronni (Mayer, 1861), P. duodecimlamellatum (Bronn, 1831), P. felsineum (Foresti, 1893) and P. miopliocenicum (Ruggieri, 1949) are reported. Finally, palaeobiological and palaeobiogeographical characteristics on the genus Parvamussium Sacco, 1897 the Early Cretaceous to Recent time span are described.
Źródło:
Geological Quarterly; 2012, 56, 3; 513--528
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The history of bears (Ursidae, Carnivora, Mammalia) from Silesia (southern Poland) and the neighbouring areas
Autorzy:
Marciszak, Adrian Przemysław
Lipecki, Grzegorz
Powiązania:
https://bibliotekanauki.pl/articles/2060135.pdf
Data publikacji:
2020
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
taxonomy
Miocene
Pliocene
Pleistocene
ursid lineages
Opis:
Revision of the Silesian bear fauna, based on material from 152 sites, mainly cave and karstic localities, and also archaeological and open-air sites, shows the presence of 13 forms and species. These records encompass the last 16.5 Ma and may be divided into five main morphophyletic groups. The oldest bears, represented by the genera Ballusia and Ursavus, are dated to 16.5-11 Ma, and belonged to the stem forms of the subfamily Ursinae. After a break of 6 My, the earliest members of the genus Ursus appeared, and all known Pliocene bears in Silesia belong to the genus Ursus were identified as Ursus minimus. They represent one or two migration events. Additionally, between 3.6 and 3.2 Ma, a single occurence of Agriotherium insigne was recorded from the Węże 1 site. A few Early Pleistocene bear records are represented by U. etruscus, which was a probable ancestor of both arctoid and spelaeoid bear lineages. The oldest representative of Ursus ex gr. arctos known so far and assigned to U. a. suessenbornensis is known from one latest Early Pleistocene (1.2-0.9 Ma) locality, while other Polish records of this form require confirmation. The first occurrence of U. deningeri, the oldest taxon within the U. ex gr. deningeri-spelaeus lineage, was recorded from ~700 ka deposits in Silesia. During the pronounced cold period of MIS 12, the Scandinavian ice sheet covered almost the entire modern territory of Poland, with the exception of the Sudetes and the Carpathians. The accompanying drastic faunal turnover led to the formation of the pan-Eurasian Mammoth Fauna at ~460 ka. At that time a characteristic member of this fauna, the steppe brown bear Ursus arctos priscus, a specific ecomorph adapted to live in open grasslands, appeared in this region. It survived until the beginning of MIS 1, when modern Ursus arctos arctos appeared in Silesia and survived to the present day. U. deningeri was the most common bear during the Middle Pleistocene, while the first records of U. spelaeus spelaeus appeared since MIS 7. The latter form was replaced by U. ingressus during the Late Pleistocene (~110-100 ka). Spelaeoid bears totally dominated the cave assemblage, and finally vanished between 27 and 24 ka.
Źródło:
Geological Quarterly; 2020, 64, 4; 876-897
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of social and economic conditions of microenterprises based on taxonomy methods
Autorzy:
Ptak-Chmielewska, Aneta
Chłoń-Domińczak, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/19908216.pdf
Data publikacji:
2023-09-08
Wydawca:
Główny Urząd Statystyczny
Tematy:
microenterprises
taxonomy methods
COVID-19
Opis:
The situation of microenterprises on the market is difficult as they are faced with barriers and competitiveness imposed by larger units. We used data from the REGIOGMINA project to assess the situation of microenterprises. The REGIOGMINA project was implemented by a consortium of Kujawsko–Pomorskie Voivodship, the SGH Warsaw School of Economics and the Nicolaus Copernicus University in Toruń in the scope of the GOSPOSTRATEG initiative. This data set was complemented by data provided by the Local Data Bank of Statistics Poland. The analysis describes the situation in Kujawsko-Pomorskie Voivodship. The information from both sources illustrates the situation of microenterprises at a local level (gmina) in the years 2019–2020. A cluster analysis based on taxonomy methods was performed. The aim of the research is to expand the knowledge and contribute to a better understanding of the social and economic problems that microenterprises are confronted with at a local level. The study covers the period before the COVID-19 pandemic and the first year following its outbreak, which makes it possible to assess the effects that the measures taken against the pandemic had on the situation of microenterprises at a local level.
Źródło:
Statistics in Transition new series; 2023, 24, 4; 139-151
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pollen morphology of some species of the genus Sansevieria petagna (Asparagaceae)
Autorzy:
Klimko, Małgorzata
Nowińska, Renata
Wilkin, Paul
Wiland-Szymańska, Justyna
Powiązania:
https://bibliotekanauki.pl/articles/952105.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
pollen variability
micromorphology
taxonomy
sem
Opis:
Pollen grains of 15 species of the genus Sansevieria were examined using light and scanning electron microscopy. The pollen grains were single, but dyads were also found. The basic shape of the pollen grains (with chemical treatment) was subprolate, prolate and prolate-spheroidal and the pollen grains were large (> 50 mm). The pollen grains observed in SEM were prolate-spheroidal, subprolate, prolate and perprolate. The aperture occupied nearly the entire distal hemisphere. The surface of non-apertural areas was microreticulate, psilate–perforate, fossulate and verrucate. The surface of the apertural area was psilate-perforate-verrucate, microreticulate-verrucategemmate and psilate-perforate. The tectum was homogeneous, with perforations. Our results suggest that some species cannot be separated based on pollen grain morphology, but only may be categorized into their groups. The present study investigated pollen grain morphology in eleven species for the first time in terms of pollen micromorphology and provided some important new data.
Źródło:
Acta Biologica Cracoviensia. Series Botanica; 2017, 59, 2
0001-5296
Pojawia się w:
Acta Biologica Cracoviensia. Series Botanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Designing Diving Technology. Part I, Decompression Requirements
Autorzy:
Kłos, Ryszard
Powiązania:
https://bibliotekanauki.pl/articles/32876894.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Medycyny i Techniki Hiperbarycznej
Tematy:
underwater work technology
decompression
taxonomy
Opis:
This article is a further one in an unintended series concerning the design of diving technology [1,2,3]. It contains answers to questions raised by readers upon reading previous articles and by users of the systems described therein by way of example. The articles also refer to the discussion held at the annual NATO Working Group meeting on the various types of decompression presented by the Polish side [4,5,6,7]. The previous articles were linked to the acceptance of the results of the project No. DOB-BIO8/О9/О1/2016 carried out under the contract with the NCBiR National Centre for Research and Development entitled “Decompression schedules for MCM/EOD II diving” carried out in 2016-2021. The current article is linked to the new project No. DOB-BIO-12-03-001-2022 implemented under the contract with the NCBiR entitled: “The effects of combat effort and air transport on the safety of combat divers in the execution of underwater combat operations,” scheduled for 2023-2025.
Źródło:
Polish Hyperbaric Research; 2022, 4(81); 7-52
1734-7009
2084-0535
Pojawia się w:
Polish Hyperbaric Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Achene morphology and pericarp anatomy of Anemone, Hepatica, and Pulsatilla (Anemoninae, Ranunculaceae)
Autorzy:
Ghimire, B.
Yum, D.
Kim, J.H.
Jeong, M.J.
Powiązania:
https://bibliotekanauki.pl/articles/2117680.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
achene
Anemoninae
pericarp
Ranunculaceae
taxonomy
Opis:
The achene morphology and pericarp anatomy of 12 taxa representing three genera (Anemone, Hepatica, and Pulsatilla) of the subtribe Anemoninae were investigated using microtome and light microscopy to evaluate the taxonomic implications of achene characters. The achenes of Anemone were elliptical or obovoid and beaked, whereas the achene of Hepatica and Pulsatilla were obovoid and elliptical, respectively. Noticeable variations in both quantitative and qualitative features of achenes were observed among the species of the three genera. One-way analysis of variance indicated that the quantitative achene variables among the species were highly significant (P<0.001). Pearson’s correlation coefficient also showed a significant correlation between different achene variables. The pericarp structure, particularly the number of cell layers and cell forms in the exocarp and endocarp, seems to be very useful for species delimitation in Anemone and Hepatica. The nature of the endotesta could provide substantial proof for sub-generic classification in Anemone. Unweighted paired group analysis showed the utility of achene features for taxonomic groupings of the species within the studied genera. Although the specimen samples represented a limited range of taxa, the achene features and pericarp anatomy provided a reasonable source for the taxonomic treatment of the studied genera within the subtribe.
Źródło:
Acta Biologica Cracoviensia. Series Botanica; 2021, 63, 1; 7-19
0001-5296
Pojawia się w:
Acta Biologica Cracoviensia. Series Botanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-25 z 453

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