Ograniczanie wyników

Czasopisma help
Autorzy help
Lata help
Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 54

Liczba wyników na stronie
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 3 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych:  Belgium
help Sortuj według:

help Ogranicz wyniki do:
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 3 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
Innovativeness is perceived as one of the most important driving forces of economic condition. The issue concerns both individual economic entities as well as whole economies. Innovativeness, in fact, brings various positive results. Innovative activity provides possibility to introduce new, innovative products or services on the market, use of more effective and frugal production methods, etc. Consequently, it provides the chance for business development, introduction on new markets or increased participation in the present ones. It may often result in an increased production or possibility to create new work places. With regard to economic situation it may result in an increase of GDP or a decrease of unemployment rate, which profoundly influences economic situation. [Prystrom, 2013, p. 82] The aim of the hereby study is to introduce the core of innovations and present chosen factors determining innovativeness in constructing competitive advantage, on the basis of Belgian economy, considered to be one of the most innovative and competitive in the world.
Between 1994 and 1999, 219 red foxes (Vulpes vulpes) were collected in northern Belgium and examined for intestinal helminths. The effects of host-related (age, sex, body mass/size ratio) and temporal factors on the prevalence and on the number of parasite species per individual host were investigated. The following parasites were found: cestodes Echinococcus multilocularis (1.8%), Dipylidium caninum (0.9%) and Taenia spp. (2.7%), nematodes Toxocara canis, Toxascaris leonina (47.9%) and Uncinaria stenocephala (31.5%), and trematode species (0.9%). Of all foxes, 82 (37.4%) proved to be fully negative. We found no host-related (sex, age) nor temporal effect on parasite occurrence and on the number of parasite species per individual host. Unparasitised adult foxes had a higher body mass/size ratio than hosts with intestinal parasites and also the number of parasite species per individual was negatively related with this rough index of host body condition. The presence of these zoonotic parasites in a region with a very high human population density urges a close surveillance of these parasites as they may lead to expansions of helminthoses in (northern) Belgium. Finally, this study emphasizes the need to study the prevalence of intestinal helminths in regions that are recently colonised by red foxes since such studies may add to our understanding of the emergence, the temporal spread and the persistence of zoonoses in Europe.
Although modern porpoises (Phocoenidae, Odontoceti, Cetacea) occupy most oceanic regions of the world, their fossil record outside the Pacific Ocean remains extremely scarce. Based on a partial skull from lower Pliocene layers (Kattendijk Formation, Zanclean, 5–4.4 Ma) of the Antwerp harbour, a new genus and species of fossil phocoenid, Brabocetus gigaseorum gen. et sp. nov., is described. The new taxon is diagnosed by a unique combination of characters including an anterolateraly widely-open antorbital notch, the anteromedial sulcus being shorter than the posteromedial sulcus, the frontal boss being longer than wide, pronounced asymmetry of the vertex, and the possible presence of an additional longitudinal sulcus across the premaxillary eminence. The phylogenetic analysis indicates that B. gigaseorum is not closely related to extant phocoenids; it is included in a clade comprising most north-west Pacific fossil species, two north-east Pacific fossil species, and the only previously described North Sea fossil species Septemtriocetus bosselaersi. Considering the paleobiogeographic distribution of phocoenids, an early Pliocene arrival from the North Pacific to the North Sea may be correlated to the early opening of the Bering Strait and migration via the Arctic. The presence of S. bosselaersi in younger deposits (Piacenzian) of the southern margin of the North Sea Basin could be the result of either a second dispersal event, or of local speciation in the North Sea, whereas an additional trans-Arctic migration from the North Pacific lead to the present occupation of the North Atlantic and North Sea by the phylogenetically distantly related harbor porpoise Phocoena phocoena.
Almost six years after the first finding of the round goby Neogobius melanostomus (Gobiidae) in the Netherlands, several specimens of this invasive Ponto-Caspian benthic fish were also recorded in the Belgian part of the River Scheldt and in the Albert Canal. This is the first record of the round goby in Belgium.
Adapisoriculidae are an enigmatic group of small mammals known from the late Cretaceous of India, and from the early Palaeocene to early Eocene of Europe and Africa. Based on their primitive dental morphology, they have been classified as didelphids, nyctitheriids, leptictids, mixodectids, tupaiids, and palaeoryctids. While the latest hypothesis based on dental morphology suggests an affinity with Lipotyphla, postcranial remains indicate a close relationship with Euarchonta. Here, we present new adapisoriculid dental remains from the early Palaeocene locality of Hainin (Belgium). Adapisoriculidae are particularly abundant in Hainin, where they represent about one third of the mammalian fauna, offering new insights into both their specific and generic phylogenetic interrelationships. We describe three new species (Afrodon gheerbranti sp. nov., Bustylus folieae sp. nov. and Proremiculus lagnauxi gen. et sp. nov.) and document the previously unknown lower dentition of Bustylus marandati. The diversity of dental morphologies observed in the Hainin fauna suggests different interrelationships than previously suggested. In particular, the genus Proremiculus is considered morphologically intermediate between Afrodon and Remiculus, and the latter is no longer recognised as the sister group of Adapisoriculus. Although the highest diversity of adapisoriculids occurs in Europe, the oldest and most primitive members of the family were found in India and Africa, respectively. The geographic origin of the family could thus be located in any of these three continents, depending on the importance attributed to each of these factors. The coexistence of primitive and derived adapisoriculids at Hainin might indicate a very quick diversification in Europe, probably starting around the K−T boundary.
The issue of Polish - Belgian agricultural trade during the interwar period while in Poland existed market economy can serve an useful perspective for better understanding of actual transformations. In the first part of the article some economic conditions of the Polish foreign trade are briefed. The second part deals with agricultural trade between the two countries of concern. The strenghtening of Belgian position as a trade partner for Poland during 30s is pointed out. The clear trend to receive trade surplusses by Poland is depicted. The siguificance of Polish food export to Belgium is stressed, in particular of barley and horses.
During the Devonian the sedimentation on the continental shelves of Ardenne Massif and Boulonnais has changed from a mixed siliciclastic-carbonate ramp (Eifelian), through a carbonate barrier reef (Givetian) and then to a detritic influx with local mud-mounds (Frasnian). Here we analysed the faunistic dynamics of the trilobite associations through the changing environment. We used multivariate analyses (clustering and ordering) to discriminate the trilobite associations within 67 different samples. Three previously known communities and one new were recognised: the Eifelian Mixed association, the Givetian Dechenella association and the two Frasnian Bradocryphaeus and Scutellum-Goldius associations. These trilobite faunas present a progressive ecological specialisation. The Mixed association occurs both in the ramp or carbonated (local reef developed on the ramp) facies without any significant difference in its composition. The Dechenella fauna occurs preferentially close to barrier reefs, but can also survive during short periods of detrital input. The two Frasnian communities show a strong relationship with their environment. The Scutellum-Goldius association is only found in reef systems, whereas the Bradocryphaeus flourishes exclusively in lateral facies.
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 3 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.