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Wyszukujesz frazę "Kamenov, Y." wg kryterium: Autor


Wyświetlanie 1-3 z 3
Tytuł:
Echinococcosis and hydatidosis in Bulgaria
Autorzy:
Kamenov, Y
Atanassov, A.
Prelesov, P.
Kalinova, K.
Rasheva, G.
Powiązania:
https://bibliotekanauki.pl/articles/840016.pdf
Data publikacji:
1998
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
Echinococcus granulosus
parasite
disease
infection
epizootiology
veterinary medicine
hydatidosis
dog
echinococcosis
epidemiology
larva
Bulgaria
Opis:
As far as echinococcosis and hydatidosis are concerned the situation in Bulgaria during the last 45 years has been different from the situation in other countries having permanent problems with these helminthoses. Till 1951 echinococcosis in dogs in Bulgaria was not controlled. After this period planned prophylactic treatment of sheep-dogs and hunting dogs started and control over the slaughter houses began. As a result of the long-term programme for complex struggle against these diseases significant success was achieved in Bulgaria during the 70s. and 80s. After 1985 the system of long-term struggle with echinococcosis stopped functioning. Rapid and uncontrollable development of dog-breeding activity began. Veterinary specialists lost control over the sheep-dogs, hunting dogs and stray dogs. This tendency is stili developing. As a result, the percentage of infected dogs in the country increased and reached 14.8%, in some regions even 42%. The purpose of this article is to review the epizootiology and epidemiology of echinococcosis and hydatidosis in Bulgaria. The reasons of the difficult situation and the means of struggle against these helminthoses are also being discussed.
Źródło:
Annals of Parasitology; 1998, 44, 2
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Echinococcosis and hydatidosis in Bulgaria
ECHINOKOKOZA I HYDATIDOZA W BUŁGARII
Autorzy:
Kamenov, Y.
Atanassov, A.
Prelesov, P.
Kalinova, K.
Rasheva, G.
Powiązania:
https://bibliotekanauki.pl/articles/2148874.pdf
Data publikacji:
1998
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
Echinococcus granulosus
parasite
disease
infection
epizootiology
veterinary medicine
hydatidosis
dog
echinococcosis
epidemiology
larva
Bulgaria
Opis:
As far as echinococcosis and hydatidosis are concerned the situation in Bulgaria during the last 45 years has been different from the situation in other countries having permanent problems with these helminthoses. Till 1951 echinococcosis in dogs in Bulgaria was not controlled. After this period planned prophylactic treatment of sheep-dogs and hunting dogs started and control over the slaughter houses began. As a result of the long-term programme for complex struggle against these diseases significant success was achieved in Bulgaria during the 70s. and 80s. After 1985 the system of long-term struggle with echinococcosis stopped functioning. Rapid and uncontrollable development of dog-breeding activity began. Veterinary specialists lost control over the sheep-dogs, hunting dogs and stray dogs. This tendency is stili developing. As a result, the percentage of infected dogs in the country increased and reached 14.8%, in some regions even 42%. The purpose of this article is to review the epizootiology and epidemiology of echinococcosis and hydatidosis in Bulgaria. The reasons of the difficult situation and the means of struggle against these helminthoses are also being discussed.
Źródło:
Wiadomości Parazytologiczne; 1998, 44, 2; 217-226
0043-5163
Pojawia się w:
Wiadomości Parazytologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Element enrichment and provenance of the detrital component in Holocene sediments from the Western Black Sea
Autorzy:
Dekov, V.M.
Darakchieva, V.Y.
Billstrom, K.
Garbe-Schonberg, C.D.
Kamenov, G.D.
Gallinari, M.
Dimitrov, L.
Ragueneau, O.
Kooijman, E.
Powiązania:
https://bibliotekanauki.pl/articles/2079273.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
trace element concentration
isotope analysis
enrichment factor
Holocene sediment
catchment area
geochemical analysis
Black Sea
Opis:
Concentrations of a large set of major and trace elements, and Sr, Nd and Pb isotope ratios were measured in Holocene sediments cored in the western deep Black Sea in order to unravel: (1) the controls of element enrichment, and (2) sources of the detrital component. The transition of the basin from oxic to euxinic resulted in enrichment or depletion in a number of elements in the deep-sea sediments. Authigenic Fe enrichment appears to depend on the amount of Fe mobilized from the sediment through the benthic redox shuttle mechanism and free H2S in the water column (degree of “euxinization”). Manganese enrichment is controlled by diagenetic reactions within the sediment: the dissolution of Mn minerals, Mn2+ diffusion upward and reprecipitation. Barium enrichment is also controlled by diagenetic reactions, sulfate reduction and methanogenesis, that take place above and below the sulfate-methane transition, respectively. The major part of V, Co, Ni, Cu, Zn, Cr, Mo, Cd and Sb is inferred to have co-precipitated with Fe in the euxinic deep waters and to have been incorporated into authigenic Fe-sulfides. Basin reservoir effect additionally influences the Mo enrichment. The U enrichment is interpreted to have a different origin in the two organic-rich stratigraphic units (II and I). It is inferred to be: (i) at the expense of the U inventory of the deepwater pool and a result of inorganic reduction of U at euxinic conditions in the lower Unit II; and (ii) at the expense of the U inventory of the surface water pool and a result of biogenic uptake and transfer to the sediment by the plankton in the upper Unit I. The high field strength elements are closely linked to the detrital component and their depletion in the organic-rich sediments reflects a dilution of the detrital component by the biogenic one. The enrichments of REE, Sn and Th are likely controlled by adsorption on clay minerals. Sr-Nd-Pb isotope compositions of the alumino-silicate component of the studied sediments are relatively uniform. They are most likely controlled by riverine suspended matter supplied mainly in the NW Black Sea (Danube Delta) and transported southward by marine currents, and to a lesser degree by suspended matter from the small rivers draining SE Bulgaria and NW Turkey. Wind-blown dust from the Sahara Desert appears to have a minor contribution to the alumino-silicate component of the sediments. The slight shift in the Pb isotopes in Unit I upper layers is possibly caused by the addition of anthropogenic Pb.
Źródło:
Oceanologia; 2020, 62, 2; 139-163
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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