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Wyświetlanie 1-8 z 8
Tytuł:
Tornada w Stanach Zjednoczonych w latach 1950–2009
Tornadoes in the United States of America in years 1950–2009
Autorzy:
Burdzy, J.
Powiązania:
https://bibliotekanauki.pl/articles/2084514.pdf
Data publikacji:
2011
Wydawca:
Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
Opis:
The aim of this study is to characterize the phenomenon of a whirlwind and analysis of their appearing in the United States. On a large scale appearing tornadoes were traced in years 1950-2009. Presented are the conditions under which air vortices are formed, a detailed division of their and specific properties. In the examined time it appeared in the USA over 50 thousand of tornadoes. Were registered 148 cases of so-called „tornado outbreak”, in frames which were created almost 7680 air vortices. They showed that tornadoes were appearing mainly in spring (most in May), in the afternoon. They are usually hitting such states as: Kansas, Oklahoma, Missouri, Illinois, and Texas. Cycles of whirlpools most often turn up about lowest intensity at the Fujity scale (F0) which a few more dangerous phenomena usually accompany (F4 or F5). In final years is being registered an increase in the frequency of whirlwinds. Better methods of monitoring these phenomena influence on it. They contribute to the improvement of the system such as warning people against the element. Year after year, this decreasing the balance of victims and people affected by the tornadoes.
Źródło:
Prace i Studia Geograficzne; 2011, 47; 493-501
0208-4589
Pojawia się w:
Prace i Studia Geograficzne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zakażenie wszy Polypax spinulosa i Hoplopleura acanthopus pałeczkami Brucella brucei
The infection of the louse Polypax spinulosa and Hoplopleura acanthopus with thebacilli Brucella brucei
Infekcija vshejj Polypax spinulosa i Hoplopleura acanthopus pri pomoshhi palochek Brucella brucei
Autorzy:
Parnas, J.
Zwolski, W.
Burdzy, K.
Powiązania:
https://bibliotekanauki.pl/articles/837923.pdf
Data publikacji:
1960
Wydawca:
Polskie Towarzystwo Parazytologiczne
Opis:
There was noted a high grade of sensibility of the louse Polyplax spinulosa Burm on the infoction with the virulent bacilli Brucella brucei. There was also proved a great sensibility of the louse Hoplopieura acanthopus on the infection with Brucella, this time with non-virulent strain S₁₉. We failed to infect experimentally the mite Gamasides with the bacilli Brucella which confirmed the results of our former experiments. In the investigations of the structure of colony, the activity of enzymes, the production of H₂S and the sensibility on thionine and fuchsine, the strains isolated from the louse Polyplax spinulosa Burm. were not different from the same strains before their entrance into the organism of the louse. Hamsters Mesocricetus auratus proved very little sensible on the infection with the virulent bacilli Brucella brucei. The results of the quoted experiments indicate the role of the louse in the circulation of bacilli Brucella among animals.
Źródło:
Annals of Parasitology; 1960, 06, 5
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zakażenie wszy Polypax spinulosa i Hoplopleura acanthopus pałeczkami Brucella brucei
The infection of the louse Polypax spinulosa and Hoplopleura acanthopus with thebacilli Brucella brucei
Infekcija vshejj Polypax spinulosa i Hoplopleura acanthopus pri pomoshhi palochek Brucella brucei
Autorzy:
Parnas, J.
Zwolski, W.
Burdzy, K.
Powiązania:
https://bibliotekanauki.pl/articles/2180233.pdf
Data publikacji:
1960
Wydawca:
Polskie Towarzystwo Parazytologiczne
Opis:
There was noted a high grade of sensibility of the louse Polyplax spinulosa Burm on the infoction with the virulent bacilli Brucella brucei. There was also proved a great sensibility of the louse Hoplopieura acanthopus on the infection with Brucella, this time with non-virulent strain S₁₉. We failed to infect experimentally the mite Gamasides with the bacilli Brucella which confirmed the results of our former experiments. In the investigations of the structure of colony, the activity of enzymes, the production of H₂S and the sensibility on thionine and fuchsine, the strains isolated from the louse Polyplax spinulosa Burm. were not different from the same strains before their entrance into the organism of the louse. Hamsters Mesocricetus auratus proved very little sensible on the infection with the virulent bacilli Brucella brucei. The results of the quoted experiments indicate the role of the louse in the circulation of bacilli Brucella among animals.
Źródło:
Wiadomości Parazytologiczne; 1960, 06, 5; 441-445
0043-5163
Pojawia się w:
Wiadomości Parazytologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wrażliwość Microtus arvalis i niektórych stawonogów na zakażenie wirusem grypy
Susceptibility of Microtus arvalis and some Arthopoda on infection with the virus of influenza
Chuvstvitel'nost' Microtus arvalis i nekotorykh chlenistonogikh k infekcii na virus grippa
Autorzy:
Parnas, J.
Szczygielska, J.
Zwolski, W.
Burdzy, K.
Powiązania:
https://bibliotekanauki.pl/articles/836306.pdf
Data publikacji:
1960
Wydawca:
Polskie Towarzystwo Parazytologiczne
Opis:
The experiments I and II were conducted on 2 white mice, 5 Microtus arvalis, 2 Gamasides, 91 Hoplopleura acanthopus and 200 Polyplax spinulosa. For the experiments the influenza virus PR8 was used) As regards Microtus arvalis it was proved, that it is susceptible to the virus of influenza PR8. The susceptibility of Microtus arvalis proved to be not lower than that of white mice. The virus of influenza PR8 was isolated from the lungs of all the examined white mice and Microtus arvalis. In not a single case, however, the virus could be isolated from the Gamasides, neither from the Hoplopleura acanthopus nor from the Polyplax spinulosa in spite of the fact that undoubtedly in all the exarnined mice the virusal infection run in the from of virusemia. This is an indication that the Gamasides, Hoplopleura acanthopus and Polyplax spinulosa could not be infected with the virus of influenza PR8 (or that the virus was destroyed after the penetration to the organism of the Arthropoda with the blood of the host). The experiments should be repeated on a larger materiał and the virusemia of mice should be submitted to control. It appears that Microtus arvalis is a suitable animal for experimental infection with the virus of influenza.
Źródło:
Annals of Parasitology; 1960, 06, 6
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wrażliwość Microtus arvalis i niektórych stawonogów na zakażenie wirusem grypy
Susceptibility of Microtus arvalis and some Arthopoda on infection with the virus of influenza
Chuvstvitel'nost' Microtus arvalis i nekotorykh chlenistonogikh k infekcii na virus grippa
Autorzy:
Parnas, J.
Szczygielska, J.
Zwolski, W.
Burdzy, K.
Powiązania:
https://bibliotekanauki.pl/articles/2180241.pdf
Data publikacji:
1960
Wydawca:
Polskie Towarzystwo Parazytologiczne
Opis:
The experiments I and II were conducted on 2 white mice, 5 Microtus arvalis, 2 Gamasides, 91 Hoplopleura acanthopus and 200 Polyplax spinulosa. For the experiments the influenza virus PR8 was used) As regards Microtus arvalis it was proved, that it is susceptible to the virus of influenza PR8. The susceptibility of Microtus arvalis proved to be not lower than that of white mice. The virus of influenza PR8 was isolated from the lungs of all the examined white mice and Microtus arvalis. In not a single case, however, the virus could be isolated from the Gamasides, neither from the Hoplopleura acanthopus nor from the Polyplax spinulosa in spite of the fact that undoubtedly in all the exarnined mice the virusal infection run in the from of virusemia. This is an indication that the Gamasides, Hoplopleura acanthopus and Polyplax spinulosa could not be infected with the virus of influenza PR8 (or that the virus was destroyed after the penetration to the organism of the Arthropoda with the blood of the host). The experiments should be repeated on a larger materiał and the virusemia of mice should be submitted to control. It appears that Microtus arvalis is a suitable animal for experimental infection with the virus of influenza.
Źródło:
Wiadomości Parazytologiczne; 1960, 06, 6; 529-531
0043-5163
Pojawia się w:
Wiadomości Parazytologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
O badaniach zoologicznych, mikrobiologicznych i parazytologicznych w czasie ekspedycji organizowanych dla opracowania ognisk naturalnych antropozoonoz
On zoological, microbiological and parasitological investigations during the expeditions organized for exploration of natural foci of anthropozoonoses
O zoologocheskikh, mikrobiologicheskikh i parazitologicheskikh issledovanijakh vo vremja ehkspedicijj organizovannykh dlja razrabotki prirodnykh ocharov antropozoonozov
Autorzy:
Parnas, J.
Zwolski, W.
Łazuga, K.
Koślak, A.
Umiński, J.
Burdzy, K.
Powiązania:
https://bibliotekanauki.pl/articles/2180147.pdf
Data publikacji:
1960
Wydawca:
Polskie Towarzystwo Parazytologiczne
Opis:
1. The map presented shows complex field investigations undertaken by various institutes and aiming at research on diseases with natural foci. In 1953 and further, in the years 1955-1959 systematical zoological-ecological investigations were carried out in the foci of Szczecin and Lublin areas, the results of which are shown in table I. In the region of the Szczecin province 3 358 mammals were examined, and in the Lublin area 4 501 small mammals (partially other animals, too). 2. Ectoparasites were recovered from 2 200 mammals caught in the Lublin district. In the material collected in the period from 1.7.1957. to 1.7.1959. were found: 4 052 lice, 1946 fleas, 507 ticks of the Ixodidae family and some thousands of small Parasitoformes (tables II, III, IV). 3. From Microtus arvalis caught in natural foci of leptospirosis the following ectoparasites were examined on Brucella and Leptospira: Laelaptidae - 677 individuals, Hoplopleura acanthopus - 299, fleas - 9. The results of microbiological investigations were negative. 4. A negative result was also obtained with larvae and nymphs of Ixodes ricinus fed on 4 guinea pigs, 8 white mice and 4 Microtus arvalis, infected with a Leptospira grippotyphosa strain. 5. 278 lice Hoplopleura acanthopus were fed on Microtus arvalis infected with a virulent Brucella brucei strain, and a pure culture of this microorganism was isolated from them. This may evidence of a possible role of lice in the epizootiology of brucellosis in natural foci.
Źródło:
Wiadomości Parazytologiczne; 1960, 06, 2-3; 125-140
0043-5163
Pojawia się w:
Wiadomości Parazytologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
O badaniach zoologicznych, mikrobiologicznych i parazytologicznych w czasie ekspedycji organizowanych dla opracowania ognisk naturalnych antropozoonoz
On zoological, microbiological and parasitological investigations during the expeditions organized for exploration of natural foci of anthropozoonoses
O zoologocheskikh, mikrobiologicheskikh i parazitologicheskikh issledovanijakh vo vremja ehkspedicijj organizovannykh dlja razrabotki prirodnykh ocharov antropozoonozov
Autorzy:
Parnas, J.
Zwolski, W.
Lazuga, K.
Koslak, A.
Uminski, J.
Burdzy, K.
Powiązania:
https://bibliotekanauki.pl/articles/839458.pdf
Data publikacji:
1960
Wydawca:
Polskie Towarzystwo Parazytologiczne
Opis:
1. The map presented shows complex field investigations undertaken by various institutes and aiming at research on diseases with natural foci. In 1953 and further, in the years 1955-1959 systematical zoological-ecological investigations were carried out in the foci of Szczecin and Lublin areas, the results of which are shown in table I. In the region of the Szczecin province 3 358 mammals were examined, and in the Lublin area 4 501 small mammals (partially other animals, too). 2. Ectoparasites were recovered from 2 200 mammals caught in the Lublin district. In the material collected in the period from 1.7.1957. to 1.7.1959. were found: 4 052 lice, 1946 fleas, 507 ticks of the Ixodidae family and some thousands of small Parasitoformes (tables II, III, IV). 3. From Microtus arvalis caught in natural foci of leptospirosis the following ectoparasites were examined on Brucella and Leptospira: Laelaptidae - 677 individuals, Hoplopleura acanthopus - 299, fleas - 9. The results of microbiological investigations were negative. 4. A negative result was also obtained with larvae and nymphs of Ixodes ricinus fed on 4 guinea pigs, 8 white mice and 4 Microtus arvalis, infected with a Leptospira grippotyphosa strain. 5. 278 lice Hoplopleura acanthopus were fed on Microtus arvalis infected with a virulent Brucella brucei strain, and a pure culture of this microorganism was isolated from them. This may evidence of a possible role of lice in the epizootiology of brucellosis in natural foci.
Źródło:
Annals of Parasitology; 1960, 06, 2-3
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect of Successive Stages of the Melting Process on the Nucleation of Ductile Cast Iron
Autorzy:
Kołakowski, Jakub
Brzeżański, Mateusz
Burdzy, Daniel
Sobieraj, J.
Urbanowicz, M.
Paruch, T.
Janerka, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/27314118.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
grey cast iron
ductile cast iron
inoculation
DTA
eutectic temperature
nucleation
żeliwo szare
żeliwo sferoidalne
inokulacja
temperatura eutektyczna
ziarna
Opis:
The article discusses issues related to the melting of grey and ductile cast iron in terms of metallurgical quality. The derivative and thermal analysis (DTA) was used to assess this quality. The article presents the results of research carried out in industrial conditions and analysed by the Itaca system. In the paper, the effect of the furnace type, the charge materials and the inoculation process on the parameters characterising the cast iron being melted was analysed. The most important of these are the minimum eutectic temperature (Temin), the liquidus temperature (Tliquidus) and the nucleation rate. The results of the research and calculations are shown in graphs and as dependencies. Some of DTA results were compared to the microstructure analysis results. The article shows that the derivative and thermal analysis is a very effective tool in the assessment of the metallurgical quality of cast iron. It is a very good addition to chemical analysis. Based on the results of the research, it was concluded that a very high correlation exists between the rate of nucleation (DTA) and the number of graphite nuclei (microstructure analysis). Furthermore, it was also found that an improvement in nucleation could be achieved by ensuring a high value of carbon equivalent (CE) and, above all, by conducting the primary and secondary inoculation processes, respectively.
Źródło:
Archives of Foundry Engineering; 2023, 23, 1; 61--67
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-8 z 8

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