Autor: Michalski, G. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Synthesis and characterization of high-molar-mass star-shaped poly(l-lactide)s
Synteza i charakterystyka gwiaździstych poli(l-laktydów) o dużych masach molowych
Autorzy:: Michalski, A.
Łapienis, G.
Powiązania:: https://bibliotekanauki.pl/articles/947098.pdf
Data publikacji:: 2018
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
Tematy:: poly(l-lactide)
stabilization
DSC
NMR
thermal properties
poli(l-laktyd)
stabilizacja
właściwości termiczne
Opis:: The synthesis of high-molar-mass linear and 6-arm star-shaped poly(l-lactide)s(PLLA’s) is presented. Dipentaerythritol and benzyl alcohol were used asinitiators and Sn(Oct)2 was applied asa catalyst in the ring-opening polymerization (ROP) of l-lactide (l-LA) carried out at 130 °C. The prepared PLLA’s were characterized by SEC (size exclusion chromatography), 1H NMR (proton nuclear magnetic resonance spectroscopy), DSC (differential scanning calorimetry), and TGA (thermogravimetric analysis). The structure of the obtained star-shaped polymers was confirmed by comparison of the radii of gyration (Rg) determined by SEC for the linear and star macromolecules. The thermal properties of PLLA’s were shown for the wide range of molar masses. Additionally, it was confirmed that Irganox stabilizer has an influence on the thermal stability of PLLA’s.
Przedstawiono syntezę liniowych i 6-ramiennych gwiaździstych poli(l-laktydów)(PLLA) o dużych masach molowych. Polimeryzację z otwarciem pierścienia (ROP) l-laktydu(l-LA) inicjowaną dipentaerytrytem oraz alkoholem benzylowym prowadzono w temperaturze130 °C wobec Sn(Oct)2 jako katalizatora. Otrzymane PLLA scharakteryzowano za pomocą SEC (chromatografia żelowa), 1HNMR (spektroskopia magnetycznego rezonansu jądrowego), DSC (różnicowa kalorymetria skaningowa) i TGA (analiza termograwimetryczna). Strukturę otrzymanych polimerów gwiaździstych potwierdzono przez porównanie wyznaczonych w SEC promieni bezwładności (Rg) dla gwiaździstych iliniowych makrocząsteczek. Właściwości termiczne PLLA przedstawiono dla szerokiego zakresu mas molowych. Dodatkowo potwierdzono, że stabilizator Irganox ma wpływ na stabilność termiczną PLLA.
Źródło:: Polimery; 2018, 63, 7-8; 488-494
0032-2725
Pojawia się w:: Polimery
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 2.

Tytuł:: First molecular characterization of Dobrava-Belgrade virus found in Apodemus flavicollis in Poland
Autorzy:: Kolodziej, M.
Melgies, A.
Joniec-Wiechetek, J.
Michalski, A.
Nowakowska, A.
Pitucha, G.
Niemcewicz, M.N.
Powiązania:: https://bibliotekanauki.pl/articles/2081717.pdf
Data publikacji:: 2018
Wydawca:: Instytut Medycyny Wsi
Tematy:: Polska
phylogenetic analysis
Apodemus flavicollis
Dobrava-Belgrade virus
orthohantaviruses
Opis:: Introduction. Dobrava-Belgrade virus (DOBV) is one of the emerging pathogens which have been reported during the last decades in Europe and have attracted the attention of researchers. The course of infection among humans may have a varied course – from the completely asymptomatic to the more severe forms, such as haemorrhagic fever with renal syndrome (HFRS). DOBV is hosted and carried by rodents like Apodemus flavicollis or A. agrarius, which occur commonly in Europe. Objective. To-date, orthohantaviruses have been reported in Poland, both in humans and animals, but detailed countryscale studies have not yet been carried out. The aim of the study was molecular characterization of a strain which was found in A. flavicollis in south-eastern Poland. Materials and method. The phylogenetic analysis of the first Dobrava-Belgrade virus found in A. flavicollis in the subcarpathian region of south-eastern Poland, presented in this study, was performed after virus proliferation in cell culture and sequencing of specific PCR products. Results. Based on genetic sequences of fragments of three segments (S, M and L), the isolated virus was assigned to the Dobrava genotype, taking into consideration the most current classification of the DOBV species. Conclusions. The Dobrava-Belgrade virus strain isolated from A. flavicollis in the subcarpathian region of south-eastern Poland, has been molecularly characterized and assigned to Dobrava genotype, thereby the occurrence of that genotype in Poland has been confirmed by molecular techniques.
Źródło:: Annals of Agricultural and Environmental Medicine; 2018, 25, 2; 368-373
1232-1966
Pojawia się w:: Annals of Agricultural and Environmental Medicine
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 3.

Tytuł:: Severe Influenza Outbreak in Western Ukraine in 2009 – a molecular-epidemiological study
Autorzy:: Kocik, J.
Niemcewicz, M.
Johns, M.
Jerke, K.
Michalski, A.
Bielecka, A.
Lasocki, K.
Gawel, J.
Bielawska-Drozd, A.
Joniec, J.
Kolodziej, M.
Graniak, G.
Goniewicz, M.
Kubiak, L.
Powiązania:: https://bibliotekanauki.pl/articles/50555.pdf
Data publikacji:: 2013
Wydawca:: Instytut Medycyny Wsi
Opis:: Introduction: In the autumn of 2009 the authors participated in a humanitarian operation in Western Ukraine by undertaking an epidemiological investigation of an influenza-like-illness (ILI) in the L’viv Oblast region. Mobile biological survey teams took samples from civilian patients with severe acute respiratory distress syndrome, rapid transportation of the samples, and their molecular analysis in Poland to provide accurate results. Objective: The aim of the study was the molecular and epidemiological analysis of the biological samples collected. Material and Methods: Real-time reverse transcriptase polymerase chain reaction (real-time RT-PCR), multiplex PCR techniques, traditional Sanger Sequencing and classical viral culture methods were used. Results: Among the 124 influenza-like illness cases, ~50% (58) were positive for influenza A virus in WHO-CDC molecular assay, including subtyping. The specimens were further analyzed to confirm results and determine the genetic sequence. Phylogenetically, the nucleotide similarity of both the Ukraine specimens and reference A/California/7/2009 (pH1N1) was 99.2–99.3%. Oseltamivir resistance was not registered. HA1 region characterization showed an overall protein identity of 98.5–99.4%. Conclusions: An unexpected high contribution of influenza A was confirmed among ILI patients, as well as a very limited number of other detected viruses, indicate that the 2009 epidemic in western Ukraine was strongly related to novel influenza A/H1N1. The importance of swift sharing of information and reference laboratories networking in surveillance, as well as serving governments and international agencies in pursuing adequate actions, should be stressed.
Źródło:: Annals of Agricultural and Environmental Medicine; 2013, 20, 3
1232-1966
Pojawia się w:: Annals of Agricultural and Environmental Medicine
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 4.

Tytuł:: Acute respiratory distress syndrome (ARDS) in the course of influenza A/H1N1v infection – genetic aspects
Autorzy:: Niemcewicz, M.
Pajak, B.
Michalski, A.
Kocik, J.
Kolodziej, M.
Joniec, J.
Graniak, G.
Gawel, J.
Marciniak-Niemcewicz, A.
Kucharczyk, K.
Prystupa, A.
Witczak, A.
Lasocki, K.
Naylor, K.
Goniewicz, M.
Powiązania:: https://bibliotekanauki.pl/articles/49651.pdf
Data publikacji:: 2013
Wydawca:: Instytut Medycyny Wsi
Źródło:: Annals of Agricultural and Environmental Medicine; 2013, 20, 4
1232-1966
Pojawia się w:: Annals of Agricultural and Environmental Medicine
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Informacja

Wyszukujesz frazę "Michalski, G." wg kryterium: Autor

Źródło danych

Dostawca treści

Kolekcja

Rok wydania

Wydawca

Temat

Autor

Typ dokumentu

Język