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Wyszukujesz frazę "Peter, O." wg kryterium: Autor

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    Wyświetlanie 1-11 z 11
    Tytuł:
    Hydrophobic nature of mammalian ceramide glycanases: Purified from rabbit and rat mammary tissues
    Autorzy:
    Basu, Manju
    Dastgheib, Sara
    Girzadas, Mark
    O'Donnell, Peter
    Westervelt, Chris
    Li, Zhixiong
    Inokuchi, Jin-ichi
    Basu, Subhash
    Powiązania:
    https://bibliotekanauki.pl/articles/1044806.pdf
    Data publikacji:
    1998
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Źródło:
    Acta Biochimica Polonica; 1998, 45, 2; 327-342
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A man from Bendery: L.S. Berg as geographer and loess scholar
    Autorzy:
    Smalley, Ian
    Markovic, Slobodan
    O’Hara-Dhand, Ken
    Wynn, Peter
    Powiązania:
    https://bibliotekanauki.pl/articles/94279.pdf
    Data publikacji:
    2010
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Tematy:
    Lev Semenovich Berg
    theories of loess formation
    landscape theory
    loessification
    formacja lessowa
    krajobraz
    Opis:
    Lev Semenovich Berg was born in Bendery, in Moldova. He had great success as an ichthyologist and geographer; he also proposed, in 1916, an interesting theory of loess formation. As a biologist he was persecuted by Lysenko and the Soviet state in the time of pseudo-science in the 1930s and 1940s. Despite his being persecuted, the loess theory became, in effect, the official Soviet theory of loess formation. This theory had to be compatible with his ‘landscape’ theory which did not find favour in Marxist-Leninist geography. Berg’s loess theory was very much a geographical theory, as opposed to the geological theory of aeolian deposition, which was accepted outside the Soviet Union.Berg was hugely successful in many fields, but his contributions to loess science tend to be neglected. His ‘soil’ theory of loess formation has been widely disparaged but still has some influence in Russia. The concept of loessification may still be relevant to the later stages of deposit formation; the slow transition from metastable to collapsible may be best described as loessification.
    Źródło:
    Geologos; 2010, 16, 2; 111-119
    1426-8981
    2080-6574
    Pojawia się w:
    Geologos
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of the frequency of different Borrelia burgdorferi sensu lato species in patients with Lyme borreliosis from north-east Poland by studying preferential serologic response and DNA isolates
    Autorzy:
    Grygorczuk, S.
    Peter, O.
    Kondrusik, M.
    Moniuszko, A.
    Zajkowska, J.
    Dunaj, J.
    Zukiewicz-Sobczak, W.
    Pancewicz, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/49920.pdf
    Data publikacji:
    2013
    Wydawca:
    Instytut Medycyny Wsi
    Opis:
    Introduction and objective. Several Borrelia burgdorferi sensu lato species cause Lyme borreliosis throughout Europe and their geographic distribution may influence clinical manifestations of the disease. In Poland, Lyme borreliosis presents mainly with neurologic and cutaneous symptoms, while clinically overt arthritis is rare. The presented study investigates the prevalence of B. burgdorferi s.l. genospecies in a group of patients with different clinical forms and stages of Lyme borreliosis in north-east of Poland. This has not previously been studied. Material and methods. Preferential reactivity towards different B.burgdorferi s.l. species was investigated with a previously validated immunoblot assay in sera of 33 patients with disseminated Lyme borreliosis: 10 with neuroborreliosis, 6 with acrodermatitis chronica atrophicans and 17 with osteoarticular symptoms. Also typed were B.burgdorferi s.l. DNA isolated from the skin and synovial fluid of 7 patients with erythema migrans, acrodermatitis chronic atrophicans and arthritis. Results. Preferential reactivity was detected in 30 out of 33 serum samples. Of these, 25 reacted preferentially with B.afzelii, 3 with B. garinii and 2 with B. burgdorferi ss. B.burgdorferi DNA was isolated from all studied samples and typed as B.afzelii in 5. In a patient with acrodermatitis chronica atrophicans studied with both methods simultaneously, B.afzelii was identified by both genotyping and serotyping. Conclusions. Both methods gave consistent results, indicating B.afzelii as the main agent of all the clinical forms of the Lyme borreliosis in the study area.
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2013, 20, 1
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Soil erosion susceptibility mapping of Imo River Basin using modified geomorphometric prioritisation method
    Autorzy:
    Nwilo, Peter C.
    Ogbeta, Caleb O.
    Daramola, Olagoke E.
    Okolie, Chukwuma J.
    OrJi, Michael J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2054950.pdf
    Data publikacji:
    2021-09-01
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Tematy:
    morphometry
    weighted sum analysis
    soil erosion susceptibility
    SRTM
    remote sensing
    GIS
    Imo River Basin
    Opis:
    Gullies and other forms of erosion have been the greatest environmental problem and catastrophe in most high- and low-income countries. The challenge posed by soil erosion has compromised agricultural productivity, en-vironmental biodiversity and food safety for the world’s population. It is important to identify vulnerable areas to soil erosion in each region to initiate remedial measures. This study demonstrates the use of watershed morphometry coupled with weighted sum analysis (WSA) to estimate the soil erosion susceptibility of the Imo River Basin sub-wa-tersheds (SWs) in South-Eastern Nigeria using satellite remote-sensing data and geographic information system (GIS) analysis. To this end, Shuttle Radar Topography Mission (SRTM), a Digital Elevation Model (DEM) with 30 m spatial resolution was used to extract and analyse 18 morphometric parameters including basic, linear, shape and relief. The method of receiver operating characteristics (ROC) curves was used to validate the model’s prediction accuracy. This morphometry-based analysis resulted in the SWs being classified into zones of low, medium, high and very high erosion susceptibility. With regard to erosion susceptibility, 41.51% of the basin (2494.68 km2) is in the very high pri-ority zone; while 10.50%, 44.33% and 3.66% of the basin are in the high, medium and low priority zones respectively. Validation of the final erosion susceptibility map showed a prediction accuracy of 81%. The use of satellite imagery and morphometric analysis in this study was cost- and time-effective for identifying areas susceptible to soil erosion.
    Źródło:
    Quaestiones Geographicae; 2021, 40, 3; 143-162
    0137-477X
    2081-6383
    Pojawia się w:
    Quaestiones Geographicae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The multinational joint task force and Nigerian counter-terrorism operations in the lake chad region
    Autorzy:
    Olawoyin, Kayode Wakili
    Akinrinde, Olawale Olufemi
    Irabor, Peter O.
    Powiązania:
    https://bibliotekanauki.pl/articles/1920236.pdf
    Data publikacji:
    2021-09-10
    Wydawca:
    Fundacja Copernicus na rzecz Rozwoju Badań Naukowych
    Tematy:
    terrorism
    Counter-Terrorism
    Lake Chad Region
    MNJTF
    Regional Military Force
    Opis:
    The dynamics of terrorism and its transnational implications in the Lake Chad region necessitated a regional security engagement between Nigeria and its immediate neighbors. This led to the formation of the Multinational Joint Task Force (MNJTF). The operation of this regional military force has been attracting attention due to cases of terrorist attacks in the region. Relying on secondary sources of data and using desk review method, this study examines the impact of counter-terrorism operations of the MNJTF in the Lake Chad region and assesses the challenges the force faces during counter-terrorism operations in Nigeria. The study found that the MNJTF counter-terrorism operation has been largely focused on coordinating national contingents, which operate following different rules and report to respective member states. As a result, counter-terrorism operations in the Lake Chad region remain uncoordinated. Considering the split of the main terrorist forces into different factions, as well as the fact that inter-agency coordination and cooperation between the Nigerian military and other security forces has been poor, the study established that terrorist groups usually seek refuge along the Cameroon and Chad borders, creating an environment for resilience along the Nigerian borders with its neighbors in the Lake Chad region. The study concluded that terrorist groups adapt to the nature of MNJTF counter-terrorism operations, while terrorists’ knowledge of the area and ties to the local population make it necessary for MNJTF to also recruit help from the local communities in order to curb terrorism in the Lake Chad region.
    Źródło:
    The Copernicus Journal of Political Studies; 2021, 1; 115-135
    2299-4335
    Pojawia się w:
    The Copernicus Journal of Political Studies
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Half-Logistic Odd Power Generalized Weibull-G Family of Distributions
    Autorzy:
    Peter, Peter O.
    Chipepa, Fastel
    Oluyede, Broderick
    Makubate, Boikanyo
    Powiązania:
    https://bibliotekanauki.pl/articles/2119924.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    half logistic distribution
    half logistic-G distribution
    Weibull generalized-G distribution
    maximum likelihood estimation
    Opis:
    We develop and study in detail a new family of distributions called Half- logistic Odd Power Generalized Weibull-G (HLOPGW-G) distribution, which is a linear combination of the exponentiated-G family of distributions. From the special cases considered, the model can fit heavy tailed data and has non-monotonic hazard rate functions. We further assess and demonstrate the performance of this family of distributions via simulation experiments. Real data examples are given to demonstrate the applicability of the proposed model compared to several other existing models.
    Źródło:
    Central European Journal of Economic Modelling and Econometrics; 2022, 1; 1-35
    2080-0886
    2080-119X
    Pojawia się w:
    Central European Journal of Economic Modelling and Econometrics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    TIG Welding of Ti6Al4V: Effect of Ti6Al4V ELI as Filler Metal
    Autorzy:
    Omoniyi, Peter O.
    Mahamood, Rasheedat. M.
    Adeleke, Adekunle A.
    Ikubanni, Peter P.
    Akinlabi, Stephen A.
    Akinlabi, Esther Titilayo
    Powiązania:
    https://bibliotekanauki.pl/articles/28099517.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    fusion welding
    microhardness
    tensile strength
    Ti6Al4V
    TiG
    Opis:
    Titanium and its alloys have significant uses in the biomedical, chemical, and aerospace industries. In this article, the current and gas flow rates were varied using Taguchi’s experiment design. The mechanical properties of the welded joint made using tungsten inert gas (TIG) welding and Ti6Al4V ELI as filler metal was characterized using the microstructure, microhardness, and tensile strength. The joint was classified into three regions, namely, fusion zone (FZ), heat affected zone (HAZ), and base metal (BM). Results show martensitic microstructure within the fusion zone (FZ) and the heat affected zone (HAZ), which resulted in an increased hardness within the fusion and heat affected zone.
    Źródło:
    Archives of Metallurgy and Materials; 2023, 68, 2; 769--773
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-11 z 11

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