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    Wyświetlanie 1-3 z 3
    Tytuł:
    Transport parameters of selected neonicotinoids in different aquifer materials using batch sorption tests
    Autorzy:
    Pietrzak, Damian
    Kania, Jarosław
    Kmiecik, Ewa
    Powiązania:
    https://bibliotekanauki.pl/articles/2172910.pdf
    Data publikacji:
    2022
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    pesticides
    neonicotinoids
    transport parameters
    sorption
    batch tests
    soil
    Opis:
    Contamination of surface and groundwater by neonicotinoids is a global problem and requires comprehensive action by individual countries in order to identify in detail the processes affecting the transport of these pesticides, their properties, and their harmfulness to the environment. The aim of this study was to assess the transport (expressed by sorption parameters) of selected neonicotinoids in the aquatic environment, using batch tests. Tests were carried out for acetamiprid individually and a mixture of five neonicotinoids (acetamiprid, clothianidin, imidacloprid, thiacloprid, and thiamethoxam), for three different aquifer materials and quartz sand. Based on the obtained values of the sorption parameters, the greatest sorption of neonicotinoids was observed on soil with the highest content of organic matter and clay minerals content, while no sorption of these pesticides was observed on quartz sand. In addition, it was noticed that individual neonicotinoids undergo sorption to a different degree — thiacloprid was the most sorbed (R-value in the range 3.13–26.03), while thiamethoxam was the least (R-value in the range 1.89–8.41).
    Źródło:
    Geology, Geophysics and Environment; 2022, 48, 4; 367--379
    2299-8004
    2353-0790
    Pojawia się w:
    Geology, Geophysics and Environment
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Identification of transport parameters of chlorides in different soils on the basis of column studies
    Autorzy:
    Pietrzak, Damian
    Kania, Jarosław
    Kmiecik, Ewa
    Wątor, Katarzyna
    Powiązania:
    https://bibliotekanauki.pl/articles/94612.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Tematy:
    pore-water velocity
    dispersion coefficient
    dispersivity constant
    CXTFIT
    STANMOD
    współczynnik dyspersji
    stała dyspersyjności
    Opis:
    Knowledge of transport patterns of chemicals in groundwater is essential for environmental assessment of their potential impact. In the present study, the mobility of a chloride tracer injected into three different soils was investigated, using column experiments. The column tests were performed under steady-state conditions to determine parameters of chloride migration through soils. Based on breakthrough curves, pore-water velocity, dispersion coefficient and dispersivity constant were calculated for each soil sample using CXTFIT/STANMOD software. Pore-water velocity was in the range of 0.31 cm/min for fine sand, to 0.35 cm/min for silty sand and to 0.40 cm/min for vari-grained sand. The highest values of dispersion coefficient and dispersivity constant were observed for silty sand (0.55 cm2/min and 1.55 cm, respectively), while the lowest value was found for fine sand (0.059 cm2/min and 0.19 cm, respectively). Column experiments for chlorides (conservative tracer) are a preliminary stage for further research which will be undertaken to investigate migration parameters of selected neonicotinoids (reactive tracers) through different soils.
    Źródło:
    Geologos; 2019, 25, 3; 225-229
    1426-8981
    2080-6574
    Pojawia się w:
    Geologos
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Tonsillectomy in own material
    Autorzy:
    Bant, Przemysław
    Szczygielski, Kornel
    Cierniak, Szczepan
    Kosek, Jarosław
    Kania, Joanna
    Sienicki, Rafał
    Jurkiewicz, Dariusz
    Powiązania:
    https://bibliotekanauki.pl/articles/1397346.pdf
    Data publikacji:
    2020
    Wydawca:
    Index Copernicus International
    Tematy:
    chronic tonsillitis
    histopathological examination
    palatine tonsil
    tonsillar hyperthrophy
    Opis:
    Introduction: Tonsillectomy belongs to the most frequently performed surgical treatments; however, the necessity of its performance is questioned. Therefore, there are many attempts to unify and define the indications for the procedure. Aim: The main objective of the current dissertation was an analysis of the clinical symptoms occurring in patients qualified for tonsillectomy, as well as a comparison of those with a histopathological image of the removed tonsils in a repeatedly carried out, unified pathomorphological examination. The secondary objective was the designation of the demographic profile, existing comorbidities, and complications in the form of postoperative bleeding in patients after tonsillectomy in own material. Material and method: A retrospective analysis of 301 procedures of palatine tonsil removal was performed, which were completed in the years 2017–2019 at the Department of Otolaryngology with Division of Cranio-Maxillo-Facial Surgery of the Military Institute of Medicine, Warsaw, Poland. The indications were defined on the grounds of data from the anamnesis. Based on unified criteria, the removed material was divided into 2 groups: with the signs of Chronic Tonsillitis (CT) as well as Tonsillar Hyperthrophy (TH). Results: The average size of tonsils was the greatest in a group of patients under 35 years of age, and smallest in the group over 51 years of age. As patients aged, the reduction in size of the palatal tonsils was observed. In the examined group, the histopathological diagnosis in the form of HT was found in 165 patients (54.8%), while CT in 136 (45.2%). It was proven that the larger the tonsils in the clinical picture, the more often the histopathological image responded to HT. Among clinical symptoms reported by patients qualified for tonsillectomy, the following were observed: recurring tonsil inflammation in 211 (70.1%), snoring and sleep apnea in 47 (15.6%), as well as sleep apnea in 33 (11%) patients. Primary bleeding occurred in 10 patients (3.34%), and secondary in 8 patients (2.66%). The most common comorbidities were cardiovascular burdens. Conclusions: For most cases, clinical symptoms were confirmed by adequate features of removed material in histopathological examination. The most common histopathological diagnosis was tonsillar hyperthrophy.
    Źródło:
    Polish Journal of Otolaryngology; 2020, 74, 6; 29-34
    0030-6657
    2300-8423
    Pojawia się w:
    Polish Journal of Otolaryngology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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