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    Wyświetlanie 1-6 z 6
    Tytuł:
    Nowe media - nowe dziennikarsto - ?
    Autorzy:
    Mielcarek, Małgorzata
    Powiązania:
    https://bibliotekanauki.pl/articles/629550.pdf
    Data publikacji:
    2010
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Opis:
    The article shows the transformation of journalists’ and information’s functions, basing on the examples coming straight from the internet as it is the cause of all changes. Because of the new media, these functions are far more different today than 20 years ago. Traditional journalism is changing because of the Internet. At the same time, it is also coping with the new reality of presenting news. The question is: Can we call it the new journalism? Journamorfosis in Poland is definitely slower than in other countries. However, it is happening. There is higher control over journalists, even taking away their duties. The author proves that Polish journalism, thanks to the new media, finds itself in a different point than 20 years ago and it is still changing.
    Źródło:
    Refleksje. Pismo naukowe studentów i doktorantów WNPiD UAM; 2010, 2; 11-21
    2081-8270
    Pojawia się w:
    Refleksje. Pismo naukowe studentów i doktorantów WNPiD UAM
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The influence of the deacetylation degree of chitosan in the form of flakes on the effectiveness of nitrates v sorption from aqueous solutions
    Autorzy:
    Jóźwiak, Tomasz
    Filipkowska, Urszula
    Bugajska, Paula
    Kuczajowska-Zadrożna, Małgorzata
    Mielcarek, Artur
    Powiązania:
    https://bibliotekanauki.pl/articles/1034527.pdf
    Data publikacji:
    2018
    Wydawca:
    Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
    Tematy:
    chitosan
    deacetylation degree
    nitrate
    sorption
    Opis:
    The influence of the degree of deacetylation of chitosan from the range of DD = 75–90% on the effectiveness of sorption of nitrates from aqueous solutions was investigated. The scope of the research included: determining the effect of pH on the effectiveness of N-NO3 binding on chitosan sorbents and determining the sorption capacity of chitosan sorbents with different degrees of deacetylation after 5, 15, 30 and 60 minutes. The effectiveness of sorption of nitrates on chitosan sorbents increased in the series DD=75% < DD=85% < DD=90%. Regardless of the degree of deacetylation, the sorption effectiveness of nitrates on chitosan was the highest at pH 4. The amount of nitrate-related sorbents was the highest after 30 min of sorption. A process time which was too long resulted in desorption of nitrates. The maximum sorption capacity for chitosan with the degree of deacetylation DD = 75, 85 and 90% was 0.59 mg N-NO3/g, 0.60 mg N-NO3/g and 0.87 mg N-NO3/g, respectively.
    Źródło:
    Progress on Chemistry and Application of Chitin and its Derivatives; 2018, 23; 88-96
    1896-5644
    Pojawia się w:
    Progress on Chemistry and Application of Chitin and its Derivatives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Removal of dyes from aqueous solutions by glauconite immobilised on chitosan hydrogel beads
    Autorzy:
    Jóźwiak, Tomasz
    Filipkowska, Urszula
    Szymczyk, Paula
    Kuczajowska-Zadrożna, Małgorzata
    Mielcarek, Artur
    Powiązania:
    https://bibliotekanauki.pl/articles/1034580.pdf
    Data publikacji:
    2017
    Wydawca:
    Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
    Tematy:
    Basic Violet 10
    Reactive Black 5
    chitosan
    glauconite
    hydrogel beads
    immobilisation
    sorption
    Opis:
    The sorption capacity of glauconite, glauconite immobilised on chitosan hydrogel beads and unmodified chitosan hydrogel beads against Reactive Black 5 and Basic Violet 10 was compared in this article. The effect of pH on the sorption effectiveness of dyes on the tested sorbents was investigated and the sorption capacity of sorbents after 24 and 72 h was determined. Langmuir sorption, double Langmuir and Freundlich isotherms were used to describe the experimental data. The adsorption efficiency of the dyes on sorbents containing chitosan was highest at pH 4. In the case of glauconite, Reactive Black 5 removal efficiency was the highest at pH 3, and Basic Violet 10 removal efficiency was highest at pH 2. The sorption capacity of glauconite immobilised on chitosan hydrogel spheres obtained after 72 h was -656.73 mg/g and -32.77 mg/g for Reactive Black 5 and Basic Violet 10, respectively.
    Źródło:
    Progress on Chemistry and Application of Chitin and its Derivatives; 2017, 22; 54-65
    1896-5644
    Pojawia się w:
    Progress on Chemistry and Application of Chitin and its Derivatives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of chitosan ionically crosslinked with sodium edetate for reactive dyes removal from aqueous solutions
    Autorzy:
    Jóźwiak, Tomasz
    Filipkowska, Urszula
    Szymczyk, Paula
    Kuczajowska-Zadrożna, Małgorzata
    Mielcarek, Artur
    Powiązania:
    https://bibliotekanauki.pl/articles/1034883.pdf
    Data publikacji:
    2015
    Wydawca:
    Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
    Tematy:
    chitosan beads
    crosslinking
    dyes sorption
    sodium edetate
    Opis:
    In this study, we investigated the effect of chitosan crosslinking with sodium edetate (SE) on its sorption capacity of Reactive Black 5 and Reactive Yellow 84 dyes. The first stage of the study allowed establishing conditions of chitosan crosslinking. The process of ionic crosslinking was effective only at pH 4 and at the optimal dose of sodium edetate ranging from 0.046 to 0.462 g/g CHs. Process temperature in the range of 20-60oC had no significant effect on the stability of crosslinked chitosan. Contrary to the non-crosslinked chitosan (CHs), chitosan crosslinked with sodium edetate (CHs-SE) was capable of dyes sorption at pH 3. Sorption of reactive onto both CHs and CHs-SE was the most effective at pH 4. Chitosan crosslinking with SE had a positive effect on the effectiveness of RB5 and RY84 sorption. This effect was especially tangible within the first ten or so hours of sorption. After 24 h of the process, the sorption capacity of CHs-SE against RB5 and RY84 reached 1296.69 mg/g and 1883.62 mg/g, respectively. In the case of CHs, sorption capacity achieved after the same time was lower and accounted for 1025.55 mg RB5/g and 1539.67 mg RY84/g.
    Źródło:
    Progress on Chemistry and Application of Chitin and its Derivatives; 2015, 20; 82-96
    1896-5644
    Pojawia się w:
    Progress on Chemistry and Application of Chitin and its Derivatives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Znaczenie postępowania pooperacyjnego w operacjach czynnościowych nosa i zatok przynosowych
    Autorzy:
    Mielcarek-Kuchta, Daniela
    Leszczyńska, Małgorzata
    Szyfter, Witold
    Wielgosz, Romuald
    Pastusiak, Tomasz
    Powiązania:
    https://bibliotekanauki.pl/articles/1398707.pdf
    Data publikacji:
    2008
    Wydawca:
    Index Copernicus International
    Tematy:
    postępowanie pooperacyjne
    chirurgia FESS (endoskopowa)
    Opis:
    Introduction. In this work we wish to emphasize the importance of postoperative care of patients who underwent FESS in ENT Department Medical University in Poznań. We feel that too little attention is still being paid to this treatment as we mostly focus on surgery. Material and methods. Our observation are based on nine year experience in functional endoscopic sinus surgery. The analysis covers patients hospitalized in our Department from January 1998 to August 2007. The schedule of postoperative care has been presented. Results. 1463 FESS operation were carried out in our Department from January 1998 to August 2007. Similar postoperative procedures were used with each patient. Full recovery of mucous membrane depended on a few parameters such as: if the patient underwent FESS for the fi rst time, what kind of changes were observed: polips or chronic infection, as well as the method of surgery (“aggressive” versus “delicate”). Healing time ranged from 6 week to 3 month. Conclusions. The scheme of procedures employed comes useful in postoperative treatment after FESS.
    Źródło:
    Polish Journal of Otolaryngology; 2008, 62, 6; 705-709
    0030-6657
    2300-8423
    Pojawia się w:
    Polish Journal of Otolaryngology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The influence of chitosan deacetylation degree on reactive black 5 sorption efficiency from aqueous solutions
    Autorzy:
    Jóźwiak, Tomasz
    Filipkowska, Urszula
    Szymczyk, Paula
    Kuczajowska-Zadrożna, Małgorzata
    Mielcarek, Artur
    Zyśk, Michał
    Powiązania:
    https://bibliotekanauki.pl/articles/1034679.pdf
    Data publikacji:
    2016
    Wydawca:
    Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
    Tematy:
    Reactive Black 5
    chitosan
    deacetylation degree
    sorption
    Opis:
    In the paper sorption capacity of chitosan having a deacetylation degree DD=75%, DD=85% and DD=90% relatively to the Reactive Black 5 were compared. Studies on the effectiveness of the dye sorption were carried out in a wide pH range – from 3 to 11. For each of the tested chitosan sorbents, sorption capacity has been determined. The results were described by isotherms Freundlich and Lagmuir isotherms, and a double Langmuir isotherm. Sorption of Reactive Black 5 most efficiently occurred at pH 4. At pH <4 chitosan sorbents underwent dissolution, regardless of the degree of deacetylation. The efficiency of dye sorption increased with the degree of deacetylation. The sorption capacity calculated after 12 h of the chitosan sorption with DD=75%, DD=85% and DD =90% was, relatively to the Reactive Black 5, respectively 433.03 mg/g and 464.52 mg/g and 532.14 mg/g. The impact of the deacetylation degree on pHZPC (zero point of charge) of the sorbent was also examined. Along with the increase in the deacetylation degree the value of chitosan pHZPC increased as well and at DD=75% DD=85% and DD=90%, pHZPC amounted respectively 7.6, 7.7 and 7.8.
    Źródło:
    Progress on Chemistry and Application of Chitin and its Derivatives; 2016, 21; 83-92
    1896-5644
    Pojawia się w:
    Progress on Chemistry and Application of Chitin and its Derivatives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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