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Wyświetlanie 1-3 z 3
Tytuł:
Salicylic acid release from chitosan pellets coated with polylactide
Autorzy:
Mucha, Maria
Balcerzak, Jacek
Filipiak, Adam
Powiązania:
https://bibliotekanauki.pl/articles/1035411.pdf
Data publikacji:
2011
Wydawca:
Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:
chitosan
first order kinetics
polylactide
prolonged drug release
salicylic acid
Opis:
The aim of the study was to prepare a bi-polymer drug carrier composed of chitosan pellets (CS) coated with polylactide shell (PLA) providing prolonged model drug – salicylic acid (SA) release into phosphate buffer of pH = 7.2. Pellets were obtained through a coacervation followed by a freeze-drying process. In a terms of model drug loading, porous pellets were impregnated with a SA solution under vacuum. Afterwards, loaded and dried beads were coated with PLA films through their dipping in a PLA organic solution. FTIR spectroscopy was implemented to analyse the efectiveness of SA loading process. The UV-Vis spectrophotometry kinetic studies of a model drug release from PLA coated and non-coated pellets into phosphate buffer were conducted. Increasing time of CS pellets impregnation with SA solution resulted in decrease of salicylic acid release rate.This tendency was more evident for the SA release from pellets coated with an additional layer of PLA. Model drug release kinetic points were well approximated with first order kinetics model.
Źródło:
Progress on Chemistry and Application of Chitin and its Derivatives; 2011, 16; 79-88
1896-5644
Pojawia się w:
Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena pobrania z dietą wybranych składników mineralnych przez młodzież w wieku 13-15 lat w zależności od płci oraz miejsca zamieszkania
Autorzy:
Florkiewicz, Adam
Grzych-Tuleja, Elżbieta
Cieślik, Ewa
Topolska, Kinga
Filipiak-Florkiewicz, Agnieszka
Leszczyńska, Teresa
Kopeć, Aneta
Powiązania:
https://bibliotekanauki.pl/articles/635280.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Tematy:
młodzież gimnazjalna, pokrycie zapotrzebowania, składniki mineralne
Opis:
Absorption of minerals compound by the investigated population aged 13-15 depending on gender and place of residenceIntroduction.The life period between 11-19 years of age is defined as the adolescence (phase), which is a period of intense growth and development, during which the organism ultimately heads for achieving a biological, psychological and social maturity. During this period, proper nutrition is an essential factor in the harmonious development of the young organism and to achieve a high health potential.The aim.The aim of this study was to evaluate the absorption of minerals compound by the investigated population depending on gender and place of residence.Material and methods.The evaluation was performed by 24 hours diet recall in randomly selected schools in Krakow and Skawina area. The content of mineral compounds (Na, K, Ca, P, Mg, Fe, Zn, Cu) consumed by the subjects was assessed by the use of the "Dieta 2.0" software.Results. It were discovered a numerous irregularities in consumption of selected minerals, including significant calcium deficiency, and also the excess of sodium in the diet. Calcium deficiency combined the excess of phosphorus can adversely affect the achievement of the peak bone mass and increase the risk of osteoporosis in later stages of life. Also demonstrated high sodium and low potassium intakes could contribute to the development of cardiovascular disease.
Źródło:
Zdrowie Publiczne i Zarządzanie; 2013, 11, 3
2084-2627
Pojawia się w:
Zdrowie Publiczne i Zarządzanie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The pre-Taghanic (Givetian, Middle Devonian) ecosystems of Miłoszów (Holy Cross Mts, Poland)
Autorzy:
Halamski, Adam T.
Baliński, Andrzej
Racki, Grzegorz
Amler, Michael R. W.
Basse, Martin
Denayer, Julien
Dubicka, Zofia
Filipiak, Paweł
Kondas, Marcelina
Krawczyński, Wojciech
Mieszkowski, Radosław
Narkiewicz, Katarzyna
Olempska, Ewa
Wrzołek, Tomasz
Wyse Jacson, Patrick N.
Zapalski, Mikołaj K.
Zatoń, Michał
Kozłowski, Wojciech
Powiązania:
https://bibliotekanauki.pl/articles/2171821.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
stratigraphy
palaeoecology
biota
biodiversity
mesophotic
deeper shelf
climate
carbonate
Opis:
The middle and upper parts of the Skały Fm, Early to Middle Givetian in age, were investigated in four sections at Miłoszów Wood in the Łysogóry Region (northern region of the Holy Cross Mountains, central Poland). The dating is based on conodonts (Polygnathus timorensis Zone to the later part of the Polygnathus varcus/Polygnathus rhenanus Zone; early Polygnathus ansatus Zone cannot be excluded) and spores (Ex1–2 subzones) and, coupled with cartographic analysis and geophysical investigation, allows correlation within the strongly faulted succession. Significant lateral facies variations within the carbonate ramp depositional system in comparison with the better studied Grzegorzowice–Skały section, about 3 km distant, are documented, thanks to conodont-based correlation of both successions. Foraminifers, fungi, sponges, rugose and tabulate corals, medusozoans, microconchids and cornulitids, polychaetes (scolecodonts), molluscs (bivalves, rostroconchs, and gastropods), arthropods (trilobites and ostracods), bryozoans, hederelloids, ascodictyids, brachiopods, echinoderms (mostly crinoids, rare echinoids, holuthurians, and ophiocistoids), conodonts, fish, plants (prasinophytes, chlorophycophytes, and land plant spores), and acritarchs are present. Brachiopods are the most diverse phylum present (68 species), other richly represented groups are bryozoans and echinoderms; in contrast, cephalopods and trilobites are low in diversity and abundance. The muddy, middle to outer ramp biota (200 marine taxa, including 170 species of marine animals, 22 photoautotrophs, 6 forams) represents a mixture of allochthonous shallower-water communities (upper BA3), including storm- and possibly tsunami-affected coral mounds, and autochthonous deep-water soft-bottom brachiopod (e.g., Bifida–Echinocoelia) communities (BA 4–5). The richness and diversity of the Miłoszów biota is relatively high, comparable with other approximately coeval pre-Taghanic ecosystems during the Devonian climatic deterioration (cooling). Preliminary data indicate that in the Holy Cross Mountains, no large-scale replacement of brachiopod (and probably many other benthic ones, like crinoids) communities took place between the Early–Middle Givetian and the Early Frasnian, in contrast to the demise of the Hamilton/Upper Tully fauna in the Appalachian Basin. Such a similarity of pre- and post-Taghanic faunas does not exclude the occurrence of environmental perturbations and transient community turnovers, caused by immigrations during the Taghanic Biocrisis, but evidences the successful recovery of the indigenous biota.
Źródło:
Annales Societatis Geologorum Poloniae; 2022, 92, 4; 323--379
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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