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    Tytuł:
    Morphological and pharmacokinetic properties of oral solid dietary supplements containing plant extracts
    Właściwości morfologiczne i farmakokinetyczne stałych doustnych suplementów diety zawierających ekstrakty roślinne
    Autorzy:
    Glogowski, A.
    Marczynski, Z.
    Kolodziejczyk, M.K.
    Jambor, J.
    Stefan, M.K.
    Zgoda, M.M.
    Powiązania:
    https://bibliotekanauki.pl/articles/71271.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Włókien Naturalnych i Roślin Zielarskich
    Opis:
    Introduction: Dietary supplements are a good way to supplement the deficiency of certain micronutrients and organic components (therapeutic agents) in human body. They are most often available in concentrated form as tablets, capsules, powder or liquid. Objective: To investigate morphological parameters and the pharmaceutical availability of coated tablets – dietary supplements – that contain selected pharmacopeial titrated dry plant extracts. Methods: Testing of the effective time of the tablet surface erosion was performed in model acceptor fluids using pharmacopeial methods in static (Erweka apparatus) and dynamic (unlimited diffusion method) conditions. Furthermore, morphological parameters of tablets (the original shape of an ellipse) as well as their hardness were determined. Results: The effective erosion time was determined by conductometric method using carboxymethylcellulose sodium salt (NaCMC) contained in the tablet. The content of gum arabic and NaCMC in the tablet testifies that the granulate was produced using the “wet granulation” technique which resulted in high hardness of original, esthetic, elliptical tablets and in prolonged disintegration time (erosion). Conclusions: The used excipients: gum arabic and NaCMC for the production of the tested tablets containing selected dry plant extracts result in their high hardness. The tested dietary supplements are characterized by esthetic design, original shape, and prolonged disintegration time which affects the pharmaceutical availability.
    Wstęp: Suplementy diety to dobry sposób na uzupełnianie braków niektórych mikroelementów i składników organicznych (środków leczniczych) w organizmie człowieka. Najczęściej są oferowane w postaci skoncentrowanej jako tabletki, kapsułki proszek lub płyn. Cel: Celem pracy było zbadanie parametrów morfologicznych i dostępności farmaceutycznej tabletek powlekanych, suplementów diety, które zawierają wybrane farmakopealne mianowane suche ekstrakty roślinne. Metody: Metodami farmakopealnymi w modelowych płynach biorczych przeprowadzono badania nad efektywnym czasem erozji powierzchniowej tabletek w warunkach statycznych (urz. Erweka) i dynamicznych (metodą nieograniczonej dyfuzji). Ponadto oznaczono parametry morfologiczne tabletek (oryginalny kształt elipsy) i ich twardość. Wyniki: Wykorzystując zawartość w masie tabletkowej soli sodowej karboksymetylocelulozy (NaCMC), metodą konduktometryczną wyznaczono efektywny czas erozji. Zawartość w masie tabletkowej gumy arabskiej i NaCMC świadczy o tym, że granulat przygotowano metodą „na mokro”, co przekłada się na wysoką twardość oryginalnych, estetycznych tabletek o eliptycznym kształcie i wydłużony czas rozpadu (erozji). Wnioski: Zastosowane substancje pomocnicze – guma arabska i NaCMC (sól sodowa karboksymetylocelulozy) – do wytworzenia badanych tabletek, zawierających wybrane suche ekstrakty roślinne, powodują ich wysoką twardość. Przebadane wybrane suplementy diety charakteryzują się estetycznym wyglądem i oryginalnym kształtem oraz wydłużonym czasem rozpadu, co wpływa na dostępność farmaceutyczną.
    Źródło:
    Herba Polonica; 2016, 62, 3
    0018-0599
    Pojawia się w:
    Herba Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stages of the formation of the Łeba barrier-lagoon system on the basis of the geological cross-section near Rąbka (Southern Baltic Coast, Poland)
    Autorzy:
    Rotnicki, Karol
    Alexandrowicz, Stefan W.
    Pazdur, Anna
    Goslar, Tomasz
    Borówka, Ryszard K.
    Powiązania:
    https://bibliotekanauki.pl/articles/2026416.pdf
    Data publikacji:
    2009
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    sand barriers
    lagoons
    Holocene barrier- lagoon system
    Polska
    southern Baltic coast
    Opis:
    The ar ti cle pres ents the re sults of a de tailed study of the geo log i cal struc ture of the £eba Bar rier in the R¹bka crosssec tion (South ern Bal tic, Po land). The bar rier sep a rates Lake £ebsko from the Bal tic. Five sed i men tary com plexes were dis tin guished there (M2–M6). The spa tial vari abil ity of the grain-size dis tri bu tion was ex am ined and suc ces sion stages of the mol lusc fauna oc cur ring in the in di vid ual sed i men tary com plexes were dis tin guished. Ra dio car bon dating was used to es tab lish the age of the most im por tant events dur ing the pro cess of for ma tion of the bar rier, which took place in the course of sev eral rel a tive sea-level changes. The first sed i men tary com plex (M2) at R¹bka is connected with the sec ond ingression (i2) of the Bal tic Sea (ca. 6,700–6,000 14C years BP), sea-level sta bi li za tion (6,000–5,500 14C years BP), and at last sea-level low er ing (5,500–5,000 14C years BP) in the re gion of the Gardno-£eba Coastal Plain. The sed i men tary com plex M3 de vel oped in a la goonal en vi ron ment when the bar rier was sit u ated north of its pres ent po si tion (5,000–3,000 14C BP). The next low er ing of the sea-level made the la goon shal lower and caused the emer gence of small but al ready subaerial stretches of bar rier land with a fresh wa ter fauna in the north (4,880±40 14C BP). With the next ingression stage (i3), which took place be tween 4,500 and 3,000 BP, the bar rier shifted to its pres ent-day po si tion and the la goon changed into a fresh wa ter lake. From 3,000 to 1,700 14C BP fos sil soil and peats de vel oped on the bar rier sur face as a re sult of an other sea-level low er ing. The last ingression stages (i4 and i5), youn - ger than 1,700 BP, built up the bar rier, prac ti cally in its to day’s lo ca tion (sed i men tary com plexes M4 and M5). The youn gest sed i men tary com plex (M-6) is rep re sented by pres ent-day beach sands.
    Źródło:
    Studia Quaternaria; 2009, 26; 3-24
    1641-5558
    2300-0384
    Pojawia się w:
    Studia Quaternaria
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    In negative life contexts men report a lower desire to end relationship if their partners are high in borderline behavioural characteristics. A quasiexperimental research
    Autorzy:
    Burtaverde, Vlad
    Shackelford, Todd K.
    Ionescu, Ștefan-Cosmin
    Bumbănac, Maria
    Avram, Eugen
    Powiązania:
    https://bibliotekanauki.pl/articles/29433583.pdf
    Data publikacji:
    2022
    Wydawca:
    Uniwersytet Kardynała Stefana Wyszyńskiego w Warszawie
    Tematy:
    mating
    life history theory
    borderline personality
    evolutionary psychopathology
    Opis:
    We investigated the relationship between borderline symptoms in women and their partner’s desire to continue the relationship and relationship commitment in an aversive living environment using an experimental design. We aimed to highlight the adaptive mechanisms of borderline symptoms, which may materialize in reproductive advantages for women in aversive contexts. We conducted two experiments to test the same hypotheses. In Study 1, online participants were assigned to the experimental group (N = 123). The experimental scenario hypothesized having a relationship with a woman high in borderline characteristics, during an aversive life environment. The control group (N = 118) hypothesized having a relationship with a woman high in borderline characteristics, during normal living conditions. We repeated the same experimental manipulation using a within-subjects design in Study 2 (N = 171). Environmental conditions influenced the desire to end the relationship with women characterized by borderline symptoms; men had a lower desire to end the relationship with their partner in aversive life events than in normal living conditions. Thus, women’s borderline behavioral characteristics may bring mating benefits in aversive living environments.
    Źródło:
    Studia Psychologica; 2022, 22, 2; 5-16
    1642-2473
    Pojawia się w:
    Studia Psychologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessing the Indoor Pollutants Effect on Ornamental Plants Leaves by FT-IR Spectroscopy
    Autorzy:
    Husti, A.
    Cantor, M.
    Stefan, R.
    Miclean, M.
    Roman, M.
    Neacsu, I.
    Contiu, I.
    Magyari, K.
    Baia, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1398690.pdf
    Data publikacji:
    2016-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.14.-g
    87.15.B-
    87.64.km
    92.60.Sz
    Opis:
    Air pollution has become a mass phenomenon, a major and global problem of modern society, affecting billions of people and environment. People are exposed to various levels of pollutants not just in the outdoor environment, but also in indoors. The quality of life and well-being of employees can be increased by incorporating ornamental plants in the work environment. Among the great variety of plants species able to remove/reduce indoor air pollutants Dracaena deremensis, Sansevieria trifasciata and Ficus elastica were hereby investigated. Their ability to remove chemical pollutants was evaluated in real-life conditions and the changes induced by the environmental stress on the structure and biochemical composition of the plants leaves were evidenced by the Fourier transform infrared spectroscopy. The most pronounced concentration decrease was noticed for the CO₂ (58.33% removed concentration), whereas the mean value of the removed concentration of other chemical pollutants was of ≈ 25%. The Fourier transform infrared spectra analysis revealed that, although the plants are subjected to the chemical pollutants action, they maintain the structure by adjusting their metabolism. A decrease in the overall protein contribution in the amide bands and an increase of the bands assigned to polysaccharide vibrations, illustrate the consequences of the pollution action. Moreover, the chlorophyll presence is evidenced in the IR spectra of all samples by the bands around 1040, 1445, 1620, and 1735 cm^{-1}. The results show that the Fourier transform infrared spectra are an important source of information for the rapid characterization of the chemical structure of the biological systems under environmental stress.
    Źródło:
    Acta Physica Polonica A; 2016, 129, 1; 142-149
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of air quality on sleep and cognitive performance in school children aged 10–12 years: a double-blinded, placebo-controlled, crossover trial
    Autorzy:
    Klausen, Frida B.
    Amidi, Ali
    Kjærgaard, Søren K.
    Schlünssen, Vivi
    Ravn, Peter
    Østergaard, Kirsten
    Gutzke, Vibeke H.
    Glasius, Marianne
    Grønborg, Therese K.
    Hansen, Stefan N.
    Zachariae, Robert
    Wargocki, Pawel
    Sigsgaard, Torben
    Powiązania:
    https://bibliotekanauki.pl/articles/2203016.pdf
    Data publikacji:
    2023-05-23
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    sleep quality
    cognition
    indoor air
    CO2 exposure
    school children
    RCT study
    Opis:
    Objectives To investigate the effect of CO₂ during sleep on next-morning cognitive performance in young schoolchildren, the authors performed a double-blind fully balanced crossover placebo-controlled study. Material and Methods The authors included 36 children aged 10–12 years in the climate chamber. The children slept at 21°C in 6 groups each at 3 different conditions separated by 7 days in a random order. Conditions were as follows: high ventilation with CO₂ at 700 ppm, high ventilation with added pure CO₂ at 2000–3000 ppm, and reduced ventilation with CO₂ at 2–3000 ppm and bioeffluents. Children were subjected to a digital cognitive test battery (CANTAB) in the evening prior to sleep and on the next morning after breakfast. Sleep quality was monitored with wrist actigraphs. Results There were no significant exposure effects on cognitive performance. Sleep efficiency was significantly lower at high ventilation with CO₂ at 700 ppm which is considered to be a chance effect. No other effects were seen, and no relation between air quality during sleep and next-morning cognitive performance was observed in the children emitting an estimated 10 l CO₂ /h per child. Conclusions No effect of CO₂ during sleep was found on next day cognition. The children were awakened in the morning, and spent from 45–70 min in well-ventilated rooms before they were tested. Hence, it cannot be precluded that the children have benefitted from the good indoor air quality conditions before and during the testing period. The slightly better sleep efficiency during high CO₂ concentrations might be a chance finding. Hence, replication is needed in actual bedrooms controlling for other external factors before any generalizations can be made.
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2023, 36, 2; 177-191
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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