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    Tytuł:
    Kleje wykorzystywane w produkcji opakowań żywności i zabawek – aspekty prawne i bezpieczeństwo
    Adhesives used in the production of food packaging and toys : legal aspects and safety
    Autorzy:
    Włodarska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/128494.pdf
    Data publikacji:
    2017
    Wydawca:
    Centralny Ośrodek Badawczo-Rozwojowy Przemysłu Poligraficznego
    Tematy:
    kleje
    produkcja opakowań
    opakowania zabawek
    opakowania żywności
    bezpieczństwo
    normalizacja
    adhesives
    packagings production
    toys packaging
    food packaging
    safety
    normalization
    Opis:
    Migration of hazardous substances from the packaging and materials in contact with the food and direct contact with the children is an important issue nowadays. It is well know that chemical compounds such as adhesives from packaging and toys can migrate, but question how much migration occurs and what potential health effects it may cause is gaining more attention from researchers. We know that migrating substances can be harmful to health, moreover in case of food they can also change its sensory characteristics. Packaged food is very convenient, but unfortunately since most foods are packaged an increasing number of people are likely to be exposed. Second very important topic in the context of safety are toys for children. Toys contribute to the development of a child however they must be safe for children and ensuring that they do not put children at any risk is a priority. The EU legislation is designed to ensure that toys comply with safety requirements, which are among the strictest in the world, especially in relation to the presence of chemicals. Currently, work is underway in Research & Development Centre for the Graphic Arts aimed at developing adhesive formulations safe for food use and production of toys that meet standards and regulations in this regard.
    Źródło:
    Acta Poligraphica; 2017, 9; 29-40
    2299-9981
    Pojawia się w:
    Acta Poligraphica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Influence of Microwave Drying Parameters on the Properties of Synthetic Moulding Sands
    Autorzy:
    Nowak, D.
    Gal, B.
    Włodarska, A.
    Granat, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/381434.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technologies
    drying
    moulding sand
    strength properties
    permeability
    innowacyjne technologie odlewnicze
    suszenie mikrofalowe
    piasek formierski
    właściwości wytrzymałościowe
    przepuszczalność
    Opis:
    In this work, the influence of microwave drying parameters such as irradiation time and microwave power level on the properties of synthetic moulding sands is presented. Determination of compressive strength Rcs, shear strength Rts and permeability Ps of synthetic moulding sands with the addition of two different bentonites, after drying process with variable microwave parameters were made. The research works were carried out using the microwave oven with regulated power range of the electromagnetic field. From the results obtained, the significant influence of both drying time and microwave power level on the selected properties of moulding sands was observed. In comparison to the conventional drying method, microwave drying allows to obtain higher compressive strength of the synthetic moulding sand. The influence of application microwave irradiation on permeability was not observed. Higher strength characteristics and shorter drying time are major advantages of application of the electromagnetic irradiation for drying of the synthetic moulding sand with regard to conventional drying method.
    Źródło:
    Archives of Foundry Engineering; 2019, 4; 51-54
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Benthic Crustacea and Mollusca distribution in Arctic fjord - case study of patterns in Hornsund, Svalbard
    Autorzy:
    Drewnik, A.
    Weslawski, J.M.
    Wlodarska-Kowalczuk, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/48672.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    species distribution
    benthos
    Mollusca
    Crustacea
    distribution
    Arctic fjord
    environmental factor
    benthic species
    bottom water
    water temperature
    Hornsund Region
    Svalbard
    Opis:
    We present the results of species distribution modeling conducted on macrobenthic occurrence data collected between 2002 and 2014 in Arctic fjord – Hornsund. We focus on species from Mollusca and Crustacea taxa. This study investigates the importance of individual environmental factors for benthic species distribution, with a special emphasis on bottom water temperature. It aims to verify the hypothesis that the distribution of species is controlled by low water temperatures in the fjord and that the inner basins of the fjord serve as potential refugia for Arctic species threatened by the climate change-related intensification of warmer water inflows. Our results confirm the importance of bottom water temperature in regulating the presence of benthic fauna in the Hornsund fjord. The distribution of studied species is clearly related to specific water mass – colder (<1°C) or warmer (>1°C); and the preferred temperature regimes seem to be species specific and unrelated to analyzed groups. This study supports the notion that inner basins of the Hornsund fjord are potential refugia for cold water Arctic fauna, while the outer and central basins provide suitable habitats for fauna that prefer warmer waters.
    Źródło:
    Oceanologia; 2017, 59, 4
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    In vitro propagation of Rhododendron tomentosum - an endangered essential oil bearing plant from peatland
    Autorzy:
    Jesionek, A.
    Kokotkiewicz, A.
    Wlodarska, P.
    Filipowicz, N.
    Bogdan, A.
    Ochocka, R.
    Szreniawa-Sztajnert, A.
    Zabiegala, B.
    Bucinski, A.
    Luczkiewicz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/19782.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    Rhododendron tomentosum Harmaja (formerly Ledum palustre L.) is a medicinal peat bog plant native to northern Europe, Asia and North America. This plant has a distinctive aroma thanks to the presence of essential oil, to which it also owes its anti-inflammatory, analgesic, antimicrobial and insecticidal properties. However, in Europe R. tomentosum is classified as an endangered species, mainly due to degradation of peatlands. In the present work, the micropropagation protocol for R. tomentosum was established for the first time, providing both an ex situ conservation tool and a means of continuous production of in vivo and in vitro plant material for further studies. R. tomentosum microshoots were initiated from leaf explants and further multiplied using Schenk- Hildebrandt (SH) medium supplemented with 9.84 μM 2iP and 1.00 μM TDZ. The shoots were elongated on the SH medium supplemented with 24.6 μM 2iP and subsequently rooted using the perlite substrate saturated with half-strength Woody Plant medium supplemented with 1.0% sucrose and 4.92 μM IBA. The regenerated plants were hardened on the phytohormone-free SH medium and acclimatized using 3:1:1 deacidified peat:perlite:gravel substrate. The identity of the mother plant was confirmed at morphological and molecular levels and Random Amplified Polymorphic DNA (RAPD) method was implemented to assess the genetic fidelity of the regenerants. The essential oil content of the maternal plant, in vitro shoots and the regenerants was determined by steamdistillation, and the obtained volatile fractions were analyzed by GC/MS.
    Źródło:
    Acta Biologica Cracoviensia. Series Botanica; 2016, 58, 2
    0001-5296
    Pojawia się w:
    Acta Biologica Cracoviensia. Series Botanica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Can seabirds modify carbon burial in fjords?
    Autorzy:
    Weslawski, J.M.
    Urbanski, J.
    Gluchowska, M.
    Grzelak, K.
    Kotwicki, L.
    Kwasniewski, S.
    Legezynska, J.
    Wiktor, J.
    Wlodarska-Kowalczuk, M.
    Zaborska, A.
    Zajaczkowski, M.
    Stempniewicz, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/47719.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    sea bird
    sediment
    organic matter
    Kongsfjorden
    microplankton
    carbon source
    Svalbard Fjord
    Opis:
    Two high latitude fjords of Spitsbergen (Hornsund 77°N and Kongsfjorden 79°N) are regarded as being highly productive (70 g and 50 gC m−2 year−1) and having organic-rich sediments. Hornsund has more organic matter in its sediments (8%), nearly half of it of terrestrial origin, while most of that in Kongsfjorden (5%) comes from fresh, marine sources (microplankton). Analysis of the carbon sources in both fjords shows that a major difference is the much larger seabird population in Hornsund-dominated with over 100 thousands pairs of plankton feeding little auks in Hornsund versus 2 thousand pairs in Kongsfjorden, and marine food consumption estimated as 5573 tonnes of carbon in Hornsund, versus 3047 tonnes in Kongsfjorden during one month of chick feeding period. Seabird colonies supply rich ornithogenic tundra (595 tonnes of C, as against only 266 tonnes of C in the Kongsfjorden tundra). No much of the terrestrial carbon, flushed out or wind-blown to the fjord, is consumed on the seabed – a state of affairs that is reflected by the low metabolic activity of bacteria and benthos and the lower benthic biomass in Hornsund than in Kongsfjorden.
    Źródło:
    Oceanologia; 2017, 59, 4
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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