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    Wyświetlanie 1-2 z 2
    Tytuł:
    Bromatological, analytical and chemometric assessment of animal and plant foods based on mineral composition
    Autorzy:
    Szefer, Piotr
    Grembecka, Małgorzata
    Powiązania:
    https://bibliotekanauki.pl/articles/2203256.pdf
    Data publikacji:
    2022-05-31
    Wydawca:
    Gdański Uniwersytet Medyczny
    Tematy:
    Assessment of food quality
    Analytics
    Chemometrics
    Bromatology
    Opis:
    There are several examples of numerous applications of analytical and multivariate techniques useful in investigations of varied assortment of food products. The successful use of chemometrics in study of food such as meat and its products, fish, seafood, milk and dairy products, honey, cereal products, oils, oilseeds and nuts, vegetables, fruits, mushrooms, tea, coffee, confectionary products, mineral waters and alcoholic beverages deserves attention. RDA indicated exceeded its normative values for Se, Cu, Mn, Fe and Cr in some groups of animal food and Cr, Mn, P and Fe in some assortment of plant food. Based on PTWI values for Pb, Cd and Hg, there is no threat to human health resulting from the consumption of the investigated food products. It is concluded that the proper use of analytical and chemometric tools is useful for assessing nutritive and health quality of animal and plant foods. They play an important role in quality control, and their classification in view of geographical origin, confection and degree of environmental pollution. Both, instrumental and multivariate techniques would be useable in differentiating unprocessed and technologically processed food as well as detecting fraud to preserve the brand name of the original product. The aim of this study is to give an overview of the crucial issues associated with the implementation of chemometrics in food research and development.
    Źródło:
    European Journal of Translational and Clinical Medicine; 2022, 5, 1; 77-106
    2657-3148
    2657-3156
    Pojawia się w:
    European Journal of Translational and Clinical Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mikroplastik : źródła, techniki separacji i indywiduacji
    Microplastic : sources, separation and identification techniques
    Autorzy:
    Trzebiatowska, Patrycja Jutrzenka
    Kadac-Czapska, Kornelia
    Grembecka, Małgorzata
    Powiązania:
    https://bibliotekanauki.pl/articles/27310027.pdf
    Data publikacji:
    2023
    Wydawca:
    Polskie Towarzystwo Chemiczne
    Tematy:
    mikroplastik
    tworzywa sztuczne
    identyfikacja mikroplastiku
    microplastic
    plastics
    microplastics identification
    Opis:
    The worldwide extensive consumption of plastic materials, due to the low cost of production and their versatility, causes plastic pollution of the environment. It is one of the most difficult and challenging problems on the Earth, affecting the oceans, land, atmosphere and living matter. An emerging aspect is a microplastic pollution, which has become an intensively researched topic among scientists and organizations. Microplastics (MPs) according to the definition are granules, fibers, and fragments of micropollutants of the upper limit of the contractual size is 5 mm. They can have a primary or secondary origin. Primary microplastics are microscopic granules, or pellets purposedly produced for industrial applications. Secondary microplastics are usually generated by the fragmentation and degradation of plastic waste in the environment (e.g. mechanical abrasion, UV radiation, temperature changes, and biodegradation) or during the use of plastic consumption (Figure 2). Microplastics can impact ecosystems by providing water, delivery and air, and further affect human health by inhaling airborne particles or providing contaminated water and food. There can be identified three major harmful aspects of plastics and microplastics. Firstly, plastics exposed to environmental weathering can undergo degradation and break down from macro to smaller particles. MPs may be transported across the globe, as there were found in the Arctic snow or oceans deep. Second, MPs may adsorb and carry toxic chemical substances (persistent organic pollutants) which are harmful to humans and animals. And last but not least, plastics get to the food chain and air and reach humans through various routes. Many works in the literature describe the procedure of sampling, handling, identifying and quantifying MPs from different environments. Before to the actual analysis, MPs samples are often first fractionated by sieving, and solutions of various densities are also used to separate potential microplastics from other contaminants. Subsequently, the samples are purified in etching media to remove any organic contaminants. The MP identification and characterization procedure is a five-step process. It concerns the analysis of the size, shape, color and amount of plastic particles (expressed as the number or mass of particles per volume or mass of the sample) usually done by microscopy. The identification of the polymer is done by chemical characterization using usually spectroscopic (IR and Raman), chromatographic or thermal methods (Figure 4).
    Źródło:
    Wiadomości Chemiczne; 2023, 77, 3-4; 153--177
    0043-5104
    2300-0295
    Pojawia się w:
    Wiadomości Chemiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-2 z 2

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