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    Wyświetlanie 1-3 z 3
    Tytuł:
    Starch transformations during freezing and refrigerating storage of hot dog rolls packaged in modified atmosphere
    Autorzy:
    Kwaśniewska-Karolak, I.
    Mostowski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/410438.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Łódzka. Wydawnictwo Politechniki Łódzkiej
    Tematy:
    starch retrogradation
    storage
    hot dog rolls
    freezing
    refrigeration
    modified atmosphere packaging (MAP)
    retrogradacja skrobi
    przechowywanie
    bułki do hot dogów
    zamrażanie
    chłodnictwo
    pakowanie w atmosferze modyfikowanej
    Opis:
    Wheat hot dogs are an attractive food product, consumed throughout the world. As bakery products, they are subject to staling proces and associated quality decrease, which limit their shelf life. One of the methods designed for bakery products durability prolongation are cooling and freezing processes in combination with the packaging system under modified atmosphere with a high concentration of carbon dioxide. Hence the aim of the study was to assess the rate of retrogradation process and starch structure changes in hot dog rolls packed by modified atmosphere system (MAP) during storage under refrigerated (1°C) and freezing (-18°C) conditions. Changes in moisture content, sensory, crumb hardness via TPA method and basic chemical composition of hot dog roll i.e. protein and lipids were analysed. Starch retrogradation processes were investigated by calorimetric method and spectrophotometrically. Comparative analysis of hot dog rolls storage variants indicated that the lower storage temperature is, the higher the level of maintenance of textural and sensory properties of the product. It has been shown that freezing hot dog rolls storage temperatures limited an increase in resistant starch content. In case of hot dogs storage under deep freeze conditions (-18°C), growth of RS was lowered by 46% compared to the refrigerated conditions. There was a significant increase in rolls hardness, whereby it was almost three times higher when hot dogs were refrigerated. It has been demonstrated that use of deep-freezing in combination with MAP significantly reduces the adverse effects caused by aging processes in hot dog rolls, especially RS formation.
    Źródło:
    Biotechnology and Food Science; 2018, 82, 2; 85-96
    2084-0136
    2299-6818
    Pojawia się w:
    Biotechnology and Food Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of different drying processes on an antioxidant potential of three species of the Lamiaceae family
    Autorzy:
    Kwaśniewska-Karolak, I.
    Mostowski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/2049315.pdf
    Data publikacji:
    2021
    Wydawca:
    Instytut Włókien Naturalnych i Roślin Zielarskich
    Tematy:
    drying process
    herb
    thyme
    Thymus vulgaris
    sage
    Salvia officinalis
    rosemary
    Rosmarinus officinalis
    antioxidant potential
    Lamiaceae
    spice plant
    ascorbic acid
    suszenie
    zioła
    działanie antyoksydacyjne
    kwas askorbinowy
    chlorofil
    Opis:
    Introduction: Spice plants are a rich source of biologically active compounds. Processes of drying, limits the development of microorganisms and biochemical reactions in raw herbs, at the same time modifies their chemical composition. Objective: The aim of this work was to evaluate the effect of drying process of selected plants on their antioxidant potential and the content of biologically active compounds. Methods: The herbal materials thyme herb (Thymus vulgaris L.), sage leaves (Salvia officinalis L.) and rosemary leaves (Rosmarinus officinalis) were dried using two methods: convective (at 30° C), and freeze-drying. In both, fresh and subjected to drying processes herbs, changes in total polyphenol and antioxidant potential (with the DPPH radical), vitamin C (in the form of ascorbic acid) and chlorophyll pigments contents, were studied. Results: The highest content of polyphenols and vitamin C was recorded in rosemary, while sage was characterized by the highest content of chlorophylls. It was found that the drying processes caused large losses of vitamin C (ascorbic acid) and dyes in comparison to the fresh material. The highest losses of vitamin C occurred in convection dried sage (95%), while most was preserved in lyophilised thyme (losses 74%). Drying had also influenced the reduction of the content of chlorophylls with the largest loss of these compounds, at 94% observed in the freeze-dried rosemary. However, the content of polyphenols increased, underscoring a large impact on the antioxidant activity of herbs. Conclusions: Drying processes resulted in the release of phenolic compounds, so their content increased three to four times in the case of rosemary and sage. The largest increase was observed in the case of lyophilised thyme. Simultaneously, the antioxidant potential was significantly increased. Herbal droughts proved to be a rich source of antioxidant compounds with promising applications as a food additive.
    Źródło:
    Herba Polonica; 2021, 67, 1; 8-17
    0018-0599
    Pojawia się w:
    Herba Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Phonon Effects on the Weak Measurement of Charge States in Quantum Dots with a Quantum Point Contact
    Autorzy:
    Marcinowski, Ł.
    Krzyżosiak, M.
    Machnikowski, P.
    Buczko, R.
    Mostowski, J.
    Roszak, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/2048072.pdf
    Data publikacji:
    2011-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    73.63.Kv
    03.65.Ta
    63.20.kd
    Opis:
    We study theoretically the process of a weak measurement of charge states in a double quantum dot performed by coupling to a quantum point contact. We focus on the interplay of the measurement process with phonon-induced dephasing of delocalized superpositions of electron states and compare the time scales relevant for the dynamics of the open system and for the measurement process: the decoherence rate, the localization rate of the state conditioned on the measurement outcome and the time scale on which information on the system state is gained in the process of the measurement.
    Źródło:
    Acta Physica Polonica A; 2011, 119, 5; 640-643
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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