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    Wyświetlanie 1-4 z 4
    Tytuł:
    Compressive behaviour of wheat from confined uniaxial compression tests
    Autorzy:
    Zeng, C.
    Wang, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/2082573.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    wheat
    compression test
    elastic moduli
    compression
    index
    Opis:
    The present paper focuses on the compression characteristics of granular wheat stored in silos. The confined uniaxial compression tests of wheat were performed to investigate the compression behaviour of granular wheat. The effects of different loading paths and different maximum loading levels on the compression index and elastic moduli were analysed. The compression curves for each specimen were obtained from the test results. It was observed that nearly 80% of the total deformation occurred in the virgin loading stage. The compression index and elastic moduli were determined, which indicates that both the parameter compression index and elastic moduli correlate with the loading path.
    Źródło:
    International Agrophysics; 2019, 33, 3; 347-354
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stress-strain response of sheared wheat granular material stored in silos using triaxial compression tests
    Autorzy:
    Zeng, C.
    Gu, H.
    Wang, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/2082870.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    wheat granular
    void ratio
    confining pressure
    shearing velocity
    strength
    dilatancy
    Opis:
    Wheat granular material stored in silos usually suffers shearing loads, which induces complex stress-strain response during the silo filling and discharging process. In order to guarantee the safe storage of these granular materials, it is necessary to investigate the shearing behaviour of wheat granular material in silos. In this paper, a series of triaxial tests were conducted on wheat granular material by using a modified double cell triaxial system. The stress-strain responses including the volumetric strain behaviour were examined considering the effect of the initial void ratio, confining pressure and shearing velocity. Different shearing states were discussed to obtain their strength parameters in various conditions. The results show that the shearing characteristics of wheat granular material are influenced by the shearing velocity. The friction angles increase with the decreasing void ratio at different states. The final volumetric strain decreases with increasing confining pressure, and the dilation is diminished. The dilatancy behaviour was quantitatively evaluated based on Row’s theory for wheat granular material. The stress-strain relationship of wheat granular material was then determined.
    Źródło:
    International Agrophysics; 2020, 34, 1; 103-114
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synergetic effect of microwave blanching and modified atmosphere packaging using laser micro-perforated bags on the storage quality of carrot
    Autorzy:
    Ezeanaka, M.C.
    Zhang, M.
    Wang, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/2083077.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    laser micro-perforated bag
    modified atmosphere
    packaging
    blanching
    carrot
    storage quality
    Opis:
    The present study was undertaken to determine the combined effffect of microwave blanching and micro-perforated modifified atmosphere packaging in maximizing shelf life on the basis of quality attributes which were evaluated during storage. The carrots were blanched in water using a microwave at 360 W and then stored in micro-perforated modifified atmosphere packaging. The results indicated that blanched carrots in micro-perforated modifified atmosphere packaging showed an improved storage quality. In particular, it was observed that the fifirmness of the pretreated samples in the micro-perforated package were signifificantly improved. The enzyme activity (peroxidase) initially increased and then decreased with longer storage times. There was also a greater reduction in water content in sample C8, probably due to a higher rate of evaporation through the perforations. Water mobility which comprises tightly bound water, loosely bound water, and immobilized water were observed in all samples, while the free water level was insignificant in pretreated micro-perforated samples. The free water, T24 peak was observed for the control sample which increased with increase in storage duration. Also, the effects of this preservation method on other quality parameters such as β-carotene, water activity, moisture content, and microbial load was limited. However, sample C8 was more effective in retaining quality. Overall, this study demonstrated that blanching carrot in micro-perforated MAP at C8 was the most useful technique in preserving the storage qualities of carrot.
    Źródło:
    International Agrophysics; 2021, 35, 2; 187-196
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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