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    Wyświetlanie 1-3 z 3
    Tytuł:
    Estimation of antioxidant components of tomato using VIS-NIR reflectance data by handheld portable spectrometer
    Autorzy:
    Szuvandzsiev, P.
    Helyes, L.
    Lugasi, A.
    Szanto, C.
    Baranowski, P.
    Pek, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/25194.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    antioxidant component
    tomato
    Lycopersicon esculentum
    vegetable
    lycopene
    polyphenol
    spectrometer
    near infrared reflectance spectroscopy
    Opis:
    Processing tomato production represents an important part of the total production of processed vegetables in the world. The quality characteristics of processing tomato, important for the food industry, are soluble solids content and antioxidant content (such as lycopene and polyphenols) of the fruit. Analytical quantification of these components is destructive, time and labour consuming. That is why researchers try to develop a non-destructive and rapid method to assess those quality parameters. The present study reports the suitability of a portable handheld visible near infrared spectrometer to predict soluble solids, lycopene and polyphenol content of tomato fruit puree. Spectral ranges of 500-1000 nm were directly acquired on fruit puree of five different tomato varieties using a FieldSpec HandHeld 2™ Portable Spectroradiometer. Immediately after spectral measurement, each fruit sample was analysed to determine soluble solids, lycopene and polyphenol content. Partial least square regressions were carried out to create models of prediction between spectral data and the values obtained from the analytical results. The accuracy of the predictions was analysed according to the coefficient of determination value (R2), the root mean square error of calibration/cross-validation.
    Źródło:
    International Agrophysics; 2014, 28, 4
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New slow-release fertilizers - economic, legal and practical aspects: a Review
    Autorzy:
    Wesołowska, M.
    Rymarczyk, J.
    Góra, R.
    Baranowski, P.
    Sławiński, C.
    Klimczyk, M.
    Supryn, G.
    Schimmelpfennig, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/2083050.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    slow-release and controlled-release fertilizers
    national emission ceilings directive
    greenhouse gas emissions
    NH3 emisions
    Opis:
    The improper adjustment of the release characteristics of commonly used mineral fertilizers to the nutritional requirements of plants results in the loss of a significant part of them by infiltration into the soil profile or in the form of greenhouse gas emissions into the atmosphere. Legal regulations including the national emission ceilings directive, require the Member States of European Union to limit ammonia emissions from agriculture. In order to minimize the losses of valuable nutrients and to reduce greenhouse gas emissions it is necessary to find new solutions and technologies in agriculture. Specialists emphasize the beneficial effects of localized fertilization methods and the use of the slow-release/controlled-release fertilizers. Field studies conducted on newly obtained fertilizers prove their beneficial effect on the quality and quantity of the crop but currently the products offered on the market are too expensive to use in large acreage crops. This article presents an overview of some particular economic, legal and practical aspects of slow-release fertilizer production and use. Additionally, the results of field tests indicating their beneficial effect on plant yield, the plant response to stressful conditions and methods for environmental protection are also presented.
    Źródło:
    International Agrophysics; 2021, 35, 1; 11-24
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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