کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5142139 | 1496026 | 2017 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Radiation-induced degradation of sodium alginate and its plant growth promotion effect
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی (عمومی)
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چکیده انگلیسی
Alginate was irradiated as a solid with 60Co gamma rays in the dose range of 20-100Â kGy to investigate the effect of radiation on alginates. One of the principle factors for reducing the cost is achieving the degradation at low irradiation doses which occurs with addition of chemical initiator to NaAlg during irradiation process that leads to a synergistic effect, which remarkably increases the degradation efficiency of alginate. The factors affecting the degradation process such as irradiation dose and potassium per-sulfate (KPS) addition were studied. The average molecular weight of the irradiated alginate was investigated in detail by using several complementary techniques such as chromatography and viscometry. The lowest molecular weight of alginate resulted at 100Â kGy and added KPS, whereas the highest one at 20Â kGy in absence of KPS. Characterization of the oligoalginates obtained by radiation degradation was performed by FT-IR and UV-vis spectroscopy, XRD and TGA. The effect of water-soluble radiation-induced alginate fractions on the growth promotion of Faba bean plant was studied. The highest plant growth and seed yield compared with control occurred for plants sprayed with low molecular weight NaAlg fractions (treated with 100Â kGy and added KPS).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Arabian Journal of Chemistry - Volume 10, Supplement 1, February 2017, Pages S431-S438
Journal: Arabian Journal of Chemistry - Volume 10, Supplement 1, February 2017, Pages S431-S438
نویسندگان
H.L. Abd El-Mohdy,