Fabrication and characterization of double-layer active intelligent film based on chitosan, polyvinyl alcohol, grape skin anthocyanin and selenium nanoparticle
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Polyvinyl Alcohol
Characterization
The distribution and combined forms of selenium in cos lettuce with adding selenium plant in field were studied It was found that cos lettuce could enrich selenium through the leaves of absorbing selenite and transform selenite into various organic selenium by mothballing Nucleic polysaccharide and protein combined selenium were main form the contents of combined selenium hold 33 4%,41 4%,21 6% in total Se All big biological molecular combined selenium hold 70% in total selenium
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A pot experiment was carried out to study the effects of applying Na 2SeO3 and selenium ore powders on the absorption and transformation of selenium in Cardamine violifolia. The results showed that the selenium content and accumulation were significantly increased after applied selenium,and the selenium accumulation of different parts was leaf stem root. Compared with two kinds of selenium,the effects of increasing selenium application rate was better with applying selenium ore powders than Na 2 SeO 3 when the dosage of selenium was low,and it was opposited when the dosage of selenium application rate was high. The trend of inorganic selenium into organic selenium ratio of leaf was improved with the applying of selenium ore powders than Na2SeO3. The selenium availability was raised by the proper application of selenium. The ligandexchangeable and residual selenium of soil was mainly increased by using of Na2SeO3 and selenium ore powders,respectively.
Absorption rate
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Yolk
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Studied the combined forms,contribution and corresponding content of selenium in Selenium-enriched rice by using atomic fluorescence spectrometer.In the study,the linear calibrating curve for selenium was within the range of 4 μg/L-20 μg/L,whose correlative coefficient was 0.999 3,the RSD for total selenium was 0.966 %(n=6),the recovery rate of standard spiking for selenium was 103.12 %.The total selenium content was 206.708 μg/kg,which reached rich selenium standard of 60 μg/kg-300 μg/kg,and organic selenium was the main form storing in the rice,which content was 168.875 μg/kg,accounted for 81.70 % of total selenium,the selenium in protein was the main organic selenium form,whose content was 90.170 μg/kg,accounted for 53.40 %,secondly polysaccharide combined selenium accounted for 9.28 %,RNA combined selenium accounted for 1.86 %,and the other forms of organic selenium accounted for 35.46 %.
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Na2SeO3 was added to two kinds of Spirulina, S. maxima and S. platensis. On the fifth and sixth days after inoculation, the cumulating concentration of Selenium reached 600, 800 and 1000mg/L respectively. S. maxima containing organic selenium 474.37, 562.93, 645.98μg/g (DW) and S. platensis containing organic selenium 352.68, 501.85, 1198.15μg/g (DW) were obtained. The inorganic selenium, organic selenium and total selenium in both the Spirulina and the culture were assayed respectively. It was also studied in this paper the distribution of selenium after the absorption and metabolization of Spirulina.
Spirulina (dietary supplement)
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Spirulina (dietary supplement)
Selenium deficiency
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Se-enriched soybean was prepared by foliar fertilization . the thesis focuses on the analysis of the distribution of selenium in soybean under different concentration of sodium selenite , which contains the contents of the total selenium, inorganic selenium, organic selenium and selenocystine. The results of expe riments show that the total Se contents in soybean increased as the application of sodium selenite concentration increased. In soybean grain, selenium mainly existed in the form o f organic selenium, covering 84%-91% of the total selenium contents, while inorganic selenium makes up a smaller proportion, from 8.9% to 16%. The selenium from SeCys2 was approximately 7-10% of the total Se present in the selenized soybean.
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Genetic algorithm
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Two trials were conducted (one at Michigan State University and a second at South Dakota State University) involving supplementation of naturally high selenium swine diets (0.24 to 0.45 ppm) with 0.1 ppm of selenium from sodium selenite. In one trial, a low selenium diet (0.04 ppm) was supplemented with 0.40 ppm of selenium from sodium selenite to supply total selenium levels comparable to a naturally high selenium diet. Sodium selenite additions to the naturally high selenium diets did not significantly increase longissimus muscle or kidney selenium concentrations and increased liver selenium concentrations only slightly. Tissue selenium levels resulting from adding 0.40 ppm of selenium from sodium selenite to a naturally low selenium diet (0.04 ppm) were significantly lower than when a naturally high selenium diet (0.44 ppm) was fed. It appears that the dietary level of naturally-occurring organic selenium compounds is much more significant in influencing the tissue selenium concentration of the pig than supplemental selenium from sodium selenite.
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