22 research outputs found

    NIR Analysis of Rice Bran Depending on DifferentPercentages of Rice Polishing

    No full text
    Generally, in the case of agricultural products, some difficulties, resulting from the broad peak intensity and extensive overlapping of NIR absorption bands derived from complex chemical components that exist in the sample, arise in relation to specific functionalities of those spectra. This study is intended to specify the NIR spectra of rice bran depending on different percentages of rice polishing. Sample sets were prepared by polishing and grinding away 5% increments of the original mass of grains to leave 95%―45% of the kernels in successive sets. These samples showed a stepwise increase or decrease of localized chemical constituents: moisture, protein, carbohydrates, etc. Using this approach on a rice bran sample set, basic vibrational information was elucidated for the assignment of absorption bands of rice bran.ICMR200

    NIR Analysis of Rice Bran Depending on DifferentPercentages of Rice Polishing

    No full text
    Generally, in the case of agricultural products, some difficulties, resulting from the broad peak intensity and extensive overlapping of NIR absorption bands derived from complex chemical components that exist in the sample, arise in relation to specific functionalities of those spectra. This study is intended to specify the NIR spectra of rice bran depending on different percentages of rice polishing. Sample sets were prepared by polishing and grinding away 5% increments of the original mass of grains to leave 95%―45% of the kernels in successive sets. These samples showed a stepwise increase or decrease of localized chemical constituents: moisture, protein, carbohydrates, etc. Using this approach on a rice bran sample set, basic vibrational information was elucidated for the assignment of absorption bands of rice bran.ICMR200

    Antimicrobial constituents of peel and seeds of camu-camu (<i>Myrciaria dubia</i>)

    No full text
    AbstractVarious antimicrobial constituents of camu-camu fruit were isolated. Acylphloroglucinol (compound 1) and rhodomyrtone (compound 2) were isolated from the peel of camu-camu (Myrciaria dubia) fruit, while two other acylphloroglucinols (compounds 3 and 4) were obtained from camu-camu seeds. The structures of the isolated compounds were characterized by spectrophotometric methods. Compounds 1 and 4 were confirmed to be new acylphloroglucinols with different substituents at the C7 or C9 position of 2, and were named myrciarone A and B, respectively. Compound 3 was determined to be isomyrtucommulone B. This is the first report of the isolation of 3 from a natural resource. The antimicrobial activities of compounds 1, 3, and 4 were similar to those of 2, and the minimum inhibitory concentrations were either similar to or lower than that of kanamycin. These results suggest that the peel and seeds of camu-camu fruit could be utilized for therapeutic applications.</jats:p
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