• Natural Product Sciences
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• 제12권2호
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• pp.101-103
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• 2006

In the course of the continual work on the fresh tubers of Gastrodia elata, a fructoside constituent was isolated from the n-butanol soluble fraction prepared from the methanol extract. The structure of this compound was identified as $n-butyl-{\beta}-D-fructopyranoside$ from various spectroscopic data including $^1H-\;and\;^{13}C-NMR$, HMQC, HMBC, and FABMS.

• Nutrition Research and Practice
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• 제2권1호
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• pp.46-49
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• 2008

Anthocyanin pigments from varieties of black, red and wild rice were identified and quantified to evaluate their potential as nutritional function, natural colorants or functional food ingredients. Anthocyanin extraction was conducted with acidified methanol with 0.1M HCl (85:15, v/v) and identification of anthocyanin, aglycone and sugar moieties was conducted by comparison with purified standards by HPLC, Ultraviolet-Visible absorption spectrophotometer and paper chromatography. Black and wild rice showed three different types of pigments by HPLC whereas red rice variety did not show any anthocyanins. Out of three pigments detected, one (peak 2) was characterized as cyanidin-3-glucoside (C3G) by comparison of spectroscopic and chromatographic properties with an authentic standard, and another (peak 3) was tentatively identified as cyanidin-fructoside on the basis of spectroscopic properties with ${\lambda}_{max}$ of aglycone in 1% HCl methanol at 537 nm, electrospray ionization mass spectra with major ions at 449 and 287 m/z and chromatographic properties. But another pigment (peak 1) has not been characterized. The most abundant anthocyanin in black and wild rice was C3G.

• KSBB Journal
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• 제8권4호
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• pp.320-327
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• 1993

스티렌/아크렬 라텍스 폴리머를 폴리에릴렌이민으 로 표면처 리하여 얻은 PEI-microspheres는 그 표면 화학적 특성이 효소의 고정화에 적합하여 배당체의 합성반응에 서 필요로 하는 alginate-enclosed micro­s spheres biocatalyst를 제조할 수 있었고 라텍스 폴리머 표변에 형성된 폴리에틸렌이민 피막은 효소 부근에 친수성 분위기를 유지하여 높은 효소활성을 나 타내었을 뿐만 아니라, 생성된 배당체가 효소에 접 근하여 가수분해되는 반응을 억제하여 배당체의 수 율과 농도를 크게 증가시 켰으므로 alginate-en closed microspheres에 의한 배당체의 합성반응이 연속생산공정으로 연구개발 될 수 있다.