http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
게릴라아사메누 ( Gelila Asamenew ),김헌웅 ( Heon-woong Kim ),이민기 ( Min-ki Lee ),이선혜 ( Seon-hye Lee ),이수지 ( Suji Lee ),박진주 ( Jin Ju Park ),최용민 ( Yongmin Choi ),이상훈 ( Sang-hoon Lee ),김정봉 ( Jung-bong Kim ) 한국환경농학회 2019 한국환경농학회 학술대회집 Vol.2019 No.-
In the present study, 19 commercially popular green and roasted coffee bean samples, and the beans, leaves, cascaras, cherries, flower pods, and stems part of the coffee tree cultivated in Korea using greenhouse were analyzed for their hydroxycinammoyl derivatives, methyl xanthine, and polyphenolic contents by ultra-performance liquid chromatography coupled with diode array detector and quadrupole time-of-flight mass spectrometry. A total of 59 phenolic acids including nine methyl esters of mono-, di-caffeoylquinic acid, and feruloylquinic acid were identified. The methyl hydroxycinnamoyl quinates are reported for the first time from Coffea arabica and Coffea robusta. The total phenolic content ranged from 5628.3 ± 227.2 to 8581.7± 109.1 mg/100 g dry weight (DW) in green, and 790 ± 63.4 to 1890.6 ± 37.4 mg/100 g DW roasted beans. Significant levels of flavan-3-ols (catechin and epicatechin), flavonol glycosides and C-glucosyl-xanthones (mangiferin and isomangiferin) were detected in all coffee tree parts except beans. Anthocyanin (delphinidin 3,5-O-diglucoside) and proanthocyanidins (trimers and tetramers) were identified predominantly in the leaves, cherries and flower pods. From methyl xanthine class, higher level of caffeine was determined together with trigonelline and theobromine. The results suggested that considering the utilization of other parts of coffee tree apart from beans can provide a divers health benefiting polyphenolic compounds.
UPLC-DAD-QToF/MS를 이용한 야콘(Smallanthus sonchifolius) 괴근 내 페놀산 유도체 분석
이민기,김헌웅,이선혜,Gelila Asamenew,김영진,이수지,정현아,유선미,김정봉 한국식품영양과학회 2018 한국식품영양과학회지 Vol.47 No.12
The reported/proposed positive ion fragmentation of phenolic acid derivatives in yacon (Smallanthus sonchifolius) were summarized in the constructed LC-MS library for identification based on the literature. A total of fifteen phenolic acid derivatives (fourteen caffeoyl derivatives and one p-coumaroyl derivative) were separated and identified from the tuberous roots of yacon using UPLC-DAD-QToF/MS. Each caffeoyl derivative was conjugated with altraric acid, quinic acid, and octulosonic acid. The total content of each caffeoyl derivative was as follows: caffeoylaltraric acids (1,218.4 mg/100 g dry weight)> caffeoylquinic acids (331.5)> caffeoyloctulosonic acids (125.2). In particular, 2,3,5- or 2,4,5-tri-O-caffeoylaltraric acid (63% of the total phenolic acid derivatives) showed the highest contents followed by 5-O-caffeoylquinic acid (chlorogenic acid, 14%). Moreover, 2,3,5- or 2,4,5-tri-O-caffeoylaltraric acid methyl ester and 5-O-p-coumaroylquinic acid as new phenolic acid derivatives in yacon were identified putatively by the mass spectral data. This indicates that the individual phenolic acid derivatives in yacon might be determined easily using the constructed LC-MS library. Furthermore, it can provide valuable information for future studies on the health-promoting properties of yacon. 본 연구에서는 야콘에 보고된 페놀산 유도체의 라이브러리를 제작하고 이를 바탕으로 ToF/MS를 통해 검출된 양이온 질량 패턴을 비교하여 개별 페놀산 유도체의 조성 및 함량 정보를 제공하고자 하였다. 국내에서 재배된 괴근으로부터 caffeoyl 유도체(14종)와 coumaroyl acid 유도체(1종)를 분리・동정하였다. 개별 유도체는 caffeic acid와 altraric acid, quinic acid, octulosonic acid가 결합된 형태로 존재하였으며, 모분자로부터 제거된 caffeic acid의 단편 이온 패턴을 나타내었다. 각 유도체의 총 함량은 caffeoylaltraric acid 유도체 > caffeoylquinic acid 유도체 > caffeoyloctulosonic acid 유도체 순으로 높았다. 이 중 2,3,5- 또는 2,4, 5-tri-O-caffeoylaltraric acid 및 chlorogenic acid는 각각 총 함량의 약 63%, 14%로 괴근의 주요 성분이었다. 또한 이미 보고된 페놀산 유도체 이외에 2,3,5- 또는 2,4,5-tri- O-caffeoylaltraric acid methyl ester와 5-O-p-coumaroylquinic acid가 확인되었으며, 이는 야콘에서 보고된 적 없는 새로운 화합물이었다. 그러나 입체 배열에 따라 다양한 이성질체가 존재하는 caffeoylaltraric acid 유도체는 다양한 분석 기법을 통해 보다 정확한 동정이 필요할 것이다. 야콘 라이브러리에 수록된 페놀산 유도체 정보는 향후 정확한 구조 동정 및 함량 평가를 돕고 나아가 기능성 소재로서의 활용 가능성을 높일 수 있을 것으로 판단된다.
보검선인장(Opuntia ficus-indica var. saboten) 및 용과(Hylocereus undatus)의 부위별 플라보노이드 특성 비교
이선혜,김헌웅,이민기,Gelila Asamenew,김영진,이수지,차연수,유선미,김정봉 한국식품영양과학회 2018 한국식품영양과학회지 Vol.47 No.12
보검선인장 및 용과의 부위별 시료로부터 고해상도 ToF- MS 및 구조동정용 라이브러리를 이용하여 kaempferol, quercetin, isorhamnetin 계열의 아글리콘 및 배당체로 구성된 24종의 flavonol 유도체가 분리・동정되었다. 이들 중 isorhamnetin 3-methyl ether 및 kaempferol 3-O-galactoside(trifolin)는 보검선인장에서, isorhamnetin 3-O- rutinoside-7-O-rhamnoside 및 quercetin 3-O-robinobioside는 용과의 과피에서 신규 flavonol 화합물로 확인되었다. 특히 선인장 시료에서 공통으로 확인된 주요 성분은 isorhamnetin 3-O-rutinoside(narcissin) 및 isorhamnetin 3-O-robinobioside로 나타났으며, 보검선인장의 경우 총 플라보노이드 함량은 엽상경(껍질 포함)> 열매(전체)> 엽상경(껍질 제거) 순으로 높았고, 용과는 과육보다 과피에서 월등히 높은 함량을 나타내었다. 따라서 선인장 시료 중 플라보노이드가 주로 분포된 부위는 엽상경(껍질) 및 용과(과피)였으며, 추후 이들 부산물을 산업원료로 이용하여 플라보노이드 고함유 기능성 소재로서 식품, 화장품, 의약품, 사료첨가제와 같이 다양한 산업에 응용할 수 있을 것으로 기대된다. A LC-MS library for the identification of flavonoids was constructed from the Cactaceae family based on previous reports. A total of 24 flavonol derivatives were identified in the used parts of Opuntia ficus-indica var. saboten (prickly pear) and Hylocereus undatus (dragon fruit) using UPLC-DAD-QToF/MS and a constructed library. Among them, as new flavonol derivatives, isorhamnetin 3-methyl ether and kamepferol 3-O-galactoside (trifolin) were tentatively identified in prickly pear, and quercetin 3-O-robinobioside and isorhamnetin 3-O-rutinoside-7-O-rhamnoside were identified in dragon fruit (peels). In particular, isorhamnetin 3-O-rutinoside (narcissin) and isorhamnetin 3-O-robinobioside were confirmed as the major compounds in both samples. The flavonoid contents of prickly pear increased in the order of cladode (un-peeled)> whole fruit> cladode (peeled), and dragon fruit showed higher concentrations in the peels than pulps, suggesting that the by-products of these plants are more valuable as functional resources for various industries, such as foods, cosmetics, and pharmaceuticals.
UPLC-DAD-ESI(+)-QToF/MS를 이용한국내산 두릅나무 및 음나무 순 내 페놀산 특성 비교
김영진,김헌웅,이민기,이선혜,Gelila Asamenew,이수지,이상훈,차연수,김정봉 한국환경농학회 2018 한국환경농학회지 Vol.37 No.4
BACKGROUND: In this study, shoots of Aralia elata and Kalopanax pictus which belong to the Araliaceae family were analyzed using UPLC-DAD-ESI(+)-QToF/MS to characterize of individual phenolic acids. METHODS AND RESULTS: Total thirteen phenolic acids were identified, and nine hydroxycinnamic acid derivatives have been identified for the first time in shoots of Aralia elata and Kalopanax pictus. For total phenolic acid content (mg/100g dry weight), shoots of Aralia elata and Kalopanax pictus showed 754.8 and 845.3 mg/100g, respectively. 5-O-Caffeoylquinic acid (49%) and 3,5-di- O-caffeoylquinic acid (44%) were found as major phenolic acids in Aralia elata, while 5-O-caffeoylquinic acid (91%) was a major component in Kalopanax pictus. CONCLUSION: On comparing the two plants, it was considered that the biosynthesis of 3,5-di-O-caffeoylquinic acid can be affected by 5-O-caffeoylquinic acid in Aralia elata.