• 제목/요약/키워드: open column chromatography

검색결과 95건 처리시간 0.025초

Phytochemical Constituents of Bitter Melon (Momordica charantia)

  • Kim, Hyun Young;Mok, So-Youn;Kwon, Su Hyeong;Lee, Dong Gu;Cho, Eun Ju;Lee, Sanghyun
    • Natural Product Sciences
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    • 제19권4호
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    • pp.286-289
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    • 2013
  • Phytochemical constituents were isolated from bitter melon (the fruits of Momordica charantia) through open column chromatography. Their structures were identified as ${\beta}$-sitosterol (1), (23E)-$5{\beta}$,19-epoxycucurbita-6,23-diene-$3{\beta}$,25-diol (2), daucosterol (3), uracil (4), and allantoin (5) by interpretation of spectroscopic analysis including MS and $^1H$- & $^{13}C$-NMR. Among them, allantoin (5) was isolated from this plant for the first time.

Phytochemical constituents of Lactuca serriola leaves and their content analysis by HPLC-UV

  • Kim, Juree;Lee, Hak-Dong;Choi, Jungwon;Lee, Sanghyun
    • Journal of Applied Biological Chemistry
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    • 제65권3호
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    • pp.153-158
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    • 2022
  • This study aimed to identify the phytochemical constituents of Lactuca serriola leaves and perform quantitative analysis of the methanol (MeOH) extract of L. serriola, L. indica, L. raddeana, L. sativa, and L. triangulata. Six compounds were isolated from the MeOH extracts of L. serriola using open column chromatography and identified as protocatechuic acid (1), caffeic acid (2), cynaroside (3), apigenin 7-glucuronide (4), luteolin (5), and apigenin (6) using 1H-, 13C-nuclear magnetic resonance, and mass spectrometry. Quantitative analysis of the six compounds was performed on the MeOH extract of Lactuca species using high-performance liquid chromatography (HPLC) and an ultraviolet (UV). A reverse-phased column was used, and the UV absorbance was set to 280 nm. The contents of compounds 2 and 3 were the highest (1.58 and 2.64 mg/g ext., respectively) in L. serriola extracts. However, compounds 4 and 6 were higher (1.46 and 0.40 mg/g ext., respectively) in L. triangulata. These results provide quantitative data for the application of Lactuca species in the pharmaceutical and functional food industries.

홍국 유래 Monacolin K의 안정성 및 분리 (Stability and Isolation of Monacolin K from Red Yeast Rice)

  • 최무영;곽은정;임성일
    • 한국식품영양과학회지
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    • 제33권6호
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    • pp.1022-1027
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    • 2004
  • 홍국을 이용한 기능성 건강식품을 개발하기 위해서는 먼저 홍국의 유효성분인 monacolin K의 안정성을 검토할 필요성이 있다. 이에 열(20, 40, 60, 8$0^{\circ}C$), pH(2, 4, 8, 10), 유기산(pH 4.0으로 조정하기 위해 6% acetic acid, 0.6% citric acid, 1.5% lactic acid를 첨가) 및 수분량(0∼80%)을 조절하여 저장하면서 monacolin K 함량을 측정하였다. 그리고 중성 aluminum oxide를 이용하여 open column chromatography를 행하여 홍국으로부터 monacolin K를 분리하였다. 그 결과, monacolin K는 4$0^{\circ}C$ 이상의 온도에서 상당히 불안정하여 분해되었다. pH에 대해서는 pH를 조절하지 않은 상태 (pH 5.9) 에서 가장 안정하였고, 이어서 pH 8>4, 2>10의 순이었다. 3종의 유기산에 대한 안정성은 lactic acid>citric acid>acetic acid의 순으로 안정하였고, 산에 의한 안정성은 강산과 약산에 의한 차이보다 산의 종류에 따라 다른 것으로 사료되었다. 또한 monacolin K는 수분 함량이 증가함에 따라 분해율이 현저히 증가하였다. Open column chromatography에 의해 monacolin K는 홍국 중의 적색 및 홍색 색소나 다른 비색소성 성분으로부터 분리 할 수 있었으며, 이의 회수율은 70%로 나타났다.

폴리에스테르의 첨가제 분석법(I) (Analytical Method of additive in Polyester (I))

  • 정종화;이경희
    • 분석과학
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    • 제12권1호
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    • pp.84-88
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    • 1999
  • A method to analyze additives in a polyester resin has been studied by utilizing a centrifuge and a thin layer chromatography. Identification of the separated organic and inorganic compounds were carried out by spectrophotometers, such as NMR, UV-VIS, IR and XRD. For the polyester resin studied in this research contained organic and inorganic compounds which were found to be a dimer form of 2-phenylbenzoazole and an anatase form of $TiO_2$, respectively.

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A Study on Capillary Column Ion Chromatography

  • 김호현;표동진
    • 한국환경과학회:학술대회논문집
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    • 한국환경과학회 2001년도 정기총회 및 봄 학술발표회 초록집
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    • pp.115-116
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    • 2001
  • 본 연구에서는 이온 크로마토그래피로 환경오염물질들을 분석하고자 할때의 단전들을 해소하기 위하여 모세관 컬럼 이온 크로마토그래피를 개발하였다. 모세관 컬럼은 두가지 형태로 개발하였는데 하나는 packed capillary 컬럼이며 다른하나는 open tubular capillary 컬럼이다. 또한 위와 같이 모세관 컬럼을 개발하여 사용하게됨을써, 부수적으로 펌프, 시료주입기, 억압장치 그리고 전도도 셀 등을 모두 적은 부피를 다룰 수 있는 구조로 바꾸어 주었다. 따라서 본 연구의 결과로 미량환경오염 물질의 분석에 모세관 컬럼 이온크로마토그래피를 이용할 수 있는 가능성을 확인할 수 있었고, 나아가 이온 크로마토그래피의 소형화로 현장에서 직접 분리, 분석을 할 수 있으리라 기대된다.

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Purification of Isoflavone from Soybean Hypocotyls using Various Resins

  • Choi Yeon-Bae;Kim Kang-Sung
    • 한국환경보건학회지
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    • 제31권3호
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    • pp.221-226
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    • 2005
  • Isoflavone was extracted with various concentration of aqueous methanol using whole hypocotyls as the starting material. Whole hypocotyls were preferred as the raw material because the residue could be easily removed from the solvent after the extraction process. Extraction yield was almost constant at the methanol concentration of $20-80\%$. Most of the isoflavone was extracted within 1 hr, and the extraction yield remained almost constant thereafter. When the concentration of methanol was $80\%$, the content of total solid was reduced due to the reduced extraction of contaminating protein as the result of protein insolubilization. Among resins tested, Diaion HP-20, Amberlite XAD-16, and Amberlite IRC-50 showed the highest capacity to absorb the compound. Open column chromatography with Diaion HP-20 showed that $80\%$ aqueous ethanol was most efficient as the eluting solvent with final recovery of the phytochemical being more than $95\%$. Maximum adsorption of the phytochemical occurred at the acidic pH 2-4. When the spatial velocity was increased to 15 and more, the degree of adsorption was decreased, whereas below spatial velocity of 15, the adsorption capacity of isoflavone to the resin was almost constant. The purity of the isoflavone purified by column chromatography was $78\%$.

난황유의 지방산 조성에 관한 연구 (Studies on the Fatty Acid Composition of Egg Yolk Oil.)

  • 고무석;김종숙;최옥자;김용두
    • 한국식품조리과학회지
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    • 제13권2호
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    • pp.87-91
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    • 1997
  • 방사구와 비방사구에서 채취한 달걀 난황을 배소·압착하여 얻은 난황유를 Folch법으로 정제한 후 gas chromatography로 지방산 조성을 분석한 결과는 다음과 같다. 난황유의 총지질과 중성지질의 지방산 조성은 oleic acid, palmitic acid, linoleic acid 순으로 주성분을 이루었고, 당지질은 palmitic acid, oleic acid, stearic acid, lauric acid 순으로, 인지질은 oleic acid, lauric acid, palmitic acid 순으로 주성분을 나타냈다. 포화지방산 함량은 방사구 보다 비방사구에서 약간 높았고, 포화지방산에 대한 불포화지방산의 비율(USFA/SFA)은 비방사구보다 방사구에서 높았다.

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한국산 갈색거저리로부터 분리된 항진균단백질의 항균효과와 그 작용 범위 (Antifungal Effect and activity spectrum of crude antifungal proteins from hemolymph of larvae of Tenebrio molitor in Korea)

  • 정승조;이영훈;정재훈;이복률;한동민
    • 한국균학회지
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    • 제23권3호통권74호
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    • pp.232-237
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    • 1995
  • 거저리 유충의 혈림프로부터 항진균성 단백질을 $C_{18}$ open column chromatography로 부분 정제하여 3종류의 효모형 진균류와 4종류의 사상형 진균류에 대한 항진균 활성을 측정하였다. 항균단백질은 대부분의 균류에 대해 생장억제의 활성을 보여주었으며 Saccharomyces cerevisiae와 Candida albicans에 대해서는 미약하나마 치사효과가 관찰되었다. 항진균단백질을 처리하였을 때, 달걀형의 효모형 균체모양이 둥글고 크게 변하였다. 사상형 진균류에 대해서는 생장억제 효과와 함께 균사체의 정단 부위가 심하게 변화한 형태가 관찰되었다. 이러한 결과로부터 거저리 유충의 혈림프에는 비교적 넓은 범위의 진균류에 대해 치사 또는 생장억제 기능을 가진 항진균 단백질들이 존재함을 알 수 있었다.

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Determination of pectolinarin in Cirsium spp. using HPLC/UV analysis

  • Cho, Sunghun;Lee, Jaemin;Lee, Yoon Kyoung;Chung, Mi Ja;Kwon, Ki Han;Lee, Sanghyun
    • Journal of Applied Biological Chemistry
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    • 제59권2호
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    • pp.107-112
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    • 2016
  • Pectolinarin was isolated from the ethyl acetate fraction of Cirsium setidens using open column chromatography and was analyzed using spectrometry. Pectolinarin content in Cirsium spp. was determined using HPLC/UV. Pectolinarin content in the aerial part of Cirsium spp. was higher than that in the root and pappus. Pectolinarin content was highest in the aerial part of C. chlorolepis (110.65mg/g extract). Consequently, the aerial part of C. chlorolepis has potential for use in new natural medicinal products, health supplements, and beverages.

Phytochemical Identification from Boehmeria nivea Leaves and Analysis of (-)-Loliolide by HPLC

  • Cho, Sunghun;Lee, Dong Gu;Jung, Yong-Su;Kim, Ho Bang;Cho, Eun Ju;Lee, Sanghyun
    • Natural Product Sciences
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    • 제22권2호
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    • pp.134-139
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    • 2016
  • Phytochemicals were isolated from leaves of the fiber crop, ramie (Boehmeria nivea, Bn), using open column chromatography and medium pressure liquid chromatography. Their structures were identified as ${\beta}$-sitosterol, (-)-loliolide, rutin, and pyrimidinedione by MS, $^1H$-, and $^{13}C$-NMR spectroscopic analysis. Among them, (-)-loliolide was isolated for the first time from B. nivea. A content analysis of (-)-loliolide in B. nivea collected from different regions and harvest times was conducted by HPLC. The highest content of (-)-loliolide was found in Bn-23 harvested in September. These results will be helpful to use the plant which harvest in September as a high content phytochemical additive in food, health supplements, and medicinal products.