• Natural Product Sciences
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• v.21 no.1
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• pp.42-48
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• 2015

Lactuca raddeana (Compositae) is used to treat obesity and complications due to diabetes. The five phenolic compounds including chlorogenic acid, chicoric acid, luteolin 7-O-glucoside, luteolin 7-O-glucuronide, luteolin were qualitatively identified by LC-ESI-MS analysis. The contents were quantitatively determined by HPLC, under the condition of a Capcell Pak C18 column ($5{\mu}m$, $250mm{\times}4.6mm\;i.d.$) and a gradient elution of 0.05% trifluoroacetic acid (TFA) and 0.05% TFA in $MeOH-H_2O$ (60 : 40). The contents of chicoric acid (100.99 mg/g extract) and luteolin 7-O-glucoside (101. 69 mg/g extract) were high, while those of other three phenolic substances were very low. The 3T3-L1 adipocyte cells treated with chicoric acid and luteolin 7-O-glucuronide significantly suppressed the accumulation of fat, suggesting they are effective against obesity. Since high level of peroxynitrite (ONOO) causes cardiovascular disease in obese patients, its scavenging activity was also studied.

• Korean Journal of Medicinal Crop Science
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• v.3 no.2
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• pp.151-155
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• 1995

Chromatographic separation of Laduca raddeana extract afforded a mixture of fatty acyl triterpene, triterpene acetates and primary long chain alcohol. The kind of triterpene moieties in these two triter­penoids was six, i.e., ${\beta}-amyrin,\;{\alpha}-amyrin$, lupeol, pseudotaraxasterol, taraxasterol and germanicol on the basis of chemical and spectroscopic methods. The acyl moieties in the corresponding acyl mixture were characterized as acetates, myristate, palmitate, stearate and arachidate. And a mixture of primary long chain alcohol were composed of teracosanol and hexacosanol.

• Journal of the Korean Society of Environmental Restoration Technology
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• v.8 no.4
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• pp.32-42
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• 2005

To investigate the plants invasion process and dominant species in large-scale cutting slopes, slopes elapsed one year to thirteen years after construction had been selected in five counties. The obtained results are summarized as follows : The species of high appearance frequency were Alnus firma, Arundinella hirta, Miscanthus sinensi var. purpurascens, Erigeron cancdensis, Artemisia princeps var. orientalis, Oenothera odorata, Lactuca raddeana, Lactrca indica var. laciniata, Lespedeza bicolor, Youngia sonchifolia, Populus albaglandulosa, and so on. The biological type of identified vascular plants was $Ch-D_1-R_{5-e}$. In time, plant coverage was increased gradually and average of plant coverage was 1.17% in slopes which elapsed one year, 42.44% after six years, 56.67% after eight years, and 69.17% after ten years. The dominant species in the surveyed slopes were covered with Alnus firma, Artemisia princeps var. orientalis, Erigeron cancdensis, Miscanthus sinensi var. purpurascens, Arundinella hirta, Lactuca raddeana, Oenothera odorata, Boehmeria spicata, Kummerowia striata and Artemisia montana of the 59 species. The conditions of location in large-scale cutting slopes are hard to fix and germinate of seeds, and extend plant roots in the slope soil. Hence, the highly appearance species and dominance species of the area will make plant coverage quick and slope stable.

• Journal of Applied Biological Chemistry
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• v.65 no.3
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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.