• Journal of the Korean Society of Food Science and Nutrition
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• v.46 no.2
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• pp.229-236
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• 2017

This study was performed to optimize yanggaeng processing conditions prepared with different amounts of steamed Liriopis tuber (SLT) extract, sugar, and agar powder using response surface methodology. The experimental conditions were designed according to the central composite design with 16 experimental points, including two replicates for three independent variables. The experimental data on physicochemical properties, textural properties, and sensory evaluation were fitted to various models, and the accuracy of the equations was analyzed by ANOVA. Among the responses, pH, water content, sugar content, L-value, browning index, chewiness, gumminess, and sensory properties of appearance, color, sweetness, hardness, texture, and overall acceptability showed significant correlation with contents of SLT, sugar, and agar powder. From these results, optimum formulation of yanggaeng was calculated as follows: SLT 35 mL, sugar 55.23 g, and agar powder 3.39 g.

• Journal of the Korean Society of Food Science and Nutrition
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• v.39 no.10
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• pp.1503-1508
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• 2010

This study was conducted to investigate physicochemical characteristics, antioxidant activities, and sensory evaluation of water extracts from Liriopis tuber (Liriope platyphylla Wang et Tang; LP) treated with roasting over various temperatures ($150{\sim}190^{\circ}C$). The LP water extracts showed increase of total sugar, reducing sugar, total protein, and total saponins except pH as roasting temperature was elevated. The browning index, and a and b values of color were increased, however, L value was decreased as temperature was elevated. 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical, superoxide anion radical, and nitrite scavenging activities and trolox equivalent antioxidant capacity of LP water extracts were increased by 6.77, 2.37, 4.02, and 4.92 times, respectively, after roasting at $190^{\circ}C$. In sensory evaluation, LP water extracts roasted at $170^{\circ}C$ showed the highest scores in color, savory taste, flavor, and overall acceptability.

• Food Science and Preservation
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• v.17 no.1
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• pp.123-130
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• 2010

We compared physiological activities in reflux extracts from Liriope platyphylla leaves and roots. The water extract of roots had the highest solid extraction yield of 53.96%. The greatest level of total polyphenols was 186.88 mg/g in methanol extracts from leaves, whereas water extract from leaves showed the highest concentration of flavonoid compounds, at 159.29 mg/g. The leaf extract had 97.42% of the electron-donating ability (EDA) of the positive control, at 0.5 mg/mL. The superoxide dismutase (SOD)-like activity of water extract of leaves was 9.75% of the positive control value, at 1.0 mg/mL. The nitrite scavenging ability of methanolic extract from leaves was highest, at 40.56% of the positive control level at pH 1.2 and a concentration of 1.0 mg/mL, whereas root extracts were ineffective in this regard. Inhibition of xanthine oxidase by leaf extracts was more than 99% of the positive control value at 1.0 mg/mL, whereas water and methanolic root extracts had activities of 93.75% and 68.47%, respectively. When tyrosinase inhibition was examined, the water extract of leaves had 22.80% of positive control activity but methanolic extracts were inactive. These results indicate that leaves of L. platyphylla will be more useful for development of functional products than the roots, which are used to make medicinal preparations.

• Journal of the Korean Applied Science and Technology
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• v.34 no.2
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• pp.254-259
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• 2017

The ethanol extraction yield of Liriope platyphylla(Lp) was about 30.7% by extract apparatus. This study was done to investigate the carbohydrate metabolism related enzyme activities effects of Lp in streptozotocin (STZ)-induced diabetic rats. The contents of serum glucose, triglyceride (TG) were significantly decreaed in Lp treated group compared to the those of STZ-control group, also content of Total cholesterol was decreased. High density lipoprotein (HDL)-cholesterol was increased in Lp treated group. The activity of glucose-6-pase(G-6-Pase) was significantly decreased in Lp treated group. Also the activity of glucokinase(Gk) was increaed in Lp treated group. The content of hepatic glycogen was significantly increaed in Lp treated group. These results indicated that ethanol extract of Lp would have antidiabetic effect in STZ-induced diabetic rats.

• Journal of the Korean Society of Food Science and Nutrition
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• v.46 no.3
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• pp.381-388
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• 2017

This study was performed to evaluate the effects of Liriopis tuber (SLT) extracts on cookie production conditions for reduction of sugar usage through response surface methodology (RSM). The experimental conditions were designed according to the central composite design with 17 experimental points, including three replicates for three independent variables such as the amounts of SLT extracts, butter, and sugar. The experimental data on quality and sensory evaluation of cookies were fitted with various models, and accuracy of the equations was analyzed by ANOVA. Among various responses, spread ratio, sugar content, lightness, redness, hardness, and sensory properties of color, texture, sweetness, appearance, and overall quality showed significant correlations with the contents of three independent variables. From these results, the optimum formulation of cookies for reduced usage of sugar was calculated as SLT extract 6.84 g, butter 47.20 g, and sugar 36.02 g. Optimized cookies showed improved sensory properties but no difference in sweetness compared to control cookies.

• Korean Journal of Environment and Ecology
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• v.30 no.4
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• pp.651-657
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• 2016

It is important to know know deleterious impact of deicing salt on plants for guidelines of planting along roads. The aim of this study was to determine the effect of calcium chloride ($CaCl_2$) on the growth and physiological characteristics of Liriope platyphylla and Pachysandra terminalis. The plants were grown from November of 2015 to March of 2016 in pots containing growing media with $CaCl_2$ at 0% (Control), 0.5%, 1.0%, 3.0%, and 5.0% (based on the weight). While plant growth and photosynthetic activity were significantly decreased in both plant species grown on the media with $CaCl_2$, the degree of sensitivity to $CaCl_2$ differed. The plant growth of Liriope platyphylla was considerably injured under higher than 3.0% of $CaCl_2$, whereas Pachysandra terminalis was all dead under higher than 1.0% of $CaCl_2$. This results indicate that Liriope platyphylla has higher degree of tolerance to the deicing salt than Pachysandra terminalis.

• The Hankook-Saengyark Bo
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• no.96
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• pp.2-2
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• 1985

• The Hankook-Saengyark Bo
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• no.226
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• pp.4-4
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• 1998

• Korean journal of food and cookery science
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• v.17 no.3
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• pp.211-217
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• 2001

The objective of this study was to evaluate the effect of functional herbal foods on the growth of intestinal lactic acid bacteria. When Bifidobacterium breve and human intestinal microflora were inoculated in the general anaerobic medium which contained each functional food water extract, most of functional herbal foods induced the growth of lactic acid bacteria by decreasing pH of the broth. The pH decreasing effects of Liriipe platyphylla and Platycodon grandiflorum were excellent. The growth of lactic acid bacteria effectively inhibited the bacterial enzymes, $\beta$-glucosidase and $\beta$ -glucuronidase. Eugenia caryophyllata and Liriipe platyphylla potently inhibited the productivity of P -glucosidase of B. breve and human intestinal bacteria. Cinnamomum cassia, Gardenia jasminoides and Platycodon grandiflorum potently inhibited the productivity of $\beta$-glucuronidase of human intestinal bacteria. The growth component isolated from Platycodon grandiflorum was sucrose (compound B).

• Korean Journal of Medicinal Crop Science
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• v.3 no.1
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• pp.56-60
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• 1995

Experiment for analysing changes of growth, tuber yield and total sugar content during wintering was performed with Maekmoondong 1(L. platyphylla WANG et TANG). The growth of over ground characteristics including leaf length, tiller number and fresh leaf weight lasted to the middle of April. The growth and filling of tuber were progressed and got to the top of tuber yield (387kg/l0a) in the middle of March, showing the optimum harvesting time in Big Blue Lilyturf cultivation. Total sugar content showed the highest value(79%) in the late of January and was decreased gradually to the middle of March during wintering. There was highly significant negative correlation between total sugar content and tuber yield.