• Title/Summary/Keyword: Nelumbo nucifera leaf

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Screening of Crude Drugs for Antioxidative Activity (생약추출물의 항산화 활성검색)

  • Na, Min-Kyun;An, RenBo;Lee, Sang-Myung;Hong, Nam-Doo;Yoo, Jae-Kuk;Lee, Chan-Bok;Kim, Jin-Pyo;Bae, Ki-Hwan
    • Korean Journal of Pharmacognosy
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    • v.32 no.2 s.125
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    • pp.108-115
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    • 2001
  • Based on DPPH radical scavenging activity and lipid peroxidation inhibitory activity, the MeOH extracts of 139 crude drugs were screened in order to search for antioxidants. Among tested samples, the extracts from the seed of Nelumbo nucifera, the fruit of Terminalia chebula var. gangetia, the root of Salvia miltiorhiza, the fruit of Ziziphus jujuba var. innermis, the root bark of Paeonia moutan, the fruit of Rubus coreanus, the fruit of Zanthoxylum schinifolium, the lignum of Caesalpinia sappan, the leaf of Pinus densiflora, the rhizome of Alpinia officinarum, the fruit of Syzygium aromaticum, the ramulus and uncus of Uncaria rhynchophylla, the root bark of Lycium chinense, and the fruit of Alpinia katsumadai showed a relatively strong antioxidative activity. Furthermore, the BuOH fraction from the extract of N. nucifera showed a potent activity in each assay. The isolation of bioactive compounds has been carried out and will be reported in the next paper.

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Anti-thrombotic Activities of Hot-water Extracts Prepared from Various Parts of Nelumbo nucifera Gaertner (다양한 부위의 연(Lotus) 열수 추출물의 항혈전 활성)

  • Ahn, Seon-Mi;Sung, Hwa-Jung;Kim, Jong-Sik;Park, Jong-Yi;Sohn, Ho-Yong
    • Journal of Life Science
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    • v.28 no.10
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    • pp.1156-1162
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    • 2018
  • To investigate the anti-thrombotic activities of the lotus (Nelumbo nucifera Gaertner), various hot-water extracts were prepared from the leaf, pod of seed (PS), seed, embryo of seed (ES), root, and the node of root (NR) of the lotus. The highest extraction ratio was found in the NR (20.3%), followed by the seed, root, leaf, ES, and PS. These extracts had pH and acidity levels ranging from 5.6~6.5 and 0.06~0.20%, respectively. The seed extract showed 70% brix, whereas the leaf and PS extracts showed less than 0.1% brix. The highest contents of total polyphenol (179.7 mg/g), total flavonoids (161.4 mg/g), and reducing sugar (161.4 mg/g) were observed in the leaf extract, and the highest total sugar content (873.0 mg/g) in the seed extract. Anti-coagulation assay of the extracts of NR, leaf, and PS showed strong activities. In particular, at a concentration of 5 mg/ml, the PS extract had 15-fold extended thrombin, prothrombin, and activated partial thromboplastin times. However, only the ES extract showed activities inhibitory to platelet aggregation, with treatment with 0.25 mg/ml of ES extract decreasing platelet aggregation to 25.1%, a reduction comparable to that effected by aspirin. The extracts other than the seed extract showed no hemolysis activities against human RBC at treatments of up to 1 mg/ml. These results suggest that the NR, PS, seed, and ES, all byproducts of the lotus agriculture industry, have high potential as novel sources of anti-thrombotic agent.

Screening of Herbal Medicines from China with Inhibitory Activity on Advanced Glycation End Products (AGEs) Formation (VI) (중국약용식물의 최종당화산물 생성저해활성 검색 (VI))

  • Lee, Yun-Mi;Kim, Young-Sook;Kim, Joo-Hwan;Kim, Jin-Sook
    • Korean Journal of Pharmacognosy
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    • v.42 no.2
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    • pp.161-168
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    • 2011
  • Advanced glycation end products (AGEs) has been shown to play an important role in the development of the diabetic complications. The AGEs inhibitors or cross-link breakers attenuate various functional and structural manifestations of diabetic complications. In this study, 69 China herbal medicines have been investigated with an in vitro evaluation system using AGEs inhibitory activity. Of these, 28 herbal medicines $IC_{50}$=<50 ${\mu}g/ml$) were found to have stronger AGEs inhibitory activity compared with aminoguanidine ($IC_{50}$=59.77 ${\mu}g/ml$). Particularly, 5 herbal medicines, Camptotheca acuminata (stem, leaf), Eurya groffii (stem, leaf), Cornus Capitata (leaf), Mucuna birdwoodiana (root), Nelumbo nucifera (fruit, seed) showed more potent inhibitory activity (approximately 6-27 fold) than the positive control aminoguanidine.

Antioxidant Properties of Lotus Leaf (Nelumbo nucifera) Powder and Barley Leaf (Hordeum vulgare) Powder in Raw Minced Pork during Chilled Storage

  • Choe, Ju-Hui;Choi, Ji-Hun;Choi, Yun-Sang;Han, Doo-Jeong;Kim, Hack-Youn;Lee, Mi-Ai;Kim, Si-Young;Kim, Cheon-Jei
    • Food Science of Animal Resources
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    • v.31 no.1
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    • pp.32-39
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    • 2011
  • The effects of additions of lotus leaf (0.1 and 0.5%) and barley leaf powder (0.1 and 0.5%) on the lipid oxidation and microbiological analysis of raw minced pork were investigated after 1, 4, 7, and 10 d at chilled storage. Days of storage caused (p<0.05) decreases in pH values in samples with lotus leaf (LP) and barley leaf powder (BP). $L^*$ and $a^*$ values decreased, and $b^*$ values increased in the treatments with increasing lotus leaf and barley leaf powder contents, respectively. The decrease in $a^*$ values was lowest (p<0.05) in the treatment with 0.1% BP. Thiobarbituric acid reaction substance values and free fatty acids in 0.5% LP were lowest (p<0.05) on day 10. Thus, the addition of lotus leaf powder significantly improved lipid oxidative stability in the raw minced pork during chilled storage of 10 d. Furthermore, the raw minced pork treatments with LP and BP presented low peroxide values and total microbes as compared to control (-) (without LP and BP). These results indicate that LP and BP can be incorporated into raw minced pork as natural additives to retard oxidation.

Effects of Lotus (Nelumbo nucifera) Leaf Hot Water Extracts on the Quality and Stability of Eggs using Ultrasonication Treatment during Storage

  • Lee, Jihye;Seo, Han Geuk;Lee, Chi-Ho
    • Food Science of Animal Resources
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    • v.40 no.6
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    • pp.1044-1054
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    • 2020
  • This study was performed to investigate the effects of lotus leaf hot water extracts treatment on the quality and stability of eggs using impregnation treatment through ultrasonication during storage. A total of 480 eggs were categorized into four treatment groups (n=30 each)-non-treated (CON), soaked for 30 min in lotus leaf hot water extracts without ultrasonication (T1), sonicated in distilled water (T2), and sonicated in lotus leaf hot water extracts (T3)-and stored for 15 d at 30℃. The egg weight, Haugh unit (HU), egg grade, albumen height, yolk color, eggshell thickness, eggshell breaking strength, and weight loss were measured for egg quality assessment. 2-Thiobarbituric acid reactive substance (TBARS) and volatile basic nitrogen (VBN) contents were measured as stability indicators. Additionally, total phenolic contents (TPC), total flavonoid contents (TFC), and 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity were evaluated. The HU, egg grade, albumen height, and yolk color of T3 were significantly higher than those of CON (p<0.05). No significant differences in eggshell thickness and eggshell breaking strength are observed among the groups. The weight loss of T3 was significantly lower than that of the other groups during storage (p<0.05). The application of lotus leaf hot water extracts also significantly reduced TBARS and VBN (p<0.05). The TPC, TFC, and DPPH radical scavenging activity of T3 were significantly higher than those of the other groups (p<0.05). These results suggest that lotus leaf hot water extracts may be useful as a natural ingredient for improving the quality and stability of eggs during storage.

Effects of Lotus (Nelumbo nucifera) Leaf on Quality and Antioxidant Activity of Yogurt during Refrigerated Storage

  • Kim, Da-Hee;Cho, Won-Young;Yeon, Su-Jung;Choi, Sung-Hee;Lee, Chi-Ho
    • Food Science of Animal Resources
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    • v.39 no.5
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    • pp.792-803
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    • 2019
  • The supplementation with natural ingredients that are rich in polyphenols could improve the quality and functionality of yogurt. Lotus leaf (LL) are abundant in phenolic compounds. We aimed to investigate the effects of LL powder on the quality properties, total phenolic content (TPC), and antioxidant activity of yogurt. Yogurt was supplemented with four different concentrations (0%, 0.2%, 0.5%, and 1%) of LL powder and evaluated for 14 d refrigerated storage. During storage, the titratable acidity (TA) of all LL yogurt groups was higher than that of the control (p<0.05). The $L^*$ and $a^*$ values decreased by LL addition to the yogurts, while the $b^*$ values increased. All LL yogurt groups indicated better viscosity than that of control, and among them, 0.2% LL yogurts had the highest viscosity without significant decrease until the end of the storage duration. The addition of LL into yogurt enhanced the water-holding capacity (WHC) by at least 1.5-fold than that of control for the entire storage duration. The TPC of yogurts gradually increased with the addition of LL (p<0.05) and continued to increase during storage; the 1% LL yogurt at 14 d showed the highest value of $61.94{\pm}1.68{\mu}g$ GAE/g. The DPPH (2,2-diphenyl-1-picrylhydrazyl) radical scavenging activity and reducing power of the yogurts were also significantly enhanced with increasing LL concentrations (p<0.05). These results suggest that lotus leaf may be useful as a natural ingredient for improving the quality and antioxidant activity of yogurt.

Quality Characteristics of Nelumbo nucifera G. Tea White Bread with Hemicellulase (헤미셀룰라아제를 첨가한 백련차 식빵의 품질 특성)

  • Kim, Young-Sook;Kim, Mun-Yong;Chun, Soon-Sil
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.37 no.10
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    • pp.1294-1300
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    • 2008
  • Nelumbo nucifera G. tea white breads were prepared by the addition of 0.01, 0.02, 0.03, and 0.04% hemicellulase to flour of the basic formulation. The experiments and control were then compared in terms of quality characteristics, including pH, total titratable acidity, fermentation power of dough expansion, specific volume, baking loss, moisture content, color, textural characteristics, external and internal surface appearances, and sensory qualities in order to determine the optimal ratio of hemicellulase in the formulation. There were no significant differences in pH and total titratable acidity of dough among the experiments. Fermentation power of dough expansion were increased as incubation time increased. Baking loss was the highest at the 0.04% addition level, while the lowest at the 0.01% level. As hemicellulase content increased, pH, hardness, and fracturability of bread decreased, while total titratable acidity, specific volume, and resilience increased. Water content and lightness were the highest in the control bread samples, and yellowness was maximal in the 0.01% group. Bread made by the addition of hemicellulase had significantly higher greenness and flavor than the control group. Color, consistency, and springiness of crumb, density and uniformity of crumb pore, softness, chewiness, overall acceptability, lotus leaf flavor, delicious taste, astringency, bitterness, and off-flavor were not significantly different among the samples. The results indicate that adding 0.02$\sim$ 0.03% hemicellulase in N elumbo nucifera G. tea white bread is optimal for quality and provides a product with reasonably high overall acceptability.

Quality Characteristics of Fish Paste Containing Lotus(Nelumbo nucifera) Leaf Powder (연잎 분말 함유 어묵의 품질 특성)

  • Shin, Young-Ja
    • Korean journal of food and cookery science
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    • v.23 no.6
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    • pp.947-953
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    • 2007
  • This study was conducted to promote the utilization of fish paste with added lotus leaf powder as a food. The tested concentrations of lotus leaf powder were 0, 0.5, 1, 1.5, and 2%. All the samples of fish paste with added lotus leaf powder had 37% water content. For the Hunter color values, the L, a and b values of the fish paste decreased with increasing concentrations of lotus leaf powder. And the folding test presented a good score(AA). In the texture meter test, the gumminess, and brittleness decreased according to increasing concentrations of lotus leaf powder. However, the hardness, cohesiveness, and springiness of the fish paste were not significantly changed by the addition of lotus leaf powder. In the sensory evaluation, the lotus leaf flavor, hardness, and adhesiveness increased as the concentrations of lotus leaf powder increased. The fish paste with 0.5% lotus leaf powder(0.5 LP) showed the highest acceptance scores in terms of pleasant taste and springiness. The fish paste with 0.5% lotus leaf powder(0.5 LP) also showed the highest acceptance scores for appearance, flavor, taste, texture, and overall quality. Therefore, the results suggest that lotus leaf powder can be applied to fish paste to increase its quality and functionality.

Quality characteristics of Maejakgwa with added Nelumbo nucifera leaf powder (연잎 분말을 첨가한 매작과의 품질특성)

  • Park, Bock-Hee;Park, Mee-Young;Cho, Hee-Sook
    • Food Science and Preservation
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    • v.21 no.3
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    • pp.328-333
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    • 2014
  • The principal objective of this study was to determine the quality characteristics of Maejakgwa prepared with the addition of lotus leaf powder. The moisture, crude ash, crude protein, crude lipid, and carbohydrate contents of the used lotus leaf powder were 2.97%, 8.09%, 22.83%, 0.93%, and 65.18%, respectively. The pH of the Maejakgwas dough decreased significantly as the level of lotus leaf powder increased; however, there were no significant differences in dough values among the test groups. Furthermore, the spread factor values and water contents of the groups increased significantly as the level of the lotus leaf powder concentration. In addition, the Hunter's color L, a, and b values decreased significantly with increasing amounts of lotus leaf powder. In the texture meter test, the hardness increased according to increasing concentrations of lotus leaf powder. Finally, the results of a sensory properties showed that Maejakgwas containing 2% lotus leaf powder had the highest scores. These results suggest that lotus leaf powder can be applied to Maejakgwas to achieve high quality and functionality.