Park, Jung-Suk;Chon, Sang-Uk;Moon, Eun Woo;Jeong, Cheol-Yun
Food Science and Preservation
/
v.23
no.4
/
pp.553-559
/
2016
The purpose of this study was to determine the content of phenolics and various anthocyanin compounds, and antioxidant and anticancer activities of the extracts from pomergranates, which were produced in two different regions including Goheung, Korea and California, USA. These pomergrantes were divided into juice, pericarp, and seed parts and each part was extracted with 95% methanol. Content of total phenolics [mg chlorogenic acid equivalents/kg DW] was highest in pericarp, followed by juice and seeds from pomergrantes in both regions. The anthocyanins identified in pomegranate fruit were cyanidin-3,5-diglucoside chloride (Cy3,5G), cyanidin-3-O-glucoside chloride (Cy3G), delphini din-3,5-di-O-glucoside chloride (Dp3,5G), delphinidin-3-O-glucoside chloride (Dp3G), pelargonidin-3,5-di-glucoside chloride (Pg3,5G), and pelargonidin-3-glucoside chloride (Pg3G). Among these, cyanidin-3,5-diglucoside chloride (Cy3,5G) was the major anthocyanin in California pomegranate fruit juice and Goheung pomegranate fruit pericarp. DPPH (1,1-diphenyl-2-picryl hydrazyl radical) free radical scavenging activity was dose-dependently increased, and was higher in pericarp part than juice or seed parts from pomergrantes in both regions. By MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide) assay, pericarp extracts from pomergrantes in both regions showed the highest anticancer activity, which was higher on Calu-6 for human pulmonary carcinoma than SNU-601 for human gastric carcinoma. Correlation between polyphenols and anticancer activity on Calu-6 was determined to be in the range of $r^2=0.8904$ to 0.9706.
Jeong, Da-Wool;Cho, Chi Heung;Rha, Chan Su;Lee, Seung Hwan;Kim, Dae-Ok
Korean Journal of Food Science and Technology
/
v.49
no.5
/
pp.538-543
/
2017
Astringent persimmon (Diospyros kaki Thunb. cv. Cheongdo-Bansi) peel with the astringency removed, which is a by-product of dried persimmon (gotgam), was investigated for its antioxidant and neuroprotective properties. A mixture of peel and 40% (v/v) aqueous ethanol was subjected to ultrasonication and then thermal and nonthermal treatments, to produce thermally-treated and nonthermally-treated persimmon peel extracts (TPE and NTPE, respectively). The total phenolic and flavonoid contents and the antioxidant capacity of TPE was approximately 1.3-1.8 times higher than those of NTPE. TPE resulted in the increased viability of neuronal PC-12 cells compared with NTPE. Furthermore, intracellular oxidative stress in PC-12 cells was more decreased by treatment with TPE than NTPE. Cholinesterases, such as acetylcholinesterase and butyrylcholinesterase, were more inhibited by treatment with TPE than NTPE. These results suggest that TPE is useful as a functional material to decrease oxidative stress in neuronal cells and to inhibit cholinesterases.
The in vitro antioxidant activities and neuronal cell protective effects of 60% (w/v) methanolic extract from Houttuynia cordata were investigated. The contents of total phenolics and quercitrin in the extract were 17.71 mg/g and 75.80 ${\mu}g$/g, respectively. DPPH and ABTS radical-scavenging activities were 87.79% and 99.27%, respectively, when the extract was tested at 5 mg/ml. The FRAP (ferric reducing/antioxidant power) assay showed a dose-dependent increse in activity. In a cell viability assay using MTT, the extract protected against $H_2O_2$-induced neurotoxicity. Lactate dehydrogenase (LDH) leakage was also inhibited by the extract, as was lipid peroxidation as shown using the mouse brain homogenate test. These data indicate that a 60% (w/v) methanolic extract of Houttuynia cordata has in vitro antioxidant activities, and ingestion there of may reduce the risk of developing neurodegenerative disorders.
Yun-Jin, Lee;Deok-Gyeong, Kang;Jong Sik, Kim;Man-Hyo, Lee;Ho-Yong, Sohn
Journal of Life Science
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v.33
no.1
/
pp.43-49
/
2023
Houttuynia cordata belongs to the Saururacease family and its leaves, stems, and roots have been used as oriental medicines to treat pneumonia, acute or chronic bronchitis, enteritis, and abscesses and to remove extravasated blood. Recently, the antioxidant, anti-inflammation, antibacterial, and anti-proliferation activities and protection abilities of H. cordata against liver and neuron cell damage have been reported. In this study, ethanol extract and its solvent fractions (fractions of hexane, ethyl acetate, butanol, and water residue) were prepared, and their antithrombosis, antidiabetes, antioxidant, and hemolysis activities were evaluated. The ethyl-acetate fraction of H. cordata (EF-HC) showed the highest polyphenol and flavonoids contents among the fractions and exhibited strong antithrombosis and antioxidant activities. The EF-HC at 5 mg/ml showed 2.09-folds of thrombin time, 2.19-folds of prothrombin time, and 1.69-folds of activated partial thromboplastin time compared to the their solvent control and 30.9, 19.9, and 49.6 ㎍/ml of RC50 against DPPH, ABTS, and nitrite radicals, respectively. Furthermore, the EF-HC did not show any hemolytic activity up to 1 mg/ml, whereas the hexane fraction of H. cordata showed 55% hemolysis at 1 mg/ml. This is the first report of the antithrombosis activity of H. cordata. Our results suggest that quercitirin, hyperoside, orientin, and isoquercitrin in EF-HC are related to its antithrombosis and antioxidant activities and that the EF-HC could be developed as a promising antithrombosis agent.
Kim, Su Jin;Oh, Won Jun;Kwon, Sung Pil;Nam, Gaewon
Journal of the Society of Cosmetic Scientists of Korea
/
v.47
no.4
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pp.341-352
/
2021
Acerola is an excellent ingredient because of its high natural vitamin C content, but it is difficult to stabilize and has hardly been studied as a cosmetic material. Therefore, this study developed a mixed liposome preparation for stabilizing acerola extract. As a safety test, the skin irritation test was evaluated by BCOP assay and HET-CAM assay. We evaluated the inhibition of tyrosinase activity, the whitening effect of melanin production, and the wrinkle effect of prochloragentype-I C-peptide production, and confirmed the possibility of functional cosmetics. In addition, a cream of liposomes containing acerola extract mixture was developed to evaluate the clinical studies of skin wrinkles and whitening. BCOP assay, HET-CAM assay and human skin primary irritation test results of liposomes containing acerola extract mixture showed no irritation and were safe from skin and eye. The result of tyrosinase activity by 75.8% at 1,000 ㎍/mL. As a result of the melanogenesis inhibition test, liposome with acerola extract showed the melanin content by 46.2% at 1,000 ㎍/mL that does not effect the viability of the B16F10 cell line. The result of collagen production test using ELISA kit, liposomes containing acerola extract mixture showed collagen synthesis ability by 152.1% at 1,000 ㎍/mL that does not affect the viability of the HS68 cell line. But it did not showed any inhibition of collagenase (MMP-1) activity at all concentrations in the MMP-1 activity inhibition test in the HS68 cell line. We performed clinical studies for the whitening and skin-wrinkle activity of cream containing acerola extract mixes liposome, was showed that the melanin contents and wrinkle was statistically significant reduction. These results suggest that liposomes containing acerola extract mixture have safe natural material, and skin wrinkle, whitening effects allowing their application in cosmetics as a natural product.
Kim, Ju;Lee, Sang-Koo;Kim, Jeong-Man;Kim, Tae-Heung;Kim, Ji-Soo;Park, Eun-Suk;Jeong, Jong-Sung
Korean journal of applied entomology
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v.47
no.3
/
pp.227-235
/
2008
Development of T. urticae was studied on the leaves of eggplant grown in hydroponics with silica contents of 0 mM, 1.7 mM, and 5.1 mM. As the levels of sllica increased, those of N, P, K, Ca, and Mg decreased and those of Si increased. While contents of calory, crude protein, carbohydrates, and vitamin C decreased, those of ash, fiber, and sugar increased. Biomass and content of cholorophyll decreased as the level of silica increased while leaves became thicker. Laboratory leaf disc tests provided with various silica levels revealed that feeding preference of T. urticae was the highest at 0 mM and the lowest at 1.7 mM. The oviposition preference decreased as the levels of silica increased, on the lower leaf appeared to hinder the feeding and the oviposition of T. urticae. The development slowed down both in female and male. Adult life span of female shortend as the silica level increased and that of male was the longest as 5.7 days at 0mM and the shortest at 1.7 mM. Oviposition period also shortened as the silica content increased. The number of eggs laid was the most as 86.3 at 1.7 mM while average oviposition per day was the least as 77 at 0 mM. No differences in hatchability was detected whereas the ratio of sex was the highest as 0.71 in favor of female at 0mM. $R_o$ and T decreased as the levels of silica increased. Rm and $\lambda$ was the lowest at 5.1 mM while Dt was the longest as 1.8271 at 5.1 mM and the shortest as 1.6991 days at 1.7 mM. Silica content in eggplant turned to affect the development of T. urticae, however, it deterred T. urticae from feeding and oviposition and the rate of increase tended to decrease due to lesser nutrients in the eggplant leaf.
These studies were carried out to investigate the quality of green tea processed by different 1st-pan-firing time and to select the best conditions of green tea processing. The results were as follows. At harvesting tea plant leaf, tea plants had 4 leaves, each leaf size was $6.4cm\;{\times}\;2.4cm$, and weight of 100 buds was 40.2g. The content of moisture of green tea was decreased with the prolongation of 1st-pan-firing time, and the yield of green tea at 10 min. pan-firing time was the highest value of 20.12%. After processing green tea, 1st 10 min. pan-fired one had much more contents of total nitrogen(TN 5.41%) and total amino acid(T.A.A; 3,282mg/100g) and less content of tannin(13.22%) and caffeine(1.64%) than the other treatments. The content of chlorophyll and vitamin C went down with the extension of 1st pan-firing period. Sixteen kinds of free amino acid including theanine as a good taste component of green tea were isolated and measured by HPLC. T.A.A contents were in the range of $2,447{\sim}3,192mg/100g$ and among various pan-firing methods, 10 min. 1st pan-fired one had the highest content of T.A.A. The taste-determinants such as theanine, aspartic acid, serine, glutamic acid and arginine in green tea liquor, occupied as much as $89.4{\sim}90.0%$ of T.A.A.s. Among these, theanine was more than 50%, Lightness and yellowness of green tea were increased with delay of pan-firing time, while green color appeared to be more distinct at 10 min. 1st pan -firing time than other treatments. Besides, it gained the highest score of sensory evaluation among them. These above results suggested that 10 min. pan-fired green tea was considered to be the best level as pan-firing time of green tea processing.
The high pressure processing (HPP) is a technology which can preserve the quality of foods, such as the fresh taste, incense, texture, vitamin content, and so on, by minimizing the heating process. It does so by applying an instantaneous and uniform pressure that is the same as the water pressure that is 60 km deep in the sea. HPP is a technology that can inhibit food poisoning and spoilage caused by microorganisms and is currently an actively studied area. In this study, we investigated the effects of a high pressure treatment (0, 4, 6 min) on sliced ham, which is a typical meat product, at 600 MP a were tested for their effect on freshness. Moisture contents varied from 48 to 69%, salinity varied from 1.07 to 1.11%, and the pH decreased from 6.4~6.5 to 6.1~5.15. However, there was no difference between the control and treatment groups. General bacteria stored at $20^{\circ}C$ after hyper-pressure treatment were found to have no significant microorganisms in all groups until 4 weeks. but exceeded $10^5$ in control group and HPP 6 min treatment group from 5 weeks, At week 7, it was found to exceed $10^6$. The results indicate it was not possible to ingest food in the 4-and 6 minute treatment groups. Coliform was not observed in all groups despite observing for a total of 7 weeks at $20^{\circ}C$ weight test. VBN, a method used to determine the protein freshness of meat, showed a VBN value of less than 1 mg% until the fourth week and a value of 1 to 2 mg% after 5 weeks. The TBA was used as an index of the degree of fat acidosis in the meat tissues. The results showed it was below 0.18 mgMA / kg until the end of 7 weeks; this value was within the range for fresh meat, and there was no difference in treatment group. In this experiment, deformation of the packaging material did not occur and no swelling occurred due to the generation of gas. It is believed that the basic preservation effect was achieved only by blocking with the air due to the close contact of the packaging material.
From the previous studies, F-P-4 formula was found to be comparable to full fat dry milk in its nutritive value and feeding performance. However, an attempt was made in order to make sure whether or not any possibility might exist, by which further improvement of nutritive quality and simultaneous reduction of product costs may be achieved. Using F-P-4 as a control, modifications were made in new formulas, F-P-5, F-P-6 and F-P-7 by reducing FPC, eliminating yeast from the mixture, and by enriching with methionine as needed. In particular, F-P-7 is completely free of FPC, hydrogenated oil and yeast. Yet, levels of total protein and fat were kept equal to those of F-P-4 in all formulas. An animal feeding test for all formulas using 10 female rats per group for 8 weeks and an infant feeding trial for F-P-5 and F-P-6 with 5 of each female infants under age of one for one month were conducted along with F-P-4 as a control. Almost the same results were obtained with F-P-4, 5 and 6, but F-P-7 showed the lowest body weight gain. FER of F-P-5 and 6 was 0.20 as was with F-P-4, while that of F-P-7 was 0.16. Acceptability to infants was excellent; growth, appearance and biochemical data were normal. As an example F-P-4 packed in 0.04mm polyethylene bags was used for storage study at $25^{\circ}C$ and relative humidity of $65{\sim}85%$ for 8 months. Although viable bacterial counts and vitamin C contents were reduced, peroxide and TBA values were increased gradually during such storage. Since there are also significant changes in color and organoleptic quality, the expected shelf life under the given conditions is considered to be about 2 months and thus further works are needed both on the product and packaging in order to improve the storage stability. Either elimination of yeast form F-P-4, that is F-P-5, or partial replacement of FPC with methionine, that is F-P-6 may well reduce material costs about 10%. Considering blending process of ingredients, F-P-5 is thus found to be the best formula developed. While F-P-7 free of FPC is inferior in its nutritive quality than that of others, but significantly superior than of rice. Furthermore, the material cost of the product can be reduced about 20% from that of F-P-4. And thus this vegetable blend is considered to be useful as a low cost supplementary food mixture for growing children.
Kim, S.H.;Chung, C.E.;Lee, H.K.;Cho, S.S.;Lee, Y.W.
Journal of Nutrition and Health
/
v.7
no.2
/
pp.53-63
/
1974
For the elucidation of the nutritional status of residences of apartments located in various areas in Seoul city, the food and nutrition survey was undertaken by the graduate students from Department of Food & Nutrition, Ewha Womans University in 1973. The socioeconomic stratification was mainly considered for the selection of sample apartments included in this study. Hangang Mansion, KIST, Munwhachon & Bukahyun apts were selected in this respect. A. Common living circumstances. Through the questionaries, author concluded nutritional concept on everyday food life as follows; 1. Higher income seems less effective in everyday food life on the nutritional view point than higher education does. 2. It needs to be urgently improved to be accustomed to use exact measuring concept of foods when they cook. 3. It needs to be improved to serve meals for individual portion at meal table, because the portion control at meal table will effect to national food policy. B. Nutrition Survey. Average daily calroie intake was the highest in Hangang Mansion and lowest in Bukahyun apt., in accordance with their economic living standard, but most of their calorie intakes were lower than the R.D.A. (3000ca1 for male, 2200 Cal for female). But the composition ratio of the total calorie intake was near to the ideal, carbohydrate 60%, protein 15%, fat 25%. Although there were differences in their economic living situations in urban area, most people ingested relatively good quality and large amounts of protein and fat. Vitamin A and Niacine intake exceeded the R.D.A., but the intake of Ca, Thiamine, Riboflavin, Ascorbic Acid were far less than that of R.D.A. C. food Intake. Amounts of total daily food intake were highest in Bukahyun apt. and lowest in Hangang Mansion. These showed adverse aspects to the total calorie intakes and their income levels. The ratio of cereals, $40%{\sim}50%$ of the total food intake, was higher than any other kinds of foods in all apartments. Among the other foods except cereals, there represented the highest level of meats in Hangang Mansion and KIST apt., while intake of Kimchies were highest in Munwhachon and Bukahyun apt. In the case of vegetables and fruits intake, the ratio of them in Hangang Mansion and KIST apt. were high, on the other hand the ratio of starchy roots appeared lowest in Hangang Mansion. For the main sources of protein, meats were ingested in Hangang Mansion and KIST apt., meats and fishery were used in Munwhachon apt., and beans were eaten highly in their meals in Bukahyun apt. These food contents and distributions showed the significant differences not only their economic classes but also regional characteristics.
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