• KSBB Journal
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• v.17 no.4
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• pp.350-356
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• 2002

Low density polyethylene(LDPE) film was fabricated with the addition of benzoic acid, or/and JP which contained water-soluble silica adsorbed a natural antimicrobial compounds. The used antimicrobial compounds were isolated from culture broths of methylotropic actinomycetes strains MO-16 and MO-17 which was newly isolated from soils. An antimicrobial compound retained antimicrobial activity after heat treatment at 121$^{\circ}C$ for 5 min. JP, which obtained from Japan as a antimicrobial agent, showed antimicrobial activity in the concentration of 100 mg/mL. The silica LDPE film revealed the growth inhibition of total aerobic bacteria in packaged minced pork compared with commercial film and of E. coil on a contained agar plate. In the storage testing of various packaged foods at room temperature for 30 days, the film showed excellent preservation compared with commercial film in case of small tomato and Agaricus bisporus.

• Journal of the Korean Society of Food Science and Nutrition
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• v.32 no.8
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• pp.1227-1232
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• 2003

The solvent extracts of the aerial part of Artemisia capillaris extracted by using several solvents with different polarities were prepared and their antimicrobial activities were examined. The antimicrobial activities and cell growth inhibitions were investigated to each strain with the different concentrations of the aerial part of Artemisia capillaris Acetone extract showed the highest antimicrobial activity. Minimum inhibitory concentrations (MIC) for each strain were appeared to 20 mg/mL at Staphylococcus aureus and Bacillus subtilis, 40 mg/mL at Vibrio parahaemolyticus, and 80 mg/mL at Salmonella tyhimurium. The cell growth inhibitions were shown on Staphylococcus aureus, Bacillus subtilis, Vibrio parahaemolyticus, and Salmonella typhimurium for 48 hours. The acetone extract was further fractionated sequentially with hexane, chloroform, ethyl acetate, and butanol for purifying crude acetone extract. The solvent fraction of hexane, chloroform, ethyl acetate, and butanol showed the different antimicrobial activity, respectively.

• KSBB Journal
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• v.15 no.6
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• pp.600-604
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• 2000

Low density polyethylene(LDPE) film was fabricated with the addition of synthetic ceramic which contained a natural antimicrobial agents. The antimicrobial agents used were isolated from culture broths of methylotropic actinomycetes strains MO-16 and MO-17, and Streptomyces sp. No. 31, which was newly isolated from soils as an antifungal agent. Four-day old culture broth of Streptomyces sp. No. 31 showed strong antifungal activity against Aspergilus niger, a test strain, and retained antimicrobial activity after heat treatment at $121^{\circ}C$ for 15 min. The ceramic LDPE film reduced the growth of total aerobic bacteria in packaged minced pork compared with commercial film. The film revealed a 40 to 50% growth inhibition of E. coli on a contained agar plate. In the storage testing of various packaged foods at room temperature for 30 days, the ceramic LDPE film showed excellent preservation compared with commercial film.

• Korean Journal of Food Science and Technology
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• v.53 no.2
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• pp.160-164
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• 2021

This study investigated various physiological activities to examine the applicability of the functional materials of Allium tuberosum root extract. The A. tuberosum root extract showed a low cytotoxicity against murine melanoma B16F10 cells. It also showed high DPPH radical scavenging activity (ID50, 6.2 ㎍/mL), inhibited tyrosinase activity (ID50, 115.4 ㎍/mL), and decreased melanin content (ID50, 31.5 ㎍/mL). Treatment of B16F10 cells with A. tuberosum root extract suppressed the protein expression of tyrosinase in a dose-dependent manner. These findings suggest that A. tuberosum root extract inhibits melanin synthesis by suppressing intracellular tyrosinase expression. Additionally, A. tuberosum root extract inhibited elastase with an ID50 value of 145.1 ㎍/mL and contained isoquercitrin. These results indicate that A. tuberosum root extract is an appropriate natural material.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2020.08a
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• pp.103-103
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• 2020

눈개승마 (Aruncus dioicus)는 장미과(Rosaceae) 눈개승마속(Aruncus)에 속하는 다년생 초본식물로 울릉도에서 자생하는 잎줄기 채소이다. 독특한 향기가 특징이며, 인삼맛, 두릅맛, 고기맛이 나는 산채로 세가지 맛이 난다고 하여 예로부터 삼나물로도 불러왔다. 눈개승마에는 caffeic acid, 1-O-Caffeoyl-β-D-glucopyranose 등의 항산화 성분이 다량 함유되어 있으며, 전초는 해독, 편도선염에 효과가 있어 약용으로 쓰이고 어린순은 탄수화물과 무기물 함량이 풍부하다. 비지는 대두를 이용하여 두부를 제조하는 과정에서 발생되는 것으로서 대두로부터 수용성 단백질이 추출되었지만 나머지 약 23%의 단백질, 57%의 식이섬유와 이소플라본 등의 유용한 성분을 다량 포함하고 있다. 또한 비지의 단백질은 다른 식품에는 부족한 황 함유 아미노산과 리신의 함량이 비교적 많고, 두부에 거의 없는 식이섬유가 다량 함유된 고 식이섬유 소재이다. 그리하여, 이러한 콩비지를 고부가가치 식품 소재로 활용하기 위해 건조 미세분말 비지를 제조하고, 이를 산채와의 혼합 가공을 통한 기능증진 효과를 연구하였다. 일반적으로 산채는 쓴맛 제거와 보관성 증진을 위해 데침공정을 주로 하나 산채를 물에 데칠 경우 산채의 유용성분이 대부분 손실된다. 눈개승마의 경우 유용성분이 17.25%, 그 중 폴리페놀 성분이 약 90% 손실된다. 본 연구에서는 기존의 데침공정 대신 찜공정을 이용하여 산채의 유용성분을 보존하고 콩비지를 첨가하여 산채 유용성분의 생이용성 증진 효과를 연구하였다. 눈개승마를 콩비지와 혼합하여 고온고압 가공함으로써 산채의 쓴맛을 줄이고 보관성을 높이는 동시에 눈개승마 폴리페놀의 단량체화를 통해 눈개승마 단독가공에 비하여, 단량체 비율이 약 100~200배 증가하는 것을 확인하였다. 본 연구를 통하여 콩비지의 고부가가치 소재로의 가능성을 확인하였을 뿐만 아니라 산채의 다이어트·건강기능식품 소재로의 산업화에도 기여할 수 있을 것으로 기대된다.

• Journal of Food Hygiene and Safety
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• v.25 no.1
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• pp.73-78
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• 2010

This research was conducted to assess applicability of photostimulated luminescence (PSL) and Thermoluminescence (TL) methods for investigation of infant and young children products, nut, seasoned dried fish, spice, dried fruits, fruit & vegetable, grain and marine products, which are not approved for irradiation in Korea. PSL results show that the photon counts of non-irradiated samples were lower than 700, while those of irradiated samples were higher than 700. In TL measurement, TL ratio of irradiated samples were higher than 0.1 or ones can decrease below 0.1 whereas the temperature range of TL Glow curve was between $150{\sim}250^{\circ}C$. Monitoring result about 8 class of 325 not approved to irradiated foods, photon counts of samples were less than 700, and after re-irradiation TL Ratio ($TL_1/TL_2$) through re-irradiation step at 1 kGy were higher than 0.1 for the all samples. Therefore, these results suggested that PSL and TL measurements were useful detection methods for 8 class food products not approved to irradiation in Korea and all sample (325 cases) were not irradiated when we analysed by PSL and TL methods.

• Microbiology and Biotechnology Letters
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• v.30 no.3
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• pp.270-281
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• 2002

The growth of Enterobacteria, Lactobacillus acidophilus and L. plantarum was promoted by natural products themselves bearing antioxidative capacity and combined two, three and four kinds of them.1. acidophilus was promoted by Paeonia japonica, Acori graminei rhizoma, Aurantii nobilis pericarpium, alone, and two mixed combinations were composed of Acori graminei rhizoma and Cinnamomi cortex, Aurantii nobilis pericarpium and Puerariae radix, and three mixed combinations were formed with Cimicifugae rhi- zoma, Cinnamomi cortex and Glycyrrhizae radix, and four mixed combinations were made up Glycyrrhizae radix, Theae folium, Scutellaria baicalensis george and Cinnamomi cortex. There four combination promoted growth of 1. acidophilus with 1.3 times than that of control, and their antioxidative capacity also higher than that off times, the ratio of elimination of hydroxyl radical was more than 70% in dilution rate of 100 times. In the case of 1. plantarum was premoted by Corm fructus, Nelumbo nuclfera gaertner Sophorae flos, alone, and two mixed combinations were organized with Schizandrae Iructus and Theae folium, Paeonia japonica and Epimedii herba, and three mixed combinations were combined with Corni fructus and Theae folium and Paeonia japonica, Corni fructus and Coptidis rhizoma and Schieandrae fructus, and four mixed combinations were composed of Corm fructus, Theae folium, Coptidis rhizoma, Scutellaria baicalensis george, and Corm fructus, Schizandrae fructus, Paeonia japonica, Theae folium. These four combinations assisted growth of 1. plantarum with 1.5 times than that of control, and their antioxidative capacity also higher than that of 4-5 times, the ratio of elimination of hydroxyl radical was more than 75% in dilution rate of 100 times. As these combinations of natural products could activate some parts of body, they might be applied pharmaceuitcal sources, functional foods, and expected to fermentative beverages.

• Journal of Convergence for Information Technology
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• v.9 no.12
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• pp.286-293
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• 2019

In this study, four types of retinol, retinyl palmitate, adenocin, and polytoxylate-dretinamide, which are the ingredients of the Ministry of Food and Drug Safety Notice, included in the study. also we looked at trends in research on Sciadopitys verticillata, Prunella vulgaris, Celosia cristata L., Brazilin, Persicaria hydropiper, Astragalus membranaceus Bunge, Forsythiae Fructus, Lithospermum root, Rheum undulatum L. and Cistanche deserticola Y. C. Ma a natural material that has the efficacy of antioxidant aging. The anti-aging study so far has been found to be centered mainly on collagen production and elastase synthesis inhibition mechanisms. However, given that the aging process of the skin is caused by various ageing processes, it is believed that anti-aging studies using safe and effective natural materials that can help the skin age with various mechanisms should be conducted.

• Journal of the Korean Society of Food Science and Nutrition
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• v.40 no.7
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• pp.1053-1062
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• 2011

Reactive oxygen species (ROS), including singlet oxygen (${O_2}^1$), superoxide anion radical ($O_2{\cdot}^-$), hydroxyl radical ($HO{\cdot}$), peroxyl radical ($ROO{\cdot}$), hydrogen peroxide ($H_2O_2$), and hypochlorous (HOCl), are generated as byproducts of normal cellular metabolism. ROS induce damage to many biological molecules, such as lipids, proteins, carbohydrates, and DNA. It is widely believed that some degenerative diseases caused by ROS can be prevented by the high intake of fruits and vegetables due to their antioxidant activities. Recently, research on natural antioxidants has become increasingly active in various fields. Several assays have been developed to measure the total antioxidant capacity of antioxidants in fruits and vegetables in vitro. These assays include those for DPPH radical scavenging activity, SOD-like activity, total polyphenol content, oxygen radical absorbance capacity, reducing power, trolox equivalent antioxidant capacity (ABTS assay), single-cell gel electrophoresis (comet assay), and a cellular antioxidant activity assay. Because different antioxidant compounds may act through different mechanisms in vitro, no single assay can fully evaluate the total antioxidant capacity of foods. Due to the complexity of the composition of foods, it is important to be able to measure antioxidant activity using biologically relevant assays. In this review, recently used assays were selected for extended discussion, including a comparison of the advantages and disadvantages of each assay and their application to fruits and vegetables.

• Food Science and Preservation
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• v.15 no.3
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• pp.340-346
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• 2008

This study investigated the microbial safety of apple snails and intermediate-moisture-content apple snail products subjected to various treatments, according counts of total bacteria, Escherichia coli, mold and yeast during storage at 4C Heating of raw apple snails at 95C for 5 min increased the storage period in relation to total bacteria, E. coli, mold and yeast-cell growth. Addition of 10% NaCl and 50% vinegar increased the microbial safety of apple snails. Microorganisms were not detected for 14 weeks in vacuum-packaged intermediate-moisture-content apple snail products stored at either 4C or 30C. These results suggest that heat treatment of raw apple snails, soaking in 10% NaCl and 50% vinegar solutions, and vacuum-packaging increases the shelf-life and microbial safety of apple snail products.