• 한국약용작물학회지
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• 제24권3호
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• pp.183-190
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• 2016

Background: This study determined the effects of mulching, an environment friendly organic cultivation method, on antioxidant compound contents and growth in Codonopsis lanceolata, commonly known as Deodeok. Methods and Results: C. lanceolata was treated by mulching with several different methods (a non-woven fabric, biodegradable film, or rice husks) and also treated with hand weeding. A non-treatment plot was used as a control. The growth and levels of weed control in C. lanceolata were better in plants cultivated under mulching treatments (non-woven fabric, biodegradable film, and rice husks) than in those under non-mulching treatments (hand weeding and non-treatment). The contents of antioxidant compounds, such as total flavonoids, phenolics, and anthocyanins, were highest under the biodegradable film treatment, followed by the non-woven fabric treatment, rice husks treatment hand weeding, and non-treatment. There were identifiable differences in DPPH and ABTS activity in comparison to antioxidant compound content by solvent fractions. Mulching treatments resulted in higher DPPH scavenging activity in water and ethyl ether fractions and ABTS scavenging activity in n-butanol fractions than in other fractions, as opposed to hand weeding and non-treatment groups, although total activity of DPPH and ABTS did not increase with mulching treatments. Conclusions: Mulching C. lanceolata with biodegradable film and non-woven fabric is an effective method for improving plant growth and inhibiting the occurrence of weeds as well as for increasing antioxidant compound content and altering antioxidant activity.

• 대한의생명과학회지
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• 제28권1호
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• pp.50-57
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• 2022

In this study, we tried to examine the possibility of developing a dental product such as tooth decay prevention and oral hygiene by manufacturing a natural polymer film for oral use. Natural polymer films were prepared from shark byproduct extract (SBE) and gellan gum (GG). As an antibacterial substance, the antibacterial activity of green tea extract against tooth decay-causing bacteria was measured. An film was prepared by adding green tea extract to the composition of SBE and GG. The mechanical, solubility, moisture content and antibacterial function of the prepared film were investigated in detail. Also, the incorporation of GTE into the SBE/GG film improved the physical performance of the film. Increasing the content of GTE improved the antioxidant and antibacterial properties of the film. Formulation of antimicrobial SBE/GG film containing green tea extract was established and these results evidently showed potential for cavity prevention products application.

• 한국포장학회지
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• 제26권1호
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• pp.19-23
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• 2020

Al-laminated packaging film incorporating ascorbic acid or tocopherol at inner food contact layer was tested in the potential to improve antioxidative preservation of powdered infant formula under CO₂-enriched atmosphere. Product of 200 g was packaged with the packaging film containing 0.3% antioxidant in sealant layer of low density polyethylene and stored at 30℃ for 286 days with periodic measurement of package atmosphere and product's quality attributes. The CO₂-flushed package resulted in shrinkage of tight contact between the product and the film not allowing gas sampling of package atmosphere after 140 days. Package of tocopherol-incorporated film allowed some ingress of oxygen after 112 days presumably due to its weakening of heat-seal area. The increased oxygen concentration in the tocopherol-added film package led to the concomitant increase of peroxide value, an index of lipid oxidation. On the other hand, packaging of ascorbic acid-added film pouch could suppress lipid oxidation marginally in consistent manner compared to control package without any antioxidant.

• 한국식품영양과학회지
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• 제45권5호
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• pp.778-781
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• 2016

본 연구에서는 폐기되는 성게 껍질을 이용한 생분해성 필름소재를 개발하고자 gelatin을 첨가한 복합필름 및 항산화, 항균성을 부여하기 위해 아까시 꽃 추출물(RFE)을 첨가한 필름을 제조하였다. 그 결과 gelatin 비율이 증가함에 따라 성게 껍질 필름의 인장강도가 증가하였고 신장률이 감소하였으며, 성게 껍질과 gelatin을 8:2 비율로 첨가하였을 때 최적의 물성을 보였다. 또한, 필름에 RFE를 첨가함에 따라 인장강도는 감소하였으나 신장률과 필름 투습도는 증가하였다. RFE 함유 성게 껍질 필름의 ABTS, DPPH 라디칼 소거능 측정과 디스크 확산법을 이용하여 항산화 및 항균 능력을 측정하였는데, RFE 농도가 증가함에 따라 항산화, 항균 능력이 향상하였다. 따라서 본 연구 결과, RFE를 첨가한 생분해 성게 껍질 필름은 적절한 물성과 함께 항산화, 항균 능력이 있기에 가공식품의 저장성을 증대시킬 수 있는 기능성 포장 소재로의 활용이 가능하다고 판단된다.

• 한국식품영양과학회지
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• 제33권6호
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• pp.1063-1067
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• 2004

천연 항산화제인 녹차 추출물을 첨가하여 옥수수 단백 및 대두 단백 필름을 제조하여 물성을 측정하였고 이들 포장재를 사용하여 포장한 가공 식품의 지방 산패에 미치는 영향을 측정하기 위해 튀김 어묵을 대상으로 저장 실험을 하였다. 녹차 추출물을 함유한 필름의 경우 인장강도와 신장률은 감소하였으며 대두 단백 필름의 경우 녹차 추출물의 영향으로 Hunter b값이 증가하였으나 옥수수 단백 필름의 경우에는 감소하였다. 유지의 산패 측정을 위한 실험 결과, 저장 2일 후 H 어묵의 경우에는 녹차 추출물을 포함하고 있는 포장재로 포장한 것이 대조군에 비해서 옥수수 단백필름은 3.6 mg MDA/kg sample, 대두 단백필름은 3.6 mg MDA/kg sample, D 어묵의 경우 옥수수 단백필름은 1.6 mg MDA/kg sample, 대두 단백필름은 0.6 mg MDA/kg sample의 차이로 산화를 억제시키는 것으로 나타났다.

• Bulletin of the Korean Chemical Society
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• 제31권9호
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• pp.2557-2560
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• 2010

To assay for antioxidant capacity of natural products considered important in producing human health benefits, a practical and economical method using pellet techniques was developed. A standard visualizing reagent, 1,1diphenyl-2-picryl-hydrazyl (DPPH), was mixed with a water-miscible polyvinyl alcohol (PVA), serving as a solid phase support for the DPPH reagent. A DPPH pellet was prepared by dropping a small volume of the DPPH solution onto PET film, and drying in an oven. The PVA-based DPPH pellet was dissolved into water, in which the water-miscible PVA plays as a non-ionic surfactant to help the DPPH reagent to be dissolved into the solvent. Using the DPPH assay, the antioxidant capacity of water-soluble extracts of black soybean, barley, green tea, and green gram was examined. Among the natural products tested, green tea showed the highest antioxidant capacity. This PVA-based DPPH antioxidant assay can be further applied in the natural food, raw plant material, and health product inspection field.

• 대한의생명과학회지
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• 제26권4호
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• pp.360-367
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• 2020

Tuna skin byproduct extract (TSB) was used as a biocompatibility film base material, and its composite film with gellan gum (GG) was prepared. In addition, Pinus thunbergii cone extract (PTCE) was incorporated into the film to provide anti-oxidant and anti-bacteria activities. The tensile strength (TS) of the TSB/GG composite films increased with increasing GG content, whereas elongation at break (E) decreased. TSB/GG film at a ratio of 0.5:0.5 (w/w) showed the most desirable TS and E values. Based on scavenging free radical potentials and disc diffusion method results against growth of bacteria, antioxidant and anti-bacteria activities of films increased with increasing PTCE concentration. Accordingly, this study showed that TSB/GG could be used as a film material while the TSB/GG composite film containing PTCE can be utilized as functional packaging.

• Asian-Australasian Journal of Animal Sciences
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• 제33권9호
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• pp.1470-1476
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• 2020

Objective: This study was carried out to investigate physicochemical properties, and antioxidant and antimicrobial activities of low-fat sausages (LFSs) covered with sodium alginate (SA) film alone and with powder film (TSA-film) formed by cross-linking cherry tomato powder (CTP) and SA with calcium chloride (CaCl₂). Methods: Sausages covered with the biodegradable film were assessed based on the measurement of pH, color (L^⋆, a^⋆, b^⋆), proximate analysis, expressive moisture (EM), texture profile analysis, total plate counts (TPC), violet red bile, and 2-Thiobarbituric acid reactive substances (TBARS) during storage under refrigeration. LFSs wrapped with TSA-film were compared with those wrapped with SA-film and without film (control) during storage at 10℃ for 35 days. Results: The LFSs covered with the mixed film had lower pH, lightness (L^⋆), EM%, TBARS, and TPC, but lower yellowness (b^⋆) and hardness values than those wrapped with TSA-film alone. Conclusion: Lipid oxidation and microbial growth was retarded in sausages covered with biodegradable films, especially multiple films as compared to single film, thereby resulting in extended shelf-life of the LFSs.

• Journal of Applied Biological Chemistry
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• 제58권2호
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• pp.145-151
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• 2015

옥수수의 습식 분쇄 공정 중 나오는 부산물인 옥피로부터 옥피 단백질(CFP)을 추출하였다. 다양한 가소제와 가교제를 첨가하여 CFP 필름을 제조한 후, 필름의 물성을 측정하였다. 본 연구에서 사용된 가소제와 가교제 중, 2 g fructose와 0.03% cinnamaldehyde를 첨가한 필름이 가장 좋은 물성을 가졌다. 또한 여러 농도(0, 0.5, 1.0, 1.5%)의 녹차 추출물(GTE)을 첨가한 CFP 필름을 제조하였다. GTE의 농도가 증가함에 따라 CFP 필름의 인장강도, 수분 용해도, 불투명도는 증가하였고, 반면에 신장률과 필름의 수분투과도는 대조구에 비해 감소하였다. GTE 첨가한 CFP 필름의 항산화성은 DPPH 소거능으로 측정하였는데, GTE 농도가 증가함에 따라 증가하였다. 그리고 E. coli O157:H7, L. monocytogenes, S. aureus 에 대한 항균성 실험을 한 결과 또한 GTE 농도가 증가함에 따라 증가하였다. 따라서 본 연구 결과, GTE 첨가는 CFP 필름의 항산화, 항균효과를 가져다 준다고 판단된다.

• 한국자원식물학회지
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• 제30권1호
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• pp.29-37
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• 2017

본 연구는 유통현장에서 다양한 포장 형태로 이용되는 일당 귀 잎의 포장방법별 선도유지 효과를 구명하고자 하였다. 현장에서 이용되는 일당귀 잎의 1 kg 단위로 포장 형태를 골판지상자에 바로 일당귀 잎을 포장한 무처리를 대조구로 하여 $20{\mu}m$ HDPE 천공 필름, $20{\mu}m$ HDPE 천공 필름+파라핀왁스 코팅 종이와 같이 3가지로 분류하였다. $4^{\circ}C$ 저온에서 20일간 저장하고 20일 후 상온으로 옮겨 2일간 추가 유통하면서 중량감소율, 색도, 외관품위, 항산화활성과 총 플라보노이드 함량 변화를 조사하였다. 그 결과, 포장 형태에 따른 일당귀 잎의 중량 감소는 봉지 형태의 $20{\mu}m$ HDPE 천공 필름 포장과 $20{\mu}m$ HDPE 천공 필름+파라핀왁스 코팅 종이 포장에 의해 가장 적었으며 저장 중의 엽색, 외관 및 중량의 변화폭도 적어 상품성이 20일간 유지되었다. 대조구로 사용한 일반 골판지상자에 포장한 일당귀 잎은 저장 15일 째 상품성을 상실하였다. 항산화활성과 총 플라보노이드 함량은 $4^{\circ}C$에 20일간 저온저장 및 상온에 2일간 추가 유통하는 동안 $20{\mu}m$ HDPE 천공 필름+파라핀왁스 코팅종이 처리가 다른 처리에 비하여 높게 유지되어 생리활성 물질 함량 보존에 유효하였으며, 국내 유통현장에서 사용하기에 가장 적절한 포장방법으로 나타났다.