The repeated use of biocidal products, including household insecticides and disinfectants, has led people to seek safer alternatives, such as light traps, ultrasound generators, or repellent lamps. By appearances, these physical/non-chemical alternatives seem appealing to many consumers and are gaining more attention. However, unlike biocidal products, these alternatives are not subject to mandatory approval and registration processes, and no standards for efficacy and safety are in place. Given the increasing numbers of insect traps on the market, there is an urgent need to investigate their efficacy. In the present study, we examined the attraction activity of ten commercially available insect trap products. They varied in size, structure, trapping methods (fan or sticky pad), and attractants. Their efficacies were assessed under both laboratory condition (1.8m x 1.8m x 1.8m) and semi-field room condition (4m x 6m x 2m). Ul*****APTM demonstrated the highest capture rate (%), leading us to further study the role of its attractant. Notably, the capture rate increased by 28.9% when the CO2 attractant was used, displaying statistical differences (P = 0.032). For practical application in the field, consumer acceptance and satisfaction were monitored using 20 participants. The potential of insect traps as viable alternatives to biocidal products is discussed.

알칼리 수전해용 격막으로 사용가능성을 평가하기 위해 5종류의 상용 음이온교환막의 열적안정성, 이온전도도, 내구성을 평가하였다. TGA (thermo-gravimetric analysis)로 분석한 열적안정성은 FAAM-PK-75와 FAAM-40 막이 다른 3종류의 AEM, AHO, AHA 막과 비교하여 좋은 성능을 보였다. 25°C와 80°C, 7 M KOH 수용액에서의 이온전도도는 AEM막이 다른 막과 비교하여 약 4~17배 높은 값을 보였다. 25°C, 7 M KOH 수용액에서 측정한 내구성은 FAAM-PK-75막이 다른 막과 비교하여 안정하였다.

We investigated the cytotoxic potential of three different commercially available absorbent feminine hygiene products and one transdermal patch using direct contact and extract exposure methods. Two different cell lines were used – mouse fibroblast L929 and normal human skin fibroblast CCD-986sk cell lines. The test samples were extracted using three different methods in accordance to International Organization for Standardization (ISO). Viability of cells was analyzed using MTT assay and morphology of the cells were also observed using phase contrast microscopy. Overall, the direct contact method using L929 cells showed that all the test samples had no toxic effect when exposed to extracts for 1 h. For the exposure method, no toxic effect was observed in both L929 and CCD986sk cells incubated with all the test samples regardless of the extraction methods used.

Quality characteristics of commercially available soybean and mung-bean flours in Korea were evaluated relative to product information such as bean content, price, chromaticity, proximate composition, water binding capacity, swelling power and solubility. Origin of raw materials was 23 in domestic products and 19 in imported products. The price of the product was 3.48 times more for raw soybean flour, 3.34 times more for fried soybean flour, and 3.47 times more for mung bean flour compared to imported soybean. In the domestic products, the lightness of raw soybean flour was higher than roasted soybean flour. The redness and yellowness of roasted soybean flour were higher than raw soybean flour. Moisture content of raw soybean flour was higher than roasted soybean flour, and crude fat, crude protein and carbohydrate content were higher in imported soybean flour. Ash and crude protein contents of mung bean were slightly higher than imported products. Water binding capacity of roasted soybean flour in domestic products was higher than raw soy flour, and there was no significant difference in solubility and swelling power. Correlation between quality characteristics of commercially available soybean and mung-bean flours products was found to be highly significant among measured items, except for solubility.

This study was undertaken to evaluate the quality characteristics and antioxidant characteristics of commercially available mixed grains in Korea. The quality characteristics of mixed grain products studied were the mixing ratio, water binding capacity, water solubility, swelling power, and pasting characteristics. The antioxidant characteristics assessed the total polyphenol, flavonoid contents, DPPH and ABTS radical scavenging activities. The mixing ratio of commercially available mixed grain products consisted of 5~25 kinds of grains, with maximum products containing 15-grain products. The water binding capacity, water solubility, and swelling power in commercially available mixed grain products were 99.83~122.83%, 6.91~39.26% and 7.76~86.92%, respectively. The peak, trough, breakdown, final and setback viscosity were 31.53±20.17 RVU, 25.24±13.22 RVU, 6.29±7.43 RVU, 50.27±25.84 RVU and 18.74±8.68 RVU, respectively. Total polyphenol and flavonoid contents were 817.14~2,524.29 μg GAE/g and 06.36~1,099.09 μg CE/g, respectively. The DPPH and ABTS radical scavenging activities were 31.91~151.70 mg TE/100 g and 28.09~119.92 mg TE/100 g, respectively. Products with high phenol content and radical scavenging activity were found to contain greater proportion of brown rice, colored rice, barley and soybean.

This study was undertaken to evaluate the quality characteristics and antioxidant characteristics of commercially available mixed grains in Korea. The quality characteristics of mixed grain products studied were the mixing ratio, water binding capacity, water solubility, swelling power, and pasting characteristics. The antioxidant characteristics assessed the total polyphenol, flavonoid contents, DPPH and ABTS radical scavenging activities. The mixing ratio of commercially available mixed grain products consisted of 5~25 kinds of grains, with maximum products containing 15-grain products. The water binding capacity, water solubility, and swelling power in commercially available mixed grain products were 99.83~122.83%, 6.91~39.26% and 7.76~86.92%, respectively. The peak, trough, breakdown, final and setback viscosity were 31.53±20.17 RVU, 25.24±13.22 RVU, 6.29±7.43 RVU, 50.27±25.84 RVU and 18.74±8.68 RVU, respectively. Total polyphenol and flavonoid contents were 817.14~2,524.29 μg GAE/g and 06.36~1,099.09 μg CE/g, respectively. The DPPH and ABTS radical scavenging activities were 31.91~151.70 mg TE/100 g and 28.09~119.92 mg TE/100 g, respectively. Products with high phenol content and radical scavenging activity were found to contain greater proportion of brown rice, colored rice, barley and soybean.

국내 시판 중인 선식의 유통 안전성 확보를 위한 기초기반연구로 대기압 플라즈마 처리한 선식의 품질 특성 평가를 진행하였다. 본 연구에서 이용한 플라즈마는 컨테이너형 유전격벽 플라즈마로 방전 가스는 공기를 활용하여 0, 5, 10 및 20분 처리하였고 미생물 감균효과, 색도, pH관능평가를 진행하였다. 일반 호기성 미생물 분석 결과 20분 처리 시 약 1.70 log CFU/g 감소하였으며 B. cereus, B. subtilis 및 E. coli O157:H7을 이용한 접종 시험 결과 각각 2.20, 2.22 및 2.50 log CFU/g 감소하였다. 색도 측정결과 플라즈마 처리에 의해 명도 값은 증가하였으나 적색도 및 황색도는 감소하였다. 플라즈마 처리에 의한 선식의 pH측정 결과 처리시간에 따라 감소하는 경향을 보였다. 하지만 플라즈마 처리에 의해 단백질 지질산화가 일어나 관능 품질이 저하되는 경향을 보였다. 따라서 공기로 방전된 대기압 플라즈마 기술은 선식의 품질안전성을 개선할 수 있으나, 관능적 품질 특성 개선을 위한 후속연구가 필요하다고 판단된다.

Salined water electrolysis is an electrochemical reaction to produce chlorine gas and sodium hydroxide as major products from salined water. Perfluorinated sulfonic acid (PFSA) ionomers and their derivatives have been usually used as polymeric electrolytes with high sodium ion selectivity and barrier property to chlorine and hydrogen gases. In spite of their industrial importance, there is little information on the relationship of their chemical features and electrochemical performances. In this study, fundamental characteristics of commercially available PFSA family materials are compared each other. Their electrochemical performances are evaluated in the same salined water electrolysis cell. The obtained results are expected to provide membrane material design factors for low energy-consuming salined water electrolysis.

본 연구에서는 몇 가지 벼 품종(삼광, 미광, 칠보, 청해진미 및 조운)의 도정 부산물인 미강에 대한 추출 온도에 따른 70% 에탄올 추출물의 항산화 성분(polyphenol, flavonoid)과 항산화 활성(DPPH radical 소거능, ABTS radical 소거능, 환원력)을 비교?분석하여 기능적 가치를 평가함으로써 이용 가능성을 살펴보고자 하였다. 추출 온도에 따른 미강의 항산화 성분을 측정한 결과, 총 polyphenol 함량에서는 추출 온도가 높을수록 다소 증가하는 경향을 나타낸 반면, 총 flavonoid 함량은 추출 온도에 따른 차이는 보이지 않았다. 항산화 활성측정 결과, DPPH radical 소거능을 제외한 총 항산화력(ABTS radical 소거능)과 환원력은 온도가 높아짐에 따라 유의적으로 증가하는 경향을 나타내었다. 또한 조사되어진 품종들의 미강 최적 추출조건은 청해진미로 25℃에서 추출하였을 경우에 가장 우수한 항산화 효과를 얻을 수가 있었다. 이에 본 연구결과를 토대로 최적의 기능성 성분을 활용할 수 있는 추출 온도를 제공함으로써 도정 부산물의 최적 추출조건 및 품종별 쌀의 기초 자료를 제공할 수 있을 것이라 사료된다.

본 연구에서는 국내에서 시판되고 있는 19종 식초 및 식초 음료에 대해 항산화활성과 항산화성분의 함량을 측정함으로써 그 상관관계를 알아보고자 하였다. 총 폴리페놀 함량은 발사믹 식초가 372.53mg/100mL로 가장 높았으며, 주로 음료용 식초가 조리용 식초보다 높은 함량을 나타내었다. 또한 총 플라보노이드 함량에서도 발사믹 식초가 114.40mg/100mL로 가장 높았으며, 주로 음료용 식초가 조리용 식초보다 높은 함량을 나타낸 반면에, 유기산 함량에서는 빙초산이 가장 높은 수치를 보였다. 본 연구에서 식초의 유기산 함량과 항산화 성분·활성은 상관관계가 없었으며 이는 식초의 유기산이 항산화 활성에는 관여하지 않음을 알 수 있었다. 본 연구에서 항산화 활성이 가장 높게 나타난 식초는 발사믹 식초였으며, 주로 음료용식초가 조리용식초보다 높게 나타났으며, 식초의 항산화 활성에 주로 기여하는 물질은 폴리페놀 화합물로 생각된다.

어유에 catechin, 로즈마리 추출물 (Antox1, Antox2, Antox3), carotene, 녹차 추출물 (Gtox) 등을 첨가하여 각각의 항산화력을 rancimat을 이용하여 측정하였으며, synergist외의 상승효과를 측정하였다. 사용된 항산화제 6종 중에서 catechin 500ppm을 첨가한 시료의 induction periods time이 4.35 hr로 control의 0.65 hr보다 3.7 hr의 차이를 보이면서 크게