This study investigated the quality characteristics and antioxidant activities of wet noodles as well as their cooking properties following the addition of peanut sprout extract (PSE) and powder (PSP), which are known to contain a significant level of resveratrol. Wet noodles were prepared with 0, 2.5, 5, 7.5 and 10% PSE and PSP. Quality characteristics such as increasing volume of noodle, water ratio, turbidity of cooking water and color, texture, and sensory evaluation were then assessed. Additionally, the total resveratrol content in the cooked noodles was analyzed by HPLC and DPPH free radical scavenging capacity. As the amount of PSE and PSP increased, the L value of wet and cooked noodles significantly decreased, whereas the a and b values increased (p<0.001). The L value of cooked noodles was significantly lower compared to wet noodles (p<0.001) whereas the a and b values were higher. For the cutting intensity properties of the cooked noodles, hardness was reduced with increasing amounts of PSE (p<0.001), and was significantly increased in proportion to the amount of PSP (p<0.05). Meanwhile, springiness was not significantly different in all groups. Total resveratrol content and free radical scavenging activity significantly increased in proportion to the amounts of PSE and PSP (p<0.001), especially in noodles containing 5%, 7.5% and 10% PSE and PSP. Finally, sensory evaluation of PSE noodle revealed that color, flavour, taste were significantly decreased (p<0.05). But there was no difference in overall acceptance among cooked noodles with 2.5% to 5% PSE comparison to the control. Sensory characteristics in the PSP noodle showed similar results. In conclusion, these findings suggest that peanut sprout extract and powder could be potentially used as functional food ingredients. In addition, up to 5% PSE and PSP can be substituted for wheat flour.

은행 가공산업에서 부산물로 제거되는 은행 외종피의 활용성을 증대시키고자 다양한 생리활성에 미치는 열처리의 영향을 살펴보았다. 은행 외종피를 분리하여 130℃에서 2시간 열처리한 후 물, 70% 에탄올 및 80% 메탄올 추출물을 제조하여 생리활성변화를 살펴본 결과, ABTS와 DPPH 자유라디칼 소거활성은 80% 메탄올 추출물을 제외하고, 열처리 후 증가하는 경향을 보였으며, 물 추출물에서 각각 14.95 mg AAE/g과 7.36 mg TE/g으로 높게 나타났다. α-Glucosidase 저해 활성은 물 추출물을 제외하고 열처리 시 감소하는 경향을 보였으며, 열처리 전 80% 메탄올 추출물에서 98.66%로 가장 높게 나타났다. Angiotensin converting enzyme I 저해 활성은 추출물 간의 유의적인 차이가 없었으며(P>0.05), 열처리 후 모두 감소하였다. 산화질소 생성억제 활성은 열처리 시 증가하였으며, 물 추출물(200 μg/mL)이 12.33 μM로 LPS 처리구에 비해 산화질소 생성량을 72.39% 감소시켰다. 지방구 축적억제활성은 세포독성을 보이지 않는 농도에서 열처리 시 감소하였다. 유방암 세포주에 대한 항암 활성은 열처리 후 증가하는 경향을 보였다. 이상의 결과로부터 은행 외종피 추출물의 다양한 생리활성을 확인하였으며, 특히 열처리 후 항산화 활성과 유방암 세포주에 대한 증식억제 활성이 크게 증가하였으며, 추후 생리활성물질의 규명 연구가 필요하다고 판단된다.

본 연구에서는 저층 조적채움벽 철근콘크리트 골조 구조물의 내진보강 전과 후에 대하여 강제 진동 실험과 상시 진동 계측을 수행하였으며 시스템 식별과정을 통하여 구조물의 동특성을 구하고 해당 구조물과 유사한 동특성을 보이는 해석 모델을 만들었다. 시스템 식별 결과 댐퍼가 설치된 x방향의 감쇠비가 증가되었으며, 해석 모델과 비교한 결과 추가 설치된 부재들(전단벽과 댐퍼)의 유효 강성은 부재의 총단면 강성의 50%만이 발현되어 해당 부재들이 기존의 구조물이나 부재와 완전히 일체화되지는 않음을 알 수 있었다. 또한, 추가 설치된 기초의 y방향 구속조건을 핀으로 하여야 동특성을 일치시킬 수 있었는데, 이는 새로운 기초가 설치되며 해당 지질의 특성이 변화되었기 때문으로 보인다.

본 논문은 넓은 보의 전단강도를 대상으로 한 실험적 평가에 대해 기술하였다. 본 논문의 실험을 통해 넓은 보에 횡방향 단면에서 GFRP 판의 보강개수와 종방향 전단보강 간격, 그리고 유효깊이가 전단강도에 끼치는 영향에 관하여 연구하였다. 총 7개의 시험체에 유공형 GFRP 판 형태로 전단보강재를 보강하여 전단성능 실험을 실시하였다. 본 논문에 기재된 전단보강재는 유공형 판 형태로 제작되어 타설 시 콘크리트의 유동성을 증가시켜 보강재와 콘크리트의 부착력을 향상시켰다. 7개 시험체의 주 변수로는 전단보강재의 횡방향 단면에 대한 판의 보강개수와 종방향 전단보강 간격, 그리고 유효깊이로 정하였다. 시험체의 균열 및 파괴 양상, 변형률과 전단강도비를 분석하였다. GFRP판으로 전단보강된 넓은 보의 전단강도는 ACI 318-11 기준으로 산정되었다. 실험의 결과를 통해 유공형 GFRP 판이 전단보강재로서 넓은 보에 효과적으로 적용됨을 확인하였다.

ZnO micro/nanocrystals at large scale were synthesized through the thermal evaporation of Al-Zn mixtures under air atmosphere. The effect of synthetic temperature and time on the morphology of the micro/nanocrystals was examined. It was found that the temperature and time affected the morphology of the ZnO crystals. At temperatures below 900 oC, no crystals were synthesized. At a temperature of 1000 oC, ZnO crystals with a rod shape were synthesized. With an increase in temperature from 1000 oC to 1100 oC, the morphology of the crystals changed from rod shape to wire and granular shapes. As the time increased from 2 h to 3 h at 1000 oC, tetrapod-shaped ZnO crystals started to form. XRD patterns showed that the ZnO crystals had a hexagonal wurtzite structure. EDX analysis revealed that the ZnO crystals had high purity. It is believed that the ZnO nanowires were grown via a vapor-solid mechanism because no catalyst particles were observed at the tips of the micro/nanocrystals in the SEM images.

본 논문에서는 유공형 강판의 횡방향 보강간격에 따른 넓은 보의 전단성능을 실험적으로 평가하기 위하여 횡방향 전단보강 간격과 넓은 보의 유효깊이를 변수로 고려하였다. 시험체는 총 8개로 유공형 강판으로 전단보강한 시험체가 5개, 무보강 시험체가 3개이다. 균열 및 파괴유형, 변형률과 하중-변위 곡선을 분석하였다. 유공형 전단보강재의 전단강도 기여분을 분석하고, 횡방향 전단보강의 최대간격을 제안하였다. 횡방향 전단보강 개수가 2개인 시험체에 비해 3개인 시험체에서 전단강도가 크게 나타났으며 유효깊이가 증가할수록 전단강도가 크게 나타났다.

In this study, material tests were performed on the masonry specimens constructed with bricks and mortar used in Korea. The specimens included two types of thickness(0.5B and 1.0B) and physical conditions (good and poor). It was shown that 1.0B specimens have 3.2~1.8 times larger shear strength than 0.5B specimens and shear strength of specimens in poor condition was 66%~38% of those in good condition. Average shear stress of masonry-infills was calculated from previous experimental studies, and relationships with failure mode, material strength of masonry, aspect ratio, and frame-to-infill strength ratio were investigated. In addition, the effects of masonry strength on the seismic performance of a masonry-infilled frame was studied using a simple example building. It can be seen that the obtained average shear stress were considerably higher than the default masonry shear strength recommended by the ASCE 41, and low values the strength of masonry does not guarantee conservative evaluation results due to the early shear failure of frame members.

The study aims at quantifying the effect of nano technology in the fields of economics and social aspects by using the methodology of system dynamics. A case study which using selenium oxide nanoparticles as additive agent in order to enhance fuel efficiency was selected as an example of nano technology in economic and societal benefits. Additionally, models for exhaust gas from combustion of fuel (diesel) and related issues are developed to evaluate real-time assessment of the effect of nano technology. It was found that the selenium oxide nanoparticles increase fuel efficiency, and it also affects on the amount of exhaust gas and the respiratory disease related issues. The results of this study which give quantitative value for the effect of nano technology can be used as objective references in development of national policy.

It is well known that smoking generates harmful air pollutants. With smoking in buildings as well as in the streets prohibited, the need for smoking rooms has emerged. In this study, particle and CO contamination in a 63.6 m3 smoking room was experimentally investigated using Korean tobacco. Tobacco smoking was artificially simulated using a smoking machine. The number and size distribution of particles ranging from 10-420 nm and 0.25-32 μm were measured using a Nanoscan (TSI model 3910) and a portable aerosol spectrometer (Grimm model 1.109), respectively. CO concentration was also monitored using an IAQ monitor (Graywolf IAQ-Xtra 610). Four tobaccos were simultaneously smoked in each experiment, and the experiment was repeated four times. Maximum CO concentrations of 7-10 ppm were observed and high concentrations of particles (176,000-1,115,000 particles/cm3 for 10-420 nm, 3,700-5,200 particles/cm3 for 0.25-32 μm) were also monitored. The dominant size of tobacco particles was about 100 nm in diameter.

팽이버섯 신품종 ‘흑향’은 ‘갈뫼’와 수집 야생균주인 ‘CBMFV-10’으로부터 분리한 단포자를 교배함으로써 육성된 품종으로, 갓 색이 진한 갈색을 나타내며, 재배기간이 짧고, 식미감이 매우 우수하다. 병재배 시 배양 기간은 23일, 초발이 소요일수는 6일, 생육일수는 17일로 총재배기간이 46일이 소요되어 대조 품종 ‘갈뫼’에 비해 8일이 단축되었다. 갓 직경과 두께가 갈뫼에 비해 크거나 두꺼웠고, 갓 색은 진한 갈색을 나타냈다. 수량은 850 ml병 당 135 g으로 갈뫼 150 g 대비 10% 감소하였다. 하지만, 야생 팽이버섯처럼 식미감이 매우 우수하여, 차별화된 색과 맛으로 백색 팽이버섯 틈새시장 공략에 유리할 것으로 판단된다.

팽이버섯 신품종 ‘금향’은 ‘갈뫼’와 수집 야생균주인 ‘CBMFV-33’으로부터 분리한 단포자를 교배함으로써 육성된 품종으로, 갓 색이 진한 미색을 나타내며, 재배기간이 짧다. 병재배 시 배양 기간은 23일, 초발이 소요일수는 7일, 생육일수는 17일로 총재배기간이 47일이 소요되어 대조 품종 ‘갈뫼’에 비해 7일이 단축되었다. 갓 직경은 ‘갈뫼’에 비해 크고, 갓 색은 진한 미색을 나타냈다. 수량은 850ml 병 당 162 g으로 ‘갈뫼’ 대비 8% 증수되었다. 또한 야생 팽이버섯처럼 식미감도 우수하여, 차별화된 색과 맛으로 백색 팽이버섯의 틈새시장 공략에 유리할 것으로 판단된다.

We were conducted to know the community structure the insect fauna of the Cheonggyecheon, the urban natural restored stream. From 2007 to 2010, we were surveyed 18 times at 4 collecting sites, day and night. A total of 352 species of 99 families belonging to 11 orders were identified from 4,433 individuals collected terrestrial insects. Among them, 113 species, 52 families, 9 orders were collected in night time. Grouping by order, these 3 orders, Hemiptera (70 species in 20 families), Lepidoptera (69 species in 19 families) and Coleoptera (67 species in 17 families) were recorded high species number rather than the other orders. A yearly species number are as follows: 137 species, 57 families belonging to 10 orders were recorded in 2007; 162 species, 56 families belonging to 8 orders were recorded in 2008; 159 species, 61 families belonging to 9 orders were recorded in 2009; 166 species, 71 families belonging to 10 orders were recorded in 2010. The species number of lower stream (170 species, 53 families belonging to 8 orders from St.3 and 208 species, 67 families belonging 10 orders from St.4) was higher than that of upper stream (94 species, 47 families belonging to 8 orders from St.1 and 110 species, 48 families belonging 9 orders from St.2). The results of this study showed that diversity of the insect species in Cheonggyecheon have been keeping stable condition since 2008 after 3 years from the Cheonggyecheon restored. Accordingly, Cheonggyecheon is important habitat for terrestrial insects living in an urban environment which has severe ecological disturbances.

The purpose of this study was to verify the effect of mobile fashion shopping characteristics and perceived interactivity on perceived usefulness, and the effect of perceived usefulness on purchase attitude and purchase intention based on TAM (Technology Acceptance Model). We conducted the survey targeting smartphone users in their 20s~30s living in Seoul and metropolitan area. Among 483 data collected, we used 452 samples except 31 unreliable respondents for the analysis. To analyze the structural equation model, we did factor analysis, reliability analysis, and structural equation model analysis using SPSS 18.0 and AMOS 16.0. The results were as follows: We confirmed 5 mobile fashion shopping characteristics (enjoyment, credibility, instant connectivity, security, and personalization) and 3 perceived interactivity factors (control, responsiveness and two-way communication, and contextual offer) as results of confirmative factor analysis. Mobile fashion shopping characteristics and perceived interactivity had positive effects on perceived usefulness. Mobile fashion shopping characteristics affected perceived interactivity and also had indirect effect on perceived usefulness via perceived interactivity. In other words, mobile fashion shopping characteristics had direct and indirect effect on perceived usefulness. Perceived usefulness influenced purchase attitude and purchase attitude influenced purchase intention. Perceived usefulness had direct effect on purchase intention and the indirect effect through purchase attitude was significant.

최근에 상용화된 SWRO 막은 플럭스 감소만으로 파울링을 평가하기 어렵다. 따라서 본 실험에서는 열역학 모델식을 통해 유기막오염과 세정에 따른 투수계수(Lp)와 농도분극계수(fcp), 파울링에 의한 여과저항(Rf) 변화를 분석해보았다. 파울런트 미주입시, 원수 TDS농도별, 압력별로 Lp와 fcp를 분석하였고 그 후, 유기 파울런트를 주입하여 막오염 진행에 따른 Lp와 fcp 변화를 분석하였다. 실험 결과, 파울런트를 주입하지 않은 경우, Lp와 fcp는 동일한 원수의 TDS 농도에서 압력이 증가함에 따라 증가하고, 동일한 운전 압력에서 원수의 TDS 농도가 증가할수록 감소하였고, 막오염 진행에 따른 Lp와 fcp의 감소 경향은 플럭스 감소 경향과 일치하지 않으며 막오염 물질 별로 다른 양상을 보였다.

In the present work, a new synthesis method has been reported for preparing high-quality NaA zeolite membrane. The present method involves pressure-driven hydrothermal gel coating method(HGCM) on seeded α-alumina support surface having pores of 0.1 and 0.7μm diameter before the secondary growth process. The experimental data revealed that the high-pressure injection of hydrothermal gel solution on α-alumina support surface helped in the pore filling and thin layer coating of gel particles, which promoted the formation of uniform, defect free, and dense zeolite layer. Pervaporative dehydration experiments were conducted for 50 wt.% ethanol-water mixture at 343K. The NaA zeolite membrane, which was prepared by HGCM process on the 0.7μm support, showed that the high total flux was 4.7 kg m-2h-1 and separation factor was more than >1000.

대량생산이 가능하여 바이오매스로서 활용가능이 큰 부레옥잠의 수확 후 건조 장치를 개발하기 위한 열풍건조 특성을 분석하였다. 수확 후 절단된 원료의 경우 수분과 원료 고형분이 혼합된 죽처럼 형상화되어 공극이 불량하여 통풍건조가 불가능하였다. 절단하지 않은 원료는 공극이 비교적 잘 형성되어 통풍건조가 가능하였으며, 풍량 2 수준(33.53 m3/min, 42.58 m3/min) 건조공기 온도 3 수준(26 ∼ 28℃, 30 ∼ 32℃, 34 ∼ 37℃)으로 건조실험을 수행한 결과 건조속도는 건조공기 온도에 많은 영향을 받았으며, 부레옥잠 열분해 처리를 위한 함수율을 약 20%로 가정할 경우, 가장 적합한 건조방식은 풍량 42.58 m3/min, 건조공기온도 37℃, 풍량비 1.05 m3/min-kg인 열풍 Ⅱ 건조 방식임을 알 수 있다. 따라서 향 후 개발되는 부레옥잠 건조용 건조 장치를 설계하는 경우 건조공기온도 약 40℃ 이상, 풍량비 약 1.05 m3/min-kg 이상을 기준으로 송풍량과 공기가열 히터 용량을 결정하면 건조속도 5%/hr 이상, 최종건조함수율 20% 이하로 부레옥잠을 건조하는 것이 가능할 것으로 판단되었다.