노화는 말초 혈관 기능에 퇴행성 변화를 가져올 수 있으며 혈관의 기능은 혈관생성 지표의 영향을 받는 것으로 보고되고 있다. 따라서 이 연구는 젊은 흰쥐와 노화된 흰쥐를 대상으로 골격근(가자미근)에서 나타나는 혈관생성 지표인 Ang-1과 Ang-2의 단백질 발현의 차이를 비교하고 Ang-1 : Ang-2 ratio의 차이를 분석 및 관찰하기 위해 수행되었다. 연구의 목적을 위해 12주령 흰쥐(SD rats) 6마리와 20개월령 흰쥐 6마리를 Young 집단과 Old 집단으로 구분하였다. Old 집단의 경우 20개월 동안 직접 사육하여 노화 상태를 유도하였다. 골격근(가자미근)에서 관련 단백질의 발현 정도를 알아보기 위해 western blot 기법을 사용하였다. 연구결과, Ang-1 단백질은 젊은 집단에 비해 노화집단에서 낮게 나타나며 집단 간 차이를 보였다(p= .001). Ang-2 단백질의 경우, 젊은 집단에 비해 노화집단에서 유의하게 높게 나타났다(p= .007). 마지막으로 Ang-1:Ang-2 ratio는 젊은 집단에 비해 노화집단에서 유의하게 낮게 나타났다(p= .001). 따라서 골격근 내 혈관생성 관련 단백질들은 노화에 의해 변화되는 것으로 사료된다.

전기장에 의해 생성 된 진공 분극은 양자장에서 가상 전자-양전자 쌍의 재배열을 만든다. 그러나 정지 전하가 다른 장소로 이동할 때, 정지 전하에 의해 생성된 전기장은 사라질 것이다. 이때, 정지 전하에 의해 분극화된 가상 전자-양전자 쌍들은 같이 소멸된다. 가상 전자-양전자의 소멸 과정에서 가상 광자가 생성되는데, 이때 만들어지는 가상 광자들은 양자 전기 역학에서 자기력을 매개하는 광자가 된다. 이로 인하여, 전하의 이동은 자기장을 발생시키고, 전기장의 변화가 자기장을 생성하게 하는 원인이 된다.

This study was conducted to investigate cucumber plants response to greenhouse environments by solar shading in greenhouse in the summer. In order to estimate heat stress reduction of cucumber plants by solar shading in greenhouse, we measured and analyzed physiological conditions of cucumber plants, such as leaf temperature, leaf-air temperature, rubisco maximum carboxylation rate, maximum electron transport rate, thermal breakdown, light leaf respiration, etc. Shading levels were 90% mobile shading of full sunlight, 40% mobile shading of full sunlight and no shading(full sunlight). The 90% shading screen was operated when the external solar radiation is greater than 650 W·m-2. Air temperature, solar radiation, leaf temperature, leaf-air temperature and light leaf respiration in the 90% shading of full sunlight was lower than those of 40% shading and no shading. Rubisco maximum carboxylation rate, arrhenius function value and light leaf respiration of the 90% shading were significantly lower than those of 40% shading and no shading. The thermal breakdown, high temperature inhibition, of 90% shading was significantly higher than that of 40% shading and no shading. Therefore, these results suggest that 90% mobile shading made a less stressful growth environment for cucumber crops.

This study was conducted to investigate the seedling qualities and growth of paprika according to various irrigation points (Ips) (30, 40, 50, 60 or 70%) of the water contents of rockwool cube for raising seedlings of paprika. Growth degree of paprika seedlings was positively correlate with various irrigation points. In particular, paprika seedlings with IP 30-40% and IP 50-70% treatments were significantly higher than those with other treatments. Leaf area of seedlings was 50-100% wider in those with IP 50% and IP 40% treatments than those with other treatments, therefore dry weight was IP 30-60% heavier. The dry weight of more than IP 50% treatments had no significant differences. Leaf area (Y1) had a significant relation with the irrigation point (x) as Y1 = 48.311x + 133.7 (R2 = 0.9116**). Also dry weight (Y2) of the seedlings showed a linear regression equation as Y2 = 0.1584x + 0.8616 (R2 = 0.8853*). Considering the leaf area and the dry weight of irrigation points for rising seedlings of paprika in this study, the optimum range of the irrigation points in the water contents of rockwool cube is IP 50%.

Effect of 6kg large unit with the carton box (20% open ratio) and MA box (10,000cc·m-2·day-1·atm-1 oxygen transmission rates modified atmosphere package), and the 100g small unit with MA film on asparagus sensory quality were evaluated. The CO2 concentration depended largely on the packing unit and maintained at around 3% in small MA packages, whereas in the MA box increased to 12%. Ethylene concentration rapidly increased until after 3 days of storage in MA packages and then decreased to maintain 5μL·L-1. Unrelated to the unit size, the lower weight loss was obtained in MA packages. A significant difference in visual quality was shown since the 15th day, the best and worst were the MA box and small MA package on the finish day. Off-odor was the highest in small MA packages and the lowest in the carton box (< 3.0). Although there was no significant difference in firmness among all treatments, the packages showed the highest firmness in tips and stems, respectively. The sugar content and hue angle decreased during storage, but there was no statistical difference in all treatments. EL was lowest and highest in small MA package and carton box, respectively. On the 10th day, the total aerobic bacteria was lowest in small MA packages, but no significant difference on the 20th day. E. coli was not found in all treatments on the 10th day, while it was the lowest in the MA box on the 20th day. The mold and yeast were not observed during the whole storage. Based on the above results, the carton box packaged with 10,000cc OTR film was more effective in maintaining the quality of green asparagus with the suitable CO2 concentration for asparagus cold storage.