In Vitro Sugar Accumulation in Juice Sacs of ‘Shiranuhi’ Mandarin

문두경,한승갑,좌재호,김천환,성기철 한국원예학회 2013 원예과학기술지 Vol.31 No.3

To further our understanding of sugar accumulation in ‘Shiranuhi’ mandarin [(C. unshiu × C. sinensis)× C. reticulate], we investigated the patterns of sugar uptake in juice sacs exposed to different concentrations of sucrose, fructose and glucose in vitro. Data was also collected on the change in weight and shape of the in vitro juice sacs over time. Soluble solids content, sugar content and acidity content were highest at 20% sucrose, fructose and glucose solution content; while fructose content was highest at 5% sucrose concentration. Furthermore, the juice sac’s fresh weight was highest at 5% sucrose and lowest at 20% fructose content. The shape of the juice sacs also differed in different sugar concentration and type. Overall, sucrose,fructose and glucose content in juice sacs increased with the sugar concentration. These results suggest that sugar translocation into juice sacs is actively induced by high sugar concentration in the medium. Thus, it can be concluded that sugar and acid accumulation in juice sacs increased with sugar concentration in vitro culture.

재배 온도에 따른 금설 및 야부기다 품종의 수확시기 및 성분 차이 비교

문두경,김주형,이소진,권용희,김천환,조정용 한국차학회 2019 한국차학회지 Vol.25 No.2

This study compared the growth characteristics and bioactive compound contents of Kemsull and Yabukita leaves grown in two different growth temperature (Temperature: +5 ℃), by using a temperature-gradient tunnel, during the months of April and June. Kemsull and Yabukita leaves in the high temperature region (HTR) (Temperature: +5℃) showed the fastest germination and growth. The growth of two cultivar leaves (1 bud 1 leaf, and 1 bud 5 leaves) was faster by about 12 days in the HTR than that in the low temperature region (LTR) (T: 0℃) during the first season of harvest. Yabukita had faster leaf growth than that of Kemsull. The two cultivars showed faster leaf growth in June than that in April. The Kemsull leaves had a relatively higher caffeine content (1.72~2.08 g/100 g) than did the Yabukita leaves (1.30~1.60 g/100 g), but there was no significant difference between the two cultivars according to the growth season and cultivation temperature. The Kemsull leaves had a significantly higher total catechin content (8.03~11.22 g/100 g) than that of the Yabukita leaves (7.27~8.84 g/100 g). The two cultivar leaves had a higher total catechin content in June than that in April. Under the same conditions of leaf growth in both April and June, the Kemsull and Yabukita leaves showed higher total catechin contents in the HTR and LTR, respectively. (-)-Epigallocatechin gallate and (-)-epigallocatechin were the main catechins of the two cultivar leaves. (-)-Epigallocatechin gallate and (-)-epicatechin gallate were the main catechins of the Kemsull leaf grown in June. These results indicate that the leaf growth and bioactive compound contents of Kemsull and Yabukita differ depending on the growing season and cultivation temperature. 본 연구에서는 4월과 6월에 온도구배터널을 이용하여 재배 온도가 다른 두 지역(T+5℃)에서 재배한 야부기다와 금설 찻잎의 생육특성 및 catechin류와 카페인 등을 포함한 성분학적 특성을 비교하였다. 금설 및 야부기다 품종은 온도가 높은 지역에서는 발아 및 생육시기가 빨라 1아 1엽부터 1아 5엽까지 수확시기를 보면 안쪽(T+5℃)이 중간(T+2℃) 및 바깥쪽(T+0℃)보다 각각 6일 및 12일 정도 빠르다. 야부기다는 금설에 비해 찻잎 생육이 빨랐으며, 두 품종 모두 4월보다 6월에, 그리고 재배 온도가 높은 지역에서 찻잎의 생육속도가 빠름을 확인하였다. Caffeine 함량은 금설의 찻잎(1.72~2.08 g/100 g)이 야부기다(1.30~1.60 g/100 g)에 비해 상대적으로 높았으나, 금설 및 야부기다 모두 생육 시기 및 재배 온도에 따라 뚜렷한 차이는 관찰되지 않았다. 금설의 총 catechin 함량(8.03~11.22 g/100 g)은 야부기다의 찻잎(7.27~8.84 g/100 g)에 비해 높았으나 두 품종 모두 4월에 비해 생육온도가 높고 일조량이 많은 6월에 더 높은 총 catechin 함량이었다. 그러나 4월과 6월에 생육하는 동안 일조량이 동일함에도 불구하고 금설은 재배 온도가 높은 환경에서, 야부기다는 재배 온도가 낮은 조건에서 총 catechin 함량이 상대적으로 높음을 확인하였다. 두 품종 모두 개별 catechin류 중 EGC와 EGCG가 총 catechin 함량에 차지하는 비중이 높은 다량 성분들이었으며, 6월에 재배한 금설 찻잎은 EGC와 EGCG가 catechin류의 다량 성분임을 알 수 있었다. 총 flavon-3-ol 함량은 금설에 비해 야부기다 찻잎에 더 높은 함량이었으며, 두 품종 모두 4월 보다는 6월에, 그리고 재배 온도가 상대적으로 낮은 조건에서 그 함량이 더높음을 확인하였다. 이상의 결과로부터 금설 및 야부기다는 생육 시기 및 생육 온도에 따라 찻잎의 형태 및 유용 성분 함량이 다름을 확인할 수 있었다.

유기태양전지의 소재 및 연구 동향

문두경 한국공업화학회 2008 한국공업화학회 연구논문 초록집 Vol.2008 No.1

유기반도체 소재 및 소자 그리고 산업

문두경 한국공업화학회 2022 한국공업화학회 연구논문 초록집 Vol.2022 No.-

Organic Solar Cells with Enhanced Photovoltaic Performance and Stability by Introducing Organic-Inorganic Hybrid Hole Transporting Layer

문두경,한용운,이형석 한국공업화학회 2018 한국공업화학회 연구논문 초록집 Vol.2018 No.0

Organic solar cells (OSCs) have been studied prospective energy converting devices for their low cost and various materials application. However, OSCs have some disadvantages such as limited absorption properties, low carrier mobility and energy level mismatch between electrode and active layer. MoO₃, good performance as hole transporting layer(HTL), needs essential deposit process in inverted solar cell. Although using solution process with PEDOT:PSS can reduce process cost, its acidic property can decrease stability of device. This problem can be overcome by introducing organic-inorganic hybrid HTL. To introduce this organic-inorganic hybrid HTL, the energy level between active layer and electrode can be modified and carrier mobility can be increased. In this study, we fabricated inverted structured OSCs with organic-inorganic hybrid HTL via solution process. As a result the stability and performance of OSCs with organic-inorganic hybrid HTL were enhanced.

Chemistry and Preparation of Functional CMP(chemical Mechanical Planalization) Slurry

문두경 한국공업화학회 2004 한국공업화학회 연구논문 초록집 Vol.2004 No.-

2014년 한국공업화학회를 회고하며

문두경 한국공업화학회 2014 공업화학전망 Vol.17 No.6

2004 이공계 전공 및 진로 엑스포 행사를 마치고

문두경 한국공업화학회 2004 공업화학전망 Vol.7 No.4

친환경농자재의 황색참다래 과실무름병 병원균 억제 효과

문두경,정봉남,고상욱,김성철,좌재호 한국유기농업학회 2016 한국유기농업학회지 Vol.24 No.2

The SS (Bacillus subtilis 10%), WS (Microbial extract 70%), and DS (Sulfur 78%) agents were selected by mycelial growth inhibitory effect test against kiwifruit soft rot pathogen (B. dothidea) with 11 kinds of environment-friendly agricultural materials on PDA medium for 10 days. They showed at 94.2%, 65.2%, 58.9%, respectively. The control value of WS and SS agents were better than DS in storage experiment. It was effective SS and WS single application, DS-WS and WS-SS alternate application in the field trial.

암면배지의 수분제어가 토마토의 생육 및 생산성에 미치는 영향

문두경,김소희,조명환,유인호,류희룡,최경이,권용희,이소진 한국농림기상학회 2018 한국농림기상학회지 Vol.20 No.2

This study was carried out to investigate the effect of plant growth and production of tomato (Lycopersicon Esculentum Mill cv. Tefunis) according to the water content of non-recycled rockwool culture in high-rise tomato greenhouse. Daily irrigation amount was 3.8 times higher in the irrigation control by Integrated Solar Radiation (ISR) than in the Frequency Domain Reflectometry (FDR) sensor. Water content of ISR and FDR was 90-95 and 60-65%, respectively. Plant height and weight of tomato fruit was 1.2-1.9 times longer and 1.2-2.0 times heavier in the ISR than in the FDR sensor, respectively. No significantly differed to sugar content of tomato by treatments. Marketable fruits were the higher 1.3 times in the ISR compared with the FDR sensor. Cracking percentage in the ISR was also the higher 2.0 times compared with FDR sensor. Therefore, Irrigation control by ISR was appropriate to improve of plant growth and production of tomato with non-recycled rockwool culture in greenhouse during long-term cultivation. 고측고 토마토 전용 하우스에서 비순환식 토마토 암면재배 시 배지 내 수분함량이 토마토 ‘데프니스’ 품종의 생육 및 과실의 생산성에 미치는 영향을 보고자 수행하였다. 양액공급량은 일사량제어가 FDR센서 수분제어보다 3.8배 많았다. 일사량제어의 수분함량은 90-95%였고, FDR센서 수분제어의 수분함량은 60-65%였다. 초장의 길이 및 토마토의 과중은 일사량 제어가 FDR센서 수분제어보다 1.2-1.9배 길었고, 1.2-2.0배 무거웠다. 상품과는 일사량 제어가 FDR센서 수분제어보다 1.3배 많았다. 과실의 당도는 처리간 차이가 없었다. 열과 발생량은 일사량 제어가 FDR센서 수분제어보다 2.0배 높았다. 따라서 비순환식 암면배지에서 토마토의 생육 및 생산성을 향상시키기 위해서는 일사량제어가 적당하다고 판단된다.