2004 이공계 전공 및 진로 엑스포 행사를 마치고

문두경 한국공업화학회 2004 공업화학전망 Vol.7 No.4

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.

Sugar and Acid Contents in Different Portions of ‘Shiranuhi’ Mandarin Fruit as Affected by Water Stress

문두경,고상욱,한승갑,최영훈,김용호 한국원예학회 2008 Horticulture, Environment, and Biotechnology Vol.49 No.4

The effect of water stress on sugar and organic acid content in different portions of ‘Shiranuhi’ mandarin fruit ([C. unshiu × C. sinensis] × C. reticulata) was investigated. Soluble solids (SS) was higher in water-stressed fruit than in control fruit in all fruit parts. The gradient of SS in the radial direction in both control and water-stressed fruit was consistently the greatest at the outer portion and the lowest at the central portion. Water stress caused a 9 to 34% increase in sucrose content in all fruit parts compared with control fruit. The radial difference in acidity was the greatest between the mid section and the stylar end, and acidity in the axial direction was higher in the outer than in the central and the middle portions from 216 days after anthesis in water-stressed fruit. Water stress caused a 31 to 84% increase in citric acid and a 0 to 35% decrease in malic acid content in all parts compared with control fruit. Overall, water stress had a negative effect on fruit quality due to increased acidity.

Sugars and Organic Acid Contents in Different Parts of Juice Sacs in ‘Shiranuhi’ Mandarin Fruit at Harvest

문두경,고상욱,성기철,현해남 한국원예학회 2009 Horticulture, Environment, and Biotechnology Vol.50 No.6

Sugar and organic acid contents in different parts of juice sacs in ‘Shiranuhi’ mandarin ([Citrus unshiu × C. sinensis] × C. reticulata) fruit were determined at harvest. Total sugar and sucrose contents increased from the center parts outwards of juice sacs, while reducing sugar (fructose and glucose) contents increased inwards from the outer to central parts. Sucrose/hexose ratios ranged from 1.31 to 1.59 in different parts of juice sacs, with the central parts showing the lowest ratios. Citric acid content was the highest whereas malic and oxalic acid contents were the lowest in the central parts of juice sacs. These results suggest that sugar accumulation in the central parts of juice sacs in ‘Shiranuhi’ mandarin fruit continues in the radial direction up to the latest stages of maturation.

차세대 에너지 화학소재의 분자구조/미세배열 제어기술-핵심소재원천기술개발사업 성과발표; 2SK-7 : 유기박막태양전지의 초정밀 전사형 분자 소재 기술

문두경 한국공업화학회 2014 한국공업화학회 연구논문 초록집 Vol.2014 No.0

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.

1LB-8 Techniques of Molecular Structure Design for High-Performance Polymer Solar Cells

문두경,전성재,한용운 한국공업화학회 2017 한국공업화학회 연구논문 초록집 Vol.2017 No.1

Bulk heterojunction polymer solar cells (PSCs) consisting of polymer; fullerene blends have been reported to exhibit high efficiencies of greater than over 11%. If the consideration of stability, cost and efficiency for commercialization of PSC, introduction of non-fullerene derivatives make them a compelling choice for high-performance PSC compared to devices using fullerenes. The molecular structure design of polymer based on non-fullerene derivatives that forms an compensating light absorption ranges and well matched energy levels is an important to obtain high-performance PSCs. In the study, the relationship between molecular structure and photovoltaic properties of organic materials for efficient PSC devices will be presented. Furthermore, the latest progresses of electron donors and acceptors, especially for conjugated polymers and non-fullerene derivatives, will be introduced.

차세대 에너지 화학소재의 분자구조/미세배열제어기술-핵심소재원천기술개발사업 성과발표; 2SK-1 : 차세대 에너지 화학소재의 분자구조/미세배열 제어기술

문두경 한국공업화학회 2014 한국공업화학회 연구논문 초록집 Vol.2014 No.0

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.-