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.

제주 토양유형이 ‘제시골드’ 키위 과실의 품질에 미치는 영향

문두경,김천환,김성철,손다니엘,좌재호,성기철,정희찬,엄한철,이영재 경상대학교 농업생명과학연구원 2012 농업생명과학연구 Vol.46 No.6

Soil types for cultivated crops are approximately compose of volcanic ash soils for black(21%) and dark brown soils(41%), and non-volcanic ash soil of red-yellow soil(17%) in Jeju Island . The effects of these soils on fruit qualities of kiwifruit ‘Jecy Gold’(Actinidia chinensis cv. Jecy Gold) were investigated in non-heating plastic house. Soil moisture potential was the lowest in the red-yellow soil during fruit growth. However, transverse diameter of fruit in the red-yellow soil was tends to be smaller than in volcanic ash soils, but longitudinal length of fruit was not shown difference by soil types during fruit maturation. Soluble solids in fruit was not differed by soil types until 140 days after of anthesis, after that the red-yellow soil was the highest. No difference on acid contents and hardness of fruit by soil types. Fructose, glucose and sucrose contents in harvested fruit were 4.45±2.08, 5.43±1.13, and 2.40±0.40% for the red-yellow soil, 2.51±0.55, 3.52±0.86 and 0.79±0.33% for the black soil and 2.54±0.47, 3.52±0.73 and 0.73±0.38% for the dark brown soil, respectively. These results show that soluble solid and free sugars in fruit were affected by soil types. It is estimated that soil moisture was rapidly drought in the red-yellow soil of non-volcanic ash soil than in the black and dark brown soils of volcanic ash soil. 동일한 무가온 하우스 내에서 화산회토양(흑색, 농암갈색) 및 비화산회토양(암갈색)에 재배되고 있는 5년생 참다래 ‘제시골드’(Actinidia chinensis cv. Jecy Gold) 과실의 품질에 미치는 영향을 토양유형에 따라 비교하였다. 토양유형별 토양수분포텐셜은 암갈색 비화산회토양이 가장 낮았다. 개화 후 과실 종경의 비대는 토양에 따른 차이를 나타내지 않았고, 횡경비대는 암갈색 비화산회토양이 흑색 및 농암갈색 화산회토양보다 작은 경향이었다. 과실의 당도는 개화 후 140일까지는 차이가 없었으나, 140일 이후에는 암갈색 비화산회토양이 흑색 및 농암갈색 화산회토양보다 높았다. 수확 후 과실의 산함량 및 경도는 토양유형에 따라 차이가 없었다. 과즙의 과당, 포도당 및 자당함량은 각각 암갈색 토양이 4.45±2.08, 5.43±1.13, 및 2.40±0.40%, 흑색 토양이 2.51±0.55, 3.53±0.86 및 0.80±0.33%, 농암갈색 토양이 2.55± 0.47, 3.53±0.73 및 0.73±0.38% 이었다. 따라서 과실의 당도는 토양특성에 따라 영향을 받는다. 이러한 원인은 비화산회토양인 암갈색 토양이 화산회토양인 흑색 및 농암갈색 토양보다 토양수분 보유능력이 낮기 때문으로 판단된다.

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.

2004 이공계 전공 및 진로 엑스포 행사를 마치고

문두경 한국공업화학회 2004 공업화학전망 Vol.7 No.4

유기태양전지의 소재 및 연구 동향

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

첫물차 노란잎과 녹색잎 자원의 아미노산 및 카테킨 함량 비교

문두경,권윤숙,이소진,권용희,송은영,김병혁 한국차학회 2023 한국차학회지 Vol.29 No.2

The tea plant leaves at the first harvest time have green, purple, yellow, and white colors. The tea plant with yellow tea leaves contained the albino tea germplasm at the Gurye-gun of Jeollanam-do in Korea. This study compared the chlorophyll, amino acid, and catechin contents at the first harvest time in tea plants with yellow leaf (YL) and green leaf (GL) by transplant and cultivation after cutting from the same site. The chlorophyll content of GL was 3.3 times higher than YL at the one bud two leaves of the first harvest time. The chroma of brightness (L), red (a), and yellow (b) were 1.4, 1.1, and 1.6 times higher in YL than in GL, respectively. On the other hand, the total amino acid was 41.0 ± 1.0 mg/g for YL and 16.0 ± 0.6 mg/g for GL, showing a 2.6 times higher amino acid content in YL than GL. The L-theanine content was also 3.0 times higher in the YL (25.8 ± 0.3 mg/g) than in the GL (8.7 ± 0.4 mg/g). The L-theanine content in the total amino acid was 62.9% for the YL and 54.4% for the GL. The other amino acid contents were 15.1 ± 0.7 mg/g for the YL and 7.3 ± 0.2 mg/g for the GL. The total catechin content was 8.96 ± 0.08 mg/g for the YL and 7.19 ± 1.22 mg/g for the GL. The (-)-epigallocatechin-3-gallate (EGCG) and (-)-epigallocatechin (ECG) contents were higher in the YL than in the GL. Nevertheless, the (-)-epigallocatechin (EGC) content of GL was 1.2 times higher than the YL. In conclusion, the YL is another cultivar compared to the GL because of its different leaf yellow color, high amino acid, and L-theanine contents than GL.

녹차 품종 추출물의 항알레르기 및 항산화 효능 평가

문두경,박샛별,김형돈,최재훈,서경혜,장귀영,이정훈,김동휘,이승은 한국약용작물학회 2018 한국약용작물학술대회 발표집 Vol.2018 No.10

Background : The health-promoting effects of green tea are mainly attributed to its polyphenol content, particularly flavanols and flavonols, which account for 30% of a fresh leaf’s dry weight, but the ingredients of the polyphenol content vary depending on the species. This study was conducted to select some candidates with superior anti-oxidative and anti-allergy effects from among seven cultivars of green tea. Methods and Results : Green tea extracts were prepared by extraction with ethanol and by evaporation of the solvent at low pressure. To evaluate their anti-allergy effect and cell viability, the samples were tested for ß-hexosaminidase inhibitory activity and MTT assay of the RBL-2H3 cells, respectively. The anti-oxidation effects of the samples were analyzed with a DPPH radical scavenging activity. According to the results of the experiment, four extracts including Camelia sinensis var. Kemsull, C. sinensis var. Beachwisull, C. sinensis var. Chamnok and C. sinensis var. Fushun showed effective ß-hexosaminidase inhibitory activity at 12.5, 25, 50, 100 ㎍/㎖. At 50 ㎍/㎖, C. sinensis var. Saemidori had the highest cell viability as 86.1%, and all of the samples showed cell proliferation above 70% at 25 ㎍/㎖. The extract of C. sinensis var. Kemsull showed a 60 - 70% inhibitory effect on the DPPH radical at all of the tested concentrations, whereas the extracts of C. sinensis var. Ryohu, C. sinensis var. Saemidori, C. sinensis var. Yabukita showed lower DPPH inhibition effects at around 10 - 30%. Conclusion : The results of this study indicate that the extracts of C. sinensis var. Kemsull, C. sinensis var. Beachwisull, and C. sinensis var. Chamnok have more prominent anti-oxidation and anti-allergy effects than other cultivars, and thus could be utilized as resources for improving health.

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

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

PE 및 PP 수급 동향

문두경,Mun, Du-Gyeong (사)한국포장협회 2006 包裝界 Vol.161 No.-

플렉시블 유기 전자 소자를 위한 비정질 투명전극

문두경 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.0

최근 유기 전계 발광소자 (organic light emitting diode, OLED), 유기태양전지(organic photovoltaic, OPV), 유기 박막 트랜지스터 (organic-thin film transistor, OTFT) 등의 플렉시블 전자소자에 대한 요구가 커지면서, 핵심 부품인 플렉시블 투명전극에 대한 산업계의 관심이 증가하고 있다. 현재, 디스플레이, 태양전지 분야에서 인듐 주석 산화물(indium tin oxide, ITO)이 투명전극으로 주로 사용되고 있다. ITO는 우수한 광투과성, 전기전도성을 보이지만, 휘거나 굽혔을 때, 깨지기 쉽고, 플라스틱 기판의 유리전이 온도 이상의 고온 공정이 수반되기 때문에, 플렉시블 유기 전자 소자의 투명전극으로 사용하기 어렵다는 한계를 보인다. 이에 본 발표에서는, 연구팀에서 개발한 비정질 플렉시블 투명전극 소재와 이를 OLED, OPV 등의 유기 전자 소자에 적용하여 플렉시블 유기 전자 소자를 구현한 연구성과를 소개한다.