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택사 수량과 품질 향상을 위한 적정 수확시기와 건조 온도
현규환,권병선,임준택,신동영,신종섭,Hyun, Kyu-Hwan,Kwon, Byung-Sun,Lim, June-Taeg,Shin, Dong-Young,Shin, Jong-Sup 한국작물학회 2006 Korean journal of crop science Vol.51 No.suppl1
The characteristics associated with the Alisma plantago quality and the factors as the proper harvesting time and drying temperature of Alisma plantago were examined from 2004 to 2006 at Sunchon, Southern region. The Alisma plantago cultivars tested were Sunwol and Yongjun. The highest yields of root and good quality, color and luster were obtained when harvested 22 days after first frost date and dried with $35-40^{\circ}C$ of a weeks at the drying oven for Sunwol and Yongjin cultivars. Considering from our results, optimum harvesting time were most likely to be harvesting time of 22 days after first frost date and drying temperature of $35-40^{\circ}C$ of a weeks at the drying oven. 남부지역에서 고품질의 택사를 생산하기 위하여 적정 수확시기와 적정 건조온도를 검토하기 위하여 2004년부터 2006년까지 택사 선월종과 용전종을 공시하여 실험을 수행하였는데 그 결과를 요약하면 다음과 같다. 1. 첫 서리(초상) 후 22일 만인 12월 29일에 수확함으로서 선월종과 용전종이 수량성이 가장 높았고 품질에서도 회전식 박피기에서 박피한 결과 완전한 백색의 택사로 광택이 뚜렷하여 우수하였다. 2. 택사 수확 후 건조기 내에서 1주야로 7일간 $35-40^{\circ}C$ 건조할 때에 알맹이 택사(껍질이 벗겨진 박피된 택사)의 수량성이 가장 높았고 품질에서도 완전한 백색의 택사로 광택이 뚜렷하여 우수하였다. 따라서 택사의 품질 향상을 위해서는 첫 서리(초상)후 29일에 수확하고 건조는 $35-40^{\circ}C$ 건조기 내에서 1주일 건조함이 타당하리라고 생각된다.
호박잎에서 Paraquat 활성 억제 물질의 분리, 동정 및 특성 구명
현규환(Kyu Hwan Hyun),윤영범(Young Beom Yun),장세지(Se Ji Jang),신동영(Dong Young Shin),권오도(Oh Do Kwon),최현석(Hyun-Sug Choi),정하일(Ha-Il Jung),국용인(Yong In Kuk) 韓國雜草學會 2012 Weed&Turfgrass Science Vol.32 No.3
선행연구를 통해 18종의 호박 품종에 대한 엽위별 paraquat에 대한 내성 반응을 조사한 결과, 1엽<2엽<3엽 The fourth leaves (younger leaves) amongst extended 4-upper leaves in 18 squash cultivar were the highest tolerance to the paraquat application, followed by third, the second, and the first leaves (older leaves). The forth leaves in Joongangaehobak showed more than three times higher tolerance to the paraquat application than did the first leaves. When the combining of water extract from the fourth leaves with paraquat were applied to the leaves and stems of maize, the paraquat phytotoxicity in maize was reduced compared to the paraquat application alone. Therefore, this study continued to investigate if the phytotoxicity inhibitor exist in the fourth leaves. The water extract in the fourth leaves were isolated by silica gel column chromatography, Sephadex LH-20 column chromatography, TLC, and HPLC, and the substance in the extract was speculated as a malic acid by identifying through NMR. The mixture malic acid and paraquat were applied to the maize to verify the application effect of malic acid on paraquat toxicity. The 100μM of paraquat application alone showed 62% of paraquat toxicity to the corn leaves, while the combined application of 100μM paraquat with malic acid at 0.1, 0.3, 0.5, and 1.0% did not show the symptom.
차응애에 대한 Emamectin Benzoate의 살응애 활성
국용인(Yong In Kuk),현규환(Kyu Hwan Hyun),김상수(Sang Soo Kim) 한국차학회 2016 한국차학회지 Vol.22 No.4
The acaricidal activity of emamectin benzoate against the tea red spider mite, Tetranychus kanzawai was evaluated in laboratory bioassays. Treatment with emamectin benzoate at concentrations of 10.75-3.58 ppm was highly effective against the adult female of T. kanzawai and yielded 100% adulticidal activities at 1 day after treatment. The adult females exposed to emamectin benzoate at concentrations of 10.75-3.58 ppm produced 0-0.5% as many eggs as did the control females. Emamectin benzoate was ineffective against the eggs of T. kanzawai, however treatment at 10.75 and 5.38 ppm revealed 100 and 90% larvicidal activity within 24 h after hatching, respectively. Treatment with emamectin benzoate at 10.75-3.58 ppm was highly effective against the nymphs of T. kanzawai and exhibited 97.8-100% nymphicidal activities. Based on the results, emamectin benzoate could be used for the control of T. kanzawai and treatment at 5.38 ppm was recommended for further field tests.
임준택,권병선,정동수,계봉명,현규환,신동영,Lim, June-Taeg,Kwon, Byung-Sun,Jung, Dong-Soo,Kae, Bong-Myung,Hyun, Kyu-Hwan,Shin, Dong-Young 한국작물학회 2006 Korean journal of crop science Vol.51 No.suppl1
This study was conducted to select the most suitable dye bath soil of mat rush for good quality. Dry stem weight ranged from 102.5 to 107.0 g, dry stem ratio ranged from 34 to 36%, color of stem ranged from soft gray to heavy gray, degree of softness ranged from high to low and degree of floating ranged from extremely high to low. All the good quality components, such as dry stem weight, dry stem ratio, color of stem, degree of softness and degree of floating showed large variations. Hadong white ceramic soil, the superior dye bath soil of mat rush, showed relatively superior values for all the good quality components with 102.5 g in light dry stem weight, 34% in high dry stem ratio, good color of soft gray in color stem, high in degree of softness and extremely high id degree of floating. The results indicate that dye bath soils shows different adaptabilities to a particular dye bath and Hadong white ceramic soil seems to be the most suitable dye bath soil of mat rush for good quality.
표고버섯의 생육시기별 성분분석 - 표고버섯의 활용방안 연구 I -
조덕봉(Duk Bong Cho),현규환(Kyu Hwan Hyun),나광출(Kwang Chool Na),최지호(Jiho Choi),서재신(Jae Sin Seo),강성구(Seong-Koo Kang),김용두(Yong Doo Kim) 한국자원식물학회 2002 한국자원식물학회지 Vol.15 No.2
1. 조단백질 함량은 갓과 대부위 모두 생육시기가 증가함에 따라 증가하다가 과숙기에서는 감소하였으며 조지방은 생육시기가 증가할수록 감소하였고, 회분과 환원당은 모두 증가하는 경향으로 나타났다. 2. 표고버섯에서 17종의 아미노산이 검출되었으며, 총 아미노산 함량은 버섯이 생육함에 따라 증가한 후에 과숙이 되면서 감소하였고, 다량 함유된 아미노산은 Glu, His, Gly 및 Gly 등이었다. 유리 아미노산의 경우도 총 아미노산과 유사한 경향이었다. 3. 무기질은 생육시기가 증가할수록 대체적으로 증가하는 경향이었으나 K는 감소하였으며, K와 P의 함량이 다른 무기성분보다 매우 높았다. 4. 표고버섯에 주로 함유되어 있는 지방산은 linoleic acid, palmitic acid, oleic acid였다. 5. 주로 함유되 있는 향기성분은 1-octen-3-ol이 가장 많아 향기의 본체로 추측되며 그 외에 ethyl acetate, 3-octanone, ethanol, (E)-2-octenal, 4-octen-3-one, acetaldehyde, ethyl formate도 다량 함유되어 있었으며 , 갓 부위와 대 부위의 함량을 비교해 본 결과 갓 부위에 다량함유되어 있었다. Content of crude protein in both pileus and stalk increased progresively as growth period became longer and then decreased at old stage. Contents of ash and reducing sugars followed the same trend as that of the crude protein. However, content of crude lipid decreased as growth progressed more. Seventeen kinds of amino acid were detected in Lentinula. Content of total amino acid increased as mushroom grew more, but decreased after old stage. The amino acid such as Glu, His, Gly and Ala were contained with relatively large amount in Lentinula. Content of free amino acid showed the similar trends as that of total amino acid. Contents of most of the mineral increased as growth period progressed, but K content decreased as growth period became longer. Contents of K and P were much higher than contents of other mineral. The major fatty acid contained in Lentinula were linoleicacid, palmitic acid and oleic acid. The large amount of volatile component in Lentinula was 1-octen-3-ol, so that this material was speculated to be major source of perfume. Other perfumic materials such ethyl acetate, 3-octanone, ethanol, (E)-2-octenal, 4-octen-3-one, acetaldehyde, ethyl formate were also contained in Lentinula, especially in pilous.