• Korean Journal of Food Science and Technology
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• v.44 no.3
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• pp.337-342
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• 2012

The purpose of this study was to investigate total polyphenols, total flavonoid, and DPPH radical scavenging activity in 26 species of Korean natural plants and 14 species of medicinal plant extracts. The plant containing the highest total polyphenols and total flavonoids were Plantago asiatica, and Lespedeza cuneata G. Don, respectively. The content of polyphenols and flavonoids in natural plants was the highest in Lespedeza cuneata G. Don, which also demonstrated high DPPH radical scavenging activity. In medicinal plant extract, Saururus chinensis (Lour.) Baill and Artemisiae Asiaticae Herba had the highest level of total polyphenols (194.60 and 203.92 mg/g extract, respectively) and DPPH radical scavenging activity. Diospyros kaki Thunb and Dryopteris crassirhizoma did not contain high levels of total polyphenols (112.98, 121.46 mg/g extract, respectively) and flavonoids (46.10, 58.69 mg/g extract respectively), but DPPH radical scavenging activity was relatively high. Further study regarding plants that exhibit higher total polyphenols, total flavonoid, and DPPH radical scavenging activity is needed.

• Korean journal of applied entomology
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• v.9 no.1
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• pp.33-35
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• 1970

The author collected 2 species of spider mites from persimmon and citrus trees in Taegu and Chun Chon during the summer of 1961 and 1969. Tenuipalpus japonicus collected from persimmon trees and Panonychus citri collected from citrus trees in and from trifoliate orange trees. In 1958 and 1961 Dr. E. S. Lee recorded four phytophagous species, i.e. Panonychus ulmi, Tetranychus pacificus, Tetranychus urticae and Bryobia praetiosa.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2005.11a
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• pp.171-172
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• 2005

• Proceedings of The Korean Society of Agricultural and Forest Meteorology Conference
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• 2012.07a
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• pp.139-144
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• 2012

• Journal of the Korean Wood Science and Technology
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• v.36 no.1
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• pp.1-11
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• 2008

The purpose of this study is to examine the species of wooden members used in the Youngsanjeon Hall of the Sucknamsa temple in Anseong, Korea. Ninety-five wood samples from pillars, head-penetrating ties, beams, corner rafter, rafter, floor board and other wood members were identified. Seven species identified were hard pine, exotic pine, Zelkova serrata, Ginkgo biloba, Diospyros, Quercus(Cerrus) and Pyrus spp. In the case of pillars, eight were hard pines and the others Zelkova and Pyrus. Species of angle rafter were Ginkgo biloba and Zelkova. and those of beams were one hard pine and one Zelkova. Two purlin samples were Quercus(Cerrus) and rafters were hard pines except one Ginkgo and one exotic pine. Roof-filling timbers were identified as Zelkova and Diospyros spp. The other samples of roof-filling timbers were all identified as hard pines. The use of Ginkgo and several hardwoods in addition to hard pines may indicate supply of local logs near the Sucknamsa temple.

• KSBB Journal
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• v.10 no.1
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• pp.15-22
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• 1995

The embryos(6-8mm) isolated from seeds of Diospyros kaki were cultured on Murashlge-Skoog(MS), Woody Plant Medium(WPM), Campbell Durzen(CD), Lictvay's Medium(LM), Kao-Michaluk(KM), Nitsch, White, Heller, Wolter-Skoog(WS) media. The results showed that MS and WPM media were most suitable to the development of embryos into plantlets with length of $5.4{\pm}1.2 cm$ and 5-6 leaves. However, when LM and KM media were used, the addition of 1 to $2{\mu} moles/\ell GA_3$ was required for the germination of the embryos. Superoxide dismutase (SOD) activities, one of the changing factors in leaves according to physiological status displayed to be exceptionally significant in the leaves of plantlets germinated from seeds in potting sand soil contrary to those of cultured embryos specially around germination period.

• The Korean Journal of Pesticide Science
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• v.13 no.3
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• pp.171-176
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• 2009

In 2008, 110 isolates of Colletotrichum gloeosporioides were obtained from infected twigs of persimmon collected at Sangju and five fungicides (prochloraz manganese complex, tebuconazole, mancozeb+myclobutanil, fluquinconazole+prochloraz, and tebuconazole+tolyfluanid) were evaluated to determine their growth on fungicide-medium. Among them, the mycelial growth of 97.3 and 98.2% of isolates was inhibited over 91% in response to prochloraz ($250\;{\mu}g/m{\ell}$) and tebuconazole ($125\;{\mu}g/m{\ell}$), respectively, compared to untreated control. In response to mancozeb+myclobutanil, fluquinconazole+prochloraz, and tebuconazole+tolyfluanid, isolates of 96.4, 99.1 and 96.4% of them were inhibited by fungicides, respectively. Isolates showed the highest sensitivity to fluquinconazole+prochloraz among 5 fungicides. The correlation between tebuconazole and tebuconazole+tolyfluanid was higher (r=0.85).

• Proceedings of the Korean Society of Postharvest Science and Technology of Agricultural Products Conference
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• 2002.04a
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• pp.29-40
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• 2002

감잎으로부터 통풍치료, 미백효과, 고혈압 억제효과의 개발목적으로 9종의 flavan-3-ol 화합물을 분리하였고 기기분석에 의해 화학구조를 자혔다. 각 화합물은 (+)-catechin (+)-gallocatechin procyanidinB-l, pyrocyanidin C-1, prodelphinidin B-3, gallocatechin-(4$\alpha$$\longrightarrow$8)-catechin과 감나무 잎에서 새로운물질인pocyanidin B-7-3-0-gallate, procyanidin C-1-3'-3" -3.'S _0-trigallate, (-)-epigallocatechin-(4 $\beta$ -18)-epigallocatechin-(4$\beta$-'8)-catechin 3종류를 발견하였다. 감잎으로부터 순수 분리한 polyphenol류의ACE 저해활성측정을 실험한 결과 pocyanidin B-7-3-0-gallate는 100rM농도에서 94%의 저해효과를 나타내었으며 epigallocatechin-(4$\beta$$\longrightarrow$8)-epigallo-catechin-(4$\beta$$\longrightarrow$8)-catechia procyanidin C-1-3'-3" -3f'.-0-trigallate는 각각 90.69, 80.90% 저해를 하였다. Xanthine oxidase 저해활성측정을 조사한 결과pocyanidin B-7-3-0-galtate와 pocyanidin C-1-3'-3" -3/'S _0-trigallate 즉, gallate가 붙은 호합물에서100rM의 농도에서 66%와 63%의 강한 저해효과를 나타났다. Tyrosinase 저해활성을 측정한 결과는pocyanidin C-1-3'-3" -3.'S _0-trigallate는 100rM에서 70%의 강한 저해효과를 나타냈으며,epigallocatechin-(4$\beta$$\longrightarrow$8)-epigallo-catechin-(4$\beta$$\longrightarrow$8)-catechin는 51%의 저해효과를 나타내었다. 산업적응용을 위해 분획한 폴리페놀군은 미백효과 검증실험인 tyrosinase 저해율 측정평가에서 폴리페놀 함량이 가장 높은 Fraction 111의 경우 Sooppm에서 74.2%의 높은 저해율을 나타내었다. 항산화력 실험에서는500pw1이상에서 강한 활성능을 보인 SOD 유사활성능을 제외한 나머지 DPPH와 xanthine oxidase 저해효과에서는 Fraction II와III 모두가50ppm이상에서 80% 이상의 높은 유리라디칼 소거능력을 나타내었다. 그리고 각 Fraction별 항균력 측정 결과 Fraction 르와 111이 우수하게 나타났고 항균활성은 그람음성균보다 그람양성균에서 효과적이었으며, 농도별 항균력시험 결과 농도가 증가할수록 비례하여 저해율도 증가함을 알 수 있었다. 첨가농도를 달리하여 미생물의 생육도를 측정한 결과, fraction II磎꼭\ulcorner경우 그람양성균에 대해 500 ppm 이상에서 뚜렷한 증식억제효과를 나타내었다.서 뚜렷한 증식억제효과를 나타내었다.

• Korean journal of applied entomology
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• v.29 no.4
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• pp.269-276
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• 1990

This study investigated host range, seasonal occurrence and developmental characteristics of Ceroplastes pseudoceriferus Green on persimmon trees. The host plants covered 34 families and 66 species, including newly recorded species of Chenopodum album var. centrorubrum, Glycine max, Begonia semperflorens, Pharbitis nil, Perilla frutescens var. japonica and Erigeron canadensis. There was one generation of C. pseudoceriferus a year with larval stage expanding from mid-June to mid-October. Average number of eggs laid per female was 1,073$\pm$177.3. Hatching rate was 97.3% and was not affected by temperatures and photoperiods. Stadium varied as 23.4 days in eggs, 128.3 days in larvae and 213.3 days in female adults including overwintering periods at natural condition.

• Korean Journal Plant Pathology
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• v.13 no.4
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• pp.215-218
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• 1997

The environmental factors affecting maturity of pseudothecia overwintered in iufected leaves by Mycosphaserella nawae was investigated. The pseudothecia in the overwinteringinfected leaves were matured at the end of April when the average temperature was $14^{\circ}C$ and precipitation was enough. Pseudothecia initiation was preceded by the fungal biomass development in a given host. The maturity of the pseudothecia from the leaves defoliated in early October was earlier and higher than those defoliated in November of the previous year. Pseudothecia development was also positively affected by low temperature. The maturity time, as determined by percentage of matured pseudothecia out of prematured ones, was also 20 days earlier, and the rate of maturity was higher for the leaves overwintered in door, than for those kept in greenhouse. We have providedevidence that the conidia play a significant role in the epidemiology of this pathogen. Many pseudothecia were developed in the leaves infected by artificially inoculated conidia and maturation rate of the pseudothecia was not different from that of the typical symptom by ascospores infection of Mycosphaerella nawae.