• Title/Summary/Keyword: Korea Science Academy

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Detection of Insect Pathogen Serratia marcescens in Protaetia brevitarsis seulensis (Kolbe) from Korea

  • Kwak, Kyu-Won;Han, Myung-Sae;Nam, Sung-Hee;Choi, Ji-Young;Lee, Seok-Hyun;Choi, Young-Cheol;Park, Kwan-Ho
    • International Journal of Industrial Entomology and Biomaterials
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    • v.28 no.2
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    • pp.25-31
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    • 2014
  • Protaetia brevitarsis seulensis (Kolbe) is widely used in Korea, as a protein-rich, alternate, functional food with pharmacological benefits. In addition to anti-oxidant properties, the larvae of P. b. seulensis also show positive effects against hepatic disorder and diabetes; therefore, P. b. seulensis larvae are being reared on a large scale in Korea. We evaluated reared larvae of P. b. seulensis from Gyeong-gi in Korea. Using 16SrRNA PCR, electro-microscopy, and bioassay techniques, we found that the larvae harbored Spo-1, a bacterium identified as the insect pathogen Serratia marcescens. Therefore, we highlight the use of this insect as an alternate food and the need for its sanitary rearing conditions, as contamination may affect public health.

A NEW FIELD δ SCUTI STAR: HD 235428 (새로운 δ SCUTI형 변광성 : HD 235428)

  • JEON YOUNG-BEOM;NAM KI-HYUNG;KIM SEUNG-LEE;PARK YOON-HO;KIM KI-HYUNG;KIM JI-YOON;KIM DAE-KYUM;JIN KANG-IL;KIM SU-HYUN
    • Publications of The Korean Astronomical Society
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    • v.19 no.1
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    • pp.27-31
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    • 2004
  • Through time-series CCD photometry using a 155mm refractor, we found a new $\delta$ Scuti type variable star, HD 235428, near a known bright $\delta$ Scuti type star, DQ Cep. We performed follow-up observations using a 61cm telescope at Sobaeksan Optical Astronomy Observatory. Four frequencies have been derived by multiple-frequency analysis, which are 15.804, 5.498, 15.351 and 24.516cycle $day^{-1}$, respectively. V-amplitude of HD 235428 is ${\Delta} V$ = 0.026.

Granulites of northern korea (한반도 북부의 백립암)

  • Glebovitsky, V.A.;Sedova, I.S.;Bushmin, S.A.;Vapnik, Ye.A.;Buiko, A.K.
    • The Journal of the Petrological Society of Korea
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    • v.3 no.3
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    • pp.196-219
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    • 1994
  • Granulite complexes in northern (the Nangnim block), eastern (ther Kimchaek zone of the Macheonryong belt) and southern (separate windows among upper Proterozoic structure such as the Wonsan, Nampo and Haeju granulites) parts of the Northern Korea are studied. Multistage deformations, metamorphic and migmatitic events, and granite formations are recognized in these granulite complexes. Mineral thermobarometry and fluid inclusion investigationss are used to establish the P-T evolutionary trends during prograde and retrograde metamorphic events. The peak metamorphism of granulites is characterized by temperature near $800^{\circ}C$ and pressure near 5.5-6 kb. Retrograde evolution includes cooling at constant pressure or with variable pressure ranging up to 7-8 kb. This P-T change corresponds to the transition from high to moderate or low geothermal gradient. The subsequent cooling is ac-companied by significant decompression to 3-4 kb.

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Occurrence of Violet Root Rot on Membranous Milk Vetch Caused by Helicobasidium mompa in Korea

  • Hong, Sung-Kee;Kim, Wan-Gyu;Choi, Hyo-Won;Lee, Young-Kee;Shim, Hong-Sik
    • Mycobiology
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    • v.39 no.4
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    • pp.321-323
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    • 2011
  • Severe violet root rot occurred in a field of membranous milk vetch in Bonghwa, Korea, in October 2010. Two fungal isolates from the diseased plants were identified as Helicobasidium mompa based on their morphological, cultural, and molecular characteristics. This is the first report that H. mompa causes violet root rot on membranous milk vetch in Korea.

Species Belonging to Genus Protodaedalea in Korea

  • Seok, Soon-Ja;Jung, Yun-A;Jin, Yong-Ju;Park, In-Cheol;Kwon, Soon-Woo;Kim, Yang-Sup;Yoo, Kwan-Hee
    • Mycobiology
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    • v.39 no.4
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    • pp.301-302
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    • 2011
  • One rare and interesting species collected from Seorak-san, Inje-gun; Yeonyeop-san, Hongcheon-gun; Daeam-san, Yanggugun, Gangwon-do; Pocheon-gun, Gyeonggi-do; Songni-san, Boeun-gun; Joryeong-san, Goesan-gun, Chungcheongbuk-do and Sobaeksan, Yeongju-si, Gyeongsangbuk-do is described and illustrated in detail. The species "Protodaedalea hispida Imazeki" and genus "Protodaedalea Iamzeki" has not been previously recorded in Korean fungal flora. The specimens have been deposited in the Herbarium Conservation Center of the National Academy of Agricultural Sciences.

Tectella patellaris from Korea

  • Seok, Soon-Ja;Jung, Yun-A;Jin, Yong-Ju;Park, In-Cheol;Kim, Wan-Gyu;Kim, Yang-Sup;Yoo, Kwan-Hee
    • Mycobiology
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    • v.39 no.4
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    • pp.303-305
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    • 2011
  • One rare and interesting species collected from Gyeryong-san, Chungnam Province is described and illustrated in detail. The species "Tectella patellaris (Fr.) Murr." and genus "Tectella Earle" is a first record for Korean fungal flora. Specimens cited here have been deposited in the Herbarium Conservation Center of National Academy of Agricultural Sciences.

Development of Naturally Degradable "Rice Polymer" For Organic Weed Management of Red Pepper and Rice

  • Kang, C.K.;Nam, H.S.;Lee, Y.K.;Lee, S.B.;Lee, B.M.;Oh, Y.J.;Jee, H.J.;Hong, M.K.;Jung, K.W.;Lee, Y.J.;Choi, Y.H.
    • Korean Journal of Organic Agriculture
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    • v.19 no.spc
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    • pp.119-122
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    • 2011
  • Among the developed bio-degradable polymer films as compared with transparent film(White), black polymer film was significantly more effective for controlling weeds in red pepper. Also, we found that white and black polymer mulching had 81.8% and 97.9% of managing weed controlling effects in rice, respectively. Compared to non-mulched rice paddy with water supply, the non-mulched rice paddy without any water supply has stopped its growth at 41 days after transplanting, while polymer-mulched rice paddy without water supply had about 60% of normally growing rice plants. This shows the polymer treatment has a remarkable effect on water and power saving, solution of herbicidal resistance, avoidance of herbicidal influence to eco-system etc. When the naturally decomposing polymer was used, a temperature was elevated as high as $4.7^{\circ}C$ on maximum and $2.6^{\circ}C$ on average. Also the naturally decomposing polymer accelerated rooting by 7 days and lowered a stress level from transplanting. The weed control effect mulched by polymer was remarkable as 98.7%. The polymer now, after 294 days treated on the rice paddy, has been completely decomposed.