• Proceedings of the Korean Vacuum Society Conference
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• 2016.02a
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• pp.141.2-141.2
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• 2016

디스플레이, 센서 등 전자소자는 소형화 단계를 지나 인체 부착형 소자로의 발전을 요구하고 있다. 인체 부착을 위해서는 민감한 피부에 장시간 부착시 무해성과 탈부착의 자유로움이 요구되기에 기존의 화학물질을 활용한 접착 방식에서 개코도마뱀 또는 딱정벌레 발바닥에서 영감을 얻은 자연모사형 건식 접착 방식에 대한 연구가 활발하게 진행되고 있다. 폴리머를 이용하여 자연모사형 마이크로/나노구조 형성은 기계적으로 가공된 금형 몰딩과 후처리를 통한 매우 복잡한 공정이 요구된다. 본 연구에서는 이러한 복잡한 공정을 단순화하기 위해서 폴리머 소재에 플라즈마를 활용한 나노구조를 형성하는 방법을 소개하고자 하며, 건식 접착용 폴리머 소재(PMMA, PDMS)에 따른 표면구조 변화와 표면에너지 변화에 대한 연구를 수행하였다. 플라즈마 표면처리를 위해서 본 연구실에서 자체 개발한 선형이온소스를 활용하였으며 입사에너지, 노출시간, 사용가스에 따른 표면형상 변화를 주사전자현미경을 활용하여 관찰하였다. 또한 처리조건에 따른 표면에너지 변화를 확인하기 위해 물접촉각 변화를 측정하였다. PMMA는 입사에너지, 노출시간이 증가함에 따라 쉽게 나노기둥구조가 형성되었으나, 과도한 입사에너지 또는 노출시간에서는 표면구조가 에칭되면서 무너지는 것이 관찰되었다. 또한 PDMS는 동일한 조건에서 주름구조 형태를 보였으며 노출시간이 증가할수록 주름구조의 간격이 늘어남을 확인하였다. 본 연구 결과를 통해 나노 구조를 쉽게 제어할 수 있는 PMMA가 피부 부착형 접착 패치에 응용이 가능할 것으로 기대된다.

• Journal of Sericultural and Entomological Science
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• v.37 no.2
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• pp.167-171
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• 1995

To develope a microbial pesticide for the control of mulberry longicorn beetle, Apriona germari, Beauveria spp. were isolated from the infected Apriona germari larvae. The morphology of Beauveria spp. was observed by phase contrast and scanning electron microscope. In addition, the Beauveria spp. isolated from Apriona germari were identified by the random amplification of polymorphic DNA using polymerase chain reaction. The results showed that the Beauveria spp., SFB-1A and SFB-3A, isolated from Apriona germari were identified with B. bassiana and B. brongniartii, respectively, suggesting that the random amplification of polymorphic DNA is effective for the identification of Beauveria spp.

• Journal of Sericultural and Entomological Science
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• v.37 no.1
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• pp.57-61
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• 1995

In order to isolate naturally occuring novel B. thuringensis strains, we identified the distribution of B. thuringiensis from soils of sericultural farms(spring and autumn season, respectively) of various regions in Korea. A total of 82 strains of B. thuringiensis producing spore and crystal were isolated. We examined oral toxicity against lepidopterous larvae, Bombyx mori, dipterous larvae, Culex pipiens and coleopterous, Sitophilus oryzae. The results showed that 82 B. thuringiensis isolates from sericultural farms were isolated and most isolates were toxic to lepidopterous larvae. Particularly, B. thuringiensis strains which is lepidopterous-active, lepidopterous-and dipterous-active were widely distributed. Also, non-toxic B. thuringiensis isolate was common.

• Korean Journal of Environmental Biology
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• v.18 no.1
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• pp.133-144
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• 2000

The Brentidae is characterized by the reduced labial palpi, which is located in cavities on the apicoental margin of the prementum. The postcoila of two subfamilies of this family is deep and bowl-like on ental surface of the hypostomal arms. The mouthparts treated in here comprise the labrum, clypeus, mandibles, maxillae, labium, hypostoma and the septum of the preoral cavity. The terms are followed principally after Ting and Morimoto. The detail terminology fur the mandibles are newly given. [Insecta, Coleoptera, Comparative morphology, Mouthparts, Brentidae].

• Korean Journal of Environmental Biology
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• v.24 no.4
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• pp.337-358
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• 2006

The field survey was conducted weekly from April to October in 2004 and 2005 on the sites along the 5.16 road. Sampling sites were made every 100 m height starting from 250 m altitude of both sides of Mt. Halla along 5.16 Road, which crosses the mountain from North to South. Totally 31,698 individuals of 76 species belonged to 25 families were collected. It was July that showed the largest number of species, as 48 species in the northern sloper 42 in the southern slope, and 22 at the highest site (at an altitude of 750 m), while it was April that showed the smallest as 17 species, 15 and 5, respectively. As for monthly fluctuation, the northern slope and the highest site reached their top in August, whereas it was June in the southern slope. In the analyses of similarity (chord distance) of any pair of temporal communities, the closest pair was between June and July in the northern slope area, between July and August in the southern slope and between July and September at the highest site, respectively.

• Korean journal of applied entomology
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• v.26 no.1 s.70
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• pp.1-7
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• 1987

Studies were carried out with specimens collected throughout the country during $1984{\sim}1986$, and preserved specimens kept in the Insect Museum within the Dept. of Agricultural Biology, College of Agriculture, Seoul Nat'l Univ., and the Dept. of Entomol., Institute of Agricultural Sciences, Suweon, Korea. As the result of this study, 10 species and 1 subspecies are presented here with a key and descriptions. Among them, 7 species and 1 subspecies are already reported by others, while the rest 3 species (Agrypnus setigera, A. miyamotoi, A. hyponicola) are reported here for the first time in Korea.

• Korean journal of applied entomology
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• v.34 no.4
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• pp.344-349
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• 1995

To isolate naturally occurring novel Bacillus thuringiensis strains for useful pest con시 agents, A total of 64 isolates of B. thuringiensis producing spore and crystal were obtained from 583 soil samples in Korea. Toxicity of isolates was assayed against Lepidoptera (Bombyx ori), Diptera (Culex pipens) and Coleoptera (Sitophilus oryzae), respectively. The results showed that B. thuringiensis isolates toxic Lepidoptera are 42.2% , both Lepidoptera and Diptera are 31.3% and Diptera are 20.3%, demonstrating that spectrum of insecticidal activity of B. thuringiensis isolates is various. But no B. thuringiensis isolates have toxicity against Coleoptera.

• Korean journal of applied entomology
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• v.34 no.4
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• pp.373-377
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• 1995

Four Bacillus thuringiensis isolates obtained from soil samples in Korea produce parasporal inclusions non-toxic to 10 insect species of three orders, Lepidopera, Diptera and Coleoptera. These four isolates are named NTB-1, NTB-2, NTB-3 and NTB-4, respectively. The morphology of parasporal inclusions of four isolates observed by phase contrast- and scanning electron microscope was all ovoid. Characterization of four non-toxic B. thuringiensis isolates was determined by sodium dodecyl sulfate-polyacrylamide gel electrophoresis and restriction endonuclease analysis. The results showed that parasporal inclusion proteins and total plasmid DNA profiles of four isolates are different from other known non-toxic B. thuringiensis strains', suggesting that four isolates are novel.

• Korean journal of applied entomology
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• v.36 no.3
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• pp.215-223
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• 1997

A matrix model of rice weevil population based on degree day (DD) was constructed. The basic matrix model predicted on exponential jncrcase of the adult weevil density and the finite rate of increase(h) of the population was estimated to be 2.155/100DD. Adult density simulated by the matrix model including intraspecific competition showed a damped oscillation over time and reached at the stationary level of 530 at 69, 300DD. The experimental population showed similar features to that of the model. But there were some differences in the highest density and period of adult oscillation. The differences could largely be caused by the assumption of the model; resource constancy.

• Korean journal of applied entomology
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• v.28 no.1
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• pp.1-3
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• 1989

Parasitylenchus orthotomici sp. n. is described as a nematode parasite of Orthotomicus an¬gulatus in Korea. In a sample of 170 beetles randomly collected from Pinus densiflora S. et. Z, 51. 8% were parasitized by nematodes. The number of nematodes per bark beetle was ranged from 1 to 97. The parasitisms of F, generation were ranged from 43.2% to 52%. There was no positive tendency in nematode parasitism between sun-side and shade-side.