• Title/Summary/Keyword: 주사전자현미경

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저진공 주사전자현미경의 개발

  • Seol, In-Ho;Park, In-Yong;An, Sang-Jeong;Kim, Gwang-Il;Gang, Geun-Won;Jo, Bok-Rae
    • Proceedings of the Korean Vacuum Society Conference
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    • pp.94.2-94.2
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    • 2015
  • 주사전자현미경은 나노 크기의 재료 및 바이오 물질의 이미지를 관찰하는 가장 일반적인 분석 장비이다. 주사전자현미경을 이용한 시료 관찰은 주로 10-5 Torr 이하의 고진공에서 이루어진다. 부도체 재료는 전자빔에 의해 대전(charging)이 발생하여 이미지가 왜곡되며, 이를 방지하기 위해 금 등의 금속을 코팅한다. 한편 10-1 Torr 이상 압력의 저진공에서는 부도체 재료도 charging이 발생하지 않아 생물시료등의 부도체 표면을 코팅없이 관찰할 수 있다. 본 발표에서는 현재 개발중인 저진공 관찰 주사전자현미경의 차동배기구조를 보여준다. 또한 차동배기에 의해 가동 압력 10-1 Torr 이상의 시료실과 10-5 Torr이하의 전자총실의 진공 배기특성을 보고하며, 저진공에서의 주사전자현미경 이미지를 보여준다.

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Studies on the Character of Ant(Formicidae) in Korea on the Basis of Scanning Electron Microscope(I) -On the Form-Character of Smithistruma japonica(Ito)- (주사전자현미경을 이용한 한국산 개미의 형질특성에 관한 연구(I) -Smithistruma japonica(Ito)의 형질특성에 관하여-)

  • 김창효;최병문;방종렬
    • Korean journal of applied entomology
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    • v.30 no.4
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    • pp.285-290
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    • 1991
  • Smithistruma japonica(lto) unrecorded species of Dacetini tribe in Korea was found in Is. Kekumdo, Chonnam Province and named Saw teeth scale ant. The form-characteristics difference between Smithistruma japonica(Ito) and Strumigenys lewisi Cameron was discribed with the result of observation by the scanning electron microscope(SEM). Total species of Dacetini tribe in Korean contained two species in two genus.

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The Effects of Natural Disinfectants Naringin on Corneal Epithelium and Endothelium of Rabbit - By Scanning Electron Microscopy (천연보존제 나린진이 가토안의 각막 상피와 내피에 미치는 영향 - 주사전자현미경을 통한 고찰)

  • Kim, In-Suk;Yoo, Geun-Chang;Chae, Soo-Chul;Jeon, Chang-Jin
    • Journal of Korean Ophthalmic Optics Society
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    • v.10 no.1
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    • pp.63-69
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    • 2005
  • The effects of R products of B company and natural disinfectant naringin, well-known chemical disinfectant on Corneal endothelium and epithelium of rabbit were observed by scanning electron microscope. The main component of naringin is extract of grapefruit seed, which is one of the flavonoid widely recognized as natural antioxidants and used as preservative agent of food and cosmetics. The chemical disinfectants cytotoxicity in cell cultures were announced by MIT assay and LDH leakage assay. But there has been no study about that chemical disinfectants and natural disinfectants is inserted drops on rabbit's cornea directly. In this test R products B company and natural disinfectants has been dropped on the cornea of rabbits for one weeks and observed cytotoxiciy by light camera after rose bengal staining. Also, we analysed the damage of corneal epithelium and endothelium morphologically after enucleating the cornea by scanning electron microscope.

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Comparison of Skin Condition Before and After Use of Scrub Cosmetics and Microscopic Characteristics of Microbeads (스크럽 화장품의 사용 전과 후의 피부상태 비교와 이에 첨가된 마이크로비드의 현미경적 특성)

  • Kim, Hoon;Chang, Byung-Soo
    • Journal of Convergence for Information Technology
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    • v.9 no.6
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    • pp.211-217
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    • 2019
  • In this study, the change of skin condition was analyzed by skin analysis equipment using scrub cosmetics, and the morphological characteristics of microbead were observed by dermascope and scanning electron microscope. In the dermascope observation, during the process of cleansing, the microbeads attached to the skin existed in close contact with each other or dispersed. The skin after scrubbing was clean and smooth and the fine wrinkles between epidermal keratinocytes were reduced. In the scanning electron microscopic observation, the microbead surface did not have severe bending or rough surface. The skin moisture and oil content were higher than the scrub skin before the scrub, and there was no significant difference in the pH.

Two Unrecorded Speces of Hemicycliophora minora and Pratylenchoides ivanovae and Additional SEM Description of Pratylenchoides utahensis and Rotylenchus feroxcis from Korea (한국 미기록 선충 Hemicycliophora minora, Pratylenchoides ivanovae 2종 보고 및 Pratylenchoides utahensis와 Rotylenchus feroxcis의 주사전자현미경 관찰)

  • Kim Dong-Geun;Lee Joong-Hwan;Kim Seung-Han;Choi Jae-Sin
    • Korean journal of applied entomology
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    • v.44 no.1
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    • pp.5-11
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    • 2005
  • Hemicycliophora minora Wu, 1966 and Pratylenchoides ivanovae Ryss, 1980 are newly collected from Korea. Five species of Hemicycliophora and 3 species of Pratylenchoides were reported in Korea and key is given. Two preciously described species, Pratylenchoides utahenis Baldwin, Luc & Bell and Rotylenchus feroxcis Eroshenko were observed under the scanning electron microscope.