1.A Case of Woolly Hair.
Sang Chin LEE ; Jong Yuk YI ; Si Yong KIM ; Baik Kee CHO ; Kye Yong SONG
Annals of Dermatology 1994;6(2):236-239
No abstract available.
Hair*
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Microscopy, Electron
2.The effect of Er:YAG laser irradiation on the surface microstructure and roughness of TiO2 implant.
Jang Hyuk AN ; Young Hyuk KWON ; Joon Bong PARK ; Yeek HERR ; Jong Hyuk CHUNG
The Journal of the Korean Academy of Periodontology 2008;38(1):67-74
PURPOSE: The aim of this study was to evaluate the effect of Er:YAG laser on microstructure and roughness of TiO2 blasting implant surface. MATERIALS AND METHODS: Ten TiO2 blasting implant were used in this experiment. One implant was control group, and nine TiO2 blasting implant surfaces were irradiated with Er:YAG laser under 100 mJ/pulse, 140 mJ/pulse, and 180 mJ/pulse condition for 1 min, 1.5 min, and 2 min respectively. Optical interferometer and scanning electron microscopy was utilized to measure roughness and microstructure of specimens. RESULTS: The surface roughness was decreased after Er:YAG laser irradiation in all groups, but there was no significant difference. 100 mJ/pulse and 140 mJ/pulse group did not alter the TiO2 blasting implant surface in SEM study while 180 mJ/pulse group altered the TiO2 blasting implant surface. Implant surfaces showed melting, microfracture and smooth surface in 180 mJ/pulse group. CONCLUSION: Detoxification of implant surface using Er:YAG laser must be irradiated with proper energy output and irradiation time to prevent implant surface alteration.
Freezing
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Microscopy, Electron, Scanning
3.Marginal Adaptation Of The Conical Inner Crown Fabricated With Cad/cam.
The Journal of Korean Academy of Prosthodontics 2002;40(1):30-41
This study was to evaluate the fabrication method and marginal adaptation of the conical inner crown fabricated with CAD/CAM.The informations on abutment teeth were transferred to a computer with a micro contact digitizer,which had a 50mum accuracy on the master die.A conical inner crown was designed on a computer and a real crown was machined based on this design using CAM. The marginal fit of a computer-machined conical inner crown was assessed using electron microscopy. Measurement of the marginal gap between the conical inner crown and the abutment was performed on four different locations (mesial,distal,buccal,and lingual surfaces)of the finish line. The evaluation was based on 10 test specimens. The results were as follow. 1.The mean marginal gap between the conical inner crown and abutment tooth was 83.2 +/-43mum,28.9%of the specimen showed marginal gap over 100 m. 2.The fabrication method using CATRS and CAM provided clinically acceptable marginal fitness compared to conventional casting method (p<0.05).
Crowns*
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Microscopy, Electron
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Tooth
4.Morphology of the Terminal Segments of Megaselia scalaris (Loew) (Diptera: Phoridae) using Scanning Electron Microscopy
Raja Muhammad Zuha ; Atiah Ayunni Abdul Ghani
Malaysian Journal of Health Sciences 2016;14(2):141-143
Megaselia scalaris (Loew) (Diptera: Phoridae) is a cosmopolitan scuttle fly of medical and forensic importance. This species is generally small, humpbacked and is a prominent decomposer of corpses indoors. Taxonomically, adult sexes can be distinguished based on the characteristics of the terminal segments of the abdomen. In this report, the terminalia of adult male and female M. scalaris were examined using scanning electron microscope (SEM). The terminal segment of an adult female is less complex compared to male, consisting of an ovipositor and cerci. In male, the hypopygium consists of epandrium, hypandrium, anal tube and penis complex. A pair of long and feathered setae was attached to the tip of the anal tube and tapered. The application of SEM to identify this species isuseful and can be expanded to other species in this fly group.
Microscopy, Electron, Scanning
5.The genus Hypoxylon, Wood Decay Fungi - II. Teleomorph of Annulata Section.
Mycobiology 2000;28(1):1-4
The section of Annulata under genus Hypoxylon is a member of the Xylariaceae which has ascomata with ostioles papillate ill a flattened disc. The isolates of Hypoxylon collected from the Tropic to the Temperate are compared with similar taxa and described. These isolations under Annulata section are illustrated with a light microscopy and a scanning electron microscopy. Hypoxylon archeri is newly recorded from Korea. A key to the species is also included.
Fungi*
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Korea
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Microscopy
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Microscopy, Electron, Scanning
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Wood*
6.The High-Voltage Electron Microscopy in Biomedical Research.
Hyun Wook KIM ; Jee Woong KIM ; Im Joo RHYU
Korean Journal of Anatomy 2009;42(2):73-81
Transmission electron microscopy (TEM) provides high resolution images, which are useful in studying ultrastructure of cells and tissues. We have to use very thin section about 60~100 nm thickness due to poor penetration power of the conventional TEM at 100 kV. To overcome this limitation, TEMs using higher accelerating voltage have been developed. TEMs can be categorized into conventional TEM, intermediate TEM, high voltage TEM (HVEM), and ultrahigh voltage TEM according to their accelerating voltage. HVEM using 500~1,000 kV has an enough penetration power to observe thick specimen up to 3~4 micro, which is useful understanding 3 dimensional configuration of the cell and tissue. HVEM was built up in Korea Basic Science Institute (KBSI, Daejeon, Korea) at 2004, maximum accelerating voltage is 1.3 MV in Korea. Many results showed up to the present various fields of science such as medical science, biology, agriculture and so on. Here, we briefly summarize recent biomedical applications of HVEM to provide an insight of HVEM for morphologist.
Agriculture
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Biology
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Electrons
;
Korea
;
Microscopy, Electron
;
Microscopy, Electron, Transmission
7.Comparison of mechanical properties of a new fiber reinforced composite and bulk filling composites.
Hazem ABOUELLEIL ; Nelly PRADELLE ; Cyril VILLAT ; Nina ATTIK ; Pierre COLON ; Brigitte GROSGOGEAT
Restorative Dentistry & Endodontics 2015;40(4):262-270
OBJECTIVES: The aim of this study was to evaluate the mechanical and physical properties of a newly developed fiber reinforced dental composite. MATERIALS AND METHODS: Fiber reinforced composite EverX Posterior (EXP, GC EUROPE), and other commercially available bulk fill composites, including Filtek Bulk Fill (FB, 3M ESPE), SonicFill (SF, Kerr Corp.), SureFil (SDR, Dentsply), Venus Bulk Fill (VB, HerausKultzer), Tetric evoceram bulk fill (TECB, Ivoclar Vivadent), and Xtra Base (XB, Voco) were characterized. Composite samples light-cured with a LED device were evaluated in terms of flexural strength, flexural modulus (ISO 4049, n = 6), fracture toughness (n = 6), and Vickers hardness (0, 2, and 4 mm in depth at 24 hr, n = 5). The EXP samples and the fracture surface were observed under a scanning electron microscopy. Data were statistically analyzed using one-way ANOVA and unpaired t-test. RESULTS: EXP, FB, and VB had significantly higher fracture toughness value compared to all the other bulk composite types. SF, EXP, and XB were not statistically different, and had significantly higher flexural strength values compared to other tested composite materials. EXP had the highest flexural modulus, VB had the lowest values. Vickers hardness values revealed SF, EXP, TECB, and XB were not statistically different, and had significantly higher values compared to other tested composite materials. SEM observations show well dispersed fibers working as a reinforcing phase. CONCLUSIONS: The addition of fibers to methacrylate-based matrix results in composites with either comparable or superior mechanical properties compared to the other bulk fill materials tested.
Hardness
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Microscopy, Electron, Scanning
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Venus
8.Introduction to Recent Studies on the Fine Structures of Ocular Tissues.
Journal of the Korean Ophthalmological Society 1975;16(3):167-177
Outstanding reports on the findings of the finer structures of every ocular tissue by the electron microscope with transmission, scanning, replica, and other measures are reviewed. Among them, description on the retinal tissue is detailed in part. An application of the electron microscopy to the histopathological diagnosis is a newly developed field with amazing results and some features on the ophthalmic pathology are briefly intrdouced.
Diagnosis
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Microscopy, Electron
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Pathology
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Retinaldehyde
9.Congential Self-Healing Histiocytosis.
Hae Seung PAIK ; Hong Yoon YANG ; Chan Kum PARK
Annals of Dermatology 1995;7(2):177-180
A case of congenital self-healing histiocytosis was studied with S-100 antibody and electron microscopy. Many tumor cells were positive for S-100 protein and a few contained Birbeck´s grandles and dense bodies. A pathlogic fracture was first noticed on the seventh day. The lesions involuted spontaneously by the end of a weeks
Histiocytosis*
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Microscopy, Electron
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S100 Proteins
10.Electron Microscopy Pathology of ADSSL1 Myopathy.
Hyung Jun PARK ; Jee Eun LEE ; Gyeong Seon CHOI ; Heasoo KOO ; Soo Jeong HAN ; Jeong Hyun YOO ; Young Chul CHOI ; Kee Duk PARK
Journal of Clinical Neurology 2017;13(1):105-106
No abstract available.
Microscopy, Electron*
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Muscular Diseases*
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Pathology*