• 대한치주과학회:학술대회논문집
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• 2004.11a
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• pp.151-152
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• 2004

• Journal of Plant Biology
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• v.19 no.3
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• pp.92-94
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• 1976

Elachista tenuis Yamada, epiphytic on Sargassum confusum, is reported for the first time in Korea. It forms hemispherical tufts by pseudoparenchymatous medulla and assimilatory filaments. The cells ofassimilatory filament are not constricted at septa, and nearly equal in breadth from base to apex. Plurilocular sporangia are rather abundant, while unilocular sporangia rare.

• Korean Journal of Veterinary Research
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• v.48 no.3
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• pp.317-321
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• 2008

Four 5 month old calves were died after showing respiratory distress after long-distance transportation at winter season. They were diagnosed as fibrinous lobar pneumonia caused by Mannheimia (M.) haemolytica. Grossly, lungs were attached onto the pleura by fibrin, with a rich yellowish fluid in thorax. The cut surface of the lung was showed marbled pattern of the reddish or greyish consolidation and widened interlobular septa by fibrin deposition. Histopathologically, parenchymal necrosis was delineated by a band of the degenerated inflammatory cells, and distended interlobular septa with serofibrinous exudates and vascular thrombosis with alveolar capillaries degeneration and abundant serofibrinous exudates in alveoli. M. hemolytica were isolated from all calves, and bovine viral diarrhea virus and parainfluenza type 3 virus in one calf were detected by RT-PCR. Thus, it was concluded that this case was diagnosed as pneumonic mannheimiosis suggested by complex infection with viruses after long-distance transportation and coldness.

• Microbiology and Biotechnology Letters
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• v.1 no.1
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• pp.19-23
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• 1973

This experiment was done to investigate the growth and the fine structural changes of Bacillus subtilis which were influenced by the penicillin with electromicroscope. The results were as follows; 1) The higher the concentration of penicillin the more prominent inhibition of the growth was observed. 2) The septa was not formed, derangements of synthesis of cell wall and cell membrane. 3) Cytoplasm was increased with swelling of cell body because of weakness of cell membrane induced by deranged synthesis of cell membrane. Some of the cells showed disruption of their membrane with loss of cytoplasm, remaining empty space, which suggest loss of cell function. 4) It can be suggested that penicillin had affected on the cell wall of Bacillus subtilis, and inhibited growth of the cell by deranging the formation of the cell wall.

• Animal Systematics, Evolution and Diversity
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• v.30 no.3
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• pp.183-190
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• 2014

The four species of the family Dendrophylliidae are newly recorded in Korea: Balanophyllia (Balanophyllia) cumingii Milne Edwards and Haime, 1848, Balanophyllia (Balanophyllia) vanderhorsti Cairns, 2001, Cladopsammia eguchii (Wells, 1982), and Cladopsammia gracilis (Milne Edwards and Haime, 1848). The two genera of Balanophyllia and Cladopsammia, to which the four species belong, are newly recorded in Korea. They were collected from the subtidal zones in Jeju-do Island, Korea by SCUBA diving from 1987 to 2012. This study aims to identify the four dendrophyllid species based on external and internal morphological characters including growth form, size, budding, and color of colonies, shape and size of corallites, columella, theca, and septa. Balanophyllia (Balanophyllia) cumingii is distinguished by its solitary growth form, small and low subturbinate corallite with enlarged calice, and expanded basal part, exsert first and second septa, and Pourtal$\acute{e}$s plan. Balanophyllia (Balanophyllia) vanderhorsti is characterized by its quasi-colonial growth form, subturbinate corallites with compressed calice, thick theca, and Pourtal$\acute{e}$s plan. Cladopsammia eguchii is characterized by its phaceloid growth form of compressed corallites basally united with common coenosteum, flat spongy columella, thick theca, and Pourtal$\acute{e}$s plan. Cladopsammia gracilis is distinguished by its phaceloid growth form of corallites basally united with common coenosteum, and pronounced Pourtal$\acute{e}$s plan forming flower patterns.

• Korean Journal of Bronchoesophagology
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• v.7 no.1
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• pp.59-61
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• 2001

Lipomas is one of the most common benign neoplasm in the body, but only rarely occurs in the oral cavity We report here a case of a 49-year-old female with a lipoma of palatine tonsil. Microscopical examination revealed a stromal neoplasm composed of mature fat with the presence of a few thin and anastomosing fibrous septa. The surface epithelium was of nonkeratinizing stratified squamous type. There was the dense fibrous connective tissue between mature fat and surface epithelium. The histopathologic findings and literature on tonsillar lipoma is reviewed.

• Journal of radiological science and technology
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• v.22 no.1
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• pp.5-11
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• 1999

This paper reviews recent major activities on instrumentation and methodology of PET. The performance of the PET instrumentation can be expressed by four physical characteristics, 1) spatial resolution, 2) coincidence resolving time, 3) energy resolution, and 4) detection efficiency. The physical and technical aspects of PET systems are briefly discussed along with these characteristics. Toward high resolution PET the recent trend has been to design multiple rings of densely packed detector arrays with scintillators. In order to satisfy the sampling requirement in reconstruction, continuous detector units has been developed. Iterative image reconstruction algorithms have received considerable attention for improvement of both the sampling requirement and image quality toward the stationary PET. Better resolving time improves the maximum true coincidence rate, which is also increased with more detectors placed in coincidence with each other. It suggests that volume PET is promising for enhancement of detection efficiency. The scattered coincidence event rate may be reduced by using detectors with better energy resolution. The use of interplane septa, however, takes over improvement of energy resolution in 2D PET. Energy resolution becomes an important factor for image quality under the condition of septa removal such as volume PET. Toward full utilization of emitting photons, 3D reconstruction incorporating oblique rays has been studied, and volume reconstruction algorithms have been developed. Practical volume PET systems impose heavy burden not only to detector sets and coincidence circuits, but also to computers in the memory requirements and the data processing. In conclusion, there have been many ingenious methods in development of PET instrumentation, which are based on unique capability of PET. They will be expected to overcome technical limitations, and to approach the fundamental limits.

• Research in Plant Disease
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• v.16 no.1
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• pp.94-96
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• 2010

In May of 2004 through 2007, Leptosphaerulina leaf blight caused by Leptosphaerulina trifolii occurred on Kentucky bluegrass (Poa pratensis) at golf courses in Gangwon Province, Korea. Symptoms on the turfgrass caused by L. trifolii were leaf blights, dying from the leaf tip downwards to the crown, which appeared patches in the field because of local pockets of severely infected (blighted) grass. Perithecia were produced on old or weak leaves, including club-shaped asci, each of which contained 8 pale brown muriform ascospores with cross and longitudinal septa. Ascospores of the fungus isolated from the diseased leaf tissue and cultured on potato-dextrose agar (PDA) were muriform multicellular (composed of 3-6 cells) and $23.4-40.5{\times}7.8-15.6{\mu}m$ in size with 3-4 transverse and 0-3 longitudinal septa, which were morphologically identical to L. trifolii reported previously. DNA sequences of ribosomal RNA gene (internal transcribed spacer) of the fungus were homologous with similarity of 99% to those of L. trifolii isolates in GenBank database, confirming the identity of the causal agent of the disease. Pathogenicity of the fungus was also confirmed on the creeping bentgrass by Koch's postulates. This is first report of Leptosphaerulina leaf blight on turfgrass caused by L. trifolii in Korea.

• Conservation Science in Museum
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• v.22
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• pp.1-14
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• 2019

The excavation of the south mound of Hwangnamdaechong Tomb in Gyeongju has yielded diverse types of shell artifacts. Among the them, this paper investigated fragments of shell ornaments with gilt-bronze frames, the use of which has not been identified. It was revealed that the artifacts are in fact nautilus cups, which had never been found previously in excavations in Korea. A nautilus is a species marine mollusk known to be the closest to prehistoric ammonites. It has brown stripes on the surface of the shell and septa inside, and a siphuncle penetrating to the center of the septa. It is known that nautilus cups were made and used in China, but only three examples have thus far been identified. These surviving cups have metal ornaments and are dated to the Western and Eastern Jin periods of China. No nautilus cups have been found in Japan, and the shell ornaments investigated in this study were determined to be the first nautilus cups ever found in Korea. Nautilus cups are mentioned in ancient documents and literature, including in poems by the Tang Dynasty poet Li Bai and in Joseon-period documents. This paper presents the biological characteristics of nautili, cases of excavation of nautilus cups outside Korea, and findings from the basic research of the nautilus cup from Hwangnamdaechong Tomb.

• The Journal of the Korean Society for Microbiology
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• v.19 no.1
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• pp.1-10
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• 1984

The occurrence of Hemorrhagic fever with renal syndrome was noted for the first time among the United Nations troops in Korea in 1951. In 1976, Lee and Lee demonstrated for the first time an antigen in the lungs of a striped field mouse, Apodemus agrarius, which gave specific immunofluorescent reactions with sera from patients convalescent from Korean hemorrhagic feve (KHF). The natural reservoir host of KHF is Apodemus agrarius coreae mice in rural endemic areas in Korea. Clinical manifestations of acute illness do not occur in infected Apodemus agrarius. Infected rodents excrete large amounts of virus in saliva, in urine and in feces for a long period of time. In this study, the tissues of Apodemus agrarius, Wistar rat and Balb/C mouse were inoculated with Hantaan virus and subsequently observed for any histopathologic findings. 1. In lungs, infiltration of lymphocytes in alveolar septa and peribronchial region and thickening of and giant cell formation in alveolar septa were observed. 2. In kidney, vascular congestion, interstitial hemorrhage in corticomedullary junction and partial microscopic hemorrhage in urinary space were found. 3. In spleens, vascular congestion, old and recent hemorrhage and multinucleated giant cell formation were seen.