구조용 중탄소강 SM45C의 열처리에 따른 기계적 성질변화

전상조,이임균,김송희 江原大學校 産業技術硏究所 1986 産業技術硏究 Vol.6 No.-

The aim of this study is to find out the relationships between the microstructures of SM45C(AIS11045) steel and fatigue crack propagation behaviour. Three microstructures such as (ⅰ) as received (fully annealed). (ⅱ) water quenched and tempered, and (ⅲ) ail quenched and tempered were used for fundamental mechanical testing and fatigue crack proagation test. The microstructures of (ⅱ) and (ⅲ) showed superior in tensile strength to (ⅰ). Resistance against fatigue crack propagation was higher in structure (ⅰ), while tensile properties were better in structures(ⅱ) and (ⅲ). It is believed due to that the enhancement of roughness of fracture surface obsered in structure (ⅰ) increases ?Kth and lowers fatigue crack growth rate. However it does not necessarily mean the quenched and tempered structures (ⅱ) and (ⅲ) are undesirable for the engineering component because fatigue limit in low cycle test appears usually higher in the microstructures of higher strength.

月城과 舒川의 附着動物에 관한 硏究

宋浚任 梨花女子大學校 韓國生活科學硏究院 1985 韓國生活科學硏究院 論叢 Vol.36 No.-

본 연구는 月城원자력발전소와, 舒川화력발전소의 취수구에 1984년 10월초 실험부착판을 설치하여 1985년 6월까지 附着動物의 種 組成과 郡集生態를 조사하였다. 조사결과, 附着動物은 月城에서 8門 10綱 17目 43科 70種으로 Mytilus, Balanus와 단체해초류의 부착이 현저하고, 舒川에서는 10門 14綱 20目 48科 62種으로 말미잘類, Chlamys, 군체해초류와 端脚類 접관의 부착이 현저하다. 月別에 따른 변화를 보면 月城에서는 초기단계의 粘性被膜이 점점 두꺼워지고, 새로운 附着動物群의 출현이 빠르지만, 舒川에서는 초기단계의 端脚類 棲管이 점점 두껍게 형성되면서 付着動物群의 출현은 늦다. 附着動物을 형태학적 특징에 따라 類型으로 보면 다음과 같은 천이과정을 알 수 있다. 月城 : CcS→Mssv=Mslf→Mtl→Mslv=Mssf 舒川 : Mts,Ccs→Mssv=Mtl→Mslf=Cct→Mslv=Mssf 舒川은 月城보다 늦은 속도로 遷移되고 있으며 최종적인 優占種은 Mytilus edulis(Mslv)일 것으로 본다. 본 연구는 韓國科學技術院 化學硏究所 硏究事業의 일환으로 수행되었으며, 조사과정 동안 도움을 주신 韓國科學技術院 化學硏究所 分析室長 김풍작 博士님과 그 室員, 韓國電力公社 拉術硏究院 김은아部長님 과 송영문科長님께 謝意를 表한다. To understand the changes of the species composition and the morphology of fouling animals community, a series of studies were carried out at the intake of Wolso˘ng Nuclear Power Plant and So˘ch'o˘n Thermal Power Plant from October, 1984 to June 1985. As a result, 70 species, 43 families, 17 orders, ten classes in eight phyla at Wolso˘ng, and 62 species, 48 families, 20 orders, 14 classes in ten phyla at So˘ch'o˘n were observed during the studv period. Some outstanding group of animals were Wytilus, Balanus and solitary ascidians at Wolso˘ng, and Chlamys, sea anemones, compound ascidians and tubes of amphipods at So˘ch'o˘n. The changes cf species were appeared to be early at Wolso˘ng, eastern coast of Korea. Therefore, it seems the last dominant species of fouling animals is Mytilus edulis.

중금속오염을 고려한 온산만 조간대 및 아조대의 무척추동물 군집분석

박중기,이인숙,박경숙,송준임,최병래,노분조 이화여자대학교 환경문제연구소 1997 이화환경연구 Vol.1 No.-

한국 동해연안의 하나인 온산만 지역의 해양오염 실태를 파악하기 위해 저서동물 군집구조에 대한 정성, 정량적 분석을 실시하였다. 분석결과 조사지역별 습중량-개체수의 누적 κ-dominance curve 변화양상을 근거로 판단해 분석한 결과, 온산만의 내만에 위치한 춘도는 여름, 겨울 오후에 ()어서 오염지역으로, 대조군인 당사는 비오염지역,()각각 판정되었다. 이외에도 조사지역별 출현() () 있어서 대조구인 당사지역에 비해 춘도의 생물상이 ()대적으로 빈약하였으며 연체류중 패각만 채집된 ()에 있어서도 각각 춘도에서 16종, 당사에서는 (0로 커다란 차이를 나타내었다. 온산만에 대한 이러한 저서동물 군집결과는 이 주변의 비철금속 및 석유화학 공업단지로부터 ()입된 중금속으로 인하여 해수 및 생물농축량이 누적됨으로써 나타나는 중금속의 높은 농도와 관련이 있을 것으로 추측된다. The qualitative and quantitative analyses of macrozoobenthic communities sampled from Onsan bay of the eastern coast of Korea were conducted, in this study, to investigate the status of marine pollution. In each survey site, judging from the results of the combined κ-dominance curve for species biomass and individual numbers, it may be assessed that Chundo island, located in innerside of Onsan bay, was in the state of polluted condition both in the summar and winter seasons; on the other hand, Tangsa, the control site of this study, was in the state of unpolluted condition. The species composition of the Chundo island, in addition, was rather lower than that of the Tangsa in richness and showed critical differences with the control site in the number of molluscan species collected as dead shell(16 spp. from Chundo island; 2spp. from Tangsa respectively) It is inferred that the resultant macrozoobenthic community structure of the Onsan bay was related to the high concentration of heavy metals in seawater and bioaccumulation, attributed to the influx of the heavy metals from the surroundings, the nonferrous and the petrochemical industrial complex.

New Records of Cold-Water Corals from Korea

Song, Jun-Im The Korean Society of Systematic Zoology 2016 Animal Systematics, Evolution and Diversity Vol.32 No.3

Two cold-water coral taxa, Octocorallia in the class Anthozoa and Stylasteridae in the class Hydrozoa, were identified. Deep-water samples were collected in fishing nets at depths ranging between 20 and 200 m along the coasts of the East Sea in Korea from 1976 to 1993. The two species found in this study represent new records for Korea: Paragorgia arborea (Linnaeus, 1758) in the class Anthozoa, and Stylaster profundiporus Broch, 1936 in the class Hydrozoa. Two families, Paragorgiidae and Stylasteridae, are also newly recorded in Korea. Furthermore, the species name of another cold-water gorgonian species, Primnoa pacifica (Kinoshita, 1907) in the family Primnoidae, is amended in this report. The two newly recorded cold-water coral species from Korea are described in detail based on their morphological characteristics. Paragorgia arborea is characterized by its growth form, medulla and cortex, zooid dimorphism, canal system, and spicule composition. Stylaster profundiporus is distinguished by its external skeletal characteristics, such as the coordination of dactylopores and gastropores, presence or absence of gastrostyles and dactylostyles, cyclosystem orientation, ampullar position, gastropore tube shape, and coenosteal texture.

Geographic Variation of Granulilittorina exigua (Littorinidae, Gastropoda) in Korea Based on the Mitochondrial Cytochrome b Gene Sequence

Song, Jun-Im,Suh, Jae-Hwa,Kim, Sook-Jung The Korean Society for Integrative Biology 2000 Korean journal of biological sciences Vol.4 No.3

Partial sequence of the mitochondrial cytochrome b gene was analyzed to investigate genetic variation from 10 geographic populations of Granulilittorina exigua in Korea. The sequence of 282 base pairs was determined by PCR-directed silver sequencing method. The sequences of two species within the genus Littorina reserved in NIH blast search were utilized to determine geographic variations of species referred. The levels of mtDNA sequence differences were 0.00-2.54% within populations and 0.71-4.43% between populations. There were four amino acid differences between representative species of the genera Granulilittorina and Littorina, but no differences within populations of the genus Granulilittorina. The UPGMA and the N-J trees based on Tamura-Nei genetic distance matrix were constructed, which showed that the genus Granulilittorina was divided into three groups such as eastern (even exception for Tokdo population), southern, and western regional populations. The degrees of genetic divergence within populations of each group were p=0.021, p=0.019, and p=0.018, respectively. The divergence between the eastern and southern populations was p=0.032, showing closer relationship than with the western populations (p=0.052). Based on the diverged time estimation, the eastern and southern populations of Granulilittorina exigua in Korea diverged from the western populations about 2.1 MYBP, and the eastern and southern populations diverged from each other about 1.3 MYBP.

Systematic Relationships among Species of the Genus Dendronephthya (Alcyonacea: Octocorallia; Anthozoa) Based on RAPD Analysis

Song, Jun-Im,Lee, Young-Ja The Korean Society for Integrative Biology 2000 Korean journal of biological sciences Vol.4 No.1

The genus Dendronephthya, generally known as soft corals, is reported as an abundant and variable taxon. They mostly distribute in warmer waters of the Undo-Pacific Ocean region including Korea. In spite of their abundance and ecological importance as habitats of marine organisms, there are difficulties in the study of their identification and systematics because they have morphological variabilities and limited taxonomec characters. To resolve the problems, we attempted to elucidate the genetic relationships in the genus Dendronephthya by using random amplified polymorphic DNA (RAPD) analysis. This study was based on eight dendronephthian species and one Alcyoniidae species, Alcyonium gracillimum, as an outgroup. The results from all analysis suggest that they could be classified into four groups by the growth form and the anthocodial grades as follows: the first one,D. putteri and D. suensoni with the divaricate form and VI grade; the second one,D. sp.1 and D. sp.2 with the divaricate form and III or IV grade; the third one, D. gigantea and D. aurea being closer than D. spinifera with the glomerate form and III grade; the last one, D. castanea related to D. gigantea rather than D. putteri with the umbellate form and IV grade. Moreover, the divaricate form was separated from the group of the glomerate and umbellate form. At the intraspecies level, the types of the D. castanea, D. gigantea and D. spinifera were separated depending on the feature of spicules in the polyp head, and the coloration could not influence genetic variation. From this study, we can confirm that their morphological characters are compatible with the genetic variation, also RAPD analysis is a very useful method for resolving the systematic relationships of den-deonephthians.

Systematic Study on Anthozoa from the Korea Strait in Korea

Song, Jun-Im(宋浚任) 한국동물분류학회 1992 Animal Systematics, Evolution and Diversity Vol.8 No.2

New Records of Cold-Water Corals from Korea

Jun-Im Song 한국동물분류학회 2016 Animal Systematics, Evolution and Diversity Vol.32 No.3

Two cold-water coral taxa, Octocorallia in the class Anthozoa and Stylasteridae in the class Hydrozoa, were identified. Deep-water samples were collected in fishing nets at depths ranging between 20 and 200 m along the coasts of the East Sea in Korea from 1976 to 1993. The two species found in this study represent new records for Korea: Paragorgia arborea (Linnaeus, 1758) in the class Anthozoa, and Stylaster profundiporus Broch, 1936 in the class Hydrozoa. Two families, Paragorgiidae and Stylasteridae, are also newly recorded in Korea. Furthermore, the species name of another cold-water gorgonian species, Primnoa pacifica (Kinoshita, 1907) in the family Primnoidae, is amended in this report. The two newly recorded cold-water coral species from Korea are described in detail based on their morphological characteristics. Paragorgia arborea is characterized by its growth form, medulla and cortex, zooid dimorphism, canal system, and spicule composition. Stylaster profundiporus is distinguished by its external skeletal characteristics, such as the coordination of dactylopores and gastropores, presence or absence of gastrostyles and dactylostyles, cyclosystem orientation, ampullar position, gastropore tube shape, and coenosteal texture.

First Report of Pseudocladochonus hicksoni Versluys from Korea

Song, Jun-Im(宋俊任) 한국동물분류학회 1992 Animal Systematics, Evolution and Diversity Vol.8 No.1

A Study on the Classification of the Korean Anthozoa: 2. Alcyonacea

Song, Jun-Im The Korean Society for Integrative Biology 1976 동물학회지 Vol.19 No.2

1963년 10월부터 1975년 5월까지 東海와 南海沿岸으로부터 채집된 標本들을 同定한 결과 1目 3科 5屬 8種을 얻었다. 이들은 모두 韓國未記錄種이었으며 다음과 같은 종들이다. Bellonella rubra Brundin, 1896; B, rigida putter, 1900; B. unicolor (Kukenthal, 1906); Alcyonium gracillimum Kukenthal, 1906; Paraspongodes spiculosa (Kukenthal, 1906); P. hitotai (Utinomi, 1951); Dendronephthya pectinata (Holm, 1895); Siphonogorgia dofleini Kukenthal, 1906. A study on the classification of the Korean anthozoans is based on the materials which were collected during the period from October 1963 to May 1975 in the coastal seas of the South Sea and the East Sea of the South Korea. The results of the identification were turned out to be eight species, five genera, three families and one order. They are all unrecorded species in Korean anthozoan fauna. The newly recorded species are as follows: Family Alcyoniidae: 1. Bellonella rubra Brundin, 1896; 2. B. rigida Putter, 1900; 3. B. unicolor (Kukenthal, 1906); 4. Alcyonium gracillimum Kukenthal, 1906; Family Nephtheidae: 5. Paraspongodes spiculosa (Kukenthal, 1906); 6. P. hirotai (Utinomi, 1951); 7. Dendronephthya pectinata (Holm, 1985); Family Nidaliidae: 8. Siphonogorgia dofleini Kukenthal, 1906.