• Title/Summary/Keyword: taxonomic studies

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Purification and Production Conditions of Antimicrobial Compound from Methylotrophic Actinomycetes MO-16 (Methanol 자화방선균 MO-16으로부터 항균성 물질의 정제 및 생산조건)

  • 김현수;이정수
    • Microbiology and Biotechnology Letters
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    • v.27 no.5
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    • pp.391-398
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    • 1999
  • A methylotrophic actinomycetes strain MO-16, which produce the antimicrobial compound, was isolated from soil and supposed as Amycolatopsis sp. based on taxonomic studies. The cell-free extract of methanol-grown strain MO-16 showed dehydrogenase activity for methanol and formaldehyde when various electron acceptors were added for oxidation. On the other hand, methanol did not affect the production of antimicrobial compounds, and organic nitrogen sources such as corn steep liquor and peptone were better than inorganic nitrogen sources. These compounds showed broad antimicrobial spectrum to the tested strains such as bacteria and yeast. The antimicrobial comounds were very stable under heat(121$^{\circ}C$), acid(pH2.0), alkali(pH11.0) treatments. These compounds were isolated by ethylacetate extract, silica gel column chromatography and reverse phase HPLC. Two compounds(peak 1 and 2) were detected as antimicrobial compounds through the HPLC analysis. The peak 2 was purified as a single compound and revealed a 98% purity.

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Systematic Studies on the Bagrid Catfish (Siluriformes: Bagridae) from Korea III. Multivariate Analysis of Osteological Characters (한국산 동자개과 어류의 계통분류학적 연구 III. 골격형질의 다변량 분석)

  • 이충렬
    • The Korean Journal of Zoology
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    • v.32 no.3
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    • pp.252-257
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    • 1989
  • The five species of family Bagridae in Korea were analyzed by numerical taxonomic method based on the twelve osteological characters of 110 cleared specimens. Family Bagridae of Korea was classified into genera Pseudobagrus and Leiocassis. Genus Pseudobagrus has P. fulvidraco, Pseudobagrus sp. and P. brevicorpus, and Leiocassis also has L nitidus and L ussuriensis. P. brevicorpus represented more closely relationships to P. fulvidraco rather than Pseudobagrus sp. in the morphological features of skeleton.

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Taxonomic Studies on Three Caeneressa Species (Lepidoptera: Syntominae) from India with Special Reference to Their External Genitalia

  • Kirti, Jagbir Singh;Singh, Navneet;Joshi, Rahul
    • Animal Systematics, Evolution and Diversity
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    • v.30 no.1
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    • pp.33-38
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    • 2014
  • Caeneressa diaphana muirheadi (Felder) and Caeneressa brithyris (Druce) have been recorded for the first time from India. Further, a new combination viz. Caeneressa melaena (Walker) comb. nov., has also been proposed on the basis of external genitalic features. With these records, genus Caeneressa will be represented by five species from India, Caeneressa diaphana (Kollar), Caeneressa diaphana muirheadi (Felder), Caeneressa brithyris (Druce), Caeneressa melaena (Hampson) and Caeneressa swinhoei (Leech). The studied material was collected from North-Eastern states of India. Caeneressa brithyris (Druce) was collected near riverside at low altitude whereas the other two species were collected at high altitude.

TAXONOMIC STUDIES ON MICRO-LEPIDOPTERA OF KOREA (I) The family Oecophoridae with thirteen unrecorded species from Korea (한국산 미소나방류에 관한 분류학적 연구(I) 원뿔나방과의 우리나라 미기록 13종 정리)

  • Park Kyu-Tek
    • Korean journal of applied entomology
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    • v.20 no.2 s.47
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    • pp.87-97
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    • 1981
  • This study presents the first review of the family Oecophoridae, except the genus Promalactis which was reported previously by author, in Korea. From the result of the study thirteen species belonging to nine genera are reported for the first time from Koea. For the study a general characteristic of species was described and also genitalia of males or females were illustrated. Host plants of larva known to date are also listed.

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Chilli anthracnose (Colletotrichum spp.) disease and its management approach

  • Oo, May Moe;Oh, Sang-Keun
    • Korean Journal of Agricultural Science
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    • v.43 no.2
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    • pp.153-162
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    • 2016
  • Chilli is a widely consumed crop throughout the world. However, chilli anthracnose is a major constraint in chilli production leading to huge economic losses worldwide. Colletotrichum is a large genus of Ascomycete fungi, containing species that cause anthracnose diseases on a wide range of crops of economic value. This review is aimed at critically and accurately examining the taxonomic identification of Colletotrichum species by morphological and molecular approaches as well as assessing their management options. The use of appropriate integrated management practices, such as cultural, mechanical, chemical, and biological control, are important in chilli anthracnose disease prevention and control. Emphasis is laid on the use of biological control because it is cost effective and eco-friendly, and is an appropriate approach for disease management. The use of resistant cultivars is the cheapest, easiest, safest, and most effective means of controlling crop diseases. But, since no resistant cultivars of chilli have been developed and commercialized, it is very important to develop biological management strategies. Further studies leading to integrated disease management strategies need to be carried out.

Taxonomic Studies of Trichodoridae (Nematoda:Trichodoroidea) from Korea, with Descriptions of a New Species (한국산 궁침선충과의 분류학적 연구 및 1 신종 기재)

  • Hyun Sil Baek;Young Eoun Choi
    • Korean journal of applied entomology
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    • v.34 no.3
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    • pp.206-217
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    • 1995
  • A new species, Trichodorus jeonjuensis n. sp., resembles T. cedarus Yokoo, 1964, T. tricaulatus Shishida, 1979, and T. californicus Allen, 1957, from which it differs by male with three ventromedian cervical pores anterior to excretory pore. The spicules are straited all over and first supplement is located on half of spicules and the female has kidney shape vagina. T. tricaulatus Shishida, 1979 is newly reported from Korea. T. cedarus Yokoo, 1964 and paratrichodorus porosus (Alen, 1957) Siddigi, 1974 were found at several localities and some morphological data were compared by localities.

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Taxonomic Studies on Brackish Copepods in Korean Waters. I Redescription of Tortanus dextrilobatus Chen and Zhang, 1965 from Korean Waters, with Remarks on Zoogeography of the subgenus Eutortanus (한국산(韓國産) 기수성(汽水性) 소각류(燒脚類) 분류학적(分類學的) 연구(硏究) 1. 한국(韓國)에 있어서 미기록종(未記錄種) Tortanus dextrilobatus Chen and Zhang, 1965 기재(記載)와 Eutortanus 아속(亞屬)의 지리분포(地理分布)에 대하여)

  • OHTSUKA, SUSUMU;YOON, YANG HO;ENDO, YUKIHIRO
    • 한국해양학회지
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    • v.27 no.2
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    • pp.112-122
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    • 1992
  • The calanoid copepod Tortanus (Eutortanus) dextrilobatus Chen and Zhang, 1965, which had been recorded only from South China, is redescribed from brackish waters in South Korea. The diagnosis of the little known subgenus Eutortanus is presented hear. The zoogeography of five species of Eutortanus is also discussed.

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Taxonomic Studies on the Genus Russula of Korea (한국산(韓國産) 무당버섯속(屬)의 분류학적(分類學的) 연구(硏究))

  • Bok, Jin-Deok;Shin, Gwan-Chull
    • The Korean Journal of Mycology
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    • v.14 no.3
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    • pp.237-246
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    • 1986
  • Mushrooms were collected from those grown at Mt. Gyeryong, Mt. Chilgab, Mt. Ducyu, Mt. Chiri, Mt. Songri and at the regions of Chungnam Province during the period from July, 1983 to October, 1984. They were classified into 30 species, two varieties and one form of Russula. These species were grouped into eleven sections. Of the classified species, Russula subnigricans Hongo, R. albonigra (Kromb.) Fries, R. cyanoxantha (Kromb.) Fries, R. cyanoxantha var. peltereaui Singer and R. compacta Prost et Pk were newly recorded in Korea.

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A Systematic Study on the Paguroidea (Crustacea: Decapoda) in South Korean Water: Checklist and Geographical Distribution (한국산 집게상과(갑각아강: 십각목)의 분류학적 연구: 종목록 및 지리적 분포)

  • Jung, Jibom;Park, Jin-Ho;Kim, Won
    • Ocean and Polar Research
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    • v.40 no.3
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    • pp.145-160
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    • 2018
  • The Paguroidea is an important group in terms of marine biodiversity. In Korea, paguroids have been studied by many taxonomists and recently we conducted comprehensive taxonomic studies on hermit crabs from the southern part of the Korean Peninsula. As a result, a checklist of 61 species of Paguroidea in South Korean water with their geographical distribution was prepared. Remarks on taxonomy, geographical distribution, and the Korean scientific names of each applicable species were also provided.

New Recods of Hypotrichs from Korea (Protozoa, Ciliphora, Hypotrichida) (한국산 미기록 하모충류의 재기재)

  • Shin, Mann-Kyoon;Kim, Hoon-Soo;Kim, Won
    • Animal Systematics, Evolution and Diversity
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    • no.nspc3
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    • pp.15-22
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    • 1992
  • Some hypotrichous ciliates collected from the Han River and the Mountain Kwank were cultured at laboratory. They were identified as Paruroleptus lepisma Wenzel, 1953 and Euplotes aediculatus Pierson, 1943. These two species are reported for the first from Korea. Morphological and biometrical studies of them were carried out by observing both wild and cultured cells and the infraciliature of silver stained specimens. The two speices were redesribed and analyzed biometrically for their taxonomic characters.

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