• 한국양식학회지
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• 제20권3호
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• pp.168-172
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• 2007

해산어의 종묘생산 과정에서 로티퍼 B. rotundiformis와 코페포다 T. japonicus는 매우 대표적인 동물먹이생물이다. 그리고 이 두 종의 혼합배양 방법은 대량배양과 안정배양을 목적으로 하였을 때 매우 유용한 방법으로 널리 알려져 있다. 이 연구에서는 로티퍼 B. rotundiformis와 코페포다 T. japonicus의 혼합 배양 과정에서 미칠 수 있는 배양조건으로서 광주기가 미칠 수 있는 영향을 검토하였다. 그 결과 로티퍼 B. rotundiformis와 코페포다 T. japonicus의 혼합 배양에서는 배양 환경 조건 중 광주기 조건에 따라서 혼합배양수조내 로티퍼와 코페포다의 증식 양상이 매우 달라짐을 알 수 있었다. 로티퍼의 증식율을 비교하면 반일 광주기 조건의 최고 밀도에 비하여 전일 광주기 조건하에서 로티퍼의 최고 밀도는 200% 이상 향상되는 것을 알 수 있었다. 그러나 코페포다 T. japonicus의 증식은 12L:12D<24L:0D<0L:24D의 순으로 전일 암주기 조건의 광주기 조건하에서 가장 높은 증식이 관찰되었다. 그리고 코페포다의 증식과정을 각 발생 단계별로(nauplii, copepodites 그리고 female carrying eggs) 계수한 결과, 세 가지 광주기 조건별로 각 발생단계별(nauplius, copepodid 그리고 female carrying eggs)의 증식 양상은 매우 큰 차이를 보였다.

• Animal cells and systems
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• 제8권3호
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• pp.155-163
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• 2004

Tenuidraconema koreensis, a new species of free-living marine nematodes, collected from the subtidal coarse sediments and various invertebrates of Namae, is described. The new species differs from T. fiersi Decraemer, 1989, the only other species in the genus, by having the combination of the following characters: the position of twelve cephalic adhesion tubes in both sexes (anterior six cephalic adhesion tubes inserted on the rostrum and posterior six inserted on the body annules), and the number of posterior sublateral adhesion tubes (12 in male and 13 in female) and posterior subventral adhesion tubes (15 in male and 19 in female). This paper contains the description of the new species with illustrations and scanning electron microscope (SEM) photomicrographs. This is the first discovery of the monotypic genus Tenuidraconema outside the type locality.

• The Korean Journal of Ecology
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• 제22권6호
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• pp.349-354
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• 1999

The spatial distributions of allelic frequencies and ecological traits by randomization were studied in the natural population of two species (Pinus rigida and Pyrola japonica). Both species showed significant positive spatial autocorrelation as measured by Moran's I. In P. rigida, the genetic similarity was shown in individuals within up to a scale of 18 m distance and this is partly due to combination of pollen and seed dispersal by wind or men. In P. japonica, significant spatial autocorrelation was consisted of a scale of 8 m intervals. These population structure in the distribution of allelic frequencies is related to mating systems such as outcrossing and vegetative spread. The results also indicate that positive species associations between P. rigida and P. japonica can occur when both species select the same habitat or require the same environmental conditions.

• 한국어류학회지
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• 제12권2호
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• pp.89-95
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• 2000

한국산 새코미꾸리속 Koreocobitis에는 새코미꾸리 Koreocobitis rotundicaudata와 얼룩새코미꾸리 (신종) K. naktongensis 2종이 분포한다. 신종인 얼룩새코미꾸리는 새코미꾸리에 비해 갈색의 얼룩무늬반점, 절단형의 꼬리지느러미 후연, 척수골 수의 감소, 긴 두부 등에서 형태적인 뚜렷한 차이를 보여 주고 있으며, 낙동강에만 제한 분포하고 있어 생물지리적으로 주목된다. 또한 이들 2종에 대한 검색표와 함께 형태적 특징을 기재하였다.

• Animal cells and systems
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• 제16권3호
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• pp.245-253
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• 2012

A genuine interstitial cyclopoid species belonging to the genus Psammophilocyclops Fryer, 1956 is recorded from the filtration basin of a water treatment plant, South Korea. The genus Psammophilocyclops is very rarely found, and only three species have been recognized as yet: P. boccaroi Fryer, 1956 from Africa, P. trispinosus Shen et Tai, 1964 and P. bispinosus Shen et Tai, 1964 from China. The present new species differs from the congeneric species by the character combination of 11-segmented antennule in female, four-segmented maxilliped with 2,1,1,2 setation, the spine formula of 3,3,3,3, and setal arrangement of 3,3,5,3 on the distal endopodal segments of legs 1-4. Descriptio and taxonomic accounts of the new species are presented with a revised generic diagnosis and a key to the species hitherto known in the genus.

• Mycobiology
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• 제51권3호
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• pp.122-138
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• 2023

Elsinoë are plant pathogenic fungi that cause scabs, spotted anthracnose, and some morphological distortions on various plants, including woody plants, economically important crops, and ornamental plants. Taxonomical reexamination of Elsinoë species in Japan has not yet been conducted based on the modern species criteria. In this study, several Japanese isolates were reexamine based on the morphological and molecular-phylogenetic analysis of the internal transcribed spacer region (ITS), large subunit gene (LSU)m and protein-coding gene such as RNA polymerase II subunit (rpb2) and Translation elongation factor 1-alpha (tef). Japanese isolates were divided into four clades and three new species, Elsinoë hydrangeae, E. sumire, and E. tanashiensis were proposed. One species, Sphaceloma akebiae, was transferred to the genus Elsinoë.

• 대한미생물학회지
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• 제19권1호
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• pp.35-40
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• 1984

The effectiveness of three antifungal antibiotics amphotericin B, clotrimazole and 5-fluorocytosine was tested against 120 clinical isolated Candida species. The minimum inhibitory concentrations of amphotericin B was considerably lower than those of clotrimazole and 5-fluorocytosine. High-level resistance to 5-fluorocytosine was present in 50% of the isolates. The combination of clotrimazole and 5-fluorocytosine produced synergistic inhibition against all 20 strains of Candida albicans tested that were relatively resistant to both antifungal agents.

• 식물분류학회지
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• 제47권1호
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• pp.23-26
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• 2017

We reported an unrecorded plant species, Galium bungei var. miltorrhizum (Hance) Jeong & Pak in Korea. This species is found in Gyeonggi-do, Chungcheongbuk-do, Jeollabuk-do, Gyeongsangbuk-do, and Gyeongsangnam-do. G. bungei var. miltorrhizum is distinguished from related taxa by glabrous stem and glabrous or rarely short papillate mericarps. This taxon was named 'Dung-geun-ne-ip-gal-kwi' in Korean based on shapes of leaves. We provided a description, illustrations, photographs, and a key of related taxa in Korea. And we propose a new combination (Galium bungei var. miltorrhizum).

• 한국환경복원기술학회지
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• 제2권4호
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• pp.54-63
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• 1999

This study was conducted to suggest the ecological restoration and environmentally friendly revegetation technology for the rock-exposed cut-slopes by the Natural Topsoil Restoration Methods (NTRM) with the following restoration objectives; (1) prevention or reduction of wind and water erosion, (2) provision of food and cover for variety of animal species, (3) improvement of the visual or aesthetic quality of the disturbed slopes. On Nov. in 1995, the 5cm thick layer of artificial soil and 2cm thick layer of straw-mulching was attached at rock-exposed cut-slopes by NTRM without using anchor wire and anchor pin. The main results during four years surveying on the ground-coverage effect, plant growth, species diversity and importance values were summarized as follows. 1. Artificial soil attached at rock exposed cut-slopes was not eroded until recovered by tree and herbaceous vegetation in spite of not using anchor wire and anchor pin. Also it shows low soil hardiness and has almost the same amount of bacteria and fungi with in surrounding natural topsoil. 2. In 'combination for the woody vegetation', Lespedeza cyrtobotrya, Albizzia julibrissin, Rhus chinensis, Indigofera pseudo-tinctoria occupied upper layer vegetation. Since three years after seeding, Indigofera pseudo-tinctoria had overwhelmed the other woody plants and cool season foreign grasses, Erigeron canadensis, Taraxacum mongolicum, Commelina communis, Arundinella hirta (Thunberg) and Oenothera erythrosepala grows at lower part of the vegetation, 3. The heights of the Rhus chinensis grows 1.8m, Indigofera pseudo-tinctoria 2.0m, so it seems that the objectives of woody vegetation with native plants could be accomplished. 4. After 4 years later after seeding in 'combination for the herbaceous vegetation', the most dominant plant was Indigofera pseudo-tinctoria, the next was in order of cool-season grasses, Taraxacum mongolicum, Erigeron canadensis, lxeris dentata (Thunberg), Oenothera erythrosepala, Arundinella hirta (Thunberg). The diversity index in 'combination for woody vegetation' was higher than that in 'combination for the herbaceous vegetation'. The tendency of the intrusion of secondary succession plants was more effective in 'combination for the herbaceous vegetation' than in 'combination for the woody vegetation'.

• ALGAE
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• 제27권4호
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• pp.249-258
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• 2012

Nongeniculate coralline red algae are a common element of the Brazilian coastal zone, especially associated to coral reefs. During the course of ecological studies at Parque Municipal Marinho do Recife de Fora, two species of non-geniculate Corallinales were the major organisms covering the reef. Analyses of the vegetative and reproductive features of the species were analyzed; indicating that one new species of the genus Lithothamnion is proposed here based on the combination of several features associated with anatomy of the tetrasporangial conceptacles in relation to other species of the genus for which modern accounts are available. This new proposal along with other new species, new combinations and range extension of some species of the genus based in similar features clearly suggest that stability in species delimitation is possible. The second species found Pneophyllum conicum represents a range extension of more than 6,000 km from the Pacific in to the Atlantic Ocean suggesting that some nongeniculate species are widely distributed. The occurrence and abundance of these species supports and emphasizes the need for an extensive taxonomic reassessment of coralline red algae in the context of Brazilian coral reef biodiversity.