• 한국수산과학회지
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• 제46권5호
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• pp.589-593
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• 2013

Scolecenchelys borealis was first added to the Korean fish fauna based on one leptocephalus specimen (total length (TL) 59.2 mm) collected from Dokdo, in the East Sea. Recently, however, Scolecenchelys borealis has been treated as a junior synonym of Scolecenchelys aoki, necessitating review of the scientific name S. borealis. This study describes the morphological characteristics of S. aoki based on an adult specimen (TL 230.0 mm) collected from the sea south of Korea and compares its mitochondrial DNA 12S rRNA sequence with that of the S. borealis leptocephalus. The adult S. aoki is characterized by several morphological features: vertebral formula 59-55-135; preanal lateral pores 55; infraorbital pores two; teeth on upper jaw visible externally when the mouth is closed; the dorsal fin originates just behind the anus; both jaws and vomerine teeth are conical, arranged in two rows. An analysis of an 886-base paire sequence of the 12S rRNA showed that adult S. aoki was concordant with the S. borealis leptocephalus (sensu Ji et al., 2012), indicating that both are the same species.

• 대한두경부종양학회지
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• 제14권1호
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• pp.76-80
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• 1998

Generally, the papillary carcinoma generally has a favorable prognosis, and several variants of pathologic heterogeneity are recognized. Variants that are regarded as more aggressive are tall cell, columnar cell, and diffuse sclerosing types. Seventeen cases of papillary thyroid carcinoma showing clinically aggressive behavior, invading extrathyroidal structures, were retrospectively reviewed to evaluate the morphological variants of the tumors. Six of them were found to be pure papillary and nine were mixed types regarded as non-aggressive variants. Four cases were found to be tall cell variants, two cases of non-extrathryoidal invasion and two of extrathyroidal invasion regarded as aggressive variants. Our findings suggest that the prognosis of papillary carcinoma not always be based on its morphological variant and more attention should be given to other clinical parameters.

• Animal Systematics, Evolution and Diversity
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• 제11권3호
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• pp.329-334
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• 1995

1992년부터 1994년까지 우리나라의 연안에서 채집된 참서대과 어류 6종의 상두개골계(epicranical bony system) 에 대해 비교 검토하였다. 상두개골 가운데 erisma 와 frontal element 의 발달정도에 따라 1. Paraplagusia japonica, 2.Cynogossus joyneri 와 C.robustus, 3.c. semilaveis와 C. abbreviatus, 4.C. interruptus 의 4 group 으로 구분되엇고, erisma를 지지하는 proximal radials 의 수에서도 P.japonica와 C. robustus 가 10-11개, C. joyneri 10-12 . C. semilaevis 9-11. C. abbreviatus 9-10 , C. interruptus 7-8개로 종간에 많은 차이를 나타냈다. 이러한 골격의 형태적 차이는 종간의 유연관계를 나타내는데 중요한 형질로 사료된다.

• Journal of the Korean Wood Science and Technology
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• 제33권5호통권133호
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• pp.92-98
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• 2005

This study was performed to get the basic information concerned to the optimum culture condition of Inonotus obliquus. Several solid media, PDA, MEA and Czapek-Dox, and three liquid media were adopted for the in vitro cultivation. Some main features of the fungal morphological characteristics under cultivation conditions were observed and described. Preliminary results showed that appearance of the mycelial mat, hyphal size and substrate pigmentation differed according to the media. The PDA medium was the most favorable substrate for the growth on solid culture, followed by MEA and Czapek-Dox media. Concerned to the addition of amino acids, 5 amino acids, such as alanine, alginine, isoleucine, leucine and threonine, enhanced to the mycelial growth. Isoleucine was shown the best fungal growth. An important morphological hyphal structure for the fungus, the setae, was found in abundance and diverse its shape and size. In liquid culture, fresh potato broth was the best growth stimulant of the fungus, followed by Malt extract and potato broth. Addition of yeast extract to the liquid media had improved the biomass, but not laccase production.

• Journal of Computing Science and Engineering
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• 제8권2호
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• pp.119-128
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• 2014

The appearance of retinal blood vessels is an important diagnostic indicator of serious disease, such as hypertension, diabetes, cardiovascular disease, and stroke. Automatic segmentation of the retinal vasculature is a primary step towards automatic assessment of the retinal blood vessel features. This paper presents an automated method for the enhancement and segmentation of blood vessels in fundus images. To decrease the influence of the optic disk, and emphasize the vessels for each retinal image, a multidirectional morphological top-hat transform with rotating structuring elements is first applied to the background homogenized retinal image. Then, an improved multiscale line detector is presented to produce a vessel response image, and yield the retinal blood vessel tree for each retinal image. Since different line detectors at varying scales have different line responses in the multiscale detector, the line detectors with longer length produce more vessel responses than the ones with shorter length; the improved multiscale detector combines all the responses at different scales by setting different weights for each scale. The methodology is evaluated on two publicly available databases, DRIVE and STARE. Experimental results demonstrate an excellent performance that approximates the average accuracy of a human observer. Moreover, the method is simple, fast, and robust to noise, so it is suitable for being integrated into a computer-assisted diagnostic system for ophthalmic disorders.

• Journal of Species Research
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• 제7권1호
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• pp.1-8
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• 2018

Macrofungi are visible to the naked eye and play important ecological roles in nutrient cycles as decomposers and symbionts in forest ecosystems. Collectively, macrofungi have great potential as valuable resources for food, cosmetics, and medicinal uses. We surveyed the Royal Tombs (Donggureung and Seooreung) of the Joseon Dynasty and Jongmyo Shrine, where the surrounding vegetation is well-preserved, to investigate indigenous macrofungi. During surveys in 2015-2016, we discovered six macrofungi that were previously not recorded to Korea. They were identified to the species level using morphological features and phylogenetic analysis based on the internal transcribed spacer region: Cruentomycena kedrovaya, Dacrymyces aureosporus, Laetiporus versisporus, Parasola setulosa, Piptoporellus soloniensis, and Pluteus longistriatus. The detailed morphological descriptions and molecular analysis are provided in this study.

• Parasites, Hosts and Diseases
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• 제48권3호
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• pp.253-257
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• 2010

Two adult rock partridges raised in a city zoo were examined parasitologically and pathologically. Two distinctive eggs resembling those of Capillaria and Heterakis were detected in the feces. At necropsy, a markedly-dilated duodenum with severe catarrhal exudates, containing adult worms of Capillaria sp. and Heterakis sp. in the cecum, was observed. Male Capillaria had the cloacal aperture extended almost terminally with a small bursal lobe and an unsheathed spicule with transverse folds without spines. Female Capillaria had a vulva that was slightly prominent and slightly posterior to the union of the esophagus and intestine. The esophagus of the adult Capillaria was more than a half as long as the body in the male, but was much shorter in the female. Based on these morphological features, the capillarid nematode was identified as Capillaria obsignata. The male adult worms of Heterakis was identifiable by 2 dissimilar spicules, a unique morphological feature where the right spicule was considerably longer than the left, which is also a characteristic feature of Heterakis gallinarum. This is the first report of concurrent infections with C. obsignata and H. gallinarium in rock partridges.

• The Plant Pathology Journal
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• 제27권2호
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• pp.120-127
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• 2011

While many isolates of Alternaria alternata are common saprophytes on trees and shrubs, this study clearly demonstrated that A. alternata is a primary pathogen in lilac (Syringa sp.), causing a leaf-blight that affects different Syringa species. Isolates of Alternaria sp. were collected from leaf blight samples of lilacs in the field. The internal transcribed spacer (ITS) region and morphological characterization were used to identify lilac blight pathogen. Based on 100% ITS nucleotide sequence identities to the Alternaria genus in the GenBank and morphological features, these isolates were identified as A. alternata. Disease symptoms were reproduced in lilac plants inoculated with A. alternata mycelial plugs and sprayed with a fungus-free culture filtrate, indicating that pathogenesis in lilac involves secondary metabolites or toxins. Diagnostic primers were developed to detect Alternaria sp. and A. alternata in lilac leaf blight based on ITS region and four known genes associated with pathogenesis in A. alternata: mixed-linked glucanase precursor, endopolygalacturonase, hsp70, and histone genes. The results from our study indicated A. alternata is a primary pathogen in lilac leaf blight, and these diagnostic primers can be used as a tool for the fast detection of A. alternata associated with lilac leaf blight.

• 한국가구학회지
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• 제25권3호
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• pp.188-197
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• 2014

This study aimed to develop organic design and propose references on an origin and developing factors of the organic design as looking into previous researches on furniture design. Expressive features with curves observed in the furniture design have been interpreted as organic meanings, and the study also approached grounds for the organic design elements while talking about developments of new materials and digital technology. In addition, the study presented a possibility explaining that these organic design elements might have been derived and developed from Art Nouveau. State-of-the art technology of the digital era in the 21st century has been built upon more creative concepts, and as this technology gets combined with the digital technology, it is, now, changing but also improving both morphological aspects and design methodologies. In the midst of this change, when it comes to factors to develop the organic design, creation of various new materials and state-of-the art digital technology are considered to be immediate factors to changes in the design. As morphological thinking using digital media develops, geometric thinking and such form are realized which eventually would lead us to furniture design of a new concept.

• Bulletin of the Korean Chemical Society
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• 제23권6호
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• pp.884-890
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• 2002

An inorganic-organic hybrid system, silica-poly(ethylene glycol) songel is reported. This system was prepared via sol-gel method by varying varous processing variables. e.g. ultrasonic radiation time, gelling temperanture, PEG content and its molecular weight. Various experimental techniques wee employed to analyze the morphological, mechanical and optical properties of the system. The results were discussed in the light of existing theories. The sonogel system exhibited the common features of inorganic-organic hybrids. $SiO_2-10$ wt% PEG sonogel exhibited the morphological and optical properties superior to those reported earlier for the classic gels and found suitable for device applications.