• Animal Systematics, Evolution and Diversity
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• 제33권4호
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• pp.246-255
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• 2017

Three freshwater ciliates, Lembadion lucens (Maskell, 1887) Kahl, 1931, L. bullinum ($M{\ddot{u}}ller$, 1786) Perty, 1849, and L. magnum (Stokes, 1887) Kahl, 1931, belonging to the genus Lembadion Perty, 1849 are newly reported from Korea with detailed descriptions and illustrations based on live observation and protargol impregnation. Lembadion lucens is characterized by following characteristics: $52-91{\times}33-64{\mu}m$ body size in vivo; ovoid and slightly asymmetric body shape; 27-49 somatic kineties; and 55-80% of whole pellicle covered with meridional lines with rectangular meshes in posterior portion. Lembadion bullinum is distinguishable from its congeners by its body size of $110-130{\times}60-73{\mu}m$ in vivo; ovoid body shape; oral aperture occupying about four-fifths of ventral side; 48-55 somatic ciliary rows; meridional lines with rectangular meshes except anterior portion (about 16% of body) on pellicle. Lembadion magnum is also characterized by its body size of $70-90{\times}37-50{\mu}m$ in vivo; obliquely asymmetric anterior end of body; oral aperture occupying about more than four-fifths of ventral surface, and opened longitudinally entire ventral surface; 45-61 somatic ciliary rows; meridional lines without rectangular meshes on whole pellicle of body. The present study is the first description of the genus Lembadion from Korea.

• 대한수의학회지
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• 제39권4호
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• pp.760-764
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• 1999

A totoal of 219 pigs, 109 necropsy-pigs at the diagnostic laboratory of Cheju National University and 110 slaughter-pigs in Cheju, were evaluated for the prevalence of tissue antigen and serum antibody for spontaneus porcine reproductive and respiratory syndrome(PRRS). Tissues from 219 pigs examined for PRRS viral antigen by immmunohistochemistry included lung(cranio-ventral lobes and dorso-caudal lobes), tonsil, tracheobronchial lymph node, mesenteric lymph node, heart, kidney, liver, spleen, testis, ovary, brain, and spinal cord. Sera from 180 pigs were tested for the presence of antibody to PRRS virus by the indirect fluorescent antibody assay (IFA). In the examination of serum antibody and tissue antigen for PRRS virus, serum antibody titers were considered as positive in 10%(18/180) of animals tested and PRRS viral antigen was detected in tissues of 4%(9/219) of the pigs. PRRS virus tissue antigen was most commonly detected by immunohistochemistry in the cranio-ventral lobe and tonsil. We also confirmed the distribution of tissue antigen and prevalence of serum antibody to PRRS virus in Cheju. The detection of viral antigen by immunohistochemistry in tonsils and cranio-ventral lobes proved to be a very useful method for PRRS diagnosis.

• Archives of Plastic Surgery
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• 제36권2호
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• pp.225-228
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• 2009

Purpose: Urethral reconstruction following failed hypospadias repair is difficult because of a severe shortage of the skin on ventral surface of the penis. We experienced a successful reconstruction of a failed hypospadias repair using the radial forearm free flap. So we present our case. Methods: A 16 - year - old boy had a proximal shaft hypospadias and had been taken a transverse preputial island flap but it completely broke down. There was no spare skin on the shaft of the penis. So we reconstructed a neo - urethra and the ventral skin of the penis with the radial forearm free flap. Results: Postoperatively he made relatively good process. The urethral catheter was maintained for 10 days and self - voiding was started. The suprapubic catheter was removed at the postoperative 30th day after control of cystitis. The postoperative appearance of the penis is acceptable and a straight erection is achieved. Conclusion: In the scarred penis with hypospadias, the radial forearm free flap transfer is a reliable reconstructive method for the neo - urethra and the ventral skin of the penis.

• 대한수의학회지
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• 제45권4호
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• pp.465-467
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• 2005

The sacrum fused with ilium in a chinese water deer (Hydropotes inermis) was observed. The sacrum consists of four sacral vertebrae which was fused each other. In the ventral part of the fused pelvis, on the left, there was a 20.19 mm gap at the dorsolateral part of the sacroiliac articular part which is in between the promontory and the cranial border of the first ventral sacral foramen. On the right, there was a 14.34 mm gap at the dorsal part of sacroiliac articulation. In the dorsal view of the fused pelvis, the wing of sacrum and the wing of ilium were fused tightly, so that the boundary of the two bones was not recognizable. The left and right second dorsal sacral foramina and the third dorsal sacral foramen on the left were small. The third dorsal and ventral sacral foramina on the right were not formed.

• Applied Microscopy
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• 제27권1호
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• pp.1-12
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• 1997

Dorsal and ventral epithelium of leech, Whitemenia edentula, were observed, using both light and electron-microscope. Results are as follows. Epithelia are composed of simple columnar or irregularly-shaped epithelium, the transveral folds were seen in the cross-sectioned dorsal and ventral epithelia, but only longitudinal folds(depth $500{\mu}m$, width $350{\mu}m$) were discovered in the ventral epithelium. As to muscular tissue under the dorsal epithelium of Whitemenia edentula, that of longitudinal muscle layer is thicker and more developed than that of circular muscle layer. Seven gland cells (type-A, B, C, D, E, F and H cells) and one pigment cell (type-G cell) were discovered in the whitemenia edentula. Those were identified as three kinds of the neutral mucopolysaccharide granoles (type-A, B and F cells), two kinds of acidic mucopolysaccharide granules (type-C and D cells), and two kinds of non-reactive granules respectively (type-E and F cells). The glanules of the type-A and type-B gland cells ae electronly high-dense, and surrounded by the muscular tissue. As to the distribution of gland cells, the type-A, type-B, type-C, type-D, type-I and type-H gland cells were discovered only between the connective tissue and the circular muscle layer, while type-F gland cells were discovered only between tile circular muscle layer and the longitudinal muscle layer.

• Journal of Species Research
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• 제9권1호
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• pp.19-25
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• 2020

Larvae, pupae, and adults reared from the pupae of Simulium (Boreosimulium) konoi were collected and recorded from Korea for the first time. I provide detailed descriptions of both immatures and adults accompanied with photographs. The subgenus Boreosimulium, previously unknown from Korea, contains 19 species in 3 species-groups worldwide and only 2 species, viz, S. (B.) konoi and S. (B.) tokachiense, are recorded from Japan. Simulium konoi is unique among the members of the subgenus by having water dropshaped denticles on the anterior portion of the cibarium in females, which is considered as an autapomorphic character so far not found in other black flies, W or inverted V-shaped ventral plate of male genitalia, and larval thorax and abdominal segments covered with short black setae. Korean specimens of S. konoi collected from two adjacent localities can readily be recognized by denticles on the cibarium in females and well-developed ventral plate of male genitalia but showed geographical variation, e.g., lacking ventral tubercle on larval abdominal segment IX. Due to the autapomorphy and other characters found in S. konoi, the current placement of the S. konoi in the subgenus Boreosimulium or species-group assignment is tentative.

• International Journal of Industrial Entomology and Biomaterials
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• 제3권2호
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• pp.177-185
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• 2001

This study has been carried out to determine localization of Manduca sexta allatotropin (Mas-AT) neuropeptide in developing ventral nerve cord of the silk moth Bombyx mori with polyclonal antisera against Mas-AT. Suboesophageal ganglion (SOG) of the second to fifth instar larvae and 3-day-old pupae showed two to ten Mas-AT-immunoreactive (Mas-AT-IR) cell bodies. There were two to three pairs of labeled cell bodies in each thoracic ganglion (TG) from third instar larvae to adults, with the exception of TG from prepupae. One pair of labeled cell bodies was localized in each abdominal ganglion (AG) 1 to 6 from third instar larvae to 3-day-old pupae, whereas in 5-day-old pupae to adults there was one pair in a similar location of AG 1 to 5. The seventh neuromeres of terminal abdominal ganglia (TAG) from third instar Iarvae to 3- day-old pupae contained four labeled large cell bodies. In each of AG 1 to 7, these cell bodies showed similar allatotropin-immunoreactivity in appearance. Some labeled axons, projected from Mas-AT-lR cells in each of those AG, were extended to the nerves N 1 and N 2.

• 수산해양기술연구
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• 제57권3호
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• pp.205-213
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• 2021

Two specimens of Hemitrygon izuensis (395.8-471.5 mm in disc width), belonging to the family Dasyatidae (Myliobatiformes), were collected from the waters off north-eastern Jeju-do Island in June 2016 and Pohang in August 2019. This species was characterized by having no spots on dorsal side of disc, white ventral tail fold and short preorbital snout length (15.6-18.3% of disc width). This species is similar to H. akajei and H. sinensis reported in Korea, but differs in small denticles on mid-line of dorsal surface of disc (absent in H. izuensis vs. present in H. akajei and H. sinensis), the length of ventral tail fold (28.1-31.0% in H. izuensis vs. 48.0-48.6% in H. akajei vs. 45.0% in H. sinensis), color of ventral tail fold (white in H. izuensis vs. black in H. akajei and H. sinensis) and small tubercles on the posterior part of tail (absent in H. izuensis vs. present in H. akajei and H. sinensis). We suggest a Korean name for H. izuensis as "I-ju-gal-saeg-ga-o-li" following Kim et al. (2019).

• 대한치매학회지
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• 제23권2호
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• pp.89-94
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• 2024

Background and Purpose: This study aimed to evaluate the brain magnetic resonance imaging (MRI) of patients with acute transient global amnesia (TGA) using volumetric analysis to verify whether the brains of TGA patients have pre-existing structural abnormalities. Methods: We evaluated the brain MRI data from 87 TGA patients and 20 age- and sex- matched control subjects. We included brain MRIs obtained from TGA patients within 72 hours of symptom onset to verify the pre-existence of structural change. For voxel-based morphometric analyses, statistical parametric mapping was employed to analyze the structural differences between patients with TGA and control subjects. Results: TGA patients exhibited significant volume reductions in the bilateral ventral anterior cingulate cortices (corrected p<0.05). Conclusions: TGA patients might have pre-existing structural changes in bilateral ventral anterior cingulate cortices prior to TGA attacks.

• Parasites, Hosts and Diseases
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• 제27권1호
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• pp.57-66
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• 1989

이락촌폐흡충(Paragonimus iloktsuenensis)의 성장 발육에 따른 표피 미세구조의 변화를 주사전자현미경으로 관찰하였다. 충체는 말똥게(Sesarma dehaani)에서 분리한 피낭유충과 흰쥐 감염 후 5∼4주에 얻은 유약충 및 감염 8주에 얻은 성충을 대상으로 하였다. 탈낭한 피낭유충은 작은 표주박 모양으로 전신이 상모양의 피극(tegumental spine)으로 덮혀 있었다. 대형의 제 II형 감각 유두(large, non-ciliated round swelling)가 구흡반 주위에 11∼12개, 복흡반 주위에 6∼8개 배열되어 있었다. 감염 2주의 유약충은 홀쭉하고 긴 모양이었고 피극이 피낭유충 보다 덜 밀생하고 있었으며 피극 끝이 2개로 갈라진 것도 관찰되었다. 많은 제 I형 감각 유두 (ciliated knob-like papillae)가 구흡반 주위에 분포하며 대형의 제 II형 감각 유두가 복흡반 주위에서 관찰되었다. 감염 4주의 유약충은 몸체가 두꺼워졌고 표피에는 3∼5개씩 군집된 피극들이 관찰되었다. 구흡반 및 복홉반 주위에는 제 I형 감각 유두와 소형의 제 II형 감각 유두가 분포하고 있었다. 감염 8주 된 성충은 매우 두꺼운 몸체를 보였고 곰의 발톱처럼 생긴(bearfoot-like) 피극이 전신의 표피에 밀생하고 있었다. 특히 배측에는 자갈 모양의 세포 돌기(cobblestone-like cytoplasmic process) 들이 잘 발달되어 있었고 많은 피극들이 여기에 매몰되어 있는 것이 관찰되었다. 이 연구에서는 이락촌폐흡충이 피낭유충에서 유약충 및 성충으로 성장함에 따라 그 표피의 형태 및 구조도 점차적으로 바뀌며 계속 분화되어 간다는 것을 확인할 수 있었다.