• Parasites, Hosts and Diseases
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• v.58 no.1
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• pp.81-86
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• 2020

Trematode specimens were collected from the intestine of a herring gull, Larus argentatus, which was found in a critical condition on the shore of a small island (Yubu-do, Seocheon-gun, Chungcheongnam-do) located at the western coast of the Korean peninsula. Total 11 specimens of intestinal flukes, including 3 Cryptocotyle lingua (Heterophyidae), 1 Himasthla alincia (Echinostomatidae), 5 Cardiocephaloides medioconiger (Strigeidae), and 2 Diplostomum spathaceum (Diplostomidae), were recovered. C. lingua was morphologically characterized by the presence of a large ventrogenital apparatus and 2 obliquely tandem testes. H. alincia had an elongated body and a head collar equipped with 31 collar spines. C. medioconiger had a bisegmented body and a voluminous copulatory bursa containing the seminal vesicle and ejaculatory duct. D. spathaceum also had a bisegmented body and its vitellaria extended up to the anterior border of the tribocytic organ. It is of note that C. lingua is potentially zoonotic that can occur in birds and humans. Three of them, i.e., C. lingua, C. medioconiger, and D. spathaceum, are new trematode fauna in Korea. Studies on trematode fauna of migratory birds should be continued in Korea.

• KOREAN JOURNAL OF PACKAGING SCIENCE & TECHNOLOGY
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• v.8 no.1
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• pp.11-14
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• 2002

Packaging and distribution status of watermelon Korean markets; Chunanm and Chunbuk, Kyungnam and Kyungbuk from January, 1999 to December, 1999 was surveyed to shipping methods, quality. Distribution and marketing of watermelon was different to the producing area, and quality of it was four grade. In a grade, difference of weight was 86%, and that of soluble solid content was 130%. Packaging status was almost non-pack, in case of packaging, packaging material was corrugated fiberboard and wooden-collar box, and packaging unit was mainly used to 8 to 10kg box, for one head or 4 heads was a few.

• Journal of the Korean Society of Clothing and Textiles
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• v.21 no.3
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• pp.621-631
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• 1997

This study aims to analyze Sungkyunkwan Students' uniform during Chosen dynasty through literature and paintings. Confucian scholar's coshime of Chosen dynasty was said to imitate that of Chinese counterpart's. The first Confucian scholars costume, which was officially instituded during King Taeiong's reign, was a Yugon worn on the head and a Chongkeum (blue collar). But Chinese Gukjagam students'uniform in the early Ming years was a Nansam and later became a blue Wonryong which reflected the changes in the Ming Period. Though Chosun's Chongkeum was the official Confucian scholar's costume on record, it was not worn widely. Corfucian scholars rather wore a red Jikryong or a white coat up to the mid-Chosun dynasty, and in the late Chosen period, a black Danryong or a red Danryong were more popular for Confucian scholars. Because the official Confucian scholar's uniform Chongkeum was not used widely and other costumes were worn more popularly, various attempts had been made to adopt the Nansam, like that of Ming's, as the official Costume scholar's uniform from King Snio to King Youngio. Finally, King Youngjo decided to adopt the Nansam as the official costume for those who passed the civil service examination, ending the controversies concerning an official costume. We cannot find the Nansam and the Aengsam of the late Chosen period from the paintings either. This conirms that Aengsam was the costume which originated from the late Chosun period. The term "Chongkeum" was used either to imply "Confucian scholar' or to indicate various 'Confucian scholar's costume rather than its original meaning of blue collar.

• Journal of the Korean Society of Clothing and Textiles
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• v.40 no.6
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• pp.1116-1133
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• 2016

This study examines the historical background of Goryeo and its relationship with Song and Yuan. In addition, it observes the shape of dress styles for the king, queen, officers, maids in waiting, and commoners after classifying them with a focus on the dress style of normal people appearing in Buddhist paintings. This study then investigates structures by tracing Goryeo's unique identity and its characteristic by a comparison and analysis of dressing style elements of Goryeo with Song and Yuan. The results shows that the Song's system was used exclusively for the dress style of the king and government officers of Goryeo after Goryeo's submission period by Yuan. There were no clear appearances of a Mongol style dress but only changes in head styles of cutting hair around the head and twisting the rest in a top down and long method. In addition, Song's style Bokgeon was shown by the king to his lower level officers. This was because the king and his officers of Yuan were in accordance with Song's system in officer's dress, hat and head style, armor, and horseback riding equipment. Second, there is doubt if they inherited a traditional form and style of the dress rather than followed the dress style of Yuan because the shape of Yuan's basic dress style Deel is very similar to the dress shape of early Buyeo people's Po in the $3^{rd}$ to $4^{th}$ centuries. Third, the shape of the Chaksu and Gung-go had been kept as it was in the dress style of ordinary men, and because the shape of the double collar had already appeared in the period of Samguk, which appeared in all classes of Yuan. There is no reason to adopt double collar shape that appeared. The general Pyeonbokpo of the country had to be influenced by Yuan. Forth, the dress style of queen and her maids in waiting were mentioned in documents; however, there was no shape of a dress like Boktag and Deel in the relics, which are the characteristic of Yuan's woman dress style. Fifth, the shape worn national style Yu and Sang had been kept in an ordinary woman's dress style; however, the two style system of high and lower class in Yuan's ordinary woman dress style appeared newly and is considered an influence of Goryeo.

• Journal of Chest Surgery
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• v.25 no.6
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• pp.588-592
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• 1992

Recently we have experienced one case of long tracheal stenosis which developed after pulmonary tuberculosis. The patient was 32 years old woman, 165cm in height. She complained severe dyspnea and headache. We could hear the inspiratory wheezing sound and stridor without stethoscope. Preoperative tracheogram and chest CT scan showed long tracheal stenosis from the posterior portion of clavicular head to the upper portion of carina and right main bronchus. Under the general anesthesia, the stenotic segment, about 7.5cm, was resected and end to and anastomosis was performed successfully through the right anterolateral thoracotomy and supraclavicular collar incision. Her postoperative course was uneventful and the patient has remained well till now.

• Parasites, Hosts and Diseases
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• v.24 no.1
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• pp.77-81
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• 1986

Two cases of human Echinostcma hortense infection were found in Seoul Paik Hospital. Their stools revealed echinostomatid eggs. After treatment with prasiquantel (single does of 10∼12mg/kg) and purgation with magnesium salt, total 21 flukes were collected in one case. The flukes were 5.9∼7.5mm long, had 27∼28 collar spines around their head, laterally deviated ovary and two tandem testes. They were identified as 5. hortense Asada, 1926. The cases are 38-year and 20-year old men residing in Seoul, whose hometown is Chungsonggun and Seungju-gun, Kyongsangbuk-do respectively. They had eaten raw mesh of various kinds of fresh water fishes (both cases) and/or salamander (latter case) , which are considered possible sources of this fluke infection. They experienced abdominal discomfort and/or diarrhea. Hematology revealed 22% eosinophilia in the latter case, but it became 5% after the treatment. Echinostomatid eggs were not found after the treatment in both cases. These are the 4th and 5th human cases of 5. hortense infection in Korea.

• Parasites, Hosts and Diseases
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• v.40 no.2
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• pp.67-73
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• 2002

The present study was performed to observe tegumental ultrastructure of Echinoparyphium recurvatum according to developmental stages. Worms (1, 3, 5 and 15-day old) were recovered from chicks experimentally infected with metacercariae from radix auricularia coreana. One-day old worms were elongated and ventrally concave, and covered with peg-like tegumental spines except the adjacent areas of the head crown and excretory pore. Type I sensory papillae were distributed on the lip of the oral sucker, and grouped ciliated papillae were around the oral sucker. Peg-like tegumental spines were densely distributed on the anterior surface of the ventral sucker level. The ventral sucker had an aspinous tegument and no sensory papillae. Tegumental spines on the posterior surface of the ventral sucker level were sparsely distributed and disappeared posteriorly. In 3 and 5-day old worms, the tegument around the oral sucker was aspinose and wrinkled concentrically. The ventral sucker had a wrinkled tegument and many bulbous papillae. Type I sensory papillae were distributed between the bulbous papillae. Tegumental spines were spade-shaped with a terminal tip. A total of 45 collar spines including 4 end group ones on both ventral corners was alternately arranged in 2 rows. The 15-day old worms were very stout and their tegumental spines were tongue-shaped without a terminal tip, From the above results, it is confirmed that the surface ultrastructure of E. recurvatum was generally similar to that of other echinostomatid flukes. However, some features, i.e., morphological change of tegumental spines and appearence of sensory papillae on the ventral sucker according to development, and number, shape and arrangement of collar spines, were characteristic, which may be of taxonomic and bioecological significance.

• Safety and Health at Work
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• v.2 no.4
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• pp.348-354
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• 2011

Objectives: This cross-sectional study was performed in the Dental School of Prince of Songkla University to ascertain noise exposure of dentists, dental assistants, and laboratory technicians. A noise spectral analysis was taken to illustrate the spectra of dental devices. Methods: A noise evaluation was performed to measure the noise level at dental clinics and one dental laboratory from May to December 2010. Noise spectral data of dental devices were taken during dental practices at the dental services clinic and at the dental laboratory. A noise dosimeter was set following the Occupational Safety and Health Administration criteria and then attached to the subjects' collar to record personal noise dose exposure during working periods. Results: The peaks of the noise spectrum of dental instruments were at 1,000, 4,000, and 8,000 Hz which depended on the type of instrument. The differences in working areas and job positions had an influence on the level of noise exposure (p < 0.01). Noise measurement in the personal hearing zone found that the laboratory technicians were exposed to the highest impulsive noise levels (137.1 dBC). The dentists and dental assistants who worked at a pedodontic clinic had the highest percent noise dose (4.60 ${\pm}$ 3.59%). In the working areas, the 8-hour time-weighted average of noise levels ranged between 49.7-58.1 dBA while the noisiest working area was the dental laboratory. Conclusion: Dental personnel are exposed to noise intensities lower than occupational exposure limits. Therefore, these dental personnel may not experience a noise-induced hearing loss.

• Parasites, Hosts and Diseases
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• v.59 no.1
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• pp.35-45
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• 2021

Adult echinostomes having 37 collar spines collected from the intestine of Pitalah ducks in Aceh Province, Indonesia in 2018 were morphologically and molecularly determined to be Echinostoma miyagawai Ishii, 1932 (Digenea: Echinostomatidae). Among 20 ducks examined, 7 (35.0%) were found to be infected with this echinostome, and the number of flukes collected was 48 in total with average 6.9 (1-17) worms per duck. The adult flukes were 7.2 (6.1-8.5) mm in length and 1.2 (1.0-1.4) mm in width (pre-ovarian or testicular level) and characterized by having a head collar armed with 37 collar spines (dorsal spines arranged in 2 alternating rows), including 5 end group spines, and variable morphology of the testes, irregularly or deeply lobed (3-5 lobes) at times with horizontal extension. The eggs within the worm uterus were 93 (79-105) ㎛ long and 62 (56-70) ㎛ wide. These morphological features were consistent with both E. miyagawai and Echinostoma robustum, for which synonymy to each other has been raised. Sequencing of 2 mitochondrial genes, cox1 and nad1, revealed high homology with E. miyagawai (98.6-100% for cox1 and 99.0-99.8% for nad1) and also with E. robustum (99.3-99.8% for nad1) deposited in GenBank. We accepted the synonymy between the 2 species and diagnosed our flukes as E. miyagawai (syn. E. robustum) with redescription of its morphology. Further studies are required to determine the biological characteristics of E. miyagawai in Aceh Province, Indonesia, including the intermediate host and larval stage information.

• Applied Microscopy
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• v.33 no.3
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• pp.243-250
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• 2003

Ultrastructural changes of the male germ cells and structure of spermatozoa in Paralichthys olivaceus were examined by means of the light and transmission electron microscopes. The spermatogonium has a large nucleus with a single nucleus with a single nucleolus in the interphase. Primary spermatocytes are identified by the formation of the synaptonemal complex in the karyoplasm. The secondary spermatocytes are more concentrated and contains numerous cell organelle in the cytoplasm. The nucleus of spermatid in spermiogenesis is more condensed in the karyoplasm, and show spherical structure in shape. Mitochondria of the spermatids are observed in the lower portion of the nucleus. The spermatozoon consists of the head, mid piece and tail. The acrosome is not observed in the head. Axial filaments of the flagellum consists of nine pairs of the peripheral microtubules and one pair of the central microtubules.