1.11 Cases of Aspergillosis.
Ho Won HWANG ; Jang Shin SOHN ; Chae Hong SUH
Korean Journal of Pathology 1985;19(3):325-331
Genus of aspergilli are ubiquitous saprophytic molds in nature, which are recognized about 700 species, at least eight are pathologic for human. Pulmonary aspergillosis is rare disease, most frequent presenting as secondary invasion, and aspergillosis of the nasal cavity is the most common sites of the extrapulmonary aspergillosis. Predisposing factors for pulmonary aspergillosis are chronic lung disease, tuberculosis, antibiotics, cytotoxins and neoplasia, hematologic disorders, and histoplasmosis etc. Authors have experienced 10 cases of pulmonary aspergillosis and a case of aspergillosis of nasal cavity in Dept. of Pathol. Chosun univ. hospital and christian hospital from Feb. 1981 to July 1984. Patient of pulmonary aspergillosis are received surgical resection and survived well without complications.
Humans
;
Cytotoxins
2.Development of an analytical method for the determination of dl-methylephedrine hydrochloride in porcine muscle using liquid chromatography-tandem mass spectrometry
Won-Seok CHAE ; Suk KIM ; Hu-Jang LEE
Korean Journal of Veterinary Research 2020;60(4):209-213
This study examined the residue of dl-methylephedrine hydrochloride (MEP) on the muscle of pigs administered orally with MEP 12 g/ton feed for seven consecutive days. Twenty healthy cross swine were administered MEP. Four treated animals were selected arbitrarily to be sacrificed at 1, 2, 3, 4, and 5 days after treatment. MEP residue concentrations in the muscle were determined by liquid chromatography coupled with tandem mass spectrometry. The drug was extracted from muscle samples using 10 mM ammonium formate in acetonitrile followed by clean-up with n-hexane. The analyte was separated on an XBridgeTM hydrophilic interaction liquid chromatography column using 10 mM ammonium formate in deionized distilled water and acetonitrile. The correlation coefficient (R2 ) of the calibration curve was 0.9974, and the limits of detection and quantification were 0.05 and 0.15 μg/ kg, respectively. The recoveries at three spiking levels were 94.5–101.2%, and the relative Standard Deviations was less than 4.06%.In the MEP-treated group, MEP residues on one day post-treatment were below the maximum residue limit in the muscle. The developed method is sensitive and reliable for the detection of MEP in porcine muscle tissues. Furthermore, it exhibits low quantification limits for animal-derived food products destined for human consumption.
3.Development of an analytical method for the determination of dl-methylephedrine hydrochloride in porcine muscle using liquid chromatography-tandem mass spectrometry
Won-Seok CHAE ; Suk KIM ; Hu-Jang LEE
Korean Journal of Veterinary Research 2020;60(4):209-213
This study examined the residue of dl-methylephedrine hydrochloride (MEP) on the muscle of pigs administered orally with MEP 12 g/ton feed for seven consecutive days. Twenty healthy cross swine were administered MEP. Four treated animals were selected arbitrarily to be sacrificed at 1, 2, 3, 4, and 5 days after treatment. MEP residue concentrations in the muscle were determined by liquid chromatography coupled with tandem mass spectrometry. The drug was extracted from muscle samples using 10 mM ammonium formate in acetonitrile followed by clean-up with n-hexane. The analyte was separated on an XBridgeTM hydrophilic interaction liquid chromatography column using 10 mM ammonium formate in deionized distilled water and acetonitrile. The correlation coefficient (R2 ) of the calibration curve was 0.9974, and the limits of detection and quantification were 0.05 and 0.15 μg/ kg, respectively. The recoveries at three spiking levels were 94.5–101.2%, and the relative Standard Deviations was less than 4.06%.In the MEP-treated group, MEP residues on one day post-treatment were below the maximum residue limit in the muscle. The developed method is sensitive and reliable for the detection of MEP in porcine muscle tissues. Furthermore, it exhibits low quantification limits for animal-derived food products destined for human consumption.
4.Two Cases of Nodular Cystic Fat Necrosis Possibly Related to Previous Trauma.
Seok Jong LEE ; Won Chae LEE ; Yun Hwan JANG ; Do Won KIM ; Sang Lip CHUNG ; Han Ik BAE
Annals of Dermatology 2004;16(1):19-22
Nodular cystic fat necrosis, first described by Przyjemski and Schuster, is a peculiar form of encapsulated necrosis of subcutaneous fat characterized by totally or near-totally encapsulated necrosis of fatty tissue in which clusters of nonviable adipocytes are surrounded by condensed fibrous tissue. We report two cases of nodular cystic fat necrosis associated with history of trauma about the site of the lesion. Each lesion was a subcutaneous movable nodule on buttock (case 1) and shin (case 2) which has evolved over months. Both cases showed possible relation to multiple intramuscular injection or direct trauma injury. Pathologically, encapsulated nodule showed a characteristic feature of nodular cystic fat necrosis which composed of the ghosts of anucleated adipocytes showing fairly well-preserved outline.
Adipocytes
;
Adipose Tissue
;
Buttocks
;
Fat Necrosis*
;
Injections, Intramuscular
;
Necrosis
;
Subcutaneous Fat
5.Six Cases of Segmental Neurofibromatosis.
Kyou Chae LEE ; Dong Hyuk EUN ; Yong Hyun JANG ; Seok Jong LEE ; Do Won KIM ; Weon Ju LEE
Korean Journal of Dermatology 2016;54(8):660-661
No abstract available.
Neurofibromatoses*
6.Phacomatosis Pigmentokeratotica.
Soo Yuhl CHAE ; Hyun Bo SIM ; Yong Hyun JANG ; Weon Ju LEE ; Do Won KIM ; Seok Jong LEE
Korean Journal of Dermatology 2016;54(6):489-490
No abstract available.
Neurocutaneous Syndromes*
7.Phacomatosis Pigmentokeratotica.
Soo Yuhl CHAE ; Hyun Bo SIM ; Yong Hyun JANG ; Weon Ju LEE ; Do Won KIM ; Seok Jong LEE
Korean Journal of Dermatology 2016;54(6):489-490
No abstract available.
Neurocutaneous Syndromes*
8.Accessary Nipple-like Ectopic Salivary Gland in the Anterior Neck.
Hyun Bo SIM ; Soo Yuhl CHAE ; Yong Hyun JANG ; Seok Jong LEE ; Do Won KIM ; Weon Ju LEE
Korean Journal of Dermatology 2015;53(10):807-809
No abstract available.
Fistula
;
Neck*
;
Salivary Glands*
9.Comparison of Auto-PEEP Levels Measured by End-expiratory Port Occlusion Method and Trapped Lung Volume.
Jang Won SOHN ; Chae Man LIM ; Younsuck KOH
The Korean Journal of Critical Care Medicine 2005;20(2):131-135
BACKGROUND: There are several METHODS: for auto-PEEP measurement during mechanical ventilation. The end-expiratory port occlusion (EEPO) method is simple and easy. Theoretically, auto- PEEP level can be also calculated by using trapped lung volume and static compliance. However, the relationship between measured auto-PEEP by EEPO method and the calculated auto-PEEP has not been studied. The purpose of this study is to observe the relationship between the measured and the calculated auto-PEEP. METHODS: 15 patients with auto-PEEP during mechanical ventilation were included. Auto-PEEP was measured by EEPO method, and calculated by using a formula; trapped lung volume/static compliance. All of the patients were paralyzed during the study. If the measured auto-PEEP is higher than calculated auto-PEEP, this patient was included in `high group'; in the opposite case, `low group'. We compared respiratory mechanics between these two groups. RESULTS: Measured auto-PEEP was 9.60+/-2.82 cmH2O, and calculated auto-PEEP was 9.78+/-2.90 cmH2O. There was statistically significant relationship between measured and calculated auto-PEEP (r=0.81, p<0.01). There was no difference on respiratory mechanics between `high group' and `low group'. CONCLUSIONS: The auto-PEEP obtained by calculation with trapped lung volume and static compliance showed a good correlation with that of using EEPO method in the paralyzed patients.
Compliance
;
Humans
;
Lung*
;
Positive-Pressure Respiration, Intrinsic*
;
Respiration, Artificial
;
Respiratory Mechanics
10.Conditions for the disinfectant efficacy test under subzero temperatures
Won Seok CHAE ; Wooseog JEONG ; Hu Jang LEE
Korean Journal of Veterinary Research 2019;59(1):43-45
To establish appropriate conditions for a disinfectant efficacy test at subzero temperatures, this study examined mixtures of frozen foot-and-mouth disease virus or avian influenza virus solutions and disinfectant diluents at −5℃ and monitored temperature and freezing status of an anti-freezing diluent (AFD, 15% ethanol + 30% propylene glycol + 55% distilled water) over time at various subzero temperatures. Viral solutions and disinfectant diluents froze before the mixtures reached −5℃, whereas the AFD was not frozen at −30℃. The times taken for the AFD to reach −10, −20, −30, and −40℃ from room temperature were 36, 39, 45, and 48 min, respectively.
Animals
;
Ethanol
;
Foot-and-Mouth Disease Virus
;
Freezing
;
Influenza in Birds
;
Propylene Glycol