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고경문 대한피부과학회 1974 大韓皮膚科學會誌 Vol.12 No.4
A 47 year old male seller with 4 year history of taking herb pill containig arsenic was examind on Feb. 13. 1974 because of generalized multiple pinhead to pea sized dark brownish pigmented macules and bean to little finger tip sized dull red crusted papules on right forearm and right knee joint and dull red crusted nodule on abdominal wall. The first symptom was arsenical melanosis on whole body. This pigmentation became discolored gradually. Biopsy specimens were obtained from nodule on abdominal wall and macule on forearm. The findings were charactristic of Bowen's disease. Diagnosis was confirmed by clinicaI appearance and typical histopathological features.
고경문,장진요 대한피부과학회 1973 大韓皮膚科學會誌 Vol.11 No.1
Two cases of inetastatic tumor of the skin were reported with literature review. One case, aged 67 years male, had a seven year history of multiple nolular lesions On the abdorninal wall. Histopathological findings were compatible with adenocarcinoma. Other case, aged 57 years male, who had a episode of subtotal gastrectomy, under dingnosis of stomach cancer four years ago, had a one and half year history of multiple nodular lesions on the face. Histopathological findings were compatible with fibrosis at first biopsy but confirmed with undifferential carcinoma after five months, These metastatic tumors of the skin were considered to be originated from the stomach in view of clinical and histopathological findings.
고경문,김인중,고청아,임용현,임영란,김태규,윤일선,황의진,이경석 대한화학회 2017 Bulletin of the Korean Chemical Society Vol.38 No.2
An arsenobetaine (AsB) standard solution with metrological traceability to the International System of Units was developed as a calibration standard for the quantitative analysis of AsB. An arsenic-specific mass balance method was established for the certification of the AsB standard solution. The accurate mass fraction of total arsenic in the solution was determined by instrumental neutron activation analysis with direct comparator method. Arsenic-containing impurities were evaluated by arsenic speciation analysis using liquid chromatography-inductively coupled plasma mass spectrometry (LC-ICP-MS). Two LC separation methods were adopted for comprehensive coverage of the impurities, which include the reversed-phase LC with ion-pairing and the cation exchange chromatography. The only arsenic-containing impurity observed by LC-ICP-MS was trace level of trimethylarsine oxide. The mass fraction of arsenic in the form of AsB was obtained by subtracting the arsenic mass fractions of the impurities from the total arsenic in the standard solution. The between-bottle inhomogeneity of AsB content in the standard solution was less than 0.7%, which was estimated from the relative standard deviation of the measurement results obtained from 10 representative sample bottles from a batch. The certified value of AsB and its expanded uncertainty as arsenic mass fraction were assigned to be (51.28 ± 1.17) mg/kg (k = 2 approximately at 95% level of confidence).