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조광열(Gwang Yeol Joh),윤재일(Jai Il Youn),이유신(Yoo Shin Lee) 대한피부과학회 1986 대한피부과학회지 Vol.24 No.1
We report two familial cases of reticulate acropigmentation of kitamura in 20-year-old male and 29-year-old female patients in which reticualte, brownish, slightly depressed pigmentation developed on acral parts of extremities and subsequently extended proximally. Characteristic pits and breaks on palms and soles were noted. Histologic findings revealed epidermal atrophy and enlongation of rete ridges with large amounts of melanin. Electron microscopic findings showed increased melanogenesis in melanocytes and numerous melanosomes and melanosome complex in keratinocytes.
조광열(Gwang Yeol Joh),윤재일(Jai Il Youn),이유신(Yoo Shin Lee) 대한피부과학회 1987 대한피부과학회지 Vol.25 No.3
We report a case of solar urticaria being activated by both UVA and visible radiation and positive in passive transfer test by visible light, which was treated with sunlight and UVA radiation. A short course of treatment with sunlight produced no benificial effect. UVA phototherpy produced a rnarked increase in the minirnal urtication dose by UVA but there was no increased tolerance to sun exposure.
조광열(Gwang Yeol Joh),윤재일(Jai Il Youn),이유신(Yoo Shin Lee) 대한피부과학회 1985 대한피부과학회지 Vol.23 No.3
Solar urticaria is an uncommon disorder characterized by rapid development of urticarial reaction in areas of skin exposed to nonizing electromagnetic radiation. Herber and Baer classified solar urticaria into eight types on the basis of action spectrum and passive or reverse passive transfer ability. We report two cases of type ]g solar urticaria which were activated by visible light and negative in both passive and reverse passive transfer test.
조광열(Gwang Yeol Joh),이애영(Ai Young Lee),윤재일(Jai Il Youn),이유신(Yoo Shin Lee) 대한피부과학회 1984 대한피부과학회지 Vol.22 No.6
Becker's nevus or Becker's melanosis is a distinct clinical entity in which epimal thickening may be minimal and hairiness and pigmentation obvious. 1Ne report a case of 14-year-old female suffering from Beckers melanosis with multiple and extensive skin lesions. The electron microscope revealed that the melanocytes were bulky with increased melanogenesis and an increased number of melanosomes was found in the keratinocytes. In addition, a large number of melanosomes were seen individually in the keratinocytes.
조광열(Gwang Yeol Joh),이애영(Ai Young Lee),윤재일(Jai Il Youn),이유신(Yoo Shin Lee) 대한피부과학회 1985 대한피부과학회지 Vol.23 No.1
It has been generally assumed that eccrine poroma ariees from acroayringium, epidermal sweat duct unit. One of the characteriatics of thie structure is abaence of melanocytes and melanin granules among ite cells. Hmvever, a cornplete abeence of melanocytes and melanin granules in eccrine poroma is not invariable and a few reparts of such an occurrenee were presented, We report a case of eccrine poroma on the area below lateral malleolus af left foot. Microscpically melanin granules, confirmed by the use of Fontana Masson stain, were found in some of the tumor cells.
1P-161 Synthesis of the Mn<sup>2+</sup>-doped ZnSe@ZnS quantum dots
이유로,김종규,유정열,김우석,정운호,박선아,김은비,하태훈,이탁재 한국공업화학회 2017 한국공업화학회 연구논문 초록집 Vol.2017 No.1
Relatively monodisperse and highly luminescent Mn<sup>2+</sup>-doped ZnSe nanocrystals were synthesized in aqueous solution at 100°C using the nucleation-doping strategy. The effects were investigated systematically. Using 3-mercaptopropionic acid as capping ligand afforded 3.1 nm wide ZnSe:Mn quantum dots (QDs) with very low surface defect density and which exhibited the Mn<sup>2+</sup>related orange luminescence. The post-preparative introduction of a ZnS shell at the surface of the Mn<sup>2+</sup>-doped ZnSe QDs improved their photoluminescence properties, resulting in stronger emission. . Mn<sup>2+</sup>-doped ZnSe@ZnS QDs were investigated by X-ray differaction spectroscopy(XRD), UV-visible spectroscopy, Photoluminescence spectroscopy(PL). XRD confirms Mn<sup>2+</sup>-doped ZnSe@ZnS QDs nanocrystal structure. Because of the Ostwald ripening effect, UV spectrum was indicated red-shift. The absorption peak was indicated redshift. The PL of the clear orange solution was monitored in the course of the nanocrystal growth.
Ota 모반의 임상적 고찰 및 피부 이외의 부위의 색소침착
조광열(Gwang Yeol Joh),은희철(Hee Chul Eun),이유신(Yoo Shin Lee) 대한피부과학회 1986 대한피부과학회지 Vol.24 No.1
This study was undertaken to elucidate extracutaneous hyperpigmentation of nevus of Ota by analyzing the 70 patients who visited Cryosurgery Clinic in Seoul National University Hospital between January 1984 and March 1985 This results were as follows: 1. The age of onset showed two peaks: the first one was at birth or soon after birth; 27 cases(38. 6%) and the second une was between 11 and 17 years; 37 cases (45. 7%). 2 Seventy cases were classified by Taninos method: 15.7% was type I a, 27. l% type I b, 28. 6% type Il, 20. O% type g and 8. 6% type IV 3.Fifty two out of 70 cases who were examined at the department of ophtha1rnology: pigrnentation of sclera was observed in 29 cases(55. 8%.), of conjunctiva in 18 cases(34.6%), of uveal tract in 14 cases(26. 9A), of fundus in 14 cases (26. 9%) and of optic papilla in 2 cases(3. 8%). 4 Fifty two out of 70 cases who were examined at the department of Otorhinolaryngology. pigmentation of tympanum was observed in ]0 cases(23, 8%,), of nasal mucosa in 6 cases(14. 3p,), of oral mucosa in 5 cases(11, 9%), of external auditory canal in 4 cases(9 5%) and of pharynx in 1 case(2. 4%,)