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진공상온분사 공정을 이용한 세라믹 도료 분말의 장식용 코팅 및 패터닝 제조
박형권 ( Hyung Kwon Park ),김진영 ( Jin Young Kim ),권한솔 ( Han Sol Kwon ),이승태 ( Seong Tae Lee ),이창희 ( Chang Hee Lee ) 대한금속재료학회(구 대한금속학회) 2016 대한금속·재료학회지 Vol.54 No.8
Vacuum kinetic spraying (VKS) is a relatively advanced process, by which a dense film can be fabricated at room temperature. Various materials including ceramic, metal, polymer and composite can be used as the substrate and coating materials. In this research, red and blue color films were successfully fabricated on glass substrates using Co(Al, Cr)2O4 and C9H13CdN2O4SSe ceramic pigment powders in a VKS system. Although the deposition behavior of each powder differed according to particle size and/or materials, it was confirmed that the brightness and transmittance of the color film could be easily changed by controlling the process parameters. Furthermore, using masking technology, design color patterns were fabricated. As a result, it is cautiously expected that the VKS process can be utilized to produce decorative coating/patterning for product design. (Received January 6, 2016; Accepted March 17, 2016)
박형권 ( Hyung Kwon Park ),최현석 ( Hyun Seok Choi ),김영균 ( Young Gyun Kim ),오영하 ( Young Ha Oh ),유희준 ( Hee Joon Yu ),김정수 ( Joung Soo Kim ) 대한피부과학회 2016 대한피부과학회지 Vol.54 No.3
Histiocytic sarcoma is a rare, lymphohematopoietic malignant tumor comprised of tumor cells with the morphological and immunophenotypic features of mature histiocytes. A 35-year-old man presented with a disseminated histiocytic sarcoma that first occurred in the spinal cord and metastasized to the skin and lymph nodes. The tumor cells of the primary histiocytic sarcoma of the spinal cord were very large epithelioid cells with abundant eosinophilic cytoplasms and large, round-to-oval nuclei. In contrast, the metastatic histiocytic sarcoma of the skin was composed of relatively small polygonal cells with well-defined cell borders and high N/C (nucleus/cytoplasm) ratios. Immunohistochemically, both tumors were diffusely positive for histiocyte-associated antigens; but negative for epithelial, melanocyte, lymphoid, and dendritic cell antigens. It is important to recognize the morphological features and immunohistochemical characteristics of metastatic cells in order to ensure accurate diagnoses. (Korean J Dermatol 2016;54(3):199~202)
김영균 ( Young Gyun Kim ),박형권 ( Hyung Kwon Park ),정명길 ( Myeong Gil Jeong ),유희준 ( Hee Joon Yu ),김정수 ( Joung Soo Kim ) 대한피부과학회 2015 대한피부과학회지 Vol.53 No.10
Trichoepithelioma (TE) is a benign lesion that arises from hair follicles. Solitary TE occurs mainly on the face in young adults. Various previous reports have described the localization of this disorder, but there have been no reported cases with presentation on the toe. Histopathologically, TE shares characteristic features with basal cell carcinoma (BCC), so immunohistochemical stains are required for the differential diagnosis. Therefore, we report the first case of TE occurring on the toe, confirmed with immunohistochemial differentiation.
정상면역 환자의 발바닥에 미란성 반의 형태로 나타난 Candida famata 감염증
박병진 ( Byeong Jin Park ),최현석 ( Hyun Seok Choi ),박형권 ( Hyung Kwon Park ),김영균 ( Young Gyun Kim ),김정수 ( Joung Soo Kim ),유희준 ( Hee Joon Yu ) 대한피부과학회 2017 大韓皮膚科學會誌 Vol.55 No.7
Candida famata previously called Torulopsis famata or Debaryomyces hansenii, is usually found in natural substrates. It was earlier considered nonpathogenic in humans; however, a number of clinical cases of human infection have been reported showing isolation of this yeast. Dermatologic literature contains only a few reports regarding cutaneous infection caused by Candida famata. An 18-year old woman presented with a 4-month history of a 4.0×3.0 cm sized erythematous erosive patch on her left sole. A skin biopsy revealed numerous spores and hyphae in the epidermis. Histopathological specimens showed positive findings using the Periodic acid-Schiff and Gomori methenamine silver stains but negative findings using acid-fast bacilli stain. Cultures from skin scrapings yielded numerous colonies. Identification of the fungus was processed up to species level using VITEK 2 (bioMerieux, Inc. Hazelwood, MO, USA), and Candida famata was isolated. She was administered itraconazole at a dose of 200 mg once daily, and following 5 weeks of therapy, the erosive lesion was noted to have completely healed with postinflammatory hyperpigmentation. (Korean J Dermatol 2017;55(7):449∼453)
오수진 ( Su Jin Oh ),한성수 ( Sung Soo Han ),박형권 ( Hyung Kwon Park ),유희준 ( Hee Joon Yu ),김정수 ( Joung Soo Kim ) 대한피부과학회 2017 大韓皮膚科學會誌 Vol.55 No.9
Nevus sebaceous is a common congenital cutaneous hamartoma occurring mainly on the face and scalp. It is well known that secondary neoplasms can be easily observed in the primary lesion. However, a case of trichoblastoma and compound nevus concurrently arising from nevus sebaceous has not been previously reported. A 26-year-old woman presented with a well-demarcated atrophic skin-colored plaque on her scalp from birth. On the plaque, a black dome-shaped round nodule and a brownish nodule with irregular margins were found one week previously without subjective symptoms. Histopathological examination of the central plaque lesion revealed epidermal hyperplasia and hyperplasia of the sebaceous glands and eccrine glands. In addition, ectopic, dilated apocrine glands were revealed in the lower dermis, and the hair follicles remained small and primordial, consistent with nevus sebaceous. A section of the black nodule showed palisading basaloid cells surrounded by abundant fibrous stroma. Nests of nevus cells were found at the dermo-epidermal junction and dermis in the brownish nodule. Based on these findings, the black nodule and brownish nodule were diagnosed as trichoblastoma and compound nevus, respectively. Herein, we report an interesting case of trichoblastoma and compound nevus concurrently arising from nevus sebaceous, which is, to our knowledge, the first such report in the dermatologic literature. (Korean J Dermatol 2017;55(9):615∼618)