악하선과 갱구개에 발생한 다형성 선종의 치험례

하종운(Jong Woon Ha) 대한악안면성형재건외과학회 1994 Maxillofacial Plastic Reconstructive Surgery Vol.16 No.2

Pleomorphic adenoma(benign mixed tumor) is the most common tumor of the major salivary glands, constituting approximately 70 per cent of benign tumors of these glands. The term mixed tumor was introduced in the nineteenth century to stress the dual origin of this neoplasm from epithelial and mesenchymal elements, and the designation pleomorphic adenoma is preferred because it emphasizes both the epithelial origin and the variety of histological patterns found in this common salivary gland lesion. Rauch, in a review of 4245 pleomorphic adenomas, found 92.5 per cent in the major salivary glands and 6.5 per cent in the minor salivary glands, 8 per cent arose in the submandibular glands, and in another large series of over 6,000 cases, approximately 4 per cent arose in the hard and soft palates with equal frequency in each. The prognosis of pleomorphic adenoma depends more upon the choice and adequacy of treatment than upon histological appearances. The accepted treatment for this tumor is surgical excision. With adequate surgery recurrence rates of less than 1 per cent can be obtained. In this hospital, I experienced two patients who were identified PMA which occured in the hard palate and submandibular gland. The lesions were successfully treated by surgery.

차나무 추출물을 이용한 골프장의 지렁이 샘플링과 종류 조사

하종원,홍용,이상명,추호렬,김진호,이동운,Ha, Jong-Won,Hong, Yong,Lee, Sang-Myeong,Choo, Ho-Yul,Kim, Jin-Ho,Lee, Dong-Woon 한국잔디학회 2010 한국잔디학회지 Vol.24 No.2

Effective sampling method and distribution of earthworms in turfgrasses of golf courses were investigated at 10 Korean golf clubs. Tea tree extract was highly effective in extracting Eisenia andrei compared with mustard oil or formalin. 1000-fold diluent of tea tree extract (4 L/$m^2$) was more effective than 500- and 2000-fold. Sampling efficacy of earthworm increased as soil depth decreased. Additional watering after treatment of tea tree extract did not significantly influence the sampling of earthworms. Eight earthworm species in 4 genera were collected from turfgrasses of 10 golf courses with 4 L of 1000-fold diluent of tea tree extract (15% tea saponin)/$m^2$. Among, dominant earthworm was Amynthas heteropodus and collected 147 individuals from 6 golf clubs. Thirteen Drawida japonica was collected from 3 golf clubs and A. hilgendorfi and A. hupeiensis were collected from 2 golf clubs. A. hupeiensis was not collected with 1000-fold diluent of tea tree extract (15% tea saponin)/$m^2$. 골프장 잔디에서 효과적으로 지렁이를 추출하는 방법과 골프장의 잔디에 서식하는 지렁이의 종류를 알아보기 위하여 연구를 수행한 결과, 차나무추출물이 mustard oil이나 formalin에 비하여 붉은줄지렁이(Eisenia andrei)의 추출에 효과가 있었다. 그리고 차나무추출물 1000배 처리가 (4 L/m2)가 500배와 2000배 처리에 비하여 효과가 높았다. 토양 내 서식 깊이가 얕을수록 추출효과가 높았다. 그러나 차나무추출물 처리 후 추가적인 관수는 추출에 크게 영향을 미치지 않았다. 우리나라 10개 골프장에는 4속 8종의 지렁이가 분포하고 있었다. 그 중 변이성지렁이(Amynthas heteropodus)가 6개 골프장에서 147개체가 채집되어 우점종이었으며 염주위지렁이(Drawida japonica)가 3개 골프장에서 13개체가 채집되었고, 외무늬지렁이(A. hilgendorfi)와 똥지렁이(A. hupeiensis)가 2개 골프장에서 채집되었다. 차나무추출물로는 똥지렁이가 탈출되지 않았다.

하악치은에 발생한 평활근육종의 치험례

조은영,하종운,김은철,정윤심,Cho, Eun-Young,Ha, Jong-Woon,Kim, Eun-Cheol,Jeong, Yun-Shim 대한구강악안면외과학회 2001 대한구강악안면외과학회지 Vol.27 No.4

Leiomyosarcoma(LMS) is a malignant tumor from smooth muscle origin that arises most commonly in the gastrointestinal tract and uterus, but rarely in the oral and maxillofacial area which lacks smooth muscles. 63 cases of oral LMS have been reported, especially LMS that occurred in the mandibular gingiva is only 2 cases. Major symptom of oral LMS is painful or painless swelling. Besides it, oral LMS has no specific characteristics. So it is difficult to diagnose the case as LMS of the oral cavity. Certain cases report that LMS of the oral cavity was misdiagnosed as periodontitis and the patients were treated with unnecessary procedures. Conventional treatment of LMS is the radical surgical excision. LMS that is infiltrative and very malignant has poor prognosis despite of well-circumscribed boundary. LMS of the oral cavity is often recurred, has high rate of distant metastasis and 5-year-survival rate is as low as 23%. This article reports LMS of the mandibular gingiva that treated with surgical intervention, had local recurrence and metastasis to the lymph node after 16-month's follow-up examination.

고분자 절연막과 계면을 이루는 도너-억셉터형 반도체성 고분자 박막의 전기적 특성

이주한 ( Ju-han Lee ),김도연 ( Doyeon Kim ),하종운 ( Jong-woon Ha ),윤민호 ( Minho Yoon ),이지열 ( Jiyoul Lee ),황도훈 ( Do-hoon Hwang ) 한국화상학회 2021 한국화상학회지 Vol.27 No.2

본 연구에서는 새로 설계한 고분자 절연체 위에 전자 주개(Donor)-받개(Acceptor) 기반의 반도체성 공중합체인 Cyclopentadithiophene-alt-benzothiadiazole (CDT-BTZ)를 활성 반도체층으로 형성하여 제작한 고분자 반도체 전계효과 트랜지스터의 전기적 특성을 살펴보았다. 이 연구에서 제시하는 고분자 절연체 박막은 내열성과 전기절연성이 우수한 포스파젠과 멜리민 구조가 가교된 형태를 가지기 때문에 0.006 nm의 매우 평탄한 RMS 표면 거칠기를 가졌으며, 4.5 MV/cm 이상의 매우 우수한 절연강도와 1.55의 다소 낮은 유전 상수를 가진 것으로 측정되었다. 그리고, 고분자 절연막과 계면을 이루는 CDT-BTZ D-A 타입 반도체성 공중합체 박막은 2.0 x 10^-3 ㎠/Vs의 선형영역 이동도와 1.0 x 10^-3 ㎠/Vs의 포화영역 이동도를 갖는 것으로 측정되었다. 이를 통해, 고분자 절연체 위에 형성된 CDT-BTZ 고분자 반도체 박막은 유연 전자회로의 스위칭 소자로 쓰이기에 충분한 잠재성이 있다고 여겨진다. In this study, the electrical properties of a polymer semiconductor field-effect transistor (PFET), where a Cyclopentadithiophene-alt-benzothiadiazole (CDT-BTZ) based electron donor-acceptor (D-A) type semiconducting copolymer layer on newly-designed polymer insulating films used as an active semiconductor layer, were investigated. The self-crosslinked polymer insulator thin-film had a very flat surface with an RMS roughness of 0.006 nm, a good dielectric strength of 4.5 MV/cm and a dielectric constant of 1.55. The CDT-BTZ based D-A type semiconducting copolymer film interfacing with the self-crosslinked polymer insulating layer was measured to have a linear region mobility of 2.0 x 10^-3 ㎠/Vs and a saturation region mobility of 1.0 x 10^-3 ㎠/Vs. Thus, the CDT-BTZ based D-A type semiconducting copolymer film formed on the new polymer insulating layer is believed to have sufficient potential to be used as a switching device for flexible electronic circuits.

顎下腺과 硬口蓋에 발생한 多形性 腺腫의 치험례

하종운 大韓顎顔面成形再建外科學會 1994 Maxillofacial Plastic Reconstructive Surgery Vol.16 No.2

Pleomorphiic adenoma(benign mixed tumor) is the most common tumor of the major salivary glands, constituting approximately 70 per cent of benign tumors of these glands. The term mixed tumor was introduced in the nineteenth century to stress the dual origin of this neoplasm from epithelial and mescenchymal elements, nd the designation pleomorphic adenoma is preferred because it emphasizes both the epithelial origin and the variety of histoological patterns found in this common salivary gland lesion. Rauch, in a review of 4245 pleomorphic adenomas, found 92.5 per cent in the major salivry glands and 6.5 per cent in the minor salivary glands, 8 per cent arose in the submandibular glands, and in another large series of over 6,000 cases, approximately 4 per cent arose in the hard and soft palates with equal frequency in each. The prognosis of pleomorphic denoma depends more upon the choice and adequacy of treatment than upon histologi치 appeances. The accepted treament for this tumor is excision. With adequate surgery recurrence rates of less than 1 per cent can be obtained. In this hospital, I experienced two patients who were identified PMA which occurred in the hard palate and submandibular gland. The lesions were successfully treated by surgery.

경부에 발생한 침습성 지장종의 치험례

조은영,하종운,김영빈,정윤심 대한악안면성형재건외과학회 2001 Maxillofacial Plastic Reconstructive Surgery Vol.23 No.2

Lipomas make up 4∼5% of all benign tumors in the body and are most often located on shoulders and backs. Neck lipomas are often developed in the subcutaneous tissues of the posterior neck, Most lipomas have slow growth rate and the recurrence is very rare after surgical excision because of well-defined border. But lipoma originated from muscles(intramuscular and intermuscular lipoma), so called infiltrating lipoma, has ill-defined border and little or no evidence of encapsulation. Histologically the feature of infiltrating lipoma is distinctive. There is a consistent infiltration with dissociation of the surrounding muscle fibers. The overall recurrence rate is less than 5%, but rises to 62.5% when deep infiltrating lipomas are considered separately. Thus infiltrating lipoma is best excised with a margin of normal muscle to avoid recurrence. Its location in the head and neck is uncommon. 18 cases of infiltrating lipoma in the head and neck has been reported to date. Here we report a case of infiltrating lipoma that arises in the head and neck muscle with a review of the literature on the subject.

하악치은에 발생한 평활근육종의 치험례 : A CASE REPORT

조은영,하종운,김은철,정윤심 大韓口腔外科學會 2003 大韓口腔外科學會誌 Vol.27 No.4