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권중근 대한기계학회 2008 기계저널 Vol.48 No.6
이 글에서는 RCM에 대하여 간략히 소개하고, 최근 그 변종으로 등장하고 있는 약식(Streamlined) RCM에 대한 의견을 제시해보기로 한다.
권중근,Yoo Jingi,Win Nay Myo,Maung The-Thiri,Naing Aung Htay,Cho Young-Je,Jung Hee-Young,강인규 한국원예학회 2022 원예과학기술지 Vol.40 No.4
Cell wall constituents and cell wall hydrolase (CWH) enzyme activities play crucial roles in extending the postharvest storability of apples. 1-Methylcyclopropene (1-MCP) has been extensively used to regulate cell wall metabolism of apples during storage. However, the consequences of 1-MCP can differ according to its concentration and the cultivar being treated. In this study, we investigated how 1-MCP concentrations (0.5 and 1.0 µL·L-1) regulate the cell wall components and the activities of CWH in two new apple cultivars, ‘Arisoo’ and ‘Picnic’, during their cold storage. In 1-MCP-treated fruits, uronic acid (UAC) and total sugar contents (TSC) were significantly higher in ‘Arisoo’, but only UAC was significantly higher in ‘Picnic’, when compared with control fruits. 1-MCP significantly inhibited CWH activities in both cultivars. The results observed between 0.5 and 1.0 µL·L-1 did not diverge obviously in ‘Arisoo’, however, 0.5 µL·L-1 generated better results over 1.0 µL·L-1 in ‘Picnic’. Conclusively, the results suggest that it is economically more appropriate to use 0.5 µL·L-1 1-MCP to extend the postharvest storability of apples, especially ‘Arisoo’, because of its ability to delay the solubilization of fruit softening-related cell wall components and to suppress CWH enzyme activities.
권중근,김시형,백승문,남정권 대한이비인후과학회 2004 대한이비인후과학회지 두경부외과학 Vol.47 No.8
A large vestibular aqueduct, an isolated anomaly of temporal bone, is relatively rare and its association with sensorinerual hearing and sacs in four ears of our two patients. Signal intensity of enlarged endolymphatic sac that is detected higher than that of CSF in Fluid Atenuated Inversion Recovery (FLAIR) image may indicate poor prognisis with respect to bone conduction threshold in pure tone audiogram.
성문상부에 발생한 재발성 전형적 카르시노이드 종양 1예
권중근,정혜수,서병삼,차희정 대한이비인후과학회 2005 대한이비인후과학회지 두경부외과학 Vol.48 No.1
Neuroendocrine neoplasms of larynx are a rare group of tumors that include typical carcinoid, atypical carcinoid, small cell neuroendocrine carcinoma and paraganglioma. Among them, typical carcinoid is the least common type and the treatment and prognosis is different from the other tumors. We report a case of recurrent typical carcioid of supraglottis with interval of 5 years, which were excised locally at each time. As far as we know, this is the 15th case of a typical carcinoid of larynx. (Korean J Otolaryngol 2005;48:121-3)
권중근,정혜수,서병삼,김영민 대한이비인후과학회 2005 대한이비인후과학회지 두경부외과학 Vol.48 No.12
Kttner tumor or chronic sclerosing sialadenitis is a benign inflammatory condition of the salivary gland that mimics a malignant neoplasm clinically because of its presentation as a hard mass. The cause of this inflammatory is still unknown. The effect of microliths, infectious agents, secretory dysfunctions, duct abnormalities, and immune processes have been considered. Histologically, it is characterized by progressive periductal sclerosis, acinar atrophy, and dense infiltration of lymphocytes. Kttner tumor is best diagnosed by open or excisional biopsy. We report one case of Kttner tumor of right submandibular gland in a 42 year old man.
A Case of Nevus Lipomatosus Cutaneous Superficialis
권중근,백승문,안성기,유화경 대한비과학회 2002 Journal of rhinology Vol.9 No.1
Nevus lipomatosus cutaneous superficialis is a very rare disorder characterized by nevoid fatty growth in the dermis. Itusually arises in the pelvic girdle, so is unfamiliar to most otolaryngologists. A case of a 72-year-old male with nevuslipomatosus cutaneous superficialis in the nasal cavity is presented with a brief review of the disease.
권중근,김시형,유화경,안성기 대한이비인후과학회 2002 대한이비인후과학회지 두경부외과학 Vol.45 No.8
Acute visual loss may occur in association with sinusitis either as a complication of orbital cellulitis or, less frequently, as a part of the orbital apex syndrome. Originally, an orbital apex syndrome is asociated with an afection of the vesels and ne-rves pasing through the superior orbital fisure and the optic foramen. A clasical feature of orbital apex syndrome is emosis, or lid edema. We present a case of male patient with alternating bilateral visual loss with ophthalmoplegia secondary to paranasal sinusitis. (Korean J Otolaryngol 2002;45:825-7)
권중근,정혜수,서병삼,박기철,양진석,남정권,김재광 대한이비인후과학회 2005 대한이비인후과학회지 두경부외과학 Vol.48 No.7
Background and Objectives:This study investigates the effect of patient controlled analgesia (PCA) on post-tonsillectomy pain for the first two weeks of operation, and its effects on the postoperative bleeding and the pain duration. Subjects and Method:In a prospective group study, 43 patients with tonsillectomy were studied. PCA was applied for 48 hours after surgery. Pain scores, postoperative bleeding, and pain duration were compared. Results:PCA reduced postoperative pain during the time it was appled but pain was worse after disconnection. There were no differences between the groups regarding postoperative bleeding and recovery time. Conclusion:PCA could effectively control the post-tonsillectomy pain only during its application period. It was not helpful for long term pain control, pain duration, or post-tonsillectomy bleeding. Other long lasting and effective pain control method should be administered to reduce post-tonsillectomy pain during the recovery period.
N -Nitrosodimethylamine의 자외선 광분해 시 질소산화물 생성에 미치는 반응성 화학종의 형성
권중근(Kwon, Joongkuen),김종오(Kim, Jongoh),권범근(Kwon, Bumgun) 한국지반환경공학회 2012 한국지반환경공학회논문집 Vol.13 No.2
NDMA는 잠재적인 발암 물질로 잘 알려져 있기 때문에 UV를 활용한 처리기술과 분해경로에 대해 많은 연구가 이루어졌다. 그러나 NDMA가 NO2<SUP>-</SUP>, NO3<SUP>-</SUP>와 같은 산화물을 형성하는 메커니즘은 아직 명확하게 알려져 있지 않다. 본 연구에서는 NDMA의 광반응에 의해 생성되는 핵심 반응기들을 검토하였다. 주요 반응기들에 대한 연구는 질소 산화물들의 형성과 메탄올과 NDMA의 광분해에 의해 형성되는 미지의 반응기들 사이에서의 반응을 통하여 간접적으로 수행하였다. NDMA의 직접적인 UV 광반응에 의해서 생성된 ONOO<SUP>-</SUP>가 질소 산화물(중간생성물)들의 산화로 인한 NO2<SUP>-</SUP>와 NO3<SUP>-</SUP>의 핵심 반응기인 것으로 확인되었다. Because N-Nitrosodimethylamine(NDMA) is well-known as a potential carcinogen, extensive research has addressed its treatment by ultraviolet(UV) and its degradation pathway. However, the detailed mechanism by which NDMA is photolyzed to form oxidized products, i.e., NO2<SUP>-</SUP> and NO3<SUP>-</SUP>, is still not understood. This study reveals a key reactive species during the photolysis of NDMA. The study on a key reactive species was indirectly performed with the formation of nitrogen oxidized products and reactions between methanol and an unknown reactive species formed during the photolysis of NDMA. The peroxynitrite(ONOO<SUP>-</SUP>) generated by the direct UV photolysis of NDMA would be identified as a key reactive species in oxidizing nitrogen intermediates to NO2<SUP>-</SUP> and NO3<SUP>-</SUP>.