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TiO_2 광촉매를 이용한 Cu(II)-EDTA 의 산화에서 용존산소와 Cu(II)와 EDTA 초기 당량의 영향
정홍호,성기웅,조영현,이영석,최상원 한국환경과학회 2002 한국환경과학회지 Vol.11 No.1
The effects of initial concentration of dissolved oxygen content, Cu(Ⅱ) and EDTA in an aqueous Cu (Ⅱ)-EDTA solution on TiO_2 photo-oxidation of EDTA were investigated using TiO_2 (Degussa P-25) and UV irradiation at 20℃. In the presence of dissolved oxygen and/or Cu(Ⅱ) the photo-oxidation rates of EDTA were enhanced. The rates linearly increased in the range of initial Cu(Ⅱ) concentration below 1.79 mM, while above this concentration those were kept constant. The trend of the EDTA photo-oxidation rates appeared to be akin to the Langmuir-Hinshelwood equation form and the k values calculated were 0.05 mM/min for the free-EDTA system, and 0.17 mM/min for the Cu(Ⅱ)-EDTA system. These meant the aqueous EDTA decomposition was enhanced due to weakening of the intra-molecular bond strength of EDTA by complexation with Cu(Ⅱ) added. It was concluded the decomposition of aqueous EDTA by TiO_2 photo-oxidation was maximum in the presence of dissolved oxygen supplied by air purging and of Cu(Ⅱ) with its concentration for 1:1 Cu(Ⅱ)-EDTA complexation ratio.
정병욱,박동일,이준희,서정욱,원유홍,김웅,신현종,권영무 동국대학교 경주대학 1996 東國論集 Vol.15 No.-
합병증이 동반된 Meckel씨 게실을 가진 환자의 치료에 대한 필요성은 과정이 문제이다. 하지만 우연히 만나는 게실의 처치는 논란 중이다. 부수적인 게실 절제술(incidental diverticulectomy)의 제안자는 증상이 있는 게실의 외과적 처치는 중요한 이환 및 사망률은 지적한다. 이를 반대하는 사람들은 전 생애를 통해 합병증의 위험성이 낮게 나타나므로 필요가 없다고한다. 게실의 예방적 제거는 개복술시 우연히 발견 될 때 시행한다. 이는 남아있는 게실이 나중에 합병증을 일으키는 것보다 술후 합병증의 위험성이 매우 적음을 알 수 있다. 저자들은 합병증이 동반된 Meckel씨 게실 2예를 경험하였기에 문헌 고찰과 더불어 보고하는 바이다. The necessity for therapy with complicated Meckel's diverticular is a matter of course.However, management of the incidentally encountered diverticulum is controversial. Proponents of incidental diverticulectomy point to the significant morbidity and mortality rates of surgical treatment of symptomatic divenicular. Other authors base their opposition to incidental diveniculectomy on the low risk of complications developing during lifetime. Prophyillctic removal of the diveniculum is indicated when it is found incidentally at laparotomy, because there are few postoperative complications and the risk exists that the remaining diverticulum may be the cause of later complication. The 2 cases of complicated Meckel's diverticulum are reported with a brief review of literature.
박정수(Cheong Soo Park),정웅윤(Woung Youn Chung),장항석(Hang Seok Chang),이미경(Mi Kyung Lee) 대한두경부종양학회 1999 대한두경부 종양학회지 Vol.15 No.1
Objective: The expression of Ki67, a proliferation marker, and p27, a cyclin dependent kinases(CDKs) inhibitor, has been studied in various human neoplasms. This study was carried out to determine whether these markers are useful in distinguishing benign from malignant lesions of the thyroid or predicting biologic behavior of malignant lesions. Material and Methods: Using immunohistochemical techniques with monoclonal antibodies to Ki67 and p27, we analyzed the expression of Ki67 and p27 in various thyroid disorders(25 follicular adenomas, 47 follicular carcinomas, 16 papillary carcinomas, 20 adenomatous goiters and 40 normal thyroid tissues). The labeling indices(LIs) were determined by counting cells expressing these markers in 1000 cells per immunostained slide. Results: Neoplastic thyroid diseases showed higher expression of Ki67 and lower expression of p27 than non-neoplastic diseases(p LI=55.4±5.7) and follicular carcinomas( LI=23.2±10.2). There was, however, no significant correlation between the degree of Ki67 and p27labeling indices and types of carcinoma or clinical aggressiveness of diseases. Conclusion: The degree of Ki67 and p27 expression was useful in distinguishing between benign from malignant thyroid lesions, particulary between follicular adenoma and follicular carcinoma, but was not directly proportional to the tumor aggressiveness.
이잔디,남기현,임치영,장항석,정웅윤,박정수,Jandee Lee,M.D.,Kee-Hyun Nam,M.D.,Chi-Young Lim,M.D.,Hang-Seok Chang,M.D.,Woung Youn Chung,M.D. and Cheong Soo Park,M.D. 대한갑상선-내분비외과학회 2005 The Koreran journal of Endocrine Surgery Vol.5 No.2
Forgotten mediastinal goiter is an extremely rare disease. It is most often the consequence of the incomplete removal of a 'plunging' goiter, but it can sometimes be attributed to a concomitant, unrecongnized primary mediastinal goiter which is not connected to the thyroid. A primary mediastinal goiter(autonomous intrathoracic goiter) essentially caused by an abnormal embryonic development of the thyroid gland and a thyroid gland formation located in the thorax or the mediastinum. The differential diagnosis with ordinary recurrence was based on the absence of parenchymatous or vascular connections with the cervical thyroid gland. It is fed by local intrathoracic vessels and observed in the absence of previous thyroidectomy. Nevertheless, for primary mediastinal goiter, sternum-splitting incision will be required in most cases as troublesome mediastinal bleeding may occur which is difficult to control from a cervical collar incision. In this study we report a case of forgotten mediastinal goiter and review the various diagnostic and therapeutic problems posed by the condition. A number of possible solutions that can be implemented for this diasease are identified. (Korean J Endocrine Surg 2005;5:114-117)
박정수(Cheong Soo Park),홍순원(Soon Won Hong),장항석(Hang Seok Chang),윤종호(Jong Ho Yoon),정웅윤(Woung Yoon Chung),이승아(Seung Ah Lee) 대한두경부종양학회 2003 대한두경부 종양학회지 Vol.19 No.1
Branchial cleft cysts typically are characterized as lateral swellings anterior to sternocleidomastoid muscle in upper third of the neck. However, cysts have been reported in unusual location such as the thymus, oral cavity, parotid gland, pancreas, and thyroid. Perithyroidal branchial cleft cysts are also rare and preoperative diagnosis is very difficult. Recently we have experienced a case of intrathyroidal branchial cleft cys and a case of perithyroidal branchial cleft cyst, which were diagnosed preoperatively as the parathyroid cyst. So, we report these two cases with review of the literatures.
가족성 대장 용종증과 동반된 유두상 갑상선암의 소공질-상실양 변이(Cribriform-morular Variant) 2예
이잔디,이시훈<SUP>1<,SUP>,임치영,남기현,장항석,정웅윤,박정수,Jandee Lee,Sihoon Lee,<SUP>1<,SUP>,Chi-Young Lim,Kee-Hyun Nam,Hang-Seok Chang,Woung Youn Chung and Cheong Soo Park 대한갑상선-내분비외과학회 2005 The Koreran journal of Endocrine Surgery Vol.5 No.2
Cribriform-morular variant (CMV) is a rare histologic subtype of papillary thyroid carcinoma (PTC). Patients with familial adenomatous polyposis (FAP) could be associated with several comorbid diseases including thyroid cancer. Most thyroid cancers in them are PTCs, but infrequently CMV types can occur. The FAP concomitant CMV-PTCs are found predominantly in young women and reveals lower recurrence rate. Moreover, this variant shows circumscribed morphology and rarely metastasizes to node. Because the incidence of thyroid carcinoma is higher than that in general population, comprehensive evaluation of thyroid gland should be performed for the patients with FAP. Because thyroid cancer could be first manifestation of FAP, colonic screening should be considered in CMV-PTC patient. We report two cases of CMV-PTCs concurrent with FAP. (Korean J Endocrine Surg 2005;5:109-113)