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참나무류의 경제적 이용에 관한 연구 : 경기도 도유림을 대상으로
최준석,박태식 한국임학회 1987 한국산림과학회지 Vol.76 No.1
本 硏究는 참나무類의 合理的 利用方案을 考察하고자 참나무類가 闊葉樹의 大部分을 차지하는 京畿道 道有林을 對象으로 道有林事業所에서 直接 펄프用材林, 木炭生産, 표고 栽培 等을 實施하였을 때 投資收益性을 分析하였다. 分析方法은 B-C分析의 財務分析을 試圖하였으며 投資效率指標로 純收益現在價値(NPW)와 財務投資收益率(F. R. R)을 使用하였다. 펄프用材林, 木炭生産, 표고 栽培에 關한 投資收益性 分析結果는 다음과 같다. ① 펄프用材林을 造成하여 伐期齡 25年으로 集約的 施業을 하였을 때 地位指數 16의 收穫量을 적용하면 FRR은 6.7%, 割引率 5%에서 B/C ratio는 1.50으로 계산되었다. 또한 粗放的 施業을 하였을 경우 割引率 10%에서는 地位에 관계없이 收益性이 없고 割引率 7.52% 以下에서는 어느 地位를 莫論하고 收益性이 保障된다. 伐期齡 20年으로 粗放的 施業을 할 경우에는 地位指數 12 以上에서는 割引率 10%에서 收益性이 있었다. ② 정상적인 林木價 形成이 어려운 奧地山林을 木炭生産으로 利用할 경우 林木價는 7,800원/㎥∼21,000원/㎥으로 形成되고 木炭生産林을 造成하여 粗放的 施業을 하였을 때 伐期齡 25年에서 F·R·R은 6.07%, B/C ratio는 割引率 5%에서 1.11로 나타났다. ③ 참나무類를 利用하여 道有林內 표고 栽培를 實施하면 F·R·R은 17.54, 割引率 10%에서 B/C ratio는 1.14로 收益性이 있었다. 따라서 道有林內 참나무類의 現實的 收入을 確保하기 위하여는 一般用材, 木工藝材로서의 利用이 낮아 정상적 林木價를 形成하지 못하는 林木 및 運搬이 어려운 奧地山林에서는 木炭生産을, 集約的 施業이 可能한 곳에서는 펄프用材林으로 표고 栽培가 可能한 곳은 표고 資木으로 利用하는 것이 바람직하다.
Intraosseous hemangioma of the orbit
최준석,배용찬,강규빈,최경운 대한두개안면성형외과학회 2018 Archives of Craniofacial Surgery Vol.19 No.1
Intraosseous hemangioma is an extremely rare tumor that accounts for 1% or fewer of all osseous tumors. The most common sites of its occurrence are the vertebral column and calvaria. Occurrence in a facial bone is very rare. The authors aim to report a case of the surgical treatment of intraosseous hemangioma occurring in the periorbital region, which is a very rare site of occurrence and to introduce our own experiences with the diagnosis and treatment of this condition along with a literature review. A 73-year-old male patient visited our hospital with the chief complaint of a mass touching the left orbital rim. A biopsy was performed by applying a direct incision after local anesthesia. Eventually, intraosseous hemangioma was diagnosed histologically. To fully resect the mass, the orbital floor and zygoma were exposed through a subciliary incision under general anesthesia, and then the tumor was completely eliminated. Bony defect was reconstructed by performing a seventh rib bone graft. Follow-up observation has so far been conducted for 10 months after surgery without recurrence or symptoms.
A rare case of isolated schwannoma in infraorbital nerve
최준석,박상민,최경운 대한두개안면성형외과학회 2018 Archives of Craniofacial Surgery Vol.19 No.3
A schwannoma is a benign tumor that develops from Schwann cells. It is known to occur more frequently in women than men, and about one third of schwannoma cases occur in the head and neck area. It is also known to originate mainly in the auditory nerve. However, it is rarely associated with the trigeminal nerve, and especially, schwannomas related to the infraorbital nerve are very rare. we report a rare case of a schwannoma involving the infraorbital branch of the trigeminal nerve in a 45-year old male adult. The patient underwent physical examination and magnetic resonance imaging. The mass was approached through subciliary approach that is familiar to the plastic surgeon and completely resected. Histopathological findings showed pointed to a benign schwannoma. Infraorbital nerve schwannoma is difficult to distinguish from other diseases by means of clinical symptoms, physical findings, or imaging. In spite of its rarity, infraorbital nerve schwannoma may be considered a possible diagnosis in the case of mass on cheek. Assessment by computed tomography or magnetic resonance imaging is necessary for proper diagnosis. About the surgical approach, excision through the subciliary approach should be considered rather than the direct transfacial approach in view of stability, cosmetic effects, and familiarity.