• 한국환경생태학회지
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• 제12권4호
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• pp.301-316
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• 1999

본 조사는 1998년 5월부터 9월까지 총 8일간 한려해상국립공원 지역의 관속식물상을 조사한 결과 125과, 396속, 573종, 83변종, 11품종 3교잡종 총 670종류(taxa)로 조사되었다. 이 중 남해지역은 117과, 296속, 373종, 53변종 7품종, 3교잡종 총 436종류(taxa), 가라산지역은 73과, 129속, 153종, 16변종 2품종 총171종류(taxa), 통영지역은 97과 280속, 475종, 53변종, 5품종, 1교잡종 총 434종류(taxa)로 각각 조사되었다. 한려해상국립공원 지역은 도로와 이들 주변의 위락시설 및 관상수 농장 등으로 인해 다른 국립공원 지역과 비교할 때 식생의 파괴가 심각한 것으로 조사되었으며, 이들 지역의 특징적인 식생과 식물상을 적극적으로 보전하기 위한 대책이 시급히 필요하다고 판단된다.

• 한국환경생태학회:학술대회논문집
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• 한국환경생태학회 1999년도 정기총회 및 학술논문 발표회
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• pp.120-123
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• 1999

• Restorative Dentistry and Endodontics
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• 제47권1호
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• pp.10.1-10.11
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• 2022

Objectives: This study aimed to investigate the color stability, solubility, and surface characteristics of 3 calcium silicate-based cements (CSCs) after immersion in different solutions. Materials and Methods: ProRoot white mineral trioxide aggregate (MTA), Biodentine, and Endosequence Root Repair Material (ERRM) were placed in cylindrical molds and stored at 37℃ for 24 hours. Each specimen was immersed in distilled water, 5% sodium hypochlorite (NaOCl), 2% chlorhexidine, or 0.1% octenidine hydrochloride (OCT) for 24 hours. Color changes were measured with a spectrophotometer. Solubility was determined using an analytical balance with 10^-5 g accuracy. The surface characteristics were analyzed using scanning electron microscopy and energy-dispersive spectroscopy. Data were analyzed using 2-way analysis of variance, the Tukey test, and the paired t-test. Results: MTA exhibited significant discoloration in contact with NaOCl (p < 0.05). White precipitation occurred on the surfaces of Biodentine and ERRM after contact with the solutions, and none of the materials presented dark brown discoloration. All materials showed significant solubility after immersion in the solutions (p < 0.05), irrespective of the solution type (p > 0.05). The surface topography and elemental composition of the samples showed different patterns of crystal formation and precipitation depending on the solution type. Conclusions: All materials presented some amount of solubility and showed crystal precipitation after contact with the solutions. Biodentine and ERRM are suitable alternatives to ProRoot MTA as they do not exhibit discoloration. The use of OCT can be considered safe for CSCs.