• Proceedings of the Korean Society of Applied Pharmacology
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• 1993.04a
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• pp.48-48
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• 1993

항종양성 물질의 탐색과 개발을 지향한 해양생물유래의 생물활성물질의 화학적 연구의 일환으로서 해조류(12종류), 해면동물(3종류), 강장동물(2종류). 극피동물(4종류), 연체동물(10종류) 및 원색동물(2종류)의 각 용매분획을 대상으로 brine shrimp bioassay에 의한 세포독성을 검색한 결과, 극피동물의 별불가사리 초산에틸액스(LC$_{50}$: 283$\mu\textrm{g}$/ml) 및 해삼 클로르포름엑스(LC$_{50}$: 274$\mu\textrm{g}$/ml) , 연채동물의 보말고동 부타놀액스(LC$_{50}$: 263$\mu\textrm{g}$/ml) 및 따게비의 물엑스(LC$_{50}$: 360$\mu\textrm{g}$/ml)에서 가장 강력한 세포독성이 관찰되었다. 그리고 생물별로 살펴본 세포독성빈도는 극피동물이 가장 유망한 것으로 생각되었다.로 생각되었다.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• autumn
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• pp.353-358
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• 2001

Since the financial crisis broke out, liquidity has become the critical issue in housing construction industry. In order to secure liquidity, it is prerequisite to precisely forecast cash flow. However, construction companies have failed to come up with a systematic process to manage and forecast cash flow. Until now, companies have solely relied on the prediction of profits and losses, which is carried out as they review business feasibility. To obtain more accurate cash flow forecast model, practical pattern of payments should be taken into account. In this theory, basic model that analyzes practical housing payment collection pattern resulting from prepayments and arrears is described. This model is to complement conventional cash flow forecast scheme in the phase of business feasibility review. Analysis result on final losses in cash that occur as a result of prepayment and arrears is considered in this model. Additionally, in the estimation of construction cost in the phase of business feasibility review, real construction prices instead of official prices are applied to enhance accuracy of cash outflow forecast. The proportion of payment made by a bill and changes in payment date caused by rescheduling of a bill are also factored in to estimate cash outflow. This model would contribute to achieving accurate cash flow forecast that better reflect real situation and to enhancing efficiency in capital management by giving a clear picture with regard to the demand and supply timing of capital.