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기능성물질 첨가시 느타리버섯 생육 및 생리활성물질의 변화
박재성,최재선,최성열,송인규,윤태,이준수,구창덕 한국버섯학회 2009 한국버섯학회지 Vol.7 No.3
This expriment was carried out on culture media which affect growth, development and physiological effect to Pleurotus ostreatus , when aqueous ferrum, red pepper powder, leaves of ginkgo biloba were added to culture media. The yield of fresh mushroom per 850ml PP bottle in chunchu-neutari was highest by 144g in 34.9g aqueous ferrum added, ferrous content don’t affected to yield of mushroom, but variety of Pleurotus ostreatus affect to yield. Mineral content of fruit body and culture media in Suhan-neutari was different to mineral kind, ferrous content of furit body was similar to 0.31~0.43mg/kg when ferrous content of media was increased in 0.89mg/kg to 10.8mg/kg. The more content of red pepper powder in culture media was high, the more capsaicin content in fruit body was high. transferred capsaicin was highest by 6 mg/100g in Suhan-neutari. Total phenolics content were higher in culture media which was added aqueous ferrum and red pepper powder, but correlation don’t showed total phenolics content among antioxydant activity, reducing power, chelating capacity. Macrophage activation was higher in Suhan-neutari than other Pleurotus spp.
IPO 전후 R&D지출 및 배당성향과 차등의결권의 타당성에 관한 연구
박재성,김동열,유윤정 단국대학교 미래산업연구소 2024 산업연구 Vol.48 No.1
본 연구는 IPO 전후 기업 경영 변화를 매출액대비연구개발비 비중과 배당성향 두 지표로 관찰하며, 이러한 변화가 창업자의 지배권 보장을 위한 차등의결권 주식 발행의 필요성을 입증하는지 검토한다. 이 두 지표는 장단기 목적의 현금흐름 사용을 대표하는 지표로서, 현금흐름의 처분에 대한 주주의 압력을 간접적으로 측정한다. 두 지표가 IPO를 전후하여 크게 차이를 보이며, 기업의 장기적 성과보다 단기적 이익을 중시하는 방향으로 나타난다면 장기적 기업 가치 제고를 위해 차등의결권의 유용성을 제기할 수 있으나, 반대의 경우에는 차등의결권 도입의 실증적 근거가 미약하다고 할 수 있다. 본 논문의 분석 결과는 다음과 같다. 첫째, 2000년부터 2016년까지 유가증권시장과 코스닥시장, 코넥스시장에 상장한 기업 중 IPO 전후 3년 간, 즉 t-3년 ~ t+3년에 연구개발비비중을 공시한 189개 기업과 배당성향을 공시한 13개 기업을 조사한 결과, 매출액대비연구개발비 비중이 IPO 이후 반드시 감소하였다고 판단할 수 없었다. 둘째, 배당성향은 비록 통계적 유의성은 작으나, IPO 이후 수준보다는 IPO 이전 수준이 더 높았다. 이 같은 결과는 IPO 이후 기업의 현금흐름이 장기적 기업 가치 제고에 부정적인 영향을 미칠 것이라는 주장에 대한 명확한 증거를 제시하지 못함으로써, 단기적 주주 이익 극대화를 방지하기 위해 차등의결권이 필요하다는 주장의 근거가 불분명함을 시사한다. We examine pre- and post-IPO changes in R&D expenditures as a percentage of sales and dividend payout ratio to determine whether these changes support the need for dual-class shares to preserve founders' control. These indicators measure shareholder pressure on cash flow disposition. Significant post-IPO differences may suggest the usefulness of dual-class shares for long-term value, while the opposite weakens the case for their adoption. We analyzed 189 firms that disclosed R&D expenditure ratio and 13 firms that disclosed dividend payout ratio, among all listed firms on KOSPI, KOSDAQ, and KONEX from 2000 to 2016. We found that R&D expenditure ratio did not necessarily decrease post-IPO, and dividend payout ratio was rather higher pre-IPO, albeit with small statistical significance. These results do not clearly support the claim that dual-class shares are necessary to prevent short-term shareholder profit maximization.
운동프로그램이 발달장애아동의 인지기능 발달에 미치는 영향
박재성,김도호 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.6
The purpose of this study was to examine the effect of motor exercise program on the cognitive of children with developmental disabilities. The subjects in this study were six selected children who were attending special school in the city of Busan. To gauge the level of improvement in their cognitive competence, KEN-MSC was put to use. To find out any change of their cognitive competence, motor exercise program executed to children two times a week, and forty minutes a day over twenty weeks. Before applied this program, measured the cognitive competence for each group, and after twenty weeks by same method like before, and the results of the comparisons were as follows ; 1. The experimental group was improved missing search among cognitive competence. 2. The experimental group was improved order assembly among cognitive competence. 3. The experimental group was improved block design among cognitive competence. 4. The experimental group was improved object assembly among cognitive competence. 5. The experimental group was improved sign writing among cognitive competence. 6. The experimental group was improved labyrinth among cognitive competence.