PER, PBR, Firm Size 기준에 의한 스타일별 포트폴리오 투자성과 비교연구

This journal revised whether the excess earnings could be gained when managed through fundamental analysis by stock. Stocks listed on the Korean Securities Exchange market at the end of July, 2001 were grouped into 8 portfolios according to its PER, PBR and market cap and its earnings from the beginning of 1991 to 2001 June was calculated. Among various methods, investment returns were calculated by the Buy-and Hold Return after investment that turned out to be meaningful by recent research result. This method calculates excess earnings gained after investing same amount in each n stocks at the time of purchase and holding the portfolio without any transaction since then. Therefore return could be higher than other portfolios as long as the investment strategy is useful. After analyzing the actual proof, it could be known that the portfolio composed of small-cap stocks with low PER and PBR made relatively stable earnings vs portfolios with other kinds. Moreover, portfolio management according to certain style could entail excess return without taking additional risk.논문개요 제1장 서론 = 4 제2장 기본적 변수에 대한 이론적 배경 및 관련연구 = 9 1. 주가이익배율(PER) = 9 2. 주가순자산배율(PBR) = 17 3. 기업규모효과 = 21 제3장 실증분석 = 29 1. 연구방법 = 29 2. 실증분석 및 연구결과의 해석 = 35 제4장 결론 = 46 참고문현 = 4

New DNA methylase from marine microorganism and methods of preparation thereof

본 발명은 해양 미생물 알파프로박테리아 균주 IMCC12053로부터 분리된 신규의 외향고리 DNA 아미노 그룹 메틸라아제 및 이의 제조방법에 관한 것으로서, 해양 미생물에서 동정된 DNA 메틸라아제 및 이를 암호화하 는 DNA 메틸라아제 유전자를 제공한다. 유전자를 발현재조합 벡터에 클로닝하고 형질전환된 세포에서 발현 하여 DNA 메틸라아제를 대량 생산 및 분리하는 방법을 제공하고 있다. 본 발명의 신규 DNA 메틸트랜스퍼라 아제는 제한효소 자리 보호하고 DNA의 물리적 물성 변화를 유도하여 제한효소 인식 서열을 감소시킴으로 써 효소 특이성을 증가시키는 효과를 제공한다

Microbial Diversity in the Onnuri Vent field of Mid Indian Ocean Ridge and Their Identification

Through 2018 Indian Ocean hydrothermal vent exploration, we obtained samples from the previously known as hydrothermal vent areas, Edmond and Solitaire, and from the newly discovered OVF (Onnuri Vent Field) site. Microbial diversity near suspected hydrothermal vent area had been analyzed from above sites through the amplicon sequencing approach. The communities found in Edmond site were dominated by Thermodesulfovibrio and Campylonacterales order. In Solitaire site, Thiotricales and Campylonacterales order were abundant. The newly discovered OVF area showed high proportion of Chromatiales and Actinomarinales order. In addition, enrichment cultures for isolation of chemolithoautotrophs and hyperthermophiles under mesophilic, thermophilic and hyperthermophilic condition has been progress. We have isolated sulfur-oxidizing, autotrophic microorganisms, Sulfurimonas and Sulfurovum species. Also, we have obtained 5 strains belonging to the hyperthermophilic archaeon, Thermococcus genus. Currently, we are analyzing the physiological characteristics of the obtained strains.1

비광합성 해양·극한 미생물의 탄소 대사과정 규명 및 활용 최종보고서

한국해양과학기술