이 연구는 한국의 유가증권시장과 코스닥시장의 비금융업종 기업을 대상으로 기업의 비대칭적 환노출과 기업의 주가급락위험 간의 관계를 분석하였다. 분석 기간은 2009년부터 2021년까지이다. 분석 결과 환율이 상승하는 경우 주가가 크게 하락하는 특성의 비대칭적 환노출이 있는 기업의 경우 주가급락위험이 감소하는 결과를 확인하 였다. 이러한 결과는 환율이 상승하는 경우 기업의 주가가 하락하는 정도가, 환율이 하락하는 경우 주가가 상승 하는 정도보다 큰 것으로 시장에서 확인되어 있는 경우 경영자는 환율 상승과 주가 하락에 관련된 정보를 은닉하기 보다는 환노출을 관리하는 선택을 하게 되고, 시장에서도 이러한 기업들의 환율변동과 주가 간의 관계에 관심을 갖게 되어 환율변동의 영향이 신속하게 주가에 반영되기 때문에 주가급락위험이 오히려 감소하는, 비대칭적 환노출 의 주가급락위험 감소 효과가 나타나기 때문인 것으로 판단된다. 그러나 평균적인 관계와는 달리 비대칭 환노출이 있는 기업의 경우 환율 상승에 따른 주가급락위험 증가의 가능성이 있음도 확인할 수 있었다. 이 연구의 분석 결과 는 환노출이 있는 기업의 경우 환노출과 관련된 정보를 시장에 충분히 공지하는 것이 주가급락위험 예방의 차원 에서 중요할 수 있음을 확인시켜 준다.

To address the pressing societal concern in Korea, characterized by the imminent saturation of spent nuclear fuel storage, this study was undertaken to validate the fundamental reprocessing process capable of substantially mitigating the accumulation of spent nuclear fuel. Reprocessing is divided into dry processing (pyro-processing) and wet reprocessing (PUREX). Within this context, the primary focus of this research is to elucidate the foundational principles of PUREX (Plutonium Uranium Redox Extraction). Specifically, the central objective is to elucidate the interaction between uranium (U) and plutonium (Pu) utilizing an organic phase consisting of tributyl phosphate (TBP) and dodecane. The objective was to comprehensively understand the role of HNO3 in the PUREX (Plutonium Uranium Redox Extraction) process by subjecting organic phases mixed with TBPdodecane to various HNO3 concentrations (0.1 M, 1.0 M, 5.0 M). Subsequently, the introduction of Strontium (Sr-85) and Europium (Eu-152) stock solutions was carried out to simulate the presence of fission products typically contented in the spent nuclear fuel. When the operation proceeds, the complex structure takes the following form. 􀜷􀜱􀬶 􀬶􀬾(􀜽􀝍) + 2􀜰􀜱􀬷 􀬿(􀜽􀝍) + 2􀜶􀜤􀜲(􀝋􀝎􀝃) ↔ 􀜷􀜱􀬶(􀜰􀜱􀬷)􀬶 ∙ 2􀜶􀜤􀜲(􀝋􀝎􀝃) Subsequently, separate samples were gathered from both the organic and aqueous phases for the quantification of gamma-rays and alpha particles. Alpha particle measurements were conducted utilizing the Liquid Scintillation Counter (LSC) system, while gamma-ray measurements were carried out using the High-Purity Germanium Detector (HPGe). The distribution ratio for U, Eu (Eu-152), and Sr (Sr-84) was ascertained by quantifying their activity through LSC and HPGe. Through the experiments conducted within this program, we have gained a comprehensive understanding of the selective solvent extraction of actinides. Specifically, uranium has been effectively separated from the aqueous phase into the organic phase using a combination of tributyl phosphate (TBP) and dodecane. Subsequently, samples containing U(VI), Eu(III), and Sr(II) underwent thorough analysis utilizing LSC and HPGe detectors. Our radiation measurements have firmly established that the concentration of nitric acid enhances the selective separation of uranium within the process.

As a promising anode for sodium-ion batteries (SIBs), cobalt sulfide ( CoS2) has attracted extensive attention due to its high theoretical capacity, easy preparation, and superior electrochemical activity. However, its intrinsic low conductivity and large volume expansion result in poor cycling ability. Herein, nitrogen-doped carbon-coated CoS2 nanoparticles (N–C@ CoS2) were prepared by a C3N4 soft-template-assisted method. Carbon coating improves the conductivity and prevents the aggregation of CoS2 nanoparticles. In addition, the C3N4 template provides a porous graphene-like structure as a conductive framework, affording a fast and constant transport path for electrons and void space for buffering the volume change of CoS2 nanoparticles. Benefitting from the superiorities, the Na-storage properties of the N–C@CoS2 electrode are remarkably boosted. The advanced anode delivers a long-term capacity of 376.27 mAh g− 1 at 0.1 A g− 1 after 500 cycles. This method can also apply to preparing other metal sulfide materials for SIBs and provides the relevant experimental basis for the further development of energy storage materials.

As the demand for flexible wearable electronic devices increases, the development of light, thin and flexible high-performance energy-storage devices to power them is a research priority. This review highlights the latest research advances in flexible wearable supercapacitors, covering functional classifications such as stretchability, permeability, self-healing and shapememory capabilities, as well as practical studies on energy harvesting capabilities.

Rotylenchus pini Mamiya, 1968 was reported from rhizospheric soils of Zoysia japonica in Korea. Females and males of the characterized population conform to the original species description from Japan and also to other subsequent species descriptions with variations in a few details in morphometrics including the existence of pharyngeal gland overlap in some specimen. Bayesian analysis of all the three DNA markers consistently grouped R. pini together with Rotylenchus species including R. zhongshanensis, a morphologically close species. Additionally, the newly obtained sequences of R. pini were found to be almost identical to the sequences assigned to Rotylenchus aff. devonensis in GenBank. These Rotylenchus aff. devonensis isolates might be representatives of R. pini populations. The current and previous phylogenetic studies supported by the recorded morphological plasticity within populations of the genus validate the proposed synonymy of Pararotylenchus with Rotylenchus.

Bacillus thuringiensis (Bt) is currently the most commonly used microbial pesticide. In the previous study, Bt IMBL-B9 known for its high toxicity against Spodoptera exigua, S. frugiperda and Plutella xylostella was characterized. To develop novel biopesticide, optimization of culture medium is required for the cost-effective mass production for toxin production of IMBL-B9. Through experimental design by Plackett-Burman design, ingredients that significantly influenced the production of IMBL-B9's toxin were selected. Using these results, the novel culture medium for IMBL-B9 was developed and the toxin yield of IMBL-B9 was significantly increased than conventional media by using this medium. These results could be useful for the development of biopesticides.

The beet armyworm, Spodoptera exigua, is one of the worldwide distributed agricultural pest insects and has been known to show high resistance to conventional chemical insecticides. Since it has been reported that secondary metabolites from actinomycetes show insecticidal activities against various insect pests, actinomycetes could be a potential source of insecticidal compounds. In this study, culture extracts of Streptomyces strains were tested for their insecticidal activity against Spodoptera exigua. Among them, culture extracts of IMBL-0003 strain which was identified as Streptomyces celluloflavus showed a high insecticidal activity (more than 90% mortality). These results suggested that secondary metabolites of this isolate could have potentials to be a efficient eco-friendly pesticide for controling Spodoptera exigua.

한국임업진흥원은 2012년 1월 설립된 산림청 산하의 공공기관으로서 산림과학기술의 보급과 임업 및 임산업 의 고부가가치 창출을 위한 임업 서비스를 제공하고 있으며, 국내 산림분야 활성화 및 글로벌 경쟁력 확보에 기여하고 있다. 특히, 소나무재선충병으로부터 국가 산림자원 보호를 위해 소나무재선충병모니터링센터를 2016년 1월에 설치하였으며, 최근 산림병해충이 산림을 비롯하여 생활권, 농림지 등에 돌발대발생하여 국민생 활에 불편을 초래하고 재산피해를 야기함에 따라 2021년 1월에 산림병해충모니터링센터로 확대 개편하여 산림 병해충 피해 예방과 감소를 위한 다양한 역할을 수행하고 있다. 주요 역할로는 주요돌발외래 산림병해충의 예찰 및 발생피해현황 모니터링, 방제약제 등록시험 운영 및 방제품질 관리, 예찰방제 전문가 양성 교육, 대국민 홍보 등이 있으며 본 발표를 통해 현재까지 산림병해충 관리를 위한 수행 내용과 결과를 공유하고자 한다.