본 연구에서는 건강기능성 식품원료로서 이용 빈도가 증가하고 있는 하수오, 백수오 및 이엽우피소에 대한 종 특이 프라이머를 개발하였다. 개발된 종 특이 프라이머는 하수오, 백수오 및 이엽우피소에 대해 원물뿐만 아니라 육안 확인이 어려운 가공식품 등을 대상으로 사용원료의 진위여부를 빠르고 정확하게 확인할 수 있었다. 따라서 본연구에서 개발한 종 특이 PCR방법은 기존의 일반 프라이머를 사용하는 방법이 가지고 있는 식품 적용 한계를 극복할 수 있을 것이라고 판단하였다.

Microstructural analysis of a (α+β) Ti alloy was investigated to consider phase transformation in each step of thethermo-mechanical process using by SEM and TEM EDS. The TAF (Ti-6Al-4Fe) alloy was thermo-mechanically treated withsolid solution at 880oC, rolling at 880oC and annealing at 800oC. In the STQ state, the TAF microstructure was composedof a normal hcp α and metastable β phase. In a rolled state, it was composed of fine B2 precipitates in an α phase, whichhad high Fe segregation and a coherent relationship with the β matrix. Finally, in the annealing state, the fine B2 precipitateshad disappeared in the α phase and had gone to the boundary of the α and β phase. On the other hand, in a lower rollingtemperature of 704oC, the B2 precipitates were more coarse in both the α and the boundary of α and β phase. We concludedthat microstructural change affects the mechanical properties of formability including rolling defects and cracks.

Metastable phase characteristics of beta Ti alloys were investigated to consider the relationship of the microstructureand diffraction pattern in TEM. TEM analysis showed that the microstructure was mottled as a modulated structure, and thediffraction pattern was composed of spot streaks between the main spots of a stable beta phase with a specific latticerelationship. The modulated structure may be induced by short distance slip or atom movement during a very short intervalof solution treated and quenched (STQ) materials. The athermal ω phase, which could be precipitated at low temperature aging,is also analysed by the metastable phase. The metastable phases including athermal ω phase had a common characteristic ofhardened and brittle behavior because the dislocation slip was restricted by a super lattice effect due to short distance atommovement at the metastable state.

충청남도 서부에 분포하는 아미산층에서 많은 패갑류 화석이 채집되었다. 이들 화석은 아미산층의 여러 층준에서 밀집된 상태로 산출되며, 아열대 기후의 담수 환경에서 번성한 것으로 추정된다. 아미산층산 패갑류 화석은 다음과 같이 3속 4종으로 분류되었다: Euestheria kawasakii, E. shimamurai, Sphaerestheria koreanica, 그리고 Cyclestherioides rampoensis. 그중에서 후자는 이전에 아미산층에서 기록된 종이고, 나머지 3종은 새로이 발견된 종이다. 패갑류 화석에 의한 아미산층의 지질 시대는 후기 트라이아스기로 추정된다.

Since the commercial operation of Kori Unit #1 nuclear power plant(NPP) started in 1978, 23 units at present are operating in Korea. Radioactive wastes will be steadily generated from these units and accumulated. In addition, the life-extension of NPPs, construction of new NPPs and decontamination and decommissioning research facilities will cause radioactive wastes to increase. Recently, Korea has revised the new classification criteria as was proposed by IAEA. According to the revised classification criteria, low-level, very-low-level and exempt waste are estimated to about 98% of total disposal amount. In this paper, current status of overseas cases and disposal method with new classification criteria are analyzed to propose the most reasonable method for estimating the amount of decommissioning waste when applying the new criteria.

The book of ‘World Museum of National History’ includes an analysis of the origin of natural history and howthe natural museums function and play a role. The book also describes details of the current situation of the naturalhistory museums around the world. It is expected that the book helps advance and spread ‘the scientific culture’ as wellas it assists to increase the awareness of the importance of science among the general public. the natural museums function and play a role. The book also describes details of the current situation of the natural history museums around the world. It is expected that the book helps advance and spread ‘the scientific culture’ as well as it assists to increase the awareness of the importance of science among the general public.

현대 목조 구조물은 일반적으로 접합철물인 연결재를 이용하여 접합된다. 그리고 목조 구조물에서 다수의 연결재를 사용한 접합부는 반강접 접합부를 만든다. 목조 구조물에 접합부가 핀접합으로 설계될 경우에 접합부를 통해 전달되는 하중이 과소 평가되고 이것은 접합부의 저항능력 부족을 초래한다. 목조 구조물의 접합부를 완전 강접합으로 고려할 경우에 접합에 필요한 접합철물의 양이 과도하게 증가 할 수 있다. 이것은 미적인 요소 뿐만 아니라 시공성과 경제성을 저하시킨다. 접합부의 합리적인 강성에 대한 추정은 목조 구조물의 합리적인 접합부의 설계에 필수적인 요소이다. 이 논문은 목조 구조물의 구조설계를 쉽게 수행할 수 있도록 도움을 주기 위하여 2면 전단접합에 대하여 구조설계에서 널리 이용되는 상용 프로그램을 사용하여 접합부의 근사적인 강성을 나타낼 수 있는 해석 모델링 기법을 제안한다. 제안된 근사해석 모델링 기법은 휨 모멘트, 인장에 대한 실험 결과와 해석결과를 비교하여 접합부의 거동을 나타낼 수 있다는 것을 확인하였다.

In order to deduce an objective evaluation method of motion seasickness incidence (MSI) by ship motions during underway in irregular waves and to present the fundamental data of passenger comfort on the yacht and the passenger ship according to the result, the MSI of the trainees by the questionnaires was analysed and compared with the rate of variation of salivary a -amylase activity (VSAA) on the training ship "A-ra ho" of Jeju national university. Relationship between rate of variation (x) by salivary a -amylase activity and motion seasickness incidence (y) was described by the equation, MSI(%) = 0.6073 x + 12.189 including the correlation coefficient (R 2 = 0.9853). The result obtained through the rate of variation of salivary a -amylase activity which was the quantitative evaluation method for ship motions causing seasickness was most affected by z-vertical acceleration and occurred within the frequency range 0.1 to 0.3Hz centered on 0.2Hz, and the simulation result based on this finding showed the motion seasickness rate at approximately 4% lower than the rate obtained through the survey.

한반도에서 산출되는 화석목재의 개요와 고식물학적 의미를 파악하기 위하여 문헌 조사를 통하여 이들을 종합하였다. 한반도에서 보고된 화석목재는 중생대에서 신생대로 갈수록 종수와 다양성이 증가하며 특히 신생대에 급증했다. 전기 중생대에서는 구과류 4속 6분류군이 기재되었는데 이것은 대동식물군의 약 6%에 해당한다. 후기 중생대의 화석목재는 모두 구과류이며 총 7속 15분류군이 기재되었는데, 이것은 낙동식물군의 약 29%에 해당한다. 신제3기의 화석목재는 16과 21속에 속하는 35분류군이 기재되었는데 대부분이 쌍자엽식물이고 다른 시대에 비하여 다양성이 가장 크다. 이것은 장기식물군의 약 83%에 해당한다. 신제3기에 화석목재가 급증한 이유는 식물군의 구성이 쌍자엽식물이 많고, 화석층에 목재 화석화에 적합한 화산쇄설암이 풍부했기 때문인 것으로 생각된다.

This study suggested comprehensive structural characterization methods for the commercial blue light emitting diodes(LEDs). By using the Z-contrast intensity profile of Cs-corrected high-angle annular dark field scanning transmission electron microscope(HAADF-STEM) images from a commercial lateral GaN-based blue light emitting diode, we obtained important structural information on the epilayer structure of the LED, which would have beendifficult to obtain by conventional analysis. This method was simple but very powerful to obtain structural and chemical information on epi-structures in a nanometer-scale resolution. One of the examples was that we could determine whether the barrier in the multi-quantum well(MQW) was GaN or InGaN. Plan-view TEM observations were performed from the commercial blue LED to characterize the threading dislocations(TDs) and the related V-pit defects. Each TD observed in the region with the total LED epilayer structure including the MQW showed V-pit defects for almost of TDs independent of the TD types: edge-, screw-, mixed TDs. The total TD density from the region with the total LED epilayer structure including the MQW was about 3.6 × 108 cm−2 with a relative ratio of Edge- : Screw- :Mixed-TD portion as 80%: 7%: 13%. However, in the mesa etched region without the MQW total TD density was about 2.5 × 108 cm−2 with a relative ratio of Edge- : Screw- :Mixed TD portion of 86%: 5%: 9 %. The higher TD density in the total LED epilayer structure implied new generation of TDs mostly from the MQW region.

In this study, we investigated the macrobenthic community structure and spatiotemporal variations in Uljin Marine Ranching area, East Sea of Korea. Macrobenthos were collected using a modified van Veen grab sampler from April to September 2013. Total number of species sampled was 345 and mean density was 5,797 ind. m-2, both of which were dominated by the polychaetes. The most dominant species were Spiophanes bombyx (53.64%), followed by Magelona sp.1 (6.96%), Cadella semitorta (2.73%), Lumbrineris longifolia (2.16%) and Alvenius ojianus (2.08%). Cluster analysis and nMDS ordination analysis based on the Bray-Curtis similarity identified 2 station groups. The group 1 (station 2, 3, 5, 6, 8 and 9) was characterized by high abundance of the polychaetes Magelona sp.1, Lumbrineris longifolia, Scoloplos armiger, Praxillella affinis, Maldane cristata and the bivalve Alvenius ojianus, with fine sediment above 30m water depth. On the other hand, the group 2 (station 1, 4, 7 and 10) was numerically dominated by the polychaete Lumbrineriopsis sp. and the bivalve Cadella semitorta, with coarse sediment below 5m water depth. Collectively, the macrobenthic community structure showed a distinct spatial trend, which seemed to be related to the water depth and sediment composition.