벗초파리기생벌인 A. japonica의 벗초파리 유충의 발육단계에 따른 기생특성과 기생당한 유충과 번데기에서 형태적인 차이를 조사하였다. 또한 A. japonica의 우화기간이 벗초파리 우화일수 보다 더 소요되는 것을 확인하였다. A. japonica는 벗초파리 유충에 효과적인 기생 및 살충 효과를 나타내었으며 벗초파리 방제를 위한 천적으로 활용이 가능할 것으로 보인다.

Embryonic lethality due to recessive alleles is a major concern in livestock breeding programs. The Online Mendelian Inheritance in Animal (OMIA) is a database of reported recessive mutations in livestock that helps breeders to manage the segregation of these mutations in their population. Recessive alleles are lethal in the offspring of two carrier parents; therefore, identifying and eliminating carrier animals are critical for maintaining the breed. Hanwoo cattle is native to the Korean peninsula and is of great economic importance to Korea. Due to geographical constraints and the controlled breeding program with very few proven bulls, if not monitored periodically, the threat of segregation of recessive lethal alleles in the population remains high. Therefore, identifying potential carriers of lethal recessive alleles is critical in Hanwoo. In this regard, we genotyped 17,325 animals using bovine 50K Illumina SNP chip and also sequenced a further 311 animals which was mapped against the bovine reference genome sequence. We then used the OMIA database to identify reported recessive alleles and calculated the allele frequency of these mutations in the population to determine potential lethal alleles carried by the animals.

국내 관련 연구소 및 대학 등에 소장된 표본과 일부 북한산 표본 등을 대상으로 분류동정한 결과 총 17종이 확인되었다. 이 중 Bombus (Tricornibombus) atripes는 한반도에서 처음 기록하며 B. (Thoracobombus) humilis subbaicalensis Vogt는 남한에서 처음으로 기록한다. 이들을 포함한 한반도산 7 아속 21종에 대한 검색표와 채집기록, 각 종의 기주 개화식물에 대하여 기술하였다.

한국산 빗살방아벌레아과(Melanotinae)의 표본을 동정하고 기록 문헌을 정리한 결과 총 18종이 확인되었다. 그 중 Melanotus속으로는 M.chejuensis sp. nov.와 M. coreanus sp. nov.을 포함하여 11종이 확인되었다. 신종에 대하여 기재하고 각 종들의 성충 및 수컷생식기 사진과 함께 각 속, 종들에 대한 검안표를 작성하여 보고한다.

The superconducting electromagnetic propulsion system has been proposed as one of new alternative propulsion systems. Especially, the helical-type propulsion system has the greatest merit that is able to use the solenoid-type superconducting magnets with high magnetic fields. In this study, calculations of characteristics of the large scale helical-type thruster are carried out on the basis of our experimental results. As a couple of results of calculations, it is found that the thruster efficiency quickly increases with the length of electrode up to about 5 m and then goes up to about 0.9. The thruster efficiency peaks at a certain point (~0.6 m) and then falls as length of pitch increases.

Using a SQUID magnetometer, the diamagnetic susceptibility of NaCl aqueous solution was measured with high accuracy in a magnetic field of up to 6 Tat 25±0.05℃. The NaCl concentrations adopted in this experiment were 0 (water), 7.5, 15, 23, 26.2, 26.6 and 100% (crystal) with the concentration error of ±0.04%. Experimental data was compared with the calculated value of susceptibility derived from dependence of the vapor pressure on NaCl concentration As a result, our measured value was almost in accordance with the calculated value. It was found that the diamagnetic susceptibility shows a decrease of approximately 10% within the saturated concentration (26.2%) and that the susceptibility is one of the effective cause for the concentration dependence in the gas-liquid interface deformation of the NaCl solution.