In vitro development of parthenogenetic embryo was examined after ethanol treatment of follicular oocytes matured in vitro for 42, 48, 54 and 60h in the pig. The follicular oocytes were matured in TCM 199 containing 15% FCS and gonadotrophins in an atmosphere of 39 5% . The cumulus-free oocytes were activated by 10% ethanol treatment in M2+4mg /ml BSA for 10 min. The ethanol-activated oocytes were washed and further cultured in TCM199+20%FCS containing granulosa cell monolayer. Maturation rates at 42, 48, 54 and 60h of IVM were 75.0, 86.5, 81.6 and 87.9%, respectively. Thus the oocytes maturated in vitro for longer periods did not improve nuclear maturation much. Pronuclear formation rates at 18h post-activation in ethanol-activated oocytes were 21.9, 25.0, 47.4 and 32.6%. The cytoplasmic maturation leading to pronuclear formation upon activation increased when the I VM period was extended from 42 to 54h. When the activated oocytes were cultured for 96~120h to analyse early development of the activated oocytes, the rates of embryonic development upto 5~8 cell were 5.3, 5.8, 12.0 and 11.7% among the cultured embryos. The result indicate that earlier development of activated porcine occyte is dependent on the duration of oocyte maturation, and that better development could be obtained from the oocyte matured for 54h.

N-(p-Coumaroyl)serotonin과 N-Feruloylserotonin은 홍화씨에서 유래하는 특이적인 세로토닌유도체로 주로 식물이 병원균을 방어하기 위해서 만들어내는 hydroxycinnamic acid amides계 물질이다. 본 연구에서는 N-(p-Coumaroyl) serotonin과 N-Feruloylserotonin이 지방전구세포의 지방분화에 미치는 영향을 oil-red O염색과 triglyceride 양 측정, GPDH 활성 측정 등을 통해 알아보았고, 그 결과 두 물질 모두 유의적으로 지방세포분화를 억제함을 관찰하였다. 효능 비교물질로 세로토닌을 처리했을 때 세로토닌 자체로는 지방분화에 유의미한 효과는 관찰되지 않았다. N-(p-Coumaroyl) serotonin과 N-Feruloylserotonin은 또한 우수한 항산화능을 보여주었다. 이러한 결과를 통해, N-(p-Coumaroyl)serotonin과 N-Feruloylserotonin이 지방세포분화억제를 통한 항비만 소재로서의 가능성을 확인하였다.

A Lagrangian dispersion model has been developed to study the transport of atmospheric pollutants over the southern Korean peninsula on sunny summer days. A mesoscale atmospheric model has been employed to provide the wind fields and information for turbulent diffusion for the calculation of trajectories using a conditioned particle technique. The model has been applied to the simulation of trajectories transport of atmospheric pollutants emitted from five sources in the coastal locations under various synoptic scale winds. Under calm synoptic scale condition, the particles emitted during daytime are mixed vertically and transported toward inland by sea-breeze, according to the model simulation. The particles are then transported upward at the sea-breeze front or by the upward motion over the mountain, and some particles show tendency of returning toward the coast by the return flow of the sea-breeze circulation. The particles are found to remain over the peninsula throughout the integration period under calm synoptic scale condition. When there is westerly synoptic scale wind, the particles emitted in the west coast can reach the east coast within a day or faster depending on the speed. With a synoptic scale southerly wind of 5 m/s, most of the particles from the five sources are advected toward inland during daytime. During nighttime, significant portion of particles released in the west coast remains over the land, while most particles released in the east coast move toward the sea to the east of the middle peninsula.