Photosynthesis and respiration of seagrasses are mainly controlled by water temperature. In this study, the photosynthetic physiology and respiratory changes of the Asian surfgrass Phyllospadix japonicus, which is mainly distributed on the eastern and southern coasts of Korea, were investigated in response to changing water temperature (5, 10, 15, 20, 25, and 30°C) by conducting mesocosm experiments. Photosynthetic parameters (maximum photosynthetic rate, Pmax; compensation irradiance, Ic; and saturation irradiance, Ik) and respiration rate of surfgrass increased with rising water temperature, whereas photosynthetic efficiency (α) was fairly constant among the water temperature conditions. The Pmax and Ik dramatically decreased under the highest water temperature condition (30°C), whereas the Ic and respiration rate increased continuously with the increasing water temperature. Ratios of maximum photosynthetic rates to respiration rates (Pmax : R ) were highest at 5°C and declined markedly at higher temperatures with the lowest ratio at 30°C. The minimum requirement of Hsat (the daily period of irradiancesaturated photosynthesis) of P. japonicus was 2.5 hours at 5°C and 10.6 hours at 30°C for the positive carbon balance. Because longer Hsat was required for the positive carbon balance of P. japonicus under the increased water temperature, the rising water temperature should have negatively affected the growth, distribution, and survival of P. japonicus on the coast of Korea. Since the temperature in the temperate coastal waters is rising gradually due to global warming, the results of this study could provide insights into surfgrass responses to future severe sea warming and light attenuation.

이 연구에서 우리는 두피 자극을 완화시킬 수 있는 두피보호파우더를 개발하였으며 이 파우더를 염모제와 혼합하여 사용함으로써 디아민계 염료에 의한 자극이 감소됨을 임상시험을 통하여 확인하였다. 또한 염색력이 향상되고, 두피의 자극과 모발 손상의 완화 효과를 기대할 수 있었다. 이와 함께 본 연구에서의 염모제형은 액정 구조를 가짐으로써 염색력 증진과 암모니아 취 감소 효과를 나타냈다.