Ferroelectric raman spectra of KDP

학위논문(석사) - 한국과학기술원 : 물리학과, 1978.2, [ [ii], [66] p. ]$A_r - K_r$ ion laser를 사용해서 상온에서와 액체질소 온도에서의 KDP 결정과 KDP 포화용액에 대한 Raman 산란실험을 하였다. 이 실험에서 0∼300$cm^{-1}$ 사이의 Raman Peak는 $K^+$ 와 $(H_2PO_4)^-$ 사이의 lattice vibration 이, 300∼1100$cm^{-1}$ 사이에서는 $PO_4$ 내에서의 internal vibration이 주가 됨을 알수있었다. 또한 group theory 에서 예측되는 E mode splitting과 normal mode compatibility relation 도 확인되었다. $B_2$ ferroelective mode 의 overdamping 과 0∼100$cm^{-1}$ 사이의 E mode Rayleigh shoulder 가 이 액체질소 온도에서 사라짐을 볼 수 있었다. crystallographic unit cell symmetry와 translational primitive cell symmetry 로 KDP 의 lattice vibration 을 group theory 를 써서 비교 하였다.한국과학기술원 : 물리학과

Dinoflagellate cyst production and flux in Gamak Bay: A sediment trap study

To develop a better understanding of the species composition and production of dinoflagellate cysts, including the ecological characteristics of Polykrikos species, a sediment trap study was conducted from June 2005 to June 2006 in Gamak Bay, Korea. Thirty-two dinoflagellate cyst taxa were identified in the sediment trap samples, and the dinoflagellate cyst assemblages were found to be dominated by cysts of Polykrikos kofoidii, Scrippsiella trochoidea, Protoperidinium spp., Polykrikos schwartzii, Gymnodinium catenatum and Ensiculifera carinata. The flux of dinoflagellate cysts ranged from 0.10 × 105 to 35.97 × 105 cysts m-2 day-1, and the highest flux occurred during summer, and was driven completely by the flux in the production of P. kofoidii and P. schwartzii cysts. The timing of the production of cysts of Polykrikos species seemed to be related to the appearance of G. catenatum as prey. The assemblages of dinoflagellate cysts in surface sediments from Gamak Bay, and their seasonal changes, were very similar to those in the sediment trap samples, which suggested that the monitoring of dinoflagellate cysts in sediment samples can provide information on the environmental conditions in Gamak Bay.k Bay, Korea. Thirty-two dinoflagellate cyst taxa were identified in the sediment trap samples, and the dinoflagellate cyst assemblages were found to be dominated by cysts of Polykrikos kofoidii, Scrippsiella trochoidea, Protoperidinium spp., Polykrikos schwartzii, Gymnodinium catenatum and Ensiculifera carinata. The flux of dinoflagellate cysts ranged from 0.10 × 105 to 35.97 × 105 cysts m-2 day-1, and the highest flux occurred during summer, and was driven completely by the flux in the production of P. kofoidii and P. schwartzii cysts. The timing of the production of cysts of Polykrikos species seemed to be related to the appearance of G. catenatum as prey. The assemblages of dinoflagellate cysts in surface sediments from Gamak B1

The ecological information of dinoflagellate cysts: A sediment trap study

To develop a better understanding of the species composition and production of dinoflagellate cysts, including the ecological characteristics of Polykrikos species, a sediment trap study was conducted from June 2005 to June 2006 in Gamak Bay, Korea. Thirty-two dinoflagellate cyst taxa were identified in the sediment trap samples, and the dinoflagellate cyst assemblages were found to be dominated by cysts of Polykrikos kofoidii, Scrippsiella trochoidea, Brigantedinium spp., P. schwartzii, Gymnodinium catenatum and Ensiculifera carinata. The flux of dinoflagellate cysts ranged from 0.10× 105 to 35.97× 105 cysts m-2 day-1, and the highest flux occurred during summer, and was driven completely by the flux in the production of Polykrikos kofoidii and P. schwartzii cysts. The growth and timing of the production of cysts of Polykrikos species seemed to be related to the appearance of G.catenatum and S. trochoidea as prey. The assemblages of dinoflagellate cysts in surface sediments from Gamak Bay, and their seasonal changes, were very similar to those in the sediment trap samples, which suggested that the monitoring of dinoflagellate cysts in sediment samples can provide information on the environmental conditions in Gamak Bay.k Bay, Korea. Thirty-two dinoflagellate cyst taxa were identified in the sediment trap samples, and the dinoflagellate cyst assemblages were found to be dominated by cysts of Polykrikos kofoidii, Scrippsiella trochoidea, Brigantedinium spp., P. schwartzii, Gymnodinium catenatum and Ensiculifera carinata. The flux of dinoflagellate cysts ranged from 0.10× 105 to 35.97× 105 cysts m-2 day-1, and the highest flux occurred during summer, and was driven completely by the flux in the production of Polykrikos kofoidii and P. schwartzii cysts. The growth and timing of the production of cysts of Polykrikos species seemed to be related to the appearance of G.catenatum and S. trochoidea as prey. The assemblages of2