The sea ice core (1. 6m) and lake ice core (1. 5m) were taken respectively from sea sampling site and Ace Lake near Davis Station, Vestfold Hills, Antarctica in November and October, 1988. The concentrations of amino ...The sea ice core (1. 6m) and lake ice core (1. 5m) were taken respectively from sea sampling site and Ace Lake near Davis Station, Vestfold Hills, Antarctica in November and October, 1988. The concentrations of amino acids in each 10cm of ice cores were determined by High Pressure Liquid Chromatography (HPLC). The results showed that the concentrations of amino acids revealed seasonal variation during the year. The highest concentration of amino acids, which was 30. 92 /μmol/ml, were found in the bottom of sea ice core, and it was approximately 45 μmol/ml in the lake ice core. The lowest concentration was approximately 8. 0μmol/ml which is presented in surface of the sea ice core, but it was 14.0μmol/ml which was found in 60cm section of lake ice core.The seasonal variation process of concentration of amino acids were much similar to that of phytoplankton cells number in sea ice core, and the distribution and seasonal variation rate of individual amino acids were also much similar in each ice core sections. We suggest that the uniform spectrum of amino acids is probably derived from a peptide cell source and those amino acids were not utilized by organism.展开更多
L ethal temperature tolerance was determined for about 8 cm, age 0 Pseudosciaena crocea using both slow heating and rapid transfer protocol. The acclimatization temperature was 28 ℃ with summer season, lethal tempera...L ethal temperature tolerance was determined for about 8 cm, age 0 Pseudosciaena crocea using both slow heating and rapid transfer protocol. The acclimatization temperature was 28 ℃ with summer season, lethal temperature ( LT50 value ) of slow heating protocol ( CTMax ) was 35.0 ℃, and the upper and lower incipient lethal temperatures of rapid transfer protocol were 34.2 ℃ and 17.5 ℃ respectively.展开更多
文摘The sea ice core (1. 6m) and lake ice core (1. 5m) were taken respectively from sea sampling site and Ace Lake near Davis Station, Vestfold Hills, Antarctica in November and October, 1988. The concentrations of amino acids in each 10cm of ice cores were determined by High Pressure Liquid Chromatography (HPLC). The results showed that the concentrations of amino acids revealed seasonal variation during the year. The highest concentration of amino acids, which was 30. 92 /μmol/ml, were found in the bottom of sea ice core, and it was approximately 45 μmol/ml in the lake ice core. The lowest concentration was approximately 8. 0μmol/ml which is presented in surface of the sea ice core, but it was 14.0μmol/ml which was found in 60cm section of lake ice core.The seasonal variation process of concentration of amino acids were much similar to that of phytoplankton cells number in sea ice core, and the distribution and seasonal variation rate of individual amino acids were also much similar in each ice core sections. We suggest that the uniform spectrum of amino acids is probably derived from a peptide cell source and those amino acids were not utilized by organism.
基金supported by the Science and Technology Bureau of Zhejiang Province(No.2003C33064)the Science and Technology Bureau of Ningbo City(No.2003C10002)the Key Laboratory of Marine and Estuarine Fisheries of the Ministry of Agriculture.
文摘L ethal temperature tolerance was determined for about 8 cm, age 0 Pseudosciaena crocea using both slow heating and rapid transfer protocol. The acclimatization temperature was 28 ℃ with summer season, lethal temperature ( LT50 value ) of slow heating protocol ( CTMax ) was 35.0 ℃, and the upper and lower incipient lethal temperatures of rapid transfer protocol were 34.2 ℃ and 17.5 ℃ respectively.
