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采用生化测定的方法,对锯缘青蟹(Scyllaserrata)鳃、肝胰腺和肌肉等不同器官组织中活性氧(ROS)与抗超氧阴离子自由基(ASAFR)含量进行了测定。 结果表明, 不同器官组织中活性氧与抗超氧阴离子自由基含量各异。 各器官组织中活性氧含量由高到低依次为:肝胰腺>肌肉>鳃, 分别为195.04U/mg±33.46U/mg, 64.03 U/mg±12.77 U/mg和44.84U/mg±10.44U/mg。而抗超氧阴离子自由基含量则是鳃>肝胰腺>肌肉,大小分别为439.62 U/g±64.73U/g,297.89 U/g±39.75 U/g和84.24 U/g±18.03 U/g。统计分析显示,锯缘青蟹各器官组织间的活性氧与抗超氧阴离子自由基含量均存在极显著性差异(P<0.01)。这是由于不同器官组织所执行的生理功能不同造成的。 相似文献
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The sea ice community plays an important role in the Arctic marine ecosystem. Because of the predicted environmental changes in the Arctic environment and specifically related to sea ice, the Arctic pack ice biota has received more attention in recent years using modern ice-breaking research vessels. Studies show that the Arctic pack ice contains a diverse biota and besides ice algae, the bacterial and protozoan biomasses can be high. Surprisingly high primary production values were observed in the pack ice of the central Arctic Ocean. Occasionally biomass maximum were discovered in the interior of the ice floes, a habitat that had been ignored in most Arctic studies. Many scientific questions, which deserve special attention, remained unsolved due to logistic limitations and the sea ice characteristics. Little is know about the pack ice community in the central Arctic Ocean. Almost no data exists from the pack ice zone for the winter season. Concerning the abundance of bacteria and protozoa, more studies are needed to understand the microbial network within the ice and its role in material and energy flows. The response of the sea ice biota to global change will impact the entire Arctic marine ecosystem and a long-term monitoring program is needed. The techniques, that are applied to study the sea ice biota and the sea ice ecology, should be improved. 相似文献
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Reduction of hydrocarbon contamination on viability of <Emphasis Type="Italic">Acartia pacifica</Emphasis> benthic resting eggs 总被引：2，自引：0，他引：2
The potential effect of hydrocarbon contamination on the hatching success of benthic resting eggs of Acartia pacifica in Xiamen Bay was investigated experimentally. The number of nauplii emerging from the sediment samples decreased with increasing Fuel Oil #0 concentration. The estimated rate of mortality increased markedly with the increase of Fuel Oil #0 concentration. Successive fuel Oil #0 concentrations from 50 mg/kg to 5000 mg/kg reduced the number of hatched nauplii by 3.8% -100%. The mortality of A. pacifica resting eggs due to Fuel Oil #0 contamination did not significantly increase as time progressed at each concentration level. The LC50 values of resting eggs, changing from 237.12 to 279.59 mg/kg, remained at an almost stable level in two months. The number of A. pacifica nauplii that hatched from the sediment at 10℃ was higher than those from the sediment at 30℃, which indicates that the toxicity of Fuel Oil #0 on A. pacifica resting eggs increases with increasing temperature. 相似文献
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采用兔抗哺乳类抗血清，应用链霉菌抗生物素蛋白-过氧化物酶免疫细胞化学技术，研究了锯缘青蟹（Scylla serrata）胸神经团中5-羟色胺（5-HT）、胰高血糖素（Glu）和神经肽Y（NPY）的分布。其分布的主要特征为：5-HT免疫阳性细胞在每对步足神经节都呈对称排列；GLU免疫阳性最强，胸神经节的阳性细胞排列成两条环境胸动脉孔分布的细胞带，神经髓质中免疫阳性物质呈斑块状分布；NPY阳性细胞主要分布于食道下神经节。这3种免疫阳性物质的特定分布模式可为腹神经链的系统演化和参与神经活动提供形态学证据。 相似文献
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1 INTRODUCTION Lectins have been regarded as having a puta- tive role in non-self recognition in vertebrate and invertebrate immunities (Arason, 1996; Matsushita, 1996; Olafsen, 1996; Vasta et al., 1999; Wilson, et al., 1999; Marques and Barracco, 2000). … 相似文献
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