Ecological effects of a major oil spill on panamanian coastal marine communities

In 1986 more than 8 million liters of crude oil spilled into a complex region of mangroves, seagrasses, and coral reefs just east of the Caribbean entrance to the Panama Canal. This was the largest recorded spill into coastal habitats in the tropical Americas. Many population of plants and animals in both oiled and unoiled sites had been studied previously, thereby providing an unprecedented measure of ecological variation before the spill. Documenation of the spread of oil and its biological begun immediately. Intertidal mangroves, algae, and associated invertebrates were covered by oil and died soon after. More surprisingly, there was also extensive mortality of shallow subtidal reef corals and infauna of seagrass beds. After 1.5 years only some organisms in areas exposed to the open sea have recovered.     

非洲爪蟾卵子发生过程中凝集素(Lectin)分布的免疫组化研究

本文简述了动物内源性凝集素的研究概况和进行凝集素免疫组化研究的基本方法,并报道了对非洲爪蟾卵子发生过程中凝集素分布情况的下列初步研究结果:各发育阶段爪蟾卵母细胞膜都含有凝集素;皮质颗粒是爪蟾卵母细胞质内唯一含有凝集素的结构;皮质颗粒虽然于卵母细胞发育第Ⅱ阶段开始产生,但只是到笫Ⅲ阶段时才含有大量的凝集素——进行免疫荧光染色时,发亮绿色荧光。