点带石斑鱼的亲鱼培育、产卵受精和胚胎发育

在水泥池人工养殖条件下,对人工诱导性逆转的“功能性雄性”、天然雄性及天然雌性点带石斑鱼(Epinephelus malabaricus)亲鱼进行强化培育,自然产卵受精。2002年繁殖季节,共获3cm以上的点带石斑鱼苗145万尾。亲鱼培育、产卵受精和胚胎发育的程序：(1)经过强化培育的亲鱼,自然产卵受精,受精率平均81％,最高97％;(2)成熟的“人工变性雄鱼”的精子头部呈球型,精子头径约3．7—6．1gm,尾长12．4～44．5μm;在水温26℃、盐度3％、pH7．9条件下,精子游动时间最长超过58min,精液中90％精子在31min停止游动,与天然雄亲鱼的精子无异,可作为生产雄亲鱼的来源;(3)在东山岛,产卵期由4月初持续到11月中旬,产卵高潮集中在4月底至5月底、9月底至10月初。在24h内,自然产卵通常从16：30持续到次日1：30;(4)产卵适宜水温为23．5—28．6℃,最适产卵水温为25．5—26．5℃;(5)水温26℃时,受精卵在盐度2．82％～2．96％,的海水中呈悬浮状态,盐度2．82％以下时下沉,盐度2．96％以上时上浮;(6)在水温24．9—27．6℃、盐度3％—3．3％、pH7．6—8．2的情况下,胚胎发育时间为21h。     

长毛对虾卵子皮层反应的研究

Morphology of the cortical reaction in the eggs of Penaeus penicillatus was studied with the light microscopy,scanning electron microscopy　and transmission electron microscopy. The cortical reaction is divided into four stages. These stages are unreacted stages, early stages, corona stages and dissipation stage. The cortical rods were released and formed a jelly coating around the surface of the egg. The jelly coating remained until the first cleavage had finished. In the end, the hatching membrane appeared around the egg. It is believed that these cortical reaction are responsible for the prevention of polyspermy by both a chemical and physical block and that also may establish a microenvironment inside a touch chorionic membrane for the developing embryo.     

肝癌实验室诊断研究进展

原发性肝癌是目前世界上致死率最高的恶性肿瘤之一,在全世界范围内的发病率有逐年上升的趋势。肝癌的诊断特别是早期诊断,对于提高患者生存率至关重要。我们简要综述了国内外肝癌实验室诊断中的常用标志物以及检测方法的进展,并展望了其发展前景。     

长毛对虾卵子皮层反应的研究

Morphology of the cortical reaction in the eggs of Penaeus penicillatus was studied with the light microscopy,scanning electron microscopy　and transmission electron microscopy. The cortical reaction is divided into four stages. These stages are unreacted stages, early stages, corona stages and dissipation stage. The cortical rods were released and formed a jelly coating around the surface of the egg. The jelly coating remained until the first cleavage had finished. In the end, the hatching membrane appeared around the egg. It is believed that these cortical reaction are responsible for the prevention of polyspermy by both a chemical and physical block and that also may establish a microenvironment inside a touch chorionic membrane for the developing embryo.