The ultrastructure of the X organ sinus gland complex in sexually immature Chinese mitten crab Eriocheir sinensis was examined under the electron microscope. The sinus gland (SG) is composed primarily of nerve terminals and glial cells. The terminal contains a great number of membrane bound granules, mitochondria, rough endoplasmic reticulum and electron lucent vesicles. The profiles of the terminals are sometimes exhibited finger like projections. The X organ (XO) locates at the ventral surface of the medulla terminalis ganglion in the eyestalk, oppositing to SG. According to the features of granule size, shape, electron density and cytoplasm, 6 types of terminals in SG and 7 types of neurosecretory (NS) cells in XO were identified. The release process by exocytosis of the granules in SG was observed and a tentative comparison was made for the granules between different types of terminals and NS cells. It seemed that they had a good correspondence since no change in electron density and just a slight increase of sizes was shown.
采用酪蛋白平板初筛和纤维蛋白原平板复筛法从发酵食品中筛选出一株溶栓菌株SJ1206,菌落边缘为完整的圆形、表面隆起、呈乳白色,是一株革兰氏阳性细菌,可以产生芽胞。此外,生理生化反应结果表明该菌能利用麦芽糖和葡萄糖,精氨酸、赖氨酸、尿素和七叶苷反应均为阳性。16S r DNA序列比对分析结果表明该菌与苏云金芽胞杆菌有同源性,属于芽胞杆菌属。
