胎生蜥蜴(Lacerta Vivipara Jacquin)消化道嗜银细胞的分布及形态学观察

目的研究胎生蜥蜴(Lacerta V ivipara Jacquin)消化道嗜银细胞的分布密度及形态.方法应用Grimelius银染法.结果在胎生蜥蜴消化道中嗜银细胞分布广泛,见于其全长.其分布密度曲线大致呈“N”字形,其中胃部是嗜银细胞分布密度的高峰,幽门次之,回肠分布密度最低.嗜银细胞形态多样,主要以锥体形为主,其次还有梭形、椭圆形,条形等.广泛分布于上皮细胞基部、上皮细胞之间、腺泡上皮及腺泡之间.结论胎生蜥蜴消化道嗜银细胞分布型的形成与各部位消化功能有关;根据其形态,我们认为胎生蜥蜴消化道内嗜银细胞具有内、外分泌两种功能     

基于Jacquin分形法图像编码的Matlab仿真实现

分形图像编码具有潜在的高压缩比、解码简单等特点成为近十年来有损编码中的一个研究热点。文章阐述了分形编码的数学基础和传统分形编码Jacquin方法的编解码原理,最后利用Matlab工具对图像的Jacquin分形法进行了实验仿真。实验结果表明,Jacquin分形法搜索最佳匹配块的编码时间较长,而解码过程简单快捷。提高图像编码速度将是Jacquin分形法今后改进的主要内容。     

胎生蜥蜴(Lacerta vivipara)生殖行为及生殖策略的研究

胎生蜥蜴系卵胎生蜥蜴,每年繁殖一次,产仔期集中在7月初到8月末,分娩时间为每天上午十一点到下午四点,平均窝仔数为7．8(7～11)．胎生蜥蜴的生殖行为复杂．胎生蜥蜴雌性采取高投入的生殖策略,其平均生殖投入率为0．383;雌蜥体重、生殖投入率与窝仔数呈正相关,体长与窝仔数关系不大．     

The membrane component of the ribosomal bodies from the lizardLacerta sicula: a freeze-etching study

Summary We have studied, using the freeze-etching technique, the cytomembranes of the flat cystenae, regularly interposed between the cristalline sheets of ribosomes, inside the ribosomal bodies of the hibernating lizardLacerta sicula. The results show the presence, on the protoplasmic face (PF), of numerous IMPs (intramembrane particles) which can be separated into two populations. The flatter ones appear to be arranged in a regular pattern, with the support of the optical diffraction analysis, can be correlated with the disposition of the ribosomes in the cristalline sheets.6 October 1986     

Mites,nematodes and the multimillion dollar weevil

The African oil palm (Elaeis guineensis Jacquin) is a major plantation crop throughout much of the Old and NewWorld tropics, and its successful pollination is dependent primarily on the flower weevil, Elaeidobius kamerunicus (Faust). Among the several invertebrates found with E. kamerunicus in oil palm flowers are a bacteriophagous nematode and an undescribed mite species of the ascid genus Proctolaelaps. Both utilize E. kamerunicus for dispersal from senescent to newly opened oil palm inflorescences, and Proctolaelaps sp. feeds on the phoretic nematodes during the transfer phase.