褐云玛瑙螺不同组织的酯酶同工酶研究

本文采用聚丙烯酰胺凝胶电泳法分析了褐云玛瑙螺(Achatina fulica)的心脏、肝脏、肾脏、胃、嗉囊、足、外套膜、两性腺、输卵管、蛋白腺、卵及卵壳腺等十二种不同组织中的酯酶同工酶,基本谱型可见15条谱带,实验结果表明不同组织间同工酶谱存在差异。具有组织学结构近似的组织,同工酶酶谱上反映差异较小,而执行不同生理功能的组织其差异明显。     

Lectin receptors in snail proteogalactans. II.Archachatina marginata andAchatina achatina (preliminary report)

Summary The lectin receptor sites on the proteogalactans from the albumin glands of West African land snails,Archachatina marginata andAchatina achatina have been studied by precipitin reactions using the agar-gel double diffusion technique with various lectins. The proteogalactans from both snails have predominantly terminal -D-galactose structures; but they show characteristic differences in the topographical features at the surfaces of the carbohydrate structures presumed to be compatible with the combining site for these lectins.     

Population structure of a native and an alien species of snail in an urban area of the Atlantic Rainforest

Native Megalobulimus paranaguensis was identified on Brazil’s Ilha Porchat promontory, an area that Achatina fulica commonly populates. The population structures of these species were investigated for interactions. Spatial distribution, niche overlap and mark–recapture analysis were conducted. The outer lip of M. paranaguensis and environmental variables were measured. One and two abundance peaks were observed for A. fulica and M. paranaguensis, respectively. Survivorship was higher in A. fulica. Distribution was aggregate for M. paranaguensis, whereas for A. fulica it varied from random to aggregate. Both species aggregate as abundance increases. The lifespan of M. paranaguensis in this location is shorter than its lifespan in a nearby location. Achatina fulica was affected by soil temperature and humidity; M. paranaguensis was influenced by humidity. Niche overlap was random. The results show that M. paranaguensis can keep its natural activity and abundance in the presence of A. fulica, but environmental degradation impacts M. paranaguensis and should be evaluated.     

用褐云玛瑙螺(软体动物门:玛瑙螺科)消化液分离漆树(漆树科)漆汁道研究报告

本文报导应用褐云玛瑙螺(Achatina fulic Fer.)消化液分离漆树(Rhus verniciflua Stokes)的漆汁道的力法。据观察,分离的漆汁道是一层上皮细胞组成圆柱形和扁柱形的结构,分为六种类型(图1—2):(1)漆汁道上有小穿孔;(2)漆汁道联结成环状的结构;(3)漆汁道联结成链状的结构;(4)漆汁道联结成网状的结构;(5)漆汁道上同时有小穿孔和环状或链状的结构;(6)漆汁道下具一级或二级分枝的结构。研究漆汁道类型,可能对漆树分类、产量预测、育种、以及改进割漆技术等都有一定参考的价值。     

厦门地区广州管圆线虫的流行病学调查

调查了人体脑炎病原—广州管圆线虫在厦门地区的存在与散布情况。结果证实褐家鼠和褐马云玛瑙螺分别是该地区本线虫的终末宿主和中间宿主,其自然感染率分别为31.8％和34.1％;感染强度分别是平均13条成虫和24条幼虫。感染期幼虫在玛瑙螺体内以肺组织含虫率最高(72.0％),还讨论了生物和环境因子与本线虫自然感染的关系。     

白玉蜗牛肉的脂肪酸组成特点分析

利用索氏提取法提取白玉蜗牛肉冻干粉中的脂肪酸,通过三氟化硼法进行甲酯化。以气相色谱-质谱联用仪进行组分鉴定。结果表明,蜗牛肉冻干粉的总脂得率为2.73 ％,在总脂的甲酯化产物中检测鉴定出15种脂肪酸,含9种不饱和脂肪酸,占总量的72.22 %,其中亚油酸占17.42 %,油酸占16.54 %,花生四烯酸占13.13 %,EPA占2.14 %。白玉蜗牛肉富含多不饱和脂肪酸(占总脂的48.03 %),可以用于多不饱和脂肪酸类新型功能食品与保健品的开发。