聚合物母液管道熟化可行性室内实验

利用输送管道完成聚合物母液的熟化,将大大降低地面工程的投资。为此进行了聚合物母液管道熟化实验,初步的实验表明：未熟化的聚合物混合液经管道输送后,黏度有了不同程度的增高。将聚合物溶液的降解机械剪切力转化为促进聚合物进一步溶解的搅拌动力,利用管道熟化作为聚合物溶液熟化过程的一部分,是需要研究的课题。     

The gonad morphology and maturation in Arctic Calanus species

Gonad morphology and maturation of the dominant Arctic copepod species Calanus glacialis and C. hyperboreus were studied using a combination of observations on whole animals (“whole-body analysis”) and histological sections to describe basic reproductive processes. The comparison with C. finmarchicus shows that the internal organisation of the gonads is the same in the Calanus species: from the dorsally laying ovary, two anterior diverticula extent into the head region and two posterior diverticula extend into the abdomen. In the diverticula, the oocytes increase in size and development stage in a dorso–ventral direction. There were no physiological differences between the oocytes in the diverticula and oviducts in any of the three species. During gonad development, the morphological modifications of the gonads mainly refer to an increase in number, developmental stage and size of the oocytes both in diverticula and oviducts. During spawning the most ventral layer of oocytes is released, and then the adjacent dorsal layer begins final maturation. Thus, the final maturation processes occur simultaneously as it is essential to produce clutches.