位于上海新天地太平桥人工湖畔,依二三十年代 Art Deco 设计理念而建的企业天地迎来了由著名的雕塑家夫妇萨璨如Cynthia Sah 和尼古拉·贝杜 Nicolas Bertoux 特别为企业天地度身定做的两件雕塑作品:"Fluid Presence"和&q...位于上海新天地太平桥人工湖畔,依二三十年代 Art Deco 设计理念而建的企业天地迎来了由著名的雕塑家夫妇萨璨如Cynthia Sah 和尼古拉·贝杜 Nicolas Bertoux 特别为企业天地度身定做的两件雕塑作品:"Fluid Presence"和"WelcomingRepose"。与这一对雕塑家夫妇共同分享其创作的灵念与喜悦,感受到的,不仅仅是清新舒畅的文艺情趣,还有一种亲切自然的大师气质,令人不由得被其周身散发出高贵优雅所吸引。展开更多
Juvenile hormone plays an important role in controlling the processes of metamorphosis and reproduction of most insects. There has been a growing amount of research works on the determination of JH titers at various p...Juvenile hormone plays an important role in controlling the processes of metamorphosis and reproduction of most insects. There has been a growing amount of research works on the determination of JH titers at various physiological levels in a variety of insect species, yet our knowledge concerning JH titer lags behind that of ecdysteroid titer. The reasons are: (ⅰ) JH titers in most insects seem to be generally quite low, and (ⅱ) it is difficult to separate JH from the lipids that are present in rather large quantities and have similarities in chemical and physical properties.展开更多
Developmental changes in hemolymph ecdysteroid level, ecdysteroid synthesis by prothoracic glands （PGs） in vitro, prothoracicotropic hormone （PTTH） activity in brain extracts, and PTTH activity in the hemolymph we...Developmental changes in hemolymph ecdysteroid level, ecdysteroid synthesis by prothoracic glands （PGs） in vitro, prothoracicotropic hormone （PTTH） activity in brain extracts, and PTTH activity in the hemolymph were measured during the fifth larval instar of the Eri silkworm, Samia cynthia ricini. The changing patterns of hemolymph ecdysteroid level and ecdysteroid synthesis by laGs in vitro are similar to each other, with maximums on day 9. However, on this day, hemolymph ecdysteroid level was substantially higher than ecdysteroid synthesis by PGs in vitro suggesting a high PTTH activity in the hemolymph on day 9. Moreover, the changing pattern of PTTH activity in brain extracts is also similar to that of PTTH activity in the hemolymph, both peaking on day 9. However, on this day, activity in brain extracts was much smaller than PTTH activity in the hemolymph implying that most PTTH synthesized by the brain is secreted to the hemolymph and the brain stores a very little amount of PTTH. This study provides unique insights onto the hormonal regulation of ecdysteroid synthesis in the Eri silkworm and is useful for our future studies on signal transduction of insect neurolaelatides.展开更多
文摘位于上海新天地太平桥人工湖畔,依二三十年代 Art Deco 设计理念而建的企业天地迎来了由著名的雕塑家夫妇萨璨如Cynthia Sah 和尼古拉·贝杜 Nicolas Bertoux 特别为企业天地度身定做的两件雕塑作品:"Fluid Presence"和"WelcomingRepose"。与这一对雕塑家夫妇共同分享其创作的灵念与喜悦,感受到的,不仅仅是清新舒畅的文艺情趣,还有一种亲切自然的大师气质,令人不由得被其周身散发出高贵优雅所吸引。
基金Project supported by the National Natural Science Foundation of China.
文摘Juvenile hormone plays an important role in controlling the processes of metamorphosis and reproduction of most insects. There has been a growing amount of research works on the determination of JH titers at various physiological levels in a variety of insect species, yet our knowledge concerning JH titer lags behind that of ecdysteroid titer. The reasons are: (ⅰ) JH titers in most insects seem to be generally quite low, and (ⅱ) it is difficult to separate JH from the lipids that are present in rather large quantities and have similarities in chemical and physical properties.
文摘Developmental changes in hemolymph ecdysteroid level, ecdysteroid synthesis by prothoracic glands （PGs） in vitro, prothoracicotropic hormone （PTTH） activity in brain extracts, and PTTH activity in the hemolymph were measured during the fifth larval instar of the Eri silkworm, Samia cynthia ricini. The changing patterns of hemolymph ecdysteroid level and ecdysteroid synthesis by laGs in vitro are similar to each other, with maximums on day 9. However, on this day, hemolymph ecdysteroid level was substantially higher than ecdysteroid synthesis by PGs in vitro suggesting a high PTTH activity in the hemolymph on day 9. Moreover, the changing pattern of PTTH activity in brain extracts is also similar to that of PTTH activity in the hemolymph, both peaking on day 9. However, on this day, activity in brain extracts was much smaller than PTTH activity in the hemolymph implying that most PTTH synthesized by the brain is secreted to the hemolymph and the brain stores a very little amount of PTTH. This study provides unique insights onto the hormonal regulation of ecdysteroid synthesis in the Eri silkworm and is useful for our future studies on signal transduction of insect neurolaelatides.
