R. D. Fitzgerald's F. L. S. „Australian Orchids“

Ohne Zusammenfassung     

Why There is a One-way Crossability Between D. melanogaster and D. simulans?

In the Drosophila melanogaster complex, females D. melanogaster mate relatively easily with males Drosophila simulans but the reciprocal cross is rare. The species sexual isolation is mainly based on chemical and acoustic signal exchanges between partners. The male side of this communication is investigated in this paper in order to understand the asymmetry. In D. melanogaster the acoustic signature is highly significant, and is synergistically reinforced by the chemical signal. In D. simulans the importance of the two signaling channels seems to be reversed. This could explain why D. simulans males produce less precise interpulse interval (IPI) mean value in the courtship song, which can readily overlap those of D. melanogaster. As the males of the two species use the same chemical key, D. simulans males could be recognized by D. melanogaster females as a conspecific.     

关于南雄盆地K/T界线问题的讨论──与D.A.拉塞尔,D.E.拉塞尔,A.R.斯威特商榷

陆相山间盆地的沉积过程远比某些海相的沉积过程复杂。评述了当今流行的利用沉积速率来检验、甚至推断陆相磁性地层极性时序列方法的可靠性。南雄盆地地层及哺乳动物化石的分布研究表明,前人所定Ｋ／Ｔ界线上下地层连续,并不象一些学者认为的在上湖组底部缺失了数百万年的沉积。     

D.血浆组分的检定要求

<正>1.引言 对于白蛋白,血浆蛋白组分,免疫球蛋白和凝血因子浓缩物的许多共同的要求,在3-11节中已予考虑。然而,为明确起见,将凝血因子浓缩物的一些特殊要求纳入各节是适宜的。 2.术语 粘制原液材料(BulK Purified materia)由合并原材料经分级分离制备的粉状或液体材料。     

浅谈D.Y.F与CAI的结合运用

素质教育的目标是提高学生全面素质,使他们能够符合当前社会发展的要求,但目前的教学模式是以教师教为主（即注入式教学）,无法充分发挥学生的主体作用。ＤＹＦ（定向质疑———引导探索———反馈运用）是吉林市教育学院为了克服传统教学的弊端,变教师满堂灌为以...     

浅谈D.Y.F与CAI的结合运用

Ｄ．Ｙ．Ｆ（定向反馈—引导探索—反馈运用）是吉林市教育学院以科学方法为指导,以教育心理学为理论基础,在传统教学经验的基础上,设计的一种课堂教学类型。ＣＡＩ（计算机辅助教学）则是以计算机为媒介,通过学生与计算机之间的交互作用来达到教学目的的一种现代化教...