Mekanik 1980

Dev104760 1971..1980

The ability to image cells live and in situ as they proliferate and differentiate has proved to be an invaluable asset to biologists investigating developmental processes. Here, we describe a Spectrum of Fates approach that allows the identification of all the major neuronal subtypes in the zebrafish retina simultaneously. Spectrum of Fates is based on the combinatorial expression of differentl...

Computational Complexity Since 1980

The field of computational complexity is reaching what could be termed middle age, with over forty years having passed since the first papers defining the discipline. With this metaphor in mind, the early nineteeneighties represented the end of adolescence for the area, the time when it stopped wondering what it would be when it grew up. During the childhood period of the sixties, research cent...

Amniocentesis Prior to 1980

The extraembryonic membranes [5] that surround and originate from the embryos of vertebrates such as birds [6], reptiles, and mammals are crucial to their development. They are integral to increasing the surface area of the uterus [7], forming the chorion [8] (which in turn produces the placenta [9]) and the amnion [10], respectively. The amnion [10] will ultimately surround the embryo in a flu...

Book Reviews, Winter 1980

Hans Asperger (1906-1980)

Hans Asperger studied mental abnormalities in children in Vienna, Austria, in the early twentieth century. Asperger was one of the early researchers who studied the syndrome that was later named after him, Asperger's Syndrome. Asperger described the syndrome in his 1944 publication Die Autistischen Psychopathen im Kindesalter (Autistic Psychopathy in Childhood). At that time, the syndrome was c...