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Richard Woltereck's Concept of Reaktionsnorm
By: B. R. Erick Peirson
| Published: Sep 06, 2012
Richard Woltereck first described the concept of Reaktionsnorm (norm of reaction) in his 1909 paper 'Weitere experimentelle Untersuchungen uber Art-…
Woltereck, Richard, 1877-1944EvolutionDaphniaEmbryologyHeredity
George Richard Tiller (1941-2009)
By: Mark Zhang
| Published: Jul 16, 2012
George Richard Tiller, a doctor who performed abortions in Wichita, Kansas, was shot to death on 31 May 2009 by Scott Roeder. As the director of one…
AbortionLate-term abortionAbortion servicesFetusAbortion, Legal
Alexis Carrel's Immortal Chick Heart Tissue Cultures (1912-1946)
By: Lijing Jiang
| Published: Jul 03, 2012
In an effort to develop tissue culture techniques for long-term tissue cultivation, French surgeon and biologist Alexis Carrel, and his associates,…
Carrel, Alexis, 1873-1944Tissue cultureCellsGerm CellsEmbryos
Eduard Friedrich Wilhelm Pflüger (1829-1910)
By: Megan Kearl
| Published: Jun 22, 2012
Eduard Friedrich Wilhelm Pflüger was a physiologist known for his research on respiration, the respiratory quotient, experimenting on the effects of…
PeopleRespiratory quotientRespirationEmbryologyEmbryos
Bicoid
By: Jack Resnik
| Published: Jun 02, 2012
Bicoid is the protein product of a maternal-effect gene unique to flies of the genus Drosophila . In 1988 Christiane Nüsslein-Volhard identified…
Nüsslein-Volhard, C. (Christiane)EmbryosMorphogenesisTuring, Alan, 1912-1954Morgan, Thomas Hunt, 1866-1945
Richard Woltereck (1877-1944)
By: B. R. Erick Peirson
| Published: May 13, 2012
Richard Woltereck was a German zoologist and hydrobiologist who studied aquatic animals and extended the concept of Reaktionsnorm (norm of reaction)…
PeopleEvolutionHeredityEmbryologyAquatic animals
Victor Ambros (1953-)
By: May Catherine, Justin M. Wolter
| Published: May 13, 2012
Victor Ambros is a professor of molecular medicine at the University of Massachusetts Medical School, and he discovered the first microRNA (miRNA) in…
PeopleRNAGenesEmbryosCaenorhabditis elegans
The Source-Sink Model
By: Jack Resnik
| Published: May 07, 2012
The source-sink model, first proposed by biologist Francis Crick in 1970, is a theoretical system for how morphogens distribute themselves across…
Crick, Francis, 1916-2004Nobel Prize winnersEmbryosMorphogenesisGenes
"On the Permanent Life of Tissues outside of the Organism" (1912), by Alexis Carrel
By: Lijing Jiang
| Published: May 06, 2012
'On the Permanent Life of Tissues outside of the Organism' reports Alexis Carrel's 1912 experiments on the maintenance of tissue in culture media. At…
Tissue cultureStem CellsStem cells--ResearchEmbryologyGerm Cells
"How do Embryos Assess Risk? Vibrational Cues in Predator-Induced Hatching of Red-Eyed Treefrogs" (2005), by Karen Warkentin
By: Karla T. Moeller
| Published: Apr 07, 2012
In 'How do Embryos Assess Risk? Vibrational Cues in Predator-Induced Hatching of Red-Eyed Treefrogs' (2005), Karen Warkentin reported on experiments…
EmbryosRed-eyed treefrogPredation (Biology)Science experimentsAmphibians--Eggs