Archive for the ‘christmas’ tag
Felix Francis
what are some scientists who have made contributions in the field of cells?
besides these few:
-robert brown
-robert hooke
-anton van leeuwenhoek
-dutrochet
-felix dujardin
-matthias schlieden
-theodor schwann
-rudolph virchow
-james watson
-francis crick
-rosalind franklin
-louis pasteur
-robert koch
George Palade, who died on October 10 aged 95, won the 1974 Nobel prize for Physiology or Medicine (with Albert Claude and Christian de Duve) for his work in establishing the structure and functions of important components of living cells; he was the only Romanian-born scientist to have won a Nobel.
Working in the 1950s and 1960s, Palade helped to develop the technique of differential centrifugation to separate the different components of cells. He then turned to electron microscopy, developing techniques to produce thin slices of cells and to "fix" these slices and the substances isolated by centrifugation so that they could be viewed and analysed.
As a result he was able to identify the structures and functions of, among other things, mitochondria (tiny organelles in the cell), demonstrating that they oxidise fats and sugars, producing chemical energy in the form of adenosine triphosphate; and ribosomes, smaller organelles scattered round the cell, which he showed to be sites where proteins are assembled. He also helped to explain how proteins are transported out of the cell, as, for example, when a pancreatic cell secretes insulin.
Stem Cells -
James Alexander Thomson (born December 20, 1958, at Oak Park, Illinois, USA) is an American developmental biologist. He serves as director of regenerative biology at the Morgridge Institute for Research in Madison, Wisconsin, and is a professor at the University of Wisconsin School of Medicine and Public Health. In 2007, he became an adjunct professor in the Molecular, Cellular, and Developmental Biology (MCDB) Department at the University of California, Santa Barbara.[1] He is a member of the National Academy of Sciences. In the May 12, 2008, issue of TIME magazine, he was named one of 100 of the most influential people in the world.
Golgi Body -
Camillo Golgi was born in July 1843 in Corteno, a village in the mountains near Brescia in northern Italy