Richard Lenski: Evolution in a Flask (MWV61)

submitted by: MicrobeWorld
In episode 61 of MicrobeWorld Video, filmed at the American Association for the Advancement of Science Meeting in Vancouver, Canada on February 17th, 2012, Dr. Stan Maloy talks with Richard Lenski Ph.D., Hannah Professor of Microbial Ecology, Michigan State University, about his research into the evolution of bacteria and the new frontier of digital evolution. Lenski's Long Term Evolution Experiment with E. coli has seen over 50,000 new generations since its inception in 1998. This has led...

The Environment Ontology: Linking Environmental Data

submitted by: dougramsey
Norman Morrison, University of Manchester Every biological specimen that is collected or sampled — whether for a museum collection, for epidemiological studies, for population studies, for ecological research, for research into evolution, biodiversity or sustainability, indeed any biological research — comes from a particular habitat where particular physical conditions prevail. How ever, at present there is no accepted semantic standard for describing the environment from which these...

The Living Matrix

submitted by: thelivingmatrix
"The Living Matrix: The Science of Healing," trailer; The movie uncovers new ideas about the intricate web of factors that determine our health and interviews a group of dedicated scientists, psychologists, bioenergetic researchers and holistic practitioners, who are finding healing potential in new places. (The energetic information-based medicine looks particularly powerful.)

Growth Control in Animal Development by Martin Raff- Part 1: Cell Size Control (40:56)

submitted by: video_collector
The size of an organ or organism depends mainly on the sizes and numbers of the cells it contains. In the first segment of my talk, I describe our work on cell size control in cultures of purified rat Schwann cells. Most proliferating cells grow before they divide, but it is not known how growth and division are coordinated to ensure that cells divide at an appropriate size. We have found that extracellular signals can control cell growth and cell-cycle progression separately and that the...

Stem Cells: Biology and Promise for Regenerative Medicine by Elaine Fuchs, Jan. 2007 - Part 1: Introduction to Stem Cells and Ethical Issues (35:11)

submitted by: video_collector
During embryogenesis, a single fertilized oocyte gives rise to a multicellular organism whose cells and tissues have adopted differentiated characteristics or fates to perform the specified functions of each organ of the body. As embryos develop, cells that have acquired their particular fate proliferate, enabling tissues and organs to grow. Even after an animal is fully grown, however, many tissues and organs maintain a process known as homeostasis, where as cells die, either by natural...