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tag sleep wake cycle developmental biology cell molecular biology ecology

Genetic And Molecular Mysteries Of Sleep Are Keeping Researchers Alert
Alison Mack | Oct 27, 1996 | 9 min read
SIDEBAR : Sleep Research Resources Some consider sleep an unavoidable nuisance; others, a sweet indulgence. For the most part, though, we take our slumber for granted, rarely considering why we spend a hefty chunk of our lives unconscious. But for sleep researchers, that question represents a supreme mystery. Exactly what purpose sleep serves, as well as how the body regulates sleeping and waking, remain largely unknown. Behavioral scientists and physiologists have pursued these questions for
Who Sleeps?
The Scientist and Jerome Siegel | Mar 1, 2016 | 10+ min read
Once believed to be unique to birds and mammals, sleep is found across the metazoan kingdom. Some animals, it seems, can’t live without it, though no one knows exactly why.
Keeping Time with Drosophila
Laura Bonetta | Feb 3, 2002 | 10 min read
Circadian clocks—the biological timekeepers that operate on a daily cycle—keep virtually every living creature in tune with its environment. These internal clocks regulate a wide range of fundamental biological processes, including movement, smell, sleep, mating, and feeding. A true circadian clock is endogenous; that is, it keeps time even in the absence of external cues. The clock can, however, be reset, or entrained, by daylight, allowing the synchronization of circadian rhythms t
Surpassing the Law of Averages
Jeffrey M. Perkel | Sep 1, 2009 | 7 min read
By Jeffrey M. Perkel Surpassing the Law of Averages How to expose the behaviors of genes, RNA, proteins, and metabolites in single cells. By necessity or convenience, almost everything we know about biochemistry and molecular biology derives from bulk behavior: From gene regulation to Michaelis-Menten kinetics, we understand biology in terms of what the “average” cell in a population does. But, as Jonathan Weissman of the University of Califo
How to Create a Successful Fish Tale?
A. J. S. Rayl | Aug 19, 2001 | 10+ min read
More than 80 percent of the planet's living organisms exist only in aquatic ecosystems. Some may harbor secrets to human origins, and clues, treatments--perhaps even cures--for human disease. Some are critical bioindicators that portend the health of the biosphere. Yet, overall, scientists know little about the biochemical processes of these life forms. The vast, rich knowledge within the oceans and freshwater systems on Earth remains virtually untapped, because in the world of biological resear
Mammalian Cloning Milestone: Mice from Mice from Mice
Ricki Lewis | Aug 16, 1998 | 9 min read
It was fitting, perhaps, that Cumulina the cloned mouse made her debut at a press conference in New York City on Gregor Mendel's birthday, July 22. As the father of genetics, Mendel explained genetic variability. As the first mouse cloned from an adult's cell nucleus, Cumulina represents the ultimate in genetic uniformity. So far, 50 mice have been cloned, some through three generations. Photo: ProBio America Inc. THREE GENERATIONS: Researchers at the University of Hawaii cloned these three g
Consciousness Studies: Birth of an Empirical Discipline?
Eugene Russo | May 9, 1999 | 6 min read
The Penrose-Hameroff Orch OR model places the essential aspect of consciousness at the level of quantum computation in microtubules within the brain's neurons. "Tubulin" proteins comprising microtubules can switch between states ("bits") and also be in quantum superposition of both states simultaneously ("protein qubits"). In the last several years, books, papers, and conferences have, with varying degrees of success, attempted to link the once-strange bedfellows of science and conscio
Consciousness Studies: Birth of an Empirical Discipline?
Eugene Russo | May 9, 1999 | 9 min read
The Penrose-Hameroff Orch OR model places the essential aspect of consciousness at the level of quantum computation in microtubules within the brain's neurons. "Tubulin" proteins comprising microtubules can switch between states ("bits") and also be in quantum superposition of both states simultaneously ("protein qubits"). In the last several years, books, papers, and conferences have, with varying degrees of success, attempted to link the once-strange bedfellows of science and consciou
Notebook
The Scientist Staff | Jun 22, 1997 | 7 min read
GOOD GOING: Commerce Undersecretary for Technology Mary Good is returning to private life after serving a little more than one term. The Clinton administration lost another key technology official when Mary L. Good, Undersecretary for Technology in the Department of Commerce, stepped down on June 3 to return to private life in Little Rock, Ark. Good, who was unavailable for comment, had served in the department since the beginning of Bill Clinton's first term. She was known as a strong advocate

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