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tag convergent extension culture evolution

Different colored cartoon viruses entering holes in a cartoon of a human brain.
A Journey Into the Brain
Danielle Gerhard, PhD | Mar 22, 2024 | 10+ min read
With the help of directed evolution, scientists inch closer to developing viral vectors that can cross the human blood-brain barrier to deliver gene therapy.
Book Excerpt from When Brains Dream
Robert Stickgold and Antonio Zadra | Dec 1, 2020 | 8 min read
Ferreting out the biological function of dreaming is a frontier in neuroscience.
The Mechanobiology Garage
Andy Tay | Jul 16, 2017 | 7 min read
New tools for investigating how physical forces affect cells
Top 10 Innovations 2014
The Scientist | Dec 1, 2014 | 10+ min read
The list of the year’s best new products contains both perennial winners and innovative newcomers.
All's Well that Ends Well: A Profile of Specialty Microwell Plates
Brent Johnson | Sep 26, 1999 | 10+ min read
Date: September 27, 1999Table of Specialty Microplates The story of the microplate is one of those tales of history that either has been forgotten or was never clearly understood. According to Barry Lazar of Dynex Technologies, formerly Dynatech Laboratories, the origin of what is now commonly referred to by Dynex's registered trademark of Microtiter plates began with Gyola Takatsy, a Hungarian-born scientist who was trying to scale down serology tests. His first prototype became available in 1
Concord And Conflicts Blur Science And Invention
Fred Cowan | Mar 29, 1998 | 6 min read
The United States patent system, as envisioned by Benjamin Franklin and provided for in the Constitution, has a mandate to stimulate innovation and commerce to benefit society. To accomplish this, inventors obtain patents to protect intellectual-property rights by creating temporary monopolies to market inventions without competition. A major tenet that "Basic research is the source of fundamental knowledge that eventually leads to innovation, technology development, and economic growth" (Rep.
For Olfaction, a Hypothesis is Felled
Peter Mombaerts | Oct 24, 2004 | 6 min read
Peter MombaertsCourtesy of Peter MombaertsRarely do scientific studies claim that something is not the case. Rarer still do negative results appear in top-tier journals. Yet two recent papers in Nature describe what olfactory sensory neurons do not do.12The olfactory system is often compared to the immune system. The key cell types in each system, the olfactory sensory neuron (OSN) and the lymphocyte, can detect a wide variety of chemicals, both natural and synthetic. Chemical recognition by the
Variations on a Gene
Amy Francis | Jul 23, 2000 | 10+ min read
Photodisc Although President Bill Clinton surely had something in mind during his 2000 State of the Union address when he asked the nation to "celebrate our diversity," insights into human diversity at the molecular level are promising to speed drug discovery and revolutionize medicine to mark- edly improve human health. Individuals differ at one in 1,000 base pairs, which adds up to a whopping number of human genetic variations when applied to the roughly three billion base pairs of the human g
Telomere Findings May Yield Tips For Treating Cancer, Geriatric Disorders
Ricki Lewis | Feb 18, 1996 | 7 min read
Geriatric Disorders Author: Ricki Lewis SIDEBAR : TELOMERE BIOLOGY RESOURCES Chromosome tips, called telomeres, have long fascinated geneticists because they protect chromosomes from degradation. And recent research has revealed another vital role for telomeres: As they shrink with each cell division, they keep a biochemical tally of the number of divisions remaining in a cell's lifetime. If this precise control goes awry, the biochemical consequences could be dire, such as uncontrolled growt
In A Darwinian World, What Chance For Design?
Steve Bunk | Apr 12, 1998 | 7 min read
Swiss anthropologist Jeremy Narby counts himself among the relatively thin ranks of scientists willing to publicly announce their conviction that nature is "minded," that an intelligence lies behind the development of life. Such a position is heresy to the prevailing scientific view of naturalism, which holds that nature is self-sufficient and the result of undirected processes. These two differing viewpoints usually are framed in the context of a debate between theology and science--creationis

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