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tag film developmental biology

Beyond Film: Laboratory Imagers
Jorge Cortese | Apr 1, 2002 | 9 min read
Years ago, researchers had only one data-imaging option: autoradiography. These scientists tagged samples—whether nucleic acid, protein, cell, or tissue—with radioactive labels, and captured images on film. Safety concerns, convenience, and sensitivity, spurred the development of alternative techniques, and today, researchers can choose from a range of options, including fluorescence, chemifluorescence, and chemiluminescence, in addition to autoradiography. Fluorescence occurs when
Freeze Frame
Jeffrey M. Perkel | Feb 1, 2009 | 10 min read
How to troubleshoot sample preparation for cryo-electron microscopy, an up-and-coming structural biology technique.
How Cells Find Their Way
Laura Defrancesco | Sep 2, 2001 | 5 min read
Organisms need to sense their environment. By sensing, they can develop, heal wounds, protect against invaders, and create blood vessels. Chemotaxis, or directional sensing, allows cells to detect chemicals with exquisite sensitivity. Some chemotactic cells can sense chemical gradients that differ by only a few percent from a cell's front to its back. Although discovery of the molecule types involved in chemotaxis, as with other kinds of cell signaling events, has mounted, the details of how thi
Top Ten Innovations 2011
The Scientist | Jan 1, 2012 | 10+ min read
Our list of the best and brightest products that 2011 had to offer the life scientist
The Shape of Heredity
Susan M. Gasser | Jul 1, 2009 | 10+ min read
By Susan M. Gasser The Shape of Heredity Tracking the dance of DNA and structural proteins within the nucleus shows that placement makes the difference between gene activity and silence. What's true of the best architecture is also true of cellular structures: form follows function. We biologists often take this mantra to an extreme, searching for the function of a molecule or gene without much consideration of its structure, its phys
Light Microscopy Enables Scientists to Peer Inside Cells In Real Time
Holly Ahern | Jan 21, 1996 | 9 min read
Although the laws of physics dictate how much an object can be magnified and still clearly seen, scientists continue to expand their view of the microscopic world beyond the cellular level. New light microscopy methods and technology have made it possible for scientists to view previously undetectable tiny structures inside of cells, and to examine such objects in real time as cells carry out their activities. "New microscopy techniques, particularly those involving fluorescence microscopy and

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