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Biological/Medical

Vibrating Capsid(January 3, 2008)
Scientists try to learn the resonant frequencies of viral capsids, the better to destroy them.

Vibrating Capsid(January 3, 2008)
Scientists try to learn the resonant frequencies of viral capsids, the better to destroy them.

Submersible Hologram Microscope(March 28, 2006)
Micron-resolution pictures of marine organisms recorded in the ocean using a holographic microscope.

Skunk Cabbage Controls Its Internal Temperature(November 8, 2005)
A species of lily can maintain its internal temperature even below the freezing point.

Imaging Veins(October 12, 2004)
Subcutaneous blood flow can be imaged and re-projected on a patient's arm, helping a nurse in the task of finding a vein.

Artificial Tubes Mimic Naturally Occurring Structures(July 30, 2004)
Scientists have created strikingly complex artificial versions of tubes found in caves and the ocean floor.

Swimming Bacteria Stir Up Fluid(July 22, 2004)
Contrary to previous belief, groups of swimming bacteria can significantly mix a fluid.

Like-Charge Attraction Between Biomolecules(August 14, 2003)
Certain biomolecules of the same type, such as groups of actin proteins, can attract each other even though each >molecule has the same sign of electric charge.

Making Movies Inside Tissue(July 16, 2003)
A new imaging system relies on infrared light to take photos at varying depths inside living tissue, revealing structure that would otherwise be visible only after slicing the tumor into sections or irradiating it with ionizing x-rays.

It Doesn't Take Much to Break Up Uracil(May 7, 2003)
Uracil, one of the base units in RNA molecules, one of the fundamental building blocks of living cells, can be broken apart by electrons possessing surprisingly little kinetic energy.

Blood Vessel Networks(March 19, 2003)
A new mathematical model accurately describes the formation of blood vessel networks.

Cool Butterfly Photonic Crystals(January 27, 2003)
Natural photonic crystals add flash to some butterfly wings. New research suggests that butterflies at higher elevations may forgo the crystals and opt for dull brown wings in order to stay warm.

Self-Assembly of a Bacteria's Flagellum(December 27, 2002)
A sequence of steps shows how bacteria assemble a flagellum, which allows them to swim.

Chip-Based Protein Studies(December 13, 2002)
The flow of ions in and out of cells can be studied with a new chip-based platform.

Registry at Organic/Inorganic Interface(October 28, 2002)
For the first time, scientists have imaged in detail the crucial interface where an inorganic crystal is growing on, and in registry with, an organic material.

Noninvasive EEG(October 21, 2002)
EEGs can be performed without the need of invasive electrodes.

Leaf Vein Networks(July 2, 2002)
A simple mechanical model is helping researchers to understand the patterns formed by leaf veins.

Spiral Waves Break Hearts(January 29, 2002)
Experiments and simulations stress the importance of communication between heart cells in promoting healthy cardiac rhythms.

Diffracted X-Ray Tracking(December 7, 2001)
X-Ray Tracking is a method for monitoring the rotary motion of single DNA molecules with picometer accuracy

Swarming Bacteria(October 3, 2001)
The common soil bacteria Bacillus subtilis commences a curious migration behavior when it is exposed to elevated levels of ultraviolet light.

Random Noise and Blood Pressure (12 December, 2000)
A new experiment shows that a system in the human body that regulates blood pressure can be enhanced by the addition of random electrical noise in the nervous system.

Self-Assembled Actin-Membrane Tubules (June 29, 2000)
Researchers have made self-assembling multilayer tubules with intriguing properties, such as a curious resemblance to the outermost components of bacterial cell walls.

Femtonewton Force Measurements (May 11, 2000)
The mechanical properties of DNA molecules have been measured with femtonewton precision, 100 times better than before.

Early Cancer Detection with White Light (March 28, 2000)
Applying a powerful physics technique, MIT researchers have demonstrated a method for detecting the earliest stages of cancer in the epithelium--the inner lining of the body where 85 percent of all cancers begin.

DNA Canyon (February 11, 2000)
Attaching a short DNA molecule to two metal electrodes, Dutch researchers have found evidence that DNA acts as a semiconductor for electrical charge.

Two-Dimensional Colloids Seemingly Defy Coulomb's Law (December 21, 1999)
When tiny latex beads attach on cell-membrane-like structures, they seemingly defy Coulomb's law, which says that opposite electrical charges always attract each other.

Ultrasound Diagnosis of Burns (November 11, 1999)
In an important development for medical ultrasound, researchers can now take ultrasound pictures of the inside of the body--including painful areas containing serious burns--with devices that do not require physical contact with the patient.

Ribosome Image (September 30, 1999)
The largest molecular structure ever imaged with x-ray crystallography.

Epilepsy Model (August 26, 1999)
A new model of epilepsy suggests that the onset of seizure is related to the speed of communication between neurons.

Third Harmonic Microscope (June 2, 1999)
A new method using nonlinear optics allows the imaging of low-contrast biological samples.

Watching Pacemakers Emerge in a Petri Dish (May 10, 1999)
Putting cells in a petri dish under the right conditions causes them to form a biological network in which one or more pacemakers emerge.

MRI of a Single Mammalian Cell (December 11, 1998)
Magnetic resonance images of single rat cells show the potential for MRI to monitor organ rejection and study how natural killer cells attach to tumors.

Low-Field MRI (October 16, 1998)
MRI can be performed at very low magnetic fields with good spatial resolution.

DNA-Membrane Self Assembly (October 2, 1998)
Mixing together DNA molecules and artificial versions of the membranes that form the protective coverings of cells result in highly organized structures with many potential technological applications.

Rotating Bacteria (September 24, 1998)
Certain kinds of bacteria line themselves up and move in a circular pattern.

New Colloid Structures (June 11, 1998)
Scientists have discovered new structures that can exist in biologically important materials known as colloids.

Self-Sorting of White Blood Cells (September 11, 1997)
White blood cells sort themselves by type in an artificial environment similar to human capillary networks.

Measuring Bond Rupture Forces with the Atomic Force Microscope (August 15, 1997)
See how the atomic force microscope can measure the forces required to tear apart two complementary strands of DNA.

First Images of DNA in Sperm Cells (April 2, 1997)
Using special x-ray beams, researchers have been able to see the DNA molecules inside animal sperm cells.

Magnetic Resonance Force Microscopy (March 24, 1997)
Promising to be one of the major new microscopes of the future, the MRFM can potentially image biological objects in their natural environments at atom-scale resolution.

Laser Manipulation of Artificial Membranes (November 20, 1996)


The Pearling Instability (August 15, 1996)
The Pearling Instability is an important phenomenon in membranes made of biological materials.

Sonoluminescence and Medical Ultrasound (July 29, 1996)
Some of the sound energy used in medical ultrasound may be converted into flashes of light.