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December 24, 2007

Channel Gating

With the ultrafast electron microscope, Caltech researchers gathered frames to create this movie of a channel that opens and closes in crystals of CuTCNQ as electron pulses are turned on and off.

From Article »

In The Niche Of Time

Unique ultrafast elecron imaging tools use time to help elucidate function.

December 17, 2007

Type 1: Commercial Lithium-Ion Battery

When subjected to an industry-standard nail-puncture abuse test, which is designed to determine how a battery responds as it is being destroyed, two types of commercial lithium-ion batteries (type 1 shown) violently spew flaming material. In contrast, Enerdel's novel lithium-titanate-based battery safely tolerates the destructive abuse.

From Article »

Burning Batteries

Hazardous failures of lithium-ion batteries are uncommon, yet researchers strive to minimize dangers.

December 17, 2007

Type 2: Commercial Lithium-Ion Battery

When subjected to an industry-standard nail-puncture abuse test, which is designed to determine how a battery responds as it is being destroyed, two types of commercial lithium-ion batteries (type 2 shown) violently spew flaming material.

From Article »

Burning Batteries

Hazardous failures of lithium-ion batteries are uncommon, yet researchers strive to minimize dangers.

December 17, 2007

Novel Lithium-Titanate-Based Battery

Enerdel's novel lithium-titanate-based battery safely tolerates the destructive abuse.

From Article »

Burning Batteries

Hazardous failures of lithium-ion batteries are uncommon, yet researchers strive to minimize dangers.

December 17, 2007

Noctilucent Clouds

Polar mesospheric clouds at the North Pole were observed by the AIM satellite from May to September.

From Article »

Night-Shining Clouds

Studies of high-altitude clouds may illuminate atmospheric changes.

December 10, 2007

Rebound

A droplet of hexadecane bounces on a surface etched with nanoscale pillars and troughs. Water, a liquid with high surface tension, has been captured bouncing in this way countless times before, but a low-surface-tension liquid such as hexadecane had never been before.

From Article »

Rolling Out The Oil

Chemistry and microstructure together repel organic liquids

December 10, 2007

Hinode's Solar Optical Telescope

This movie, taken by the Hinode spacecraft's Solar Optical Telescope, shows fine, horizontal threadlike structures that could be evidence for elusive Alfven electromagnetic waves, which propagate along electromagnetic lines in the corona.

From Article »

Solar Mystery Solved

Japanese spacecraft finds conclusive evidence of waves that make sun's corona much hotter than its surface.

December 10, 2007

Hinode's X-ray Telescope

This movie, taken by the Hinode spacecraft's X-ray telescope, shows the sun's north polar jet.

From Article »

Solar Mystery Solved

Japanese spacecraft finds conclusive evidence of waves that make sun's corona much hotter than its surface.

December 3, 2007

Musical Interlude

An animation of CO oxidation put to music by composer Philip Mayers for Ertl in 1996.

From Article »

Surface Surveyor

Gerhard Ertl's mapping of chemical landscapes landed him the 2007 Nobel Prize in Chemistry

December 3, 2007

Nuclear Pore Complex

Movie shows that the nuclear pore complex is composed of protein-based substructures of various types—outer rings, inner rings, membrane rings, linker nucleoporins, and FG (phenylalanine-glycine) nucleoporins. Pore membrane is gray.

From Article »

Probing Large Protein Systems

Approach yields first detailed analysis of 456-protein nuclear pore complex.

November 26, 2007

Ready, Aim, Fire

The properties of tungsten-tin bullets mimic those of traditional lead ammunition.

From Article »

Getting The Lead Out Of Bullets

Ammunition: Tungsten-tin composite provides alternative for hunters.

November 12, 2007

Hiding In Plain Sight

A spooked octopus sheds its disguise.

From Article »

Hide And Seek

Cephalopod camouflage inspires materials research.

From Article »

New Mass Spec Technique

Method eliminates need for sample preparation.

October 24, 2007

Carbon Nanotube

From Article »

Tuning In With A Nanotube

Carbon nanotube is employed as an AM radio demodulator.

October 22, 2007

The Next Best Thing

The inmates in chemistry class at California's San Quentin State Prison didn’t have access to live demonstrations. Instead, volunteer instructor Chip Crawford, a grad student at University of California, Berkeley, taped several experiments done by chemistry instructors at UC Berkeley and showed the video clips in class.

From Article »

Chemistry Behind Bars

While balancing equations, inmates at San Quentin learn to balance their lives.

October 22, 2007

Colorful Colloids

Subjecting a suspension of magnetic colloidal clusters to a magnetic field causes the clusters to assemble into a photonic crystal, which diffracts visible light. Adjusting the distance between the magnet and the sample changes the strength of the magnetic field applied to the sample, which alters the crystal structure and hence the wavelength (color) of the diffracted light.

From Article »

Magnetic Route To Photonic Crystals

Method yields tunable materials that diffract visible light selectively.

September 17, 2007

Shipworm

This video highlights the journey of nitrogen from the atmosphere into the shipworm via bacterial nitrogen fixation.

From Article »

Viewing Microbial Metabolism

Mass spec paints a picture of nitrogen fixation by individual bacteria in animal cells.

July 30, 2007

Pulling Action

Helicase travels one base pair at a time along DNA, building up so much tension after three steps that the DNA unwinds three base pairs at a time.

From Article »

Pulling Apart DNA

July 23, 2007

Hoping to Make the Cut

In April, Hopewell Valley Central High School junior Trevor Saunders became the first blind student to qualify for participation in the International Chemistry Olympiad. Watch Saunders complete the lab portion of the exam.

From Article »

Seeing the Possibilities

Blind chemistry students get a taste of independence in the lab

May 28, 2007

Quads In Motion: Video 1

Quads In Motion: Video 2

Predicted telomeric G-quadruplex flexibility and movement are illustrated in these combined principal component analysis and molecular dynamics simulations.

From Article »

Ascent Of Quadruplexes

Nucleic acid structures become promising drug targets.

May 21, 2007

Go With The Flow

Using a novel spintronic device with a pair of ferromagnetic spin filters that sandwich a silicon substrate, Delaware researchers are able to detect and control a flow of electron spins through silicon.

From Article »

Silicon-Based Spintronics

Study demonstrates flow of electron spin in workhorse material.

February 26, 2007

Transmission Electron Microscope Video 1

Transmission electron microscope video shows conformational changes in a carborane molecule bearing two alkyl chains that is confined inside a carbon nanotube 1.2 nm in diameter.

From Article »

Molecular Close-Up

Images show motions of single, confined molecule.

February 26, 2007

Transmission Electron Microscope Video 2

TEM video shows conformational changes in a carborane molecule bearing two alkyl chains that is wobbling inside a carbon nanotube 1.3 nm in diameter. The molecule appears to be attached to a defect in the nanotube wall.

From Article »

Molecular Close-Up

Images show motions of single, confined molecule.

February 26, 2007

Transmission Electron Microscope Video 3

A carborane bearing two alkyl chains moves left, then right, along the length of a carbon nanotube over a period of about 60 seconds.

From Article »

Molecular Close-Up

Images show motions of single, confined molecule.

February 19, 2007

Translation Movie

Movie, based on structural work in many laboratories, shows the process of mRNA-to-protein translation, including initiation, protein chain elongation, and termination.

From Article »

Protein Factory Reveals Its Secrets

Researchers picture and poke the ribosome to learn how it works.

February 19, 2007

Molecular Spring Movie

When tRNA enters the ribosome's A site, it acts like a molecular spring, first distorting to fit into the available space and then returning to its native shape.

From Article »

Protein Factory Reveals Its Secrets

Researchers picture and poke the ribosome to learn how it works.

February 19, 2007

Elongation Cycle of Protein Biosynthesis

Movie of the ribosome's elongation cycle, in which a growing peptide chain is elongated by addition of one amino acid, is based in part on cryo-electron microscopy studies of ribosome-ligand complexes.

From Article »

Protein Factory Reveals Its Secrets

Researchers picture and poke the ribosome to learn how it works.

February 19, 2007

Molecular Ratchet Motion

Movie shows how the small subunit of the ribosome rotates with respect to the large subunit and how both subunits reorganize structurally during translocation, the process in which tRNAs move to adjacent sites and mRNA progresses by the length of one codon.

From Article »

Protein Factory Reveals Its Secrets

Researchers picture and poke the ribosome to learn how it works.

February 19, 2007

tRNA

Movie shows tRNA (yellow) entering the ribosome for protein translation.

From Article »

Protein Factory Reveals Its Secrets

Researchers picture and poke the ribosome to learn how it works.

February 19, 2007

Hijacking

Retroviruses travel from infected cells (yellow) to healthy ones (green) along filopodia bridges.

From Article »

HIV Takes A Punch

Clearer picture of how antibodies bind to HIV surface protein could lead to vaccine

February 19, 2007

Expansion

This cartoon shows how retroviruses like HIV might spread from one infected cell to others in the human body over filopodia bridges.

From Article »

HIV Takes A Punch

Clearer picture of how antibodies bind to HIV surface protein could lead to vaccine

February 12, 2007

Before

This 12-week-old mouse that has been altered so that the MeCP2 gene expression is blocked is showing the neurological symptoms of Rett syndrome. Note low stance, inertia, tremor, arrhythmic breathing, splayed hind-limb position and moderate hind-limb clasping.

After

The same mouse, now active and looking healthy, is shown four weeks later after receiving therapy to reactivate the MeCP2 gene expression.

From Article »

Undoing Brain Damage

Treatment cures mice of Rett syndrome.

January 29, 2007

Spider Romance

UV is an essential part of the jumping spider's mating game

From Article »

Spider Seduction Requires UV Light

Sex-specific use of UV light to seek out a mate is a first.

January 22, 2007

A Molecule Carrier

January 22, 2007

Spacecraft Trajectory

The Stardust spacecraft followed this orbit as it caught up with comet Wild 2, then returned a capsule filled with comet particles to Earth.

From Article »

Comet Wild 2's Complex Chemistry

Particles and gas harvested during Stardust mission were formed in a turbulent early solar system.

January 22, 2007

Stardust Capsule Reentry

This movie taken from a NASA DC-8 aircraft shows the Stardust sample return capsule entering the atmosphere in the early morning hours of Jan. 15, 2006.

From Article »

Comet Wild 2's Complex Chemistry

Particles and gas harvested during Stardust mission were formed in a turbulent early solar system.

January 15, 2007

"Get Perpendicular"

From Article »

Materials At The Movies

Professional: First Prize

January 15, 2007

"When Things Get Small"

From Article »

Materials At The Movies

Professional: Second Prize

January 15, 2007

"Stretchable Silicon"

From Article »

Materials At The Movies

Professional: Third Prize

From Article »

Materials At The Movies

Amateur: First Prize

January 15, 2007

"Material Combat"

From Article »

Materials At The Movies

Amateur: Third Prize

January 15, 2007

In Motion

Undifferentitated embryonic stem cells, genetically modified to express a fluorescent protein marker (green fluorescent protein or GFP), are seen here growing in culture. The left panel is a pseudocolor image of GFP fluorescence within the cells and the right panel is a phase-contrast image of the embryonic stem cell colony.

From Article »

Claims Under Fire

The future of embryonic stem cell research in the U.S. may hinge on the current review of key patents

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