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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.
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.
October 29, 2007
Mass Spectrometry
Part 1: Cutting The Wafer
Part 2: Washing And Drying
Part 3: Assembling The Teflon Cell
Part 4: After Etching
Part 5: After Etching (cont'd)
Part 6: Adding The Initiator Compound
Part 7: Removing The Excess Derivatizing Agent
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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.
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.
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.
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.
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.
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 »
Spider Seduction Requires UV Light
Sex-specific use of UV light to seek out a mate is a first.
From Article »
'Walking' Molecules Carry CO2
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
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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