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November 10, 2008
Changes In Sound Intensity
Changes in sound intensity are barely noticeable, as this carbon nanotube thin film loudspeaker is stretched.
From Article »
Tiny Loudspeakers
Flexible, stretchable carbon-nanotube-based devices emit sound via thermoacoustic effect
November 10, 2008
Nanotube-Based Speaker With An Ipod
Measuring just 8 cm by 14.5 cm, this nanotube-based speaker plays music from an iPod beneath it.
From Article »
Tiny Loudspeakers
Flexible, stretchable carbon-nanotube-based devices emit sound via thermoacoustic effect
November 10, 2008
Nanotube-Based Speaker Attached To A Flag
The flexible nanotube-based speaker plays music while attached to a flag that's flapping in the breeze.
From Article »
Tiny Loudspeakers
Flexible, stretchable carbon-nanotube-based devices emit sound via thermoacoustic effect
November 3, 2008
Underwater Chemistry
Researchers are trying to understand the chemistry that chemosynthetic organisms depend on to live near hydrothermal vents in the primitive conditions of the deep sea.
From Article »
Employment Outlook: Extreme Chemistry
Chemists working in extreme environments mix science with adventure
From Article »
Superconductivity Rekindles
Recent discovery of new high-temperature superconductors revitalizes search for practical materials
October 6, 2008
Best Practices
ACS Career Consultant Jennifer Petoff offers networking tips for chemists.
From Article »
Networking Know-How
It's not just about finding a job, it's about building relationships
From Article »
C&EN Talks With Stephen Lyons
A television producer's take on what makes good chemistry for the small screen
September 22, 2008
Inner Workings
Vibrating natural vocal cords belonging to University of Delaware graduate student Alexandra Farran are visible as she makes different sounds. Farran was directed by speech pathologist Jennifer A. Stevenson of Christiana Hospital in Newark, Del. Stevenson works in the office of head and neck surgeon Robert Witt, a collaborator on the vocal fold tissue engineering project.
September 15, 2008
Borosilicate Nanoparticles
Researchers used video microscopy to observe the synthesis of borosilicate nanoparticles.
From Article »
Making Borosilicate Nanoparticles Is Now Possible
September 15, 2008
Grow A Home
This simulation offers an in-depth look at Plantware's proposed ecoarchitectural process.
September 1, 2008
CSB Safety Video
Death In The Oilfield
CSB Safety Video
Public Worker Safety: Wastewater Plant Explosion
From Article »
Bringing Life To Deadly Accidents
Chemical safety board finds a powerful, popular tool in animated videos of chemical plant accidents
August 28, 2008
Two simulations show the camera-iris-like opening mechanism that the bacterial ion channel MscS uses to respond to increased tension on the cell membrane.
View Looking Into The Channel Pore
Side View Of The Channel
From Article »
Camera Iris Mechanism Saves Bacteria
Complementary approaches capture ion channel in its open form
August 19, 2008
Tetherless Gripper Grabs A Microbead
The tetherless gripper, manipulated by external magnets, picks up a specific bead (red).
Tetherless Gripper Grabs Cells
The gripper grabs cells from a cell mass in a tube.
July 21, 2008
Prize Winner
High school video takes first place in an environmental film contest sponsored by Bayer
From Article »
Spreading The Joy Of Science
Bayer's worldwide educational programs show students and the public the wonder of science
From Article »
Gold Complex Changes Color Reversibly
Grinding and exposure to solvents trigger phase transformations and color changes
July 7, 2008
Programmed To Strike
The U.S. Bowling Congress used a computer-aided tracking system and a robot named Harry, shown in this video, to conduct motion studies on balls from various manufacturers. The studies resulted in a new specification on bowling ball surface roughness that will take effect in 2009.
From Article »
What's That Stuff? Bowling Balls
Knocking down pins and getting strikes with polymer science and surface chemistry
July 7, 2008
Took Only A Spark
This Chemical Safety & Hazard Investigation Board video of Barton Solvents plant's destruction explains how a tank farm explosion and fire could have been avoided with proper equipment grounding and better handling of nonconductive flammable liquids
From Article »
Static Spark Ignited Tank Farm
A static spark during a routine transfer of solvents at a chemical distribution plant led to an explosion and fire...
July 7, 2008
Follow The Green Spot
An ultraviolet-light-emitting diode creates a green cloud in a photochromic solution
From Article »
Fast Photochromism
June 23, 2008
Round And Round
Transmission electron microscope images are inherently 2-dimensional and therefore provide a limited view of 3D objects. By recording a series of images at various sample-tilt angles, researchers at Utrecht University have generated 3D renderings and a video showing a sample of cobalt oxide catalyst nanoparticles (yellow) supported on a carbon nanofiber (red) rotating through 360 degrees.
On The Move: Bent
On The Move: Cyclic
Videos recorded in a transmission electron microscope capture a lone biotinylated triamide molecule attached to a carbon nanotube-like structure undergoing conformational changes. Those motions alter the shape and appearance of the molecule, which adopts a bent configuration in one video ("Bent") and a cyclic configuration in the other ("Cyclic").
From Article »
Electron Microscopy For Chemists
Advances in imaging and elemental analysis move TEM toward the realm of analytical chemistry
June 23, 2008
The Great Escape
A molecular dynamics simulation shows the escape of nitromethane molecules placed inside a prism (purple), leaving behind an empty space. The prism and trifluoromethanesulfonate (triflate) counterions are shown as space-filling models, and nitromethane molecules outside the prism are shown as stick structures (orange).
From Article »
Molecular Cage May Contain ... Nothing
Self-assembled prisms may enclose empty spaces rather than solvent
June 18, 2008
Open And Shut Case
Simulation shows the iris-like mechanism by which the lid of the eurkaryotic chaperonin TRiC opens and closes.
From Article »
Chaperonin's Lid Works Like A Camera's Iris
Proteins lid shuts to give proteins privacy while folding inside
March 20, 2008
Remote Control: Video 1
A developing zebrafish, engineered to contain a synthetic photoswitch in its sensory neurons, doesn’t respond to nudging with a pipette tip after illumination with ultraviolet light.
Remote Control: Video 2
Shining green light on the zebrafish reverses the effect of ultraviolet light, and the fish darts away on contact with the pipette tip.
From Article »
Switches For The Body Electric
Double-bond isomerization makes new ways to control nerve impulses available
March 20, 2008
Planetary Science
An artist's rendering of a planet passing in front of a distant star.
From Article »
Extrasolar Gas Discovered
Astronomers thrilled at sighting of methane on distant planet
February 20, 2008
Atomic Force
This animation shows an atomic force microscope tip measuring the force needed to move a cobalt atom on a crystalline surface.
From Article »
Measuring Atomic Friction
Advances in atomic force microscopy allow scientists to measure single-atom forces on a surface
February 20, 2008
Put To The Test
Researcher demonstrates how the new rubber-like material can be cut, joined together, fixed, and stretched as if the break never happened.
February 7, 2008
Shape Shifter
As HIV reverse transcriptase (gray, orange, and red) changes its shape through mutation, TMC278 (green and blue) follows the changes (yellow and blue) and stays bound.
From Article »
How An Anti-HIV Drug Sidesteps Resistance
Inhibitor modifies its shape to accommodate changes in enzyme conformation.
January 14, 2008
Roundabout
Measuring the speed and direction of iodide ion leaving groups reveals an unexpected version of the SN2 reaction mechanism. An incoming chloride anion bumps the methyl group in methyl iodide on its approach. Methyl iodide spins 360 degrees before chloride substitution and ejection of iodide anion.
In Line With Tradition
In the classic SN2 reaction mechanism, chloride attacks methyl iodide from the opposite side of the iodide leaving group. The substrate then undergoes umbrella-like inversion of configuration and ejects iodide out the other side, directly along the axis of chloride's approach.
From Article »
Surprise From SN2 Snapshots
Ion velocity measurements unveil additional unforeseen mechanism.
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