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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

September 29, 2008

Chemical Explorers

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.

From Article »

Hybrid Polymers For Healing Voices

Elastin mimics could help grow new vocal cords.

September 15, 2008

Borosilicate Nanoparticles

Researchers used video microscopy to observe the synthesis of borosilicate nanoparticles.

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.

From Article »

Tiny Devices Get A Grip

Tetherless grippers grab and move wee objects

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.

From Article »

Rubber Heals Itself

Small molecules yield self-mending property

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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