ScienceDaily: Top Technology News

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• Got flow cytometry? All you need is five bucks and a cell phone
• More powerful 'lab-on-a-chip' made for genetic analysis
• Researchers graft olfactory receptors onto nanotubes
• Engineers develop one-way transmission system for sound waves
• Self-healing, self-cooling, metamaterials: Vascular composites enable dynamic structural materials
• Modeling plant metabolism to optimize oil production
• Biological interface using piezotronics: Nanowires allow electrical signals to be produced from mechanical actions
• Enceladus rains water onto Saturn
• Hubble constant: A new way to measure the expansion of the universe
• Elliptical galaxies are not dead
• Nano sensor detects minute traces of plastic explosives: Scientists enable inexpensive, reliable checks for explosives

Got flow cytometry? All you need is five bucks and a cell phone Posted: 26 Jul 2011 04:01 PM PDT Researchers have demonstrated the integration of an imaging cytometry and florescent microscopy on a cell phone using a compact, light-weight and cost-effective optofluidic attachment. The cell phone enabled optofluidic imaging flow cytometer could be used for rapid and sensitive imaging of bodily fluids for conducting various cell counts or rare cell analysis.

More powerful 'lab-on-a-chip' made for genetic analysis Posted: 26 Jul 2011 01:35 PM PDT Researchers have invented a silicone chip that could make genetic analysis far more sensitive, rapid, and cost-effective by allowing individual cells to fall into place like balls in a pinball machine. The device -- about the size of a nine-volt battery -- allows scientists to simultaneously analyze 300 cells individually by routing fluid carrying cells through microscopic tubes and valves. By facilitating such "single-cell analysis," the device could accelerate genetic research and hasten the use of far more detailed tests for diagnosing cancer.

Researchers graft olfactory receptors onto nanotubes Posted: 26 Jul 2011 10:24 AM PDT Researchers have developed a nanotech device that combines carbon nanotubes with olfactory receptor proteins, the cell components in the nose that detect odors.

Engineers develop one-way transmission system for sound waves Posted: 26 Jul 2011 10:24 AM PDT While many hotel rooms, recording studios, and even some homes are built with materials to help absorb or reflect sound, mechanisms to truly control the direction of sound waves are still in their infancy. However, researchers have now created the first tunable acoustic diode -- a device that allows acoustic information to travel only in one direction, at controllable frequencies.

Self-healing, self-cooling, metamaterials: Vascular composites enable dynamic structural materials Posted: 26 Jul 2011 10:23 AM PDT Researchers have developed vascularized structural composites, creating materials that are lightweight and strong with potential for self-healing, self-cooling, stealth and more. The team developed a class of sacrificial fibers that degrade after composite fabrication, leaving hollow vascular tunnels that can transport liquids or gases through the composite.

Modeling plant metabolism to optimize oil production Posted: 26 Jul 2011 08:11 AM PDT Scientists have developed a computational model for analyzing the metabolic processes in rapeseed plants -- particularly those related to the production of oils in their seeds. Their goal is to find ways to optimize the production of plant oils that have widespread potential as renewable resources for fuel and industrial chemicals.

Biological interface using piezotronics: Nanowires allow electrical signals to be produced from mechanical actions Posted: 26 Jul 2011 07:17 AM PDT Taking advantage of the unique properties of zinc oxide nanowires, researchers have demonstrated a new type of piezoelectric resistive switching device in which the write-read access of memory cells is controlled by electromechanical modulation.

Enceladus rains water onto Saturn Posted: 26 Jul 2011 07:17 AM PDT The Herschel space observatory has shown that water expelled from the moon Enceladus forms a giant torus of water vapor around Saturn. The discovery solves a 14-year mystery by identifying the source of the water in Saturn's upper atmosphere.

Hubble constant: A new way to measure the expansion of the universe Posted: 26 Jul 2011 07:17 AM PDT Using a measurement of the clustering of the galaxies surveyed, plus other information derived from observations of the early universe, researchers have measured the Hubble constant with an uncertainly of less than 5 percent. The new work draws on data from a survey of more than 125,000 galaxies.

Elliptical galaxies are not dead Posted: 26 Jul 2011 06:31 AM PDT Initial results from research carried out as part of the Atlas3D project on two elliptical galaxies could, if they are confirmed, call into question the current model of the formation of galaxies.

Nano sensor detects minute traces of plastic explosives: Scientists enable inexpensive, reliable checks for explosives Posted: 26 Jul 2011 06:29 AM PDT Materials scientists in Germany have developed an extremely sensitive explosives sensor that is capable of detecting even slight traces of the high-explosive chemical compound pentaerythritol tetranitrate (PETN). Terrorists had employed PETN in several attacks on commercial aircraft.

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