Tiny Probes Measure Signals Inside Cells
Nanowire transistors could make better connections between the body and electronic devices.
By Katherine Bourzac
Researchers at Harvard University have made biocompatible, nanometer-scaled transistors that can be used to take highly precise electrical and chemical readings inside cells. The bioprobes are much more sensitive than the passive electrodes that have been used to make intracellular measurements in the past.
The Harvard group, led by chemistry professor Charles Lieber, is now developing more sophisticated bioelectronics that will take advantage of transistors' ability to send as well as receive electrical signals. They're also working with a tissue-engineering group to develop implantable bioelectronics that could make better connections between the body and neural prosthetics such as those that control some artificial limbs. The probes, which are based on ....
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Fig:- Cell probe: This V-shaped nanowire, shown near a cluster of cells, has a transistor at its tip. When inserted into a cell, the transistor can send and receive electrical signals. The probe is attached
topSocial Networks You Should Care About As a Web Developer
By Scott Clark
If you are a web developer, you may have brushed off social networking as a phenomenon that is dominated by teenagers and people seeking relationships. If you talk to non-developers, however, you may have realized that social networking is pervasive, and noticed that most smart businesses have embraced the phenomenon as a way to attract potential customers and interact with their current customers. In this article we'll look at the top 10 social networking sites that you should be aware of as a developer who cares about your clients' businesses.
Top 10 Social Networking Sites
To get started, let's break down the top 10 social networking sites today. In order of unique visitors, here's the list*:
1.Facebook - 133,623,529 unique visits ....
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AMD introduces new Fusion chip technology
The dawn of a new age in chip technology and computing in general could be at hand in the first half of 2011. Sound far-fetched? Well, it appears that day maybe fast approaching on the horizon, as today AMD demonstrated its new Fusion Technology chip, or the Fusion processor if you will. After the demonstration, which took place in Taiwan today at Computex 2010, it very well could put companies like Intel and Nvidia on alert that there is a new sheriff in town.
What is this Fusion technology chip, better named the Fusion processor? Well in a nutshell, AMD has combined a CPU and a powerful GPU into the same chip, something that AMD has tried to accomplish for years and now seems to ....
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Breakthrough in Blinking Molecules Phenomenon
A new paper by University of Notre Dame physicist Boldizsár Jankó and colleagues offers an important new understanding of an enduring mystery in chemical physics.
More than a century ago, at the dawn of modern quantum mechanics, the Noble Prize-winning physicist Neils Bohr predicted so-called "quantum jumps." He predicted that these jumps would be due to electrons making transitions between discrete energy levels of individual atoms and molecules. Although controversial in Bohr's time, such quantum jumps were experimentally observed, and his prediction verified, in the 1980s. More recently, with the development of single molecule imaging techniques in the early 1990s, it has been possible to observe similar jumps in individual molecules.
Experimentally, these quantum jumps translate to discrete interruptions of the continuous emission from ....
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Fig:- Fluorescence intensity measured by a single-molecule microscope sees sharp peaks at quantum dot locations. (Credit: Boldizsa?r Janko? / University of Notre Dame)
Large Scale Colorado Solar Power Plant
Cogentrix Energy will supply power to Public Service Company of Colorado from its large scale concentrating photovoltaic solar power generation facility, which is planned for construction near Alamosa, in southern Colorado and expected to be serving customers in 2012.
“The 30,000 kilowatt solar generating project will be the largest facility of its type in the world and is expected to be completed in the second quarter of 2012.
The system will produce up to 30,000 kilowatts of solar energy for the customers of Xcel Energy, providing enough electricity for approximately 6,500 homes.
The facility will be located on approximately 225 acres of land in the San Luis Valley of Colorado immediately adjacent to the existing transmission system of Xcel Energy. ”
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