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|SAN FRANCISCO Jordan 12 For Sale Online , Nov.1 (Xinhua) -- Researchers have developed a transparent sensor on a contact lens that may one day help type 1 diabetes patients monitor their blood glucose levels and control their insulin infusions.
With a nanostructured transistor, specifically an amorphous indium gallium oxide field effect transistor, or IGZO FET, the sensor can detect subtle glucose changes in physiological buffer solutions, such as the tear fluid in eyes.
The sensor, according to researchers at the Oregon State University College (OSU) of Engineering Jordan 11 For Sale Online , will be able to transmit real-time glucose information to a wearable pump that delivers the hormones needed to regulate blood sugar: insulin and glucagon.
The sensor and pump would act as an artificial pancreas for people with type 1 diabetes, which can lead to serious health complications unless glucose levels are carefully controlled. Problems can include retinopathy, blindness, neuropathy, kidney and cardiac disease.
"We have fully transparent sensors that are working," said Greg Herman Jordan 1 For Sale Online , an OSU professor of chemical engineering and corresponding author of a study published online in the journal Nanoscale. "What we want to do next is fully develop the communication aspect, and we want to use the entire contact lens as real estate for sensing and communications electronics."
The FET's closely packed, hexagonal, nanostructured network resulted from complimentary patterning techniques that have the potential for low-cost fabrication. Those techniques include colloidal nanolithography and electrohydrodynamic printing, or e-jet, which is somewhat like an inkjet printer that creates much finer drop sizes and works with biological materials instead of ink.
"It's an amperometric sensor and you can see the chips -- that means it has to be off to the side of the contact lens Jordan Shoes For Sale Online ," Herman was quoted as saying in a news release from OSU. "Another issue is the signal is dependent on the size of the sensor and you can only make it so small or you won't be able to get a usable signal. With an FET sensor, you can actually make it smaller and enhance the output signal by doing this."
The research builds on earlier work by Herman and other OSU engineers that developed a glucose sensor that could be wrapped around a catheter, such as one used to administer insulin from a pump. "We can integrate an array of sensors into the lens and also test for other things: stress hormones, uric acid, pressure sensing for glaucoma, and things like that. We can monitor many compounds in tears - and since the sensor is transparent Air Jordan 13 Retro For Sale , it doesn't obstruct vision; more real estate is available for sensing on the contact lens," Herman said.
"A lot of type 1 diabetics don't wear a pump," Herman noted. "Many are still managing with blood droplets on glucose strips, then using self-injection. Even with the contact lens, someone could still manage their diabetes with self-injection. The sensor could communicate with your phone to warn you if your glucose was high or low." The transparent FET sensors, he said Air Jordan 12 Retro For Sale , might ultimately be used for cancer detection, by sensing characteristic biomarkers of cancer risk. Their high sensitivity could also measure things such as pulse rate, oxygen levels, and other aspects of health monitoring that require precise control.
U.S. officials are likely to allow China's Lenovo Group to buy IBM's low-end server business and Google Inc's Motorola Mobility handset business if it agrees to concessions aimed at protecting U.S. national security, experts said.
Computer maker Lenovo has advantages over other Chinese companies that should help it overcome the mutual suspicion between the United States and China over industrial spying and cybersecurity, such as its track record of successful U.S. acquisitions in the past. And importantly Air Jordan 11 Retro For Sale , it is not directly controlled by China's government.
Even so, it could be in for a battle over its latest deals with at least one lawmaker expressing concern.
Lenovo said on Wednesday it would acquire Motorola Mobility, along with some 2,000 patents, for $2.91 billion. That news came days after an announcement the company would purchase IBM's low-end server unit for $2.3 billion.
The deals will be reviewed by the inter-agency Committee on Foreign Investment in the United States, or CFIUS Air Jordan 1 Retro For Sale , to ensure they do not threaten national security.
"We look forward to going through the regulatory process and we're going to work with the regulators with an open and transparent approach," Lenovo spokesman Brion Tingler said.
Lenovo has been through the secretive CFIUS process three times before and has won approval each time, according to a source familiar with the process.
The first was in 2005, when Lenovo bought IBM's ThinkPad business in a deal that catapulted the company into the global technology big leagues. In that case CFIUS approval came to the dismay of Representative Frank Wolf, a Republican from Virginia and a tough critic of China.
Wolf said he discovered after that approval that the State Department had made plans to purchase Lenovo computers. "They were not able to cancel the purchases but made sure that none of them were used for anything," he said.
"I just think we have to be careful Air Jordan Retro For Sale ," said Wolf.
Lenovo also went through CFIUS reviews when it bought Stoneware Inc to expand cloud solutions and formed a strategic partnership with EMC Corporation. Both deals were announced in 2012.
It is not known what security concessions - if any - CFIUS wrung out of Lenovo in the previous transactions, but typical measures include having a security officer, a security plan or other steps aimed at preventing a foreign government from influencing a company in a way that would put U.S. security at risk, the expert said.
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