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Caution urged in new method for stem cells

December 18, 2007

The stem cell wars are not over, say leading researchers at Harvard and other universities, who believe that the cloning of human embryos still represents the key to developing effective treatments for an array of horrific diseases.

Although new reprogramming techniques should yield giant advances in researching disease, they remain far too dangerous for actual treatment, rthe scientists say. The induced pluripotent stem cells made by the reprogramming process… read more

Caution over ‘computerised world’

December 29, 2003

A future where everyday objects have computer chips in them will have a dramatic effect on our lives.

The idea behind pervasive computing is that everything around us contains some sort of electronic device.

In their report, a Swiss team talks about a future where computer chips, remote sensors or radio transponders are scaled down to microscopic size and built into just about anything.

Caution advised in release of genetically modified organisms

June 8, 2001

Scientists and governments should proceed with caution as they release genetically modified organisms into the environment, according to researchers at the Ecological Society of America.

Researchers are concerned that an organism can persist without human intervention and exchange genetic material with unaltered organisms. Other concerns include creating new or more vigorous pests and pathogens, exacerbating the effects of existing pests through hybridization with related transgenic plants or animals, harm… read more

Caught up in the ‘Net

May 30, 2006

“Singularity,” the fusion of human, machine and the communication capacity of the web, may enable a spectacular and fundamental shift in our understanding of human consciousness.

“I am still a big believer in Artificial Intelligence; new software ‘shells’ that surround us as individuals and becomes our interface with the outside world,” says Diamandi. “The Internet will merge into these software shells, serving as a global nervous system interconnecting people… read more

Caught in a dragnet: facial recognition system makes error

July 19, 2011

(Credit: iStockphoto)

John H. Gass’ driver’s license was erroneously revoked after an anti-terrorism computerized facial recognition system that scans a database of millions of state driver’s license images picked his as a possible fraud.

It turned out Gass was flagged because he looks like another driver. His driving privileges were returned but, he alleges in a lawsuit, only after 10 days of bureaucratic wrangling to prove his identity.

At least… read more

Caterpillars devour cotton crops as genetic mutations confer resistance to Bt toxins

June 20, 2012

Helicoverpa_armigera_larva

Pests are adapting to genetically modified crops in unexpected ways, researchers have discovered. The findings underscore the importance of closely monitoring and countering pest resistance to biotech crops.

Resistance of cotton bollworm to insect-killing cotton plants involves more diverse genetic changes than expected, an international research team reports.

To decrease sprays of broad-spectrum insecticides, which can harm animals other than the target pests, cotton… read more

Catching Seizures Before They Occur

July 7, 2006

Researchers at MIT and Harvard are preparing to carry out trials of a new device for treating epilepsy.

It involves implanting a pacemaker-like device in the patient’s chest. Connected to the device is an electrode that wraps around the vagus nerve. It uses powerful electrical stimulations and can be activated by the patient when a seizure occurs to try to stop it.

Catalytic nanotransporters for nanotechnology applications outside biological systems

May 9, 2008
(American Chemical Society)

Pennsylvania State University chemists have built micro/nanofluidic pumps that transduce energy catalytically.

The catalytic conversion of chemical to mechanical energy is ubiquitous in biology, powering such important and diverse processes as cell division, skeletal muscle movement, protein synthesis, and transport of cargo within cells.

The chemists have demonstrated that one can build nanomotors from scratch that mimic biological motors by using catalytic reactions to create forces based on… read more

Catalyst could power homes on a bottle of water, produce hydrogen on-site

March 8, 2010

With one bottle of drinking water and four hours of sunlight, MIT chemist Dan Nocera claims that he can produce 30 KWh of electricity, which is enough to power an entire household in the developing world. With about three gallons of river water, he could satisfy the daily energy needs of a large American home.

Using the electricity generated from a 30-square-meter photovoltaic array, Nocera’s cobalt-phosphate catalyst converts water… read more

Catalyst could help turn CO2 into fuel

March 16, 2007

A new catalyst that can split carbon dioxide gas could allow us to use carbon from the atmosphere as a fuel source in a similar way to plants.

Cat brain could provide bionic eye firmware

May 22, 2008

Smith-Kettlewell Eye Research Institute researchers hope one day to develop implants that make it possible for people to see without an optic nerve, by stimulating a part of the brain called the lateral geniculate nucleus (LGN), which receives and processes visual information from the retina, via the optic nerve, before sending it on to the cerebral cortex.

The team recorded the responses of 49 individual neurons in a cat’s… read more

Cassini sees tropical lakes on Saturn moon

May produce "interesting" molecules like amino acids, the building blocks of life
June 14, 2012

cassini_titan

NASA’s Cassini spacecraft has spied long-standing methane lakes, or puddles, in the “tropics” of Saturn’s moon Titan. One of the tropical lakes appears to be about half the size of Utah’s Great Salt Lake, with a depth of at least 3 feet (1 meter).

The result, which is a new analysis of Cassini data, is unexpected because models had assumed the long-standing bodies of liquid… read more

Cassini Images Bizarre Hexagon on Saturn

March 28, 2007

An odd, six-sided, honeycomb-shaped feature circling the entire north pole of Saturn has captured the interest of scientists with NASA’s Cassini mission.

“This is a very strange feature, lying in a precise geometric fashion with six nearly equally straight sides,” said Kevin Baines, atmospheric expert and member of Cassini’s visual and infrared mapping spectrometer team at NASA’s Jet Propulsion Laboratory, Pasadena, Calif.

Cassini detects oxygen around Dione moon of Saturn

March 6, 2012

dionesaturn

NASA’s Cassini spacecraft has “sniffed” molecular oxygen ions around Saturn’s icy moon Dione, confirming the presence of a very tenuous atmosphere.

The oxygen ions are quite sparse — about 90,000 per cubic meter, showing that Dione has an extremely thin neutral atmosphere. At the surface, it would only be as dense as Earth’s atmosphere 480 kilometers above the surface.

Dione’s oxygen appears to derive… read more

Casimir force measured precisely

August 12, 2003

The latest in a series of experiments has yielded precise measurement of the Casimir force, which could make nanoscale machines behave erratically.

The Casimir force has to do with the minute pressure that real and virtual photons of light exert when they bump against an object. To manipulate light beams at the nanoscale will likely require tiny mirrors that can pivot to reflect photons down different channels.

Knowledge… read more

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