Researchers have used nanotechnology to create transparent transistors and circuits, a step that promises a broad range of applications, from e-paper and flexible color screens for consumer electronics to "smart cards" and "heads-up" displays in auto windshields.

The transistors are made of single "nanowires," or tiny cylindrical structures that were assembled on glass or thin films of flexible plastic.

"The nanowires themselves are transparent, the contacts we put on them are transparent and the glass or plastic substrate is transparent," said David Janes, a researcher at Purdue University's Birck Nanotechnology Center and a professor in the School of Electrical and Computer Engineering.

Umbilical cord blood may safely preserve insulin production in children newly diagnosed with type 1 diabetes, according to findings from a small national pilot study .

University of Florida researchers sought to determine whether it is feasible to use a patient’s own cord blood stem cells to neutralize the body’s autoimmune attack on the pancreas and help restore the organ’s ability to make insulin, which regulates how the body uses sugar and other nutrients for energy.

“This is the first attempt at using cord blood as a potential therapy for type 1 diabetes. We hope these cells can either lessen the immune system’s attack on the pancreas or possibly introduce stem cells that can differentiate into insulin-producing cells,” said pediatric endocrinologist Dr.

Researchers at UT Southwestern Medical Center have determined how a substance derived from the bark of the South American lapacho tree kills certain kinds of cancer cells, findings that also suggest a novel treatment for the most common type of lung cancer.

The compound, called beta-lapachone, has shown promising anti-cancer properties and is currently being used in a clinical trial to examine its effectiveness against pancreatic cancer in humans. Until now, however, researchers didn’t know the mechanism of how the compound killed cancer cells.

In the first scientific publication from The Genographic Project, a five-year effort to understand the human journey, researchers report their experience of genotyping human mitochondrial DNA during the first 18 months of the project.

Writing in PLoS Genetics, Doron Behar and colleagues describe the procedures used to generate, manage and analyze the genetic data from 78,590 public participants. They also provide the first anthropological insights in this unprecedented effort to map humanity’s genetic journey through the ages.

A unique study by researchers at the University of York and Hull York Medical School has confirmed a link between depression and low levels of folate, a vitamin which comes from vegetables.

In research published in the July edition of the Journal of Epidemiology and Community Health, the York team led by Dr Simon Gilbody, concluded that there was a link between depression and low folate levels, following a review of 11 previous studies involving 15,315 participants.

A synthetic version of a molecule found in the egg cells of the Northern Leopard frog (Rana pipiens) could provide the world with the first drug treatment for brain tumours.

Known as Amphinase, the molecule recognises the sugary coating found on a tumour cell and binds to its surface before invading the cell and inactivating the RNA it contains, causing the tumour to die.

Although it could potentially be used as a treatment for many forms of cancer, Amphinase offers greatest hope in the treatment of brain tumours, for which complex surgery and chemotherapy are the only current treatments.

Children suffering from pneumonia could be spared the pain of the doctor’s needle, thanks to new research funded by the British Lung Foundation.

The study, a world-first carried out by researchers at The University of Nottingham, discovered that children given oral treatment recovered as quickly, suffered less pain, required less oxygen therapy in hospital and were able to go home sooner than those given injections.

Two-and-a-half million children are affected by pneumonia each year in Europe. Until now, most children have been admitted to hospital and treated with injected antibiotics.

When white Americans were asked in a new study to pick a dollar amount they would have to be paid to live the rest of their lives as a black person, most requested less than $10,000. A minor thing.

In contrast, study participants said they would have to be paid about $1 million to give up television for the rest of their lives.

This would seem to state that white people don't think being black is such a big deal in 2007. Not the case at all, says Philip Mazzocco, co-author of a new study study and assistant professor of psychology at Ohio State University's Mansfield campus. Instead, he says the results suggest most white Americans don't truly comprehend the persisting racial disparities in our country.

Researchers at UT Southwestern Medical Center have determined how a substance derived from the bark of the South American lapacho tree kills certain kinds of cancer cells, findings that also suggest a novel treatment for the most common type of lung cancer.

The compound, called beta-lapachone, has shown promising anti-cancer properties and is currently being used in a clinical trial to examine its effectiveness against pancreatic cancer in humans. Until now, however, researchers didn’t know the mechanism of how the compound killed cancer cells.