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3-D microscopic views of tiny mouse brains available online

A multi-institutional consortium including Duke University has created startlingly crisp 3-D microscopic views of tiny mouse brains - unveiled layer by layer - by extending the capabilities of conventional magnetic resonance imaging.

10 Jul 2007

Magnetic nano tweezers show how cancer drug works

The annoying bulges of an over-wound telephone cord that shorten its reach and limit a caller's motion help to explain why drugs called camptothecins are so effective in killing cancer cells, according to investigators at St. Jude Children's Research Hospital and Delft University of Technology.

10 Jul 2007

Rapid evolution of defense genes in plants may produce hybrid incompatibility

One of the basic tenets of evolution is speciation in which populations of the same species become so genetically and morphologically variable that they can be classified as two different species.

10 Jul 2007

Ownership of genetic information

We all share our genetic make up with relatives, but should we also share ownership of the results of DNA analysis or should this knowledge be considered private?

9 Jul 2007

Ancient DNA suggests earth was warmer than previously believed

A team of international researchers has collected the oldest ever recovered DNA samples and used them to show that Greenland was much warmer at some point during the last Ice Age than most people have believed.

9 Jul 2007

NanoSIMS instrument clarifies nutrient cycle

Scientists at the University of Southern California have applied a nanoscale imaging method to a biological system, helping to clear up an old puzzle of the global carbon and nitrogen cycle.

9 Jul 2007

Engineered blood vessels work like native tissue

Blood vessels that have been tissue-engineered from bone marrow adult stem cells may in the future serve as a patient's own source of new blood vessels following a coronary bypass or other procedures that require vessel replacement, according to new research from the University at Buffalo Department of Chemical and Biological Engineering.

9 Jul 2007

Chickens orientate themselves by the Earth's magnetic field

40 years ago, Prof. Dr. Wolfgang Wiltschko was the first to prove that migrating robins use the Earth's magnetic field to direct themselves during migration.

9 Jul 2007

Amoebae control cheating by keeping it in the family

No one likes a cheater, even a single-celled one. New research from Rice University shows how cooperative single-celled amoebae rely on family ties to keep cheaters from undermining the health of their colonies.

9 Jul 2007

Investigating life in extreme environments

From the deepest seafloor to the highest mountain, from the hottest region to the cold Antarctic plateau, environments labelled as extreme are numerous on Earth and they present a wide variety of features and characteristics.

5 Jul 2007

Scientists measure distraction

A scientific indicator of how easily distracted you are has been designed by a UCL (University College London) psychologist. It could be used as another assessment tool during the recruitment process and would have particular benefits in fields where employee distraction could lead to fatal errors.

4 Jul 2007

Human immune system in a test tube

Surgical instruments or implants that are contaminated with residual bacteria, or pyrogens, can cause blood poisoning in patients. Researchers are developing a test that imitates the human immune system in the laboratory, eliminating the need for animal experiments.

4 Jul 2007

Understanding the human journey

In the first scientific publication from The Genographic Project, a five-year effort to understand the human journey, we see the first attempts to answer these age-old questions.

29 Jun 2007

Researchers increase in vivo lifetime of nanoparticles

Researchers at the University of California, Santa Barbara have discovered that attaching polymeric nanoparticles to the surface of red blood cells dramatically increases the in vivo lifetime of the nanoparticles.

29 Jun 2007

New type of mouse embryonic stem cell discovered

Scientists have discovered a new type of mouse embryonic stem cell that is the closest counterpart yet to human embryonic stem (ES) cells, the National Institutes of Health (NIH) have announced.

28 Jun 2007

Scientists discover role of ataxia telangiectasia mutated protein in DNA repair

Scientists from the National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS), National Cancer Institute (NCI), and Integrative Bioinformatics Inc. have made an important discovery about the role of an enzyme called ataxia telangiectasia mutated protein (ATM) in the body's ability to repair damaged DNA.

28 Jun 2007

Scientists create sheets of protein-gold arrays

In groundbreaking research, scientists have demonstrated the ability to strategically attach gold nanoparticles -- particles on the order of billionths of a meter -- to proteins so as to form sheets of protein-gold arrays.

28 Jun 2007

New model for signal transduction in cells

Among the key communication systems within a cell is the Wnt signaling pathway, which regulates embryonic development and whose deregulation can also contribute to cancer development.

28 Jun 2007

Polymeric nanoparticles show potential as new method for drug delivery

28 Jun 2007

Tularemia-specific antibodies protect mice from developing respiratory tularemia

The respiratory form of tularemia, a potentially serious bacterial disease, is a significant public health concern because it is highly infectious, it has a high mortality rate if untreated, and it could be introduced into a population in an intentional act of bioterror.

28 Jun 2007