Advertisement
Biology
Subscribe to Biology

The Lead

Cloaked DNA nanodevices survive pilot mission

April 22, 2014 9:13 am | by Dan Ferber, Wyss Institute for Biologically Inspired Engineering, Harvard Univ. | News | Comments

It's a familiar trope in science fiction: In enemy territory, activate your cloaking device. And real-world viruses use similar tactics to make themselves invisible to the immune system. Now scientists at Harvard Univ.'s Wyss Institute for Biologically Inspired Engineering have mimicked these viral tactics to build the first DNA nanodevices that survive the body's immune defenses.

Study: People pay more attention to the upper half of field of vision

April 22, 2014 9:02 am | by Matt Shipman, News Services, North Carolina State Univ. | News | Comments

A new study from North Carolina State Univ. and the Univ. of Toronto finds that people pay more...

Students take clot-buster for a spin

April 22, 2014 7:46 am | Videos | Comments

In the hands of some Rice Univ. senior engineering students, a fishing rod is...

Unlocking a mystery of human disease in space

April 21, 2014 7:45 am | by Jessica Stoller-Conrad, Caltech | News | Comments

Huntington's disease is a grim diagnosis. A hereditary disorder with debilitating physical and...

View Sample

FREE Email Newsletter

Poll: Big Bang a big question for most Americans

April 21, 2014 4:21 am | by Jennifer Agiesta - Associated Press - Associated Press | News | Comments

Few Americans question that smoking causes cancer. But they express bigger doubts as concepts that scientists consider to be truths get further from our own experiences and the present time, an Associated Press-GfK poll found. Americans have more skepticism than confidence in global warming, the age of the Earth and evolution and have the most trouble believing a Big Bang created the universe 13.8 billion years ago.

Hawaii is genetically engineered crop flash point

April 19, 2014 10:20 am | by Audrey Mcavoy - Associated Press - Associated Press | News | Comments

You can trace the genetic makeup of most corn grown in the U.S., and in many other places around the world, to Hawaii. The tiny island state 2,500 miles from the nearest continent is so critical to the nation's modern corn-growing business that the industry's leading companies all have farms here, growing new varieties genetically engineered for desirable traits like insect and drought resistance.

Impact glass stores biodata for millions of years

April 18, 2014 10:22 am | by Mark Nickel, Brown Univ. | News | Comments

Bits of plant life encapsulated in molten glass by asteroid and comet impacts millions of years ago give geologists information about climate and life forms on the ancient Earth. Scientists exploring large fields of impact glass in Argentina suggest that what happened on Earth might well have happened on Mars millions of years ago. Martian impact glass could hold traces of organic compounds.

Advertisement

Pocket-sized anthrax detector aids global agriculture

April 18, 2014 8:36 am | by Stephanie Holinka, Sandia National Laboratories | News | Comments

A credit-card-sized anthrax detection cartridge developed at Sandia National Laboratories and recently licensed to a small business makes testing safer, easier, faster and cheaper. Bacillus anthracis, the bacteria that causes anthrax, is commonly found in soils all over the world and can cause serious, and often fatal, illness in both humans and animals.

Multi-target TB drug could treat other disease, evade resistance

April 18, 2014 7:47 am | by Liz Ahlberg, Physical Sciences Editor, Univ. of Illinois, Urbana-Champaign | News | Comments

A drug under clinical trials to treat tuberculosis could be the basis for a class of broad-spectrum drugs that act against various bacteria, fungal infections and parasites, yet evade resistance, according to a study by Univ. of Illinois chemists and collaborators. The team determined the different ways the drug SQ109 attacks the tuberculosis bacterium and how the drug can be tweaked to target other pathogens from yeast to malaria.

Proper stem cell function requires hydrogen sulfide

April 17, 2014 3:02 pm | by Beth Newcomb, USC | News | Comments

A new study has discovered that stem cells in bone marrow need to produce hydrogen sulfide in order to properly multiply and form bone tissue. The presence of hydrogen sulfide produced by the cells governs the flow of calcium ions, which activates a chain of cellular signals that results in osteogenesis, or the creation of new bone tissue, and keeps the breakdown of old bone tissue at a proper level.

The trials of the Cherokee were reflected in their skulls

April 17, 2014 12:00 pm | by Matt Shipman, News Services, North Carolina State Univ. | News | Comments

From far away, the top of a leaf looks like one seamless surface; however, up close, that smooth exterior is actually made up of a patchwork of cells in a variety of shapes and sizes. Interested in how these cells individually take on their own unique forms, a team sought to pinpoint the shape-controlling factors in pavement cells, which are puzzle-piece-shaped epithelial cells found on the leaves of flowering plants.

Bionic ankle “emulates nature”

April 17, 2014 7:41 am | by Rob Matheson, MIT News Office | News | Comments

These days, Hugh Herr, an assoc. prof. of media arts and sciences at Massachusetts Institute of Technology, gets about 100 emails daily from people across the world interested in his bionic limbs. Messages pour in from amputees seeking prostheses and from media outlets pursuing interviews. Then there are students looking to join Herr’s research group.

Advertisement

New technique will accelerate genetic characterization of photosynthesis

April 16, 2014 9:12 am | News | Comments

A type of single-cell green algae called Chlamydomonas reinhardtii is a leading subject for photosynthesis research, but few tools are available for characterizing the functions of its genes. A team including Carnegie Institution's Martin Jonikas has developed a highly sophisticated tool that will transform the work of plant geneticists by making large-scale genetic characterization of Chlamydomonas mutants possible for the first time.

Potent, puzzling and (now less) toxic: Team discovers how antifungal drug works

April 15, 2014 5:18 pm | by Diana Yates, Univ. of Illinois | News | Comments

Scientists have solved a decades-old medical mystery, and in the process have found a potentially less toxic way to fight invasive fungal infections, which kill about 1.5 million people a year. The researchers say they now understand the mechanism of action of amphotericin, an antifungal drug that has been in use for more than 50 years even though it is nearly as toxic to human cells as it is to the microbes it attacks.

Characterizing Liposomes for Drug Delivery

April 15, 2014 9:38 am | by Pauline Carnell, Senior Application Scientist and Mike Kaszuba, Technical Support Manager, Malvern Instruments, Malvern, U.K | Articles | Comments

When considering potential drug delivery vehicles, liposomes are an important option and have already been approved for use with a number of therapeutic formulations. Liposomes are comprised of phospholipids and may be single- or multi-layered, can be produced in different sizes and have a hydrophilic interior and hydrophobic shell. They are biodegradable, non-toxic and capable of encapsulating both hydrophilic and hydrophobic materials.

Life Sciences Chrome

April 15, 2014 9:04 am | by Lindsay Hock, Managing Editor | Thermo Fisher Scientific, Agilent Technologies Inc. | Articles | Comments

Driven by rapid growth in forensics, biotechnology, disease diagnostics and environmental regulations, chromatography systems have become a laboratory staple. Used for the separation of complex mixtures, detection of illicit drugs and the production of pharmaceuticals, the biotechnology and pharmaceutical industries are the prime users of chromatography techniques.

New finding on the dual role of carbon dioxide in photosynthesis

April 14, 2014 10:03 am | News | Comments

It is well known that inorganic carbon in the form of carbon dioxide, CO2, is reduced in a light driven process known as photosynthesis to organic compounds in the chloroplasts. Less well known is that inorganic carbon also affects the rate of the photosynthetic electron transport. Researchers in Sweden have recently found that its ionic form bicarbonate, has a regulating function in the splitting of water in photosynthesis.

Advertisement

Study to measure gravity’s effects on plant cells in space

April 11, 2014 7:53 am | by Natalie van Hoose, Purdue Univ. | News | Comments

A Purdue Univ. experiment that will test how plant cells sense and respond to different levels of gravity is scheduled to launch aboard the SpaceX Falcon 9 rocket from Cape Canaveral, Fla., on Monday (April 14). Understanding how gravity impacts plants is key for determining the conditions necessary to grow plants in space.

Researchers using math to whittle away at jet lag

April 10, 2014 5:22 pm | by Lauran Neergaard - AP Medical Writer - Associated Press | News | Comments

Lots of apps claim they can help you fight jet lag. Now Michigan researchers say mathematical formulas suggest it's possible to adjust to new time zones a bit faster than previously thought, and they created their own free app to help. Doctors have long said exposure to light is key. But how much, and when?

Promising agents burst through superbug defenses to fight antibiotic resistance

April 10, 2014 9:02 am | News | Comments

In the fight against “superbugs,” scientists have discovered a class of agents that can make some of the most notorious strains vulnerable to the same antibiotics that they once handily shrugged off. Recently discovered metallopolymers, when paired with the same antibiotics MRSA normally dispatches with ease, helped evade the bacteria’s defensive enzymes and destroyed its protective walls, causing the bacteria to burst.

Scientists firm up origin of cold-adapted yeasts that make cold beer

April 10, 2014 8:35 am | by Terry Devitt, Univ. of Wisconsin-Madison | News | Comments

As one of the most widely consumed and commercially important beverages on the planet, one would expect the experts to know everything there is to know about lager beer. But it was just a few years ago that scientists identified the South American yeast that somehow hitched a ride to Bavaria and combined with the domesticated Old World yeast used for millennia to make ale and bread to form the hybrid that makes lager or cold stored beer.

The motion of the medium matters for self-assembling particles

April 10, 2014 8:16 am | by Evan Lerner, Univ. of Pennsylvania | News | Comments

By attaching short sequences of single-stranded DNA to nanoscale building blocks, researchers can design structures that can effectively build themselves. The building blocks that are meant to connect have complementary DNA sequences on their surfaces, ensuring only the correct pieces bind together as they jostle into one another while suspended in a test tube.

Synthetic collagen promotes natural clotting

April 10, 2014 8:04 am | News | Comments

Synthetic collagen invented at Rice Univ. may help wounds heal by directing the natural clotting of blood. The material, KOD, mimics natural collagen, a fibrous protein that binds cells together into organs and tissues. It could improve upon commercial sponges or therapies based on naturally derived porcine or bovine-derived collagen now used to aid healing during or after surgery.

Noses, made in Britain: UK touts lab-grown organs

April 9, 2014 3:12 pm | by Maria Cheng, AP Medical Writer | News | Comments

In a north London hospital, scientists are growing noses, ears and blood vessels in a bold attempt to make body parts in the laboratory. It's far from the only laboratory in the world that is growing organs for potential transplant. But the London work was showcased this week hints at the availability of more types of body parts, including what would be the world's first nose made partly from stem cells.

Recycling astronaut urine for energy and drinking water

April 9, 2014 3:09 pm | News | Comments

On the less glamorous side of space exploration, there’s the more practical problem of waste: in particular, what to do with astronaut pee. But rather than ejecting it into space, scientists are developing a new technique that can turn this waste burden into a boon by converting it into fuel and much-needed drinking water.

A new “hope” for preservation of tissue samples for analysis

April 8, 2014 12:12 pm | News | Comments

Researchers have discovered that the so-called HOPE method allows tissue samples to be treated such that they do not only meet the requirements of clinical histology, but can still be characterized later on by modern methods of proteomics, a technique that analyzes all proteins at once. This differs from the traditional formalin-based approach that cross-links protein molecules.

New model combines multiple genomic data

April 8, 2014 10:53 am | by David Orenstein, Brown Univ. | News | Comments

Data about DNA differences, gene expression or methylation can each tell epidemiologists something about the link between genomics and disease. A new statistical model that can integrate all those sources provides a markedly improved analysis, according to two new papers.

Synthetic gene circuits pump up cell signals

April 8, 2014 7:56 am | News | Comments

Synthetic genetic circuitry created by researchers at Rice Univ. is helping them see, for the first time, how to regulate cell mechanisms that degrade the misfolded proteins implicated in Parkinson’s, Huntington’s and other diseases. The Rice team has designed a sophisticated circuit that signals increases in the degradation of proteins by the cell’s ubiquitin proteasome system (UPS).

How coughs and sneezes float farther than you think

April 8, 2014 7:42 am | by Peter Dizikes, MIT News Office | News | Comments

The next time you feel a sneeze coming on, raise your elbow to cover up that multiphase turbulent buoyant cloud you’re about to expel. That’s right: A novel study by Massachusetts Institute of Technology researchers shows that coughs and sneezes have associated gas clouds that keep their potentially infectious droplets aloft over much greater distances than previously realized.

X
You may login with either your assigned username or your e-mail address.
The password field is case sensitive.
Loading