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Tag: "travel" at biology news

The secret lives of whales

... sperm whales feed in tropical regions while males travel globally and feed near the poles. “For example, of the roughly one million sperm whales killed by whalers in the Antarctic Ocean, only one was a female,?says Payne. Ocean Alliance is testing its samples for 30 different pollutants. “Some of these ar...

Experiments provide proof of how traveling in groups protects insects

... and extend 10 miles or so in length. And they can travel a mile or so a day. Why such groups of insects form has mystified humans for thousands of years. One firmly held belief was that God was punishing men and women for their sins. A more recent, scientific theory has been the "safety-in-numbers" idea -...

Experiments provide proof of how traveling in groups protects insects

... and extend 10 miles or so in length. And they can travel a mile or so a day. Why such groups of insects form has mystified humans for thousands of years. One firmly held belief was that God was punishing men and women for their sins. A more recent, scientific theory has been the "safety-in-numbers" idea -...

Probing The Promise And Perils Of Nanoparticles

... be at least as important in allowing materials to travel through membranes. The work that Banaszak Holl, Hong and Leroueil will discuss is one of several major research programs under way in the U-M Center for Biologic Nanotechnology—a multi-disciplinary group includes researchers from the Medical School,...

Open microfluidic and nanofluidic systems

...er applications include customized chips for space travel in order to monitor microbes inside spacecraft or to detect life on other planets. An obvious prerequisite for such miniaturized labs are appropriate microcompartments for the confinement of very small amounts of liquids and chemical reagents. Like ...

UCLA scientists transform HIV into cancer-seeking missile

...k of a good carrier for therapeutic genes that can travel through the blood and aim itself at a precise location, thereby minimizing harmful side effects," explained Irvin S.Y. Chen, Ph.D., director of the UCLA AIDS Institute. "Our approach proves that it is possible to develop an effective carrier and repr...

Self-assembled nano-sized probes allow Penn researchers to see tumors through flesh and skin

...ls. When exposed to near-infrared light, which can travel through tissue, the fluorophores within the polymersome respond with a bright near-infrared signal that can then be detected. "The fluorophores function like reflectors stuck in the spokes of a bicycle tire," Therien said. "When this structure absor...

Artifical cornea lets woman blind 20 years see

...ve cost of the frequent post-operative visits, the travel required, the medications and contact lenses used in follow up with the patients. For now, however, the devices are becoming more available as more doctors are trained in the procedure and care of the post-operative patient. And for people like Elma...

Norovirus, AIDS vaccine and Hepatitis Virus

... percent of the samples tested, with time spent at travel destinations playing an important role in determining infection frequency. "This study is the first of its kind to indicate that NoVs may be a major cause of illness among United States travelers who experience TD during extended stays in developing...

Probing the promise and perils of nanoparticles

... be at least as important in allowing materials to travel through membranes. The work that Banaszak Holl, Hong and Leroueil will discuss is one of several major research programs under way in the U-M Center for Biologic Nanotechnology---a multi-disciplinary group includes researchers from the Medical Schoo...

Flocking together: Study shows how animal groups find their way

...flocking birds, schooling fish or running herds to travel in unison without any recognized leaders or signaling system. The finding, published in the Feb. 3 issue of Nature, helps settle age-old questions about how animals coordinate their actions. Previously, scientists had looked for subtle signals or ot...

Robot-based system developed at Carnegie Mellon detects life in Chile's Atacama desert

... rover uses solar energy to operate so it needs to travel during daylight hours. Many times, the images we capture may only reveal a faint signal. Any sunlight that leaks in to the camera of a conventional fluorescence imager would obscure the signal," said Waggoner. "To avoid this problem, we designed our...

Infants With Rare Genetic Disease Saved by Cord Blood Stem Cells

... bone marrow, she said. Stem cells from cord blood travel to the brain more rapidly than stem cells from adult bone marrow, and cord blood stem cells repair deficiencies in both the central and peripheral nervous systems, said Kurtzberg. Thus, disease progression stabilizes about 2 to 4 months earlier in p...

Some Brain Cells 'Change Channels' To Fine-tune The Message

...ed synapses, that molecules released from one cell travel immediately to the next. These molecules dock at specific places, or receptors, on the cell and trigger "channels" in the cell's membrane to open. Depending on the receptor and the channel, in will flow sodium, calcium, chloride or other charged ato...

Live vaccines more effective against horse herpes virus

...ew York Racing Association (NYRA) on May 18 issued travel restrictions for all horses that might have been exposed to equine herpes virus, with special attention paid to those stabled at Churchill Downs since May 1. In some 90 percent of infected horses, equine herpes virus type 1 (EHV-1) leads to a mild u...

NIH Researchers Discover How Insulin Allows Entry of Glucose Into Cells

...culate just under the cell’s surface. The vesicles travel along a railroad track-like network of molecules known as microtubules. When insulin binds to the cell’s outer surface, those vesicles immediately stop moving, tether to the cell’s inner surface, then fuse with the cell membrane. GLUT 4, contained in...

Scientists journey to southern Africa to unravel the secret world of elephant communication

... atmospheric conditions, low-frequency calls could travel 6 miles or more through the air. Now in private in...do, indeed, generate measurable seismic waves that travel along the surface of the ground. In 1999, the UC-Davis team developed a mathematical model predictin...

Decoding the logic of olfaction

...ry bulb. Signals from the olfactory bulb, in turn, travel to the brain's olfactory cortex. Information from the olfactory cortex is then sent to many regions of the brain, ultimately leading to the perceptions of odors and their emotional and physiological effects. Although there are about a thousand diffe...

Genpathway and Baylor College of Medicine Identify New Genes in Breast Cancer

...ry bulb. Signals from the olfactory bulb, in turn, travel to the brain's olfactory cortex. Information from the olfactory cortex is then sent to many regions of the brain, ultimately leading to the perceptions of odors and their emotional and physiological effects. Although there are about a thousand diffe...

A little stress gives beneficial oomph! to immune system

...roops of these immune cells into motion. The cells travel to potential battle stations ?primarily the skin along with the lymph nodes that drain the skin. "Most immune challenges or wounds involve on the skin or other epithelial linings of the body," Dhabhar said. "If nothing happens immunologically follow...

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