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Tag: "occurs" at biology news

Superconducting magnet attracts molecular research

... on the magnetic property of an atom's nucleus. It occurs when the nuclei of certain atoms are immersed in a static magnetic field and then exposed to a second oscillating field, causing them to essentially line up and act in unison, like a battalion of marching soldiers, said Pochapsky. The electrons, ne...

Tracking the memory trace

... intriguing thing we don't understand is that this occurs only in one branch of the DPM neuron," said Davis. "Our impression now is that maybe what guides the behavior after training in the first few minutes is the antennal lobe. That is the important part that guides behavior for the small window of time a...

Scientists directly view immune cells interacting to avert autoimmunity

...d this study begins to analyze how such protection occurs in vivo, she explained. "By understanding the interplay between pathogenic cells and protective cells, we hope to be able to refine the therapy to enhance its efficacy." The microscopy technique is a vital new tool, Tang said. "The function of th...

Overfishing in inland waters reduces biodiversity and threatens health

Systematic overfishing of fresh waters occurs worldwide but is largely unrecognized because of weak reporting and because other pressures can obscure fishery declines, according to an article in the December 2005 issue of BioScience. Although the status of inland waters and their fish species s...

Stem cells from muscles can repair cartilage

...ds of bones where they meet in a joint) frequently occurs due to injury or illness, and can lead to degenerative disease. Treatments and experimental approaches to repair this articular cartilage have achieved limited results, but currently there is no method to fully restore this type of injured cartilage....

Study ties 'new' cell-death mechanism to developmental and degenerative brain disorders

... the temporal lobe and that of Parkinson's disease occurs in the substantia nigra of the brain stem. Pulst said the new findings on neurodegeneration do not necessarily supersede the prevailing hypothesis of defective proteins. In fact, the two may be linked. "It could be that the behavior of the nerve c...

New evidence questions the simple link between prion proteins and madcow disease

... keeps with the prion hypothesis is that infection occurs as PrPs are absorbed in the mouth, rather than in the gut. Dr Jeffrey, however, is not convinced by this argument. "Were infection to be acquired from the mouth then the first tissues to accumulate infectivity would be lymph nodes in the throat or t...

Simple idea to dramatically improve dengue vaccinations

... well, including HIV and cancer. Dengue infection occurs from one of four closely related viruses. Previous...ns and gradually built up a bigger picture of what occurs in Dengue immunodominance. "When faced with more than one version of the virus, the immune system m...

Ocean 'dead zones' trigger sex changes in fish, posing extinction threat

... to marine life and genetic diversity, Wu says. It occurs when excessive amounts of plant nutrients, particularly nitrogen, accumulate in oceans, freshwater lakes and other waterways. These nutrients trigger the growth of huge algae and phytoplankton blooms. As these blooms die, they sink to the ocean floor...

Rochester scientists develop fast-working biosensor

... E. coli protein called Intimin. A similar process occurs between the Tir placed on the chip and any E. coli in the sample being tested. The binding of the probe and the bacteria alters the surface of the chip. A digital camera image of the chip captures the changes for analysis and confirmation of detectio...

Researchers reverse juvenile diabetes in animal model

...ere chronic diseases of childhood. Peak incidence occurs during puberty, around 10 to 12 years of age in girls, and around 12 to 14 years of age in boys. The symptoms of type 1 diabetes can resemble the flu in children. Type 1 diabetes tends to run in families. Brothers and sisters of children with type ...

'Bad' enzymes may wear white hats after stroke

...n the cell growth and blood vessel remodeling that occurs after stroke. She also assisted with behavioral studies of rats that had received MMPs to see how well they recovered after a stroke. HHMI medical student fellows are medical students who are interested in biomedical research. The fellowships suppor...

Marijuana-like compounds suppress the immune response

..., and the central cannabinoid receptor (CB1) which occurs in the central nervous system. Recent studies have suggested that CB2 may be involved in a wide range of physiologic phenomena related to immunity, although research on this function is still at an early stage. Among the possible immunological ro...

Genetic study shows humans have pushed orangutans to the brink of extinction

...ast Bornean orangutan subspecies existing on Earth occurs in the forests of the Sabah Foundation concession, with a population of about 5,000 individuals," says Laurentius Ambu, Sabah Wildlife Department's Deputy Director. Most of these forests are exploited for timber under natural forest management, but o...

UCLA scientists find male gene in brain area targeted by Parkinson's

...rates in Parkinson's disease. Parkinson's disease occurs when cells in the substantia nigra begin to malfunction and die. These brain cells produce a neurotransmitter called dopamine that communicates with the brain areas controlling movement and coordination. As the cells die off, they produce less dopa...

Mechanism for memory revealed in neurons of electric fish

...y're digitizing their environment." But a problem occurs when the fish are close to each other. They can jam each other's electrical signals. In response, one of the fish will jump to a higher frequency to avoid the jamming signal, emitting more electrical pulses per second than its neighbor. Oestreich a...

Clues to breast cancer hidden inside stem cells

...gurdsson pointed out. Breast cancer almost always occurs in the luminal epithelial compartment, which is also where milk is produced. Perhaps it is not surprising then, that stem cells reside in this compartment. In 2002, Thorarinn Gudjonsson, successfully isolated cells from the human breast with stem ce...

U of MN researchers identify ataxia gene

...e during their lifetime. The onset of SCA5 usually occurs between the ages of 30 and 50, but can appear earlier or later in life, with reported ages of onset ranging from 4 to more than 70 years of age. Now that researchers have identified the specific mutation that causes SCA5, testing of patients at ri...

Attention shoppers: Researchers find neurons that encode the value of different goods

...ght facilitate the process of decision-making that occurs when someone chooses between different goods. "We have long known that different neurons in various parts of the brain respond to separate attributes, such as quantity, color, and taste. But when we make a choice, for example: between different food...

Lack of a key enzyme dramatically increases resistance to sepsis

...he presence of caspase-12 as a full length protein occurs in a small percentage of people of African descent...suggesting that more efficient bacterial clearance occurs in the absence of caspase-12. Caspase-12 is also an inhibitor of caspase-1, a related enzyme invo...

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