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Tag: "exposed" at biology news

Research: Snails were overlooked contributors to marsh destruction

...ened and dying patches. When these disappeared and exposed mudflats emerged, large numbers of snails moved of...rsh. Those numbers compared to almost no snails on exposed grassless mud flats, and far fewer snails in healthy marsh set back from the die-off border. The re...

Phenolic compounds may explain Mediterranean diet benefits

...l, crossover study, so that the same patients were exposed to the same oil, once with low phenolic content and the other with high phenolic content, the only variable in this study is the phenolic content of the olive oil," Dr. Badimon noted. "These results indicate that a very small change in diet, like usi...

Health of Acehnese reefs in the wake of the tsunami shows human impacts more harmful

...ima Laut, coral cover was high. In contrast, reefs exposed to destructive fishing had low coral cover and high algal cover, a change that the tsunami may exacerbate in bringing an influx of nutrients and sediments. However, the researchers found that there was no evidence to support the idea that healthy ree...

Scientists show how thinking can harm brain cells

...In laboratory studies, brain cells and slices were exposed to platelet-activating factor, or PAF, a compound that promotes inflammation and plays many roles in the brain. It can be produced by neurons and takes part in the working of synapses, including activity associated with learning and remembering. It a...

'Good' bacteria could save patients from infection infection by deadlier ones

...uld be applied to patients' tissues that are to be exposed to surgery. Admitting that his ideas may sound absurd to some, the fact is that MRSA has become widespread in hospitals - including in Israel as well as the UK -- where the most advanced antibiotics and most rigorous antiseptic measures are taken. ...

Superconducting magnet attracts molecular research

...s 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, neutrons and protons within the atom have an intrinsic property known as "spin" and within t...

UCLA scientists discover immune response to HIV differs, even in identical twins

...ntinue to live in the Los Angeles area and grew up exposed to the same environmental forces. Yet their T-cell receptors (TCR) reacted differently in each twin, showing that the body's defense response was random--and unpredictable. TCRs play an important role in the immune system by binding viruses and oth...

Alleged 40,000-year-old human footprints in Mexico much, much older than thought

...of volcanic ash deposited in a former lake bed now exposed near a reservoir outside Puebla. Its dating techniques returned a date of 40,000 years ago, in contrast to the oldest accepted human fossil from the Americas, an 11,500-year-old skull. This makes the rock "one of the most important areas in the study...

Human trial proves ricin vaccine safe, induces neutralizing antibodies; further tests planned

...s, individuals often do not know if they have been exposed until it is too late for treatment, Dr. Vitetta said. Because castor beans are readily available ?more than 50,000 tons of castor bean extract exist around the world as a byproduct of castor oil production ?public health officials warn that ricin co...

Depression model leaves mice with molecular scar

...ional Institute of Mental Health (NIMH). In mice exposed to this animal model of depression, silencer molec...isting antidepressants," explained Nestler. Mice exposed to aggression by a different dominant mouse daily for 10 days became socially defeated; they vigorou...

Contagious obesity? Identifying the human adenoviruses that may make us fat

...s. The animals were separated into four groups and exposed to either Ad-2, Ad-31, or Ad-37. There was also a control group that was not exposed to any of the viruses. The researchers measured food intake and tracked weight over three weeks befo...

Environmental tobacco smoke linked to behavior problems in children and pre-teens

.... Dr. Yolton examined 225 children and pre-teens exposed to at least five cigarettes a day. On average, the children were exposed to approximately 14 cigarettes a day. The children were enrolled in an asthma intervention study. ...

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

...ut it ?a sheep grazing in a field is not naturally exposed to highly infected brain and could only pick up ...mount of PrP from other tissues. This will then be exposed to 48 hours or more digestion before it arrives in the gut, and our experiments show that after this...

Simple idea to dramatically improve dengue vaccinations

...favorably in these cases than if it had never been exposed to the disease in the first place." Original antigenic sin, or immunodominance, arises out of the procedure the immune system uses to target infection. This starts when the immune system identifies infected cells and brings pieces of them into the l...

UC Berkeley researchers create a biologically-inspired artificial compound eye

...n epoxy resin that cures into a hardened form when exposed to ultraviolet light. They poured the resin into the dimpled molds, baked it at a low temperature just long enough to slightly harden the material, then turned out the contents: little resin hemispheres with a surface packed with 8,700 raised mounds....

Horse antibodies against the bird flu virus H5N1 are effective as treatment in mice

...itro with a lethal dose of H5N1 and simultaneously exposed the cells to horse antibodies against H5N1. Lu et ...o ?the cells simultaneously infected with H5N1 and exposed to horse antibodies did not die. Lu et al. then injected horse antibodies into 40 mice that had be...

Taking a bite out of a fellow worker helps wasps recruit new foragers

...ge. "Going off the nest to forage, where they are exposed to all kinds of stresses and dangers, is probably the biggest change these animals face in their lives," he said. O'Donnell plans future studies to learn what determines which members of a colony are doing the biting and which are being bitten. He...

Great (taste) expectations: Study shows brain anticipates taste, shifts gears

...ectancy," says Nitschke, who, with his colleagues, exposed 43 undergraduate subjects to potions of quinine, sugar water or distilled water while undergoing magnetic resonance imaging (MRI). The subjects, Nitschke explains, were asked beforehand to associate a prescribed set of cues with a taste. A "minus si...

Defective immune system response to smallpox vaccine detailed in new study

...h eczema set the stage for eczema vaccinatum. When exposed to vaccinia virus, the skin samples from healthy v...cation was poorly controlled. Next, the scientists exposed skin samples from people with atopic dermatitis to vaccinia, and then added LL-37. With the LL-37 su...

Darkness unveils vital metabolic fuel switch between sugar and fat

...A for CLPS (mClps) was found in the livers of mice exposed to prolonged dark, an unexpected finding. They r... The wild-type mice and two of the mutant strains exposed to regular light-dark cycles showed no sign of the gene's expression in their livers ?it remained in...

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