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Tag: "experiment" at biology news

LSD treatment for alcoholism gets new look

...cted in 1962, 65 per cent of the alcoholics in the experiment stopped drinking for at least a year-and-a-half (the duration of the study) after taking one dose of LSD. The controlled trial also concluded that less than 25 per cent of alcoholics quit drinking for the same period after receiving group therapy, an...

'Failed' experiment yields a biocontrol agent that doesn't trigger antibiotic resistance

MADISON - A failed experiment turned out to be anything but for bacteriologist Marcin Filutowicz. As he was puzzling out why what should have been a routine procedure wouldn't work, he made a discovery that led to the creation of a new biological tool for destroying bacterial pa...

The power of one: A simpler, cheaper method for cell fusion

...ur technology many more scientists will be able to experiment with the procedure. I believe that could open up a lot of exciting research opportunities." Lu demonstrated the efficacy of his device using Chinese hamster ovary cells, which were chemically engineered to link prior to fusion. He said his technol...

Edible coatings will be the packaging of the future

...aspect and their properties. At the same time, the experiment was used to incorporate nisine, an antioxidant agent that penetrates the foodstuff little by little and thus offers an ongoing protection. The idea was to extend the conservation time for a chicken breast would go from the current 7 days to 15, but t...

Global changes alter the timing of plant growth, scientists say

...ution's Department of Global Ecology conducted the experiment in about two fenced-off acres of the 1,189-acre Jasper Ridge Biological Preserve. The experiment was designed to simulate environmental conditions within the range that climate experts predict may ...

Transplanted photoreceptor precursor cells restore visual function in mice with retinal degeneration

...ome highly specialized neurons. Although the experiment has implications for human eye diseases that dim the sight of millions of people, Swaroop anticipates that several years of research using animal models and cell culture systems will still be needed before transplantation can be considered ready for ...

British cattle give TB to badgers, finds UC Davis expert

...s when badgers were culled as part of a seven-year experiment conducted by the British Department for Environment, Food and Rural Affairs. Conventional wisdom suggested that this should reduce transmission among badgers, as well as from badgers to cattle. Instead, after four years of culling, infection rates in...

Chronic jet-lag conditions hasten death in aged mice

...chedule "advancers" did more poorly in the present experiment than did "delayers." Notably, the researchers found that chronic stress--as measured by daily corticosterone levels--did not increase in the old mice experiencing the light-cycle shifts. The underlying cause of the increased mortality is not yet c...

Novel experiment documents evolution of genome in near-real time

...firm, to identify changes that occurred during the experiment in the bacterium's complete set of genes. In a p...g when a light bulb burns out. But we repeated the experiment more than 50 times and mutations in the RNA polymerase gene appeared again and again." The resear...

Trying to control pain can be a double-edged sword, say scientists

...e its effects." Dr Wiech and her team set up an experiment to investigate how people cope with pain. In the first stage, volunteers were given an electric stimulus to the backs of their hands and told that they could stop the pain at any point. In the second stage, they were told that the decision to stop th...

Microbes compete with animals for food by making it stink

...d the bait, researchers also repeated the trapping experiment in the marsh, but used newly thawed fish, fish soaked in antibiotic treated water and fish aged without antibiotics. They found that both freshly thawed bait and aged, antibiotic-treated bait attracted animals more frequently than traps containing ag...

The great escape -- fleeing fish fall in line

...nked according to the timing of their escape. The experiment was performed ten times at 10 minute intervals on a total of seven separate schools of grey mullet. Interestingly, results suggested that there is a trend for individual fish to maintain a given rank, indicating that the chronological order of escap...

Overfishing large sharks impacts entire marine ecosystem, shrinks shellfish supply

... challenge. "This is the first published field experiment to demonstrate that the loss of sharks is cascading through ocean ecosystems and inflicting collateral damage on food fisheries such as scallops," says Ellen Pikitch, a professor at the University of Miami Rosenstiel School of Marine and Atmospheric ...

The influence of the menstrual cycle on the female brain

...der to answer this question, the team developed an experiment using functional Magnetic Resonance Imaging (fMRI)... differences of reward system activation, the same experiment was carried out on a male group. Result: when men anticipate rewards, they mainly activate a region ...

Fish can determine their social rank by observation alone, study finds

...dition of the journal Nature, is based on a unique experiment with cichlids (SIK-lids), small territorial fish f...n advance who to pick a fight with." The Nature experiment was designed by lead author Logan Grosenick, a graduate student in statistics at Stanford, and Trici...

Too much of a good thing? Excess nutrients or water limit biodiversity

...ctivity of a few species, according to a grassland experiment conducted by University of Minnesota researchers. The reduction in species diversity occurs because increasing the amounts of limiting resources, such as nitrogen and water, makes an ecosystem more homogeneous and consequently reduces the number of...

In presence of fragrant cleaning products, air purifiers that emit ozone can dirty the air

...s Ahmad Alshawa and Ashley Russell conducted their experiment in a sparsely furnished office with a floor area of about 11 square meters. They placed an ozone-emitting air purifier in the middle of the room along with a large fan to better mix the air. At timed intervals, limonene vapor was injected in the room...

Birds found to plan for the future

... food the rest of the day. On the sixth day of the experiment they were suddenly given whole pine nuts suitable ... following morning in that compartment. Another experiment showed that the birds were able to plan ahead to provide themselves with a more varied diet. The jay...

Tiny clue reveals new path toward heart disease

...d those without. The researchers repeated the same experiment in four additional patient populations, scanning the DNA of a total of 4,000 individuals, and turned up the same result. "This finding opens up a whole new area of study for looking at risks of cardiovascular disease," said senior study investiga...

Active ingredient in common Chinese herb shown to reduce hypertension

...g/ml. After the application of tanshinone IIA, the experiment was continued for an additional 60-minute period in order to measure arteriolar diameter and peri-arteriolar nitric oxide concentration. Results Tanshinone IIA was found to have significantly reduced blood pressure in the hamsters. The experi...

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