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Tag: "experiment" at biology news

Growth in the sea comes down to a struggle for iron

...icans' interest stems in part from the first SEEDS experiment in 2001. Japanese scientists had recorded the largest phytoplankton bloom of any of the iron fertilization tests conducted to that date. The question that remains unanswered is why the diatoms showed signs of nutrient stress before the iron and other...

Study Demonstrates Gene Expression Microarrays are Comparable and Reproducible

...cern. Can I trustthese results? If I redo the same experiment in one month, will I beable to compare both? The NIH recently demonstrated that microarrays experiments performed in different labs "have a high degree of reproducibility , as long as standardized protocols are carefully followed". Good news for...

Gene therapy converts dead bone graft to new, living tissue

...ansplanted skeletal graft into living tissue in an experiment involving mice. The advance, which uses gene therapy to stimulate the body into treating the foreign splint as living bone, is a promising development for the thousands of cancer and trauma patients each year who suffer with fragile and failing bone ...

Sea skate experiment sheds light on human cell transport

...ty of Chicago collaborator, Goldstein conducted an experiment with the red blood cells of skates to understand how these skinny, graceful fish can swim from salt water to fresh water. For humans, such a drastic environmental change would prompt an equally drastic physiological change: Our cells would take in to...

Automatic extraction of gene/protein biological functions from biomedical text

...ilarities and rule-based techniques. A preliminary experiment demonstrated that our method has an estimated recall of 54?4% with a precision of 91?4% for actually described functions in abstracts. When applied to the PUBMED, it extracted over 190 000 gene–GO relationships and 150 000 family–GO relationships for...

Scientists develop new color-coded test for protein folding

...eir original three-dimensional shape. In fact, the experiment showed that, when attached to gold film, cytochrom...ew months, he and his colleagues plan to re-do the experiment using other protein molecules. ...

New insight into people who 'see' colors in letters and numbers

...ported elicited specific colors. They designed the experiment so that if the synesthetes really were seeing the colors, that color perception would help them distinguish shapes such as triangles or squares formed by the graphemes. In another experiment, the researchers found that synesthetic color helped the sy...

Bird Brains Show How Trial and Error May Contribute to Learning

...cing that kind of variability." Kao began with an experiment to stimulate the region of the forebrain called LMAN (lateral magnocellular nucleus of the anterior nidopallium). In the avian brain, LMAN receives input about complex movements from the basal ganglia and forwards the information to motor neurons tha...

Agilent Technologies releases automated literature search tool for biology researchers

... and proteins. A microarray or an LC/MS-proteomics experiment can typically result in hundreds of genes and proteins of interest. Biologists can use the new plug-in to avoid the daunting task of manually searching for each gene and protein in the scientific literature and patents. "Mining past literature for i...

Love at first smell

...attractiveness of males could be increased. In the experiment none of the females being tested could see the mal...ical for the survival of future offspring. In the experiment females were fooled by the protein fragments into believing that males with insufficient MHC molecul...

World's largest rainforest drying experiment completes first phase

...surprising results of the first phase of a drydown experiment occurring in the Amazonian rainforest. From Janua...ientist with The Woods Hole Research Center, "This experiment provides researchers with a peek into the future of this majestic forest, a future that will most li...

Programmable cells: Engineer turns bacteria into living computers

...circuit to accomplish the task. "Then we can do an experiment to see if the community of cells is behaving as we desire. That is going to have a tremendous number of applications." ...

CoPub Mapper: mining MEDLINE based on search term co-publication

...1 differentially expressed genes from a microarray experiment were analyzed with CoPub Mapper, which resulted in several relevant clusters of genes with biological process and disease keywords. In addition, all genes versus keywords were hierarchical clustered to reveal a complete grouping of published genes ba...

Study: 'homemade' gene expression technology unreliable

...ent that a similar result would be obtained if the experiment is repeated elsewhere," Spencer said. Gene chips contain tens of thousands of tiny droplets containing a cell's whole gene sequences that are laid out on a single microscope slide by fast-moving robotic machines. Scientists determine how the express...

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

...ysician, to oversee the most sophisticated seismic experiment to date--an elaborate field study funded by Stanfo...989, Payne and her colleagues conducted a landmark experiment at a waterhole in Etosha demonstrating that these powerful infrasonic rumbles contain specific messa...

Double triumph in stem cell quest

...s an adult cell and an egg, and because in Hwang's experiment both came from the same person, it was difficult to prove the embryo really was cloned (New Scientist, 21 February 2004, p 6). The process was also very inefficient, taking 242 eggs to create just one ESC line. Now Hwang has created 11 more ESC line...

Scientists discover that three overlapping signals in embryo help get the backbone right

... them to form back structures. What clinched their experiment was taking the organizer from one embryo - in thei...ng its activity by repeating Spemann and Mangold's experiment but injecting noggin instead of implanting an organizer from another embryo. They also discovered xn...

One gene links newborn neurons with those that die in diseases such as Alzheimer's

...eurons thus have a chance of surviving. In another experiment the scientists allowed male finches to sing to a female before analyzing the birds' brain neurons. As predicted, the expression of UCHL1 in replaceable neurons, but not in nonreplaceable ones, increased in birds that were singing. "These findings su...

The lopsided brain: Attention bias is shared by humans and birds

...howed a considerable leftward bias in pecking. The experiment is similar in concept to those that reveal pseudoneglect in humans--so-called cancellation tasks in which subjects are asked to "cancel-out" evenly distributed visual targets on a sheet of paper placed before them. The finding that birds also exhibi...

The circadian clock: Understanding nature's timepiece

... making the right decisions." Antle also hopes to experiment further with a technique that involves resetting the circadian clock by altering serotonin levels, the same neurotransmitter that the anti-depressant Prozac targets. He says it could one day be possible to move people ahead eight hours simply with a ...

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