experiment 2 7

Tag: "experiment" at biology news

Where we change our mind

...cle is that the beliefs of the subjects during the experiment could not be determined unequivocally; thus, those beliefs could not be correlated with brain function. However, the researchers' statistical analysis of the subject's navigation decisions enabled them to infer which of two "cognitive states" the su...

Beauty and the brain

...ototype and attractiveness disappeared. A third experiment ?again with abstract, random-dot images ?was performed with electrode measurements at cheek and brow muscles (to detect the formation of incipient smiles or frowns) and, without having to rely on reported ratings, confirmed a genuine positive respons...

A transplant in time

...ying the technique to humans, the Institute team's experiment is "proof of principle" ?evidence that transplanted embryonic tissue, whether human or pig, could one day help the body to overcome genetic diseases. ...

Blue eyes -- A clue to paternity

...en with the same eye color, given that the present experiment did not request participants to choose prospective sexual mates, but only to provide their aesthetic or attractiveness responses…based on face close-up photographs." Blue-eyed men may have unconsciously learned to value a physical trait that can fac...

New biochip helps study living cells, may speed drug development

...oductive crop varieties. "Instead of doing one experiment per day, as is often the case, this technology is ...used by NASA to briefly simulate zero gravity. The experiment analyzed gravity's effect on plant development, trying to solve the riddle of how a plant determines...

Wheat gene may boost foods' nutrient content

... and iron, without differences in grain size. This experiment confirmed that this single gene was responsible for all these changes." Dubcovsky said the research team was surprised to find that all cultivated pasta and bread wheat varieties analyzed so far have a nonfunctional copy of GPC-B1, suggesting that ...

Zinc plays important role in brain circuitry

...transmission of neural impulses, half a century of experiment researchers had not been able to show conclusively that the metal plays a role in normal nerve cell transmission. However, in an article in the November 22, 2006, issue of the journal Neuron, published by Cell Press, Heinrich Betz and colleagues c...

Changing length of days reverses how estrogen affects aggressiveness in mice

...s theory was true, Nelson and Trainor conducted an experiment in which they injected mice with an estrogen-like drug which attaches almost exclusively to estrogen receptor alpha, to see how it would affect aggression. The results showed that the alpha receptor played a key role in increasing aggression in sh...

Too mellow for our predatory world

...ute predation pressure responded to the harassment experiment with an immediate increase in CORT levels. "Our experiments have shown that the animals increase their flight initiation distance and are able to mount a corticosteroid stress response", explains Thomas Roedl. It seems that the function of the stre...

Single molecular 'mark' seen as pivotal for genome compaction in spores and sperm

...e team's observations, Krishnamoorthy performed an experiment in yeast in which she altered the histone's chemical composition at a single point, the point at which the molecule attaches to, or marks, the histone. The results were clear and compelling: With the alteration, the molecule was unable to attach to t...

Protein folding: Building a strong foundation

...oteins. The computational approach tested in the experiment was developed by the research group of co-author Jianpeng Ma, associate professor of bioengineering at Rice and associate professor of biochemistry and molecular biology at Baylor College of Medicine. Ma's group, which mainly focuses on multi-scale p...

'Trojan Horse' agent halts bone metastasis in mice

...enblum said To find out, Rosenblum designed an experiment with VEGF121/rGel, an agent he and his colleagues began to develop several years ago. They created the drug by fusing the smallest of VEGF proteins (VEGF 121) to a genetically engineered toxin, gelonin, derived from a plant that grows wild in India, ...

Plant-derived molecules, genetic manipulation point to future chemoprevention methods

...f both drugs. "The drugs that were fed in this experiment were apparently well tolerated, and the mice gained weight throughout the experiment," Liby said. "These studies indicate that CDDO-ME and LG100268, even as individual drugs, can delay tumor development in living organisms. But the combination of the...

Bad blood between boys and girls

...ion of this tentative conclusion by a manipulative experiment (by experimental infection of animals) is necessary." ...

Muscle and bone from an ink-jet printer

... registration to patterns. The proof-of-concept experiment led to the formation of muscle- and bone-like tissues simultaneously in the same culture dish. The long-term promise of this new technology could be the tailoring of tissue-engineered regenerative therapies. In preparation for preclinical studies, th...

Giant insects might reign if only there was more oxygen in the air

...way. Tracheae grow disproportionately This experiment was designed to find out: how much room the tracheal system takes up in the bodies of different-sized beetles whether tracheal dimensions increase proportionately as the beetles get larger whether there is a limit to the size a beetle cou...

Seals protect brain, conserve oxygen by turning off shivering response on icy dives

...e, Folkow said. Taking the plunge The seal experiment took place in a tank in which the seals took a series of experimental dives into cold water of 2-3° C. The researchers recorded shivering, heart rate, brain temperature and rectal temperature while the seals were on the surface and while they were di...

Taking 'chips' to the next level of gene hunting

...wn, again using the crossword analogy. So if their experiment lights up a horizontal row of dots, the researcher...me contained in the bottom layer; likewise, if the experiment highlights a vertical row, the data correspond to the top layer. Says Boeke, "It's so easy to dif...

Teenager moves video icons just by imagination

...puter game have gone hands-off, thanks to a unique experiment conducted by a team of neurosurgeons, neurologists, and engineers at Washington University in St. Louis. The boy, a 14-year-old who suffers from epilepsy, is the first teenager to play a two-dimensional video game, Space Invaders, using only the s...

American scientist's research of life's first cells

...n-chief of Science . "She created an evolutionary experiment among 'proto-cells' -- vesicles built of membrane materials, some of which contained RNAs functioning as enzymes whereas others did not. Some were favored competitively, demonstrating greater evolutionary fitness." Chen describes how she has used...

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