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Tag: "failed" at biology news

Research identifies protein that signals flowering in squash plants

...ap collected from these flowering C. maxima stocks failed to detect the presence of FT mRNA, but revealed the presence of FT protein in the translocation stream. This research provides some of the most solid evidence to date that FT protein acts as a florigenic signal. ...

Threats to wild tigers growing

... India, in contrast, have been mismanaged and have failed to protect the animals, according to the article. Plans to make use of tiger parts harvested from farmed tigers in China represent an emerging threat, the authors argue. Any trade in tiger parts encourages poaching, because products made from anim...

Studies to find better ways to preserve human eggs, ovarian tissue under way

...andard cryopreservation has been tried and largely failed in human eggs, says Dr. Emmi, who believes some version of vitrification likely offers a better option for ovarian tissue and eggs. In fact, many in vitro fertilization programs, including the one she directs at MCG Health System, are moving toward v...

Stroke study sheds light on left-right brain divide

... those with right-brain damage who most frequently failed to spot their errors and had difficulty keep track of the changing task rules. The group with damage to the left frontal lobes corrected 68% of mistakes in the test, whereas people with right-brain damage only made corrections to 30% of their errors....

Nurtured chimps rake it in

... hybrid tools. The captive laboratory chimpanzees failed both tests, as demonstrated in previously published work (2). According to Dr. Sarah Boysen, who led the study, “We think our findings mean that the conditions under which chimpanzees are raised, housed, and maintained have long-term effects on th...

UI anthropologist, colleagues discover remains of earliest giant panda

...h and other remains made between 1985 and 2002 had failed to establish the animal's size. Ciochon says that the ancient panda (formally known as Ailuropoda microta, or "pygmy giant panda") was probably about three feet in length, compared to the modern giant panda, which averages in excess of five feet i...

Scientists close in on missing carbon sink

...use, in relying on ground-level measurements, they failed to accurately simulate the movement of carbon dioxide vertically in the atmosphere. The models tended to move too much carbon dioxide toward ground level in the summer, when growing trees and other plants take in the gas, and not enough carbon dioxid...

Do fruit flies have free will?

...ingly complex random computer models, all of which failed to adequately model fly behavior. Only after the team analyzed the fly behavior with methods developed by co-authors George Sugihara and Chih-hao Hsieh from the Scripps Institution of Oceanography at UC San Diego did they realize the origin of the...

Genetic fingerprints identify brain tumors' origins

... aggressive," Gutmann says. Previous studies have failed to produce any solid leads on the genetic alterations that predispose children to PAs. "It should be recognized that the genetic alterations in this tumor may be very subtle," Gutmann notes. "When we looked at gene activity levels in the tumors as...

Gut research yields new anti-cancer approach

...tely, Taxol and other standard, anti-tubulin drugs failed in colorectal cancer clinical trials. Gut tumor cells have evolved to include "efflux" proteins that recognize standard chemotherapies as foreign, and "pump them out" of tumor cells. Even for breast and lung cancer, the tumor types for which Taxol is...

In obesity, brain becomes 'unaware' of fat

...SOCS-3 rose. Leptin hormone in those heavy animals failed to elicit “any element of the leptin signaling cascade.?The researchers demonstrated that those later players in the leptin pathway remained ready for action. Indeed, the downstream factors were actually found to be hypersensitive to stimulation. ...

Major gene study uncovers secrets of leukemia

... eliminates differentiated B lymphocytes that have failed to assemble the right genes to make effective antibodies against the specific target they are supposed to attack. However, if these defective B lymphocytes do not differentiate because of the mutations, the body will not recognize them as defective i...

Bisexual fruit flies show new role for neurochemical

...from or what it was doing. For years, scientists failed to identify glutamate as a key neurotransmitter precisely because there was so much of it. "It made no sense," said Featherstone. "People figured you couldn't use glutamate to send messages because there was too much glutamate background noise in ...

Migration played key role in HIV spread in South Africa

...he air passages. The study's physiologic data failed to show an association between long-term marijuana smoking and airflow obstruction (emphysema). However, all 14 studies that assessed long-term marijuana smoking and respiratory complications noted an association with increased respiratory symptoms, ...

Long-term marijuana smoking leads to respiratory complaints

...he air passages. The study's physiologic data failed to show an association between long-term marijuana smoking and airflow obstruction (emphysema). However, all 14 studies that assessed long-term marijuana smoking and respiratory complications noted an association with increased respiratory symptoms, ...

Instruction manual for creating a molecular nose

...tempts to create biosensors from membrane proteins failed due to an idiosyncrasy of these proteins: they are not water soluble. In the past, researchers tried to remove the proteins from their biological membranes by solubilising the latter using detergents. However, this destroys the natural folding struct...

Mosquito repellents that emit high-pitched sounds don't prevent bites

...f the use of electronic mosquito repellents (EMRs) failed to find any evidence that they work. The researche...n whether EMRs prevent malaria, the fact that they failed to reduce bites means that they could not reduce infection rates. ...

Intravenous nanoparticle gene therapy shows activity in stage IV lung cancer

...nt line cisplatin combination chemotherapy, which failed to halt their disease. The clinical trial continues. No maximum tolerated dose has been established, Lu says. The nanoparticle delivery system consists of a plasmid gene expression cassette loaded with DNA that encodes the FUS1 protein. This is ...

Scientists discover new virus caused deaths of transplant recipients from single donor

...ter a comprehensive state-of-the-art investigation failed to turn up leads," stated Dr. Lipkin. "We succeeded in identifying the virus responsible for the deaths by building on their work and utilizing new tools for pathogen surveillance and discovery developed in the Greene Laboratory and 454 Life Sciences...

Inhibiting blood to save the brain

... Mice expressing a mutant form of fibrinogen that failed to bind Mac-1 had fewer inflammatory lesions and less severe MS symptoms. Blocking the interaction between Mac-1 and fibrinogen after the first episode of paralysis using the fibrin peptide prevented subsequent relapses. It also prevented further m...

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