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Tag: "quite" at biology news

Male elephants woo females with precise chemistry

... male emitting the pheromone. "We were certainly quite surprised" by the results, said the study's lead author, David R. Greenwood, Ph.D., associate professor in the School of Biological Sciences at the University of Auckland and scientist with the Molecular Olfaction Group at HortResearch in New Zealand...

Scientists observe how a close bond activates the immune system

... signaling over a prolonged period of time. It was quite a surprise," says Dr. Dustin. Researchers had speculated that the concentrated bull's eye structure somehow allowed T cells to maintain their state of activation. But the new work shows that it is actually the outer edge of immunological synapse that...

Stroke treatment a step closer after trial

...ients I see and to their families. "We still have quite a long way to go before we can be sure if this will be an effective treatment but the results so far are very encouraging." The trial was co-funded by the University, the charity Research into Ageing and the Medical Research Council. Dr Lorna Laywa...

Sperm stem cells closer to being like embryonic stem cells

...d than the new sperm-cell approach. "It will be quite valuable to bring this to the rat because it would enable us to generate knockout rats to do genetic studies," said Dr. Kent Hamra, assistant professor of pharmacology at UT Southwestern and lead author of the PNAS study. "It is a larger animal, it's...

Penicillin, amoxicillin: Step aside for strep throat treatment

...d off for weeks or months, as the strep germ isn't quite killed off but instead lingers in the child's body. The children also become vulnerable to much more severe infections that will demand the use of even stronger drugs later on. All the while, the still-contagious child is exposing his or her friends ...

Implantable pumps extend lives of patients too sick for transplant

...st are still in the prime of life and can still be quite productive." To be considered for the trial, pati...ents most likely to survive would be those who are quite sick, but not too sick to be beyond help. This fine line in determining which patients are optimal w...

Sahara's edge studied from ground, air and space to improve water management

... a pretty remote place and it took the ground team quite some time to reach it. The accessibility within the site was also restricted?even using four wheel drive cars, the northern part of the site could not be reached due to shallow water obstacles. In general, without the cooperation and help of local in...

Olfactory system detects pheromones that control reproduction

...or route was never suspected. In addition, we were quite surprised when we realized we could not identify a...us to rethink how mammals detect pheromones. It is quite tempting to speculate that there might be such a circuit in humans," said Dulac. "We must also rethi...

A resetting signal keeps circadian rhythm on track in Drosophila fruit flies

...ir circadian clocks and even neural mechanisms are quite conserved with mammals." "We were curious about how these brain cells stay synchronized, so we controlled the way time was ticking in individual clocks: we made the morning cells run faster and the evening cells relatively slower, and the other way ...

One small step means giant leap for spinal cord research

...ill and worked with them and 18 weeks later we saw quite a considerable improvement." Five patients, whose spinal cord injuries had taken place from two to 24 years prior to the study, completed two to five sessions per week of FES therapy. After practising with physiotherapists, the patients learned how ...

Ancient humans brought bottle gourds to the Americas from Asia

...nant theory has been that bottle gourds, which are quite buoyant and have no known wild progenitors in the ...rn gourds found in Asia, not Africa. This suggests quite strongly that the gourds that were used as containers in the Americas for thousands of years before ...

Study shows combination of immune substances to be safe

...ous side effects in patients. "Interferon can be quite toxic when used alone," says principal investigator William E. Carson, III, associate professor of surgery and associate director for clinical research at the Ohio State University Comprehensive Cancer Center. "We were initially concerned that the ...

Mouse study: New muscle-building agent beats all previous ones

...in muscle mass. But although the new agent seems quite promising, its advantage in potency also requires extra caution. "We don't know what else the new agent is affecting or whether those effects will turn out to be entirely beneficial," says Lee. Lee says they also are conducting experiments with the...

New technique puts brain-imaging research on its head

... explanations for it. What we see with the MRI is quite a bit of mechanical deformation in the front of the brain when the skull is hit from the rear. It seems to be because the brain is trying to pull away from some constraints in the front of the brain." Bayly and his collaborators can apply the level...

Scientists directly view immune cells interacting to avert autoimmunity

...ength per minute, and that much of the movement is quite directed, for example toward the dendritic cells, rather than random activity. These directed movements are followed by prolonged interaction between autoimmune T cells and dendritic cells that lead to proliferation of autoimmune cells and eventually...

Antibacterial coatings cut infection rates

...e example of soccer hooligans who on their own are quite ineffective but when they group together, can be a powerful force that creates havoc of disastrous proportions. It's the furanones that come to the rescue by irreversibly switching off the bacterial signalling mechanism. Without the signal, the bac...

Predators keep the world green, ecologists find

...f small, sapling-level plants continued to decline quite radically. And there's no question that the vegetation on these islands is just in a state of collapse." A drought that began in 2001 and reached extreme levels in 2003 has now ended the study, Terborgh reported. "By 2003, the lake level had droppe...

Infants can organise visual information at just four months

...in children", says Dr Farran. "But often there are quite different patterns. In cognitive development, small differences can cascade over time, so it's very important to get a grip on what's going on at the start and how it develops longitudinally, so we can see how the developmental trajectory grows." A...

Simple idea to dramatically improve dengue vaccinations

...al data from Dengue vaccination trials, they match quite closely. There may be other factors at work, but we appear to be explaining a significant portion of the effect that occurs in Dengue immunodominance." Immunodominance is also a problem for researchers working on vaccines for both the AIDS virus and...

K-State researchers study gene regulation in insects

...t fly has a very specific shape and a beetle looks quite different. We thought it would be a good place to start, since they also develop very differently. "Once the genes involved in segmentation were identified in other insects, we asked if they function the same as in fruit flies. If the function of th...

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