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Tag: "previous" at biology news

Some butterflies travel farther, reproduce faster

...t nutrient for egg maturation, he said. Adds to previous study Previous studies had found other physiological differences between these more robust butterflies and their status quo sisters and brothers. They found that individuals that established new populations mate sooner, lay more eggs and have a di...

Air travel and flu: Post-9/11 restrictions delayed start of season

...when international airline travel went back to its previous level. In contrast, the researchers found no delay in the 2001?002 flu season in France, where there were no flight restrictions. Although other factors may possibly have been involved, the findings suggest that air travel affects both the peak date ...

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

...artmouth University has found. Following up on previous work showing strong links between inflammation and the development of cancer, Karen Liby, Ph.D., a postdoctoral fellow, and her colleagues found that the triterpenoid CDDO-MA, currently undergoing trails for leukemia and solid tumors (sponsored by Re...

Replacing insulin is top-ranked breakthrough foreseen for health in developing world

...ic development," the authors say. "In addition, previous studies of the health biotechnology sectors in developing countries have shown that local innovation in science and technology can lead to more affordable treatments for the populations of developing countries. India's Shantha Biotechnics, for inst...

Successful lung cancer surgery not enough to break nicotine dependence in many smokers

... months after their operation. Consistent with previous research, the investigators hypothesized that greater nicotine dependence, a younger age, lower income, and a lower level of education would be associated with a greater likelihood of smoking post surgery. But that is not what they saw on two of t...

Silver bullet: UGA researchers use laser, nanotechnology to rapidly detect viruses

...phenomenon is well known, but Tripp explained that previous attempts to use Raman spectroscopy to diagnose viruses failed because the signal produced is inherently weak. But UGA physics professor Yiping Zhao and UGA chemistry professor Richard Dluhy experimented with several different metals and methods a...

Detecting microalgae in coastal waters

... algal species. The researchers will build on a previous CICEET project to develop a field stage prototype of a laser fluorometer that detects multiple target pigments and can differentiate between different types of algae. "Knowledge is power. We hope this instrument will characterize microalgal popu...

Spelling out cancer on the nanoscale

...s also tested on human lymphoma samples. In previous work, the Felsher group had shown that inactivating MYC induces sustained tumor regression in mice. The researchers decided to test their conditional model of MYC-induced lymphoma by using their nano-fluidic system to quickly measure the impact of ta...

Pressured by predators, lizards see rapid shift in natural selection

... sagrei spends much of its time on the ground, but previous research has shown that when a terrestrial predator is introduced, these lizards take to trees and shrubs, becoming increasingly arboreal over time. Losos and his colleagues hypothesized that immediately following a predator's arrival, longer-legged ...

Experimental cancer drugs counter muscle deterioration seen in muscular dystrophy

...ibitors on muscle regeneration was inspired by his previous studies, which started 10 years ago, in collaboration with Dr. Vittorio Sartorelli at NIH, on the biochemical and molecular mechanism regulating the expression of genes that coordinate muscle regeneration. These studies led to the identification of d...

Microbe fixes nitrogen at a blistering 92 C

...on and Oregon. Fixing nitrogen at 92 C smashes the previous record by 28 C, a record held by Methanothermococcus thermolithotrophicus, an archaeon that was isolated from geothermally heated sand near an Italian beach and fixes nitrogen at temperatures up to 64 C. Nitrogen is necessary for all life because i...

Pleasure and pain: Study shows brain's 'pleasure chemical' is involved in response to pain too

...nd pain regulation. The new findings build on previous pain research by Zubieta and his team, which has shown individual variation in the rating of pain, and has visualized the brain's own painkiller system responding to pain and even to the giving of a "placebo" painkiller medication. Now, the team ...

Mirrors in the mind: New studies elucidate how the brain reflects onto itself the actions of others

...tor system's role in social cognition, and support previous suggestions that the motor system may have strongly influenced developments in human social evolution. ...

Brains can recover from alcoholic damage but patients should stop drinking as soon as possible

...fied by the patients?brains expanding beyond their previous limits, with an outward brain edge shift for the outer regions and an inward shift for the inner ones. "In addition, on average across all the patients, cerebellar choline levels increased by about 20%, while levels of NAA in the cerebellar and fr...

Professors to develop hand-held pathogen testing device

...ng-based company formed by the same team through a previous grant from the Michigan Economic Development Corp., will test the device under field conditions. He has a team of six graduate students and technicians working on this device. "They are the heart of the project as well as the scientists being train...

Proteins anchor memories in our brain

...ow the elimination process is controlled came from previous work involving a protein in the cell nucleus called Aire (for autoimmune regulator), which regulates the expression of some 300 to 1,000 antigens in the thymus. Humans and mice lacking the normal Aire gene suffer from multiple autoimmune diseases inc...

Research links 'ecstasy' to survival of key movement-related cells in brain

...eloping central nervous system. He noticed, during previous laboratory studies in rats, that prenatal exposure to MDMA increased growth of dopamine cells in the brain. His team then decided to study exposure to MDMA in cultured embryonic cells--where they confirmed that this drug was in fact increasing dopami...

Autoimmune disease triggered if T cells miss a single protein early on

...ow the elimination process is controlled came from previous work involving a protein in the cell nucleus called Aire (for autoimmune regulator), which regulates the expression of some 300 to 1,000 antigens in the thymus. Humans and mice lacking the normal Aire gene suffer from multiple autoimmune diseases inc...

History-hunting geneticists can still follow familiar trail

...decisions, as well as affect literally hundreds of previous studies on humans and other mammals." UF Genetics Institute scientists analyzed publicly available mtDNA datasets of 47 species of mammals -- a subset of the animals that were in the French study -- as well as associated data on protein diversity ...

Emotional control circuit of brain's fear response discovered

...enter at Columbia University Medical Center. In a previous Neuron paper (Dec. 16, 2004), Dr. Hirsch and team identified a structure in the brain important for emotional processing ?the amygdala ?that was shown to light up with activity when people unconsciously detect fearful faces (to read the Columbia pres...

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