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Tag: "least" at biology news

New molecular pathway could reveal how cells stick together

...o remodeling as the flies grow and develop, but at least one, the breathing tubes, do not develop properly in the mutant flies. Page-McCaw calls it a "cellular adhesion defect that causes problems for the animal at the tissue level." Now she plans to find how ninjurin affects breathing tube development,...

UBC researchers reveal dwarf aquatic plants' hidden ancestry

...ring plants soon after they began to diversify, at least 135 million years ago, during the age of the dinosaurs. Fully grown individuals in the Hydatellaceae family can be as small as 1-2 centimetres in height, and have dozens of minute flowers clustered into each compact flower head. Native to Aust...

Post oak grasshoppers emerging

...s begin to climb trees to feed. They go through at least five developmental stages before becoming adults, all the while munching on leaves. Currently, they are still in the pre-adult stage, he said. The grasshoppers prefer post oaks, but Behmer has heard reports of them feeding on other oak and hickor...

Genes and biomarkers that allow doctors to choose the right therapy for the right patient

...regimen is likely to be the most effective and the least toxic is more complicated than ever," said Pierre Laurent-Puig, M.D., PhD, a professor of Oncology at University of Paris-Decartes. "Characterizing the factors that are predictive of toxicity and efficacy could lead to significant improvement in both...

Bats prey on nocturnally migrating songbirds

...challenging trans-continental migrations, could at least release anti-predator vigilance thanks to the concealment of darkness. A new study by Spanish and Swiss scientists ?published this week in PLoS ONE ?shows that migration at night is not without predation risk for passerines. A unique creature is in...

New species declared: Clouded leopard on Borneo and Sumatra

...a report showing that scientists had identified at least 52 new species of animals and plants over the past year on Borneo. Last month in Bali (Indonesia), the ministers of the three Bornean governments ?Brunei Darussalam, Indonesia and Malaysia ?signed an historic Declaration to conserve and sustainab...

Procedure predicts embryos most likely to result in pregnancy

...transfer of multiple embryos with the hope that at least one will lead to a pregnancy." By comparing the content of the successful and unsuccessful embryos, the team established a metabolic profile of embryos that resulted in pregnancies as well as ones that did not. "We found that proton NMR, a non-...

Xylitol reduces risk of cavities

... The daily intake should be distributed over at least three occasions. The products should contain as much xylitol as possible and not be mixed with other sweeteners. ...

Mystery of fossilized trees is solved

... grow. The new specimens show that they reached at least 8 metres in height and formed the first known forests on earth. Dr Berry, of Cardiff's School of Earth, Ocean and Planetary Sciences, said: "This is a spectacular find, which has allowed us to recreate these early forest ecosystems. Branches from ...

QUT scientists on the way to sifting out a cure for HIV

...ates of flow that pass through the membranes by at least ten times compared with current ceramic membranes, while maintaining the efficiency of capturing over 96 per cent of the unwanted particles." Dr Zhu said the membranes, which have been patented by QUT, were not solely restricted to blood filtratio...

Ethanol vehicles pose a significant risk to human health, study finds

... said. ''But we found that using E85 will cause at least as much health damage as gasoline, which already causes about 10,000 U.S. premature deaths annually from ozone and particulate matter. The question is, if we're not getting any health benefits, then why continue to promote ethanol and other biofuels?...

Amur leopard still on the brink of extinction, scientists say

...important thing for the leopards' survival." At least four leopard litters were encountered during the c... to restore itself. But for long-term survival, at least 100 animals are needed. "Conservation of large predators needs vast territories with minimal anth...

Researchers discover new details about HIV-1 entry and infection

...ypes. Infection of CD4+ T cells appears to rely at least in part on expression of major HIV-1 coreceptors like CCR5, whereas pathways for infection of vaginal LC appear to be more diverse and complex. In contrast to previous studies, infection of CD4+ T cells does not appear to require passage of the virus...

Scientists discover a new risk factor for Alzheimer's

...her SNP signature. "This implies that there are at least two, and possibly more, gene variants at work here," said St George-Hyslop. "That's not unusual--in many diseases you see multiple variations that all impact a specific gene." The team used the SNP databases to track the SORL1 gene in the populatio...

Napoleon's mysterious death unmasked, UT Southwestern researcher says

...have recently found that the plump emperor lost at least 20 pounds in the last six months of his life, a si...the entrance of his stomach to the exit. It was at least 10 centimeters long. Size alone suggests the lesion was cancer," Dr. Genta said. They then used a...

Discovery of an HIV inhibitor in human blood points to new drug class

...-1 does not easily develop resistance to VIRIP, at least in cell culture. Furthermore, their collaborators ... to show up more and more," Kirchhoff said. "In at least some industrialized countries, it is already a severe problem." ...

Studies yield insight into the numerical brain

...symbols with numbers. "Our results show that, at least in the adult brain, numerical symbols and nonnumerical numerosities converge onto shared neural representations," they wrote. "Perhaps we attach meaning to symbols by physically linking populations of neurons sensitive to symbol shapes to preexisting...

Gene study shows three distinct groups of chimpanzees

...on chimps plus the bonobos. Hybrids, those with at least five percent of their DNA from more than one common chimpanzee population were rare, with most of the hybrid chimps born in captivity. "We saw little evidence of migration between groups in the wild," said Celine Becquet, first author of the paper...

Long-term narcotics use for back pain may be ineffective and lead to abuse

...ith non-malignant chronic back pain lasting for at least three months. The research focused on efficacy of oral, transdermal, or topical opioids, where there was no pre-existing diagnosis of opioid dependence. According to the report, opioids may be effective for the short-term (less than four months) t...

Long-lived deep-sea fishes imperiled by technology, overfishing

...probably purchasing a filet from a fish that is at least 50 years old," Heppell said. "Most people don't th... the recovery time for some rockfish species is at least 200 years," Heppell said. "And we still don't know all of the factors that influence their survival....

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