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Tag: "explored" at biology news

NASA-funded robotic sub finds bottom of world's deepest sinkhole

...sed to determine the location of the vehicle as it explored the cenote. It also used the sensors to create maps of the sinkhole’s interior via a technique called simultaneous localization and mapping, or SLAM. Prior to the DEPTHX field experiment, SLAM had been used for navigating in buildings and mines, but ...

Survival of the rarest: Fruit flies shed light on the evolution of behavior

...ore new food patches than sitters. The researchers explored the evolutionary mechanism that favours the persistence of both of these types in nature. Doctoral student Mark Fitzpatrick raised colonies of flies with different ratios of rovers to sitters and different concentrations of nutrients in their food...

UCLA AIDS Institute researchers find a peptide that encourages HIV infection

...uman cells, retroviral vectors are currently being explored as vehicles for gene therapy," the authors wrote. "In this area, at least, agents that enhance retroviral uptake could contribute to an emerging field of medicine." "So many people have tried to deliver genes into different kinds of cells," said ...

Discovery of new cave millipedes casts light on Arizona cave ecology

... "Western U.S. caves have not been at all well explored for examples of cave life" Shear said. "We can expect more new species from the ongoing work at Northern Arizona University." This new genus was confirmed by analysis of the eighth pair of legs (or gonopods) on the male specimens. Gonopods are hi...

Researchers identify gene involved in dog size

... mammalian species. In their study, researchers explored the genetic basis for size variation among dogs by comparing the DNA of various small dog breeds, including Chihuahuas, Toy Fox Terriers and Pomeranians, to an array of larger dog breeds, including Irish Wolfhounds, Saint Bernards and Great Danes. Th...

Veterinary scientists explore poultry virus as cancer killer

...everal other oncolytic viruses are currently being explored to treat cancer. However, Subbiah’s work is the first to alter Newcastle disease virus through a reverse genetic system to target prostate cancer specifically. Reverse genetics is the process of generating a recombinant virus from cloned complime...

A genetic 'gang of 4' drives spread of breast cancer

...to escape into circulation. The researchers next explored how loss of the four abnormal genes affected the m...l Academy of Sciences, Massagué and his colleagues explored how the entire group of 18 genes, called the ‘lung metastasis gene-expression signature?(LMS) influe...

First-degree fetal heart block may be reversible

...ere early signs of fetal heart problems. They also explored whether early treatment would reverse the problems. The team found that while first-degree fetal heart block may be reversible with the steroid drug dexamethasone, the condition could advance within as little as one week to a third-degree block, ...

Insomnia drug can improve brain function

...ct of zolpidem on motor and cognitive function and explored its effect on brain activity using positron emission tomography (PET) scans. They administered motor tests such as finger tapping and walking, and language tests such as spontaneous speech, word repetition, and object naming. They also conducted brai...

OHSU lab finds meth receptor that could lead to therapy

...AR1. Encouraged by this observation, Grandy's team explored the effects of these drugs on mouse TAAR1 and a human-rat TAAR1 hybrid and found all three receptors respond in similar ways. "The results of this study unequivocally demonstrate that meth and amphetamine are able to directly activate this recepto...

Scientists uncover new target in cancer mutation puzzle

...hors Mingxuan Xia, Ph.D., and Hartmut Land, Ph.D., explored how the Rho family of proteins, which are involved in cell movement, and thus in the progression from benign to malignant cancer, are controlled by two well-known cancer genes, p53 and Ras. By closing in on this deadly collaboration, researchers s...

Antibody signal may redirect inflammation to fuel cancer

... nature of the discovery and its implications were explored in a June 2005 commentary in "Nature" (2). A review this month by Coussens and Ting-Ting Tan, PhD, a postdoctoral fellow in Coussens?laboratory, brings together many related threads of research in this fast-evolving area of inquiry. It was publishe...

MIT biologists solve vitamin puzzle

...DMB synthesis reaction takes place. Still to be explored is the question of why soil bacteria synthesize B12 at all, Walker said. Soil microorganisms don't require B12 to survive, and the plants they attach themselves to don't need it either, so he speculates that synthesizing B12 may enable the bacteria t...

Major link in brain-obesity puzzle found

...rt, pancreas and muscle. Rui and his team also explored the role of SH2B1 in fat cells, finding that the knockout mice that lacked the SH2B1 gene stored away much more fat than normal mice, and had much larger fat cells ?giving them two-and-a-half times more body fat content than normal mice. The mice tha...

New imaging technique tracks traffic patterns of white blood cells

... surface markers and microdomains." Researchers explored various mouse models including that of Sickle Cell disease which is a common inherited blood disorder in the United States, affecting 72,000 Americans according to the National Institutes of Health (NIH). Sickle Cell disease is a blood disorder that ...

How did bilaterally symmetric flowers evolve from radially symmetric ones?

...gist José M. Gómez (Universidad de Granada, Spain) explored how different flower shapes affected plant fitness in natural populations of Erysimum mediohispanicum, a Mediterranean herb. Their findings will be published in the October issue of The American Naturalist. The researchers found that plants bearing...

Peering into the shadow world of RNA

...ol.? Nishikura’s own research has for many years explored RNA editing mechanisms. In particular, she has studied an enzyme called ADAR that converts specific occurrences of a basic RNA building-block molecule called adenosine into another called inosine. In her laboratory, this simple substitution has been ...

New research identifies gene important for nicotine's effects on the brain

... overall behavior is changed. " Picciotto's work explored how the brain changes when it receives nicotine and, therefore, focused on the dopamine system in the brain. Dopamine is one of a number of neurotransmitters that plays an important role in motivation and reward processes. Nicotine activates the do...

LSD treatment for alcoholism gets new look

...and has some intriguing properties that need to be explored further." ...

Rearing an army to save wheat

... then introduced the parasitic wasps. His research explored whether supplemental food provided as nectar from flowering plants or as honey water increases the number of parasitic wasps produced in each cage. Another part of his thesis project examined whether using special ultraviolet and visible light-transm...

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