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Tag: "changing" at biology news

Deep treasure to be found in Oculina Bank

...is to assess whether the habitat and fisheries are changing over time, and whether the reserve and enforcement are working," says Reed. A final goal for the cruise will be to collect samples of Oculina coral whose genetics will be analyzed back on land and compared against that of Oculina found in shallow ...

First big influenza genome study reveals flu evolution

...mparing these genomes, the researchers tracked the changing virus as it moved across the region. "This study ...s: hemagglutinin (HA) and neuraminidase (NA). Like changing coats, the influenza virus changes the shape of these HA or NA proteins when it accumulates minor mu...

The shape of things to come: Morphology database going global

...uist said. "That's one of the biggest challenges - changing habits. We need to convince scientists that this is a better way of working with their material and presenting their research. It's a matter of having a system that works well with lots of interesting images. That will go a long way to change people'...

Scientists map one of biology's critical light-sensing structures

...h can be precisely manipulated. "We can now start changing how phytochromes work in a rational way to improve... light, says Forest, have the effect of reversibly changing the structure of the pigment in the pocket, which then flips a switch on the protein to trigger the ...

Sperm stem cells closer to being like embryonic stem cells

...periments that prevented rat sperm stem cells from changing permanently into sperm have brought researchers one step closer to coaxing such cells to behave like embryonic stem cells, capable of growing into many other types of cells in the body. Researchers at the Cecil H. and Ida Green Center for Reproducti...

Is it Possible to Change Prescribing Habits?

... hospitals and private physician offices. However, changing prescriber practice at all is not easy to achieve and this approach thus warrants further research. ...

Penicillin, amoxicillin: Step aside for strep throat treatment

... paradigm for treating strep sore throats has been changing slowly, and endorsing the use of cephalosporins as a first-line treatment is something that needs to be seriously considered," Pichichero said. While the newer short-course cephalosporins are only available in brand-name form and are much more expen...

Limiting the damage in stroke

...eir function is usually to switch genes on or off, changing the chemistry and behavior of the cell. Most drugs work by interfering with molecules that play important roles within these networks. Scientists knew that NF-kB signaling was active in neurons, but its function was unclear. "We had some evidence th...

Cancer support cells may evolve, fuel tumor growth, study shows

...ic complexity of cell-to-cell interactions and the changing selective microenvironment that drives cancer development. ...

Olfactory system detects pheromones that control reproduction

...als. Pheromones are chemicals that are involved in changing behavior or hormone secretion. According to most biology textbooks, detection of pheromones takes place in a specialized structure, called the vomeronasal organ (VNO). Although the VNO resides in the nasal cavity, the pheromone sensory system is dist...

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

... clock resets the evening clock every day, without changing the intrinsic speed of the evening clock. Between daily resets, therefore, the evening cells time evening activity with their own clock, but they will always start counting time from the moment they were reset by the morning cells. In other words, t...

Carnegie Mellon U. transforms DNA microarrays with standard Internet communications tool

...lace during an experiment -- adding a chemical or changing the temperature, for instance. This aspect of the method provides scientists with the specificity they need to weed out such introduced gene activation from fundamental gene activation pathways that form the hallmark of processes like cancer or immun...

UCLA scientists discover immune response to HIV differs, even in identical twins

...e, killing the invader. HIV escapes this action by changing shape so that it does not fit into those receptors...ies to escape that immune response by mutating and changing shape. The twins' targeting of the HIV was remarkably similar 17 years after infection yet their ov...

New maps reveal true extent of human footprint on Earth

...nkutty and other SAGE researchers are tracking the changing patterns of agricultural land use around the world...rge 'disconnect' between global, top-down views of changing planetary conditions, and the local, bottom-up perspective of how humans affect and live in a changi...

Researchers map of genetic variations implicated in disease

..." The study further described over 300 amino acid changing variants in gene sequences. These variants are strong candidates for functional studies to understand the role of variation in MHC-associated disease. Autoimmune disease affects about 3 million people in the UK. The three haplotypes studied here dis...

Computers to save unique type of American red squirrel

...line in recent years is an indication of something changing on the mountain, and we need to find out what it is. He added: "There are also important ecological reasons to save it - for example the squirrel's middens are an important source of food and habitat for chipmunks, voles, and mice, and the forest ...

Penguins okay with human visitors?for now

... the immediate. The consequences of the penguin's changing behavior may not become apparent until later in life. When approached in their nest, Magellanic Penguins turn their heads back and forth, looking at the approacher with one eye and then both. When stressed, the increase in their hormones facilitate...

Scientists discover interplay between genes and viruses in tiny ocean plankton

...on and helping scientists see how microbes exploit changing conditions, such as altered light, temperature and nutrients. "These results tell us that even the smallest organisms show genetic variation related to the environment in which they exist," said Philip Taylor, director of the National Science Founda...

Tastier tomatoes in the future?

...ther by cross-breeding them with wild tomatoes, or changing their genetic make-up technologically. Scientists from the Max Planck Institute for Molecular Plant Physiology in Golm, and their Israeli colleagues at Hebrew University in Jerusalem, chose the second option. They investigated strains of tomatoes cre...

Ernst Mayr's theory illustrated in genetic epidemiology studies

...t's minor, and that's another way of saying you're changing how natural selection acts on the system," he said. ...

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