changing 2 7

Tag: "changing" at biology news

'Scent of a woman' tells male redback spiders to find a mate

... time that it's been shown that males are actually changing their development in response to both sexual and natural selection." Redback spiders are relatives of black widow spiders and the marble-sized female redbacks dwarf the males, who are about the size of a grain of rice. While the females can live for...

Taking evolution's temperature: Researchers pinpoint the energy it takes to make a species

...w species is a fixed quantity. "These authors are changing evolutionary biology, ecology and biogeography, putting them into a firm and quantitative foundation based on the first principles underlying individual metabolism," Marquet said. ...

UC San Diego biologists solve plant growth hormone enigma

...'t require adding any new genes to the plant, just changing when the appropriate auxin genes were on or off could alter growth. For example, to make seedless tomatoes, one could activate auxin in the floral organs before fertilization has taken place." Applying auxin to the flowers by hand can also induce s...

In a technical tour de force, Salk scientists take a global view of the epigenome

...itable changes in gene function that occur without changing the letters of the DNA alphabet - show that how a cell "reads" those letters is critical. Methylation is chemical modification of one letter C (cytosine) of the four letters (A, G, C, and T) reiterated in our DNA. Adding a bulky methyl group to a ...

Chocolate, wine, spicy foods may be OK for heartburn, Stanford study finds

... said. "Since I don't have a lot of evidence that changing their diet dramatically is going to take the heartburn away, it makes more sense just to take the medicine," she added. That said, Gerson allowed that for some patients, a minor change in diet can make sense. "If a patient comes in and states, 'Red ...

Antarctic Treaty Meeting moves to protect frozen continent from non-native species

...on is better than cure." Concerned that a rapidly changing and warming climate on the Antarctic Peninsula could increase the risk of non-native species establishing themselves on the continent itself, the meeting also backed a series of recommendations made by New Zealand. These include development of a code...

Honey helps problem wounds

...sity Children's Clinic, emphasises. 'What is more, changing dressings is less painful, since the poultices are easier to remove without damaging the newly formed layers of skin.' Some wounds often smell unpleasant ?an enormous strain on the patient. Yet honey helps here too by reducing the smell. 'Even wounds...

Tiny shock absorbers help bacteria stick around inside the body

...dden changes in forces caused by rough and rapidly changing flow conditions," explained study co-author Dr. Viola Vogel, professor in the Department of Materials at ETH Zurich. This process maintains an optimal force required to keep the finger trap-like FimH anchor from breaking loose. "This system is simil...

Flick of a protein switches immune response

...on and off a key component of the immune system by changing partners in an elegant genomic dance, said researchers at the University of Southern California and Harvard Medical School. Because autoimmune diseases ?such as arthritis, allergies and dozens of other illnesses ?begin when the body's defenses resp...

In-home sensors spot dementia signs in elderly

...developed by ORCATECH are "a critical precursor of changing reactive health care to proactive care for individuals." A more proactive health care approach may be essential to managing the rising cost of health care for aging baby boomers. And "being able to stay at home and maintain independence represents...

What's shaped like a pear and has 2 genomes? Check the pond

..., either into different places inside a cell or by changing the cell over time. It is a master multi-tasker. "This organism is a true generalist," says evolutionary biologist Jonathan A. Eisen, who led the Tetrahymena project while at The Institute for Genomic Research (TIGR) and is now at the University of...

DOE JGI sequences, releases genome of symbiotic tree fungus

...ween these two symbionts within the context of the changing global climate." "Characterization of the interactions between poplar and its symbiotic associate, Laccaria bicolor, allows us to explore the coordinated response to environmental stressors, such as drought and extreme temperature, and other biolog...

Viagra improves high altitude exercise performance up to 45% for some

... mg. The high altitude simulation was achieved by changing the mix of air. The cyclists began breathing the high altitude mix starting one hour before the exercise session and continuing through the session. The simulation did not include the lower air pressure that would occur at altitude, Friedlander said....

Adult stem cells are touchy-feely, need environmental clues

...archers were even able to manipulate stem cells by changing the firmness of the gel on which they were grown. The researchers believe that their findings, which appear in the Aug. 25 issue of the journal Cell, could change the way in which people work with stem cells. "Basically, mesenchymal stem cells ...

Long-term changes in experience cause neurons to sprout new long-lasting connections

...ew connections alter the circuitry of the brain by changing communication between neurons. The researchers said their findings aid understanding of how procedural learning induces long-term rewiring of the brain. This type of learning is used in mastering skills such as riding a bicycle or typing on a comput...

Buckyballs boost antibody's chemotherapy payload

...rug molecules to an antibody without significantly changing its targeting ability. That happens, in large part, because the chemical bonds that are used to attach the drugs -- strong, covalent bonds -- tend to block the targeting centers on the antibody's surface. If an antibody is modified with too many cova...

Tropical forest CO2 emissions tied to nutrient increases

...he study is important because human activities are changing the amount of phosphorus and nitrogen in ecosystems all over the globe, including the tropics, Cleveland said. Tropical rain forests play a dominant role on Earth in regulating atmospheric CO2, the primary greenhouse gas that has increased by roughly...

Recombination protein dynamics observed with single monomer resolution

...the brightness of the two dyes simultaneously. The changing ratio of the two intensities indicates the relative movement of the two dyes, and therefore the motion of the molecule or its change in size. The technique revealed intricate details of how RecA nucleates to form a filament, how the filament changes...

Gatekeeping: Penn researchers find new way to open ion channels in cell membranes

...in the membrane of an oocyte, or egg cell) without changing the membrane voltage. The finding introduces a new...finding that SMase D can open ion channels without changing membrane voltage provides a clue to the mystery. ...

Failure of 'scout cells' may lead to cancer in transplant patients

...adding IFNg to TGFb prevented the scout cells from changing and allowed them to strongly re-stimulate the memory T cells. If our hypothesis proves to be true, VanBuskirk says, it may one day be possible to identify transplant patients who are at greater risk for PTLD and to develop new therapies that pre...

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