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Tag: "depend" at biology news

Researchers find Amchitka seafood safe for now

...indings should provide assurance to both those who depend on the Island's marine environment for subsistence food and for the significant commercial fishing interests of the region," said Charles W. Powers, principal investigator for the consortium. He noted that expedition scientists sampled and analyzed f...

Researcher says flu responders can learn from 1918 epidemic

...ir forebears, but Higgins said that survival might depend on the simple concept of community planning. In studying the metropolitan areas around the state of Pennsylvania, Higgins found that the areas that suffered the lowest mortality rates included Bethlehem, which benefited from the resources provided...

Wolves' top-down effect

...avored by the ungulates, and on other species that depend on the willow habitat. Hebblewhite and his colleagues found that in the low-wolf area of Bow Valley elk populations were 10 times as high as in the high-wolf area. "We also found that as elk populations climbed, active beaver lodges declined, proba...

New vaccine platform may fight infections with causes from influenza to bioterrorism

...ther infectious agents with existing vaccines that depend on a normal T-cell response. As such, the researchers were motivated to develop CD4+ T-cell–independent therapeutic strategies to meet this growing need. "While we'll need to replicate these findings in larger animal models, our studies indicate it...

A new window into structural plasticity in the adult visual cortex

...tional reorganizations. Probing this question will depend on determining what kinds of structural changes might be expected, figuring out how to detect them, and then interpreting the changes. Studying the responses of axonal arbors connected to the nonpyramidal dendrites, for example, may prove instructive...

Male elephants woo females with precise chemistry

... released in the elephants in specific ratios that depend on the animal's age and stage of its musth. They also found that alterations in those ratios elicit different responses in not only female elephants, but also other male elephants near the male emitting the pheromone. "We were certainly quite surpr...

Marine conservation organizations team up to conduct Indonesia coral reefs assessment

...l to the well-being of the people of Indonesia who depend upon the rich resources of the sea. This survey will help us understand the extent of the damage to the coral reefs from the tsunami and therefore guide management decisions to assist their natural recovery," said Capt. Philip Renaud, USN (Ret.), Ex...

Limiting the damage in stroke

... and nutrients. But the fate of the cells seems to depend on what happens next. Scientists discovered that damaged and dying brain cells are very actively using an internal "communications network" known as the NF-kB signalling pathway. Cells have many such networks; their function is usually to switch gene...

Study finds that nutritionally enhanced rice reduces iron deficiency

..., such choices are simply not possible and so they depend predominantly on staple foods to stave off day-to-day hunger. This is especially true in isolated rural areas where under-resourced and overstretched public health systems struggle to improve the overall nutrition of the world's poor through nutriti...

UW scientists unravel critical genetic puzzle for flu virus replication

...y of Tokyo. Viruses, including influenza viruses, depend on the cells of their hosts to survive. They infect cells and use them to help make more infectious particles, which are released from the cell and go on to infect other cells. Using a technique known as electron tomography, a method that enables sc...

Climate change: The rice genome to the rescue

...ecially important because most of the world's poor depend on it," he added. "We also need to ensure that the world community is not adversely affected by greenhouse gas emissions from rice production systems." Dr. Sheehy said researchers need to acquire knowledge and develop technologies critical to ensuri...

UCLA scientists find male gene in brain area targeted by Parkinson's

...covered that the brain cells that produce dopamine depend upon a sex-specific gene to function properly," Vi...erences in severity and rates in the genders could depend on the SRY levels in the brain," he said. ...

Invasive species harms native hardwoods by killing soil fungus

...asing chemicals harmful to a soil fungus the trees depend on for growth and survival, scientists report this...thwarting the biological "friends" upon which they depend for growth. The work, which provides striking evidence for a unique process by which invaders harm n...

Diverse tropical forests defy metabolic ecology models

...with orchids, ferns and bromeliads. Tropical trees depend on animals for pollination and seed dispersal and are constantly assaulted by insects, fungi, maelstrom and machete. Furthermore, soils, rainfall, the frequencies of hurricanes and fires, and assemblages of animals and plants in tropical forests all ...

Protecting endangered species helps reduce poverty

...d marine habitats. As a result, the rural poor who depend on these areas have more access to the goods and services they provide. Incomes increase and access to freshwater, health, education and women's rights often also improve. According to the report, some ecotourism projects based on the observation o...

Aggression-related gene weakens brain's impulse control circuits

...ded researchers discovered that the gene's effects depend on interactions with environmental hard knocks: men with L were more prone to impulsive violence, but only if they were abused as children. Meyer-Lindenberg and colleagues set out to discover how this works at the level of brain circuitry. Using st...

Wisconsin scientists find a way to make human collagen in the lab

...ere is nothing in the body, in fact, that does not depend in some way on collagen. In medicine, collagen from animals, principally cows, is used to rebuild tissue destroyed by burns and wounds. Commonly, it is employed in plastic surgery to augment the lips and cheeks of starlets and others seeking perpetu...

Salmonella caught red-handed

...ange of nutrients, which means Salmonella does not depend on its own biosynthetic abilities. Only a few enzymes in certain metabolic pathways are really necessarily to keep Salmonella bacteria alive. Most of these essential enzymes are missing in other important pathogens, or they are also present in the ...

Movement of chromosome in nucleus visualized

... for directed long-range chromosome movements that depend directly or indirectly on actin and myosin." Other authors include graduate students Anne Carpenter at UIUC, currently at a post-doctoral fellow at M.I.T., and Beata Fuchsova and Terezina Johnson at UIC. ...

For some young fish, early gene expression is a clear harbinger of fated lifestyle

...nd that levels of expression of a great many genes depend primarily on an individual's future lifestyle. The findings, which illuminate how programs of gene expression have evolved to control profoundly different developmental outcomes, are reported in the April 18th issue of Current Biology by Drs. Thomas...

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