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Tag: "rest" at biology news

Novel protein complex enables survival in hostile environment

...le sulfite toxicity, we could hypothesize that the rest of the sulfate reduction pathway once existed in these organisms." Johnson and Mukhopadhyay have already seen some remnants of this system in M. jannaschii. Thus, they say, it is possible that methanogenesis and sulfate reduction could have origin...

Seal rookeries could provide a reliable food source for endangered California condors, study finds

...stocene birds fed primarily on marine species, the rest on a mixture of marine mammals and giant land mammals. "When the Ice Age ended, most of the terrestrial megafauna vanished," Chamberlain says. "There's a theory that they were killed off by humans, and as a result, the condors that lived inland no ...

Picking particles faster than one at a time

... certain size and brightness are retained; all the rest are thrown away in a step called binarization, or ...rded and replaced with a pattern textured like the rest of the background. At this end stage of the procedure -- although not at the beginning -- it may be ...

Predators keep the world green, ecologists find

...s: why is the world green? It also seems to put to rest a competing theory that plants protect themselves from herbivores through physical and chemical defenses. The researchers drew their conclusions from study of a Venezuelan valley flooded 20 years ago by a hydroelectric project. The research, repor...

Neurons find their place in the developing nervous system with the help of a sticky molecule

...l cortex. The cortex sits like a skullcap over the rest of the brain and is responsible for sensory perception, higher-level reasoning, and, in humans, language. In mammals, the largest and evolutionarily newest part of the cortex, the neocortex, is recognized anatomically by its six horizontal layers. T...

Immune response to HIV in the brain

...n order to protect against the virus. "As in the rest of the body, in the brain immune cells achieve a level of control of the virus, but are unable to clear the infection," says Howard Fox, associate professor at Scripps Research and director of Scripps NeuroAIDS Preclinical Studies center, who led the...

Experimental vaccine protects nonhuman primates when given after exposure to Marburg virus

...n order to protect against the virus. "As in the rest of the body, in the brain immune cells achieve a level of control of the virus, but are unable to clear the infection," says Howard Fox, associate professor at Scripps Research and director of Scripps NeuroAIDS Preclinical Studies center, who led the...

Learning to love bacteria: Stanford scientist highlights bugs' benefits

...that then settles down and stays with them for the rest of their lives. Although very few of these organisms remain in the mice, it is enough to cause the immune system to have an ongoing response. "It's not so much that the immune system has failed," Falkow explained, "but that the organisms have manipu...

Scientists look to the Bahamas as a model for coral reef conservation

...that then settles down and stays with them for the rest of their lives. Although very few of these organisms remain in the mice, it is enough to cause the immune system to have an ongoing response. "It's not so much that the immune system has failed," Falkow explained, "but that the organisms have manipu...

Growth hormone is made in the brain, report scientists

... be obvious compared to what they are doing in the rest of the body." The authors previously found that hippocampal growth hormone increases with learning. The current study shows that the hormone is very different in males versus females. "Males and females look different, we act different, so of cour...

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

...ows the delivery of messages from the brain to the rest of the body, leaving the person unable to initiate or control their physical movements. The condition eventually leads to paralysis. "For the first time, we've discovered that the brain cells that produce dopamine depend upon a sex-specific gene to ...

Marine mammals are on the frontline of failing ocean health

...d disease vectors to move into new areas. "The rest of the world is likely to see similar changes as w... way of life, not just our wildlife." Getting the rest of the world to pay attention to the health of marine mammals may be the first step in mitigating po...

Nanotechnology may find disease before it starts

...umor, and not have such a pronounced affect on the rest of the body," Rosol said. "The problem with chemotherapy is that the drug affects the whole body, causing a host of problems such as hair loss, diarrhea and anemia." ...

Researchers solve mystery of how nuclear pores duplicate before cell division

...de the nucleus can continue communicating with the rest of the cell. "This issue is as important to understanding the cell cycle as is the question of how DNA replicates," says Martin Hetzer, Ph.D., an assistant professor in the Molecular and Cell Biology Laboratory and lead author of the study published ...

New cellular flaw found in some virulent breast cancers

...elp regulate a cell's passage through its cycle of rest and growth. Overabundance of cyclin D1 has been observed in many cancers. For a number of years, Sicinski's laboratory has carried out a series of experiments to determine whether the protein has an important normal function, or whether it could be b...

How nerve cells stay in shape

...lecules, which clearly distinguishes them from the rest of the cell. Furthermore, these contact sites can change structure and characteristics with incoming signals. In dendrites, these changes can only happen when certain proteins are produced at the synapse. A prerequisite for protein synthesis, however...

Alternatives to the use of nitrate as a fertiliser

...nced in one type of pea can be extrapolated to the rest of the varieties of the species. Nevertheless, different ranges of tolerance and strategies are observed for growth under ammoniacal nutrition. Cloning pea genes To study the ammonium assimilation enzymes, GS and GDH, in depth, these pea genes h...

UCSD team unmasks family of immune system invaders

...terial entry from the intestine and colon into the rest of the body. However, bacterial pathogens can inject effector proteins into the intestinal epithelial cells, creating a door in the barrier. "As a result, these bacteria proteins are the bad guys that make you sick," said Alto. "Instead of curing ...

New gene reduces retinal degeneration in fruit flies

... expressed 15 times higher in the fly eye than the rest of the fly head. They found that this gene is required for a second biochemical pathway that controls the activity of a protein called the TRP channel. TRP channels are found in fruit fly neurons responsible for sensing light. The fly TRP channel is ...

Access to antiretrovirals unlikely to reduce HIV infection rates

...ger and are healthier. Counseling patients and the rest of society to promote safe sex practices must therefore be an essential part of any strategy if it is to contain and reverse the AIDS epidemic. The model presented here can support health policy makers in resource-poor settings in their difficult tas...

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