Tag: "dominates" at biology news

Cancer rates in teens and early 20s rising

...lignant brain tumours (18%). By age 15-19 lymphoma dominates (27%) with leukaemia second (15%) followed by carcinomas and malignant brain tumours (around 11% each). Lymphoma also dominated in 20 to 24-year olds with carcinomas second (21%) and germ cell tumours third (17%). Much less is known about the causes ...

Rare ant may help solve some mysteries of social evolution

...if the parasites interact with each other, and who dominates in those interactions. "Slave-maker behavior ranges from the all-out ruthless and bloody annihilation of another ant colony to slave-maker ants that have a more harmonious relationship with their host," Herbers said. "We want to know what separates t...

Professor uses satellites to protect Amazon forests, global climate

...timber; the rest turns to waste. Selective logging dominates current landscape use in Brazil and is also among the biggest threats to the global environment. At the same time, people involved in the timbering process - clearing land and removing wood with tractors - further denude the landscape. That landscape...

A new hypothesis on the origin of 'junk' DNA

...on junk DNA sequences are still with us." Junk DNA dominates eukaryotic chromosomes. The chromosomal space taken up by just 30 human genes and the DNA within and between those genes could easily accommodate whole bacterial genomes containing 3,000 or 4,000 genes, Lynch said. While some of what geneticists have...

UCSF-led study raises doubts about marrow cell treatment for brain, heart

...some very interesting questions about how one cell dominates over another to maintain a functional hybrid." "The fact that adult bone marrow-derived cells fused with pre-existing local cells, rather than trans-differentiating into new cells, under the experimental conditions that we used, means that they may d...

JCI table of contents, July 15, 2003

...rt that it is the lysosomal pathway that primarily dominates hepatocyte apoptosis. They also demonstrate a direct link between hepatocyte apoptosis and fibrosis. The data suggests that inhibition of apoptosis and perhaps the lysosomal pathway of apoptosis are important in the prevention of fibrosis and a numbe...

Rutgers geneticists redefine the nature of hybrid corn

...tal lines would produce themselves. Maize (corn) dominates agriculture in the United States, where, according to the National Corn Growers Association, 9 billion bushels are produced annually at a value of more than $21 billion. No crop rivals its total grain yield or the diversity of its uses. Virtually a...

NSF awards $4.3 million to Rutgers for Maize Genome Sequencing Project

...develop new approaches to genomic studies." Maize dominates agriculture in the United States, where approximately 9 billion bushels of corn double the yield of any other crop are produced annually at a value of $30 billion. Over and above its value as a primary food crop, corn is increasingly being used in...

Without blue crabs, southern salt marshes wash away, study finds

...les ate all of the cordgrass in a marsh. Cordgrass dominates the southern marsh, anchoring it and providing its animals with habitat. Without the plants to bind sediment and protect wildlife, the salt marsh ecosystem collapses, the scientists found. In fact, the study shows that overgrazing by periwinkle snail...

Scientist explores the future of research collaboration

..., that of teamwork, or giant collaborations, which dominates today. Arising out of the organizational pattern used in high-energy physics after World War II, teamwork has spread to fields such as molecular biology and biomedical research. "As globalization and internationalization continue," writes Beaver, "em...

Cell Pathways CP461 demonstrates multiple anti-cancer activities

...negative form of PKG (an inactive form of PKG that dominates over the normal molecule without toxicity to the cell) grew more rapidly and were more resistant to apoptosis induction by SAANDs such as Cell Pathways first-generation SAAND, exisulind (Aptosyn). These intact cell data provide substantive in vitro...

Proteins in African HIV strains interact differently with drugs

...GenBank) in Africa to recreate the proteins. HIV-A dominates in the northern part of Sub-Saharan Africa, while HIV-C is prevalent in southern regions. Freire's lab measured the proteases' efficiency and biochemical fitness through factors related to catalysis, a chemical term for a process where one substance ...

Scientists at Penn track epileptic seizures

...ive effort to control symptoms of a condition that dominates the lives of otherwise healthy individuals by its dramatic unpredictability," Litt said. The potential to use our findings to help people with poorly controlled seizures world-wide is enormous. About 50 million people throughout the world suffer fro...

Scientists discover how nerve cells move from target to target as they wire up the developing embryo

... both types of signals are present, then repulsion dominates - attraction is switched off. The rule is clearly designed to prevent the axon from becoming confused, which could have disastrous consequences to the developing embryo." In just the last eight years, studies in fruit flies, mice and humans have all...

Growing neurons use silencing mechanism to avoid disastrous tug-of-war

...these receptors in a cell, the repulsive receptor dominates by taking hold of the attractive receptor and subverting it for its purposes, if you will,” said Tessier-Lavigne. “And that also specifically involves the cytoplasmic domain.” He speculates that an interlocking control mechanism ...

Infections may trigger autoimmunity via rare, but normal process

...d over the first five to seven days. This response dominates the immune landscape initially and helps to clear the infection from the body quickly. Caton and others had previously shown that self-reactive cells are effectively eliminated from this group of cells. The surprise, however, came when Caton's team e...

Environmental quality gains require major policy changes

...costly and inflexible regulatory system that still dominates environmental policy in the United States neither encourages nor rewards corporate environmental management systems that exceed compliance requirements. "New policies must provide a holistic and integrated approach to environmental management that f...

North America does not absorb as much carbon dioxide as it emits, say Colorado State University researchers and others in current 'Science'

...ow being questioned suggested thatNorth America so dominates terrestrial sinks that ecosystem uptake of carbon dioxide almost balancesthe continent's huge level of emissions. The new model and data indicate this is incorrect; carbondioxide fertilization (the stimulation of plant growth by increasing atmospheri...

Do US ecosystems balance US fossil fuel use?

...ng. One such analysis suggested that North America dominates terrestrial sinks, so that ecosystem uptake actually amost balances North America1s huge fossil fuel emissions. Researchers led by Prof. David Schimel, Director at the Max-Planck-Institute for Biogeochemistry in Jena, with team members from ...

In mapping the structure of short-lived bacterial 'switches,' biochemist may find novel answer to antibiotic resistance

...ost cells." Part of a two-component system that dominates signal transduction in bacteria, the phosphate-juggling protein switch mapped out by Kern and her colleagues works by snatching a single phosphate ion from the amino acid histidine. The phosphorylated protein then binds to bacterial DNA, turning on g...

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