Tag: "lines" at biology news

Technology already exists to stabilize global warming

... A strong case for action comes from three lines of evidence, said Pacala. First, investigations of the Earth's climate over the last million years show that various factors, such as changing carbon dioxide levels, tend to reinforce each other and cause the temperature "to switch all at once" as it...

T. rex owes its giant size to the ultimate teenage growth spurt

...osaurs. They determined the age by counting growth lines in T. rex bones and calculated the corresponding b...hollow cavities or remodel as they grow, so growth lines are clear when viewed under a microscope. "Our work was based on counting lines in a very large num...

Two-month study of life in mid-Atlantic yields trove of species, new insights & questions

...000 meters on a seamount north of the Azores. The lines of evenly-spaced, 5 cm-wide holes create the impre...t a single opening, but then how and why can these lines be that straight?" ("Fig. 16." Photo credit: MAR-ECO.) Two specimens of the rare Aphyonus gelati...

New technique helps scientists reveal interactions between genes and drugs

...e Division of Biostatistics took advantage of cell lines established as part of the effort to map the human..., France have created approximately 700 human cell lines from multiple generations of large families in Utah, France and elsewhere. Washington Universi...

Duke study disputes idea that trees can 'relocate' quickly in response to climate change

...hen you put the molecular data together with other lines of evidence, it suggests that maybe they didn't move as fast as we previously thought," said James Clark, H.L. Blomquist Professor of Biology at Duke's Nicholas School of the Environment and Earth Sciences. "Maybe the species that are growing far to ...

Two-pronged attack targeting EGF receptor hinders cancer cell growth

...h of head and neck, prostate, and lung cancer cell lines grown in culture, and lung cancer tumors developing in animals. Tandem application of either Erbitux and Iressa, or Erbitux and Tarceva, proved synergistically more effective than single drug treaent at several levels. "The combination of Erbitux ...

Altered expression of key developmental genes underlies evolution of butterfly wing patterns

... in question, so-called "intervein" patterns, have lines of symmetry halfway between the insect's wing veins and occur in a range of shapes, including eyespots, ellipses, and midlines. How these dramatic markings have evolved is not completely understood. Previous work had implicated several genes in the f...

Structure solved at Scripps shows how one human protein reduces potency of chemotherapy

...ls, this protection can cut both ways. "Tumor cell lines hijack [AGT's] function and overexpress the protein to escape therapies," he says. Cells in some tissues, such as the brain, naturally have high levels of AGT. This enables cancers that arise in the brain to resist chemotherapy. Cancer cells in other...

New compound 'highly efficacious' at reducing human tumour growth

...hibition of the proliferation of human tumour cell lines in vivo. ZK-CDK blocked cell cycle progression in G1 and induced apoptosis, blocked VEGF-induced vascular permeability in vivo and reduced the blood supply of human tumour xenografts. "These animal data are very promising in terms of anti-tumour effi...

The first domesticated donkey was born in Africa

...t all domesticated donkeys come from two different lines from northeast Africa. Donkeys were the last species of domestic livestock (cows, sheep, goats, horses, pigs, etc.) to be domesticated. Archeological evidence suggests that they were domesticated some 5,000 to 6,000 years ago. However, there was no s...

Scientist honored for studies of genetic influence on chemotherapy, tumor development

...e for battling cancer and Dr. Lowe is on the front lines of this research. His research in the genetic understanding of cellular life and death is exactly what will allow us to continue to make gains in how cancer is treated, diagnosed and eventually defeated." Lowe's early research focused on the ...

Scientists discover genetic marker responsible for two-fold increase in risk of rheumatoid arthritis

...lecule, which in turn interrupts the communication lines and keeps immune cells from becoming overactive. In cases where the SNP is present in one or both copies of an individual's genes for this enzyme, the team found that the negative regulation by this enzyme appears to be inefficient, so that T cells a...

Stonehenge study tells pagans and historians it's good to talk

... the report. It points out, however, that dividing lines have been drawn up differently over the current redevelopment plans. For many pagans, prehistoric sites are not ruins but living temples or sacred sites. They feel drawn to these places to perform seasonal rituals or to observe astronomical events. M...

Just add a chromosome

...ene therapy. The researchers started with two cell lines containing the artificial chromosome, and added the gene for the human blood hormone erythropoietin to the chromosome. Cells with the artificial chromosome carrying the gene were selected and injected into mice. As expected, the animals showed signi...

JCI table of contents, 15 June 2004

...es given the limited number of embryonic stem cell lines available. Mari Dezawa and colleagues, from Kyoto University, now show that adult stem cells from bone marrow can also be changed into neuronal cells and that these cells benefited a Parkinson disease rat model. The authors induced the bone marrow ce...

Turning bone into nerve

...es given the limited number of embryonic stem cell lines available. Mari Dezawa and colleagues, from Kyoto University, now show that adult stem cells from bone marrow can also be changed into neuronal cells and that these cells benefited a Parkinson disease rat model. The authors induced the bone marrow ce...

Susceptibility of mice to mousepox offers promise of smallpox protection

...e United States and elsewhere who are on the front lines of a potential bioterrorist attack. "We are interested in not only overcoming an acute infection to save the individual, but at the same time helping to induce long-term immunity which will provide protection from a secondary infection," Karupiah sai...

JCI table of contents, 1 June 2004

...primary B cell tumors and transformed human B cell lines lack IL-12Rbeta2 transcript expression, but mainta...n IL-12Rb2 was transfected into transformed B cell lines and cells were treated with human recombinant IL-12 (hrIL-12). SCID-NOD mice injected with tumorigen...

Mite transmits viruses damaging to wheat

... allow early planting for optimal forage. Specific lines with virus and aphid resistance designed for early planting and grazing also need to be researched, Rush said. "I believe such varieties would be extremely useful and widely adapted in the Panhandle," he said. But new and focused research projec...

Moving targets: when it comes to patterns, motion gets factored in

...sible when the pattern moves behind the slits. Two lines of evidence from the multi-slit viewing experiments support the conclusion that early motion processing indeed contributes to pattern perception. First, Nishida found that pattern perception is more impaired by a mask or adaptation stimulus moving in...

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