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Tag: "stable" at biology news

A hope for oil spill bioremediation

... taking place at the contaminated sites. They used stable isotopes (13C/12C) to determine the origin of dissolved inorganic carbon (DIC) in control and contaminated coastal marine water samples. Due to its biological origin, crude oil is very depleted in 13C. Therefore, its biodegradation product CO2 will a...

Venom doc tracks down snake bioweapons

...d and modified into toxins where those with a very stable molecular structure ?those that are rich in the amino acid cysteine, which enables proteins to form intramolecular disulfide linkages. "These structures provided an excellent framework for the 60-80 million years of 'evolutionary tinkering' that have...

Engineers improve plastic's potential for use in implants by linking it to biological material

...o know," Schmidt said, referring to the need for a stable attachment between polypyrrole and biological molecules that T59 would be used to link to. Schmidt's laboratory intends to study T59 as a linker to other molecules in the future, possibly including vascular endothelial growth factor, which stimulate...

Ancient DNA helps clarify the origins of two extinct New World horse species

...h mutation rates, the patterns of mutations remain stable over thousands of generations. The mtDNA analysis of the South and North American horses provided evidence that stilt-legged horses, the Hippidion genus, and caballine, or true horses, all arose from a common lineage. The authors showed that the Hip...

Brain Scan Study of Smokers Reveals Signature of Craving

...garettes. Smokers who noted fewer cravings showed stable brain responses to the same drug cues, despite hou...up, smokers' brain responses to drug cues remained stable regardless of the duration of time since their last cigarette, found the researchers. However, furth...

Cancer related gene p53 not regulated as indicated by previous tissue culture research

...as unstable when no DNA damage was present and was stable and fully functional when needed to halt the cycle cell to repair DNA damage or to induce apoptosis. "It came as a complete surprise. We even used a system that would have allowed us to switch on the modified p53 protein at will because we feared th...

UN: World in big ecological mess

...th, such as fresh water, clean air or a relatively stable climate, are being degraded or used unsustainably, and the situation could become significantly worse during the first half of this century, according to the study. "Only by valuing all our precious natural and human resources can we hope to build a...

Amazon source of 5-year-old river breath

...ical study has used both radioactive carbon-14 and stable carbon-13 isotopes to address these questions. Funding from the Center for Accelerator Mass Spectrometry at Lawrence Livermore National Laboratory made the analysis by Mayorga and Aufdenkampe possible. The samples were collected by Richey's research ...

Speak up: Louder neurons form more connections

...while neighboring neurons formed a large number of stable connections. When the fish were five days old, the green neurons had a smaller, less complex arbor than those of neighboring neurons. “We know that the arbor should occupy a certain amount of space, and in these fish it doesn’t take up that much spa...

Confirmation of human protein interaction data by human expression data

...while neighboring neurons formed a large number of stable connections. When the fish were five days old, the green neurons had a smaller, less complex arbor than those of neighboring neurons. “We know that the arbor should occupy a certain amount of space, and in these fish it doesn’t take up that much spa...

Deep sea algae connect ancient climate, carbon dioxide and vegetation

...dioxide between 45 - 25 million years ago based on stable isotopes of carbon in a National Science Foundation study reported in Science Express. "Through the energy we consume, each of us makes a contribution to increasing greenhouse gasses, such as carbon dioxide and methane, in the Earth's atmosphere," s...

Invasive parasite destroying fish species

...dioxide between 45 - 25 million years ago based on stable isotopes of carbon in a National Science Foundation study reported in Science Express. "Through the energy we consume, each of us makes a contribution to increasing greenhouse gasses, such as carbon dioxide and methane, in the Earth's atmosphere," s...

Stem cells grown in lab mirror normal developmental steps

...dioxide between 45 - 25 million years ago based on stable isotopes of carbon in a National Science Foundation study reported in Science Express. "Through the energy we consume, each of us makes a contribution to increasing greenhouse gasses, such as carbon dioxide and methane, in the Earth's atmosphere," s...

Looks matter to female barn swallows

...ur looks and status long after we have established stable relationships." Barn swallow ( Hirundo rustica erythrogaster ) males have a wash of reddish-chestnut color from their throats to their bellies, and this color varies among birds from very pale red-brown to a dark rusty-red. Like many songbirds, hal...

HIV Therapy Greatly Extends Life of Key T Cells, Scientists Find

...less chemical label, deuterium (a non-radioactive, stable isotope), for five days. Nine volunteers were HIV-positive but had never received IL-2; 15 volunteers were HIV-positive and had received between three and 28 courses of IL-2; and eight volunteers were HIV-negative. Deuterium is incorporated into the...

Chemical 'band-aid' prevents heart failure in mice with muscular dystrophy

...er a 20 percent stretch, control myocytes remained stable and showed no fluorescence, while myocytes from mdx mice became unstable, started shaking and showed a steady increase in fluorescence, providing direct evidence for membrane damage. When U-M scientists repeated the stretch test after bathing both t...

AACR Favors 'full spectrum of stem cell research biology'

...ouraging grant-making institutions to "work toward stable and sufficient funding for meritorious stem cell projects, free of political uncertainty, so that young investigators are encouraged to devote their careers to this important field." Said Nelson, professor in the departments of Oncology, Urology, Ph...

New markers of climate change

... in Cambridge has been measuring the levels of two stable isotopes, 13C and 18O in the organic material and leaf-water of the plants. These isotopes accumulate in the plant over time and are indicators of photosynthesis and water evaporation, respectively. Because the plants are subjected to conditions such...

Time and money make a difference in endangered species recovery

...istration were much more likely to be improving or stable than those receiving less funding. This study emphasizes the need to consider the ways in which agencies administer and the U.S. Congress funds the Endangered Species Act in judging whether the law is a success or failure in recovering biodiversity....

Metal-containing compounds show promise as HIV weapon

...king. Other advantages are that the compounds are stable and can be modified in many ways by attaching othe...h may reveal that one modified version may be more stable or less toxic than another, for example.These compounds were also found to bind to the protease in a...

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