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Tag: "base" at biology news

Did humans cause ecosystem collapse in ancient Australia?

...our research sees the ecological transition at the base of the food chain. Bands of people set large-scale fires for a variety of reasons, including hunting, clearing, and signaling other bands. Based on the evidence, human-induced change in the vegetation is the best fit to explain what happened at that ...

Clearing jams in copy machinery

...proofreader to catch any misspellings and cuts any base that is wrong. But Pol III is a perfectionist, and can stall if it encounters a problem. Pol IV, on the other hand, lays down bases without checking for errors, keeping the process moving even when Pol III gets stuck. The findings by O'Donnell and hi...

Genomatix, AAAS ink agreement

... into Genomatix's BibliospherePE pathway knowledge base and analysis system. AAAS, publisher of the jour...tix developed the BibliospherePE pathway knowledge base and analysis system. It allows for dynamic data-driven network/pathway construction and analysis bas...

After the yeast is gone bacteria continue to develop flavor of sparkling wine

...uires addition of sucrose and yeast strains to the base wine for a second fermentation in the bottle in which the wine is sold. The secondary fermentation produces carbon dioxide which dissolves in the wine and is perceived as bubbles when the bottle is opened, hence the term "sparkling". After the fermen...

Ants, not evil spirits, create devil's gardens in the Amazon rainforest, study finds

...sh cedar, were planted inside each garden near the base of a D. hirsuta tree actively patrolled by worker ants. A sticky insect barrier was applied to one cedar sapling to exclude ants, while the other sapling was left untreated. The researchers planted two additional saplings--one treated, one untreat...

Researchers propose measures to curb lion attacks in Tanzania

...een using bioreactors at the Synthecon Corporation base in Houston enabling them to produce stem cells sharing many of the same characteristics as cells found in embryos. Research has so far relied on so-called adult cells found in blood and bone marrow from birth onwards or cells grown from embryos. The ...

Insight into the processes of 'positive' and 'negative' learners

...een using bioreactors at the Synthecon Corporation base in Houston enabling them to produce stem cells sharing many of the same characteristics as cells found in embryos. Research has so far relied on so-called adult cells found in blood and bone marrow from birth onwards or cells grown from embryos. The ...

Researchers make 'embryonic-like' stem cells from umbilical cord blood

...een using bioreactors at the Synthecon Corporation base in Houston enabling them to produce stem cells sharing many of the same characteristics as cells found in embryos. Research has so far relied on so-called adult cells found in blood and bone marrow from birth onwards or cells grown from embryos. The ...

Genome Sequence for Haemophilus Influenzae Completed

...he cuticle surface structure of the underhairs and base of the less-abundant guard hairs are distinctively shaped to interlock, with wedge-shaped fins or petals fitting into wedge-shaped grooves between fins of adjacent hairs. Weisel and colleagues report their findings in the Canadian Journal of Zoology....

Otter adaptations: How do otters remain sleek and warm

...he cuticle surface structure of the underhairs and base of the less-abundant guard hairs are distinctively shaped to interlock, with wedge-shaped fins or petals fitting into wedge-shaped grooves between fins of adjacent hairs. Weisel and colleagues report their findings in the Canadian Journal of Zoology....

Microbe has huge role in ocean life, carbon cycle

...ned genomes ever discovered, with only 1.3 million base pairs ?the smallest ever found in a free living organism and a number that's literally tiny compared to something like the human genome. "SAR11 has almost no wasted DNA," Giovannoni said. "This organism is extremely small and efficient. Every genet...

Industrial contaminants spread by seabirds in High Arctic, new Canadian study shows

...the sediments of the shallow ponds that ringed the base of the cliffs, as monitors of past contaminant inputs. Noting that Canada has the longest coastline in the world, and seabirds are typically the dominant wildlife found in these coastal ecosystems, Dr. Blais says: "Most of Canada's coastline is at o...

US Army plans to bulk-buy anthrax

...ct is still at the pre-solicitation stage, and the base has not yet acquired the agent. They refused to say what it will be used for. ...

Survival of heart patients on beta-blockers varies greatly with genetic variation

... population possess a set of beta-2 genes with a C base at position 79, and 16 percent possess at set of beta-2 genes with an A base at position 46. In this study, ACS patients on beta-blockers with either of these two specific gen...

Biased reporting found in cancer prognostic studies

...rs. "These biases may create a spurious knowledge base of cancer predictors that may be of no use and may be potentially harmful," conclude the authors. However, they caution that their study has several limitations, including the fact that a lot of information could not be retrieved, making it impossibl...

Novel mechanism for DNA replication discovered

...ngs for replication. In other words, if a guanine base is on the original strand of DNA then its partner,...in Rev1 regardless of whether a guanine or another base is present on the DNA. "This is the first time we have seen a protein serving as a template for DNA...

Researchers track down cause of a disfiguring bone disorder

...tients. The deleted region is located about 35,000 base pairs "downstream" from SOST on human chromosome 17. While they found no difference in the activity of the SOST gene in early mouse embryos, the gene was dramatically "down-regulated," or less active, in adult mice carrying the deleted region than in...

Drawing with DNA: 'Bioart' illuminates genomics

...ithm called BLAST ?typically submitting 200 to 400 base pairs, or "letters" of genetic code, to be matched against the billions of letters for known genes. Searching for similarities that can shed light on functional or evolutionary relationships, scientists routinely use BLAST to churn through and produc...

Orientation and the egg

... the future body axes. "It would now make sense to base our future experiments on the premise that the mammalian egg neither has nor requires predetermination for successful development," explains Dr. Hiiragi. ...

Scientists take aim at virulent bacteria by decoding machinery of key control enzyme

...neck searching for the right chord, examining each base pair as it goes. Each time it finds the sequence G...ng the way it binds to the DNA and moves along the base pairs as it recognizes and methylates the A nucleotides," says Dr. Cheng. "Using this information we...

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