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Tag: "content" at biology news

Bacteria have their own immune system protecting against outside DNA

...ecognize foreign DNA on the basis of its increased content of adenine and thymine, the building blocks of DNA. "It has been a great mystery why disease-causing genes of bacteria usually contain more adenine and thymine," said Michael McClelland, professor and director of the Molecular Biology Program at the...

New method confirms importance of fungi in Arctic nitrogen cycle

... site have found a large range of nitrogen isotope content in plants and attributed the range to plants tapping into several different sources of nitrogen in the soil," says John Hobbie. "Our study indicates that the differences can be attributed mainly to the presence or absence of symbiotic mycorrhizal fun...

Researchers report technique for freezing and preserving genetically enhanced pig embryos

...l and that the new gene had altered the fatty-acid content in tissues from the piglets. With ten piglets from 163 frozen and preserved embryos, the researchers feel that their procedure appears to work well, although further studies will be needed to refine the technique. Dr. Prather and his team expect th...

Bacteria could make new library of cancer drugs that are too complex to create artificially

...eps of that process. By manipulation of the enzyme content of the bacteria, they aim to produce a range of different compounds based closely on the form of streptorubin B normally formed by the bacteria. Some of these analogues of streptorubin B could provide the basis for developing useful new anti cancer d...

Microcapsules like it hot and salty

...l the permeability of microcapsules using the salt content and the temperature of the solution. In order to a...ow spheres will change if the temperature and salt content are altered (Physical Review Letters, November 3, 2006). This opens up new possibilities for using t...

Steep oxygen decline halted first land colonization by Earth's sea creatures

... and they believe a precipitous drop in the oxygen content of Earth's atmosphere is responsible. "These tw...uring one of the lowest ebbs of atmospheric oxygen content of the last 500 million years, but he speculates that it took some time, until oxygen levels rose ap...

Wheat gene may boost foods' nutrient content

...ld wheat that increases the protein, zinc and iron content in the grain, potentially offering a solution to n...rity and increases grain protein and micronutrient content by 10 to 15 percent in the wheat varieties studied so far. To prove that all these effects were prod...

An artificial cornea is in sight, thanks to biomimetic hydrogels

...d Duoptix TM , the material can swell to a water content of 80 percent--about the same as biological tissues. It's made of two interwoven networks of hydrogels. One network, made of polyethylene glycol molecules, resists the accumulation of surface proteins and inflammation. The other network is made of mo...

Rising ocean temperatures, pollution have oysters in hot water

...of respiratory activity, the animal's blood oxygen content and mitochondrial function. The 28°C cadmium-ex...-exposed oysters showed a decrease in blood oxygen content with the higher temperature, but not the control group that was not exposed to cadmium," Lannig said...

Giant insects might reign if only there was more oxygen in the air

...alf-foot wing spans, for example. The air's oxygen content was 35% during this period, compared to the 21% we breathe now, Kaiser said. Researchers have speculated that the higher oxygen concentration allowed insects to grow much bigger. Tubes carry oxygen First, a bit of background: Insects don't br...

Evolution and the workaround

...ivision. When the researchers analyzed the genetic content of these evolved strains, they found that those who were best at cell division had accumulated multiple copies of many of their chromosomes. Intriguingly, cancer cells also accumulate extra chromosomes as they become more aggressive. The theory ...

Eating protein boosts hormone that staves off hunger

...on. "We've now found that increasing the protein content of the diet augments the body's own PYY, helping t...w study. Scientists have known that high-protein content meals make people feel more full and reduce food intake, resulting in improvements in weight loss an...

Are genomic technologies the answer to world hunger?

...ology has the potential to improve the nutritional content of food crops and, crucially, resistance to insects and disease. This could lead to improved yields of food crops for both human and animal consumption. Researchers are also working on 'molecular farming' ?production of pharmaceutical products in pl...

Uncovering DNA's 'sweet' secret

...ut Vanderbilt biochemist Martin Egli, Ph.D., isn't content to simplystudy these molecules as they are. He wants to know why they are the way they are. "These molecules are the result of evolution," said Egli, professor of Biochemistry. "Somehow they have been shaped and optimized for aparticular purpose." ...

Plant studies reveal how, where seeds store iron

...scovery for scientists working to improve the iron content of plants. Their research helps address the worldw... largely unexplored target for increasing the iron content of seeds. Such nutrient-rich seeds would benefit both human health and agricultural productivity." ...

German researchers develop first non-invasive test to measure skin aging

...es. "You would like to measure changes in collagen content over time," Dr. Koehler said. "Moreover, current t... easier. "Some cosmetics are thought to change the content of collagen in the skin," Dr. Koehler said, "but until now, to measure that you had to cut out a pie...

Plant studies reveal how, where seeds store iron

...scovery for scientists working to improve the iron content of plants. Their research helps address the worldw... largely unexplored target for increasing the iron content of seeds. Such nutrient-rich seeds would benefit both human health and agricultural productivity." ...

Unique tomatoes tops in disease-fighting antioxidants

...working on ways to enhance the fruit's antioxidant content and composition," Schwartz continued. The findings appear in a recent issue of the Journal of Agricultural and Food Chemistry. Lycopene is a carotenoid that contains a variety of related compounds called isomers. Isomers share the same chemica...

Cancer cells forming blood vessels send their copper to the edge

...inney and her colleagues then correlated elemental content with cellular structures. "Our findings were ve...ad implications on the regulation of the metal ion content in metal-binding proteins. If such dramatic changes in where cellular copper is stored and used can ...

Brain works more chaotically than previously thought

...mate travel to the axon membrane and release their content into the brain. Glutamate is one of the most important neurotransmitters, being released when signal transmission occurs at synapses. The researchers were able to demonstrate that certain cells in the white matter react to glutamate: the precursor to...

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