material 2 7

Tag: "material" at biology news

'Acid rain' and forest mass: Another perspective

...ugh the forest canopy), and litterfall (vegetable material fallen from trees: leaves, twigs, fruit, and so on), the first 25 cm of mineral soil and green foliage were taken and analysed chemically, according to standard protocols. The location of parcels was carried out as a function of their distance from d...

Double trouble: Cells with duplicate genomes can trigger tumors

...e chromosomes in the nucleus of the cell carry the material of heredity, or genes. In 1914, he published what Pellman calls an "amazingly accurate and prescient" treatise suggesting, among other things, that genetic instability was a cause of malignant tumors. One way to obtain this lack of chromosomal inte...

Science's Breakthrough of the Year: Watching evolution in action

...onary history. The two studies give scientists new material for studying conditions from AIDS to heart disease...th rocks and meteorites that resemble the starting material of the solar system and found that their atoms were significantly different. So where did Earth get ...

Role of microRNA identified in thyroid cancer

...e role for miRNAs. MiRNAs are smidgens of genetic material no longer than 22 or so nucleotides in length. A gene, in comparison, can be tens of thousands of nucleotides long. Scientists used to think miRNAs were parts of long stretches of functionless, "junk" DNA in the genome. But Dr. Huiling He, a resear...

The shape of things to come: Morphology database going global

...ts that this is a better way of working with their material and presenting their research. It's a matter of having a system that works well with lots of interesting images. That will go a long way to change people's attitudes." Because journals often do not publish all the images that illustrate an article, ...

Scientists pinpoint inflammation gene

...t-loss organization whose members provided genetic material for analysis. Dr. Kissebah practices at Froedtert Hospital, a major teaching affiliate of the Medical College. Other scientists from SFBR, ChemGenex, Deakin University (Geelong, Australia) and the International Diabetes Institute (Melbourne, Austral...

Sperm stem cells closer to being like embryonic stem cells

...s egg and sperm and their precursors whose genetic material can be passed to offspring. "The ability to manipulate male germ-line stem cells and get them to grow and self-renew is a major step," said Dr. Garbers, a Howard Hughes Medical Institute investigator at UT Southwestern. "We're only one step removed...

Virtual microscopy project wins educational technology award

...ially within pathology and hematology. Educational material produced by the research group has already been incorporated into the pathology teaching at the University of Helsinki. ...

Islands in the Genome Promote Speciation

...ws that in spite of possible cross-flow of genetic material (natural hybrids between the two forms are found at a low frequency) between two populations, the populations can still be accumulating differences in their genomes—differences that could eventually lead to the formation of new species. Comparing res...

Adult stem cells aid recovery in animal model of cerebral palsy

...ws that in spite of possible cross-flow of genetic material (natural hybrids between the two forms are found at a low frequency) between two populations, the populations can still be accumulating differences in their genomes—differences that could eventually lead to the formation of new species. Comparing res...

Scientists sequence DNA of woolly mammoth

... from the organism's mandible, its jaws. The bone material used in this study is approximately 28,000 years o...sing finding, as it demonstrated that the analyzed material was frozen for more than 10,000 years before the maximum of the last ice age. The research team use...

Microbes under Greenland Ice may be preview of what scientists find under Mars' surface

...mall asteroids colliding with Mars and churning up material from a suitable depth, so if you looked around the rim of a crater and scooped up some dirt, you might find them if you land where the methane oozing out of the interior is highest." Price and his colleagues published their findings last week in the...

New, unique microscope for nanotech

...t to get information about the bulk structure of a material and to measure the arrangement of atoms at the surface. The tip of the atomic force microscope can also be used as a probe to nudge cells, or place atoms or molecules into new, microscopic patterns. The project includes 24 UC Davis faculty from the ...

Texas scientists discover how a hepatitis C protein promotes liver cancer

...s "replicon," a large piece of hepatitis C genetic material that is able to reproduce itself in cultured cells and also able to produce proteins made by hepatitis C viruses. "The replicon experiments enabled us to identify a protein known as NS5B that attaches to the retinoblastoma protein, a critical tumor s...

Preclinical study of a new brain tumor therapy

...e). The scientists then selected a type of genetic material (a nucleic acid) associated with viral infections and linked it to a compound that could bind to EGFR. As a result of the defence mechanisms that have evolved to protect mammalian cells from viruses, cells are programmed to die once they take up this...

MicroRNA may have fail-safe role in limb development

...- a finding that sheds light on perplexing bits of material once dismissed as genetic "junk," say scientists a...of years of evolution. More recently, this genetic material is suspected to be part of an intricate mechanism that helps repress about one-third of our 25,000 g...

Engineers discover why toucan beaks are models of lightweight strength

...n. The Meyers team decided to prospect for a novel material in toucan beaks because they are both long and thick. Emerald Forest Bird Gardens, a California breeder of exotic birds, provided beaks from toucans that had died from natural causes to Meyers's team. They analyzed the beaks' density, stiffness, hard...

Common molecular 'signature' identified in solid tumors

...ecular "signature" made up of tiny bits of genetic material called microRNA (miRNA) that target key cancer gen... expression. For years, these tiny bits of genetic material went unnoticed ?nestled within vast stretches of the genome that appeared to be non-functional. They...

Bioengineers create stable networks of blood vessels

.... The hydrogel is a three-dimensional, sponge-like material -- highly water-saturable, with a structure of connected pores for cells to grow on and through. Second, they seeded the hydrogel scaffolds with endothelial cells that make up blood vessel structure along with nerve progenitor cells from the brain....

Cellular scale drug delivery from the inside out

...move the drug from the outer surface. The type of material used for the end caps, how they're held in place, and how they're released is the focus of Lin's work. The caps can be dendrimers, biodegradable polymers, genes, proteins, metallic nanoparticles, or semiconductor nanocrystals ?also known as quantum d...

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