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Tag: "surface" at biology news

New technique may speed DNA analysis

...le strands of DNA essentially self-assemble upon a surface to duplicate a nano-scale pattern made of their complementary DNA strands. The duplicates are identical to the master and can thus be used as masters themselves. This increases print output exponentially while enabling the reproduction of very comple...

New technique helps identify multiple DNA regulatory sites

...le strands of DNA essentially self-assemble upon a surface to duplicate a nano-scale pattern made of their complementary DNA strands. The duplicates are identical to the master and can thus be used as masters themselves. This increases print output exponentially while enabling the reproduction of very comple...

Newly Discovered Role for Heart Response Enzyme May Yield Better Heart Failure Therapy

...s the function of beta-adrenergic receptors on the surface of heart cells. Such receptors are protein switches that nestle in the cell membrane and that are activated by the hormone adrenaline to enhance the heart's pumping action in response to exercise or stress. In heart failure patients, chronic stress ...

Neanderthal teeth grew no faster than comparable modern humans'

...tions ?called perikymata ?record new growth on the surface of the tooth. Researchers know from earlier work...ers tallied the number of perikymata on the enamel surface of the teeth. Guatelli-Steinberg said that the results showed that the enamel formation times for ...

Opiate cocktail may spare cells from morphine's dark side

...tion of the drug with a specialized protein on the surface of cells, the mu opioid peptide receptor, or "MOP"...t the activated receptor's persistence at the cell surface leads to a compensatory overactivation of a particular signaling pathway in the cell--a signaling im...

Results of world's first gene therapy trial for arthritis show approach safe, feasible

...l studies, synovial cells have a receptor on their surface that's a perfect fit for a particular cytokine, in...ssed large amounts of the gene were present at the surface of the synovial tissue and produced significantly less of the inflammation-provoking IL-6 and PGE 2 ...

Researchers Create DNA-Based Sensors for Nano-Tongues and Nano-Noses

...tection systems in almost any location. The sensor surface is also self-regenerating, with each sensor lastin...unique material in which every atom is on both the surface and the interior. Although nanotubes have many applications, they are extremely sensitive to electro...

Computers close in on protein structure prediction

...end to dive toward the watery world of the protein surface while others take cover inside the protein. The co... problem of trying to find the lowest point on the surface of the Earth for the first time. A simple way to find the lowest place on the planet is to send out ...

Sensor web simulation investigates technique to improve prediction of pollution across the globe

...our weather occurs and it extends from the Earth's surface to roughly the cruising altitude of a passenger jet - about 40,000 feet. In some cases air pollutants have natural causes such as lightning induced wildfires that can emit large plumes of particulates into the troposphere. Fossil fuel burning in indu...

Researchers report breakthrough against world’s deadliest viruses

... researchers developed the vaccines by replacing a surface protein in an animal pathogen, called vesicular stomatitis virus, with a surface protein from either the Ebola or Marburg viruses. Following extensive work, including trials with mi...

Disappearing arctic lakes linked to climate change

... Peninsula near Council, Alaska and found that the surface pond area there had decreased over the last 50 yea...hey shrank significantly. The overall loss of lake surface area was a loss of approximately 6 percent. In addition, 125 lakes vanished completely and are now r...

Errors in the measurement of global warming corrected

...ince the 1970's, while temperatures at the Earth's surface are rising. For the last 40 years radiosonde temp...odels predict a close link between atmospheric and surface temperatures, there has been a large difference in the actual measurements," said Steven C. Sherwood...

How HIV disables the cells' call for help

... shown how a part of a protein on the virus' outer surface interferes with the cells' normal immune response.... outer walls. A virus, especially one with its own surface equipment for seeking out specific T cells, would be hard-pressed to slip past these receptors witho...

Skull study sheds light on dinosaur diversity

...skulls with many openings and grooves on the outer surface of their snouts," said Wilson, who worked closely with U-M Museum of Paleontology artist Bonnie Miljour over the course of a year preparing the paper's many illustrations of the skull reconstruction. "Blood vessels and nerves passed through these hol...

Trio of plant genes prevent 'too many mouths'

...genomic map. Stomata are microscopic pores on the surface of plants that open to allow plants to take in carbon dioxide from the air for photosynthesis. They close when there is the danger that the plant tissue may lose too much moisture. "Specialized cells open and close the stomata, much like opening and...

Hidden sponges determine coral reef's nutrient cycle

...avities. Further the cavities were found to have a surface area eight times greater than that of the coral re...erers And according to Scheffers a larger living surface also means a larger filtering surface. Sponges filter the water. They take up planktonic particles s...

Learning how SARS spikes its quarry

...irus's spike protein attaches to a receptor on the surface of target cells. Attachment of the spike protein p...e spike protein fragment showed a slightly concave surface that fits a complementary surface on the receptor, said Harrison. There was nothing surprising about...

Acid water in East Java threatens biodiversity and local welfare

...crater into the sea, which with its enormous water surface would not suffer any detrimental effects due to this small quantity of acidic water. Lohr wants to hold discussions with local authorities, other researchers and companies in order to arrange such a diversion or another solution. The biologist recent...

Breast tumors in mice eradicated using cancer vaccine

...ssing pathway that feeds antigenic peptides to the surface of the cell for recognition by killer T cells is g...lls that can recognize the HER-2/Neu pieces on the surface of the tumor cell. In addition, the Penn team helped the immune system along by fusing the tumor ant...

UCLA scientists reveal how Nipah virus infects cells

...st bind to a viral-specific receptor on the cell's surface in order to penetrate it. Lee's team identified a cell receptor called Ephrin-B2 as the key used by the Nipah virus to unlock the cells. Located on brain cells and cells lining the blood vessels, Ephrin-B2 is critical to nervous system development a...

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