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Tag: "surface" at biology news

Agricultural antibiotic use contributes to 'super-bugs' in humans

...ria are found in the air and soil around farms, in surface and ground water, in wild animal populations, and on retail meat and poultry. These resistant bacteria are carried into the kitchen on contaminated meat and poultry where other foods are cross-contaminated because of common, unsafe handling practices...

The making of a fat cell

...de fat cells. Integrins are a superfamily of cell surface proteins that are involved in binding to the extracellular matrix, a meshwork of protein and fiber supports outside of cells that can influence their behavior. "Fat cells require contact in order to stretch and change shape--becoming round cells abl...

System Drastically Cuts Down Botulism Detection Time

...de fat cells. Integrins are a superfamily of cell surface proteins that are involved in binding to the extracellular matrix, a meshwork of protein and fiber supports outside of cells that can influence their behavior. "Fat cells require contact in order to stretch and change shape--becoming round cells abl...

Short-term Bio Sensors Monitor From Afar

...de fat cells. Integrins are a superfamily of cell surface proteins that are involved in binding to the extracellular matrix, a meshwork of protein and fiber supports outside of cells that can influence their behavior. "Fat cells require contact in order to stretch and change shape--becoming round cells abl...

Key To Stem Cell Transplant Success Is Tricking Immune System

...de fat cells. Integrins are a superfamily of cell surface proteins that are involved in binding to the extracellular matrix, a meshwork of protein and fiber supports outside of cells that can influence their behavior. "Fat cells require contact in order to stretch and change shape--becoming round cells abl...

Researchers find ways to turn manure into power

...en said. "An even greater benefit is that frequent surface manure harvesting by scraping is an accepted method of dust control." ...

Discarded placentas deliver researchers promising cells similar to embryonic stem cells

...mniotic epithelial cells have many of the telltale surface markers that define embryonic stem cells, and also express the Oct-4 and nanog genes that are known to be required for self-renewal and pluripotency ?the ability to develop into any type of cell. Yet the authors are careful to point out that despite...

New technology shows our ancestors ate…everything!

...r, the microscopic pits and scratches on the tooth surface caused by use, offers a more accurate measurement of the surface's appearance and is described in the August 4 issue of Nature. "Paleontologists and physical anthropologists have had a somewhat naive view on diet, in part due to the limitations of t...

Stolen gene allows insect virus to enter cells

...at while viral F proteins naturally migrate to the surface of a host cell, F proteins native to the cell appear to stay on the inside. "Membrane fusion goes on all over the place inside the cell," Blissard says. "But fusion in cells is regulated by fairly large complexes of proteins. Viruses can accomplish m...

Oceans turning to acid from rise in CO2

...ulated that over the past 200 years, the pH of the surface seawater has declined by 0.1 units, which is a 30% increase in hydrogen ions. If emissions of CO2 continue to rise as predicted by the Intergovernmental Panel on Climate Change's IS92a scenario, there will be another drop in pH by .5 units by 2100, a...

Newly recognized gene mutation may reduce seeds, resurrect plants

...RST1. They found the gene while studying a unique surface wax mutant of Arabidopsis, a common laboratory research plant. All plants have a certain amount of wax overlaying leaves and stems. The abnormal plant, a mutant of RST1, had short, rounded leaves that turned purple during development, and then befor...

U-M scientists discover identifying markers for primitive blood-forming stem cells

...ical equivalent of a grocery store bar code on the surface of primitive, blood-forming stem cells in mice. Ca...ts, is to look for the presence or absence of cell surface receptor proteins expressed by a family of genes called SLAM. Scientists knew that the 10 or 11 gen...

Scientists discover new way to look at how molecules twist and turn on water

... and detergents bury their heads into the top-most surface of water, an insight expected to yield benefits s...y to be surrounded by water molecules at the water surface and their tails preferring to stick up out of the water, extending into the air or an adjacent oily ...

'License to kill' enables powerful immune attack cells in mice

...ajor hiscompatibility complex (MHC) class I on the surface of other cells. MHC serves as a kind of molecular I.D. badge, helping the natural killer cells to distinguish the self from an invader. But Yokoyama's group found that the inhibitory receptors switch roles during licensing. Although the structure of...

Method slashes quantum dot costs by 80 percent

...physical properties of a given solvent: viscosity, surface free energy and solubility of bulk cadmium selenide powder. ...

The right drug at the right time

...physical properties of a given solvent: viscosity, surface free energy and solubility of bulk cadmium selenide powder. ...

Modifications render carbon nanotubes nontoxic

...tudies with buckyballs, CBEN found that even minor surface modifications could dramatically reduce cytotoxici...with buckyballs, CBEN found that higher degrees of surface modification led to lower toxicity for SWNTs. "We now have two studies on carbon nanoparticles that...

Climate change will affect carbon sequestration in oceans, model shows

...," Jain said. "Eventually it will percolate to the surface and into the atmosphere." ...

Amphetamines reverse Parkinson's disease symptoms in mice

...ts on dopamine receptors ? protein switches on the surface of neurons -- to stimulate brain processes that affect movement, emotion, pleasure and mood. Parkinson's disease stems from the degeneration of neurons in a brain region that controls movement. That degeneration, in turn, leads to a shortage of the ...

How 'Dirt' Could Educate The Immune System And Help Treat Asthma

...," Jain said. "Eventually it will percolate to the surface and into the atmosphere." ...

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