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Tag: "buffer" at biology news

ASU research shows connection between testosterone, dietary antioxidants and bird coloration

...d Ardia describe their findings in “Do carotenoids buffer testosterone-induced immunosupression" An experimental test in a colorful songbird,” in the current issue (June 6, 2007) of Biology Letters, a journal of the Royal Society, London. The researchers experimentally examined the relationship between ...

Hearts of male and female rainbow trout are different

...ted in a respiration cell containing an oxygenated buffer solution with glucose as the energy substrate). Oxygen consumption was measured using a calibrated oxygen electrode and data acquisition system; or (2) electrically-paced (i.e., ventricle strips were electrically-stimulated at physiological rates and...

Healthy coral reefs hit hard by warmer temperatures

...orals, which support commercial marine species and buffer low-lying coastal areas. "More diseases are infecting more coral species every year, leading to the global loss of reef-building corals and the decline of other important species dependent on reefs," said lead study author John Bruno at UNC. "We'v...

Cancer stem cells linked to radiation resistance

...ls, called cancer stem cells, help brain tumors to buffer themselves against radiation treatment by activating a "repair switch" that enables them to continue to grow unchecked, researchers at Duke University Medical Center have found. The researchers also identified a method that appears to block the cell...

Even when faint, ovary scent draws sperm cells

...ng the height of the source medium, in this case a buffer solution. The researchers affixed a microscope and camera to the device and then recorded video of the sperm during assays. "We combined in a microfluidic device the ability to generate a chemical gradient with transporting sperm cells to evaluate ...

Brazil creates buffer zone around coral reefs off Atlantic coast

The Brazilian government has created an official buffer zone around the Abrolhos National Marine Park to p...ly richest coral reefs in the South Atlantic. The buffer zone, created by Brazil's Institute of Environment and Natural Resources (IBAMA), encompasses nearly...

Biodiversity key to sustainable biofuel according to University of Minn. researcher's findings

...diversity and root mass. Roots store nutrients and buffer against climate variations. Prairie plants, which are perennials, have far more root mass than crops such as corn, which must be replanted annually. ...

Climate change: The rice genome to the rescue

...very high yielding rice that will provide a supply buffer for poor communities during periods of change. "We need to be able to protect poor people from the harmful effects of climate change, and rice is especially important because most of the world's poor depend on it," he added. "We also need to ensure...

North & South American researchers find architectural abnormalities in T. cruzi ribosome

...irst, the researchers freeze an ultrathin layer of buffer with purified ribosomes so quickly that the water has no chance to crystallize and damage the ribosomes. Then, the frozen sample is imaged with an electron beam in the transmission electron microscope. A CAT scan takes readings of a single body from...

Toxic flood lifts lid on common urban pollution problem

...pecially trees also creates aesthetically pleasing buffer zones, providing storm water flooding control and other benefits. Finally, cities can use high-tech street sweeping equipment that is very effective at capturing pavement contaminants. "If you pick up this potentially toxic material before it gets ...

Microreactor efficiently regenerates cofactors for biocatalysis

... which two liquid streams (a reactant stream and a buffer stream) merge and flow laminarly between two electrodes without mixing. By adjusting the flow rates of the two streams, the researchers can focus the reactant stream close to the cathode, and a normally unfavorable reaction equilibrium is driven into...

Breakthrough: Scientists create world's tiniest organic particles

...es we want and gently wash them off the molds with buffer solutions into vials or other containers to concentrate them. Then they can be injected." DeSimone, his colleagues, UNC and others have formed a new company, Liquidia Technologies Inc., with $2.5 million in angel funding and venture capital to furth...

Key to elephant conservation is 'in the sauce'

...oject director for the EPDT. "They can be grown as buffer crops to prevent crop-raiding and then be harveste...otential crop raiders in two ways: as a protective buffer crop to surround core crops of maize, sorghum and millet; and as an ingredient in a spray to drive a...

Rabies spread speeds up

...bid animal was detected - 11 kilometers beyond the buffer zone - in northeastern Ohio. By modelling the spread of past outbreaks, the authors had already shown that local transmission was significantly reduced when townships were separated by geographical barriers. The authors incorporated the likely effect...

Man-made wetland's effectiveness similar to natural marsh

... the "kidneys" of the environment, wetlands act as buffer zones between land and waterways. They also act as sinks ?wetlands filter out chemicals in water that runs off from farm fields, roads, parking lots and other surfaces, and hold on to them for years to come. But the jury is still out on how long a w...

U-M team recovers ancient whale in Egyptian desert

... that all of us make in our bodies all the time to buffer our metabolic flexibility. It's what allows our core temperature to stay at 98.6 degrees, regardless of whether we're in Alaska or Tahiti," Roth said. In addition to mice, Roth and colleagues in previously published work have demonstrated the abilit...

Buying Time Through Hibernation on Demand

... that all of us make in our bodies all the time to buffer our metabolic flexibility. It's what allows our core temperature to stay at 98.6 degrees, regardless of whether we're in Alaska or Tahiti," Roth said. In addition to mice, Roth and colleagues in previously published work have demonstrated the abilit...

Gray wolves maintain the food chain in winter

... will decline with shorter winters. But wolf kills buffer these shortages, providing meals that could determ...rchers can measure the magnitude of this predicted buffer effect. The models described here can guide their efforts and help species adjust to major environme...

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