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Tag: "bottom" at biology news

Discarded placentas deliver researchers promising cells similar to embryonic stem cells

...yer, with some cells choosing to spread out at the bottom of the culture dish thereby giving those cells just above them the best environment for replicating and for retaining their stem cell characteristics. With the addition of various growth factors, the authors report the amnion-derived cells could dif...

Past droughts geographically widespread in the West, according to tree-ring data

...oject's manager of Water Resource Operations. "The bottom line is that the Upper Colorado Basin and the Salt and Verde basins work together as one entire region." Tree-ring-based reconstructions of streamflow can peer back into time much further than the records available from stream-flow gauges. Ester sai...

'Sinkers' provide missing piece in deep-sea puzzle

... see them, it was in the form of a big glob in the bottom of the sediment trap, which they would typically throw out, assuming it was contamination." To estimate how much carbon these sinkers might be delivering to the seafloor, Robison first needed to find out how common they were. For ten years (from 199...

Slipping past the blood brain barrier: Research shows potential treatment for brain cancer

...es Online Early Edition the week of Aug. 22. "The bottom line is, if you can get drugs into the brain, you can cure brain cancer," says William A. Banks, M.D., professor of geriatrics in the department of internal medicine and professor of pharmacological and physiological science at Saint Louis University...

Beetle-inspired switch uses water for bonding

...rface tension, a water droplet moves to the top or bottom of a flat plate surface using electricity from electrodes. The electricity moves positively charged atoms, called ions, in the water through the minute capillaries of a thin disk of porous glass embedded in the plate. The water moves and wells up int...

New tool reveals secrets of migrating cells

...ls moving, be sure to check them out. Links at the bottom of the press release, added by me. Biologists have a new tool to track and videotape cells moving about inside living tissue. Called two-photon laser-scanning microscopy, it has revealed, for example, the dramatic difference between the random wan...

Researchers Discover That Microbes Can Produce Miniature Electrical Wires

...cter was discovered by Lovley in 1987 at the muddy bottom of the Potomac River in Washington D.C., and over the past 18 years his research has earned widespread media attention and major funding from government and private sources. The tiny organisms, widely found in soils and aquatic sediments, have demons...

Newly discovered genetic disease sheds light on body's water balance

...sts is to recognize the discrepancy and get to the bottom of the situation." First, Gitelman and his colleagues worked to find an innovative treatment for the two young patients. "When adults retain too much water we can treat them by restricting fluid intake," he said. "We can't do that with infants -- al...

Grass makes environmentally friendly biofuel

...less than with wood pelleting," says Cherney. "The bottom line is that pelletized grass has the potential to be a major affordable, unsubsidized fuel source capable of meeting home and small business heating requirements at less cost than all available alternatives." ...

Currents could disrupt ocean food chain

...the surface, forming a rich nutrient source at the bottom of the marine food web. There is growing concern ...veyer current works, the dead plankton sink to the bottom and are replaced at the surface with nutrient-rich water that encourages further production," Schmit...

Discovery clarifies role of peptide in biological clock

... part of the hypothalamus that can be found on the bottom of the brain just above the roof of your mouth where your optic nerves cross. There are roughly 10,000 neurons in this nucleus on either side of your brain. The timekeeping mechanism in these cells depends on daily cycles in gene activity. Herzog fo...

Road salt affects mitigation wetlands

...tested all six wetlands for salinity and looked in bottom sediment for non-biting midge populations because midges are good indicators of stress. "Last year all the wetlands went back to zero salinity in mid spring," says Silver. "We are not sure if this will continue as we do not know if the baseline will...

Oceans more vulnerable to agricultural runoff than previously thought, study finds

... The result is an oxygen-depleted dead zone at the bottom of the sea where few creatures can survive. A massive dead zone appears every summer in the Gulf of Mexico off the coast of Louisiana and Texas. Scientists believe that agricultural runoff from the Mississippi River plays a pivotal role in creating t...

Undesirable expatriates: Preventing the spread of invasive animals

... animal introductions may become more common. The bottom line-- vertebrate animals have a high rate of invasion success. Once established, they can act as biological pollutants that result in ecological and economic damages. "The best way to combat invasive species is to prevent them from being introduced....

Study: 'homemade' gene expression technology unreliable

...roarrays, acquiring data and other elements. "The bottom line is that if you use commercial platforms, you get very good interlaboratory consistency and correlation of data," Spencer said. "We've now entered a new era in which we can move forward confident that we have reliable platforms." And this is par...

Researchers devise way to mass-produce embryonic stem cells

...nsions, while cells growing on a flat surface ?the bottom of the flask ?could not. "Cells grown on a flat surface don't act like they would in the body," Yang said. "The growing surface affects how a cell forms, what it looks like and even how it expresses genes." Cells grown in the bioreactor could grow ...

New research indicates a 'troubled' greenhouse is brewing

...treeless abode of musk oxen and polar bears." The bottom line? A new Ice Age is probably the least of our worries. "Frostbite and snow-blindness are less likely to be in our future than heat stroke and malaria," Retallack asserts. "Mint julep, anyone?" Buried soils have long been known as sources of evid...

Ice core 'dipstick' indicates West Antarctic ice has thinned less than believed

.... The West Antarctic Ice Sheet once rested on the bottom of the bay all the way to its "grounding line" at the continental margin in the Ross Sea. However, that ice has retreated substantially in the last 20 millennia, at the same time Siple Dome was thinning. Part of the puzzle has been whether the ice st...

Weizmann Institute scientists develop a new approach for directing treatment to metastasized prostate cancer in the bones.

...se to color-making melanocytes that journey to the bottom of thehair follicle: That is where they tint the keratinocytes with theperson’s characteristic hue.By studying mice at progressively older intervals, Fisher and hiscolleagues discovered that as the rodents aged and their hair beganturning gray, the n...

Fundamental Finding Yields Insight into Stem Cells, Cancer; Opens Door to Drug Discovery

...se to color-making melanocytes that journey to the bottom of thehair follicle: That is where they tint the keratinocytes with theperson’s characteristic hue.By studying mice at progressively older intervals, Fisher and hiscolleagues discovered that as the rodents aged and their hair beganturning gray, the n...

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