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When Cells Hit the Wall: UCLA Engineers Put The Squeeze on Cells to Diagnose Disease

By Guest PostMay 6, 2012Health, Scienceaids, amander clark, balloon, cancer, cells, chemical tags, chronic inflammation, cytopathologist, daniel gossett, deformability cytometer, diagnose disease, dino di carlo, dna arrangement, elastic properties, extract information, henry tse, honey, immune disorder, immune system, infection, jian yu rao, mesothelial cells, microfluidic chip, nuclei, rubber balloon, shape, software, steven chu, Technology, ucla engineers, viscous, white blood cells

If you throw a rubber balloon filled with water against a wall, it will spread out and deform on impact, while the same balloon filled with honey, which is more viscous, will deform much less. If the balloon’s elastic rubber was stiffer, an even smaller change in shape would be observed.

By simply analyzing how much a balloon changes shape upon hitting a wall, you can uncover information about its physical properties.

Although cells are not simple sacks of fluid, they also contain viscous and elastic properties related to the membranes that surround them; their internal structural elements, such as organelles; and the packed DNA arrangement in their nuclei. Because variations in these properties can provide information about cells’ state of activity and can be indicative of diseases such as cancer, they are important to measure. (more…)

Advertisers: Think Twice Before Investing in Sponsorships

By Guest PostMay 5, 2012Technologyadvertiser, anna mcalister, aquafina, bottled water, brand, consumer, dasani, journal of advertising, michigan state university, old sponsor, olympic broadcasting, public relation, sponsorship, t bettina cornwell, university of oregon

EAST LANSING, Mich. — Companies that spend millions of dollars sponsoring events need to be careful how and when they spend that money, as often their return on investment is difficult to measure. And occasionally it even benefits their competitors.

In a paper recently published in the Journal of Advertising, a team of researchers led by a Michigan State University faculty member found that the average consumer may not have a clear memory for the current sponsor of an event, especially if this sponsor is taking over from another. (more…)

Spy Hackers

By Guest PostMay 5, 2012Politicsafghan president, afghan war, afghanistan, al qaeda, america, american espionage, american intelligence policy, Barack Obama, battlefield strategy, China, chinese hacker, digital age, george w. bush, hamid karzai, intelligence historian, iran, lies, matthew aid, middle east, north korea, osama bin laden, pentagon, russian linguist, sneaky guys, somalia, spies, spy hackers, university of delaware, us intelligence, yemen

Intelligence historian cites changing focus of American espionage

In the spy trade, predicting the future is a risky business at best, but experts believe that America’s intelligence efforts will focus on Iran, North Korea and China.

Matthew M. Aid, intelligence historian and expert on the National Security Agency, discussed the forces driving this emerging strategy during a talk on Wednesday, May 2, in Mitchell Hall.

Aid’s talk, “The Future of Intelligence and Espionage,” concluded the spring 2012 Global Agenda speaker series “Spies, Lies and Sneaky Guys: Espionage and Intelligence in the Digital Age.” (more…)

From Soil Microbe to Super-Efficient Biofuel Factory?

By Guest PostMay 5, 2012Environment, Scienceadvanced biofuel, arpa e program, berkeley lab, bioelectrochemical reactor, biofuel, bioplastic, chris chang, CO2, diesel fuel, electrode, electrofuel, energy source, harry beller, hydrocarbon, hydrogen, ketones, microbe, nathan hillson, organic compound, ralstonia eutropha, soil bacterium, steve singer, swapnil chhabra, team electrofuel, Technology

Berkeley Lab-led team explores a way to create biofuels, minus the photosynthesis

Is there a new path to biofuels hiding in a handful of dirt? Lawrence Berkeley National Laboratory (Berkeley Lab) biologist Steve Singer leads a group that wants to find out. They’re exploring whether a common soil bacterium can be engineered to produce liquid transportation fuels much more efficiently than the ways in which advanced biofuels are made today.

The scientists are working with a bacterium called Ralstonia eutropha. It naturally uses hydrogen as an energy source to convert CO₂ into various organic compounds. (more…)

Handful of Heavyweight Trees Per Acre Are Forest Champs

By Guest PostMay 5, 2012Natureandrew larson, biomass, carbon dioxide, dynamic process, fir, incense cedars, james freund, james lutz, little ice age, mark swanson, photosynthesis, plant tissue, sandra hines, sugar, temperate forest, trees, trunk, university of montana, university of washington, washington state university, yosemite national park

Big trees three or more feet in diameter accounted for nearly half the biomass measured at a Yosemite National Park site, yet represented only 1 percent of the trees growing there.

This means just a few towering white fir, sugar pine and incense cedars per acre at the Yosemite site are disproportionately responsible for photosynthesis, converting carbon dioxide into plant tissue and sequestering that carbon in the forest, sometimes for centuries, according to James Lutz, a University of Washington research scientist in environmental and forest sciences. He’s lead author of a paper on the largest quantitative study yet of the importance of big trees in temperate forests being published online May 2 on PLoS ONE. (more…)

Science Fair Winner Publishes New Study on Butterfly Foraging Behavior

By Guest PostMay 4, 2012Natureadrian duehl, agricultural fields, alexandra, alexandra sourakov, andrei sourakov, blue morpho, blue morpho butterfly, butterflies, butterfly, butterfly rainforest, clipper butterfly, ecology, electroantennography, evolutionary biology, fermented bananas, foraging behavior, gas chromatography, honey, insects, labial palpi, lepidopterist, mango, mass spectrometry, moths, pollinators, teenage daughter, university of florida

GAINESVILLE, Fla. — University of Florida lepidopterist Andrei Sourakov has spent his life’s work studying moths and butterflies. But it was his teenage daughter, Alexandra, who led research on how color impacts butterflies’ feeding patterns.

The research shows different species exhibit unique foraging behaviors, and the study may be used to build more effective, species-specific synthetic lures for understanding pollinators, insects on which humans depend for sustaining many crops.

In a study appearing online in April in the journal Psyche, researchers used multi-colored landing pads and baits in the Florida Museum of Natural History’s McGuire Center for Lepidoptera and Biodiversity on the UF campus to determine that some butterflies use both sight and smell to locate food, while others rely primarily on smell. (more…)

Acid Rain

By Guest PostMay 4, 2012Environmentacid rain, acidity of rain, delaware rain, rainwater

UD’s long-term monitoring shows 60 percent reduction in acidity of Delaware rain

Several decades ago, precipitation in Delaware was among the most acidic in the country. Pollutants in the air reacted with rainwater to sprinkle sulfuric, nitric and carbonic acids onto the ground below, affecting crops and ecosystems statewide. (more…)

Researchers Show Prebiotic Can Reduce Severity of Colitis

By Guest PostMay 4, 2012Healthbacterial infection, cells, colitis, colon cancer, elizabeth gardner, fiber supplements, galacto oligosaccharide, good bacteria, gos, gut, inflammation, inflammatory bowel disease, intestinal ailments, jenifer fenton, michigan state university, natural killer, prebiotic, probiotics, synthetic compound

EAST LANSING, Mich. — Researchers at Michigan State University have shown a prebiotic may help the body’s own natural killer cells fight bacterial infection and reduce inflammation, greatly decreasing the risk of colon cancer.

Prebiotics are fiber supplements that serve as food for the trillions of tiny bacteria living in the gut. When taken, they can stimulate the growth of the “good” bacteria. The evolution of prebiotic supplements (as well as probiotics, which are actual bacteria ingested into the system) provide new therapeutic targets for researchers and physicians. (more…)

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