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Scientists Determine What Makes an Orangutan an Orangutan

By Guest PostJanuary 28, 2011Nature, Scienceadam siepel, biogeography, borneo, devin p locke, evolution of primates, fruit fly, genes, genetic code, genetic diversity, genome, genome sequencing of primates, humans, island of origin, malay term, mammals, man of the forest, map, model organisms, orangutan genome, orangutans, reed beaman, scientists, sumatra

*New map of the genetic code of endangered orangutans yields important new conservation tools and insights into evolution*

For the first time, scientists have mapped the genome–the genetic code–of orangutans. This new tool may be used to support efforts to maintain the genetic diversity of captive and wild orangutans. The new map of the orangutan genome may also be used to help improve our understanding of the evolution of primates, including humans.

Partially funded by the National Science Foundation, the orangutan study appears in the Jan. 27 issue of Nature. It was conducted by an international team of scientists led by Devin P. Locke of the Genome Center at Washington University. (more…)

Like Humans, Amoebae Pack a Lunch Before They Travel

By Guest PostJanuary 25, 2011Nature, Scienceagriculture, amoebae, bacteria, beneficial bacteria, biologists, david queller, debra brock, dictyostellum discoideum, farmer amoebae, george gilchrist, harmful bacteria, joan strassmann, migratory systems, slime molds, social amoebae, strains of bacteria, tracy douglas, tuberculosis bacteria

*Amoebae increase survival odds through rudimentary form of agriculture; finding has implications for human diseases*

Some amoebae do what many people do. Before they travel, they pack a lunch.

In results of a study reported in the journal Nature, evolutionary biologists Joan Strassmann and David Queller of Rice University show that long-studied social amoebae Dictyostellum discoideum (commonly known as slime molds) increase their odds of survival through a rudimentary form of agriculture. (more…)

Go Figure: Math Model May Help Researchers with Stem Cell, Cancer Therapies

By Guest PostJanuary 24, 2011Science21st century, algorithm, alzheimer, brain tumors, brent reynolds, cancer cells, cancer stem cells, diseases, geoffrey ericksson, harley kornblum, joel e cohen, loic p deleyrolle, math, mathematical steps, microscopes, new microscope, parkinson, progressive diseases, protein assays, queensland brain institute, stem cells, therapeutics

GAINESVILLE, Fla. — The difficult task of sorting and counting prized stem cells and their cancer-causing cousins has long frustrated scientists looking for new ways to help people who have progressive diseases.

But in a development likely to delight math teachers, University of Florida researchers have devised a series of mathematical steps that accomplishes what the most powerful microscopes, high-throughput screening systems and protein assays have failed to do — assess how rapidly stem cells and their malignant, stemlike alter egos increase their numbers. (more…)

Study Reveals Arab American Views on Organ Donation

By Guest PostJanuary 23, 2011Culture, Scienceaasim i padela, arab american community, arab americans, arabic language, arabic media, arabs, christian arab americans, detroit arab american study, muslim arab americans, organ donation, positive organ donation beliefs, Social networking, university of michigan

*New University of Michigan research shows higher education, religion, income levels influence Arab American support of organ donation*

ANN ARBOR, Mich. – U.S. organ procurement organizations looking to increase donation rates among Arab Americans can turn to new University of Michigan Health System research for recruitment ideas.

U-M researchers identified various factors – from education and income levels to gender and religion – that may predict how members of this population view organ donation, says lead study author Aasim I. Padela, M.D., an emergency physician and a Robert Wood Johnson Foundation Clinical Scholar at the U-M Health System. (more…)

NASA’s Voyager 2 spacecraft

By Guest PostJanuary 23, 2011Scienceairborne telescopes, atmosphere, crater, earth, ed stone, icy rings, magnetic north, Miranda, mysterious seventh planet, NASA, neptune, saturn, south poles, Space, stars, suzanne dodd, uranian equator, uranus, voyager 2 spacecraft, voyager spacecraft

As NASA’s Voyager 2 spacecraft made the only close approach to date of our mysterious seventh planet Uranus 25 years ago, Project Scientist Ed Stone and the Voyager team gathered at NASA’s Jet Propulsion Laboratory, Pasadena, Calif., to pore over the data coming in.

Images of the small, icy Uranus moon Miranda were particularly surprising. Since small moons tend to cool and freeze over rapidly after their formation, scientists had expected a boring, ancient surface, pockmarked by crater-upon-weathered-crater. Instead they saw grooved terrain with linear valleys and ridges cutting through the older terrain and sometimes coming together in chevron shapes. They also saw dramatic fault scarps, or cliffs. All of this indicated that periods of tectonic and thermal activity had rocked Miranda’s surface in the past. (more…)

New Device May Revolutionize Computer Memory

By Guest PostJanuary 21, 2011Science, Technologydouble floating-gate, flash drives, server farms, unified device, volatile devices

Researchers from North Carolina State University have developed a new device that represents a significant advance for computer memory, making large-scale “server farms” more energy efficient and allowing computers to start more quickly. (more…)

A Nanoscale Rope, and Another Step Toward Complex Nanomaterials That Assemble Themselves

By Guest PostJanuary 19, 2011Scienceblock copolymer, molecular scale, nanoscale ropes, nanoscale wires, synthetic polymers

Scientists at the U.S. Department of Energy’s Lawrence Berkeley National Laboratory (Berkeley Lab) have coaxed polymers to braid themselves into wispy nanoscale ropes that approach the structural complexity of biological materials. (more…)

Improved Measurements of Sun to Advance Understanding of Climate Change

By Guest PostJanuary 17, 2011Environment, Scienceamount of energy, anthropogenic causes of climate change, calibration facility, climate change, climate respond, earth, global temperature, global warming, greg kopp, industrial revolution, judith lean, laboratory, NASA, optical design, planet, satellite data, solar fluctuations, solar irradiance, solar radiation and climate experiment spacecraft, sorce, spacecraft easurements, sun, tim, total irradiance monitor, total solar irradiance, tsi, tsi value

WASHINGTON — Scientists have taken a major step toward accurately determining the amount of energy that the sun provides to Earth, and how variations in that energy may contribute to climate change.

In a new study of laboratory and satellite data, researchers report a lower value of that energy, known as total solar irradiance, than previously measured and demonstrate that the satellite instrument that made the measurement—which has a new optical design and was calibrated in a new way—has significantly improved the accuracy and consistency of such measurements. (more…)

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