Tag: "origin" at biology news

Scientists Trace The Origin Of "Idaho Potatoes"

...hat chemical analysis can determine the geographic origin of raw commodities and food products. According t...d the accuracy of the classification of geographic origin has beenexcellent. A nonprofit organization with a membership of more than 155,000 chemists andchem...

Researchers Discover Way To Grow New Kidneys In Rats

...s. Hammermansuspects this partly reflects the host origin of the kidney's blood vesselsbecause foreign blood vessels are a major stimulator of rejection. The use of adeveloping kidney also was key to reducing the immune response. A rat rejects anadult kidney from another rat within a week. "A rat kidney is...

International Research Team Announces Discovery Of Two Species Of Feathered Dinosaurs

...-dwelling dinosaurs and give new insights into the origin ofbirds. The discovery was announced by an interna...ossil Archaeopteryx as the key tounderstanding the origin of birds. Numerous significant fossil finds in thepast decade, including the discoveries announced ...

Priestly Gene Shared By Widely Dispersed Jews

...of Jewish male priests from different countries of origin incomparison with their Jewish male Levite and lay counterparts. The Y-chromosome is uniquely useful in this analysis because theY-chromosome of any individual can be traced back even over many generations toonly one male ancestor. This is n...

NASA Funds New Origin Of Life Center at Rensselaer Polytechnic Institute

...sselaer Polytechnic Institute for the study of the origin of life. Two otheruniversities in New York's Capit...l carry out interdisciplinary investigation of the origin andearly evolution of life, starting with stardust and the organic molecules formedin interstellar s...

Atmospheric Chemistry -- A Mysterious Isotope Effect In A Well-Known AtmosphericPollutant Discovered

... 17O signal gave the important indication that the origin of the effectmight not be associated with one of the various CO sources, but rather with itsremoval mechanism, reaction with OH. The observed anticorrelation betweenatmospheric CO concentrations and the 17O isotope excess over the year could beexplai...

Ancient 'Volcanic Winter' Tied To Rapid Genetic Divergence In Humans

... and others. The WeakGOE model proposes an African origin for modern humans about 130,000 yearsago, and cred...ew model resolves the paradoxof the recent African origin model: If we are all so recently "outof Africa," why don't we all look like Africans? "When our Afr...

14,000 Years Of Atmospheric Lead Emissions Recorded In Swiss Peat Bog As Published In Science Magazine

...Shotyk and his colleagues were able to identifythe origin of the lead pollution--for example whether most of the lead was fromdust in Scandinavia released as the glaciers receded or from lead ore broughtinto Europe from Australia and released through industrial use. The researchers found that the re...

Multi Drug Resistant-TB: Russian Economic Collapse Will Lead To Global Spread Of "Ebola With Wings"

...t is only a matter of time before MDR-TB ofRussian origin becomes a daily reality in other countries worldwide. The current Russian economic crisis will further deplete already strainedresources of public medicine. The resulting shortage of anti-TB drugs willinevitably lead to the massive practice of substa...

Whitehead Study Supports Existence Of Ancient RNA World, Helps Provide Insight Into Early Evolution Of Life

...ay people alike. "A fundamental question about the origin of life is whatclass of molecules gave rise to some of the earliest life forms" says Dr.Bartel. For years, scientists debated this question, some arguing that RNAmolecules were the progenitors and others arguing in favor of proteins. "It w...

The Fire Down Below: Extreme Heat-Loving Organisms May Be Keys To Molecular Evolution, Origin Of Life, New Book Argues

... could be a key to unlockingboth evolution and the origin of life itself. "It appears from studies ...n," they wrote. "We are far from understanding the origin andcharacteristics of the first living beings, which may have lacked even the mostfamiliar features ...

Fall Meeting: Updated Press Conference Schedule

...ind strong magnetic anomalies that are "fossil" in origin and occur much of the planet. The team has evidence that strong density waves in the atmosphere are stationary and may be related to topographic forcing despite the great altitude at what they are being detected. Presenter: Arden Albee, Project Scie...

Purdue Study Breathes New Life Into Question Of How Life Began

...that proteins mayhave played a leading role in the origin of life. Scientists, looking for clues as to how life began at a molecular level,have long considered nucleic acids, such as DNA and RNA, as the star players dueto their rare ability to replicate themselves and adapt to changes. But Purdue Un...

Study Associates Asteroid Or Comet Impact With Extinctions In Argentina

...esearch began as a simple project to determine the origin and age ofthe escorias. However, the work identified a series of coincidences thatstrongly suggest a major, ecosystem-altering event took place relatively recently, geologically speaking, he said....

Gap Widening Between Genetic And Behavioral Research

... that health problems viewed ashaving a biological origin require biological interventions and those viewed ashaving a psychological origin require psychological interventions, according toGregory A. Miller, PhD, of the University of Illino...

Large Gene Study Questions Cambrian Explosion

...eam used more than twice as many genes to date the origin of thethree major animal phyla as had been used in... because they yielded a wide range of dates forthe origin of animal species, although all the gene studies agreed that theevent occurred well before the Cambr...

Butterflies Help Reveal The Source Of Life's Little Luxuries

...hers -- arise through thecourse of evolution. "The origin of new morphological characters is a long-standing problem inevolutionary biology," write molecular biologists David N. Keys, David L. Lewisand Sean B. Carroll in a paper that may help explain how unique bits of bodyarchitecture are added long after ...

Little-Explored African Genetic Diversity May Hold Key To Human Origins, Medical Questions

...ulations. This diversity suggests a recent African origin for modern humansand a raft of potentially fertile...d onlyfrom the father -- that indicated an African origin for modern humans. Somepaleoanthropologists disagree and suggest an alternative model of Homo erectu...

Gold Finds Life, Energy, Controversy In Earth

...in thebook's forward, is that of the nonbiological origin of natural gas and oil,which he first proposed more than 20 years ago. These hydrocarbons, Goldpostulated, come from deep reservoirs and are composed of the material fromwhich the Earth condensed. The idea that hydrocarbons coalesced from organicma...

NIAID-Supported Scientists Discover Origin Of HIV-1

... scientists reported that they have discovered the origin of HIV-1, thevirus responsible for the global AIDS...t humansfrom developing AIDS." Until now, HIV-1's origin had been unclear. Although most scientists suspectedthat the virus descended from a primate species...

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