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Tag: "back" at biology news

Good times ahead for dinosaur hunters, according to U of Penn scientist's dinosaur census

...cks are of the right age to contain fossils dating back to the dinosaur era. At some point, paleontologists will find all the fossils that could possibly be found. Dodson and Wang's analysis also offers evidence that dinosaur populations were stable before the extinction event that ended their reign of ...

Peering into the shadow world of RNA

... to copy themselves into RNA, translate themselves back into DNA, and then reinsert themselves back into the DNA at the new location. If their insertion spot happens to be within the coding region for...

A valuable fly for research into disease

...he role of the fly Studies using Drosophila date back to the last century and have provided valuable insight into the fundamental principles of biology and genetics. Only in recent years, however, and thanks in large part to the discovery of the high degree of homology between the genetic make-up of fli...

New bird discovered on unexplored Columbian mountain

...ffers from its closest relatives in having a black back and no white markings on its wings. It also is found in other nearby mountains in Colombia's eastern Andean range. Genetic, morphological and vocal studies have confirmed its identity as a new taxon. "Before we began this study, no one knew what s...

Researchers link ocean organisms with increased cloud cover and potential climate change

...the atmosphere cloudier and reflects more sunlight back into space." In their paper, the researchers estimated that the isoprene emissions reduced energy absorption in the area by about 15 watts per square meter. "This is a huge signal," said Nenes. "You would normally expect to see a change of a cou...

Common ancestry of bacterium and plants could be key to an effective new treatment for chlamydia

...he biochemist who characterized the lysine pathway back in the 1950s, and so he had intimate knowledge about the steps of the pathway," said Leustek. "And he's the one that alerted us to the fact that plants do it differently. This is still the case, with the exception of the Chlamydia bacterium." ...

Brown scientists map structure of DNA-doctoring protein complex

... insert its own genes, and then sew the chromosome back up. That work was conducted using the lambda virus, which infects Escherichia coli (E. coli) bacteria and serves as a model that scientists use to understand mobile DNA. Now scientists in the Landy lab have solved the structure of a DNA-protein co...

Train your brain to hear your friends at a party

... processing that information, and sending messages back to the eye to help it cope with different situatio...eived and we think it is actively sending messages back to the ear telling it how to cope with the new hearing loss, perhaps by stimulating or increasing th...

Newly identified biomarker detects and regulates spread of brain tumors

...he marker may play when the tumor spreads or comes back after treatment. The study, ÒAttractin is elevated in the cerebrospinal fluid of patients with malignant astrocytoma and mediates glioma cell migration," is published in the November issue of Clinical Cancer Research. The biomarker, a protein kno...

Genetic surprise confirms neglected 70-year-old evolutionary hypothesis

...in humans and other mammals. Masly's work shows a back door through which speciation can start. If the right genes jump around in the genome, a population can begin creating individuals that can't successfully mate with the general population. If other speciation pressures, like geographic isolation, are...

'Erectile dysfunction' drugs heighten natural anti-cancer activity

...y use nitric oxide to help bring the immune system back down to surveillance levels after an "attack mode" response to foreign material. The impotence drugs seem to reverse this process, stopping the production of nitric oxide by MDSCs thereby allowing other immune cells to "see" the cancer and attack...

Malaria treatment efficacy compromised in certain HIV-positive patients

...one of the greatest threats to our ability to roll back malaria," according to Dr. Van geertruyden. The study suggests that malaria control and prevention, next to early diagnosis and a highly efficacious malaria treatment, are essential tools in areas where both diseases coexist. Furthermore, the inter...

Mayo researchers discover HIV dependence on a human protein

...HIV's main target, became resistant to HIV. Adding back p75 made them vulnerable again. And adding a "dominant-negative" piece of p75 to the mix, a sort of molecular spanner in the works, further impaired the virus (over 500-fold). Moreover, the Mayo team showed that each "knot" of the molecular tether w...

Fast test for low blood flow in dogs detects early heart trouble

...ach of the organ's three major regions: the front, back and side walls. When researchers compared the deconvolution measurements with those derived from the microspheres test, they found the two to be almost identical, with statistical R-values of 0.93 to 0.96, and with 1.0 meaning a perfect match. I...

Two studies on bee evolution reveal surprises

...st bee ever found -- "pushes the bee fossil record back about 35 million years," according to Bryan Danfor...years ago -- but previous bee fossil records dated back only about 65 million years. Danforth and Poinar's fossil provides strong evidence for a more remote...

Rescuing injured hearts by enhancing regeneration

...heart attack, the damaged heart muscle cannot grow back and is instead replaced by scar tissue. Excessive scarring can impair the heart's pumping capacity and can lead to life-threatening arrhythmias. Heart-muscle cells (cardiomyocytes) normally cannot replicate in mammals, a major obstacle to regeneratio...

Plants give up answers in the war on bacteria

..., a chemical called coronatine, to force the pores back open. For bacteria, entry is crucial to causing disease and probably survival. They could die if left lingering on the surface. Animal-based bacteria do not produce coronatine. "Now that we know a key step in bacteria's attack, we have something we...

Teenager moves video icons just by imagination

...s the motions of a movable laser cannon that moves back and forth across the bottom of the video screen. Row upon row of video aliens march back and forth across the screen, slowly coming down from the top to the bottom of the screen. The object...

Finding an answer to Darwin's Dilemma

...he southeastern coast of Newfoundland. This pushed back the age of Earth’s earliest known complex life to more than 575 million years ago, soon after the melting of the massive "snowball" glaciers. New findings reported today shed light on why, after three billion years of mostly single-celled evolution,...

Artificial cornea offers better results for infants, some blind patients

...artnership between Aquavella and Dohlman stretches back nearly half a century. Aquavella was the first doctor in the nation to serve a fellowship focused specifically in cornea surgery, in the early 1960s; he served under Dohlman, a leading figure in corneal science. The two physicians have worked togethe...

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