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Tag: "origins" at biology news

Prenatal Stress Keeps Infants, Toddlers up at Night, Study Says

...hilds sleep is vital to his or her growth, but the origins of problems affecting it remained unclear. Now, we have evidence that these patterns may be set early on, perhaps even before birth, said lead author Thomas OConnor, Ph.D., associate professor of Psychiatry at the University of Rochester Medical Cent...

One species, many genomes

...e. Arabidopsis plants from different geographical origins differ in many traits (the background shows schematically sequence variation in the DNA of these plants). To track down the variation in the genome of the different Arabidopsis strains, the researchers compared the genetic material of 19 wild strai...

Endosome-mediated signaling in plants

...gs will influence our thinking of the evolutionary origins of endosomes and hopefully help us to understand why cells use them as signaling compartments," noted lead author of the paper, Dr. Niko Geldner. Endosomes were once thought to function solely in the inactivation of receptors and the down-regulati...

Surprising origin of cell's internal highways

...cell imaging techniques that could reveal the true origins of these structures. "The Golgi apparatus is very close to the centrosome," said Kaverina. "So if you're not looking at it precisely, it is hard to distinguish between the centrosome and Golgi." To get a close look, Kaverina and colleagues ta...

Egyptians, not Greeks were true fathers of medicine

...ack 3,500 years say they have found proof that the origins of modern medicine lie in ancient Egypt and not with Hippocrates and the Greeks. The research team from the KNH Centre for Biomedical Egyptology at The University of Manchester discovered the evidence in medical papyri written in 1,500BC ?1,000 year...

Researchers publish first marsupial genome sequence

...chers with a fresh perspective on the evolutionary origins of the human genome. It sheds light on the genetic differences between placental mammals, such as humans, mice and dogs, and marsupial mammals, such as opossums and kangaroos. "Marsupials are the closest living relatives of placental mammals. Bec...

Study warns deep-sea mining may pose serious threat to fragile marine ecosystems

...ies, which some biologists argue may represent the origins of life on earth. "We need to act now to establish scientific and legal methods to protect these sensitive ecosystems and minimize the potential environmental impact of this industry," says lead author Jochen Halfar, an assistant professor of ear...

Genetic fingerprints identify brain tumors' origins

... form." Researchers use information about tumor origins to develop new tests and treatments for the tumors...fingerprints can be used to identify the potential origins of brain tumors. "There's been a movement in recent years to link normal brain development to ped...

Researchers discover gene crucial for nerve cell insulation

... discovery will provide important insight into the origins of disorders affecting myelin production." The study appears in the online version of Molecular and Cellular Biology. John Svaren, Ph.D., an associate professor in the Department of Comparative Bioscience at the University of Wisconsin–Madison...

UBC researchers reveal dwarf aquatic plants' hidden ancestry

...des a major piece in the puzzle of flowering-plant origins ?something Charles Darwin once termed an ‘abominable mystery??by revealing that some of the earliest evolutionary branches were more diverse then we once thought." ...

What's in the water? Estrogenic activity documented in fish caught in Pittsburgh's rivers

...r and the aquatic food chain, and to determine the origins of these chemical contaminants," said Dr. Volz. The study examined white bass and channel catfish caught in the Allegheny, Monongahela and Ohio Rivers. These fish are among those commonly caught as a food source by local anglers. The experiments ...

Paleontologists discover new mammal from Mesozoic Era

...tion of the ear is important for understanding the origins of key mammalian adaptations." Mammals have hig... more than a century for clues to the evolutionary origins of mammal ear structure. Mammalian hearing adaptation is made possible by a sophisticated middle ...

Exploring the molecular origin of blood clot flexibility

...atomic force microscope," notes Brown. Once the origins of the mechanical properties of clots are well understood, it may be possible to modulate those properties, note the study authors. "If we can change a certain parameter perhaps we can make a clot that's more or less stiff," explains Weisel. For exam...

RNA enzyme structure offers a glimpse into the origins of life

...s process poses a challenge for theories about the origins of life. "Which came first, nucleic acids or proteins? This question once seemed an intractable paradox, but with the discovery of ribozymes, it is now possible to imagine a prebiotic 'RNA World' in which self-replicating ribozymes accomplished bo...

Gene study shows three distinct groups of chimpanzees

...epers or primatologists could use to determine the origins of a chimpanzee with uncertain heritage. "Finding such a marked difference between the three groups has important implications for conservation," said Molly Przeworski, PhD, assistant professor of human genetics at the University of Chicago and a ...

Deep in the ocean, a clam that acts like a plant

...of the deep sea have implications for studying the origins of life, Eisen said. Life on Earth may have got its start with microbes living on such chemical reactions, before the evolution of photosynthesis. "And they’re just plain interesting," Eisen added. If you were thinking that giant clams sound ta...

Honeydew honeys are better antioxidants than nectar honeys

A study of 36 Spanish honeys from different floral origins revealed that honeys generated by bees feeding on honeydew have greater antioxidant properties than those produced by bees feeding on nectar. The study is published in this month’s edition of the Journal of the Science of Food and Agriculture. Natur...

Morphine makes lasting -- and surprising -- change in the brain

... Brown scientist Julie Kauer, may help explain the origins of addiction in the brain. The research also supports a provocative new theory of addiction as a disease of learning and memory. "We’ve added a new piece to the puzzle of how addictive drugs affect the brain," Kauer said. "We’ve shown here that mo...

Selecting life: Scientists find new way to search for origin of life

...sed by early life. One of the biggest questions in origins research, therefore, is how just the right blend of critical biomolecules was selected, concentrated, and organized from the diverse primordial "soup." Previous research by the Carnegie team and others has shown that many molecules, including amino a...

American scientist's research of life's first cells

...arkable effort at forward engineering the possible origins of cellular behavior," said Dr. Donald Kennedy, ed...romises to lead to more exciting insights into the origins of biological complexity," she writes. Chen is currently completing medical school at Harvard and pl...

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