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Tag: "origin" at biology news

A sweet solution for Alzheimer's disease?

...tient with his own protein, which was probably the origin of the allergic reaction to the vaccine," the researcher said. Another complication with previous attempts to treat Alzheimer's disease has been that some compounds--such as beta secretase inhibitors--cannot enter the brain easily, St George-Hyslop...

Methane-belching bugs inspire a new theory of the origin of life on Earth

...he inspiration for a fundamental new theory of the origin of life on Earth, reconciling a long-contentious p...erotrophic" and "chemoautotrophic" theories of the origin of life both focus on the processes by which chemical building blocks first appeared for primitive l...

The Midas Bug -- the bacterial alchemy of gold

...gold grains precipitate gold from solution. "The origin of secondary gold grains is a controversial topic that is widely debated within the scientific community," Dr Reith said. "There are those who believe the grains are purely detrital, while others believe they form by chemical accretion. "A third...

Record air pollution above the Arctic

... scientists expect the detailed examination of the origin and chemical composition of the aerosols to yield further understanding for the current observations. ...

Scientists' cell discovery unearths evolutionary clues

...or Baldauf and her team will be to investigate the origin of these amoebas, and also to search for new species and to establish their position on the family tree. Meanwhile, a number of research projects, including teams in the USA and Germany, have won sponsorship to sequence the genomes of social amoeba s...

Sunflower speciation highlights roles for transposable elements in evolution

... of chromosomes, like most animals and plants--the origin of new species through inter-species hybridization... findings not only add an interesting twist to the origin of new sunflower species through hybridization, but also suggest that the sunflower system may emerg...

History-hunting geneticists can still follow familiar trail

...udy of mtDNA has helped to demonstrate the African origin of our species and the relationship between living humans and the Neanderthals," said Connie Mulligan, an associate professor of anthropology in the College of Liberal Arts and Sciences and an assistant director of the UF Genetics Institute. "MtDNA d...

A new male-specific gene in algae unveils an origin of male and female

...duced by members of each sex. But the evolutionary origin of oogamy—reproduction though joining of distinct sperm and egg cells—is in fact poorly understood. In particular, it has remained unclear how oogamy arose from isogamy, a more simple form of sex in which very similar reproductive cells take on diffe...

Therapeutic role found for carbon monoxide

... in fact, it is thought to have contributed to the origin of life. Perhaps this was a sign of its necessary role in biology." ...

Leading reason for corneal transplants comes into focus

...reated a woman with a corneal dystrophy of unknown origin that looked remarkably similar to FCD despite slightly different symptoms. "I knew it wasn't classic Fuchs, but rather something new," remembers Gottsch. "In the end, it wasn't Fuchs at all, but a sort of mutated distant cousin of the disease. It mad...

Wild gorillas carriers of a SIV virus close to the AIDS virus

... Africa, were living with HIV. The question of the origin of HIV-1, responsible for the AIDS pandemic, has b...ransmission from chimpanzee to humans, whereas the origin of HIV-1 group O is less apparent. It cannot be excluded that chimpanzees infected by HIV-1 group O ...

Two studies on bee evolution reveal surprises

...t have ever existed -- Charles Darwin called their origin and diversification an "abominable mystery." Mo...ttidae. That would mean that bees have an African origin and are almost as old as flowering plants, which would help explain a lot about the evolutionary div...

Genetic surprise confirms neglected 70-year-old evolutionary hypothesis

...ientists must reassess the process involved in the origin of species. The beginnings of speciation, suggests the paper, can be triggered by genes that change their locations in a genome. "In the 1930s there was speculation that parts of chromosomes that switch from one location to another might cause a spe...

American scientist's research of life's first cells

...ation might have been surprisingly easy during the origin of life." Born in San Diego, California, to Tai...ck Szostak, she investigated the biophysics of the origin of life - work that was recognized by the Harold M. Weintraub Graduate Student Award. "The awar...

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

...cientists understand several probable steps in the origin of life, notably how the first organic molecules c...oldly asking a fundamental question related to the origin of life. We know that organic compounds were present in the early Earth environment, but as dilute s...

Discovery in the evolution of the immune system absorbing cells

...e systems of fish and amphibians work but also the origin and composition of the immune systems of humans and mammals". The work concludes that there is an evolutionary relationship between macrophages and cells by which both cell types derive from a common, ancestral cell with functional properties of both...

Cracking the egg

...or reproductive isolation, a primary cause for the origin of new species, and an astonishing diversity of mammals inhabiting Earth." ...

Uncovering DNA's 'sweet' secret

...." "For a chemist, it makes sense to analyze the origin of these molecules." One particular curiosity: h...the most fundamental of scientific inquiries - the origin of life on Earth. If the pieces of DNA and RNA hadn't come together just so, life as we knowit would...

More species in the tropics because species have been there longer

...pical regions seems to be explained by the ancient origin of many groups in the tropics, more recent colonization of temperate regions, and by the inability of most tropical species to tolerate the variable temperatures of temperate areas. According to John Wiens, the study has important conservation im...

Ape gestures offer clues to the evolution of human communication

...human language began with gestures as the gestural origin hypothesis of language suggests. This study appears in the current issue of the Proceedings of the National Academy of Sciences. Working with two groups of bonobos (13 animals) and two groups of chimpanzees (34 animals), Yerkes researchers Amy Poll...

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