Tag: "split" at biology news

Nearly unbreakable

...but if the bonds break locally, runaway cracks can split the material in a brittle manner. Now in bone, half (by volume) is a stretchable fibrous protein called collagen and the other half a brittle mineral phase called apatite. By as yet incompletely understood construction strategies, such biomineralized...

Varied diet of early hominid casts doubt on extinction theory, says Colorado U study

...rs ago, the australopithecines are thought to have split into the genus Homo -- which produced modern Homo sapiens -- and the genus Paranthropus, Sponheimer said. Paranthropus stood about four feet tall and probably weighed less than 100 pounds, and its pelvis and leg structure indicate it was bipedal. A...

Decoded sea urchin genome shows surprising relationship to humans

...lows us to see what went on in evolution after the split between the ancestors that gave rise to humans and insects. The sea urchin genome provided plenty of unexpected rewards and was a great choice for sequencing." Comparing the genes of the sea urchin to the human gene list shows which human genes are ...

Insight into evolution of adaptive immunity boosted by sea urchin genome sequencing

...elong to one side of the deuterostome evolutionary split and a few invertebrates (termed protochordates) as well as vertebrates, including humans, belong to the other side of the split. The investigators detected in the sea urchin an extraordinarily large number of genes that encode molecules involved in...

A prickly subject: The sea urchin genome is sequenced

...lows us to see what went on in evolution after the split between the ancestors that gave rise to humans and insects. The sea urchin genome provided plenty of unexpected rewards and was a great choice for sequencing." In the 1990s, sea urchins became a valuable fishery in Maine, but their stocks we...

Decoded sea urchin genome shows surprising relationship to man

...lows us to see what went on in evolution after the split between the ancestors that gave rise to humans and insects. The sea urchin genome provided plenty of unexpected rewards and was a great choice for sequencing." The comparison of the genes of the sea urchin to the human gene list shows which human ge...

Learning how nature splits water

...ve bacteria developed a way to harness sunlight to split water molecules into protons, electrons and oxygen...clean energy technologies that rely on sunlight to split water and form hydrogen to feed fuel cells or other non-polluting power sources. Specifically, an ...

Sweet yet sophisticated: Honey bee genome lends insight into sociality, sensation and sex

...fast track to evolutionary complexity Since its split from the bumble bee 60 million years ago, the honey bee has evolved the highest rate of recombination--the process by which genetic material is physically mixed during sexual reproduction--of any known animal. In their Genome Research article, Dr....

American research finds twins more likely to have premature menopause

...ies could arise if early post-implantation embryos split unequally during the critical period when progenitor germ cells are forming. Then a subnormal number of follicles might form in one twin. Second, there could be competition in the uterus and the stress might encourage abnormalities in the ways the g...

Discovery about evolution of fungi has implications for humans, says U of M researcher

...lin said. In 1998 scientists discovered that fungi split from animals about 1.538 billion years ago, whereas plants split from animals about 1.547 billion years ago. This means fungi split from animals 9 million years afte...

Earliest fungi may have found multiple solutions to propagation on land, new study infers

...t the lineage that included both fungi and animals split off from other eukaryotes about 1 billion years ag...relatives, and that they diverged after an earlier split that led to land plants," he said. "What this study is trying to address is what the first fungi loo...

Everybody dance: The energy you use won't shorten your life

...discovered that during metabolism, oxygen (O2) can split into single oxygen atoms, known as free radicals. These rogue oxygen atoms can remain on their own or combine with hydrogen atoms to form reactive oxygen species (ROS), which wreak havoc with enzymes and proteins and adversely affect cell function. T...

Gene offers new lead in cleft lip and palate research

...he process, Alkuraya and colleagues found that the split gene in the patient's DNA sample encoded SUMO1, a small protein that is known to attach to the back of newly formed proteins to modify their function. "This was intriguing news because SUMO1 often attaches to, or tags, proteins to undergo a biochemi...

'Killer' B cells demonstrate evolutionary link between fish and mammal immune systems

...n years ago, the earliest ancestors of modern fish split off of the evolutionary pathway that became the earliest ancestors of modern mammals. In modern mammals, the B cell is a highly adapted part of the immune system chiefly responsible for, among other things, the creation of antibodies that tag foreig...

Mechanism to organize nervous system conserved in evolution

...been borrowed from other pattern systems after the split between vertebrate and invertebrate lineages. As larger organisms evolved, the gradient of a single protein may not have been able to provide sufficient information to subdivide the embryo from top to bottom."...

Frank Uhlmann of London Research Institute wins 'EMBO Gold'

...lls mitosis, the process whereby cells divide and split their duplicated genomes between two daughter cells. He found that a protein, now called "separase", cuts cohesive links between the duplicated chromosomes, triggering their movement towards the daughter cells. Unravelling mechanisms like these is...

Genetic surprise confirms neglected 70-year-old evolutionary hypothesis

...ly unpopular theory about how a single species can split in two turns out to be accurate after all, and act...m one location to another might cause a species to split into two different species," says John Paul Masly, lead author of the paper and doctoral student at ...

Social imitation in neonatal monkeys

...udying neonatal imitation in rhesus monkeys, which split from the human lineage about 25 million years ago. They found that rhesus infants can indeed imitate a subset of human facial gestures--gestures the monkeys use to communicate. The first investigation of neonatal imitation outside the great ape linea...

Researchers sequence the basal eukaryote Tetrahymena thermophila

...id acquisition most likely occurred after they had split from the ciliates. As a basal eukaryote, this genome will enable studies on eukaryotic evolution. The authors aim to next sequence the micronuclear genome....

Scientists uncover critical step in DNA mutation

... formally, it requires that a water molecule (H2O) split apart into a proton (H+) and a hydroxyl anion (OH-). This large energy requirement has puzzled scientists for a long time. Now the research team, led by Landman and Gary Schuster, provost-designate of Georgia Tech, professor of Chemistry and dean of...

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(Date:7/27/2014)... Using data from over 18,000 patients, scientists have ... involved in Parkinson,s disease, including six that had ... Nature Genetics , was partially funded by ... by scientists working in NIH laboratories. , "Unraveling ... understanding the multiple mechanisms involved in this complex ...
(Date:7/25/2014)... summer and some of the smoke from those fires is ... by the Moderate Resolution Imaging Spectroradiometer (MODIS) aboard the Aqua ... descended over the Great Lakes region of the United States. ... July 23, 2014 (first image feature highlighted below) clearly shows ... In the image, it is over Manitoba and ...
(Date:7/25/2014)... associate professor of biomedical engineering at the University ... tissue engineering and artificial organ development., "Introduction to ... guide to entering into the field of artificial ... of biomedical engineering at UH, served as a ... while there are other published books on the ...
Breaking Biology News(10 mins):NIH scientists find 6 new genetic risk factors for Parkinson's 2University of Houston researcher publishes textbook on tissue engineering 2
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