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Tag: "appearance" at biology news

'Virtual autopsy' helps identify drowning as cause of death

...othy fluid in the airways, obscured "ground-glass" appearance or thickening in the lungs, and swelling, fluid or sediment in the stomach. Images were then compared to autopsy reports and photographs. MDCT indicated that all of the drowning victims had fluid in the paranasal sinuses and ears and ground-glass ...

How to look at dinosaur tracks

...rosion, because the shape, dimensions, and general appearance of the footprint become seriously altered by erosion.? Geologists also must account for whether the step was taken on a sloped surface or on a horizontal surface, and whether it was taken during dry season or wet season. For example, estimating...

New technique will produce a better chromosome map

...t," Novikov said. "This is the starting point: the appearance of the genes themselves." Cell and developmental biology professor and lead investigator Andrew S. Belmont and visiting scientist Igor Kireev, of Moscow State University, are co-authors on the paper. Belmont is in the U. of I. Institute for Genomi...

Scientists identify pancreatic cancer stem cells

...c cancer cells "appeared remarkably similar to the appearance of tumors taken directly from patients," Simeone said. The purported cancer stem cells produced a diverse mixture of cells, some of which are not cancerous, that reflected an actual human pancreatic tumor, she said. The markers that define the hig...

'Marathon mice' elucidate little-known muscle type

...he PGC-1â transgenic mice was strikingly redder in appearance than wild-type controls," indicative of their increased mitochondrial content, the researchers now report. Upon further examination, the researchers were surprised to find that the fibers showed a reduction in I, IIA, and IIB MHCs and as much as a 5-...

Why aren't humans furry? Stone-Age moms could be the answer

...d the resources to nurture her baby. The newborn's appearance probably influenced whether the mother kept or abandoned it. An attractive baby was more likely to be kept and reared. Harris' theory is that this kind of parental selection may have been an important force in evolution. If Stone Age people believ...

Darwin's famous finches and Venter's marine microbes

...lassifying the species they encounter not by their appearance but by their unique genetic code. The current studies analyze samples collected from surface waters during the first phase (or first third) of the voyage, which led the Sorcerer II from Newfoundland through the Panama Canal and Galapagos Island o...

Study to explore using magnets to correct 'sunken chest'

...cence when children are self-conscious about their appearance and seek peer acceptance. "This is not a trivial problem for these kids," Harrison said. "Most are willing to undergo a big, painful and expensive surgery to fix it. Why not a simple little outpatient procedure to fix it?" Researchers are seek...

Researchers find 6,000-year-old fossil evidence

...th shallow central depressions, different from the appearance of starch grains from other foods. This discovery enables researchers to gain a better picture of ancient diets. By analyzing the grains on cooking tools, they were able to determine that people used the same grinding stones to grind corn, chili p...

Gene study shows three distinct groups of chimpanzees

...ble difference between the populations in terms of appearance or behavior." ...

Prehistoric mystery organism verified as giant fungus

...hed themselves on land 40 million years before the appearance of Prototaxites, the tallest among them stood no more than a couple feet high. By the end of the Devonian, approximately 345 million years ago, large trees, ferns, seeds, leaves and roots had all evolved. "They’re all there. They just exploded over t...

Ladybugs may be cute, but watch out when they get near wine

...erroneous preconceived expectations of early human appearance that violated principles of craniofacial development," said Dr. Bromage, whose reconstruction, by contrast, shows a sharply protruding jaw and a brain less than half the size of a modern human"s. These characteristics make the 1.9 million-year-old e...

Man's earliest direct ancestors looked more apelike than previously believed

...erroneous preconceived expectations of early human appearance that violated principles of craniofacial development," said Dr. Bromage, whose reconstruction, by contrast, shows a sharply protruding jaw and a brain less than half the size of a modern human"s. These characteristics make the 1.9 million-year-old e...

Scientists identify specific enzymes that make meningitis hard to fight

... to rearrange its DNA and thus change its external appearance to the body's immune system. Significantly our research has now demonstrated that the ability of meningitis to repair its DNA is important for its ability to survive attack from the body's immune system. This work provides an insight into the precise...

Fish can determine their social rank by observation alone, study finds

...d team took advantage of this reversible change in appearance by staging a series of short fights between male c...d recovered from earlier losses, so their physical appearance was similar, right down to the eyebar. From the point of view of the bystander, therefore, each riva...

Turning a cellular sentinel into a cancer killer

... noted that Evan and his colleagues had seen rapid appearance of tumors that progressed despite p53 expression, indicating that cancers can mutate to deactivate the pathway or circumvent it. Both Lowe and Jacks said they agreed that therapies aimed at reactivating p53 would still have to cope with the adaptab...

How fish conquered the ocean

...st species took place as evidenced by their sudden appearance in the fossil records of marine sediments. The bas...uring eggs. The timing of these events matches the appearance of the vast numbers of marine acanthomorph teleosts in the fossil record. The authors propose that t...

German researchers develop first non-invasive test to measure skin aging

...ollagen and elastin, whose degeneration causes the appearance of wrinkles and the progressive loss of skin smoot...e proteins' fibrous matrices, showing the physical appearance of the dermis, the white lower-layer of skin that gets exposed in deep abrasions. Large variation...

Uncovering DNA's 'sweet' secret

... stable than DNA. However, it has a more haphazard appearance than normal DNA, looking more like a "slowly writhing ribbon" than the tightly twisted ladder of DNA. "The reason that DNA was 'picked' is not because it's thermodynamically extremely stable," Egli said. "There are others - including homo-DNA - tha...

Heart smart: new drug improves blood flow

... have previously shown that oxidative stress - the appearance of free radicals in the walls of arteries - is a key mechanism underlying cardiovascular disease. "Free radicals contribute to the formation of arterial blockages. What's more, as the number of free radicals increases, they also interfere with the ...

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