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Tag: "size" at biology news

Newly discovered birdlike dinosaur is oldest raptor ever found in South America

...r Buitreraptor (bwee-tree-rap-tor) is about the size of a very large rooster, but with a long head and very long tail. It is the most complete small theropod (carnivorous dinosaur) ever discovered in South America. Buitreraptor is remarkably different than other domaeosaurs, most obviously due to its...

Polymer gel can block toxic leakage problem in gene therapy

... researchers have found that, because of the small size of pores in blood vessel walls and other access points, these adenoviruses cannot reach the majority of tumor cells by being injected into the blood stream but instead must be injected directly into tumors themselves. However, direct intratumoral in...

Nanoparticles, nanoshells, nanotubes: How tiny specks may provide powerful tools against cancer

...to discrete destructive wavelengths by varying the size of the core and the shell. A nanoparticle combin...destroy tumor cells. Furthermore, because of their size − a few nanometers, or billionths of a meter, in diameter − these nanoshells interact wi...

Bigger brain size matters for intellectual ability

Brain size matters for intellectual ability and bigger is bet...patial intelligence was also correlated with brain size in women, but less strongly. In men, spatial ability was not related to overall brain size. These re...

Underlying cause of massive pinyon pine die-off revealed

...n the 100-by-150 meter plot (about three times the size of a football field). Temperature and precipitation data were recorded at a nearby site. In 1992, the team began tracking tree mortality. "I could see the plot from my office window," said Breshears, who used to work at LANL. When the recent drought...

Rutgers researchers scientifically link dancing ability to mate quality

...figures were gender-neutral, faceless and the same size ?all to keep evaluators from boosting or dropping dancers' scores based on considerations other than dance moves. The researchers also evaluated each dancer for body symmetry, an accepted indicator in most animal species ?including humans ?of how we...

Membrane research opens window to benefits for plants, humans

... allows water to go through; when closed, its pore size is reduced by 2 angstroms, effectively closing the channel, the Swedish researchers reported. The work taken together, Tajkhorshid said, is a landmark study in membrane channels. It addresses the mechanism of gating and regulation of plasma membrane...

Grid bridges 4,800 miles for molecular repositories

...vior at atom-level resolution are huge, ranging in size from gigabytes to terabytes. The extreme file sizes mean simulation data generally resides in the home laboratory where the research was conducted and, for practical purposes, remains inaccessible to other research groups. Yet sharing simulation dat...

Older female fish prefer imperfect male mates, study finds

... male ?if you're a swordtail fish, that is. As the size and age of female swordtail fish increase, so does the preference for males with asymmetrical markings, according to a new Ohio University study. Molly Morris, associate professor of biological sciences, and colleagues found that older female swordt...

Researchers show how air pollution can cause heart disease

...g less than 2.5 microns, referred to as PM2.5, the size linked most strongly with cardiovascular disease. The emissions arise primarily from power plants and vehicle exhaust. The US Environmental Protection Agency (EPA) has regulated PM2.5 since 1997, limiting each person's average exposure per year to no...

Cells from amniotic fluid used to tissue-engineer a new trachea

... for humans (lambs grow quickly and are similar in size to human babies), Fauza's team obtained a small quantity of amniotic fluid and isolated mesenchymal stem cells. Mesenchymal stem cells descend directly from embryonic stem cells and are abundant in the amniotic fluid. They specialize in making connec...

Marathon of nano-sprinters

...n. This is a direct consequence of their nanoscale size which makes them rather susceptible to thermal noise. Thus, a single molecular motor can only 'grab' onto the filament for a relatively short time, on the order of one second. During this time, a single motor covers about one micrometer, which repres...

New brain scan technology could save babies' lives

...h EPSRC funding, the team are aiming to reduce the size of the scanner and improve its speed of operation....ed, evidence of brain damage etc. MONSTIR is the size of a fridge-freezer and takes around 8 minutes to generate an image. The aim is to produce a version...

Cord blood cells may widen treatment window for stroke

...ed the brain's inflammatory response, reducing the size of the stroke and resulting in greatly improved recovery. The rats' inflammatory response to injury from stroke peaked 48 hours after the brain attack, which was when intravenous delivery of the cells appeared most beneficial. "We were very surprise...

Discovering the first steps in transcription-coupled repair

...rong preference for binding to bubbles of just the size typical of transcription -- that is, the size of the bubble opened by RNAPII. Identification of this bubble, which does not progress when RNAPII i...

Sahara's edge studied from ground, air and space to improve water management

...s on the ground gathered information including the size and position of fields, local topography, the soil surface characteristics and vegetation type, distribution and parameters such as leaf area index and wet and dry biomass. Measurements had to be as authoritative as possible, for example close-up thr...

Fossil find: 'Godzilla' crocodile had head of a dinosaur, fins like a fish

...hat made it unusual. Two other features ?its hefty size and T. rex-like snout ?have earned it a unique pla...neage. “This is the most remarkable change in the size and shape of the teeth and snout in the history of marine crocs,?Pol said. The three fossil specime...

New methods offer insight into regulatory DNA

...gene activity and sequence variation. "Our sample size of 60 individuals is relatively small," continued Dr Dermitzakis, "and we might expect not to detect rare variations. However, our pilot project gives us greater confidence to take on a genome-wide survey of gene activity." A global map of sequence ...

New U. of Colorado at Boulder flu chip may help combat future epidemics, pandemics

...nsized to fit into a hand-held portable device the size of a cell phone or PDA and taken into remote areas around the world to test for lethal strains of flu. "We can make it small and simple enough to take into rural areas in places like the Congo, Cambodia or Indonesia that may lack lab facilities," ...

Technique offers new view of dynamic biological landscape

...ishes, they could measure the mutant cells' colony size in an automated fashion and use that to calculate their growth rates. To determine epistatic effects, they compared the growth rate for each cell containing mutations in two genes with the growth rate of mutant cells carrying mutations in only one of...

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