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Curve in Biological News

New theory gives more precise estimates of large-scale biodiversity

... species at large scales come from a hypothetical curve based on fractals, which predicts that the number ... of the species-area relationship showed that the curve has to be tweaked for every class of organisms ... the same," he said. "There really is a universal curve people are sampling, they are just sampling along ...

Paleozoic 'sediment curve' provides new tool for tracking sea-floor sediment movements

... say. One such tool is a new sediment curve (which shows where sediment-on-the-move is ... issue of the journal Science . The sediment curve covers the entire Paleozoic Era. "The new Paleozoic sea-level sediment curve provides a way of deriving predictive models of ...

Ancient marine invertebrate diversity less explosive than thought

... (July 4) issue of Science, a new diversity curve that shows that most of the early spread of ... million years that elapsed. One key to the new curve is the Paleobiology Database, ( ... "Over 30 years ago, researchers looked at the curve they had and considered that perhaps diversity ...

Species have come and gone at different rates than previously believed

... in the July 4 issue of Science, a new diversity curve that shows that most of the early spread of ... at Santa Barbara. One key to the new curve is the Paleobiology Database, ... "Over 30 years ago, researchers looked at the curve they had and considered that perhaps diversity ...

After dinosaurs, mammals rise but their genomes get smaller

... LTRs, young and old, Lynch and his colleagues usually saw a descending curve with lots of new transposable elements and a dramatic drop-off in the ... drop-offs both in the number of older and younger LTRs. The shape of the curve is consistent with previously published data for other types of so-called ...

Moderate quantities of dirt make more rain

... increases; it reaches a peak and then falls considerably. Before the curve peaks, more aerosols provide more precipitation; after the peak, additional aerosols reduce the precipitation. The curve reaches maximum concentration at 1,200 condensation nuclei per cubic ...

NIST chemists get scoop on crude 'oil' from pig manure

... data on the makeup and performance of complex fluids. A distillation curve charts the percentage of the total mixture that evaporates as a sample is ... a complex mixture typically have different boiling points, a distillation curve gives a good measure of the relative amount of each component in the ...

Carnegie Mellon develops computer model to study cell membrane dynamics

... mechanism that enables vesiculation the process by which cell membranes curve around proteins or other cellular cargo to form vesicles. Without this generic ability to curve its protein-studded membranes and bud off cargo shuttles, a cell couldnt ...

Study reveals predation-evolution link

... holes and repair scars are strikingly parallel to Sepkoskis diversity curve for marine invertebrates. This diversity curve, compiled by the late Jack ... oceanic environments. Also, understanding the true nature of Sepkoskis curve will help us interpret our findings. Is it biological" Is it the product ...

New species of phallus-shaped mushroom named after California Academy of Sciences scientist

... this particular species is notable for its small size, white net-like stem, and brown spore-covered head. It is also the only Phallus species to curve downward instead of upward. "The mushroom emerges from an egg and elongates over four hours," says Desjardin, who is also a Fellow of the ...

Study says 'middle class' coral reef fish feel the economic squeeze

... boats that enable fishermen to fish on the open seaand an increased awareness on the importance of coral reefs on ecological health. The U-shaped curve in fish biomass with respect to socioeconomic levels approximates what is known as an environmental "Kuznet curve," which is adapted from a graphical ...

Root system architecture arises from coupling cell shape to auxin transport

... of the root system of the model organism Arabidopsis thaliana, a plant with the unusual common name "mouse-ear cress." The authors show that the curve of the root is key in provoking new growth. They used computational modeling of the transport of a well-known plant hormone, auxin, and by following ...

Root system architecture arises from coupling cell shape to auxin transport

... of the root system of the model organism Arabidopsis thaliana, a plant with the unusual common name "mouse-ear cress." The authors show that the curve of the root is key in provoking new growth. They used computational modeling of the transport of a well-known plant hormone, auxin, and by following ...

December 2008 Geology and GSA Today media highlights

... and many other major orogenic gold deposits hosted in sedimentary rocks of various ages, show a pattern generally parallel to the seawater sulfate curve through geologic time, indicating that the sulfur in most sediment-hosted orogenic gold deposits was probably also originally from the reduction of ...

'Fish technology' draws renewable energy from slow water currents

... have long known how to put the vortices that cause these vibrations to good use. "VIVACE copies aspects of fish technology," Bernitsas said. "Fish curve their bodies to glide between the vortices shed by the bodies of the fish in front of them. Their muscle power alone could not propel them through ...

PNNL leadership in carbon sequestration featured at international conference

... Pipeline Networks," by Jim Dooley, JGCRI, 2:30 p.m. This session, titled "CCS at Scale," is co-chaired by PNNL's Edmonds. "A Preliminary Cost curve Assessment of Carbon Dioxide Capture and Storage Potential in China," by Robert Dahowski, 2:30 p.m. Tuesday, Nov. 18 "The Impact of ...

Nanotech and synbio: Americans don't know what's coming

... is about to take hold in the nation's capital. Public policy experts are concerned, regardless of party, that the federal government is behind the curve in engaging citizens on the potential benefits and risks posed by technologies that could have a significant impact on society. "Early in the ...

Biological selenium removal: The solution to pollution?

... toxin" due to the fact that it shows only a marginal line between the nutritious requirement and toxic effects upon exposure. The steep dose response curve due to bioaccumulation effects have lead to the characterization of selenium as a "time bomb" that can be fused by exceeding a narrow threshold ...

UCSB researcher leads worldwide study on marine fossil diversity

... Marine Invertebrates." A team that included 34 other researchers, who began their work in 1998, coauthored the report. Alroy's report shows a new curve in the diversity of ancient marine invertebrate species such as clams, sand dollars and lobsters, while also revealing that most of the early ...

Moores UCSD Cancer Center study links vitamin D, type 1 diabetes

... to +70 for the northern hemisphere. They then plotted incidence rates for 51 regions according to latitude. The resulting chart was a parabolic curve that looks like a smile. In the paper the researchers call for public health action to address widespread vitamin D inadequacy in U.S. children. ...

Researcher provides tool to enable determination of age of anchovies with greater precision

... or other research. Thus, not only the distribution of survivors over a specific year is obtained, but also - and for the first time ever a growth curve for the first months of life of the European anchovy. ...

New decontamination system kills anthrax rapidly without lingering effects

... region of the spectrum wavelengths below 280 nanometers the emission spectra of each phosphor was measured against the DNA absorption curve. This curve shows the optimal wavelengths to destroy an organisms DNA. After investigating many different phosphors, the researchers chose lanthanum ...

Vega main engine test in Kourou

... on a motor of this size, which usually needs to employ a more complex hydraulic system. The first data received show that the pressure curve is following perfectly the prediction. It is an outstanding result, said Caroline Cros, the ESA team member responsible for P80 development and I ...

Toll of climate change on world food supply could be worse than thought

... and as a consequence, the potential for bigger, more rapid problems remains largely unexplored. The projections show a smooth curve, but a smooth curve has never happened in human history, said Tubiello. Things happen suddenly, and then you cant respond to them. For instance, extreme-weather events ...

Bats use touch receptors on wings to fly, catch prey, study finds

... by alerting them when their wing position or curve is incorrect, preventing the creatures from ... "It's like a sail or a plane. When you change the curve of a wing a little bit, you get improved lift. But if you curve it too much, the bat ?or plane ?may suddenly lose ...

Sandia researchers take new approach to studying how cells respond to pathogens

... miniaturized platform using our unique microfluidic and imaging tools," Singh says. Hyperspectral fluorescence imaging with multivariate curve resolution (MCR) is used to image the tagged proteins and provide quantitative measurements on multiple proteins simultaneously. The goal is to ...

Stretching DNA to the limit

... of the DNA strands. Upon exposure to UV light, the force profile of the viral DNA changes dramatically in a dose-dependent manner. The force curve of intact DNA is characterized by a plateau region. This characteristic plateau is drastically reduced in width with increasing exposure to UV light. ...

Magnetic system could be key to surgery without scars

... of trocars (holes) necessary for laparoscopic surgery has the potential to revolutionize surgical practice,?but noted that there will be a learning curve for the new system and that because of the expanded maneuverability, surgeons will likely need to develop new techniques. Also, until the system ...

Scientists crack rhino horn riddle

... dagger handles or good luck charms. But new research at Ohio University removes some of the mystique by explaining how the horn gets its distinctive curve and sharply pointed tip. Scientists have discovered new details about the structural materials that form the horn and the role those materials play ...

Tyrannosaur survivorship -- tough times for teens

... animals simply had low mortality, just like older juveniles and subadults of most large terrestrial mammals today." The estimated survivorship curve also provides a possible explanation for the rarity of individual giants--just two per cent of the population lived long enough to attain maximal ...

Ancient global warming drove early primates' dispersal

... precision the times of first appearance of Teilhardina in Asia, Europe, and North America. To achieve such precision, they used a carbon isotope curve recently documented on all three continents. Carbon in the atmosphere, earth and living organisms differs in the proportion of carbon-12 and ...

Researchers unravel DNA tangles and enzyme seamstresses

... DNA loops tend to touch in an easily recognizable hook-like way, fitting together perfectly; whereas strands of unlinked DNA molecules tend to curve away when they touch each other. The findings could have implications in designing new drugs to treat cancer and infectious diseases as uncontrolled ...

The making and breaking of microtubules

... tackled the depolymerization process, watching what happens to microtubules when GDP is bound to tubulin. During this process tubulin protofilaments curve back sharply from the end of the microtubule, forming "peels," like a wood shaving curling up from a plane. Wang found conditions for which the curls ...
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