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How some leaves got fat: It’s the veins

By Guest PostMay 10, 2013Nature2d veins, 3d arrangements, brown university, cross section, dry climate plant, efficient photosynthesis, erika edwards, evolution, evolutionary history, hydraulic path lengths, hydraulics for photosynthesis, leaf vein structure, leaf veins, matt ogburn, molluginaceae, monica arakaki, national science foundation, plump leaves, portulacineae, some plants, succulents, third dimension, venation

Some plants, such as succulents, have managed to grow very plump leaves. For that to happen, according to a new study in Current Biology, plants had to evolve 3-D arrangements of their leaf veins in order to maintain adequately efficient hydraulics for photosynthesis.

PROVIDENCE, R.I. [Brown University] — A garden variety leaf is a broad, flat structure, but if the garden happens to be somewhere arid, it probably includes succulent plants with plump leaves full of precious water. Fat leaves did not emerge in the plant world easily. A new Brown University study published in Current Biology reports that to sustain efficient photosynthesis, they required a fundamental remodeling of leaf vein structure: the addition of a third dimension. (more…)

UCLA Researchers Develop New Technique to Scale up Production of Graphene Micro-Supercapacitors

By Guest PostFebruary 24, 2013Sciencebatteries, capacitors, cmos, complementary, consumer grade, dvd burner, electrodes, electronic circuits, electronic devices, energy storage units, grapheme based supercapacitors, graphene micro supercapacitors, graphite oxide, graphite oxide dispersion, graphitic carbon, groundbreaking technique, identification tags, integrated fabrication processes, layer, lightscribe dvd burner, lightscribe optical drive, maher el kady, mems, metal oxide semiconductors, micro electromechanical systems, micro scale, micro supercapacitors, miniaturization, one atom thick, plastic, radio frequency, richard kaner, single atom, third dimension, water

While the demand for ever-smaller electronic devices has spurred the miniaturization of a variety of technologies, one area has lagged behind in this downsizing revolution: energy-storage units, such as batteries and capacitors.

Now, Richard Kaner, a member of the California NanoSystems Institute at UCLA and a professor of chemistry and biochemistry, and Maher El-Kady, a graduate student in Kaner’s laboratory, may have changed the game. (more…)

Researchers Improving Gps Accuracy in The 3rd Dimension

By Guest PostAugust 23, 2011Sciencegps accuracy, gps errors, gps measurements, gps receiver, gps satellites, gps signal, third dimension, vertical accuracy

COLUMBUS, Ohio – Researchers who are working to fix global positioning system (GPS) errors have devised software to take a more accurate measurement of altitude – particularly in mountainous areas. (more…)

Brain’s Map of Space Falls Flat When It Comes to Altitude

By Guest PostAugust 8, 2011Scienceanimal brain, brain, brain map of space, complex environments, grid cells, hippocampus, hotspots, kate jeffery, map of space, nature neuroscience, neurons, place cells, Space, third dimension, ucl psychology and language sciences, wellcome trust

Animal’s brains are only roughly aware of how high-up they are in space, meaning that in terms of altitude the brain’s ‘map’ of space is surprisingly flat, according to new research.

In a study published online in Nature Neuroscience, scientists studied cells in or near a part of the brain called the hippocampus, which forms the brain’s map of space, to see whether they were activated when rats climbed upwards. (more…)

Tag Archives: third dimension

How some leaves got fat: It’s the veins

UCLA Researchers Develop New Technique to Scale up Production of Graphene Micro-Supercapacitors

Researchers Improving Gps Accuracy in The 3rd Dimension

Brain’s Map of Space Falls Flat When It Comes to Altitude