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Bio-inspired Fibres Change Colour When Stretched

By Guest PostFebruary 6, 2013Sciencealfie lethbridge, bastard hogberry, bio inspired fibres, birds, blue colour, bright iridescent, cells, change colour, creation, cylindrical cross section, eye on earth, fruit, geographic area, Germany, harvard laboratories, harvard university, heat, joanna aizenberg, key elements, light and colour, ludwig maximilians university, margaritaria nobilis, mathias kolle, moritz kreysing, nanoscale, new fibre, peter vukusic, photonic fibres, polymer bilayer, pressure, principal investigator, seed, skin, smart fabrics, soap bubbles, south american, specific biological function, technological design, tropical plant, unique structural elements, university of exeter, vibrant colour, when stretched

A team of materials scientists at Harvard University and the University of Exeter has invented a new fibre which changes colour when stretched. Inspired by nature, the researchers identified and replicated the unique structural elements, which create the bright iridescent blue colour of a tropical plant’s fruit.

The multilayered fibre, described in the journal Advanced Materials, could lend itself to the creation of smart fabrics that visibly react to heat or pressure.

“Our new fibre is based on a structure we found in nature, and through clever engineering we’ve taken its capabilities a step further,” says lead author Dr Mathias Kolle, a postdoctoral fellow at the Harvard School of Engineering and Applied Sciences (SEAS). “The plant, of course, cannot change colour. By combining its structure with an elastic material, however, we’ve created an artificial version that passes through a full rainbow of colours as it’s stretched.” (more…)

Salt Seeds Clouds in the Amazon Rainforest

By Guest PostSeptember 13, 2012Environmentabsorption, aerosol particle, airborne particle, als beamline, Amazon, amazon jungle, amazonian, asci, ballistospores, berkeley lab, biomass, brazil, chemistry, christopher pohlker, david kilcoyne, deep, emission, fine particle, fog, forest canopy, fungi fire, gas phase, Germany, graphitic, institute, isoprene, leaves, liquid droplet, manaus, mary gilles, max planck, meinrat andreae, microscopy, moisture, morning, mpic, natural forest, nexafs, organic carbon, organism, osmosis, photon, potassium level, potassium salt, rainforest, sacs, seed, soluble particle, stxm, sugar alcohol, terpenes, tree resin, trees, ulrich pöschl, water vapor, xray

It’s morning, deep in the Amazon jungle. In the still air innumerable leaves glisten with moisture, and fog drifts through the trees. As the sun rises, clouds appear and float across the forest canopy … but where do they come from? Water vapor needs soluble particles to condense on. Airborne particles are the seeds of liquid droplets in fog, mist, and clouds.

To learn how aerosol particles form in the Amazon, Mary Gilles of the Chemical Sciences Division at the U.S. Department of Energy’s Lawrence Berkeley National Laboratory (Berkeley Lab) and David Kilcoyne of the Lab’s Advanced Light Source (ALS) worked with Christopher Pöhlker of Germany’s Max Planck Institute for Chemistry (MPIC) as part of an international team of scientists led by MPIC’s Meinrat Andreae and Ulrich Pöschl. They analyzed samples of naturally formed aerosols collected above the forest floor, deep in the rainforest. (more…)

Seed Size is Controlled by Maternally Produced Small Rnas, Scientists Find

By Guest PostApril 14, 2012Naturearabidopsis, austin, david baulcombe, diploid, double fertilization, duplicate genome, embryo, endosperm, flowering plant, gene, maternal genome, molecular mechanism, placenta, plant, plant embryo, plant evolution, rna molecule, seed, seed production, sirnas, small, small interfering rnas, tetraploid, university of cambridge, university of texas, z jeff chen

AUSTIN, Texas — Seed size is controlled by small RNA molecules inherited from a plant’s mother, a discovery from scientists at The University of Texas at Austin that has implications for agriculture and understanding plant evolution.

“Crop seeds provide nearly 70 to 80 percent of calories and 60 to 70 percent of all proteins consumed by the human population,” said Z. Jeff Chen, the D.J. Sibley Centennial Professor in Plant Molecular Genetics at The University of Texas at Austin. “Seed production is obviously very important for agriculture and plant evolution.” (more…)

Investing in Kids’ Future Pays Off

By Guest PostOctober 27, 2010Culture, Generaland downpayment, business start ups, cda, child development accounts, entrepreneurship, feel, kids, long term savings accounts, mich, parent child interactions, parents, pontiac, saving for education, secure, seed, trina shanks, university of michigan

ANN ARBOR, Mich. — When parents set up long-term savings accounts for college, business start-ups or home ownership, kids feel more financially and emotionally secure, new research shows.

The studies show the importance of families using child development accounts (CDA) as one measure to shift from an overreliance on credit and create a foundation for asset building. In other words, this program encourages households to maintain less debt and more savings. (more…)

Tag Archives: seed

Bio-inspired Fibres Change Colour When Stretched

Salt Seeds Clouds in the Amazon Rainforest

Seed Size is Controlled by Maternally Produced Small Rnas, Scientists Find

Investing in Kids’ Future Pays Off