New study investigates the passage of knotted DNA through nanopores

Anyone who has been on a sail boat knows that tying a knot is the best way to secure a rope to a hook and prevent slippage. Similarly, knots in sewing threads prevent them slipping through two pieces of fabric. How, then, can long DNA filaments, which have convoluted and highly knotted structure, manage to pass through the tiny pores of various biological systems? This is the fascinating question addressed by Antonio Suma and Cristian Micheletti, researchers at the International School for Advanced Studies (SISSA) in Trieste, who used computer simulations to investigate the dynamics of the molecule in such situations. The study has just been published in PNAS, the journal of the National Academy of Sciences of the Unites States.

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Flexible electronic devices with roll-to-roll overmolding technology

VTT Technical Research Centre of Finland has, for the first time, performed all manufacturing stages for a flexible in-moulded LED foil with a roll-to-roll process. The purpose of this demo is to prove the suitability of the technique for the highly cost-effective manufacture of products such as flexible LED displays containing printed electronics.

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Poor outlook for Antarctic biodiversity

An international study involving scientists from British Antarctic Survey (BAS) has debunked the popular view that Antarctica and the Southern Ocean are in a much better environmental shape than the rest of the world.

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Fears for Indonesian park’s rare species as Trump town rises

GUNUNG GEDE PANGRANGO, Indonesia (AP) -- Shrouded in mist and cloud, the twin volcanoes of the lushly forested Gunung Gede Pangrango national park are the brooding guardians of nature's last stand on teeming Java island. Indonesia's overflowing, polluted capital is a couple of hours north, and with Trump-branded properties being built next to this protected area, Jakarta may soon feel even closer....

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Fears for Indonesian park’s rare species as Trump town rises

GUNUNG GEDE PANGRANGO, Indonesia (AP) -- Shrouded in mist and cloud, the twin volcanoes of the lushly forested Gunung Gede Pangrango national park are the brooding guardians of nature's last stand on teeming Java island. Indonesia's overflowing, polluted capital is a couple of hours north, and with Trump-branded properties being built next to this protected area, Jakarta may soon feel even closer....

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Degree of Ice Particle Surface Roughness Inferred from Polarimetric Observations

Abstract: The degree of surface roughness of ice particles within thick, cold ice clouds is inferred from multidirectional, multi-spectral satellite polarimetric observations over oceans, assuming a column-aggregate particle habit. An improved roughness inference scheme is employed that provides a more noise-resilient roughness estimate than the conventional best-fit approach. The improvements include the introduction of a quantitative roughness parameter based on empirical orthogonal function analysis...

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