Sustainable ‘Plastics’ are on the Horizon


Macroalgal biomass subcritical hydrolysates for the production of polyhydroxyalkanoate (PHA) by Haloferax mediterranei

New sustainable biopolymer technology may one day free the world of its worst pollutant. A new Tel Aviv University study describes a process to make bioplastic polymers that don’t require land or fresh water – resources that are scarce in much of the world. The polymer is derived from microorganisms that feed on seaweed. It is biodegradable, produces zero toxic waste and recycles into organic waste.

The invention was the fruit of a multidisciplinary collaboration between Dr. Alexander Golberg of TAU’s Porter School of Environmental and Earth Sciences and Prof. Michael Gozin of TAU’s School of Chemistry...

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Our universe: An expanding bubble in an extra dimension

In their article, the scientists propose a new model with dark energy and our Universe riding on an expanding bubble in an extra dimension. The whole Universe is accommodated on the edge of this expanding bubble.
Credit: Suvendu Giri

Uppsala University researchers have devised a new model for the Universe – one that may solve the enigma of dark energy. Their new article, published in Physical Review Letters, proposes a new structural concept, including dark energy, for a universe that rides on an expanding bubble in an additional dimension.

We have known for the past 20 years that the Universe is expanding at an ever accelerating rate. The explanation is the “dark energy” that permeates it throughout, pushing it to expand...

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Discovery of Topological LC Circuits Transporting EM Waves Without Backscattering


Microstrip arrays used in this research.
Credit: NIMS

Engineers have succeeded in fabricating topological LC circuits arranged in a honeycomb pattern where electromagnetic (EM) waves can propagate without backscattering even when pathways turn sharply. These circuits may be suitable for use as high-frequency electromagnetic waveguides, which would allow miniaturization and high integration in various electronics devices, such as mobile phones.

There has been a surge in searching for materials with topological properties, whose functions are not influenced even if the sample shapes are changed...

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New Source of very high energy Gamma-ray emission detected in the neighborhood of the Supernova Remnant G24.7+0.6

New source of very high energy gamma-ray emission detected in the neighborhood of the supernova remnant G24.7+0.6

1◦ × 1◦ significance map of the region obtained with MAGIC. MAGIC J1835–069 is marked with a blue line. Credit: Acciari et al., 2018.

Using MAGIC telescopes and NASA’s Fermi spacecraft, an international team of astronomers has discovered a new source of very high energy gamma-ray emission around the supernova remnant (SNR) G24.7+0.6.

Supernova remnants are basically leftovers of massive stars that ended their lives in huge explosions called supernovae. Astronomers generally distinguish three types of SNRs, one of which is the composite SNR—these having rapidly expanding shells from the supernova blast wave accompanied by wind nebulae powered by young pulsars formed in the explosions.

Observations show that composite SNRs are known to accelerate particles to very high e...

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