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Environment
Climate change and land-use practices threaten traditional food sources in Russia’s Far East
Proportion of wild food consumed by households in different settlements in each region of the Sakha Republic. Credit: PNAS Nexus (2024). DOI: 10.1093/pnasnexus/pgae523 Climate change and land-use practices could significantly alter the composition and availability of wild traditional foods in Russia’s vast Far East. This area is home to many indigenous peoples who rely on indigenous food. Native plants, animals,…
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Science
Aerial observations identify major sources of U.S. landfill methane emissions
An example image of a landfill site where methane is emitted from the working face. Credit: Environmental Science and Technology (2024). DOI: 10.1021/acs.est.4c07572 Through tests from aircraft, the research team found that landfill faces tend to be the largest source of methane emissions in U.S. landfills. Their findings are published in the journal Environment Science and Technology. The researchers are…
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Physics
Observation of gain-induced group delay between multiphoton pulses generated in spontaneous downconversion sources
Deformation of the shape of a photon pair as the spontaneous parametric downconversion interaction strength increases (from left to right). Credit: Thekkadath et al. Spontaneous parametric downconversion (SPDC) and spontaneous four-wave mixing are powerful nonlinear optical processes that can generate multiphoton light beams with unique quantum properties. These processes can be exploited to create a variety of quantum technologies, such…
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Chemistry
Exploration of new liquid organic hydrogen carrier materials for safer and transportable energy sources
Optimization of LOHC molecules using molecular engineering approaches. Change in the position of the methyl group in nitrogen-containing bicyclic LOHC (left) and hydrocarbon tricyclic LOHC (right). Credit: Korea Research Institute of Chemical Technology (KRICT) To reduce CO2 emissions, an energy transition from carbon-based energy systems to more sustainable systems based on hydrogen energy is urgently needed. However, the properties of…
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Space & Cosmos
Microquasars near the Earth emerge as powerful radiation sources
Microquasar V4641 A source of high-energy cosmic rays near Sag. The left side has an energy of over tera electron volts, and the right side has an energy of several hundred tera electron volts. The location of the microquasar is marked with a yellow dot. Credit: IFJ PAN / HAWC Modern astronomy has clung to the idea that relativistic outflows…
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