Scientists are rethinking bamboo as a powerful new superfood - Science Daily

Des chercheurs indiens transforment la soudure de déchets de circuits imprimés en nanoparticules d'oxyde d'étain de 7,6 nm pour la dégradation des colorantsDes chercheurs à Goa, en Inde, ont converti de l'étain récupéré de soudures de cartes de circuits imprimés usagées en nanoparticules fonctionnelles de dioxyde d'étain, comme le rapporte le Journal of Nanoparticle Research. La lixiviation acide met l'étain en solution avant sa conversion en SnO2 nanostructuré. La diffraction des rayons X a confirmé une phase rutile tétragonale et la spectroscopie photoélectronique X a montré que l'étain se trouve presque entièrement sous forme Sn(IV). La microscopie électronique a révélé des particules quasi sphériques d'un diamètre moyen de 7,6 nm, offrant une grande fraction surfacique pour la photocatalyse. Sous lumière UV, le matériau a éliminé 100 % de la rhodamine B en 165 minutes et réduit la demande chimique en oxygène de 95,2 %, indiquant une quasi-minéralisation ; la cinétique était de pseudo-premier ordre avec une constante de vitesse de 0,0114 par minute. L'efficacité est restée à 91,96 % après cinq cycles.

)The immortal jellyfish is capable of winding back its lifecycle to become young again. Scientists are unlocking its cellular secrets for new strategies to treat diseases of old age. The tiny translucent jellyfish Turritopsis dohrnii is surprisingly hard to kill. The marine biologist Maria Miglietta of Texas A&M University at Galveston has cut them, boiled them, starved them, overloaded their tanks with salt or plopped them in fresh water – but the nifty creatures seem to cheat death every time. Under duress, they stop in their tracks and fall to the bottom of their tank. Then something astonishing happens: the animals transform into balls of cells that bear no resemblance to the tentacled umbrella shape of adult jellyfish, known as the medusa. Within one to three days, a structure called a polyp – an early jellyfish life stage – buds off from this ball of cells and then grows into a colony, which will eventually sprout new medusae. "From one jellyfish that doesn't die, then you get this colony that can form hundreds more," Miglietta says.

The Southern Fish is home to the bright luminary Fomalhaut, a lovely young star that shines brightly in the evening sky. Look south late this evening to find the bright star Fomalhaut in Piscis Austrinus above the horizon, forming a large triangle with the Moon to its upper right and Saturn to its upper left. Credit: Stellarium/USGS/Celestia/Clementine

As NASA continues humanity’s slow march back to the Moon, different pieces of the puzzle of establishing a more permanent base there are falling into place. One of these pieces is the the Lunar Terrain Vehicle (LTR), and [Cleo Abram] and [Michelle Khare] got a look at the LTR candidate from Lunar Outpost. Designed to help astronauts traverse the lunar surface as well as function as a semi-autonomous rover when uncrewed, the LTR will be an integral part to any future Moon base. NASA announced earlier this year that it would be moving forward with the LTR featured in this video and another from competitor Astrolab. Regardless of manufacturer, the LTR will have to deal with some wild conditions in the lunar environment.