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Nel cuore dell'Etna: come le onde sismiche ci raccontano i segreti del vulcano

Nel cuore dell'Etna: come le onde sismiche ci raccontano i segreti del vulcano

28 Maggio 2025

La mappa mostra il sistema magmatico ricostruito sotto il Monte...

Tonno rosso, da oggi in vigore l’obbligo del sigillo di garanzia

Tonno rosso, da oggi in vigore l’obbligo del sigillo di garanzia

27 Maggio 2025

Per il WWF si tratta di un'importante misura che rafforza...

I “difetti” del diamante migliorano le prestazioni del bit quantistico

I “difetti” del diamante migliorano le prestazioni del bit quantistico

27 Maggio 2025

Un metodo di fabbricazione ibrido sviluppato nell'ambito del progetto LasIonDef...

Bodybuilding: studio internazionale lancia l'allarme sull'aumento del rischio di morte improvvisa

Bodybuilding: studio internazionale lancia l'allarme sull'aumento del rischio di morte improvvisa

26 Maggio 2025

Pubblicata un’indagine su oltre 20.000 atleti che lancia l’allarme su...

Il Metabolismo e la Metabolomica nell'Invecchiamento, nella Senescenza e nelle Patologie Correlate all'Età: Una Prospettiva Integrata Multiscala

Il Metabolismo e la Metabolomica nell'Invecchiamento, nella Senescenza e nelle Patologie Correlate all'Età: Una Prospettiva Integrata Multiscala

22 Maggio 2025

La senescenza cellulare, l'invecchiamento organismico e le patologie correlate all'età...

Venerdì, 18 Ottobre 2024



Research published in Nature Genetics on Oct.14, by Yale Cancer Center researchers at Yale School of Medicine, found a higher concentration of a specific kind of DNA — extrachromosomal or ecDNA — in more aggressive and advanced cancers that could mark them as targets for future therapies.

Using data available from The Cancer Genome Atlas, the International Cancer Genomics Consortium, the Hartwig Medical Foundation, and the Glioma Longitudinal Analysis Consortium, the researchers considered more than 8,000 tumor samples, divided between newly diagnosed untreated tumors and those that had been through previous treatments such as chemotherapy, radiation, and others. They found significantly higher amounts of ecDNA in tumors from previously treated patients, leading to the theory that ecDNA might give a survival advantage to those tumors.

“Our research suggests that ecDNA helps tumors become more aggressive,” said senior author of the paper, Roel Verhaak, the Harvey and Kate Cushing Professor of Neurosurgery at Yale School of Medicine and member of Yale Cancer Center. “EcDNA has a distinct mechanism and plays an important role, not just for breast or lung cancer, but across many cancer types.”

Pubblicato in Scienceonline
Venerdì, 18 Ottobre 2024 10:49

The origin of most meteorites finally revealed



Understanding where shooting stars and meteorites come from is a question that scientists have been trying to answer since ancient times.
Until recently, only 6% of meteorite falls had been linked to their source.
A team led by scientists from CNRS, ESO, and Charles University has notably shown that 70% of all meteorite falls come from just three young asteroid families.
An international team led by three researchers from the CNRS1, the European Southern Observatory (ESO, Europe), and Charles University (Czech Republic) has successfully demonstrated that 70% of all known meteorite falls originate from just three young asteroid families. These families were produced by three recent collisions that occurred in the main asteroid belt 5.8, 7.5, and about 40 million years ago. The team also revealed the sources of other types of meteorites; with this research, the origin of more than 90% of meteorites has now been identified. This discovery is detailed in three papers, a first published on 13 September 2024 in the journal Astronomy and Astrophysics, and two new papers to be published on 16 October 2024 in Nature.

Pubblicato in Scienceonline

University of Illinois Urbana-Champaign aerospace engineering Ph.D. student Nicolas Rasmont assembling his radar inferometry instrument in the lab.



Researchers at the University of Illinois Urbana-Champaign developed a new instrument to measure the density of the dust that kicks up when spacecraft thrusters interact with planetary surfaces as it lands. Because cameras and other optical equipment are blinded by dense dust clouds, the new instrument uses millimeter-wave radar in a new way to accurately measure the dust and debris.

“Other measurement techniques exist, but our instrument addresses a sort of ‘missing middle.’ It is applicable to particle clouds which are too dense for optical measurements but too thin for state-of-the-art opaque multiphase techniques like X-rays or MRI. It is also capable of several thousands of measurements per second,” said Nicolas Rasmont, Ph.D. student in the Department of Aerospace Engineering. “Our instrument uses a radar to generate waves with a wavelength of 3.8 mm, just over an eighth of an inch. The wave travels through a cloud of particles, then is reflected, then captured back by our instrument to detect the presence of the particles.”

Pubblicato in Scienceonline

 

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Autorizzazioni del Tribunale di Roma – diffusioni:
telematica quotidiana 229/2006 del 08/06/2006
mensile per mezzo stampa 293/2003 del 07/07/2003
Scienceonline, Autorizzazione del Tribunale di Roma 228/2006 del 29/05/06
Pubblicato a Roma – Via A. De Viti de Marco, 50 – Direttore Responsabile Guido Donati

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