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Using tremendous photon statistics gained with the stray light aperture of the NuSTAR telescope over 11 years of operation, we set strong limits on the emission of close to monochromatic photons from the radiative decays of putative dark matter sterile neutrinos in the Milky Way. In the energy range of 3-20 keV covered by the NuSTAR, the obtained limits reach the bottom edge of theoretical predictions of realistic models where sterile neutrinos are produced in the early Universe. Only a small region is left to explore, if the sterile neutrinos form the entire dark matter component.
View Article and Find Full Text PDFEjaculation-sparing enucleation of the prostate with Thulium: Yag laser (ES-ThuLEP) versus Thulium Fiber laser (ES-ThuFLEP): outcomes on sexual function.
World J Urol
January 2025
Department of Urology, Azienda Socio Sanitaria Territoriale Lariana, Como, Italy.
Purpose: To compare the effect on sexual function of ejaculation-sparing enucleation of the prostate using Thulium: YAG laser (ES-ThuLEP) versus continuous-wave Thulium Fiber Laser (ES-ThuFLEP).
Methods: 112 patients with lower urinary tract symptoms secondary to benign prostatic hyperplasia who wished to preserve ejaculation were treated. 58 patients underwent ES-ThuLEP (Group A) using the Cyber TM generator.
Sustainable catalysts in a short time: harnessing bacteria for swift palladium nanoparticle production.
Nanoscale
January 2025
Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Pr. 47, Moscow 119991, Russia.
Adapting biological systems for nanoparticle synthesis opens an orthogonal Green direction in nanoscience by reducing the reliance on harsh chemicals and energy-intensive procedures. This study addresses the challenge of efficient catalyst preparation for organic synthesis, focusing on the rapid formation of palladium (Pd) nanoparticles using bacterial cells as a renewable and eco-friendly support. The preparation of catalytically active nanoparticles on the bacterium VKM B-3302 represents a more suitable approach to increase the reaction efficiency due to its resistance to metal salts.
View Article and Find Full Text PDFEcdysteroids in Native Trees and Callus Cultures of the Genus Vitex L. of the Flora of Russia and Vietnam.
Phytochem Anal
January 2025
Institute of Biology, Federal Research Centre Komi Science Center, Ural Branch of the Russian Academy of Sciences, Syktyvkar, Russia.
Introduction: Vitex L. is a large genus of tropical and subtropical trees used in medicine of many nations. Some species are used in gynecology due to flavonoids, iridoids, and diterpenes.
View Article and Find Full Text PDFMycobacteriophages are viruses that specifically infect bacteria of the Mycobacterium genus. A substantial collection of mycobacteriophages has been isolated and characterized, offering valuable insights into their diversity and evolution. This collection also holds significant potential for therapeutic applications, particularly as an alternative to antibiotics in combating drug-resistant bacterial strains.
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