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Träfflista för sökning "WFRF:(Aldama L.) srt2:(2020-2022)"

Sökning: WFRF:(Aldama L.) > (2020-2022)

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  • Carrillo, M., et al. (författare)
  • High-resolution crystal structures of transient intermediates in the phytochrome photocycle
  • 2021
  • Ingår i: Structure. - : Elsevier BV. - 0969-2126. ; 29:7
  • Tidskriftsartikel (refereegranskat)abstract
    • Phytochromes are red/far-red light photoreceptors in bacteria to plants, which elicit a variety of important physiological responses. They display a reversible photocycle between the resting Pr state and the light-activated Pfr state. Light signals are transduced as structural change through the entire protein to modulate its activity. It is unknown how the Pr-to-Pfr interconversion occurs, as the structure of intermediates remains notoriously elusive. Here, we present short-lived crystal structures of the photosensory core modules of the bacteriophytochrome from myxobacterium Stigmatella aurantiaca captured by an X-ray free electron laser 5 ns and 33 ms after light illumination of the Pr state. We observe large structural displacements of the covalently bound bilin chromophore, which trigger a bifurcated signaling pathway that extends through the entire protein. The snapshots show with atomic precision how the signal progresses from the chromophore, explaining how plants, bacteria, and fungi sense red light.
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3.
  • Sarmiento, S., et al. (författare)
  • Continuous-variable quantum key distribution over a 15 km multi-core fiber
  • 2022
  • Ingår i: New Journal of Physics. - : IOP Publishing. - 1367-2630. ; 24:6
  • Tidskriftsartikel (refereegranskat)abstract
    • The secure transfer of information is critical to the ever-increasing demands of the digital world. Continuous-variable quantum key distribution (CV-QKD) is a promising technology that can provide high secret key rates over metropolitan areas, using conventional telecom components. In this study, we demonstrate the utilization of CV-QKD over a 15 km multi-core fiber (MCF), in which we take advantage of one core to remotely frequency lock Bob's local oscillator with Alice's transmitter. We also demonstrate the capacity of the MCF to boost the secret key rate by parallelizing CV-QKD across multiple cores. Our results indicate that MCFs are promising for the metropolitan deployment of QKD systems.
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