‘Turiaçu’ is a pineapple variety native to the Amazon region with high commercial potential that remains unexplored. Its propagation traditionally relies on vegetative material from mother plants, which increases the risk of pathogen transmission. Temporary immersion bioreactors (TIBs) are an alternative for large-scale production of disease-free plantlets, but their efficiency depends on the optimization of culture conditions. This study aimed to evaluate the effects of photoautotrophic and photomixotrophic in vitro cultivation of ‘Turiaçu’ pineapple under different light intensities in TIBs, as well as the subsequent ex vitro acclimatization performance of the plants. Explants were cultivated under light intensities of 71 and 116 µmol m⁻² s⁻¹, in culture media containing 0–15 g L⁻¹ of sucrose. After 50 days of in vitro growth, biometric parameters, photosynthetic pigments, gas exchange, and leaf anatomy were evaluated. Following 30 days of ex vitro acclimatization, survival, growth, and physiological performance were analyzed. The presence of sucrose in the culture medium was the main factor influencing growth and photosynthetic performance. Photoautotrophic conditions stimulated photosynthetic capacity, whereas photomixotrophic cultivation promoted greater biomass accumulation, particularly under 71 µmol m⁻² s⁻¹. Both cultivation modes resulted in 100
In this work, we present a theoretical analysis of null geodesics, critical photon orbits, and shadow formation associated with a wormhole generated by a geometric defect. The propagation of light in this spacetime is examined through the deflection angle in both weak-and strong-field regimes. Analytical expansions are derived in each regime and employed to characterize gravitational lensing observables. By varying the global monopole charge, we evaluate its impact on these observables and determine parameter ranges that may be accessible to current or future observational probes. Finally, we calculate the quasinormal modes and the time-domain solution for scalar perturbations.
We investigate quantum and classical signatures of a Schwarzschild black hole embedded in a Hernquist dark matter halo. Starting from the exact spherically symmetric solution describing this composite system, we analyze particle production for both bosonic and fermionic fields using semiclassical techniques. Hawking radiation is derived through Bogoliubov transformations and independently via the tunneling method with energy conservation, allowing us to identify the effective temperature, emission spectrum, and the role of dark matter parameters in suppressing particle creation. The evaporation process is examined in the high-frequency regime, leading to modified evaporation times and emission rates relative to the vacuum Schwarzschild case. We further study absorption and scattering of massless scalar waves employing a partial-wave analysis, computing phase shifts, partial and total cross sections, and assessing the impact of the Hernquist scale radius and density on these observables. Finally, null and timelike geodesics are explored to characterize light propagation and particle motion in the presence of the dark matter halo.
In this paper we present a ground state solution result for the nonlocal operator such as the generalized p-Laplacian operator with a logarithmic nonlinearity, for which we will use variational methods explicitly the Nehari method.
To map and describe the scientific evidence on germicidal ultraviolet C (UV-C) light for hospital surface disinfection, this scoping review examined device types, reported operational parameters, microbiological and clinical outcomes, and implementation aspects. Primary studies conducted in hospital settings and evaluating UV-C or ultraviolet germicidal irradiation on environmental surfaces were searched in four databases without date restrictions. Data were synthesized descriptively in tables and narrative form following JBI and PRISMA-ScR guidance. Eleven studies (2007–2025) met the inclusion criteria. Reported microbial reductions ranged from 1 to ≥5 log10. Higher and more consistent reductions were predominantly observed under laboratory or controlled experimental conditions, whereas reductions in real-world hospital surface sampling were more variable and influenced by pathogen type, surface material, room geometry, and shadowing. Integration of UV-C with manual cleaning and multi-position irradiation cycles was associated with greater effectiveness. Reporting of key radiometric parameters (dose, exposure time, and distance) was frequently incomplete, limiting reproducibility and cross-study comparability. Clinical findings were heterogeneous: some interrupted time-series analyses suggested reductions in healthcare-associated infections, although effects were not uniform across microorganisms. Implementation reports described room-level cycle times compatible with turnover, variable staffing requirements, and limited economic evaluation. Overall, UV-C appears to be a promising adjunct to standard cleaning practices in hospital environments. However, standardized radiometric reporting, multicenter studies, and robust clinical and economic evaluations are necessary to support safe, reproducible, and sustainable large-scale implementation.
