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We demonstrate that amplitude modulation of a high-peak-power femtosecond laser pulse allows to change fundamentally the frequency-angular structure (FAS) of the supercontinuum formed during the filamentation in both molecular and atomic gases. Particularly, modulation with a 4-hole mask forms an inverted pattern of conical emission (CE) with its predominance in the Stokes wing of the pulse spectrum. We explain this phenomenon as a joint effect of self-phase modulation and temporal pulse splitting of interfering beamlets formed by the modulating mask.
View Article and Find Full Text PDFCharacterization of tripartite motif containing 59 (TRIM59) in Epinephelus akaara: Insights into its immune involvement and functional properties in viral pathogenesis, macrophage polarization, and apoptosis regulation.
Fish Shellfish Immunol
February 2025
Department of Marine Life Sciences & Center for Genomic Selection in Korean Aquaculture, Jeju National University, Jeju, 63243, Republic of Korea; Marine Life Research Institute, Jeju National University, Jeju, 63333, Republic of Korea. Electronic address:
The tripartite motif-containing (TRIM) superfamily is the largest family of RING-type E3 ubiquitin ligases that is conserved across the metazoan kingdom. Previous studies in mammals have demonstrated that TRIM59 possesses ubiquitin-protein ligase activity and acts as a negative regulator of NF-κB signaling. However, TRIM59 has rarely been characterized in fish.
View Article and Find Full Text PDF[Population Dynamics and Key Influencing Factors of Caused Sludge Bulking].
Huan Jing Ke Xue
November 2024
Tianjin Key Laboratory of Aquatic Science and Technology, School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin 300384, China.
Article Synopsis
- A study investigated the occurrence of sludge bulking in municipal wastewater treatment plants caused by filamentous bacteria overgrowth during low temperatures.
- Researchers used a lab-scale reactor to simulate bulking phenomena and analyzed the dynamics of filamentous bacteria, focusing on key factors affecting their growth and extinction.
- Results revealed that lower temperatures and sludge loading significantly influenced the competition between different types of filamentous bacteria, with low sludge loading stabilizing certain populations while higher loading led to their decline.
Exploration of the Out-of-Phase Phenomenon in Shake Flasks by CFD Calculations of Volumetric Power Input, ka Value and Shear Rate at Elevated Viscosity.
Biotechnol Bioeng
November 2024
AVT - Biochemical Engineering, RWTH Aachen University, Aachen, North Rhine-Westphalia, Germany.
Culture broth with secreted macromolecules and culture broth of filamentous fungi showing disperse growth exhibit elevated viscosity, usually with shear-thinning flow behavior. High viscosity, however, poses a serious challenge in the production and research of these compounds and organisms. It commonly causes insufficient mixing and oxygen transfer in large- and small-scale bioreactors.
View Article and Find Full Text PDFAs a class of integer-order vector beams, hybridly polarized vector beams (HPVBs) are widely used in focus shaping, femtosecond laser filamentation, linear and nonlinear polarization evolution, etc. Recently, fractional-order vector beams have gained widespread interest due to their more control parameters, rich photophysical properties, and novel nonlinear optical phenomena. In this work, we report the experimental generation, focusing and propagation characteristics, and spatial self-phase modulation (SSPM) phenomenon of fractional-order HPVBs.
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