By reducing the reflection of ultraviolet light, hollow nanoparticles called brochosomes help to protect leafhoppers from predators.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11517244 | PMC |
| http://dx.doi.org/10.7554/eLife.103508 | DOI Listing |
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Research on the acoustic emission characteristics and instability correlation effect of the dynamic response of waste dump slopes.
Sci Rep
January 2025
Yunnan Phosphating Group Co., Ltd, Kunming, 650600, China.
Due to the fluidity of the loose medium inside the waste dump slope, the traditional monitoring system cannot fully reflect the misalignment and slip between particles inside the medium, and it is also difficult to capture the precursor information of the slip of the loose accumulation body. To reveal the dynamic evolution process of the slope instability of the waste dump slope, the coupling test system of the slope instability of the waste dump slope was used to carry out the study of the acoustic emission characteristics of the slope instability dynamic response of the dump slope under the action of vibration, and to quantitatively analyse the staged characteristics of the acoustic emission parameter evolution of the dump slope under the action of different vibration frequencies and its instability initiation node. The results show that with the increase of vibration frequency, the damage mode of the slope model gradually changes from sliding of small particles to large-scale landslides, and presents the stage process of "vibration compaction → vibration equilibrium → dynamic instability"; Under the action of low-frequency and high-amplitude, the slope model mainly shows that the tiny particles and the basement gravel slip, which is difficult to capture with the naked eye, while under the action of high-frequency and low-amplitude, the slope surface is damaged in a large area, and the overall model is unstable; The dynamic instability of the waste dump slope is accompanied by obvious acoustic emission activities, and the changes of the characteristic parameters of acoustic emission reveal, to a certain extent, the evolution of the internal state of the slope in the process of dynamic instability of the waste dump slope and its stage characteristics; The amplitude and energy efficiency of acoustic emission in the time domain show obvious fractal characteristics in the dynamic instability of the waste dump slope.
View Article and Find Full Text PDFThe effect of PEO/NaCl dual porogens in the fabrication of porous PCL membranes via a solid-state blending approach.
Sci Rep
January 2025
Industrial Engineering Department, School of Applied Technical Sciences, German Jordanian University, Amman, 11180, Jordan.
In this investigation, the influence of a combination of poly(ethylene-oxide) (PEO) and salt (NaCl) as water-soluble porogens on the synthesis of sustainable porous poly(ε-caprolactone) (PCL) membranes is explored. Nine mixture compositions are examined. PCL sheets are fabricated through the cryomilling, hot pressing, and porogen leaching approach.
View Article and Find Full Text PDFThe influence of solute concentration and filtration on mesoscale clusters of flufenamic acid, a typical pharmaceutical compound, in ethanol.
J Colloid Interface Sci
December 2024
Department of Chemical Sciences, SSPC, the Research Ireland Centre for Pharmaceuticals, Bernal Institute, University of Limerick, V94 T9PX, Ireland. Electronic address:
Hypothesis: It is hypothesised in this work that mesoscale clusters will be present in both undersaturated and supersaturated solutions of organic pharmaceutical molecules. These clusters, being loose aggregates, could be sensitive to shear forces experienced during filtration. Thus, comparing the behaviour of these clusters alongside nanoparticles during filtration-an important sample treatment parameter during crystallization-will elucidate qualitative differences from solid, crystalline nanoparticles of similar size.
View Article and Find Full Text PDFGenerative adversarial networks with texture recovery and physical constraints for remote sensing image dehazing.
Sci Rep
December 2024
College of Electrical Engineering, Northeast Electric Power University, Jilin, 132012, China.
The scattering of tiny particles in the atmosphere causes a haze effect on remote sensing images captured by satellites and similar devices, significantly disrupting subsequent image recognition and classification. A generative adversarial network named TRPC-GAN with texture recovery and physical constraints is proposed to mitigate this impact. This network not only effectively removes haze but also better preserves the texture information of the original remote sensing image, thereby enhancing the visual quality of the dehazed image.
View Article and Find Full Text PDFDynamic phase transitions dictate the size effect and activity of supported gold catalysts.
Sci Adv
December 2024
Center for Rare Earth and Inorganic Functional Materials, School of Materials Science and Engineering & National Institute for Advanced Materials, Nankai University, Tianjin 300350, China.
The landmark discovery of gold catalysts has aroused substantial interest in heterogeneous catalysis, yet the catalytic mechanism remains elusive. For carbon monoxide oxidation on gold nanoparticles (NPs) supported on ceria surfaces, it is widely believed that carbon monoxide adsorbs on the gold particles, while the reaction occurs at the gold/ceria interface. Here, we have investigated the dynamic changes of supported gold NPs with various sizes in a carbon monoxide oxidation atmosphere using deep potential molecular dynamics simulations.
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