Results 41 to 50 of about 35,825 (307)

Reviving the sound of a 150-year-old insect: The bioacoustics of Prophalangopsis obscura (Ensifera: Hagloidea).

open access: yesPLoS ONE, 2022
Determining the acoustic ecology of extinct or rare species is challenging due to the inability to record their acoustic signals or hearing thresholds.
Charlie Woodrow   +3 more
doaj   +1 more source

Silicon based GHz acoustic lenses for time resolved acoustic microscopy

open access: yes, 2022
S.1605-1608A method is shown to produce silicon based acoustic lenses in the GHz-range for the time resolved acoustic microscopy of biological cells. The method avoids the problem of disturbing echoes from the rim around the lens cavity.
Jakob, A.   +5 more
core   +1 more source

Ultrasensitive Anti‐Stokes Luminescence Thermometry in Transition Metal Dichalcogenide Monolayers

open access: yesAdvanced Functional Materials, EarlyView.
We demonstrate a highly sensitive nanothermometer using anti‐Stokes photoluminescence, also known as photoluminescence upconversion (UPL), in monolayer tungsten disulfide. A strong resonantly enhanced UPL is observed, confirming the central role of optical phonons in the PL upconversion mechanism.
Sharada Nagarkar   +6 more
wiley   +1 more source

Ultrasound Microscopy-Based Identification of Enamel and Restorative Materials: An Ex Vivo Acoustic Impedance Study

open access: yesInternational Dental Journal
Introduction and aims: Differentiating restorative materials from enamel during dental examinations is challenging because of their similar appearances.
Yukihiro Naganuma   +4 more
doaj   +1 more source

Modification of Olive Leaves’ Surface by Ultrasound Cavitation. Correlation with Polyphenol Extraction Enhancement

open access: yesApplied Sciences, 2020
We investigated the impact of ultrasound at 20 kHz on olive leaves to understand how acoustic cavitation could increase polyphenol extraction. Application of ultrasound to whole leaf from 5 to 60 min enabled us to increase extraction from 6.96 to 48.75 ...
Natacha Rombaut   +5 more
doaj   +1 more source

Acoustic Attenuation of COVID-19 Face Masks: Correlation to Fibrous Material Porosity, Mask Breathability and Bacterial Filtration Efficiency

open access: yesAcoustics, 2022
This paper presents an experimental study on acoustic attenuation of different types of face masks in use by the general population during the COVID-19 pandemic. In particular, measurements are performed on ten samples of masks, of which four are medical
Milena Martarelli   +6 more
doaj   +1 more source

Acoustic microscopy in orthodontology

open access: yes, 2017
Aim. Assessment of the possibility to use the method of ultrasound acoustic microscopy to control the state of microstructure of hard tooth tissues under the brackets. Methods.
Z V Gasymova
core   +1 more source

3D Printing Innovations in Polymeric Porous and Patterned Architecture

open access: yesAdvanced Functional Materials, EarlyView.
Polymeric foams occupy a unique structural space between dense solids and open networks, where engineered void fraction governs mechanical compliance, thermal resistance, and mass transport. Additive manufacturing now enables precise spatial control over cellular architecture, unlocking designer foam structures across applications spanning crash ...
Dhanush Patil   +13 more
wiley   +1 more source

Combined Phase-Sensitive Acoustic Microscopy And Confocal Laser Scanning Microscopy

open access: yes, 2006
Combined phase-sensitive acoustic microscopy (PSAM) at 1.2 GHz and confocal laser scanning microscopy (CLSM) in reflection and fluorescence has been implemented and applied to polymer blend films and fluorescently labeled fibroblasts and neuronal cells ...
Ngwa, Wilfred   +4 more
core   +2 more sources

Non-Destructive Observations of Internal Microstructures of Materials by Scanning Electron-Induced Acoustic Microscopy [PDF]

open access: yes, 2006
The scanning electron-induced acoustic microscopy (SEAM) has been developed as a new tool for non-destructive observations of the internal microstructures of materials.
塩田, 剛   +2 more
core  

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