Sources and Applications of Ultrasound

Benwell, Deirdre A.; Bly, Sara

doi:10.1007/978-1-4613-1811-8_3

Cited by 6 publications

(4 citation statements)

References 11 publications

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“…The application of short duration (30 s), medium-frequency (1 MHz) ultrasound (Merino et al, 2003;Benwell and Bly, 1987) at low power (0.05 W/cm 2 ) imposes physical modulation to the barrier property of the rabbit sclera, as reflected by a significant increase in the depth of penetration by FITC-BSA (Fig. 2).…”

Section: Discussionmentioning

confidence: 98%

Ultrasound-enhanced intrascleral delivery of protein

Cheung

Tay

et al. 2010

International Journal of Pharmaceutics

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Section: Discussionmentioning

confidence: 98%

Ultrasound-enhanced intrascleral delivery of protein

Cheung

Tay

et al. 2010

International Journal of Pharmaceutics

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“…168 Generally, UAMs entail short pulse soundwaves (typical frequency 0.025−20 MHz) which are not perceivable by humans whose absolute acoustic spectrum ranges between 20 Hz and 20 kHz. 169 Ultrasounds emit longitudinal soundwave pulses at a frequency above 20 kHz. The velocity of sound (c) heavily depends on the nature of the medium the soundwave is moving through.…”

Section: Energy Of Productionmentioning

confidence: 99%

“…Ultrasonically assisted methodologies (UAMs) are popular in many industrial fields including biomedical diagnostics (e.g., 2D, 3D, and 4D scan of fetuses), cleaning in place, and forming, welding, cutting and inspecting steels or plastics against cracks and inhomogeneities . Generally, UAMs entail short pulse soundwaves (typical frequency 0.025–20 MHz) which are not perceivable by humans whose absolute acoustic spectrum ranges between 20 Hz and 20 kHz . Ultrasounds emit longitudinal soundwave pulses at a frequency above 20 kHz.…”

Section: Energy Of Productionmentioning

confidence: 99%

Current Challenges in Microcapsule Designs and Microencapsulation Processes: A Review

Lobel,

Baiocco,

Al-Sharabi

et al. 2024

ACS Appl. Mater. Interfaces

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Microencapsulation is an advanced methodology for the protection, preservation, and/or delivery of active materials in a wide range of industrial sectors, such as pharmaceuticals, cosmetics, fragrances, paints, coatings, detergents, food products, and agrochemicals. Polymeric materials have been extensively used as microcapsule shells to provide appropriate barrier properties to achieve controlled release of the encapsulated active ingredient. However, significant limitations are associated with such capsules, including undesired leaching and the nonbiodegradable nature of the typically used polymers. In addition, the energy cost of manufacturing microcapsules is an important factor to be considered when designing microcapsule systems and the corresponding production processes. Recent factors linked to UN sustainability goals are modifying how such microencapsulation systems should be designed in pursuit of "ideal" microcapsules that are efficient, safe, cost-effective and environmentally friendly. This review provides an overview of advances in microencapsulation, with emphasis on sustainable microcapsule designs. The key evaluation techniques to assess the biodegradability of microcapsules, in compliance with recently evolving European Union requirements, are also described. Moreover, the most common methodologies for the fabrication of microcapsules are presented within the framework of their energy demand. Recent promising microcapsule designs are also highlighted for their suitability toward meeting current design requirements and stringent regulations, tackling the ongoing challenges, limitations, and opportunities.

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“…Ultrasound can be defined as a form of mechanical energy with a frequency higher than the human audible limit, i.e. higher than 20 kHz 1 . Various physical modalities may be used as adjuvant therapy for the treatment of chronic injuries, including for example, hydrotherapy, electrostimulation, lasers, pressure and ultrasound.…”

Section: Introductionmentioning

confidence: 99%

Effects of low‐intensity pulsed ultrasound on wound healing in corneas of dogs following keratoplasty

Vicenti

Laus

Neto

et al. 2003

Veterinary Ophthalmology

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The effects of low-intensity pulsed ultrasound on wound healing were evaluated at the graft-cornea transition in dogs following lamellar keratoplasty using tunica vaginalis preserved in 98% glycerin. Twenty-one dogs were subdivided into three groups of seven animals. The first group (W/US) received daily treatment of low-intensity pulsed ultrasound (20 mW/cm2) for 15 min for the first 10 days post surgery. The second group (N/US) was submitted to the same procedure but with the ultrasound apparatus turned off. The third group, the control (CO), underwent the surgical procedure only. The animals were clinically evaluated during the initial (1-15 days), intermediate (16-30 days) and late (31-120 days) postoperative period. The corneas were evaluated by light microscopy at 1, 3, 7, 15, 30, 60 and 120 days after surgery. Clinically, there were no differences which would promote an advantage to any of the treatments. Light microscopy, however, revealed more extensive vascularization and more advanced wound healing in the W/US group, as well as a tendency towards early graft incorporation. Based on the present results, low-intensity pulsed ultrasound shows advantages, especially in situations where trophic support is a mandatory condition, facilitating better graft incorporation and rapid recovery of stromal organization.

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Sources and Applications of Ultrasound

Cited by 6 publications

References 11 publications

Ultrasound-enhanced intrascleral delivery of protein

Ultrasound-enhanced intrascleral delivery of protein

Current Challenges in Microcapsule Designs and Microencapsulation Processes: A Review

Effects of low‐intensity pulsed ultrasound on wound healing in corneas of dogs following keratoplasty

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