Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 18 of 18 for “"Ultrasound treatment"”.
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Ultrasonication as an abiotic elicitor - effects on antioxidant capacity and overall quality of romaine lettuce
… that low acoustic power density (APD) ultrasound, as a form of physical energy, could stimulate the biological stress defense response system of a plant to increase its own secondary metabolite accumulation to achieve added nutritional value and better quality retention. The effect of …
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Effects of different frequencies and other variables on the salicylic acid and terephthalic acid dosimeters applied to the advanced Fenton process and activated carbon cloth
… pollutants. The effectiveness of six high ultrasound frequencies (378 kHz, 583 kHz, 862 kHz, 995 kHz, 1144 kHz, and 1175 kHz) and one low ultrasound frequency (20 kHz) for the production of hydroxyl radicals was determined by use of the salicylic acid (SA) and terephthalic acid (TA) …
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Effects of high intensity focused ultrasound on the intervertebral disc
… study and try to optimise high intensity focused ultrasound treatment of the intervertebral disc. We demonstrated that it was possible to heat intervertebral discs with HIFU delivered by 50 or 5 mm diameter ultrasound transducers. Finite element studies indicated that it would be possible to heat …
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Pressure Variation Assisted Fiber Extraction and Development of High Performance Natural Fiber Composites and Nanocomposites
… fiber extraction however is a complex task. The ultrasound, which creates pressure variation in the medium, was employed to extract nano-size cellulose particles from microcrystalline cellulose (MCC). The length and the intensity of the cavitations were evaluated. Electron microscopy studies …
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Investigation on Factors Influencing Ultrasound-assisted Surface Decontamination of Fresh and Fresh-cut Vegetables
… current commercial operations rely on a wash treatment with an antimicrobial agent as the only step for reducing microbial populations on fresh produce. However, washing with a sanitizer has been demonstrated to achieve no more than 1-2 log reduction in pathogen populations. In recent years, …
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High Intensity Ultrasound Processing of AlNi (50 wt.% Ni) Particles for Electrocatalytic Water Splitting
… on the processing of metal alloy particles with ultrasound of high intensity (HIUS) for potential application in electrocatalytic water splitting process for hydrogen generation. During ultrasonic treatment of metal particles the changes in bulk (crystallite size, microstrain) and surface …
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Conformable Ultrasound Face Patch for Cavitation-enhanced Transdermal Cosmeceutical Delivery
… In this thesis, we develop a conformable ultrasound face patch (cUFP) that closely adheres to the facial skin to aid in the penetration and absorption of cosmeceuticals across the epidermis and dermis layers of the skin. A novel face mask design with piezoelectric transducers embedded in a …
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Pharmacokinetics of Ultrasonically-Released, Micelle-Encapsulated Doxorubicin in the Rat Model and its Effect on Tumor Growth
Chemotherapy is one of the most successful cancer treatments used today. Unfortunately, the amount of chemotherapy a patient can receive is limited by the associated negative side effects, such as cardiotoxicity, immune system suppression, and nephrotoxicity. Encapsulation of these drugs, …
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The potential antioxidant and anticancer properties of polyamines and their response to high-intensity ultrasonication
… various in vitro assays; (2) study the effect of ultrasound on secondary metabolite synthesis (polyamines) and maintenance of lettuce quality. Antioxidant capacity of polyamines was compared using two commonly used antioxidant capacity assays. The inhibitory effect of polyamines on cancer cell …
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Investigation of Microbubble-enhanced Mild Hyperthermia with Focused Ultrasound for Drug Delivery Enhancement
… doses of these drugs are needed for effective treatment, which can result in adverse side effects. Research has shown that elevating the temperature of the tumor by 5-10 ℃, defined as mild hyperthermia, results in increased drug uptake of the tumor. Heating of the tumor can be performed via …
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Shear-wave imaging guidance for high-intensity focused ultrasound therapy
High-intensity focused ultrasound (HIFU) has attracted many research interests during the last three decades (since 1980s) for the precision of this treatment in the field of medical oncology and brain surgery. Even though the precision of HIFU application/exposure is particularly high, the overall …
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The Effects of Low Intensity Ultrasound on Chondrogenic Differentiation of Rabbit Mesenchymal Stem Cells In Vivo
In this study of using a low-intensity ultrasound (LIUS), investigated the effects of LIUS on chondrogenic differentiation of bone marrow-derived mesenchymal stem cells (BM-MSCs). The hypothesis is that LIUS may be a non-invasively effective stimulant to a biological system in vivo by turning on …
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Focused Ultrasound Methods for the treatment of Tendon Injuries
… is widely accepted that mechanical-loading based treatments offer long-term symptomatic resolution and improved functionality, the exact mechanisms of action of such mechanotransduction-based healing cascades remain unclear. Nevertheless, there is significant motivation for the development of …
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Use of Echogenic Immunoliposomes For Delivery of Both Drug and Stem Cells For Inhibition of Atheroma Progression
… endothelial cells under inflammatory conditions. Ultrasound enhanced liposomal targeting provides a method for stem cell delivery into atheroma and encapsulated drug release. This project is designed to examine the ability of echogenic liposomes to deliver bevacizumab and stem cells to inhibit …
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Effect of Cellulose Nanocrystals on the Rheology, Curing Behavior, and Fracture Performance of Phenol-Formaldehyde Resol Resin
… CNC aggregates, which could be disrupted by ultrasound treatment. The curing progressions of the resin and CNC–resin mixtures were analyzed by non-isothermal differential scanning calorimetry (DSC). The DSC curves showed two exotherms followed by an endotherm. The energy of activation for the …
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Reconstruction of milk fat globules/membrane (MFGs/MFGM) and characterization of its physicochemical properties and techno-functionalities
… (pH 6.30 and 5.30, 25℃), and novel non-thermal treatment, ultrasonic treatments with different intensities. Additionally, anionic polysaccharide- high-methoxyl pectin (HMP) was incorporated to the raw milk before the cream separation, examining the resulting physicochemical properties and …
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Controlled fortification of apple chips by osmotic dehydration
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2024-08-01
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Investigation of the effects of emerging technologies on the kinetics of glycolytic and proteolytic enzymes relevant for meat quality
… post-mortem. Innovative technologies such as ultrasound and high pressure processing have also been investigated to determine their effects on meat quality, with varying results and further studies in this area are warranted. Therefore, the objectives of the research were to investigate the …