In this paper, we explore the potentialities of using ultrasound waves as a post-irradiation treatment after proton beam writing (PBW) patterning PTFE. To that end, 2-mm-thick foils PTFE were irradiated with 2.2 MeV protons an average current 50 pA. Straight line structures patterned on polymer 3.5 × μm2 focused beam. Post-irradiation polymers placed in heat bath at 60 °C and immersed either di...

Ultrasonic irradiation of slurries produces high velocity impacts between solid metal particles that are sufficient to cause interparticle melting. Sonication of 5 mum Zn powder as a slurry in alkanes, for example, produces dense agglomerates 50 mum in diameter consisting of approximately 1000 fused particles. Particle size was found to be the most influential parameter in inducing local meltin...

Abstract Nanosized drug delivery systems have rapidly emerged as a promising approach to tumor therapy, which still many challenges in clinical application. In this study, doxorubicin-loaded O-carboxymethyl chitosan/perfluorohexane nanodroplets (O-CS-DOX NDs) were synthesized and functionally tested an effective system vitro vivo. O-CS-DOX NDs with small size (159.6 nm) good doxorubicin encapsu...

background & aim: medicinal plants are most valuable and useful sources as productive factors of drugs. production and extraction of secondary metabolites have a huge economical importance in recent years. carvone is a compound in bunium persicum fruit and shoot and, it is one of the wide range varieties of valuable and useful secondary metabolites. due to limited crop production, using app...

Fluorescent silica nanoparticles deposited with highly monodisperse gold nanoparticles (1-2 nm) were synthesized via the W/O method and intensive ultrasound irradiation. A large surface area of gold-doped fluorescent silica nanoparticle serves as a platform to immobilize a specific binding protein for biomolecules interaction in bioimaging applications.

An efficient one-pot synthesis of 1,6-diamino-2-oxo-1,2,3,4-tetrahydro- pyridine-3,5-dicarbonitrile derivatives by four-component piperidine-catalyzed reactions of a ketone, malononitrile, ethyl cyanoacetate and hydrazine hydrate under ultrasound irradiation is described. This method provides several advantages such as shorter reaction times, excellent yields, and a simple workup procedure.

Various extraction techniques were applied in the extraction of the biologically active constituents. The methods employed were traditional maceration extraction, microwave-assisted extraction(MAE), and ultrasound extraction (UE). Compared to the maceration extraction, MAE and UE methods provided high extraction yield, requiring short time frames and less labour. Microwave irradiation is a prov...

Ultrasonic irradiation dramatically affects the reactivity of a variety of inorganic solids. We have found, for example, large increases in the rates of intercalation of a wide range of compounds into various layered inorganic solids (such as ZrS2, V2O5, TaS2 and MoO3. High intensity ultrasound also enhances the heterogeneous catalysis of alkene hydrogenation by Ni powders. Scanning electron mi...

Mushrooms are a good source of protein, dietary fibre, vitamins, minerals and phenolic compounds. However, mushrooms very perishable food the implementation preservation methods is essential to extend their shelf-life. The for can be classified into three categories: thermal (drying/freezing), chemical (edible coatings, films washing solutions) physical (packing, irradiation, pulsed electric fi...

Seven 2,3-epoxy-1-phenyl-3-aryl-1-propanones were synthesized via epoxidation of the corresponding 1-phenyl-3-aryl-2-propen-1-ones with 30% aqueous hydrogen peroxide in 74-99% yields using benzyldimethyltetradecylammonium chloride as phase transfer catalyst under ultrasound irradiation.