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[Objective] purple yam (Dioscoreaceae, Dioscorea alata Linn), as raw materials, can explore the anthocyanins extraction. [Method] ultrasonic-assisted extraction technology was used to extract anthocyanins, the optimum condition was determined through Central Composite center-united experiment design. Based on the single-factor experiments, using solid-liquid ratio, extraction time, ultrasonic frequency...
Rice straw can be utilized to use as a raw material for production of biofuel due to its content with a high amount of sugar in a form of 35-40% w/w cellulose and 25-30% w/w hemicelluloses. The effect of ultrasonic treatment to enhance the saccharification process of the enzymatic hydrolysis from rice straw was investigated. Two frequencies at 20 and 24 kHz of ultrasonic treatment were used for 80...
The demand for an increasing efficiency of ultrasonic cleaning in industrial manufacturing cannot be satisfied with the current empirical design approaches. This article describes the development of tools for the characterization of cavitation effects, which are the most important mechanisms of cleaning impact. The approach is based on the measurement of cavitation intensity by the assessment of characteristic...
The device for ultrasonic drying having improved technical specifications obtained due to drying chamber of special form is described in the article. The results of experiments showed that ultrasonic drier has maximum efficiency during the drying of capillary-porous materials. It was found out that the maximum efficiency can be achieved with ultrasonic exposure together with supply of heated (no more...
In the conditions of economic crisis the most actual technologies are technologies used local materials or waste as a fuel. The technological equipment for pressing of fuel briquettes from fibrous materials (straw with flammable powder) was developed. It allowed to transfer mechanical vibrations of high-intensity ultrasonic frequency on the press-form and provided the quality improvement of produced...
Microsphere particles have been introduced in a wide range of bio-medical applications, such as controlled drug delivery system and tissue repair materials. Microspheres can be produced in many ways including emulsion and stirring. These traditional methods have many restrictions such as large microspheres, production of air bubbles in the microspheres, uneven size and uneven morphology. All these...
On the basis of method of symmetries correlations, allowing to conduct the search of new configurations of acoustic thickeners of enhanceable efficiency, which can find a wide use in an ultrasonic technique and technologies, are got. Mathematical models, which the pre-production models of thickeners by which by the lead through of technical experiment verification of positions of the offered theory...
A laser generation and optical difference detection method of surface acoustic waves is used for characterizing elastic constants of thin films deposited on substrates. The film/substrate samples are prepared by a RF magnetron sputtering technique. Teflon-like films, deposited on three kinds of substrates, silicone plates, glass and copper plates, have been studied and the related parameters have...
In the article describes the device for ultrasonic drying possessing enhanced specification received due to application drying chamber of the special form.
In the article theory of ultrasonic drying is stated. The possibility of ultrasonic field creation with intensity about 150 dB by means of disk radiators in closed volume of drying chambers is considered. The prototype of ultrasonic dryer for carrying out experiments on various drying materials is described; results of preliminary experiments on drying of gelatin, peas, fabric and carrots are presented.
Influence of surface strengthening by nanostructuring surface layer being implemented by ultrasonic impact treatment and deposition of high-strength nanostructured coating was investigated under friction of 30CrMnSi2Ni steel specimens at boundary lubrication. It is shown that formation of uniform nanostructured state in thin subsurface layer with gradient changing of strength with depth of the specimens...
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