11j Sbbt

Figure 1 Sound frequencies (Hz, cycles per second). □, human hearing 16 Hz-16kHz; power 20 kHz-100 kHz (clearing plastic welding sonochemistry); ■, high frequency 1 MHz-10 MHz (medical diagnosis, chemical analysis). (From Mason TJ (1991).)

tion, e.g., cleaning, drilling, soldering, acceleration of chemical reactions, emulsification, sterilization, flotation, homogenization, dissolution, deaggregation of powder, disruption of biological cells, extraction, crystallization, oxidation, etc. A further advantage of the above-mentioned ultrasound-assisted processes is the relative simplicity of both method development and instrumentation.

A brief description of ultrasound fundamentals as well as a discussion of its applications for solid-liquid extraction is given below.

Solar Panel Basics

Solar Panel Basics

Global warming is a huge problem which will significantly affect every country in the world. Many people all over the world are trying to do whatever they can to help combat the effects of global warming. One of the ways that people can fight global warming is to reduce their dependence on non-renewable energy sources like oil and petroleum based products.

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