Canan Ece Tamer

A Traditional Turkish Beverage: Salep

Salep is produced from tubers of orchids that grow naturally in various regions of Turkey. It constitutes the raw material of a traditional Turkish beverage and is used for giving hardness and elasticity to Kahramanmaras-type of ice cream. Salep also is used as a raw material for some drugs. Botanists have reported that continuous and uncontrolled harvesting causes some orchid species to decrease to a critical level. For this reason, exportation of salep was prohibited by the Turkish Ministry of Agriculture and Rural Affairs.

Impact of different drying parameters on color, β-carotene, antioxidant activity and minerals of apricot (Prunus armeniaca L.).

Apricot is one of the fruits dried by using different methods, such as sun, convective or microwave drying. The effects of drying methods on the components of this fruit differ depending upon the temperature or time parameters. In this research, the impacts of convective, microwave and microwave–convective drying techniques on color, β-carotene, minerals and antioxidant activity of apricots were investigated. The color values (L*, b*,ΔEab, h° and C*ab) of dried fruit were decreased, while the a* values increased. Compared with a fresh sample, the dried apricots showed a 1.4-3.9-fold proportional increase in β-carotene based on the increment of dry matter. The samples dried at high temperature and microwave levels, at 75 °C+90 watt and 75 °C+160 watt, showed lower antioxidant activity. Of the different drying treatments, the microwave-convective method (50 °C+160 watt) obtained a higher β-carotene content while maintaining antioxidant activity with a short drying time.

Development of Value-Added Products from Food Wastes

Waste can contain many reusable substances of high value. Biological wastes contain several reusable substances of high value such as soluble sugars and fiber. Direct disposal of such wastes to soil or landfill causes serious environmental problems. Thus, the development of potential value-added processes for these wastes is highly attractive. In addition, environment-friendly method of waste management is very important for sustainability. In the food processing industries, up to 30 % of incoming raw materials becomes waste rather than a value-added product. Dealing with this waste is an urgent matter for many of these industries as landfill sites close, as operators restrict the amount of waste that can be brought into landfill sites, and as regulations have eliminated some of the previously used disposal practices. Depending on there being an adequate technology this residual matter can be converted into commercial products either as raw material for secondary processes, as operating supplies or as ingredients of new products. Numerous valuable substances in food production are suitable for separation and recycling at the end of their life cycle, even though present separation and recycling processes are not absolutely cost efficient. This chapter considers properties of byproducts and other wastes of various food industries and developed process techniques to obtain value-added products from these byproducts and the wastes.