Producing more food for a growing population in the coming decades, while at the same time combating environmental issues, is a huge challenge faced by the worldwide population. The risks that come with climate change make the mission more daunting. Billion tons of agriculture by-products are produced each year along the agricultural and food processing processes. There is a need to take further actions on exploring the inner potential of agrowaste to stand out as food ingredient to partially or fully substitute the foods in orthodox list. Some of the agro-waste contains the most valuable nutrients in the plant and it is truly a "waste" to dispose any of them. Furthermore, the paper aims at discussing the possible methods of modification to improve the safety and feasibility of the agro-waste either through physical, chemical or microbiological ways. The safety issues and bioactivity contains in the agro-waste also been discussed to present the better overall ideas about the employing of agro-waste in food applications.
The main objective of this study was to evaluate the influence of the different wall material combinations on the microencapsulation of virgin coconut oil (VCO) by spray drying. Maltodextrin (MD) and sodium caseinate (SC) were used as the basic wall materials and mixed with gum Arabic (GA), whey protein concentrate (WPC) and gelatin (G). The stability, viscosity and droplet size of the feed emulsions were measured. MD:SC showed the best encapsulation efficiency (80.51%) and oxidative stability while MD:SC:GA presented the lowest encapsulation efficiency (62.93%) but better oxidative stability than the other two combinations. Microcapsules produced were sphere in shape with no apparent fissures and cracks, low moisture content (2.35–2.85%) and high bulk density (0.23–0.29 g/cm3). All the particles showed relatively low peroxide value (0.34–0.82 meq peroxide/kg of oil) and good oxidative stability during storage. MD:SC:GA microencapsulated VCO had the highest antioxidant activity in both of the 2,2-diphenyl-1-picrylhydrazyl (DPPH) (0.22 mmol butylated hydroxyanisole (BHA)/kg of oil) and 2,2-azinobis (3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) assays (1.35 mmol trolox/kg of oil).
Rice bran oil (RBO) is not a popular oil worldwide, but its demand is increasing due to its popularity as a "healthy oil" in Asian countries, particularly in Japan, Korea, India, China, and Indonesia. RBO is an excellent cooking oil and salad oil due to its high smoke point and delicate flavor. It is unique among edible oils due to its rich source of commercially and nutritionally important phytoceuticals such as oryzanol, lecithin, squalene, phytosterols, polyphenols, tocopherols, tocotrienols, and many more. Many studies on humans and animals have shown that RBO is as effective as some other vegetable oils that are rich in polyunsaturated fatty acids in lowering plasma cholesterol levels and lipoprotein profiles. In some cases, RBO was found to lower plasma cholesterol more effectively, and this effect can be attributed to the occurrence of these other specific components in RBO. This chapter provides a comprehensive review of the phytonutrients from RBO that have shown promising disease-preventing and health-related benefits in experimental research studies.
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