In this chapter, we discuss the influence of the processing methods on the content of phenolic compounds in fruits and vegetables. The intake of fruits and vegetables based‐foods are associated with delayed aging and a decreased risk of chronic disease development. Fruits and vegetables can be consumed in natura, but the highest amounts are ingested after some processing methods, such as cooking procedures or sanitizing methods. These methods are directly methods are directly related to alteration on the phenolic content. In addition, the postharvest conditions may modify several phytochemical substances. Phenolic compounds are referred to as phytochemicals found in a large number of foods and beverages. The relative high diversity of these molecules produced by plants must be taken into account when methods of preparation are employed to obtain industrial or homemade products. Phenolic compounds comprise one (phenolic acids) or more (polyphenols) aromatic rings with attached hydroxyl groups in their structures. Their antioxidant capacities are related to these hydroxyl groups and phenolic rings. Despite the antioxidant activity, they have many other beneficial effects on human health. However, before attributing health benefits to these compounds, absorption, distribution, and metabolism of each phenolic compound in the body are important points that should be considered.

/pdf/phenolic-compounds-functional-properties-impact-of-1spi4pmexp.pdf

Phenolic Compounds: Functional Properties, Impact of Processing and Bioavailability

The potato (Solanum tuberosum L.) is a tuber that is largely used for food and is a source of different bioactive compounds such as starch, dietary fiber, amino acids, minerals, vitamins, and phenolic compounds. Phenolic compounds are synthetized by the potato plant as a protection response from bacteria, fungi, viruses, and insects. Several works showed that these potato compounds exhibited health-promoting effects in humans. However, the use of the potato in the food industry submits this vegetable to different processes that can alter the phenolic content. Moreover, many of these compounds with high bioactivity are located in the potato's skin, and so are eliminated as waste. In this review the most recent articles dealing with phenolic compounds in the potato and potato byproducts, along with the effects of harvesting, post-harvest, and technological processes, have been reviewed. Briefly, the phenolic composition, main extraction, and determination methods have been described. In addition, the "alternative" food uses and healthy properties of potato phenolic compounds have been addressed.

/pdf/phenolic-compounds-in-the-potato-and-its-byproducts-an-211w42ukgy.pdf

Phenolic Compounds in the Potato and Its Byproducts: An Overview

Progress of potato staple food research and industry development in China

https://biblio.ugent.be/publication/8702100/file/8703895.pdf

Modification approaches of plant-based proteins to improve their techno-functionality and use in food products

Health benefits of the potato affected by domestic cooking: A review

Content of polyphenols in coloured and yellow flashed potatoes during dices processing

The development of functional corn snacks by adding nutritional rich additives is an interesting strategy to promote the consumption of antioxidant rich ingredients, such as polyphenols. Flours made from Jerusalem artichoke tubers, amaranth seeds, and pumpkin flesh were added at level of 10% to corn grits in twin-screw extrusion at the head zone temperatures of 120, 140, or 160 °C and two levels of screw rotation speed (200 and 300 rpm). The use of amaranth seeds flour and in a lower degree of Jerusalem artichoke flour is recommended. Amaranth flour did not change significantly sensory attributes (especially the appearance and texture) of regular corn snacks and significantly increased the total polyphenols content, TPC up to 3449 mg 100 g −1 dry matter (dm), particularly when extruded at a temperature of 160 °C and a screw rotation speed of 300 rpm. The effects of Jerusalem artichoke and pumpkin on the structure of the corn snacks were so negative that preclude their used in this industrial application, even though drastic increases in the antioxidant capacity and TPC were observed.

Joanna Miedzianka

Papers

Content of polyphenols in coloured and yellow flashed potatoes during dices processing

Sensory attributes and physicochemical features of corn snacks as affected by different flour types and extrusion conditions

Properties of acetylated potato protein preparations

Effect of pH on phosphorylation of potato protein isolate.

Improving the properties of fodder potato protein concentrate by enzymatic hydrolysis.