Stability of spray-dried beetroot extract using oligosaccharides and whey proteins

Abstract

The properties and stability of spray-dried beetroot extract using maltodextrin (MD), inulin (IN), and whey protein isolate (WPI) as carrier agents were evaluated. The values of moisture, betalains content, and retention were 3.33-4.24%, 348.79-385.47 mg/100 g (dry-basis), and 88.45-95.69%, respectively. Higher values of antioxidant activity were observed for the treatments using WPI. The treatment with inulin alone presented higher hygroscopicity in the moisture adsorption isotherms at 25 °C and lower thermal stability when evaluating the thermogravimetric curves. When stored at 60 °C, the use of WPI alone conferred lower stability to the beetroot extract powder. In general, the simultaneous use of IN and WPI as carrier agents resulted in good stability of the beetroot extract powder, representing an opportunity for innovation in food products.

The Influence of Inulin on the Retention of Polyphenolic Compounds during the Drying of Blackcurrant Juice

“…Further handling of juice, including drying, can modify the composition and the quantity of polyphenols as a result of different factors, such as the initial composition of the juice, the applied drying processes and parameters, the added carrier and its concentration, and, most importantly, the interactions between the bioactive compounds themselves and between the bioactives and the carriers [16,25,26,27]. In the current study, carriers were chosen based on popularity (maltodextrin) and functionality (inulin), and their mixtures were supposed to improve the drying properties of inulin [28]. The concentration of the carriers was chosen based on a preliminary experiment designed to select carrier concentrations that can be used to produce fine powders by all drying methods applied in study.…”

Optimisation of Beetroot Juice Encapsulation by Freeze-Drying

“…It is generally known that the DPPH radical scavenging activity of food is closely related to the content of bioactive compounds, such as phenolics and betalains, which are present in OE. Spray-dried beetroot extract powders obtained with whey proteins and their mixtures with inulin or maltodextrin exhibited higher antioxidant activities than the inulin-and/or maltodextrin-based powders [do Carmo et al, 2018]. Authors suggest that in the case of protein-based encapsulates, antioxidant activity could be attributed not only to the bioactive compounds from beetroot extract but also to Maillard reactions occurring between sugars from beetroot extract and whey proteins.…”

“…Water is an important basic element in food. OE had a low moisture content (2.61%), which corresponds to the powdered product of good stability, effective packaging and storage [do Carmo et al, 2018;Sinija et al, 2007]. Higher moisture content in products enables microbial growth and caking [do Carmo et al, 2018].…”

“…OE had a low moisture content (2.61%), which corresponds to the powdered product of good stability, effective packaging and storage [do Carmo et al, 2018;Sinija et al, 2007]. Higher moisture content in products enables microbial growth and caking [do Carmo et al, 2018]. In the study of do Carmo et al [2018], beetroot extract encapsulated in whey protein isolate alone and mixtures with maltodextrin and inulin presented higher moisture values (3.81-4.24%) than the powders obtained with maltodextrin and/or inulin (3.33-3.58%) because of the greater ability of proteins to maintain moisture trapped in the particles [Jayasundera et al, 2009].…”

Cryogels from albumin and low methoxyl amidated pectin as a matrix for betalain encapsulation

“…During this process, a polymeric network or wall material is formed that can protect the biocompounds against the effects of external factors such as pH, temperature, light, oxygen, and water activity, thus simplifying their handling while simultaneously increasing their stability during storage (Chhikara, Kushwaha, Sharma, Gat, & Panghal, 2019; Comunian & Favaro‐Trindade, 2016; Janiszewska, 2014). Spray drying has been the most commonly used technology for the protection of bioactive compounds (Neves, Desobry‐Banon, Perrone, Desobry, & Petit, 2019; Pasrija, Ezhilarasi, Indrani, & Anandharamakrishnan, 2015; Rocha et al., 2019); for example, spray drying has been used for the encapsulation of betalain extracted from beetroot ( Beta vulgaris ; Do Carmo et al, 2018; Pitalua, Jimenez, Vernon‐Carter, & Beristain, 2010) and from cactus pear ( Opuntia ficus‐indica ; Otálora, Carriazo, Iturriaga, Nazareno, & Osorio, 2015; Robert, Torres, García, Vergara, & Sáenz, 2015). Recently, biopolymer‐derived hydrogels have been attracting increasing attention as potential matrices for the encapsulation of bioactive compounds, as they are biodegradable and biocompatible (Abaee, Mohammadian, & Jafari, 2017; Belščak‐Cvitanović et al., 2015; Caló & Khutoryanskiy, 2014; Farjami, Madadlou, & Labbafi, 2015).…”