Milk protein concentrates 80: Does composition of buffalo milk matter for its poor functionality?. (September 2020)

• Record Type: Journal Article
• Authors: Mahadev, Giri Minanath; Meena, Ganga Sahay
• Is Part Of: Lebensmittel-Wissenschaft + Technologie =. Volume 131(2020)
• Publication Date: 2020-09
• Subjects: High-protein powder -- Buffalo milk -- Characterization -- Functionality -- Microstructure; Food industry and trade -- Periodicals; Food -- Composition -- Periodicals; Microbiology -- Periodicals; Nutrition -- Periodicals; 664.005
• DOI: 10.1016/j.lwt.2020.109652
• Languages: English
• ISSNs: 0023-6438

Abstract

Abstract: Poor solubility is the major problem in high-protein milk protein concentrates (MPC). Therefore, present investigation aimed at producing and characterizing buffalo milk-based milk protein concentrate 80 (BM-MPC80) for its physicochemical, functional and reconstitution properties; morphological characteristics and rheological behaviour. The UF concentrate (0.80 protein to total solids ratio) obtained through ultrafiltration (UF) of pasteurized buffalo skim milk was spray-dried at 200/95 ± 5 °C to obtain BM-MPC80 powder. It was observed that solubility (24.40 ± 0.84%), heat stability (1.00 ± 0.00 min), porosity (34.90 ± 1.20%), dispersibility (7.43 ± 0.26%), specific surface area (36.60 ± 1.59 m 2 /kg) and flowability (43.56 ± 1.69°) values of BM-MPC80 powder were lower than counterpart. Its particle density, dispersion index, wettability, water activity, apparent viscosity (at 20 °C, 50 s −1 ), foam capacity and stability values were 0.56 ± 0.02 g/mL, 1.20 ± 0.89%, 6.33 ± 0.32s, 0.12 ± 0.00, 0.455 ± 0.00Pas, 36.27 ± 1.56%, and 70.53 ± 1.34%, respectively. Scanning electron micrographs revealed extensive aggregation in BM-MPC80 powder particles, which could be responsible for its poor solubility and dispersibility. Shear-thinning behaviour was observed in UF concentrate and reconstituted BM-MPC80 solution. Overall, this study established that composition of buffalo milk is responsible for poor functional and reconstitution properties of BM-MPC80 powder. Highlights: BM-MPC80 was characterized for physicochemical, reconstitution & functional properties. BM-MPC80 had inferior solubility, heat stability, dispersibility, flowability & porosity. BM-MPC80 had better wettability and higher apparent viscosity. SEM micrograph exhibited severe particle aggregation in BM-MPC80 powder.