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Summary: The present study aims to provide an overview of the impact of brown rice protein (BRP) conjugated with microcrystalline cellulose via the Maillard reaction on characteristic features of yoghurt and the bioaccessibility of essential minerals in this dairy product. The confirmation of conjugation was conducted using FTIR spectroscopy. Adding BRP or Maillard conjugate (MC) proved beneficial in enhancing the water‐holding capacity and decreasing the syneresis of samples. Additionally, yoghurt (MCY) containing the Maillard conjugate demonstrated superior performance in these properties. A lower number of pores and a stronger gel network (structural integrity) were identified in MCY compared to the other samples (BRPY: yoghurt containing BRP and PY: plain yoghurt). On the other hand, in general, supplementation of BRP and MC led to slight alteration in the concentration of aroma compounds. Similarly, the impact of BRP and MC on changes in the molecular weight distribution of proteins during in vitro gastrointestinal digestion was negligible. Bioaccessibility values of Ca and Mg in PY were 53.72% and 10.72%, respectively. The improvement in these values was observed in BRPY (Ca: 57.33% and Mg: 15.60%). Moreover, adding MC to yoghurt led to a tighter interface structure (indicating rigid gel), which allowed more minerals to bind, increasing mineral bioaccessibility (Ca: 64.40% and Mg: 31.14%). A higher general acceptability in sensory evaluation was scored for PY followed by MCY and BRPY. Ultimately, the positive effect of ingredients (especially MC) on yoghurt quality was obvious. [ABSTRACT FROM AUTHOR]

In this study, the simultaneous systematic approach of pH and ultrasound for protein extraction from chickpea was optimized by response surface methodology (RSM). The effect of extraction time, ultrasonic device amplitude, and solvent pH on protein powder yield was evaluated in the protein extraction step. The optimum extraction conditions (protein powder yield: 9.55%) were determined as extraction time 42.41 min, amplitude 61.39% and pH: 8.38. The characteristic structure of chickpea protein powder was confirmed by Fourier transform infrared spectroscopy (FTIR). Techno-functional properties of the final powder were investigated. Water holding capacity (WHC) of protein was 240.24%, fat binding capacity (FBC) was 213.68%, foaming capacity was 37.50%, foam stability (10-30 min) was 73.33-60.00%. Emulsion properties including emulsion activity index (EAI) and emulsion stability index (ESI) (10-30 min), stability coefficient (R) and centrifugal precipitation rate (CPR) were 15.36 m²/g, 62.24-181.30, 0.68 and 14.60%, respectively. In conclusion, the simultaneous application of ultrasound and pH can be an innovative and promote method for the extraction of proteins from raw materials. [ABSTRACT FROM AUTHOR]

This study covered the phenolic compounds extraction from tomato peels using microwave assisted extraction (MAE) system and their microencapsulation by spray drying technique. For this purpose, MAE conditions (microwave power: 250-500 W and extraction time: 1-60 min) for maximum recovery were optimized by response surface methodology. The highest values for total phenolic content (TPC) (3.58 mg GAE/g) and antioxidant capacity (29.85 mmol TE/g) were obtained at the point where the microwave power was 310 W and the extraction time was 35 min. Phenolic extracts produced under optimum conditions were mixed with maltodextrin (the ratio of soluble solids in the extracts to maltodextrin: 1/1 w/w) and converted into powder form using spray drying technique. The success of the microencapsulation process was confirmed by fourier transform infrared spectroscopy (FTIR). Powder yield, moisture content, water activity and solubility values for microcapsules were determined as 63.45%, 4.18, 0.19 and 92.34%, respectively. The antioxidant capacity of the final powder products was investigated by TFM (3.17 mg GAE/g), DPPH (23.10 mmol TE/g), ABTS (75.83 mmol TE/g) and FRAP (13.95 mmol TE/g) methods. The results show that it is not a reasonable approach to dispose of waste materials or use them in field with low economic value. On the contrary, they have the potential to transform value-added products. [ABSTRACT FROM AUTHOR]

The current study focused on characteristic attributes of protein concentrate obtained from oil-free cottonseed. For this, the physicochemical properties namely moisture content, water activity, color, flowability, wettability, and protein solubility of cottonseed protein concentrate (CSPC) were investigated. Water holding capacity (WHC), oil binding capacity (OBC), foaming capacity, foam stability (10 and 30 min), emulsion activity index (EAI) and emulsion stability index (ESI) (10 and 30 min) of proteins were 2.75 g water/g protein, 2.59 g oil/g protein, 29.00%, 93.10% - 69.05%, 6.25 m²/g and 29.27-87.81 min, respectively. Bands regarding CSPC in the 45 kDa molecular weight were detected by sodium dodecyl-sulfate polyacrylamide gel electrophoresis (SDS-PAGE) patterns. Fourier-transform infrared spectroscopy (FTIR) was used to verify the protein-specific structures. Sheet structures in the surface morphology of CSPC were dominant when scanning electron microscopy (SEM) images were investigated. Thermal gravimetric analyzer (TGA) results showed that the protein concentrate exhibited excellent stability to temperature. [ABSTRACT FROM AUTHOR]