The present study reports the physicochemical, textural profile, microbial, antioxidant, and sensory characteristics of the produced yoghurt containing Aloe vera foliar gel. The result showed that syneresis was increased gradually with increase in Aloe vera foliar gel concentration during storage period. Aloe vera leaf gel had a negative effect on L. Acidophilus and B. lactis Bb‐12, but the viable cells were in the acceptable range according to FAO (106−107 CFU g−1). The flow behavior for all yoghurt samples was found the shear thinning behavior and after fitting with three models, it followed the Herschel–Bulkley model. The presence of Aloe vera gel in yoghurts had a negative impact on the textural properties and this effect was significant except for springiness and resilience. Our results confirm improvability and meaningfulness the antioxidant effects of yoghurt enriched with Aloe vera foliar gel by FRAP assay.
Practical application
The present study reports the physicochemical (pH, acidity, syneresis, viscosity, and flow behavior), textural profile (hardness, adhesiveness, cohesiveness, gumminess, chewiness, springiness, and resilience), microbial, antioxidant and sensory characteristics of the produced yoghurt from the Aloe Vera foliar gel. Produced yoghurts could be introduced as a good vehicle for probiotic bacteria and so, produced yoghurts from Aloe vera foliar gel have a good potential for commercial exploitation.
In this study, effect of Qodume shahri (Lepidium perfoliatum) and cress (Lepidium sativum) on rheological properties of ice cream were investigated. The gums were added to the ice cream formulation and different quality attributes including pH, acidity, melting characteristics, viscosity, overrun, texture analysis and sensory evaluation were determined. Results showed that ice cream formulations containing both the gums had improved overrun, melting rate, first dripping time, viscosity, hardness and adhesiveness. The gum concentrations beyond 0.2% level led to a negative effect on gumminess and chewiness of ice cream. Both the gums addition to improved quality attributes and textural properties of ice cream.
In this research, maltodextrin (0, 1 and 2% w/w) and resistant starch (0, 1 and 2% w/w) were used in the formulation of low-fat ice cream (4% fat) and their effects on the physicochemical and sensory properties were investigated. The optimum levels of maltodextrin and resistant starch were determined by response surface methodology. Increment of maltodextrin and resistant starch increased acidity, viscosity, melting rate, time of dripping and overrun but decreased melting rate of ice cream. Results showed that the incorporation of maltodextrin and resistant starch at 0 and 2% w/w respectively, resulted into ice cream with suitable viscosity, melting rate, first dripping time, overrun and acidity.
In this study, the effect of different concentrations (0.2%, 0.1%, and 0%) of some plant seed gums (Qodume Shahri (Lepidium perfoliatum) and cress (Lepidium sativum)) as the stabilizer on the flow behavior, textural, and sensory properties of frozen yoghurt produced from camel and cow's milk was investigated. The results showed that plant seed gums significantly affected the viscosity, overrun and melting rate, textural, and sensory properties of frozen yoghurt samples prepared from camel and cow's milk. Also, no significant differences were observed in pH and acidity of the samples. The highest overrun value was observed in the control sample. Frozen yoghurt containing 0.2% Qodume Shahri seed gum (QSSG) had the highest viscosity and the longest first dripping time. This is an indication that frozen yoghurt mixes are non‐Newtonian at all added concentrations. Finally, Herschel–Bulkley model well described the rheological behavior of frozen yoghurt mixtures due to the higher correlation coefficient. In general, cow's frozen yoghurts containing 0.2% cress seed gum (CSG) and 0.1% QSSG were more acceptable among panelists than camel frozen yoghurt sample.
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