Yazar "Babapour, Hamid" seçeneğine göre listele

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    Application of Poultry Gelatin to Enhance the Physicochemical, Mechanical, and Rheological Properties of Fish Gelatin as Alternative Mammalian Gelatin Films for Food Packaging
    (Mdpi, 2023) Ashrafi, Azam; Babapour, Hamid; Johari, Simindokht; Alimohammadi, Faezeh; Teymori, Farangis; Nafchi, Abdorreza Mohammadi; Shahrai, Nurul Nuraliya
    This study aimed to describe the properties of cold water fish gelatin (FG) blended with poultry gelatin (PG) for a production of a sachet containing olive oil. To find a desirable film, the different ratio of FG-PG-based films were characterized in terms of mechanical properties. As the proportion of PG in PG-FG-based increased, the tensile strength and Young's modulus were increased, and the elongation at break and heat seal strength of the films were decreased. The 50-50 film had favorable characteristics to use as a sachet. The amount of acid index and peroxide of the oil stored in the sachets after 14 days showed that there is a significant difference (p < 0.05) between the films. The barrier properties of the films including the water vapor permeability and oxygen permeability of films were increased from 1.21 to 4.95 x 10(-11) g m(-1) Pa-1 s(-1) and 48 to 97 cm(3) m mu/m(2) d kPa, respectively. Dark, red, yellow, and opaque films were realized with increasing PG. Fourier transform infrared (FTIR) spectra approved a wide peak of approximately 2500 cm(-1). The rheological analysis indicated that, by adding PG, viscosity, elastic modulus (G ') and loss modulus (G '') were increased significantly (p < 0.05) about 9.5, 9.32 and 18 times, respectively. Therefore, an easy modification of FG with PG will make it suitable for oil sachet packaging applications for the food industry.
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    Optimization of enzyme hydrolysis to improve functional and structural properties of microalgae protein extract
    (Wiley, 2025) Amiri, Motahharesadat; Hassani, Bahram; Babapour, Hamid; Nikmanesh, Ali; Hosseini, Seyed Ebrahim; Asadi, Gholamhassan; Abedinia, Ahmadreza
    This study aimed to optimize the hydrolysis conditions for converting bioactive peptides from the microalgae Scenedesmus obliquus isolated protein (SOIP) using pepsin. The SOIP was first characterized using sodium dodecyl-sulfate polyacrylamide gel electrophoresis (SDS-PAGE) and high-performance liquid chromatography (HPLC) for amino acid profiles. Response surface methodology (RSM) with a central composite design (CCD) was then employed to determine the optimal hydrolysis parameters of enzyme concentration and time for pepsin. Hydrolysates were fractionated based on molecular weight and evaluated for antioxidant, emulsifying, fat binding, and foaming properties. Statistical analysis using RSM showed that both hydrolysis time and enzyme concentration positively influenced the yield of bioactive peptides. Peptides in the 5-10 kDa range demonstrated the highest antioxidant activity, while lower molecular weight peptides (<5 kDa) exhibited superior fat-binding and emulsifying properties. Overall, hydrolysis significantly enhanced the functional properties compared to the unhydrolyzed control. This study demonstrated that Scenedesmus obliquus is a promising source of bioactive peptides and defined optimized conditions for their enzymatic extraction using pepsin.