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Showing 3 results for Soleimanian-Zad


Volume 18, Issue 5 (9-2016)
Abstract

Aflatoxins are potent carcinogenic and immunosuppressive agents. Acute exposure to high level of aflatoxins leads to aflatoxicosis, which cause rapid death due to liver failure. Immune modulating effects of probiotic bacteria have good prospects to detoxification of natural foods. This study was aimed to investigate the ability of Lactobacillus acidophilus strainLA-5 in the presence and absence of yoghurt starter culture for removing Aflatoxin M1 (AFM1) in comparison with yoghurt starter cultures (108 CFU ml-1). AFM1 detoxification was evaluated for 21 days of yoghurt storage at 4°C at different concentrations of Aflatoxin (0.1, 0.5 and 0.75 µg L-1). The amounts of unbound AFM1 were determined using competitive Enzyme-Linked Immunosorbent Assay (ELISA). L. acidophilus combined with yoghurt starter culture and alone could significantly (P≤ 0.05) remove AFM1 compared to control group. The results indicated that increasing initial AFM1 concentration in the yoghurt samples and storage time affected the capacity of AFM1 binding.

Volume 20, Issue 1 (1-2018)
Abstract

Given the growing interest in the production of new and low cost bioemulsifiers, the rice and wheat bran and straw were investigated in this study for the production of bioemulsifier by Lactobacillus plantarum subsp. plantarum PTCC 1896 (probiotic). The strain produced bioemulsifier only in the rice bran hydrolysate medium. The bioemulsifier amount reached around 0.7 g L-1 for 72 hours of fermentation. The new biomolecule was extracted, purified, and its structural and thermal properties were evaluated. The functional groups and the structure of the molecule were revealed by GPC, FT-IR, 1HNMR and 13CNMR techniques. The bioemulsifier was a water soluble extracellular high molecular weight (>107 Da) α-glucan (81.74%) bound with protein (18.18%). Thermal behavior was studied using DSC and TG analysis. Thermal analysis showed the bioemulsifier broke down above 211.74°C, and the melting point was 182.0°C with the enthalpy value of 101.7 J g-1. These results might provide incentives for the industrial production of the biodegradable and safe bioemulsifier introduced in this study, which seems to offer potential applications in the food and medical industries.

Volume 21, Issue 2 (3-2019)
Abstract

 Byssochlamys fulva is a heat-resistant fungus whose growth causes significant economic losses since it is mostly implicated in the spoilage of processed fruits (e.g., apple juice). Essential oils have received an increasing attention for use in food products to prevent mold growths. In this study, the ultrasonic emulsification method was employed to prepare Zataria multiflora Boiss. Essential Oil (ZEO) and Carum copticum L. Essential Oil )CEO) based NanoEmulsions (NEs) separately using a mixture of components including Z. multiflora and C. copticum oils, each as an organic phase, as well as the surfactant Tween 80 at a ratio of 1:4 v/v. The Z. multiflora NanoEmulsion (ZEO-NE) formulated with a droplet diameter of 19.42±1.66 nm and a PolyDispersity Index (PDI) of 0.377 and the Carum copticum NanoEmulsion (CEO-NE) with a droplet diameter of 15.13±0.56 nm and a PDI of 0.253 was found to remain stable for more than 9 months at 25 °C. The in vitro evaluation revealed that the the ZEO-NE at a concentration of 5 μL mL-1 and CEO-NE at 25 μL mL-1 gave rise to inhibition effects of 84.23±0.006% (P< 0.05) and 86%±0.012 (P< 0.05) against B. fulva, respectively. The in situ assessment of the nanoemulsions in apple juice revealed a significant (P< 0.05) reduction in the inoculated fungal population. Results indicate that the ZEO-NE and CEO-NE can be used as antifungal compounds in beverages.
 

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