Showing 4 results for Antioxidant
Aniseh Jamshidi, Bahareh Shabanpour, Parastoo Pourashouri, Mojtaba Raeisi,
Volume 6, Issue 3 (9-2018)
Abstract
Background and Objectives: Production of fish protein hydrolysate is a method for converting the low-value economical underutilized fish species to value-added products. This study aimed to evaluate the different proportions of distilled water to the substrate on the functional characteristics, antioxidant and nutritional quality of fish protein hydrolysate of bigeye ilisha (Ilisha megaloptera) produced by enzymatic hydrolysis.
Materials and Methods: After defatting of minced fish, the hydrolysis process was carried out using three different 4:1, 5:1 and 6:1 distilled water to substrate proportions by using alcalase enzyme in three replications. The protein hydrolysate samples were analyzed for approximate composition (soluble protein, moisture, fat and ash), functional characteristics (solubility, foam capacity, and foam stability), antioxidant properties (DPPH radical scavenging activity and reducing power) and mineral composition.
Results: In this study, the ratio of distilled water to the substrate affected the protein hydrolysate properties and the highest amounts of hydrolysis degree and DPPH radical scavenging activity were observed in samples with 5:1 ratio. Fish protein hydrolysate obtained from 4:1 ratio had the highest amount of soluble protein, and no significant difference was observed in term of solubility with samples obtained by 5:1 ratio. Moreover, there were no significant differences in terms of lightness and foam capacity of samples obtained from 4:1 and 6:1 proportions.
Conclusion: According to the results of the study, using a 4:1 ratio of distilled water to substrate led to the production of fish protein hydrolysates from bigeye ilisha with higher functional properties and nutritional composition.
Mahmoud Heidari, Fereshteh Dardmeh, Hiva Alipour, Nasrinsadat Azami ,
Volume 11, Issue 2 (10-2023)
Abstract
Background: Semen quality and related parameters correlate directly with fertilization, consequently assisting reproductive technology outcomes. Traditional studies on carob (Ceratonia siliqua) have demonstrated its effect on male fertility potential via the reductive effect on reactive oxygen species. This study aimed to investigate the effect of carob kibble extract on sperm motility.
Methods: The extract was made using acetone as a solvent, followed by vacuum evaporation and filtration. Following thawing, each of the forty human semen samples was divided into four groups and exposed to concentrations of 0.0 (control), 0.05, 0.2, and 0.8 mg/ml of the extract. Percentages of progressive motile, non-progressive motile, and immotile sperms, as well as other kinematic parameters, were assessed by computer-aided sperm analysis immediately after exposure to the concentrations (T0) and one hour later (T1). Data were analyzed by repeated measure analysis of variance and paired sample t-student tests using SPSS software. The level of p< 0.05 was considered statistically significant.
Results: No significant difference was found between groups at T0 or T1 values. However, a comparison of matched doses at T0 and T1 indicated that lower doses 0.05 and 0.2 mg/ml could significantly (p<0.05) inhibit natural decline in motility.
Conclusion: Adding lower doses of carob kibble extract on a thawing medium could have a supportive effect on sperm motility. However, adding the extract to a vitrification solution before a freezing process, as well as oral intake of the extract seems to have more efficiency than would be a subject for further studies.
Keywords: Carob, Kinematic parameters, Frozen sperm, Antioxidant
Mehdi Dehghani Kazemi, Zahra Ebrahimnezhad, Hamid Beyzaei,
Volume 11, Issue 2 (10-2023)
Abstract
Background: Anabasis setifera and Caroxylon imbricatum are two halophytic and xerophytic plant species belonging to the family Chenopoodiaceae s.str., that are distributed widely in dry environments of the Old World. This study investigated the antioxidant and antibacterial properties of the hydroethanolic extracts of fruit-bearing branches of these species collected from Zabol in the east of Iran.
Methods: The antimicrobial effect was essayed using broth microdilution and streak plate protocols against nine pathogenic microorganisms from different genera, including Klebsiella, Pseudomonas, Escherichia, Bacillus, Staphylococcus, Streptococcus, Aspergillus, Fusarium and Candida. The antioxidant activity was measured by the DPPH free radical scavenging method.
Results: Extracts were effective on all tested bacterial and fungal strains except for Candida albicans, which Caroxylon imbricatum didn’t affect. The MIC values ranged from 8 to 2048 μg/ml. The IC50 values of 76.40 and 154.05 μg/ml were observed with Anabasis setifera and Caroxylon imbricatum extracts, respectively.
Conclusion: These plant species can efficiently treat infectious and oxidative stress-related diseases due to their broad spectrum antimicrobial properties and acceptable antioxidant activities.
Azar Mohammadi, Abdolhossein Taheri Kalani, Mahnaz Omidi,
Volume 12, Issue 1 (10-2024)
Abstract
Background: When metabolic demands increase due to an obesity-induced high-fat diet (HFD), mitochondrial function is impaired, production can increase, and oxidative stress occurs. This type of stress has been shown to play a key role in various pathological conditions such as heart disease, hypertension, diabetes, chronic kidney disease, and cancers. This study aims to evaluate the impact of HFD and resistance training (RT) on oxidative stress biomarkers and cardiac health in rats.
Methods: In this experimental study, 21 male Wistar rats (weighing 200-300 g) were randomly and equally assigned into the following groups: control (CTRL), HFD, and HFD+ RT. Animals in the HFD groups received a high-fat diet for 23 weeks. During the treatments, rats in the HFD+ RT group, besides receiving a high-fat diet, performed the progressive RT protocol three times per week with 30- 100% of their body mass in the last eight weeks. At the end of the treatments, superoxide dismutase (SOD), glutathione peroxidase (GPX), total antioxidant capacity (TAC), and malondialdehyde (MDA) levels in cardiac tissue were measured by colorimetric method. The data were analyzed by one-way analysis of variance (ANOVA) and Tukey’s post hoc test at a significant level of P<0.05.
Results: HFD did not alter levels of SOD, GPX, TAC, or MDA in cardiac tissue. Cardiac SOD (P=0.021), GPX (P=0.024), and TAC (P=0.041) levels in the HFD+ RT increased significantly compared to the HFD group, but there was no significant difference in cardiac MDA levels between the three groups (P=0.438).
Conclusion: RT seems to improve cardiac tissue oxidative stress adaptations in an animal model fed with an HFD.
