Showing 3 results for Emtiazjoo
Volume 12, Issue 2 (6-2009)
Abstract
Objective: Sea cucumber is a traditional food and medical item and has been reported to exhibit Antioxidant, antifungal, anti tumoral and antibacterial bioactivity. The objective of this study is to describe the antibacterial activity of 4 extracts of Holoturia. Sp (sea cucumber), collected from Hengam Island of Persian Gulf.
Materials and Methods: Methanol, hexane, aqueous and chloroform extracts from body wall tissue of the sea cucumber were screened for antibacterial activity against three strains of Escherichia coli Top 10 F´, TG1 and K12 using disc diffusion and broth microdilution tests methods.
Result: The growth of all these strains were inhibited using concentration from 0.78 to 100 mg/ml of methanol, hexan and chloroform extracts. Among the extracts just methanol and chloroform with 100 mg/ml had bactericidal effect on TG1 and K12 strains. On the other hand, Aqueous extract had induced growth in of the all strains.
Conclusion: The results suggest the possibility of applying sea cucumber as source of potential anti bacterial agents, whose compounds can be good candidates to make antibiotic products.
Volume 16, Issue 90 (August 2019)
Abstract
The aim of this study was to investigate the effect of Dunaliella salina addition in concentrations of 0.1, 0.25, 0.5, 0.75, 1 and 1.5% as substitutes for 6.7, 16.7, 33.4, 50, 66.7 and 100% stabilizers on the rheological, physicochemical and sensory properties of the ice cream samples. All samples showed a shear-thinning behavior. Dunaliella salina addition increased significantly the apparent viscosity and decreased melting rate (P<0.05). Also, the addition of Dunaliella salina increased significantly in the overrun and decreased the hardness of the samples (P<0.05). The sensory evaluation suggests that the addition of Dunaliella salina does not have a significant effect on odor and flavor. Samples containing the highest percentage of Dunaliella salina were received the highest color, appearance and hardness scores by panelists. In general, samples containing a high percentage of Dunaliella salina were selected as the best overall acceptance by panelists. As a general result, according to the results of this study, the addition of Dunaliella salina to ice-cream, while improving the qualitative characteristics of the product, also improves its sensory properties and improves the acceptance of the product.
Volume 20, Issue 142 (December 2023)
Abstract
In this study, an optimal pH-sensitive intelligent film based on starch at the level of 1% w/v containing 0.1% potato starch nanocrystals and anthocyanin extracted from the Dutch rose plant (Rosa hybrida) at the level of 0.5% w/v was designed and used to determine the spoilage of chicken fillet at refrigerator temperature during 12 days of storage. The index of volatile nitrogen bases ¹ and thiobarbituric acid ² of chicken samples increased significantly during 12 days.
The results showed that the inoculation of the extract in the biofilm changed the total population of bacteria and psychrophilic bacteria in chicken fillets to below detectable levels within 8 and 12 days, respectively. The present study showed that the color change of the smart film at the end of the storage day corresponds to the microbial growth pattern and also the increase in TBA, TVB-N and pH, which is caused by the production of nitrogenous substances and alkaline compounds by mesophilic and psychrophilic bacteria.
Therefore, the film of potato starch nanocrystals/potato starch containing Dutch rose extract can be used as an indicator of the freshness of meat fillet.
