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Showing 4 results for Vardizadeh


Volume 2, Issue 4 (4-2011)
Abstract

The subject of this paper is analyzing the attitudes of political groups within the government, towards the role of people in the political system. Research question is: "How is political culture of the ruling political groups"? Theoretical argument of this paper is related to the political cultures theories. Assumptions of this article were tested through qualitative and quantitative techniques. Experimental results indicated that the attitude of political groups from the first period of presidential elections to the nineth period of the election has changed from task-oriented attitude to right-oriented attitude. After the seventh presidential election, this attitude change was quite tangible. .
Zahra Mousavi, Sedigheh Babaei, Farzaneh Vardizadeh, Mahmoud Naseri,
Volume 8, Issue 4 (Fall 2019)
Abstract

Aims: In this study, gelatin was extracted from Siberian sturgeon waste and used in film making.
Materials and Methods: Gelatin was extracted using NaOH and HCl. After evaluating the extracted gelatin properties (bloom grade, pH, zeta test, melting and setting temperature and time), the edible film was prepared by using glycerol.
Findings: The results showed that the extraction efficiency of the gelatin was %20.06. The protein content, pH, degree of gel hardness, setting and melting temperature and time were 79.2 ± 0.6%, 4, 160.2 ± 0.4 g, 13.1 ± 0.2 ° C in 180.3 ± 0.5 seconds and 19.33 ± 0.5 ° C in 140.66 ± 0.5 seconds, respectively. Zeta potential indicated a positive surface charge in gelatin. The thickness, moisture, solubility, tensile strength, tensile strength and permeability tensile strengths properties of gelatin film reported 0.05 mm, %10.2 ± 1.5, %79 ± 3.7, 30.01 ± 0.7 MPa, %77.5 ± 3.6 and 3.5 ± 0 g mm/h mm2kpa×10-6­, respectively. SEM images of the film showed smooth structure without cracking. Moreover, the FTIR result showed the formation of amide bands in the region of 3277.62, 1633.92, 1530.11 and 1236.49 cm-1.
Conclusion: Due to the efficiency and properties of gelatin, and the mechanical and physical properties of the edible film, it can be used as a good candidate for the production of biodegradable films in food storage.
Farzaneh Vardizadeh, Sedigheh Babaei, Mahmood Naseri, Mohammad-Taghi Golmakani, Mina Esmaeili,
Volume 9, Issue 4 (11-2020)
Abstract

In the present study, the structural and antioxidant properties of fucoidan extracted from macroalgae (Sargassum and Padina) from the Persian Gulf coast were evaluated. The fucoidan was extracted by ethanol and hot water and after calculating the extraction yield, DPPH radical scavenging activity, ferric reducing antioxidant power (FRAP), scanning electron microscopy (SEM), and its monosaccharides by HPLC method were examined. The yield of fucoidan in Sargassum (4.2 ± 0.00%) was higher than Padina (2.98 ± 0.28%) (P < 0.05). The IC50 of DPPH free radical scavenging in fucoidan extracted from Sargassum and Padina were 0.1 and 0.14 mg/ ml, respectively, which were higher than BHT as a commercial antioxidant (P < 0.05). The rate of FRAP in both samples increased with an increase in the concentration of fucoidan. The SEM results showed that fucoidan from both macroalgae had strong structural cohesion and irregular surfaces, but Padina had more surface protrusions. The glucose, mannose and xylose sugars in different amounts were detected by the HPLC method, in which the amount of glucose and xylose sugars were higher in the fucoidan derived-Sargassum (P < 0.05). According to the results of the present study, the fucoidan extracted from the Sargassum and Padina can be a good alternative to an industrial antioxidant in food
Sedigheh Babaei, Farzaneh Vardizadeh, Samaneh Rajabloo, Hamidreza Rashedinia,
Volume 13, Issue 3 (10-2024)
Abstract

In the present study, the fish protein isolate (FPI) of wastes of Siberian sturgeon (Acipenser baerii) has been substituted with fish minced (10, 20, 30, and 40%) in preparing fish nuggets. After preparing fish nuggets (88% Silver carp fillet) and initial cooking, the parameters such as approximate analysis, product yield, weight loss, pick-up, microbial growth, and sensory evaluation were investigated. The results showed that the lowest amount of moisture is related to the IP40 Group and no significant difference exists between other treatments. In comparison, the amount of protein in the control sample was the highest (18.00 ± 0.04) and it was decreased with the increase of FPI substitution (P<0.05). The highest amount of weight loss during final cooking was related to the control and IP10 treatments, and the highest product yield was associated with IP20, IP30, and IP40 treatments (P<0.05). The microbial growth results did not show any significant difference among the treatments (P>0.05). Moreover, the sensory evaluation showed the control group, which was only with fish minced, had better taste, smell, texture, etc. than the treatments containing isolated protein. The results of this research showed that the minced fish of silver carp and the FPI by-product can be used to produce fish nuggets, and although in some physical properties, the nuggets containing higher amounts of isolated protein have shown better results, according to the amount of protein and sensory evaluation, the control and the sample containing %10 FPI had better results.


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