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Showing 4 results for Fatan
Effect of Molecular Weight of Isolated Protein Hydrolysate from Sardinella sindensis Obtained Using Pancratin on the Anti-Oxidative and Anti-Diabetic Properties
B. Fatan, H. Ahmadi Gavlighi, M.a. Sahari,
Volume 8, Issue 2 (Spring 2019)
Abstract
Aims: The purpose of the present study was to hydrolyze Sardinella sindensis protein isolate by pancreatin enzyme and then fractionation hydrolysate based on molecular weight and finally evaluating and comparing the anti-oxidative and anti-diabetic properties of the fractions with hydrolysate.
Materials & Methods: Protein isolate from Sardinella sindensis muscle was extracted and then hydrolyzed using pancreatin enzyme in two enzyme/substrate ratio of 2.5 and 5% (W/W) for 2h. The hydrolysates were fractionated into three fractions included FPH-I (<2kDa), FPH-II (2-10kDa) and FPH-III (>10kDa) using an ultrafiltration (UF) membranes. The antioxidant and anti-diabetic activiteis of the fractions and hydrolysate were investigated.
Findings: The degree of hydrolysis increased with increasing hydrolysis time and it was significant between 30 and 60 minutes (p<0.05). FPH-III showed the highest DPPH radical scavenging activity. In terms of chelating activity on Fe2+, there was no significant difference between the fractions and hydrolysate (p>0.05). Also, FPH-III showed a better ABTS radical-scavenging activity. FPH-III had the highest inhibitory potential against α-amylase at 2.5%. In addition, the inhibitory effect of samples at 20mg/ml against α-glucosidase was less than 50%.
Conclusion: FPH-III from Sardinella sindensis protein isolate by pancreatin enzyme had the highest DPPH radical scavenging, ABTS+ activity and alpha-amylase inhibitory.
 

Comparison of the Efficiency of Iron-Magnetic Nanoparticles with CTAB and Rapid Detection Methods for DNA Extraction of Rose petal (Rosa hybrida L. cv. Vendetta)

Volume 10, Issue 4 (Fall 2019)
Abstract
The high quality and quantity of extracted DNA is necessary for a variety of molecular biology studies. Low yields and poor quality of genomic DNA extracted from petal due to high levels of secondary metabolites. Carotenoids, anthocyanins, phenolic acids and flavonoids are the most effective secondary metabolites in petals, which are considered as contaminating compounds and could lead to interfere with DNA during extraction and purification. Considering that the basis of the most molecular research in genetic engineering and genomics is high-quality of DNA, therefore, it seems that finding an efficient method for reducing adverse effects of these contaminating compounds for the exteraction is essential. In this regard, iron-magnetic nanoparticles have been used to improve the exteraction of high yields and quality of DNA from rose petals in the present work. In the following, to compare the efficiency of DNA extraction, modified CTAB (Cetyl Trimethyl Ammonium Bromide) and rapid detection methods were used. The results showed that petal’s extracted DNA quantification and qualification by iron-magnetic nanoparticles procedure was much more reliable than two other methods. Inaddition, this method could extract optimal amount of DNA with the lowest amounts of samples within few minutes. Due to high qualification and quantification of DNA purification by iron-magnetic nanoparticles, the present procedure could be recommended as an efficient protocol for rose petal DNA extraction.

Investigation of the effect of combined treatment of clove plant essential oil (Syzygium aromaticum) with carboxymethylcellulose on storage of fresh pistachio

Volume 18, Issue 111 (May 2021)
Abstract 
Nutritional value, deliciousness and ease of digestion, high calories, suitable vitamins and minerals are some of the qualities that make pistachios superior to other kernels and are often consumed dry. Fresh pistachio does not have long shelf life despite its higher nutritional value, therefore, studying the methods of increasing the storage of fresh pistachios for the market is one of the aims of this product. In this regard, a study was carried out to investigate the effect of combined treatment of carboxymethyl cellulose (CMC) with different concentrations of two essential oils of clove and on the storage life of pistachio cultivar, Ahmad Aghaei. In this study, factorial experiments were conducted in a completely randomized design. In this experiment the treatments were in two levels, one concentration of control edible (distilled water), 0.5% CMC, 0.5% CMC +400 mg clove, 0.5% CMC +800 mg clove + 0.5 0% CMC +1200 mg clove and second factor of storage period were studied at two levels (25 and 50 days). The results showed that with increasing storage time, skin and kernal firmness decreased in all treatments. The percentages of weight loss, chroma index, malondialdehyde, hydrogen peroxide increased during storage. The application of carboxymethyl cellulose alone and with the essential oils of cloves compared to the distilled water application improved most of the factors studied. The combined treatments were able to maintain fruit firmness compared control sample and were unable to maintain the amount of phenolic compounds, total chlorophyll of kernal, and kernal carotenoids during storage. Overall, the combination of carboxymethyl cellulose with 400 mg / L of clove essential oil were able to retain most of Ahmadaghaiechr('39')s pistachio quantitative and qualitative characteristics for up to 50 days.

Rationality vis-à-vis Relativity: Accounted for Imagination and ‘the Permanent’ in Farabi’s Philosophy

Volume 30, Issue 3 (6-2023)
Abstract
Rationality or relativity? In which one does Farabi believe? How does it relate to imagination and the permanent, if at all? For Farabi, people come to grasp rational truths mostly through the use of their imagination. Furthermore, the arousal of people’s feelings and emotions often originates in their imagination via imagery forms. The ultimate utopian goal is to drive the public to achieve rational happiness. Since the public, based on their nature and general habits, in effect cannot perceive the rational truths, the path to rational happiness must be represented via their imagination. Moreover, their imaginary concepts and forms should be made the permanent. So bringing rational happiness to people's minds through their imagination, the media of each society should represent rational truths through the sensory and imagery forms familiar to that society. The Farabian theory of cognition shares aspects of relativity as well as rationality. To Farabi, rational truth and rational happiness is fixed and one, having only one denotation, while its connotations, say, images and imagery forms are various and sundry. That being the case, different communities can have different ways to perceive the same truth, working toward the same goal.
 
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