Showing 20 results for Tabarsa
Volume 1, Issue 3 (11-2011)
Abstract
In the new economy, knowledge plays a key role in the society and knowledge creation is the key of growth. There are many different organizational factors that affect on knowledge creation. In this study, the authors have studied the role of organizational intelligence in knowledge creation through organizational learning. Research methodology includes both descriptive and correlation analysis based on Structural Equation Modeling. Data for this descriptive study was collected from 140 employees of Saipa Yadak trading co. to evaluate 3 original hypotheses. The results showed that there is a significant relationship between organizational intelligence and organizational learning and also between organizational intelligence and knowledge creation. The findings showed a positive and meaningful relationship between organizational learning and knowledge creation too.
Volume 4, Issue 4 (3-2015)
Abstract
The present study was conducted to investigate the relationship between job burnout and spiritual intelligence. In terms of purpose the study is practical and in terms of data collection methods is survey and it is a descriptive research. The statistical population is consist of all employees at Tehran's Imam Khomeini Relief Committee who are 260 persons and number of sample is 80. The tool of data collection is questionnaire of spiritual intelligence and questionnaire of job. For analyzing the collected data following test were used: one sample T-test, tests of two sample means, analysis of variance and Pearson correlation test. Research findings showed, which indicates that there are a significant negative relationship between job burnout and spiritual intelligence. In other words, if the spiritual intelligence of employees increase, job burnout will be reduced.
Mehdi Tabarsa, , ,
Volume 5, Issue 1 (6-2016)
Abstract
Extracted polysaccharides from green seaweeds are heterogeneous in structural and molecular properties. Basically, sulfated polysaccharides from green seaweeds contain various amounts of rhamnose (16.5-45.0%), xylose (2.1-12.0%), glucose (0.5-6.4%) and sulfate (16.0-23.2%), and their building blocks are chiefly comprised of β-D-GlcpA-(1 → 4)α-L-Rhap3s. Molecular weight of sulfated polysaccharides varies from 93.4 × 103 to 1690 × 103 g/mol. The biological effects of seaweed sulfated polysaccharides are immunomodulation, cancer cell growth suppression, antioxidation, antihyperlipidemic, antiviral and anticoagulation. As the chemical structure and molecular properties of sulfated polysaccharides differ from one seaweed species to another, the biological properties varies subsequently. Overall, given the fact that highly variable marine environment can significantly incorporate into the existing discrepancies of sulfated polysaccharide structures due to seaweed phylogenetic differences, executing more comprehensive studies on various species is necessary to have a better understanding of their function and future applications
Mehdi Tabarsa, , ,
Volume 5, Issue 4 (3-2017)
Abstract
Effect of different temperature (30 to 90 °C), time (10 to 70 min) and pH (4 to 9) conditions were investigated on the extraction efficiency of polysaccharides from seaweed E. intestinalis. Results showed that the extraction temperature had the highest effect on the enhancement of polysaccharide content. The highest polysaccharide extraction yield was achieved at 90 °C, 30 min and pH 8. Therefore, antioxidant effects of polysaccharides obtained at temperatures 30, 70 and 90 °C, times 10, 30 and 50 min, and pH 4, 7 and 8 with significant yield differences were evaluated. DPPH radical scavenging activity, ferric reducing power and total antioxidant activity were employed in order to evaluate the antioxidant properties of polysaccharides. The maximum DPPH radical scavenging activity was obtained for polysaccharides of 30 °C (73.90%), 30 min (95.08%) and pH 7 (75.61%). The highest reducing power was achieved for polysaccharides of 70 °C (97.49%), 50 min (99.05%) and pH 8 (97.49%). The maximum total antioxidant activity was obtained for polysaccharides of 70 °C (49.97), 10 min (62.32) and pH 7 (59.11 mg ascorbic acid/ g dried seaweed powder?). Overall, findings of current study suggest that the polysaccharides from green seaweed E. intestinalis possess antioxidant capacity and that the use of high temperature, long time and acidic or basic pH in extraction process results in diminishing this antioxidant capacity.
Mehdi Tabarsa, Niloofar Jokar Borazjani, Masoud Rezaei,
Volume 6, Issue 2 (9-2017)
Abstract
The extraction of hydrocolloids from seaweeds is associated with production of secondary metabolites during pretreatment step. In this study, the antioxidant properties were evaluated for secondary metabolites from brown seaweed S. angustifolium. The crude extract obtained by 80% ethanol for four hours and then partitioned using hexane, chloroform, ethyl acetate and water. The extraction yield was found to be 4% for crude extract and varied between 2.8-43% for fractions. The evaluation of antioxidant properties revealed a successful solvent fractionation in portioning antioxidant compounds. Among various fractions, ethyl acetate exhibited the highest activity in DPPH radical scavenging (75.78%), ABTS radical scavenging (88.92%), reducing power (67.54%) and total antioxidant (0.34 Abs) capacities. The highest amount of phenolic contents was found in ethyl acetate fraction (277.86 mg/ TA in extract) while the lowest amount was in aqueous fraction (21.36 mg/ TA in extract). The highest correlation (R2 = 0.88) was observed between total phenolic content and total antioxidant activity. Overall, the results of current study show that ethanol extract of S. angustifolium contains major bioactive compounds suggesting its potential application in food industry as a natural antioxidant.
Volume 9, Issue 4 (3-2020)
Abstract
The main purpose of this study is to predict the behavior of employees according to perception of possible changes in their organizational resources. This research aims to discover the latent behavioral intentions which individuals showing in common, within an organizational ecosystem through an objective approach. Using sequential exploration strategy, the research was implemented through 5 main steps and research model has been verified by means of experimental and empirical methods. The ecosystem studied in this study, was Iranian state and semi-state banks, which were precisely studied in 416 subjects. Also, in order to obtain a model for predicting the organizational behavior of employees, at first, behavioral intentions were typologized by conservation of resources approach, and then modeled with fixed and random effects in form of mixed equations. Results showed that predictions of human behaviors at the ecological level of resources have great commonalities that can be identified by a resource-based approach. The results also showed that the behavioral intentions of employees in Iranian state and semi-state banks in threatenedsocial support is to be passive, andin the presence of positive or negative perceptual interaction from leader, this tendency could change from " being passive” to "trying to retain" in both cases. Identifying the boundary points of changing behavioral intentions and the distance of employees’“behavioral intention" from these points was another finding of this study that could be a guide for regulating effective interventions of leadersin the studied ecosystem.
Saeed Khajavi, Mehdi Tabarsa, Hassan Ahmadi Gavlighi, Masoud Rezaie,
Volume 10, Issue 1 (1-2021)
Abstract
Polysaccharides possess diverse biological properties due to complexity of chemical structure and heterogeneity of molecular weight which could be improved through engineering approaches and chemical modifications. The objective of the present study was to determine the antioxidant and anti-diabetic effects of marine and land originated polysaccharides and explore the correlation between molecular weight and biological activities. Hence, four polysaccharides with varying size distribution and average molecular weight including fucoidan and alginate from brown seaweed Padina pavonica and polysaccharides from Flixweed (Descurainia sophia) and Fennel (Foeniculum vulgare) were subjected to hydrolysis in three levels using 0.05N hydrochloric acid at 100 C for 5, 10 and 20 minutes. The average molecular weight ranged between 2059.5-3781.8 in fucoidan, 1774.4-2324.9 in alginate, 720.4-1373.8 in Flixweed and 5752.6-14077.5 × 103 g/mol in Fennel. The relation between molecular weight reduction and α-amylase activity inhibition was decreasing in fucoidan (52.1-32.8%) and alginate (67.6-32.2%) and increasing in Fennel (61.2-45.0%). Reduction of molecular weight enhanced the DPPH radical scavenging and ferric reducing power of fucoidan (47.9-27.8%; 0.47-0.37 Abs) and Fennel (39.0-12.7%; 0.34-0.16 Abs). The effect of molecular weight reduction was limited on antioxidant activities of alginate and Flixweed. Overall, the findings of the current study revealed that molecular weight is a determinant factor affecting bioactivities of the tested polysaccharides and thus their applications as ingredients having anti-diabetic and antioxidant functions could be possible in their native and/or hydrolyzed forms.
Volume 10, Issue 2 (6-2010)
Abstract
154
Abstract
Numerical Analysis of Ground Reinforced with a
Stone Column Group
Saeedeh Tabarsaz and Abbas Soroush
School of Civil and Environmental Engineering, Amirkabir University of Technology, Tehran,
Iran
soroush@aut.ac.ir
Abstract
This paper presents the numerical analyses of a group of stone columns penetrated in
a 10 m deep soft clay stratum. A rigid raft transfers the super-structure's loading to
the stone columns and the parent ground. The columns group comprises of five
columns with a symmetric configuration. The numerical analyses are performed on a
plane strain idealization of the structure, using an elasto plastic constitutive behavior
for both the stone columns and the soft clay layer. Additional numerical analyses
with different range of parameter, like number of columns, space of columns,
column’s length, foundation’s size, Poison ratio of soil and stone columns’ material
and modulus of elasticity ratio of the stone columns’ material were conducted. The
results of analyses showed that lateral displacements (bulging) occur in the upper
parts of the columns (between 2D and 4D from the top; D is the column diameter)
and the lateral displacements are comparatively higher for the side columns. The
major result of the analyses is that for a group of stone columns supporting a rigid
raft under spread loading, the lengths of the stone columns could be designed
unequal, i.e., inside the columns can be shorter, without significantly increasing of
the settlements of the column group.
Marzieh Ramzani Shemami, Mehdi Tabarsa,
Volume 10, Issue 3 (9-2021)
Abstract
Polysaccharides are one of biomacromolecules that, in addition to their peculiar physicochemical properties, possess promising biological capabilities depending on chemical structure. The objective of the present study was to evaluate the effect of molecular weight of galactofucan polysaccharides from freshwater plant Azolla filiculoides on its ability to stimulate RAW264.7 macrophage cells and inhibition of oxidation reactions. Galactofucan polysaccharide was extracted by distilled water at 65°C for 2 hours and recovered using 70% ethanol. Polysaccharide hydrolysis was performed using 0.01N HCl at 100°C for 5, 10 and 15 minutes. Crude and hydrolyzed polysaccharides were mainly composed of neutral sugars (67.46-68.02%), lower amounts of uronic acids (4.48-4.53%) and ranged in the molecular weight of 99.4-783.0 × 103 g/ mol. Crude and hydrolyzed polysaccharides were non-toxic and hydrolysis 15 resulted in the greatest stimulation of proinflammatory response in RAW264.7 macrophage cells releasing a considerable amount of nitric oxide (55.6 μmol) into culture medium. Hydrolysis 15 led to the highest DPPH radical scavenging (65.2%) and Fe3+ reducing power (0.5 Abs). Overall, the present findings indicated that galactofucan polysaccharides have the ability to boost immune system and inhibit oxidation reactions and that molecular weight reduction to specific levels could improve the biological activities.
Nafiseh Sadat Mousavi, Mehdi Tabarsa, Hassan Ahmadi,
Volume 11, Issue 2 (5-2022)
Abstract
Polysaccharides possess diverse biological properties, mostly owed to their structural complexity and molecular heterogeneity, that could be improved through engineering methods and application of structural modifications. The objective of the present study was the assessment of antioxidant properties of hydrolyzed fucoidan from seaweed Nizamuddinia zanardinii and the correlation of molecular weight with biological function. After the removal of pigments and low molecular weight compounds, crude extracted polysaccharide was hydrolyzed at 100 C for 10, 20, 40 and 60 minutes using 0.01N HCl. The average molecular weight of crude fucoidan 1254.4 × 103 g/mol and for hydrolysates FH10, FH20, FH40 and FH60 was 974.5, 891.8, 806.5 and 705.5 × 103 g/mol, respectively. With the decrease of molecular weight, hydrolysates, compared with the crude fucoidan, exerted considerable DPPH (61.27-84.54%) and ABTS (40.1-88.5%) radical scavenging and Fe3+ reducing power (0.49-0.81 Abs) activities. Among different samples, hydrolysate FH20 showed the greatest capacity for DPPH radical scavenging activity (70.45-84.54%) and Fe3+ reducing power (0.49-0.81 Abs). Overall, the results of the current study showed that hydrolysis and reduction of molecular weight significantly improved the antioxidant activities of the fucoidan while time did not result any significant differences in antioxidant properties of hydrolysates which could be due to alterations in functional groups. Hence, fucoidan isolated from the examined species could be utilized as antioxidant agents in forms of native or hydrolysates.
Amirhossein Valipour, Abdolmohammad Abedian Kenari, Mehdi Tabarsa,
Volume 11, Issue 3 (8-2022)
Abstract
This experiment evaluated the effect of soluble polysaccharides in Spirulina platensis microalgae on growth performance, body composition and immune response of rainbow trout (Oncorhynchus mykiss). In this regard, 180 rainbow trout (17.22 ± 0.5g) were selected and distributed in five experimental treatments (with three replications). Treatments included different levels of polysaccharide in dosage of 0 (control), 500, 1000, 2000 and 3000 mg / kg of feed. According to the results, in growth factors (final weight, body weight gain, specific growth factor, protein efficiency, feed conversion ratio and condition factor), no significant difference was observed. The highest and the lowest amount of carcass proteins were observed in the diet containing 500 mg polysaccharide and control, which showed a significant difference. The amount of fatty acids of the muscle of the fish body did not show any significant difference among the treatments. The highest and lowest levels of lysozyme activity were observed in treatments of 2,000 mg polysaccharide and control and the highest and lowest levels of complement activity were observed in treatments containing 3000 mg polysaccharide and control respectively (P <0.05). In general, the use of polysaccharide extracted from micro-algae did not significantly improve rainbow trout growth, but a slight improvement in growth and body composition (protein) in 500 mg polysaccharide per kg of diet was observed. In terms of safety indicators, treatments of 2,000 and 3,000 mg of polysaccharides per kg of diet had a good performance and could be used whenever needed.
Masoumeh Ghanbari Kiasara, Mehdi Tabarsa, Hassan Ahmadi, Amin Mokhlesi,
Volume 11, Issue 4 (12-2022)
Abstract
The aim of the current study was the evaluation of stepwise recovery of fucoidan extracted from seaweed Nizamuddinia zanardinii and the assessment of relationship between sulfate content and molecular weight with its antioxidant activity. After the removal of pigments and low molecular weight compounds, fucoidan extracted with water was precipitated using different concentrations of ethanol at three levels (30, 50 and 70%). Three fractions of Fuc30, Fuc50 and Fuc70 showed molecular weights of 731.62, 655.76 and 10.41 × 103 g/mol, respectively. The content of sulfate esters in the obtained fractions were measured between 6.49-25.03%. The color evaluation of produced fucoidans by a digital chroma meter indicated the highest lightness index for Fuc50 fraction. Antioxidant results were varying in DPPH radical (43.93-89.40%) and ABTS radical (25.05-96.10%) scavenging activities as well as Fe3+ reducing power (Abs of 0.142-0.259). Overall, the findings of the present study indicated that stepwise precipitation of fucoidan from N. zanardinii leads to production of fractions with different chemical and molecular weight characteristics and antioxidant activities. Besides, although all isolated fucoidan fractions are introduced as potent antioxidant compounds, polymers possessing lower molecular weight and greater sulfate content exert higher antioxidant activities.
Volume 12, Issue 2 (Spring 2024)
Abstract
Aims: The purpose of the present study was to investigate the antioxidant and anti-inflammatory properties of glucosamine hydrochloride (G-HCl), glucosamine sulfate sodium chloride (GS-Na) and glucosamine sulfate potassium chloride (GS-K) isolated from the shells of Litopenaeus vannamei obtained from a shrimp processing plant.
Materials &Methods: G-HCl was synthesized via hydrolysis of chitin with concentrated HCl followed by several sequential decolorization, crystallization and washing steps. Using G-HCl as the precursor, addition of sodium and potassium sulfates at 40 ºC for 1 h resulted in production of GS-Na and GS-K.
Findings: The yield of chitin was found 19.9% and those of glucosamine products ranged between 75.5%-82.5%. The HPAEC-PAD indicated the presence of glucosamine monomers, as compared with commercial standard, with different elution time to that of glucose. The appearance of characteristic signals of O-H, N-H and C-O-C in the FT-IR spectra provided further support of glucosamine successful isolation. SEM images and EDX spectra of glucosamines confirmed the elemental compositions of samples and their polyhedral crystalline structures. DSC and TGA thermograms indicated endothermic and exothermic peaks specific to glucosamine products. Relatively low DPPH and ABTS radical scavenging activities and ferric reducing power was obtained for all glucosamine products. all the glucosamine derivatives indicated an anti-inflammatory effect on LPS-simulated RAW264.7 cells.
Conclusion: Glucosamine products showed no cytotoxicity and down-regulated the release of NO in RAW264.7 murine macrophage cells induced by LPS. Overall, the present results indicated the successful production of glucosamine from the waste of L. vannamei processing plant with antioxidant and anti-inflammatory properties.
Volume 12, Issue 4 (Issue 4 (Tome 59)- 2009)
Abstract
Performance appraisal is considered as an important and critical function in facilitating organization effectiveness in the field of human resource management. In recent years, there has been more attention toward the role of performance appraisal system, became it is believed that an effective performance appraisal system can present many advantages for the organization and its members. Performance appraisal system has gained considerable attention from public sector especially in Iran and in recent years the government has tried to implement this system by improving its present status among managers, supervisors/experts and employees.
In this article, the degree of past and present performance appraisal effectiveness is studied and in this regard 7 hypothesis and its referent questions are presented. By testing in a comparative method the questionnaire forms are distributed among certain members of experts in the ministry of economic affairs. The results indicate a comparison between past present performance appraisal system show a remarkable move toward a better system in the future. At the end, recommendations for developing and improving a system of performance appraisal system for public employees also removal of current difficulties and upgrading the effectiveness of the system are presented.
Shahab Naghdi, Masoud Rezaei, Mehdi Tabarsa, Mehdi Abdollahi,
Volume 14, Issue 0 (2-2025)
Abstract
In recent decades, the aquaculture industry has experienced a growing trend. In this regard, rainbow trout (Oncorhynchus mykiss) is known as one of the most popular species in the world and in Iran, with Iran ranking first in the production of this fish with an annual production of about 237,710 tons. After processing this fish, about 30% of it is considered as processing residue, which includes head, bone, viscera, etc. In the present study, a mixture of minced head and backbone waste from this fish was used to extract glycosaminoglycan using the alkaline dissolution method. The results showed that the extraction yield, carbohydrate, sulfate, uronic acid and protein content of the extracted glucosamine-glycan sample were 1.96 ± 0.14, 59.67 ± 3.66, 10.19 ± 0.38, 7.76 ± 0.20 and 11.23 ± 1.43%, respectively. Additionally, the infrared spectroscopy (FTIR) analysis of the obtained sample indicated the presence of broad peaks in the range of 3200 to 3600 cm-1 and 2700 to 3000 cm-1, corresponding to the functional groups –OH and the stretching band C-H, and the bending band of sulfate S=O at 1245 cm -1. Furthermore, the stretching band of the functional group COO-, related to the presence of uronic acid in the extracted sample, was observed in the range of 1480 to 1640 cm -1. The peaks appearing at 1385 and 11450 cm -1 were related to the stretching band O-C=O and the stretching vibration –CO in the COOH group.
Volume 17, Issue 1 (2-2013)
Abstract
In turbulent environment, power and success of organizations depend on the intellectual capita; abilities and the main challenges of these organizations are on that how to establishe new generation of intelligent organizations for knowledge edge. The problem this research wants to solve is that how an organization that its main asset is intellectual capital can obtain organizational intelligence. The conceptual model of this research has been designed based on open system mode,l and the knowledge strategies, knowledge communities, adhocracy and intellectual capital have the enabler role for intelligence processes. Statistical population of this research includes the faculty members of the research centers of the Ministry of Science, Research and Technology. Totally, 278 persons have been selected based on classified sampling. The results showed that adhocracy with %86 of coefficient has the highest effect on structural intelligence processes. Also knowledge strategies and intellectual capitals correspondingly with %67 and %64 of coefficient are in the second and third rankings. Also the results showed that adhocracy with %64, intellectual capital and knowledge strategies with %59 of coefficient correspondingly have the highest effect on human intelligence processes.
Volume 18, Issue 116 (October 2021)
Abstract
Sulfated polysaccharides presenting in the cell wall of seaweeds and aquatic plants exhibit a diverse range of biological functions mainly due to their particular structural and molecular properties. The aim of the current study was to evaluate the inhibition of oxidation reactions and activities of digestive enzymes including α-amylase and α-glucosidase by sulfated polysaccharides from aquatic plant Myriophyllum spicatum. After the removal of pigments and low molecular weight compounds, polysaccharides were extracted by distilled water at 60°C for 2 hours. Polysaccharide purification using DEAE Sepharose FF led to production of two fractions including F1 and F2. Obtained polysaccharides were considerably capable of scavenging DPPH free radicals (20.62-64.81%) and reducing Fe3+ ions (0.24-0.50 Abs) with F1 fraction exhibiting the greatest activity. Polysaccharides inhibitions against α-amylase activity were greatly different (22.50-63.20%) with the lowest IC50 being 1.31 mg/mL for F2 fraction. α-glucosidase activity was reduced to various levels (1.30-89.5%) and the lowest IC50 of 10.0 mg/mL was observed for crude polysaccharide. Overall, these findings indicated that sulfated polysaccharides from M. spicatum L. possess promising antioxidant, α-amylase and α-glucosidase inhibition potentials depending on their chemical and molecular structure and thus could be considered as antioxidant and anti-diabetic agents.
Volume 18, Issue 117 (November 2021)
Abstract
Pomegranate peel is the main by-product during pomegranate processing that valuable source of bioactive compounds with health-beneficial effects. This study has comparatively assessed the effects of two extraction methods (enzymatic and acidic) on pomegranate peel by measuring their bioactivity in terms of total phenolic content (TPC), antioxidant activity, and antidiabetic properties using the 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical scavenging and 2,2′-azino-bis-3-ethylbenzthiazoline-6-sulphonic acid (ABTS) radical cation decolourization assays, and the α-amylase and α-glucosidase inhibition assays. The TPC mg gallic acid equivalents per g dry weight (GAE mg/g dw) of extracted pectin was ~ 243 and ~ 116 for enzymatic and acidic methods, respectively. The DPPH IC50 of enzymatic pectin was significantly lower than that of acidic pectin (p < 0.05). The ABTS IC50 of enzymatic pectin and acidic pectin was ~ 361 and ~ 945, respectively. The enzymatic pectin showed a significantly stronger α-amylase and α-glucosidase inhibition effect as compared to the acidic pectin. The α-amylase inhibition was stronger than α-glucosidase inhibition for all samples.
The results indicated that enzymatic extracted pectin showed antioxidant and antidiabetic potential, which could be considered as a promising candidate for functional foods in food formulation.
Volume 19, Issue 122 (April 2022)
Abstract
Lentil consumption has been constantly growing due to its nutritional composition and functional properties. Lentil seeds are rich in several bioactive compounds with an effect on decreasing the symptoms of diabetes, cardiovascular disease, and aging. In this study, the effects of acetone extract (GLA extract), soluble fiber (GLSF), and protein (PGL) extracted from green lentils (concentration of 50 mg/ml) on anti-diabetic properties were investigated by measuring the inhibitory activity of alpha-amylase and alpha-glucosidase. There was no significant between the inhibitory activity of alpha-amylase activity by GLA extract and PGL (p < 0.05). Also GLA extract had the greatest effect on inhibition of glucosidase activity (67.08%). Fluorescence quenching had studied the changes in the tertiary structure of alpha-amylase and alpha-glucosidase using different concentrations (0, 0.25, 0.50, 1.00, 2.00, 4.00 mg/mL) of GLA extract, GLSF, and PGL. The results showed that all three compounds extracted from green lentils play as a natural source to inhibit the activity of alpha-amylase and alpha-glucosidase enzymes and be used in the production of functional foods.
Volume 19, Issue 132 ( February 2023)
Abstract
Maize bran is the most common by-product of maize milling process and it is mainly used as animal feed. In this study, antioxidant and anti-diabetic activities of two types of maize fiber gum, FAX (fiber with phenolic compounds) and Y (fiber without phenolic compounds), were examined. In addition, intrinsic and extrinsic fluorescence intensity was assessed to explore the inhibitory mechanism of two enzymes, α-amylase and α-glucosidase. The results revealed that FAX had the highest DPPH radical scavenging property at 39.74 ± 0.399 µmolTE/g, whereas Y had 3.73 ± 0.257 µmolTE/g. Furthermore, the ABTS cationic radical scavenging activity in FAX was 137.10 ± 2.99 µmolTE/g, whereas Y was 29.68 ± 1.17 µmolTE/g. FAX had a higher inhibition rate of porcine α-amylase enzyme activity than Y, and the difference was significant (p ˂ 0.05). FAX inhibited rat intestinal α-glucosidase activity the highest (26.15%), whereas Y had no enzyme inhibition property at the concentration used. In addition, applying different concentrations of both fibers to α-amylase and α-glucosidase enzymes resulted in a decrease in fluorescence intensity; however, this intensity was higher for FAX. Both fibers were able of inhibiting both enzymes by changing the third structure of the enzyme via non-covalent bonds. Overall, the results showed that high phenolic fiber from maize bran can be consider as a natural source of antioxidant activity and inhibition of α-amylase and α-glucosidase enzymes, and that it can be used in the production of functional foods.
