Search

In this study, bee pollen at different levels (3, 6, 9, 12 and 15%) was added to the gluten-free cake containing corn starch and the samples were evaluated in terms of physiochemical and technological properties. The results showed that the addition of bee pollen had no significant effect on the consistency of the batter (p <0.05). However, it reduced the pH and increased the density and specific gravity of the batter. Cake volume was increased from 104.7 mL in the control to 112.3 mL in 6% pollen sample and then decreased significantly (p<0.05). A similar trend was observed for specific volume. The height of cake loaf was 5.3 cm in control that was decreased to 4.7 cm in 15% pollen cake. Incorporating bee pollen reduced baking loss,so the sample with 15% pollen had the lowest baking loss. Moreover, adding pollen to the gluten-free cake was associated with an increase in moisture, ash and browning index values and a decrease in its water activity. The porosity and microstructure analysis showed that addition of bee pollen increased cake porosity (from 20.3 to 30.8%) and the average cell area of the samples (from 5.1 to 14.7 per cm2) in comparison with control sample. In addition, sensory analysis showed that cakes containing 6 and 9% pollen had the highest overall acceptance compared to other samples. Therefore, medium levels of bee pollen can be used to produce functional glutenfree cakes with desirable sensory and technological characteristics. [ABSTRACT FROM AUTHOR]

Today, increasing the quality and nutritional value of food consumed by patients with celiac disease has attracted the attention of many researchers. Therefore, the aim of this study was to investigate the possibility of improving the quantitative and qualitative characteristics of gluten-free cake by replacing brown rice flour at three levels of 0, 50 and 100% by white rice flour in the presence of native Iranian gums (Isfarzeh, Qodoume Shirazi and Farsi separately at level of 1%). Results showed by increasing the amount of replacement of brown rice flour and adding gums, the viscosity of the dough increased, while with increasing the amount of these compounds, the specific gravity of the dough increased and decreased, respectively. The results showed the amount of protein, fat, moisture, firmness of the texture (during both periods) increased with the replacement of brown rice flour, while the addition of gums only affected the moisture and firmness of the texture in such a way that with the addition of gums, the amount of texture firmness decreased and the amount of moisture in the product increased. Regarding the specific volume and porosity of gluten-free cake, the results showed that with increasing the replacement of brown rice flour and the use of gums, the amount of these parameters decreased and increased, respectively. On the other hand, according to the results, among the gums used, Isfarzeh gum had more ability to improve quality of final product in compare o the other gums. According to the results, with increasing the amount of replacement of brown rice flour, the amount of L* and a* components of the samples had a downward and upward trend, respectively, while the addition of gums only increased the amount of L* component. Finally, the panelists evaluated the sensory properties and introduced two samples containing 0% brown rice flour with Isfarzeh gum and sample containing 50% brown rice flour and Isfarzeh gum as the best samples. [ABSTRACT FROM AUTHOR]

Improvement of dough preparing methods and use of some additives seem necessary to delay staling, which is considered one of the important problems in the baking industry. In this regard, this research studied the effects of mixer rotation (750 and 1000 rpm), various levels of guar gum and DATEM (both at 0.5 and 1%), and baking temperature (200 and 220 0 C) on physicochemical, thermal and organoleptic properties of Toast bread samples. A completely randomized design was used to analyze the data and Duncan’s multiple range test was conducted for comparison of the means at the 5% significance level (á = 5%) in SPSS 16. The results suggested that hydrocolloid (guar gum) and DATEM incorporation increased moisture, protein and ash contents, specific gravity, peak temperature and brightness index, but decreased staling of the samples and enthalpy of fusion of the starch. In addition, most sensory characteristics of bread samples also improved. The guar gum did not affect the pH, but the samples containing 1% DATEM had the lowest pH values. It is noteworthy that the sample treated with 0.5% guar and 0.5% DATEM that was mixed at 1000 rpm and baked at 200 0C was introduced as the most desirable formulation. [ABSTRACT FROM AUTHOR]

In this study, maltodextrin (0, 25 and 50%) and traditional Ghavoot (0, 3, 6 and 10%) were used in muffin formulation. The aim of this research was production of low sucrose and functional product and evaluated specific gravity and consistency and moisture, specific volume, porosity, firmness and overall aceptability. The results showed that replacing 50% of sucrose by maltodextrin increased specific gravity. Maltodextrin at both levels (25 and 50%) increased the viscosity. Consistency was increased in the presence of maltodextrin and 10% of Ghavoot. The moisture content of the samples was affected by maltodextrin 2 hours after baking. However, the moisture content of the muffin was affected by both compounds (maltodextrin and qavut) within one week after baking. The sample containing 50% maltodextrin and 10% Ghavoot had the highest moisture content during the shelf life. The sample containing 25% maltodextrin and 3% Ghavoot had the highest specific volume (4.57 mg/cm³) and porosity (24.17%) and similar to the control sample (4.86 mg/cm³). The findings showed Ghavoot and increasing levels of this component didn’t have significant effect on firmness. The replacement of sugar by 25% maltodextrin decreased firmness one week after baking. Crust color of control was darker than the other sample. Control had the lowest L* and b* value and the highest a* value. Finally, the sample containing 25% maltodextrin and 3% Ghavoot, a sample containing 25% maltodextrin and 6% Ghavoot the control sample introduced in sensory evaluation. [ABSTRACT FROM AUTHOR]

In the current research, the effects of different ohmic assisted hydrodistillation (OAHD) parameters including voltages gradient (5, 15 and 25 v/cm), extraction time (30, 75 and 120 min) and NaCl concentrations (0.5, 1 and 1.5%) on the extraction yield, energy consumption and total phenol content (TPC) of Salix aegyptiaca L.essential oil were investigated, and then compared with conventional hydrodistillation (HD). Finally, artificial neural network (ANN) modeling is utilized to predict kinetics of essential oil extraction. Result revealed that extraction time and voltage gradient had significant effect on extraction yield, energy consumption and TPC (p<0.05). Extraction yields of essential oil obtained by OAHD and HD were 0.119 ± 0.012 and 0.081 ± 0.01, respectively. There was no significant difference (p>0.05) between specific gravity, refractive index and TPC of essential oil of OAHD and HD methods, however IC50 of essential oil extracted by OAHD was significantly higher than essential oil obtained with HD method (p<0.05). To design the ANN model, voltages gradient, extraction time and salt concentrations and their interactions were considered as input vectors while the extraction yield of essential oil was considered as the model output. The results showed that the best prediction performance belonged to 3-9-8-1 ANN architecture (RMSE=0.036 and R2=0.99). Therefore, it can be concluded that the OAHD method is applicable for S. aegyptiaca L. essential oil extraction and ANN model is an efficient quantitative tool to predict the kinetics of essential oil extraction. [ABSTRACT FROM AUTHOR]

Resistant starch type III as a dietary fiber is included in the prebiotic composition. It can be used to enrich low-calorie, gluten-free diets for celiac patients. The aim of this study was to investigate the possibility of improving the quantitative and qualitative properties of gluten free rice cake via replacement rice flour by resistant starch type III at levels of 0, 5, 10, 15, 20, 25 and 30%. Physicochemical, textural and sensory properties of the product were evaluated in a completely randomized design (P˂0.05). The results showed that replacing the rice flour by resistant starch in the gluten free rice cake formulation reduced the specific gravity of batter and increased the moisture content of the final product. Also, by replacing rice flour by resistant starch up to 20%, the height, specific volume and porosity of the final product increased and then decreased. On the other hand, the sample containing 20% resistant starch had the lowest firmness at 2h, 3 and 7 days after production. In addition, the results showed that 25 and 30% replacements of the resistant starch in gluten-free rice cake formulation by rice flour, the L* value of the crust and crumb increased and the a* and b* were reduced. Finally, the panelists by evaluating the sensory properties such as shape, color, texture firmness and softness, taste and overall acceptance the sample containing 80% rice flour and 20% resistant starch type III introduced as the best sample. Therefore, according to the results of the physicochemical and sensory evaluation, replacement of 20% rice flour by resistant starch type III in gluten free cake formulation can produce a lower calorie product suitable for celiac patient. [ABSTRACT FROM AUTHOR]

At the present study the quality and the physicochemical properties of the honey from east Azarbaijan markets were evaluated. In this study, 15 honey samples from Ahar, Tabriz and Kaleibar were collected randomly. At first the samples were transferred to the laboratory and preparation for tests such as solids content, moisture, pH, specific gravity, acidity, reducing sugars and non-reducing sugars (sucrose) and hydroxyl-methyl-furfural were performed. The results indicated that the moisture content for all samples are lower than world standards. Honey Samples from Ahar and Tabriz regions significantly had higher content of soluble solid compounds and specific gravity in compared to Kaleibar honey samples. The samples from Tabriz and Kaleibar significantly had high acidity and lower pH in compared to Ahar samples (P<0.05). Furthermore, all samples had desirable content of reducing sugars, non-reducing sugars (sucrose) and hydroxyl-methyl-furfural according to Codex and International Standards. The results of this study showed that the honey samples that were obtained from Tabriz, Kaleibar and Ahar regions have desirable quality characteristics according to national and international standards. [ABSTRACT FROM AUTHOR]

Maple syrup is a natural sweetener that it can replace sucrose. This compound contains polyphenols, antioxidants, repair compounds of nerve cell, calcium, iron and other compounds that it can promote nutritional health and the Possibility to produce low calorie products. The main role of sugars in enhancing the product's desirability is related to their sweetening role, improving the creamy properties and helping to highlight the fruity aroma. With all the benefits that sucrose has as a natural sweetener, it's high consumption is not recommended because of its undesirable side effects. The purpose of this study has been to investigate the possibility of sugar substitution with maple syrup and its effect on physicochemical, rheological, microbial and sensory characteristics of ice cream. In this study maple syrup was used and reviewed at 0, 25, 50 and 75% levels as sugar substitute for ice cream production. Then physicochemical, rheological, microbial and sensory tests were performed. The results of the tests were analyzed on the basis of completely randomized design at 5% probability level. With increasing replacement percentage, the viscosity and hardness of treatments increased significantly (p <0.05). The amount of dry matter, volume increase, specific gravity, melting speed were reduced significantly. The results of sensory tests showed that replacement at 50% and 75% had a significant effect on overall acceptance compared to control, and replacement at 50% was selected as the most appropriate replacement level. According to there is in the country, possibility to operation from maple tree, therefore, from maple syrup alone or in combination with other sweeteners can be used in various food products and dairy desserts to sweeten, increase flavor, production of lowcalorie and dietary products suitable for all ages. [ABSTRACT FROM AUTHOR]

In this project, low-fat composite (wheat-quinoa) cup cake was produced. Plantago major L. gum and water (1.5-7.5, 3-15, 4.5-22.5 and 6 -30%) was used as a fat replacer in levels of 0, 25, 50, 75 and 100 % in cup- cake. PH, specific gravity, viscosity, moisture, firmness, crust color and overall acceptability were evaluated. PH and b* value were decrease and moisture and a* value were increased by increasing of Barhang gum. The samples containing 1.5 and 3 % gum had the lowest specific gravity and the highest specific volume and L* value. Also, the highest viscosity was indicated in the sample containing 3 % gum. On the other hand, the sample containing 3 % gum had the lowest firmness in 2 hours and 1 week after baking. Finally, the samples containing 1.5 and 3 % gum had the best overall acceptability. Therefore, it can be said that the removal of 50% of oil in cake formulation was performed successfully. [ABSTRACT FROM AUTHOR]

In this project, low-fat composite (wheat-millet) cup cake was produced. Fenugreek seed gum (0.25, 0.50, 0.75 and 1%) was used as a fat replacer in levels of 0, 25, 50, 75 and 100 %. specific gravity and consistency of batter and moisture, specific volume, porosity, firmness (2 hours and 1 week after baking), crust color and sensory properties of chiffon cake were measured. The sample containing 0.25% Fenugreek seed gum had the lowest specific gravity and firmness and the highest specific volume, porosity, L* value and overall acceptability score. Also, the result showed the technological and sensory properties of sample containing 0.25% Fenugreek seed gum was similar to control. Moisture and a* value were increased and b* value was decreased by increasing Fenugreek seed gum. Finally, the removal of 50% of oil in chiffon cake formulation was performed successfully. [ABSTRACT FROM AUTHOR]