Showing 8 results for Mousavi Kalajahi
Volume 16, Issue 86 (4-2019)
Abstract
Recognizing the relations between different variables of fat replacing, modeling could contribute to an optimum control of the process and accordingly improve the quality of the final low fat product such as yogurt. In the present study, the Response Surface Methodology (RSM) and Central Composite Design (CCD) has been applied to investigate the effects of different concentrations of inulin (0, 3 and 6%) as a fat replacer, heat treatment (70, 82.5 and 95°c) and various shear stresses using a stirrer (3000, 6000 and 9000 RPM) on gelling properties of yogurt and also different quality attributes of a low fat yogurt. The equations obtained from the study showed that undependent variables had significant effects on the measured attributes (p<0.05). The most effective factor was inulin concentration that improved the low fat yogurt texture, although higher concentrations had negative effect on sensory properties and color. On the other hand, heat treatment had significant effect on gelling ability of yogurt. In sum, sample with 3% inulin, processed at 82.5°C and stirred at 6000 RPM was selected as optimum condition for prebiotic yogurt processing by inulin.
Volume 16, Issue 89 (7-2019)
Abstract
Understanding the relation between different variables affecting deep-fat frying before and during the frying process through the modelling, could be used to set up the optimal conditions for controlling the process that results in improvement of the quality of final fried product. In the present study, the Response Surface Methodology (RSM) and Central Composite Design (CCD) was employed in order to investigate the effects of independent variables including blanching and soaking in different concentration (3, 5 and 7%) of sodium chloride solution as well as vacuum drying (1, 2 and 3 hours) prior to deep-fat-frying and also the effect of frying duration (40, 80 and 120 s) on oil uptake and quality features of deep-fried eggplant. The equations achieved through the examinations revealed that independent variables had significant effect (P < 0.05) on the parameters. Among the studied parameters, vacuum drying was found as the most efficient variable. Moreover, blanching had a significant effect (P < 0.05) on all of the treatments. Although it reduced the oil uptake, caused adverse effects on the quality of the final product such as increasing of shrinkage and colour changes. In conclusion, the optimization of variables showed that samples soaked in 3% sodium chloride solution, dried for 2 hours, and fried for 40 s had the least oil content (1.70 g/1 g of dry matter without oil), moisture content (5.70 g/1 g of dry matter without oil), percentage of shrinkage (32%) and colour changes (ΔE = 25) in comparison with the control sample.
Volume 16, Issue 94 (December 2019)
Abstract
Celiac disease is an autoimmune gastrointestinal disorder that occurs in sensitive individuals upon the consumption of gluten. It is one of the most common genetic abnormalities in the world, which is triggered during the process of digestion of gluten protein and the only way to treat it is to go on a gluten-free diet. The purpose of this research was to apply methods of Response Surface Methodology (RSM) and Central Composite Design (CCD), and to study the effect of independent variables including various concentrations of xanthan gum, guar and carboxymethyl cellulose gum (0, 0.3, and 0.6%) on physicochemical, rheological and organoleptic properties of gluten-free biscuits based on rice flour. The equations achieved through the examinations revealed that independent variables had significant effect (P < 0.05) on the parameters. Among the studied parameters, the effect of xanthan gum concentration was found as the most efficient variable. The results also showed that increasing the concentration of the gum would increase the moisture content, total ash, color changes, and overall acceptability of gluten-free biscuits, while decreasing their hardness and Spread Ratio. In general, the optimization of the researched variables showed that using 0.6% xanthan gum, 0.3% guar gum and 0.13% carboxymethyl cellulose gum would result in production of desirable sample products that would be similar in qualitative characteristics and overall acceptability to the wheat flour biscuits, and could be used for celiac patients’ diet programs.
Volume 16, Issue 97 (March 2020)
Abstract
Barley flour as an active ingredient contains compounds such as beta-glucan, vitamins and significant levels of phenolic compounds, and the usage of barley flour instead of wheat flour can improve the nutritional properties of the products. Therefore, the purpose of this study was to replace the wheat flour with barley flour at levels of 0%, 25%, 50%, 75% and 100%, and to replace sucrose with date liquid sugar at levels of 0%, 50% and 100% in order to produce functional biscuits and to study physicochemical (Moisture, ash, Spread Ratio, color, reducing sugars and pH), rheological, sensory and antioxidant properties of the prepared products. According to the results, the independent variables had a significant effect on the studied factors so that increasing the concentration of barley flour and date liquid sugar in biscuit formulations significantly increased the moisture content, ash, color changes, total phenol and antioxidant effects of the samples, while decreasing the pH and the Fracture strength. In addition, increasing the amount of date liquid sugar and barley flour in the formulation of the samples increased the contents of reducing sugars and dietary fiber in the final product, and decreased the Spread Ratio of the biscuit samples. According to the results, replacing wheat flour with barley flour at levels up to 75% and replacing sugar with date liquid sugar at levels up to 50% had no negative effect on the sensory properties of the samples. Therefore, replacing 75% of wheat flour with Barley flour and 50% of sucrose with date liquid can lead to the production of high-nutrition biscuits with desirable physicochemical, rheological, sensory, and high-antioxidant properties.
Volume 17, Issue 107 (January 2021)
Abstract
Changes in lifestyle and lack of physical activity have led to problems such as obesity, overweight, and hypertension. In this regard, the feasibility of replacing sucrose with isomalt and maltodextrin mixture at different levels (0, 25, 50, 75 and 100%) and its effect on physicochemical, rheological and sensory properties of low-calorie oily cake were investigated. Based on the results, by increasing the ratio of sucrose substitution with mixture of isomalt and maltodextrin, the dough viscosity, water activity, moisture content and color changes of the oily cake samples were increased and the height and calorie of the samples were decreased; also, increasing the mixture ratio of isomalt and maltodextrin resulted in a softer texture of the samples and had no significant effect on the pH of the samples however increasing the replacement level by more than 50% had an adverse effect on the overall acceptance of the samples. Therefore, considering the results obtained, it can be stated that by using mixtureof isomalt and maltodextrin (70 to 30 ratio) up to 50% sucrose content, a product with desirable properties can be obtained.
Volume 17, Issue 107 (January 2021)
Abstract
Cakes, as one of the most widely consumed products in societies, may have some disadvantages such as lack of dietary fibers and high level of sucrose contents. Therefore reduceing sucrose and increasing dietary fiber contents of cake is one of the major challenges for the food industry while retaining its favorable sensory properties. The purpose of this study was to evaluate the feasibility of the production of functional oily cakes containing lemon pomace powder (0, 5 and 10% of wheat flour) and date liquid sugar (0, 25 and 50% sucrose), and to review the effects of the variables on the cake-batter viscosity and physicochemical (moisture content, weight loss, pH, reducing sugars, sucrose, color and fiber content), rheological and sensory properties of oily cakes. According to the results, increasing the use of the lemon pomace powder and the date liquid sugar in cakes would result in increasing and decreasing the viscosity of the cakes respectively. Also, by increasing of the amount of substitution of flour with lemon pomace powder, as well as the substitution of sucrose with date liquid sugar, the levels of moisture content, reducing sugars and dietary fiber in cake-samples increased and the levels of weight loss after baking, pH, sucrose content and firmness of cake-samples decreased. The results also showed that by increasing the concentration of lemon pomace powder and date liquid sugar, the L* parameter of the samples decreased however the a* and b* parameters and the overall color change level of the cake samples increased, so that there was no significant difference in overall acceptabilty between the control sample and those containing 5% lemon pomace powder and 25% date liquid sugar.
Volume 18, Issue 115 (September 2021)
Abstract
Cake batter is a camplen emulsion of air babbles and oil droplets in which the egg plays a key role in foam formation, absorption of air molecules and volume in the cake. However, regular consumption of eggs due to high levels of cholesterol and saturated fatty acids, increases cardiovascular disease and can lead to allergies for some people. Barly aquafaba is a thick liquid obtained form cooking barly, which stabilizes the foam due to significant amounts of active compounds and proteins. The purpose of this study was to investigate the effect of different levels of barly aquafaba (0, 25, 50 and 100%) and xanthan gum (0, 0.25 and 0.5%) as an egg replacer on physical, chemical, rheological and organoleptic properties of oily cake. According to the obtained results, barly aquafaba had an acceptable foaming property due to high protein quality cake samples containing barly aquafaba upto 50% had similar characteristics to control cake samples. However, increasing the replacement of 75 and 100% of eggs with barly aguafaba led to a significant decrease (p<0.05) in physical. Chemical, rheological and sensory properties of eggless cake samples. 0.5% of xanthan gum resulted in improved sensory properties of eggless cake samples, increased moisture content and reduced firmness in the cake samples replaced with 50% barly aquafaba. The results showed that barly aquafaba can be used as a partial replacer for eggs up to 50% while maintaining the sensory, physical and rheological properties if the oily cake.
Volume 18, Issue 116 (October 2021)
Abstract
Cakes, as one of the most widely consumed products in societies, may have some disadvantages such as lack of dietary fibers and high level of sucrose contents. Therefore reducing sucrose and increasing dietary fiber contents of cakes while retaining its favorable sensory properties is one of the major challenges for the food industry. The purpose of this study was to evaluate the feasibility of the production of functional oily cakes containing inulin (0, 2.5, 5 and 7.5% of wheat flour) and grape molasses (0, 20, 40 and 60% sucrose), and to review the effects of the variables on the cake-batter viscosity, physical and chemical (moisture content, weight loss, pH, reducing sugars, sucrose, total ash, color and fiber content), rheological and sensory properties of oily cakes. According to the results, increasing the use of inulin and the grape molasses in cakes would result in increasing and decreasing the viscosity of the cakes respectively. Also, by increasing the amount of substitution of flour with inulin, as well as the substitution of sucrose with grape molasses, the levels of moisture content, reducing sugars, total ash, and dietary fiber in cake-samples were increased and the levels of weight loss after baking, pH, sucrose content and firmness of cake-samples were decreased. The results showed that by increasing the concentration of inulin up to 5%, the L* parameter of the samples were increased and in concentrations above 5% and by increasing the concentration of grape molasses, the L* parameter showed a decreasing trend; Also increasing the concentration of inulin and grape molasses increased the parameter a* and decreased the parameter b* of the samples., so that there was no significant difference in overall acceptability between the control sample and those containing 5% inulin and 40% grape molasses.