Food Engineering
Aliakbar Gholamhosseinpour; Mostafa Mazaheri Tehrani; Seyed Mohammad Ali Razavi
Abstract
UF- Feta cheese is mostly produced from bovine milk and is usually consumed fresh or only after a short period of ripening (60 days). In this research, the influence of commercial starter cultures (SafeIT 2, FRC- 65 and R- 704) and ripening time (0- 60 days) on chemical (total solids, fat, protein, ash, ...
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UF- Feta cheese is mostly produced from bovine milk and is usually consumed fresh or only after a short period of ripening (60 days). In this research, the influence of commercial starter cultures (SafeIT 2, FRC- 65 and R- 704) and ripening time (0- 60 days) on chemical (total solids, fat, protein, ash, salt, acidity, pH), biochemical (pH 4.6, TCA, PTA-soluble nitrogen, acid degree value) and sensory (color and appearance, aroma, texture, flavor and total acceptance) characteristics of UF- Feta cheese analogues was investigated. According to our results, the starter culture types were known to have a significant effect (P≤ 0.05) on pH, %salt, %protein, and pH 4.6- soluble nitrogen of cheeses, whereas the other chemical properties were not affected by them. Ripening time only significantly (P≤ 0.05) influenced %acidity, pH, %salt, acid degree value (meq acid 100 g-1 fat), %protein and %proteolysis products of samples. Also, the starter culture and ripening time did not affect the sensory properties significantly, excluding color and appearance, however, the produced cheeses from SafeIT 2 had higher sensory scores compared with the others containing FRC- 65 and R- 704 cultures.
Aliakbar Gholamhosseinpour; Mostafa Mazaheri Tehrani; Seyed Mohammad Ali Razavi
Abstract
In this study, a mixture of milk protein concentrate, whey protein concentrate, skim milk powder, soymilk, margarine, butter and water was used for production of recombined UF-Feta cheese analogue. Variables were milk protein concentrate (8%, 9%, 10%), whey protein concentrate (0%, 1.5%, 3%), soymilk ...
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In this study, a mixture of milk protein concentrate, whey protein concentrate, skim milk powder, soymilk, margarine, butter and water was used for production of recombined UF-Feta cheese analogue. Variables were milk protein concentrate (8%, 9%, 10%), whey protein concentrate (0%, 1.5%, 3%), soymilk (5%, 10%, 15%) and margarine (0%, 5%, 10%). Textural properties of Samples were analyzed 3 days post-manufacture. The central composite design was employed and the results were modeled and analyzed using response surface methodology. Coefficients of determination, R2, of fitted regression models for different variables were varied in the range of 89.59-97.80 and the lack-of-fit was not significant for all responses at 95%. Hence, the models for all the response variables were highly adequate. The results showed that the optimum processing conditions for producing cheese with suitable hardness and cohesiveness and lowest adhesiveness were: 9.13% milk protein concentrate, 3% whey protein concentrate, 15% soymilk and 7.65% margarine.
Aliakbar Gholamhosseinpour; Mostafa Mazaheri Tehrani; Seyed Mohammad Ali Razavi; Hassan Rashidi
Abstract
In this research, a mixture of MPC, WPC, SMP, Soy milk, Margarine, Butter and water was used for production of UF-Feta cheese analogue.Variables were MPC (8%, 9%, 10%), WPC (0%, 1.5%, 3%), soy milk (5%, 10%, 15%) and margarine (0%, 5%, 10%). Chemical (total solids, protein, acidity) and sensory (color ...
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In this research, a mixture of MPC, WPC, SMP, Soy milk, Margarine, Butter and water was used for production of UF-Feta cheese analogue.Variables were MPC (8%, 9%, 10%), WPC (0%, 1.5%, 3%), soy milk (5%, 10%, 15%) and margarine (0%, 5%, 10%). Chemical (total solids, protein, acidity) and sensory (color and appearance, aroma, texture, flavor, total acceptance) properties of Samples were analyzed 3 days post- manufacture.The central composite design (CCD) was employedand the results were analyzedusing response surface methodology (RSM). Coefficients of determination, R2, of fitted regression models for mentioned variables ranged between 84.94-99.99 and the lack-of-fit was not significant for all response at 95%. Hence, the models for all the response variables were highly adequate.The results showed that the optimum processing conditions for producing cheese with standard total solids and protein content and highest overall values for the sensory properties were: 9.13% MPC, 3% WPC, 15% soy milk and 7.65% margarine.
Aliakbar Gholamhosseinpour; Mostafa Mazaheri Tehrani
Abstract
Today, production of low-fat products is on the rise. There are several ways to produce mentioned products which one of them is the use of fat substitutes. In this research, table cream (30% fat) was used as the basis for production and the effect of milk protein concentrate (MPC) was studied on physicochemical ...
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Today, production of low-fat products is on the rise. There are several ways to produce mentioned products which one of them is the use of fat substitutes. In this research, table cream (30% fat) was used as the basis for production and the effect of milk protein concentrate (MPC) was studied on physicochemical (water holding capacity, apparent viscosity, pH, acidity, fat) and sensory properties of the final product at 0 %, 6 %, 7.2 %, 8.3 %, 9.3 %, 10.2 % and 11.1 % w/w levels. Results indicated that compared to control, acidity and apparent viscosity are significantly increased and fat, water holding capacity and pH are significantly decreased with increasing MPC (P
Aliakbar Gholamhosseinpour; Mohammad Elahi; Mohammad Javad Varidi; Fakhri Shahidi
Abstract
The rock candy is the grown sucrose crystal which has been produced in Iran and India for the first
time originally. In this process, the large sucrose crystals has been produced by cooling the
supersaturated solution. The traditional processing has not changed up to now. Recently, many efforts
were ...
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The rock candy is the grown sucrose crystal which has been produced in Iran and India for the first
time originally. In this process, the large sucrose crystals has been produced by cooling the
supersaturated solution. The traditional processing has not changed up to now. Recently, many efforts
were done to optimize it. The production of rock candy evaluated under cooled crystallization process.
To increase the yield and the growth of sucrose crystals, the supersaturation and crystallization
parameters should be optimized. Due to low efficacy in this procedure, sucrose crystals with
dimensions less than 3 mm are usually produced by evaporating crystallizers. In this research,
traditional production process of rock candy is studied by doing experiments at different phases in a
traditional plant. According to the results, it takes more than 90 min to reach the suitable
supersaturation, an temperature (112°C) and extra evaporation. So the invert sugar content, reach
from 0.015 % in original sugar to 0.571 % in effluent (mother syrup). The produced rock candy has
0.553 % invert sugar. The pH of solution decreases from 7.3 to 5.2, the color increased from 70 (in
primary sugar) to 1240 ICUMSA unit in the effluent and more than 250 Iu in produced rock candy
(measurement in λ = 420nm ). The high color rate and invert sugar cause the effluent can not be used
in production process.
Key words: sucrose, rock candy, crystallization, supersaturation.