scholarly journals Substitusi terigu dengan tepung jagung dan tapioka dalam pembuatan mie instan protein tinggi: kajian dari penambahan soy protein isolate (SPI) dan Na-alginat

Author(s):  
Sukamto Sukamto ◽  
Jemi Arrohman ◽  
Sudiyono Sudiyono

The use of vegetable protein has been developed to increase the protein content of instant noodles. Indonesia is one of the countries that consumes noodles in second place after China. These conditions led to an increase in wheat imports. In an effort to increase the protein content in instant noodles and also reduce the need for wheat, alternative local raw materials are needed to substitute wheat flour. The aim of the study was to utilize tapioca and corn flour as a substitute for wheat flour in the manufacture of instant noodles, which added soybean protein isolate (SPI) and Na-alginate to increase protein content and physical properties. Factorial randomized block design (RBD) was used in this research, factor I was SPI and factor II Na-alginate. The treatment was repeated 3 times. The observational variations were analyzed for variance and continued with the tukey test with α≤ 5% if there was significant. The results showed that the addition of SPI 30% and Na-alginate up to 0.2% increased the protein content of instant noodles to 31.36 ± 0.39% - 34.44 ± 0.34%, water absorption for 5 minutes of cooking was 147 %, cooking time 6.16 ± 0.22 minutes. Overall, the instant noodle is in the category of rather like to like the taste, aroma, color, and texture. Composite flour (corn flour and tapioca) can substitute 50% of wheat flour to produce the instant noodles. The protein contain is 34.44 %, with a contribution of 30% SPI and Na-alginate 0.2%.

2013 ◽  
Vol 469 ◽  
pp. 171-174 ◽  
Author(s):  
Ning Zhang ◽  
Si Yao Sui ◽  
Zhe Wang ◽  
Zhong Su Ma

Edible films were prepared using soy protein isolate (4g/100g), oleic acid (0-2g/100g) and stearic acid (0-2g/100g). Effects of the type and ratio of fatty acids (oleic acid and stearic acid) on the thermal properties of soybean protein isolate-based films were investigated. The results indicated that the addition of oleic acid and stearic acid take a significant effect on the thermal stability of soybean protein isolate-based films, as may attribute to that oleic acid is an amphiphilic substance that interacts with both polar and hydrophobic sites on proteins, thus it could improve the functional properties of the films. Besides, the solid state and hydrophobic nature of stearic acid could help limit water diffusion in the matrix more efficiently when it is well-integrated in the matrix through the surfactant action of oleic acid.


Molecules ◽  
2019 ◽  
Vol 24 (20) ◽  
pp. 3637 ◽  
Author(s):  
Fei Zhao ◽  
Xuemei Liu ◽  
Xiuzhen Ding ◽  
Haizhou Dong ◽  
Wentao Wang

The objective of this study was to investigate the effects of different high-intensity ultrasonication (HIU) pretreatment on the structure and properties of soybean protein isolate (SPI) as well as enzymatic hydrolysis of SPI by bromelain and antioxidant activity of hydrolysates. The HIU-treated SPI fractions showed a decrease in the proportion of α-helices and β-turns and an increase in the content of β-sheets and random coils based on Fourier-transform infrared spectroscopy. Near-infrared spectra and fluorescence spectra analyses provided support for the changes in secondary and tertiary structures of SPI after ultrasound treatment. The particle size of SPI decreased from 217.20 nm to 141.23 nm and the absolute zeta potential increased. Scanning electron microscopy showed that HIU treatment changed apparent morphology. Dynamic and static light scattering of ultrasonicated samples showed that SPI structure had changed from hard-sphere to hollow-sphere or polydisperse and monodisperse gaussian coils. HIU pretreatment significantly increased the hydroxyl-radical scavenging and the degree of hydrolysis of the SPI hydrolysates.


2014 ◽  
Vol 716-717 ◽  
pp. 28-31
Author(s):  
Chao Zhang ◽  
Xiao Fei Guo ◽  
Yue Ma ◽  
Xiao Yan Zhao

The effect of FA and OFA on performances of the soybean protein-isolate/chitosan composite films was evaluated. The FA and OFA enhanced the tensile strength and thermal stability of the composite films significantly, while they reduced the water vapor permeability to 60.3 % and 72.8 % of the control respectively. Moreover, the OFA was more effective to enhance the tensile strength of the composite films than the FA.


2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Zhongjiang Wang ◽  
Yang Li ◽  
Lianzhou Jiang ◽  
Baokun Qi ◽  
Linyi Zhou

This study investigated relationship between secondary structure and surface hydrophobicity of soy protein isolate (SPI) subjected to a thermal treatment at 70~90°C. Heat denaturation increased the surface hydrophobicity and surface hydrophobicity decreased as aggregate formed. Heat caused an increase in the relative amount ofα-helix structures and an overall decrease in the amount ofβ-sheet structures when compared with nontreated SPI. The relative amounts of secondary structures varied with time, temperature, and intensity of heat treatment applied. Theβ-sheet structure was most important for its significant role in denaturation of 7S globulin and following formed aggregates and even in denaturation of 11S globulin. The amount ofβ-sheet structure in SPI had an inverse correlation with the surface hydrophobicity when the temperature was kept below 90°C. Besides,β-turn structure increased asβ-7S/B-11S aggregate formated.


2018 ◽  
Vol 2 (1) ◽  
pp. 1
Author(s):  
Meda Canti ◽  
Sri Anggrahini ◽  
Priyanto Triwitono

The efforts to diversify food products can be done by substitution of wheat flour with corn flour on instant noodle. Protein content of corn flour is low, so it is added with mungbean flour. The aim of this research was to increase protein content of instant noodle by substitution of corn flour with addition of 0-20% mungbean flour and to evaluate the physical, sensory and chemical properties of instant noodles. This study was preceded by a reduction phytate content on mungbean flour with boiling and soaking. Ratio of wheat flour and corn flour as control of 8:2. The addition of mungbean flour of 0%, 5%, 10%, 15% and 20%. Instant noodles were analyzed for physical, sensory and chemical properties. The result show that boiling treatment of mungbean decreased the phytate content higher than soaking treatment. Rehydration capacity, expansion ratio, flavor, elasticity of instant noodles with added of soaked mungbean flour of 5-20% and boiled mungbean flour of 5-10% same as control instant noodles. Instant noodle with added of soaked mungbean flour of 20% was able to increase protein content 1.38 fold with protein content 13.14% db, while with added of boiled mungbean flour of 10% was able to increase protein content 1.13 fold with protein content 10.82% db. Keywords : instant noodle; wheat flour; corn; mung bean; protein


2010 ◽  
Vol 658 ◽  
pp. 125-128 ◽  
Author(s):  
Yan Lu ◽  
Xue Gang Luo ◽  
Xiao Yan Lin ◽  
Pan He

A soybean protein isolate (SPI) main chain grafted with methyl acrylate (MA) and methyl methacrylate (MMA) as a new thermoplastic copolymer (T-SPI) was prepared. The properties of the material were evaluated with DSC, FT-IR, and rotary rheometry. The results indicated that the monomer was grafted on SPI successfully. The T-SPI had a glass transition at about 66°C. T-SPI was a typical viscoelastic material, and its elastic ratio was 65.27%, the shear viscosity was very sensitive to temperature and the flowability of T-SPI was regulated by temperature.


2014 ◽  
Vol 716-717 ◽  
pp. 24-27 ◽  
Author(s):  
Chao Zhang ◽  
Xiao Fei Guo ◽  
Yue Ma ◽  
Xiao Yan Zhao

The effect of ferulic acid (FA) and oxidized ferulic acid (OFA) on performances of the soybean protein-isolate/chitosan composite films was evaluated. The FA and OFA showed an excellent compatibility and miscibility of in the composite films, and leaded the surface more compact and smooth. The FA and OFA also enhanced the thermal stability of the composite films. The FA and OFA enhanced the performance of the composite films by raising the band energy of the crosslinked molecules.


Foods ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 667
Author(s):  
Chenxiao Wang ◽  
Hao Yin ◽  
Yanyun Zhao ◽  
Yan Zheng ◽  
Xuebing Xu ◽  
...  

This work aimed to improve the functional properties of soybean protein isolate (SPI) by high hydrostatic pressure (HHP) and develop SPI incorporated yogurt. Response surface methodology (RSM) was used to optimize the HHP treatment parameters, including pressure, holding time, and the ratio of SPI/water. Water holding capacity, emulsifying activity index, solubility, and hardness of SPI gels were evaluated as response variables. The optimized HPP treatment conditions were 281 MPa of pressure, 18.92 min of holding time, and 1:8.33 of SPI/water ratio. Water and oil holding capacity, emulsifying activity, and stability of SPI at different pH were improved. Additionally, relative lipoxygenase (LOX) activity of HHP treated SPI (HHP-SPI) was decreased 67.55 ± 5.73%, but sulphydryl group content of HHP-SPI was increased 12.77%, respectively. When incorporating 8% of SPI and HHP-SPI into yogurt, the water holding capacity and rheological properties of yogurt were improved in comparison with yogurt made of milk powders. Moreover, HHP-SPI incorporated yogurt appeared better color and flavor.


Sign in / Sign up

Export Citation Format

Share Document