scholarly journals Double-Network Hydrogels of Corn Fiber Gum and Soy Protein Isolate: Effect of Biopolymer Constituents and pH Values on Textural Properties and Microstructures

Foods ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 356
Author(s):  
Jinxin Yan ◽  
Xin Jia ◽  
Wenjia Yan ◽  
Lijun Yin
Keyword(s):  
Soy Protein ◽  
Laser Scanning ◽  
Soy Protein Isolate ◽  
Textural Properties ◽  
Protein Isolate ◽  
Laser Scanning Microscopy ◽  
Corn Fiber ◽  
Confocal Laser ◽  
Double Network ◽  
Ph Values

Corn fiber gum (CFG) -soy protein isolate (SPI) double-network (DN) hydrogels were fabricated using laccase and a heat treatment process, in which CFG solution formed the first gel network via laccase oxidation, while SPI formed the second network through heating, as described in our previous research. The aim of this study was to investigate the influences of CFG/SPI constituents (CFG concentration 0–3%, w/v; SPI concentration 8–10%, w/v) and pH values (5.0–7.5) on the textural properties, microstructures and water-holding capacities (WHC) of the CFG-SPI DN hydrogels. Confocal Laser Scanning Microscopy (CLSM) results showed an apparent phase separation when the CFG concentration was above 1% (w/v). The textural characteristics and WHC of most DN hydrogels were enhanced with increasing concentrations of CFG and SPI. Scanning Electron Microscopy (SEM) observations revealed that the microstructures of DN hydrogels were converted from coarse and irregular to smooth and ordered as pH values increased from 5.0 to 7.5. Excellent textural properties and WHC were observed at pH 7.0. This study developed various CFG-SPI DN hydrogels with diverse textures and structures, governed by the concentrations of protein/polysaccharide and pH values, and also contributes to the understanding of gum–protein interactions in DN hydrogels obtained under different conditions.

scholarly journals Nutritional and Rheological Features of Lentil Protein Isolate for Yoghurt-Like Application

Foods ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 1692
Author(s):  
Theresa Boeck ◽  
Emanuele Zannini ◽  
Aylin W. Sahin ◽  
Juergen Bez ◽  
Elke K. Arendt
Keyword(s):  
Laser Scanning ◽  
Base Material ◽  
Small Deformation ◽  
Protein Isolate ◽  
Protein Supplementation ◽  
Water Holding Capacity ◽  
Laser Scanning Microscopy ◽  
Confocal Laser ◽  
Deformation Analysis ◽  
Water Holding

The substitution of animal protein with proteins of plant origin is a viable way to decrease the negative impact caused by animal husbandry on the environment. Pulse consumption has been widely promoted as a nutritious contribution to protein supplementation. In this study, an emulsion of lentil (Lens culinaris) protein isolate is fermented with lactic acid bacteria (LAB) to manufacture a yoghurt alternative and the techno-functional properties compared to a dairy- and a soy-based product with similar protein contents. The yoghurt-like products are subjected to large and small deformation analysis, quantification of fermentable oligosaccharides, disaccharides, monosaccharides and polyols (FODMAP), water holding capacity tests, protein profile analysis and the gel structure is visualised by confocal laser scanning microscopy (CLSM). The lentil yoghurt alternative shows good water holding capacity, high firmness and consistency values in large deformation analysis, with cohesiveness and viscosity not significantly different from that of dairy yoghurt. The high gel strength and rigidity of the lentil yoghurt gels measured by small deformation analysis is well-reflected in the dense protein matrix in the CLSM graphs. FODMAP content of the lentil yoghurt is very low, making it suitable for consumption by irritable bowel syndrome (IBS) patients. Our results show that lentil protein isolate is an excellent base material for producing a plant-based yoghurt alternative.

Extruder Responses, Textural Properties and Color of Meat Analogs Made by High Moisture Soybean Residue and Soy Protein Isolate

2013 ◽  
Vol 781-784 ◽  
pp. 1670-1676 ◽  
Author(s):  
Lan Zhang ◽  
Han Song Yu ◽  
Yao Hui Hu
Keyword(s):  
Soy Protein ◽  
Wheat Gluten ◽  
Soy Protein Isolate ◽  
Textural Properties ◽  
Protein Isolate ◽  
High Moisture ◽  
Soybean Residue ◽  
Cooking Temperature ◽  
Feed Moisture ◽  
Extruded Products

The effect of mixture material with different levels which consisted in soybean residue, soy protein isolate and wheat gluten(0/65/35%-60/5/35%) during high-moisture extrusion, using a laboratory size co-rotating, twin screw food extruder under 50%-60% feed moisture content and 130-150 °C cooking temperature on selected extruder responses, color and textural properties of extruded products was studied. The results show that soybean residue content and feed moisture is negative correlation (r=-0.666 and -0.601) with the hardness of fibrous meat analogs. But cooking temperature has not significant correlation (P>0.05) with the changes of extruder response, color or textural properties of meat analogs.

scholarly journals Extrusion texturization of cricket flour and soy protein isolate: Influence of insect content, extrusion temperature, and moisture‐level variation on textural properties

2020 ◽  
Vol 8 (8) ◽  
pp. 4112-4120
Author(s):  
Samuel M. Kiiru ◽  
John N. Kinyuru ◽  
Beatrice N. Kiage ◽  
Anna Martin ◽  
Anna‐Kristina Marel ◽  
...  
Keyword(s):  
Soy Protein ◽  
Soy Protein Isolate ◽  
Textural Properties ◽  
Protein Isolate ◽  
Moisture Level ◽  
Extrusion Temperature ◽  
Level Variation

scholarly journals A Test Device for Microalgal Antifouling Using Fluctuating pH Values on Conductive Paints

Water ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1597
Author(s):  
Norbert Kamjunke ◽  
Uwe Spohn ◽  
Christian Morig ◽  
Georg Wagner ◽  
Thomas R. Neu
Keyword(s):  
Laser Scanning ◽  
Laser Scanning Microscopy ◽  
Confocal Laser ◽  
Test Device ◽  
Current Dependence ◽  
Ph Values ◽  
Antifouling Coatings ◽  
Biofouling Control ◽  
Further Development ◽  
Algal Biofilms

Due to the current dependence on biocidal antifouling coatings for biofouling control, there is a continuing international challenge to develop more environmentally acceptable antifouling systems. Fluctuating the pH values on paint surfaces is one of these approaches. We developed an antifouling test device to investigate algal biofilms on conductive paints by using a flume with electrochemically working test panels and subsequent confocal laser scanning microscopy (CLSM) of biofilms. By employing a pole reversal of direct current, fluctuating pH values on the paint surface were generated. As a consequence of the resulting pH stress, colonization of the paint surface by diatoms decreased substantially. The density of biofilm algae decreased with increasing pH fluctuations. However, breaks between electrochemical treatments should not exceed one hour. Overall, we established an experimental setup for testing the antifouling capabilities of electrodes based on conductive paints, which could be used for further development of these varnishes.

scholarly journals Application of Response Surface Methodology to Study the Effects of Brisket Fat, Soy Protein Isolate, and Cornstarch on Nutritional and Textural Properties of Rabbit Sausages

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
Joseph M. Wambui ◽  
Edward G. Karuri ◽  
Margaret M. M. Wanyoike
Keyword(s):  
Response Surface Methodology ◽  
Soy Protein ◽  
Soy Protein Isolate ◽  
Textural Properties ◽  
Random Order ◽  
Protein Isolate ◽  
Central Composite Rotatable Design ◽  
Surface Response Methodology ◽  
Central Composite ◽  
Carbohydrate Contents

The effects of brisket fat, soy protein isolate, and cornstarch on chemical and textural properties of rabbit sausages were studied using surface response methodology. Sausage samples were prepared using a five-level three-variable Central Composite Rotatable Design with 16 combinations, including two replicates of the center point, carried out in random order. The level of brisket fat (BF), soy protein isolate (SPI), and cornstarch (CS) in the sausage formulation ranged within 8.3–16.7%, 0.7–2.3%, and 1.3–4.7%, respectively. Increasing BF decreased moisture and ash contents but increased protein and fat contents of the sausages (p<0.05). Increasing SPI increased moisture content but decreased ash and carbohydrate contents of the sausages (p<0.05). Increasing CS increased carbohydrate content (p<0.05). Increasing BF increased hardness, adhesiveness, cohesiveness, and chewiness but decreased springiness (p<0.05). SPI addition increased springiness but decreased adhesiveness, cohesiveness, and chewiness (p<0.05). In conclusion, varying the levels of BF and SPI had a more significant effect on chemical and textural properties of rabbit sausages than CS.

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