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Huang X, Wang S, Zhang M, Zhang G, Zhang Z, Cao X, Liu H. Enhancing frozen dough quality: Investigating the impact of soy hull polysaccharide (SHP) on rheological properties and microstructure. Food Chem 2024; 454:139853. [PMID: 38823200 DOI: 10.1016/j.foodchem.2024.139853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Revised: 05/21/2024] [Accepted: 05/24/2024] [Indexed: 06/03/2024]
Abstract
The effects of SHP on the texture, rheological properties, starch crystallinity and microstructure of frozen dough were investigated. The efficacy of SHP in enhancing dough quality is concentration-dependent, with frozen dough containing 1.5% SHP exhibiting hardness comparable to fresh dough without SHP (221.31 vs. 221.42 g). Even at 0.5% SHP, there is a noticeable improvement in frozen dough quality. The rheological results showed that the viscoelasticity of dough increased with higher SHP concentration. What's more, XRD and SEM results indicated that the SHP's hydrophilicity reduces the degree of starch hydrolysis, slows down the damage of starch particles during freezing, and consequently lowers the crystallinity of starch. Additionally, CLSM observations revealed that SHP enhances the gluten network structure, diminishing the appearance of holes. Therefore, the physical, chemical properties, and microstructure of frozen dough with SHP demonstrate significant enhancement, suggesting SHP's promising antifreeze properties and potential as a food antifreeze agent.
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Affiliation(s)
- Xueying Huang
- College of Food Science and Technology, Bohai University, Jinzhou, 121013, China
| | - Shengnan Wang
- College of Food Science and Technology, Bohai University, Jinzhou, 121013, China; Grain and Cereal Food Bio-efficient Transformation Engineering Research Center of Liaoning Province, Jinzhou, 121013, China.
| | - Minghao Zhang
- College of Food Science and Technology, Bohai University, Jinzhou, 121013, China
| | - Guangchen Zhang
- College of Food Science and Technology, Bohai University, Jinzhou, 121013, China
| | - Ziyang Zhang
- College of Food Science and Technology, Bohai University, Jinzhou, 121013, China
| | - Xiuzhi Cao
- College of Food Science and Technology, Bohai University, Jinzhou, 121013, China
| | - He Liu
- College of Food Science and Technology, Bohai University, Jinzhou, 121013, China; Grain and Cereal Food Bio-efficient Transformation Engineering Research Center of Liaoning Province, Jinzhou, 121013, China
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2
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Almeida RLJ, Santos NC, Morais JRF, de Almeida Mota MM, da Silva Eduardo R, Muniz CES, de Assis Cavalcante J, da Costa GA, de Almeida Silva R, de Oliveira BF, da Silva Negreiros JK, da Silva PB, Albuquerque JC, de Figueiredo MJ, Lima SER. Effect of freezing rates on α-amylase enzymatic susceptibility, in vitro digestibility, and technological properties of starch microparticles. Food Chem 2024; 453:139688. [PMID: 38761722 DOI: 10.1016/j.foodchem.2024.139688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 04/30/2024] [Accepted: 05/13/2024] [Indexed: 05/20/2024]
Abstract
The aim of this study was to evaluate the effect of freezing rates using direct (LF: Liquid nitrogen) and indirect (RF: Cryogenic refrigerator and UF: ultra-freezer) methods at temperatures of (-20, -80, and - 196 °C) on the enzymatic susceptibility with α-amylase for microparticles. In vitro digestibility parameters and technological properties were also analyzed. Lower rates resulted in larger ice crystals, damaging the starch structure. Hydrolysis was more pronounced at slower rates RF: 0.07 °C/min and UF: 0.14 °C/min, yielding maximum values of RDS: 37.63% and SDS: 59.32% for RF. Type A crystallinity remained unchanged, with only a noted increase in crystallinity of up to 6.50% for FR. Starch pastes were classified as pseudoplastic, with RF exhibiting superior textural parameters and apparent viscosity. (RF: 7.18 J g-1 and UF: 7.34 J g-1) also showed lower values of gelatinization enthalpy. Freezing techniques were viable in facilitating the diffusion of α-amylase and reducing RS by up to 81%.
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Affiliation(s)
| | - Newton Carlos Santos
- Department of Food Engineering, Federal University of Campina Grande, Campina Grande, PB, Brazil
| | | | | | - Raphael da Silva Eduardo
- Department of Chemical Engineering, Federal University of Campina Grande, Campina Grande, PB, Brazil
| | - Cecilia Elisa Sousa Muniz
- Department of Chemical Engineering, Federal University of Campina Grande, Campina Grande, PB, Brazil
| | | | | | | | | | | | | | - Juliana Cruz Albuquerque
- Department of Agricultural Engineering, Federal University of Campina Grande, Campina Grande, PB, Brazil
| | - Maria José de Figueiredo
- Department of Agro-industrial Management and Technology, Federal University of Paraiba, Bananeiras, PB, Brazil
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3
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Zhang F, Guo J, Li P, Zhao F, Yang X, Cheng Q, Elmore JS, Wang P, Cui C. Effects of different thawing methods on physical and physicochemical properties of frozen dough and quality of corresponding steamed bread. Food Chem 2024; 447:138932. [PMID: 38484546 DOI: 10.1016/j.foodchem.2024.138932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 02/20/2024] [Accepted: 03/01/2024] [Indexed: 04/10/2024]
Abstract
The thawing method is critical for the final quality of products based on the frozen dough. The effects of ultrasound thawing, proofer thawing, refrigerator thawing, water bath thawing, ambient thawing, and microwave thawing on the rheology, texture, water distribution, fermentation characteristics, and microstructure of frozen dough and the properties of steamed bread were investigated. The results indicated that the ultrasound thawing dough had better physicochemical properties than other doughs. It was found that ultrasound thawing restrained the water migration of dough, improved its rheological properties and fermentation capacity. The total gas volume value of the ultrasound thawing dough was reduced by 21.35% compared with that of unfrozen dough. The ultrasound thawing dough displayed a thoroughly uniform starch-gluten network, and an enhanced the specific volume and internal structure of the steamed bread. In conclusion, ultrasound thawing effectively mitigated the degradation of the frozen dough and enhanced the quality of steamed bread.
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Affiliation(s)
- Fan Zhang
- College of Food and Bioengineering, Henan University of Science and Technology, Luoyang 471023, Henan Province, PR China
| | - Jinying Guo
- College of Food and Bioengineering, Henan University of Science and Technology, Luoyang 471023, Henan Province, PR China.
| | - Peiyao Li
- College of Food and Bioengineering, Henan University of Science and Technology, Luoyang 471023, Henan Province, PR China
| | - Fen Zhao
- College of Food and Bioengineering, Henan University of Science and Technology, Luoyang 471023, Henan Province, PR China
| | - Xue Yang
- College of Food and Bioengineering, Henan University of Science and Technology, Luoyang 471023, Henan Province, PR China
| | - Qiaofen Cheng
- Department of Food and Nutritional Sciences, University of Reading, Whiteknights, Reading RG6 6DZ, UK
| | - J Stephen Elmore
- Department of Food and Nutritional Sciences, University of Reading, Whiteknights, Reading RG6 6DZ, UK
| | - Ping Wang
- College of Food and Bioengineering, Henan University of Science and Technology, Luoyang 471023, Henan Province, PR China
| | - Can Cui
- College of Food and Bioengineering, Henan University of Science and Technology, Luoyang 471023, Henan Province, PR China
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Liu Z, Hu X, Lu S, Xu B, Bai C, Ma T, Song Y. Applications of physical and chemical treatments in plant-based gels for food 3D printing. J Food Sci 2024. [PMID: 38829741 DOI: 10.1111/1750-3841.17101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 03/11/2024] [Accepted: 04/12/2024] [Indexed: 06/05/2024]
Abstract
Extrusion-based three-dimensional (3D) printing has been extensively studied in the food manufacturing industry. This technology places particular emphasis on the rheological properties of the printing ink. Gel system is the most suitable ink system and benefits from the composition of plant raw materials and gel properties of multiple components; green, healthy aspects of the advantages of the development of plant-based gel system has achieved a great deal of attention. However, the relevant treatment technologies are still only at the laboratory stage. With a view toward encouraging further optimization of ink printing performance and advances in this field, in this review, we present a comprehensive overview of the application of diverse plant-based gel systems in 3D food printing and emphasize the utilization of different treatment methods to enhance the printability of these gel systems. The treatment technologies described in this review are categorized into three distinct groups, physical, chemical, and physicochemical synergistic treatments. We comprehensively assess the specific application of these technologies in various plant-based gel 3D printing systems and present valuable insights regarding the challenges and opportunities for further advances in this field.
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Affiliation(s)
- Zhihao Liu
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
- National Engineering Research Center for Fruits and Vegetable Processing, Beijing, China
- Key Laboratory of Fruits and Vegetable Processing, Ministry of Agriculture and Rural Affairs, Beijing, China
- Beijing Key Laboratory for Food Nonthermal Processing, Beijing, China
| | - Xinna Hu
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
- National Engineering Research Center for Fruits and Vegetable Processing, Beijing, China
- Key Laboratory of Fruits and Vegetable Processing, Ministry of Agriculture and Rural Affairs, Beijing, China
- Beijing Key Laboratory for Food Nonthermal Processing, Beijing, China
| | - Shuyu Lu
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
- National Engineering Research Center for Fruits and Vegetable Processing, Beijing, China
- Key Laboratory of Fruits and Vegetable Processing, Ministry of Agriculture and Rural Affairs, Beijing, China
- Beijing Key Laboratory for Food Nonthermal Processing, Beijing, China
| | - Bo Xu
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
- National Engineering Research Center for Fruits and Vegetable Processing, Beijing, China
- Key Laboratory of Fruits and Vegetable Processing, Ministry of Agriculture and Rural Affairs, Beijing, China
- Beijing Key Laboratory for Food Nonthermal Processing, Beijing, China
| | - Chenyu Bai
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
- National Engineering Research Center for Fruits and Vegetable Processing, Beijing, China
- Key Laboratory of Fruits and Vegetable Processing, Ministry of Agriculture and Rural Affairs, Beijing, China
- Beijing Key Laboratory for Food Nonthermal Processing, Beijing, China
| | - Tao Ma
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
- National Engineering Research Center for Fruits and Vegetable Processing, Beijing, China
- Key Laboratory of Fruits and Vegetable Processing, Ministry of Agriculture and Rural Affairs, Beijing, China
- Beijing Key Laboratory for Food Nonthermal Processing, Beijing, China
| | - Yi Song
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
- National Engineering Research Center for Fruits and Vegetable Processing, Beijing, China
- Key Laboratory of Fruits and Vegetable Processing, Ministry of Agriculture and Rural Affairs, Beijing, China
- Beijing Key Laboratory for Food Nonthermal Processing, Beijing, China
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He N, Xia M, Zhang X, He M, Li L, Li B. Quality attributes and functional properties of whole wheat bread baked from frozen dough with the addition of enzymes and hydrocolloids. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2024; 104:1928-1941. [PMID: 37932850 DOI: 10.1002/jsfa.13077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2023] [Revised: 10/18/2023] [Accepted: 10/23/2023] [Indexed: 11/08/2023]
Abstract
BACKGROUND The increased demand for healthy and standardized bread has led to a demand for an efficient and promising dough improver, of natural origin, to reduce the deterioration of whole wheat bread baked from frozen dough caused by the high levels of dietary fiber and by freezing treatment. In this study, the combined effects of xylanase (XYL), lipase (LIP), and xanthan gum (XAN) on the quality attributes and functional properties of whole wheat bread baked from frozen dough were evaluated. RESULTS The optimal combination, which contained XYL (0.12 g kg-1 ), LIP (0.25 g kg-1 ), and XAN (3.1 g kg-1 ), was obtained using response surface methodology (RSM). The addition of the optimal combination endowed frozen dough bread with a higher specific volume, softer texture, better brown crumb color, and greater overall acceptability. The optimal combination had no adverse impact on the volatile organic compounds (VOCs) of frozen dough bread. In terms of the functional properties of bread, the water-holding capacity (WHC), oil-holding capacity (OHC), and swelling capacity (SWC) of dietary fiber in frozen dough bread decreased in the presence of the optimal combination, whereas the glucose adsorption capacity (GAC) did not affect them. Correspondingly, the in vitro digestive glucose release was not significantly different between the control group and the optimal combination group after frozen storage. CONCLUSION The optimal combination could improve the quality attributes and functional properties of whole wheat bread baked from frozen dough effectively, thereby increasing consumption. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Ni He
- Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, School of Food Science and Engineering, South China University of Technology, Guangzhou, China
| | - Mingwei Xia
- Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, School of Food Science and Engineering, South China University of Technology, Guangzhou, China
| | - Xia Zhang
- Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, School of Food Science and Engineering, South China University of Technology, Guangzhou, China
| | - Min He
- Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, School of Food Science and Engineering, South China University of Technology, Guangzhou, China
| | - Lin Li
- Food Chemistry and Technology, College of Oceanology and Food Science, Quanzhou Normal University, Quanzhou, China
| | - Bing Li
- Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, School of Food Science and Engineering, South China University of Technology, Guangzhou, China
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6
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Liu S, Gu S, Shi Y, Chen Q. Alleviative effects of mannosylerythritol lipid-A on the deterioration of internal structure and quality in frozen dough and corresponding steamed bread. Food Chem 2024; 431:137122. [PMID: 37573742 DOI: 10.1016/j.foodchem.2023.137122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 07/17/2023] [Accepted: 08/07/2023] [Indexed: 08/15/2023]
Abstract
The effects of mannosylerythritol lipid-A (MEL-A) on the quality of frozen dough and corresponding steamed bread were investigated. The results revealed that the rheological properties of frozen dough were improved with the increment of MEL-A (0%-2.0%). Adding 1.5% and 2% MEL-A significantly reduced the moisture migration and enhanced the water-holding capacity of the frozen dough. Microstructure observation demonstrated that high levels of MEL-A enabled more starch granules to be embedded in the dough network. A series of product quality assessments illustrated that frozen dough steamed bread containing 2.0% of MEL-A had the largest specific volume (2.981 mL/g), the highest springiness (77.47%), more uniform and porous crumb structure. Moreover, MEL-A exhibited a positive effect on steamed bread's flavor profile, which was explored for the first time in this study. Hence, these results suggested that MEL-A has promising applications as a novel dough improver in the food industry.
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Affiliation(s)
- Siyu Liu
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China; Future Food Laboratory, Innovation Center of Yangtze River Delta, Zhejiang University, Jiaxing 314102, China
| | - Simin Gu
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Ying Shi
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Qihe Chen
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China; Future Food Laboratory, Innovation Center of Yangtze River Delta, Zhejiang University, Jiaxing 314102, China.
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7
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Zeng F, Hu Z, Yang Y, Jin Z, Jiao A. Regulation of baking quality and starch digestibility in whole wheat bread based on β-glucans and protein addition strategy: Significance of protein-starch-water interaction in dough. Int J Biol Macromol 2024; 256:128021. [PMID: 37967598 DOI: 10.1016/j.ijbiomac.2023.128021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 11/08/2023] [Accepted: 11/09/2023] [Indexed: 11/17/2023]
Abstract
Whole wheat bread has high nutritional value but is characterized by inferior quality and a high glycemic index. Studies have shown that adding β-glucans and protein can improve bread quality. This study investigated the effects of added oat β-glucan, barley β-glucan, or yeast β-glucan on protein synergy and whole wheat dough and bread quality. The mixing properties, rheological properties, and scanning electron microscopy observations showed that the addition of β-glucan promoted the formation of gluten networks, while the synergy between the wheat proteins and β-glucan resulted in a more robust and stable gluten network and a stronger physical starch envelope. Rapid visco-analysis and thermal property evaluations showed that β-glucan addition inhibited the thermal degradation, gelatinization, and retrogradation of starch. Based on the bread quality results, it was found the β-glucan could cause some damage to the bread baking quality. For example, the hardness of samples with oats, barley, and yeast increased to 881.69 g, 952.97 g, and 631.75 g, respectively, compared to samples without β-glucan (317.49 g), whereas the inclusion of yeast β-glucan proved to be less detrimental. Protein and β-glucan both reduced starch digestion to some degree, and showed better synergistic effects, with the lowest estimated glycemic index of 70.08 observed in bread containing added yeast β-glucan and protein. Therefore, yeast β-glucan and protein mixtures could be selected as viable formulations for enhancing the quality of whole wheat bread.
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Affiliation(s)
- Fangye Zeng
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi 214122, PR China; School of Food Science and Technology, Jiangnan University, Wuxi 214122, PR China
| | - Zhongbo Hu
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi 214122, PR China; School of Food Science and Technology, Jiangnan University, Wuxi 214122, PR China
| | - Yueyue Yang
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi 214122, PR China; School of Food Science and Technology, Jiangnan University, Wuxi 214122, PR China
| | - Zhengyu Jin
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi 214122, PR China; School of Food Science and Technology, Jiangnan University, Wuxi 214122, PR China
| | - Aiquan Jiao
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi 214122, PR China; School of Food Science and Technology, Jiangnan University, Wuxi 214122, PR China.
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Xie X, Chen J, Cheng L, Zhang B, Zhu H, Xu C, Liang D. Physicochemical properties of different size fractions of potato starch cultivated in Highland China. Int J Biol Macromol 2024; 256:128065. [PMID: 37963508 DOI: 10.1016/j.ijbiomac.2023.128065] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 10/21/2023] [Accepted: 11/10/2023] [Indexed: 11/16/2023]
Abstract
Location influences the properties of potato starch. Potato starch granules cultivated in highland of China were separated into three fractions according to the sedimentation time: large- (∼81 μm, large fraction potato starch, LFPS), medium- (∼28 μm, medium fraction potato starch, MFPS), and small-size (∼15 μm, small fraction potato starch, SFPS) fractions. SFPS showed a spherical shape, MFPS showed an ellipsoid shape and LFPS showed an elongated shape. The three fractions showed the similar XRD patterns, while the relative crystallinity decreased with the decrease of granule size (LFPS 23.61%, MFPS 20.74% and SFPS 20.48%). The water solubility was positively corelated with the granule size, while the swelling power showed a negative relationship with the granule size. For the rheological properties, all the three fractions showed a shear-shinning behavior; and SFPS had the highest peak temperature. However, the MFPS showed the lowest storage modulus during the temperature sweep. The granule size didn't influence the nutritional properties of potato starch and LFPS had the highest slowly digestible starch (SDS) (83.77%) and resistant starch (RS) (13.66%) contents. Some of the properties are different from the previous studies.
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Affiliation(s)
- Xinhua Xie
- College of Food Science and Technology, Henan Agricultural University, Zhengzhou 450002, Henan, China; Key Laboratory of Staple Grain Processing, Ministry of Agriculture and Rural Affairs, Zhengzhou 450002, Henan, China; National R&D Center for Frozen Rice & Wheat Products Processing Technology, Henan Engineering Laboratory of Quick-Frozen Flour-Rice Food and Prepared Food, Henan Agricultural University, Zhengzhou 450002, Henan, China
| | - Jianyang Chen
- College of Food Science and Technology, Henan Agricultural University, Zhengzhou 450002, Henan, China; Key Laboratory of Staple Grain Processing, Ministry of Agriculture and Rural Affairs, Zhengzhou 450002, Henan, China
| | - Lilin Cheng
- College of Food Science and Technology, Henan Agricultural University, Zhengzhou 450002, Henan, China; Key Laboratory of Staple Grain Processing, Ministry of Agriculture and Rural Affairs, Zhengzhou 450002, Henan, China; National R&D Center for Frozen Rice & Wheat Products Processing Technology, Henan Engineering Laboratory of Quick-Frozen Flour-Rice Food and Prepared Food, Henan Agricultural University, Zhengzhou 450002, Henan, China.
| | - Bobo Zhang
- College of Food Science and Technology, Henan Agricultural University, Zhengzhou 450002, Henan, China; Key Laboratory of Staple Grain Processing, Ministry of Agriculture and Rural Affairs, Zhengzhou 450002, Henan, China; National R&D Center for Frozen Rice & Wheat Products Processing Technology, Henan Engineering Laboratory of Quick-Frozen Flour-Rice Food and Prepared Food, Henan Agricultural University, Zhengzhou 450002, Henan, China
| | - Hongshuai Zhu
- College of Food Science and Technology, Henan Agricultural University, Zhengzhou 450002, Henan, China; Key Laboratory of Staple Grain Processing, Ministry of Agriculture and Rural Affairs, Zhengzhou 450002, Henan, China; National R&D Center for Frozen Rice & Wheat Products Processing Technology, Henan Engineering Laboratory of Quick-Frozen Flour-Rice Food and Prepared Food, Henan Agricultural University, Zhengzhou 450002, Henan, China
| | - Chao Xu
- College of Food Science and Technology, Henan Agricultural University, Zhengzhou 450002, Henan, China; Key Laboratory of Staple Grain Processing, Ministry of Agriculture and Rural Affairs, Zhengzhou 450002, Henan, China; National R&D Center for Frozen Rice & Wheat Products Processing Technology, Henan Engineering Laboratory of Quick-Frozen Flour-Rice Food and Prepared Food, Henan Agricultural University, Zhengzhou 450002, Henan, China
| | - Dan Liang
- College of Food Science and Technology, Henan Agricultural University, Zhengzhou 450002, Henan, China; Key Laboratory of Staple Grain Processing, Ministry of Agriculture and Rural Affairs, Zhengzhou 450002, Henan, China; National R&D Center for Frozen Rice & Wheat Products Processing Technology, Henan Engineering Laboratory of Quick-Frozen Flour-Rice Food and Prepared Food, Henan Agricultural University, Zhengzhou 450002, Henan, China
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9
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Xia R, Fu M, Wang Z, Cheng W, Wu D, Tang X, Yang P. Effects of frozen storage on the quality characteristics of frozen whole buckwheat extruded noodles. Food Chem 2023; 429:136856. [PMID: 37459711 DOI: 10.1016/j.foodchem.2023.136856] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Revised: 07/06/2023] [Accepted: 07/09/2023] [Indexed: 08/24/2023]
Abstract
The effects of frozen storage (-18 °C, 180 days) on the quality of frozen whole buckwheat extruded noodles (FWBEN) were investigated. The water content of FWBEN decreased, while the reheating time, water absorption, and dry consumption rate increased with prolonged storage time. Cooking loss increased from 3.20% to 4.31%. Texture analysis indicated that the hardness initially increased, then decreased. Microstructure results showed that the starch gel structure was damaged to a certain extent after storage for a longer period of time, whereas the porous structure became non-uniform with the appearance of cracks. The relative crystallinity gradually increased, and the freezable water content decreased with prolonged storage. These results demonstrated that FWBEN quality was affected by starch retrogradation and ice recrystallization. In general, FWBEN quality was relatively stable during 180 days of frozen storage at -18 °C.
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Affiliation(s)
- Ruhui Xia
- College of Food Science and Engineering/Collaborative Innovation Center for Modern Grain Circulation and Safety/Key Laboratory of Grains and Oils Quality Control and Processing, Nanjing University of Finance and Economics, Nanjing 210023, China
| | - Meixia Fu
- College of Food Science and Engineering/Collaborative Innovation Center for Modern Grain Circulation and Safety/Key Laboratory of Grains and Oils Quality Control and Processing, Nanjing University of Finance and Economics, Nanjing 210023, China
| | - Zhenjiong Wang
- College of Food Science and Engineering/Collaborative Innovation Center for Modern Grain Circulation and Safety/Key Laboratory of Grains and Oils Quality Control and Processing, Nanjing University of Finance and Economics, Nanjing 210023, China
| | - Weiwei Cheng
- College of Food Science and Engineering/Collaborative Innovation Center for Modern Grain Circulation and Safety/Key Laboratory of Grains and Oils Quality Control and Processing, Nanjing University of Finance and Economics, Nanjing 210023, China
| | - Di Wu
- College of Food Science and Engineering/Collaborative Innovation Center for Modern Grain Circulation and Safety/Key Laboratory of Grains and Oils Quality Control and Processing, Nanjing University of Finance and Economics, Nanjing 210023, China.
| | - Xiaozhi Tang
- College of Food Science and Engineering/Collaborative Innovation Center for Modern Grain Circulation and Safety/Key Laboratory of Grains and Oils Quality Control and Processing, Nanjing University of Finance and Economics, Nanjing 210023, China.
| | - Peiqiang Yang
- Suzhou Niumag Analytical Instrument Corporation, Suzhou 215151, China
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10
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Zeng F, Yang Y, Liu Q, Yang J, Jin Z, Jiao A. Effect of fermentation methods on properties of dough and whole wheat bread. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2023; 103:4876-4886. [PMID: 36943926 DOI: 10.1002/jsfa.12565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 03/10/2023] [Accepted: 03/21/2023] [Indexed: 06/08/2023]
Abstract
BACKGROUND Whole wheat bread is high in nutritional value but poor in technological quality; therefore, research on how to improve its technological quality has attracted extensive attention. The effects of fermentation methods, including straight dough(STD), sourdough (SOD), sponge dough (SPD), and refrigerated SPD (RSD) methods, on the dough and bread quality of whole wheat bread were investigated, focusing on pasting properties, rheological properties, thermal properties, microstructure, basic quality, and starch digestibility. RESULTS The rapid viscosity analysis and rheological results demonstrated that SOD had the highest pasting temperature and the lowest viscosity, indicating an inhibition of starch pasting and partial protein hydrolysis, whereas the opposite trend presented by SPD and RSD indicated a greater starch hydration and a stronger gluten network. Thermal gravimetric analysis and differential scanning calorimetry results indicated reduced starch thermal degradation and increased starch pasting enthalpy in SOD and RSD. Scanning electron microscopy images revealed that the starch granules of SOD and RSD were tightly wrapped by a gluten network. SOD and RSD breads had the largest specific volume, the softest texture, and the lowest glycemic index. CONCLUSION The effects of different fermentation methods on dough and bread structure can provide instructive information for future studies on their applications in whole wheat bread production. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Fangye Zeng
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, PR China
- School of Food Science and Technology, Jiangnan University, Wuxi, PR China
| | - Yueyue Yang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, PR China
- School of Food Science and Technology, Jiangnan University, Wuxi, PR China
| | - Qing Liu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, PR China
- School of Food Science and Technology, Jiangnan University, Wuxi, PR China
| | - Jiahua Yang
- Jiangsu Pastoral Health Technology Co., Ltd, Taizhou, PR China
| | - Zhengyu Jin
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, PR China
- School of Food Science and Technology, Jiangnan University, Wuxi, PR China
| | - Aiquan Jiao
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, PR China
- School of Food Science and Technology, Jiangnan University, Wuxi, PR China
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11
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Wei Q, Zhang G, Mei J, Zhang C, Xie J. Optimization of freezing methods and composition of frozen rice dough reconstituted by glutinous rice starch and gluten. Int J Biol Macromol 2023; 240:124424. [PMID: 37060979 DOI: 10.1016/j.ijbiomac.2023.124424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2022] [Revised: 03/15/2023] [Accepted: 04/08/2023] [Indexed: 04/17/2023]
Abstract
This study investigated the effects of four different freezing methods on the texture of rice dough reconstituted by glutinous rice starch and gluten, and the changes of properties of rice dough with different gluten ratios after liquid nitrogen (LF) treatment. The profiles of frozen rice dough were studied by texture analyzer, low-field NMR, SEM, FT-IR, DSC, CLSM, X-RD and RVA. Results revealed that with the slowing down of freezing rate, the damage of freezing process to starch granules and protein structure in frozen rice dough increases, resulting in the increase of damaged starch, the decrease of protein ordered structure, the change of bound water in frozen rice dough to free water, the decrease of frozen rice dough hardness and elasticity, the decrease of storage modulus (G') and the deterioration of frozen rice dough texture. The addition of gluten in frozen rice dough will increase the short-range ordered structure and crystal structure of starch, reduce the digestibility of starch, and change the viscosity characteristics of frozen rice dough. Based on the experimental results, adding 10 % gluten is more suitable for making frozen rice dough, while LF has the least effect on frozen rice dough texture.
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Affiliation(s)
- Qi Wei
- College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China; National Experimental Teaching Demonstration Center for Food Science and Engineering Shanghai Ocean University, Shanghai 201306, China; Shanghai Engineering Research Center of Aquatic Product Processing and Preservation, Shanghai 201306, China; Shanghai Professional Technology Service Platform on Cold Chain Equipment Performance and Energy Saving Evaluation, Shanghai 201306, China.
| | - Ge Zhang
- Wilmar (Shanghai) Biotechnology Research & Development Center Co., Ltd, Area A, No.118 Gaodong Road, Pudong New District, Shanghai 200137, China.
| | - Jun Mei
- College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China; National Experimental Teaching Demonstration Center for Food Science and Engineering Shanghai Ocean University, Shanghai 201306, China; Shanghai Engineering Research Center of Aquatic Product Processing and Preservation, Shanghai 201306, China; Shanghai Professional Technology Service Platform on Cold Chain Equipment Performance and Energy Saving Evaluation, Shanghai 201306, China.
| | - Chenchen Zhang
- College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China; National Experimental Teaching Demonstration Center for Food Science and Engineering Shanghai Ocean University, Shanghai 201306, China; Shanghai Engineering Research Center of Aquatic Product Processing and Preservation, Shanghai 201306, China; Shanghai Professional Technology Service Platform on Cold Chain Equipment Performance and Energy Saving Evaluation, Shanghai 201306, China.
| | - Jing Xie
- College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China; National Experimental Teaching Demonstration Center for Food Science and Engineering Shanghai Ocean University, Shanghai 201306, China; Shanghai Engineering Research Center of Aquatic Product Processing and Preservation, Shanghai 201306, China; Shanghai Professional Technology Service Platform on Cold Chain Equipment Performance and Energy Saving Evaluation, Shanghai 201306, China; Collaborative Innovation Center of Seafood Deep Processing, Ministry of Education, Dalian 116034, China.
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12
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Quantitative analysis perspective: Ice growth and super-chilling state of frozen dough under quick freezing. Lebensm Wiss Technol 2023. [DOI: 10.1016/j.lwt.2023.114652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2023]
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13
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dongdong X, xing L, yingqi S, shuncheng R. Effect of different producing methods on physicochemical and fermentation properties of refrigerated dough. J Food Compost Anal 2023. [DOI: 10.1016/j.jfca.2023.105268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023]
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14
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Duan X, Guan Y, Dong H, Yang M, Chen L, Zhang H, Naeem A, Zhu W. Study on structural characteristics and physicochemical properties of starches extracted from three varieties of kudzu root (Pueraria lobata starch). J Food Sci 2023; 88:1048-1059. [PMID: 36704896 DOI: 10.1111/1750-3841.16472] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 12/18/2022] [Accepted: 12/26/2022] [Indexed: 01/28/2023]
Abstract
Kudzu root (Pueraria lobata) is well known for its traditional use as a medicinal food homologous plant in China. Three varieties of kudzu roots, such as Gange-1, Gange-2, and Gange-6, are commonly used. Nowadays, kudzu starch (KS) is commercially available as satiating foods or product ingredients. Differentiation and selection of the variety are important components of quality control for KS-based products. Thus, the present work was aimed at comparing the physicochemical properties, such as thermodynamic properties, pasting properties, solubility, swelling, as well as the structural characteristics of the starches extracted from the three varieties of kudzu roots. The results show that KS-6 has a higher content of functional ingredients thus can be used as an ideal functional starch. However, KS-6 has a higher amylopectin:amylose ratio of 4.65, resulting in a better solubility, higher transition temperature, and higher gelatinization enthalpy. KS-2 showed lower transition temperature and gelatinization enthalpy, as well as higher peak viscosity, through viscosity, and final viscosity. KS-1 could result in a soft texture after pasting. The appropriate variety of KS should be differentiated and selected according to application scenarios. This study provided valuable insights into the potential use of different KS in the food and nonfood industries. PRACTICAL APPLICATION: 1. KS-1 was found to be suitable for use as a food supplement. 2. KS-6 has the highest nutritional value. 3. They can be used as a substitute for other similar starches.
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Affiliation(s)
- Xuantong Duan
- College of Pharmacy, Jiangxi University of Chinese Medicine, Nanchang, China
| | - Yongmei Guan
- Key Laboratory of Modern Preparation of Traditional Chinese Medicines, Ministry of Education, Jiangxi University of Chinese Medicine, Nanchang, China
| | - Huanhuan Dong
- College of Pharmacy, Jiangxi University of Chinese Medicine, Nanchang, China.,Research and Development Center, Jiangxi Pharmaceutical Research Institute, Nanchang, China
| | - Mei Yang
- College of Pharmacy, Jiangxi University of Chinese Medicine, Nanchang, China
| | - Lihua Chen
- Key Laboratory of Modern Preparation of Traditional Chinese Medicines, Ministry of Education, Jiangxi University of Chinese Medicine, Nanchang, China
| | - Hua Zhang
- College of Pharmacy, Jiangxi University of Chinese Medicine, Nanchang, China
| | - Abid Naeem
- Key Laboratory of Modern Preparation of Traditional Chinese Medicines, Ministry of Education, Jiangxi University of Chinese Medicine, Nanchang, China
| | - Weifeng Zhu
- Key Laboratory of Modern Preparation of Traditional Chinese Medicines, Ministry of Education, Jiangxi University of Chinese Medicine, Nanchang, China
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15
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Wang Y, Guo J, Wang C, Li Y, Bai Z, Luo D, Hu Y, Chen S. Effects of konjac glucomannan and freezing on thermal properties, rheology, digestibility and microstructure of starch isolated from wheat dough. Lebensm Wiss Technol 2023. [DOI: 10.1016/j.lwt.2023.114588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
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16
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Tao H, Lu F, Zhu XF, Wang HL, Xu XM. Freezing-induced loss of wheat starch granule-associated proteins affected dough quality: From water distribution, rheological properties, microstructure, and gluten development. J Cereal Sci 2022. [DOI: 10.1016/j.jcs.2022.103606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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17
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Biglia A, Messina C, Comba L, Ricauda Aimonino D, Gay P, Brugiapaglia A. Quick-freezing based on a nitrogen reversed Brayton cryocooler prototype: Effects on the physicochemical characteristics of beef longissimus thoracis muscle. INNOV FOOD SCI EMERG 2022. [DOI: 10.1016/j.ifset.2022.103208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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18
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Tan YB, Wei JY, Tang YF, Ye YT, Wang L, Yang LJ, Chen ZX. Effect of Ionic and Non-Ionic Surfactants on the Pasting Characteristics and Digestive Properties of Regular and Frozen Starch for Oral Delivery. Foods 2022; 11:3395. [PMID: 36360008 PMCID: PMC9657325 DOI: 10.3390/foods11213395] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 10/23/2022] [Accepted: 10/24/2022] [Indexed: 10/21/2023] Open
Abstract
Starch is an ideal wall material for controlled release in oral delivery systems due to its non-allergic properties, availability, and cheap price. However, because of its poor mechanical behavior and high water permeability, it is necessary to modify the amphiphilic nature of starch. Surfactants are essential components to emulsify the lyophobic food ingredients. However, the interaction of starch with emulsifiers and how they affect the pasting behavior and digestion of starch are not well understood. In this paper, surfactants, such as non-ionic Tween (TW) and ionic sodium fatty acid (NaFA), with varying hydrophobic carbon chain lengths, were selected as model amphiphiles to investigate the structural, pasting, rheological properties and in vitro digestibility of regular and frozen starch samples. The results showed that, in most cases, the addition of TW reduced the viscosity of starch. However, saturated medium-chain NaFA increased the starch viscosity and rheological modulus greatly. Both surfactants inhibited starch digestion. This paper presents a comparative investigation on the effect of ionic and non-ionic surfactant on the structure and properties of corn starch, and therefore the information is useful for structural-based formulation with starch for developing colloidal delivery systems. It is also helpful for developing functional food with controllable digestion properties.
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Affiliation(s)
| | | | | | | | | | | | - Zhong-Xiu Chen
- Molecular Food Science Laboratory, College of Food and Biology Engineering, Zhejiang Gongshang University, Hangzhou 310018, China
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19
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Characteristics of wheat flour blends with water chestnut flour and effects of different temperature on frozen fermented dough. Cereal Chem 2022. [DOI: 10.1002/cche.10595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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20
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Fine structures of added maltodextrin impact stability of frozen bread dough system. Carbohydr Polym 2022; 298:120028. [DOI: 10.1016/j.carbpol.2022.120028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 08/03/2022] [Accepted: 08/22/2022] [Indexed: 11/22/2022]
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21
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Liu H, Liang Y, Guo S, Liu M, Chen Z, He B, Zhang X, Wang J. Understanding the strengthening effect of curdlan on the quality of frozen cooked noodles: studies on water characteristics and migration during cooking. Int J Food Sci Technol 2022. [DOI: 10.1111/ijfs.15910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hao Liu
- College of Biological Engineering Henan University of Technology Zhengzhou 450001 China
| | - Ying Liang
- College of Biological Engineering Henan University of Technology Zhengzhou 450001 China
| | - Shibo Guo
- College of Biological Engineering Henan University of Technology Zhengzhou 450001 China
| | - Mei Liu
- College of Food Science and Engineering Henan University of Technology Zhengzhou 450001 China
| | - Zilu Chen
- College of Biological Engineering Henan University of Technology Zhengzhou 450001 China
| | - Baoshan He
- College of Food Science and Engineering Henan University of Technology Zhengzhou 450001 China
| | - Xia Zhang
- College of Biological Engineering Henan University of Technology Zhengzhou 450001 China
| | - Jinshui Wang
- College of Biological Engineering Henan University of Technology Zhengzhou 450001 China
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22
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Fanari F, Iacob C, Carboni G, Desogus F, Grosso M, Wilhelm M. Broadband Dielectric Spectroscopy (BDS) investigation of molecular relaxations in durum wheat dough at low temperatures and their relationship with rheological properties. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2022.113345] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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23
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Zheng S, Yang Y, Li Z, Pan Z, Huang Z, Ai Z. A Comparative Study of Different Freezing Methods on Water Distribution, Retrogradation and Digestion Properties of Liangpi (Starch Gel Food). STARCH-STARKE 2022. [DOI: 10.1002/star.202100205] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Shuaishuai Zheng
- College of Food Science and Technology Henan Agricultural University Zhengzhou 450002 China
- National R&D Center For Frozen Rice&Wheat Products Processing Technology Zhengzhou 450002 China
| | - Yong Yang
- College of Food Science and Technology Henan Agricultural University Zhengzhou 450002 China
- Key Laboratory of Staple Grain Processing Ministry of Agriculture and Rural Affairs Zhengzhou 450002 China
| | - Zhen Li
- College of Food Science and Technology Henan Agricultural University Zhengzhou 450002 China
- Key Laboratory of Staple Grain Processing Ministry of Agriculture and Rural Affairs Zhengzhou 450002 China
- National R&D Center For Frozen Rice&Wheat Products Processing Technology Zhengzhou 450002 China
| | - Zhili Pan
- College of Food Science and Technology Henan Agricultural University Zhengzhou 450002 China
- Key Laboratory of Staple Grain Processing Ministry of Agriculture and Rural Affairs Zhengzhou 450002 China
- National R&D Center For Frozen Rice&Wheat Products Processing Technology Zhengzhou 450002 China
| | - Zhongmin Huang
- College of Food Science and Technology Henan Agricultural University Zhengzhou 450002 China
- Key Laboratory of Staple Grain Processing Ministry of Agriculture and Rural Affairs Zhengzhou 450002 China
- National R&D Center For Frozen Rice&Wheat Products Processing Technology Zhengzhou 450002 China
| | - Zhilu Ai
- College of Food Science and Technology Henan Agricultural University Zhengzhou 450002 China
- Key Laboratory of Staple Grain Processing Ministry of Agriculture and Rural Affairs Zhengzhou 450002 China
- National R&D Center For Frozen Rice&Wheat Products Processing Technology Zhengzhou 450002 China
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24
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Effect of multiple freezing/thawing cycles on the physicochemical properties and structural characteristics of starch from wheat flours with different gluten strength. Int J Biol Macromol 2022; 194:619-625. [PMID: 34822831 DOI: 10.1016/j.ijbiomac.2021.11.105] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2021] [Revised: 11/14/2021] [Accepted: 11/15/2021] [Indexed: 11/21/2022]
Abstract
The physicochemical properties and structural characteristics of starches from three wheat flours with different gluten strength (S-YM20, S-ZM27, and S-ZM366) during freezing/thawing (F/T) cycles were studied. After F/T treatment, the damaged starch content of these three starches all increased, and the lowest increment of damaged starch content after 8 F/T cycles was S-ZM366; the most serious distribution of particle surface concave hole and fracture was S-YM20, followed by S-ZM27 and S-ZM366; additionally, the results of solubility, swelling power, thermal stability and pasting properties indicated S-ZM366 exhibited the strongest resistance to F/T cycles. The differences of freezing resistance among the three starches were possibly ascribed to the differences in compositions, crystallinity and microstructure among these three starches. This study provides theoretical contribution to the development of frozen dough industry from the perspective of wheat variety.
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25
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ZHANG L, TIAN X, ZENG J, WANG H, GAO H, ZHANG K, WANG M. Changes of moisture distribution and starch properties in fermented dough under subfreezing temperature storage. FOOD SCIENCE AND TECHNOLOGY 2022. [DOI: 10.1590/fst.113821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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