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Liu J, Zhang R, Pi X, Zhang B. Structural features of rice starch-protein system: Influence of retrogradation time and quick-freezing temperature. Int J Biol Macromol 2024; 277:133981. [PMID: 39029826 DOI: 10.1016/j.ijbiomac.2024.133981] [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: 03/21/2024] [Revised: 07/15/2024] [Accepted: 07/16/2024] [Indexed: 07/21/2024]
Abstract
This work investigated the effect of retrogradation time (0 h, 2 h, 4 h, 6 h, 8 h) and freezing temperature (-20 °C, -32 °C, -80 °C) on the muti-scale structures of the rice starch-protein system of quick-frozen wet rice noodles. The Relative crystallinity and porosity of the rice starch-protein system increased with increasing retrogradation time. However, while longer retrogradation does lead to an improvement in relative crystallinity, it also results in significant damage to the microstructure. When the retrogradation time was 6 h, the microstructure of the rice starch-protein system was less damaged and the quality was better. The mass fractal dimension and relative crystallinity of the rice starch-protein system exhibited an increase as the freezing temperature was decreased from -20 to -80 °C. Additionally, the retrogradation degree of starch decreased, the size of ice crystals decreased, and the disruption of microforms was reduced. The muti-scale structures of the rice starch-protein systems were similar when quick-frozen at temperatures of -32 and -80 °C. Therefore, the optimal treatment method for practical production is to quick-freeze at -32 °C and age for 6 h to obtain high-quality quick-frozen wet rice noodles.
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Affiliation(s)
- Jiayuan Liu
- Chongqing Key Laboratory of Speciality Food Co-Built by Sichuan and Chongqing, College of Food Science, Southwest University, Chongqing 400715, China
| | - Rui Zhang
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Xiaowen Pi
- Chongqing Key Laboratory of Speciality Food Co-Built by Sichuan and Chongqing, College of Food Science, Southwest University, Chongqing 400715, China
| | - Binjia Zhang
- Chongqing Key Laboratory of Speciality Food Co-Built by Sichuan and Chongqing, College of Food Science, Southwest University, Chongqing 400715, China.
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2
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Liu C, Liu S, Li R, Zhang X, Chang X. A mechanistic study of chestnut starch retrogradation and its effects on in vitro starch digestion. Int J Biol Macromol 2024; 276:133803. [PMID: 38996890 DOI: 10.1016/j.ijbiomac.2024.133803] [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: 02/15/2024] [Revised: 05/16/2024] [Accepted: 07/09/2024] [Indexed: 07/14/2024]
Abstract
Starch retrogradation is a mechanism that is associated with the quality of starch-based food products. A thorough understanding of chestnut starch retrogradation behavior plays an important role in maintaining the quality of chestnut foods during processing and storage. In this study, we investigated the effects of storage time on the structural properties and in vitro digestibility of gelatinized chestnut starch by using X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, and solid-state 13C nuclear magnetic resonance (NMR). The results showed that the long-range crystallinity and short-range molecular order of retrograded chestnut starch first rapidly increased from 3 h to 3 d and then decreased from 3 d to 7 d, followed by a slight increase from 7 d to 14 d with retrogradation. With the extension of storage time at 4 °C, there were generally obvious increases in single and double helical structures, which were stacked into long-term ordered structure, resulting in increased enthalpy changes as detected by differential scanning calorimetry spectroscopy (DSC) and reduction of the digestion rate of retrograded chestnut starch. Overall, this study may provide important implications for manipulating and improving the quality of chestnut foods.
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Affiliation(s)
- Chang Liu
- College of Food Science & Technology, Hebei Normal University of Science and Technology, Qinhuangdao 066004, Hebei, China; Engineering Research Center of Chestnut Industry Technology of Ministry of Education, Hebei Key Laboratory of Active Components and Functions in Natural Products, Hebei Normal University of Science and Technology, Qinhuangdao 066004, Hebei, China.
| | - Suwen Liu
- College of Food Science & Technology, Hebei Normal University of Science and Technology, Qinhuangdao 066004, Hebei, China; Engineering Research Center of Chestnut Industry Technology of Ministry of Education, Hebei Key Laboratory of Active Components and Functions in Natural Products, Hebei Normal University of Science and Technology, Qinhuangdao 066004, Hebei, China
| | - Runfeng Li
- College of Food Science & Technology, Hebei Normal University of Science and Technology, Qinhuangdao 066004, Hebei, China; Engineering Research Center of Chestnut Industry Technology of Ministry of Education, Hebei Key Laboratory of Active Components and Functions in Natural Products, Hebei Normal University of Science and Technology, Qinhuangdao 066004, Hebei, China
| | - Xixun Zhang
- College of Food Science & Technology, Hebei Normal University of Science and Technology, Qinhuangdao 066004, Hebei, China; Engineering Research Center of Chestnut Industry Technology of Ministry of Education, Hebei Key Laboratory of Active Components and Functions in Natural Products, Hebei Normal University of Science and Technology, Qinhuangdao 066004, Hebei, China
| | - Xuedong Chang
- College of Food Science & Technology, Hebei Normal University of Science and Technology, Qinhuangdao 066004, Hebei, China
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He Z, Zeng J, Hu J, Chen J, Peng D, Du B, Li P. Effects of cooking methods on the physical properties and in vitro digestibility of starch isolated from Chinese yam. Int J Biol Macromol 2024; 267:131597. [PMID: 38621567 DOI: 10.1016/j.ijbiomac.2024.131597] [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: 12/09/2023] [Revised: 04/08/2024] [Accepted: 04/12/2024] [Indexed: 04/17/2024]
Abstract
The objective of this study was to compare the structural and functional attributes of Chinese yam starches obtained via different domestic cooking methods. Cooking changed the crystalline type from the C type to the CB type, and disrupted the short- and long-range molecular order of Chinese yam starch. The average chain length of amylopectin in BOS (boiling starch) was the smallest at 22.78, while RWS had the longest average chain length, reaching 24.24. These alterations in molecular structure resulted in variations in functional properties such as solubility, swelling power (SP), pasting characteristics, and rheological properties. Among these alterations, boiling was the most effective method for increasing the water-binding capacity and SP of starch. Specifically, its water holding capacity was 2.12 times that of RWS. In vitro digestion experiments indicated that BOS has a higher digestion rate (k = 0.0272 min-1) and lower RDS (rapidly digestible starch), which may be related to its amylopectin chain length distribution. This study can guide us to utilize yam starch through suitable cooking methods, which is relevant for the processing and application of Chinese yam starch.
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Affiliation(s)
- Zhilin He
- College of Food Science, South China Agricultural University, Guangzhou, Guangdong 510640, China
| | - Jieyu Zeng
- College of Food Science, South China Agricultural University, Guangzhou, Guangdong 510640, China
| | - Jianjun Hu
- College of Food Science, South China Agricultural University, Guangzhou, Guangdong 510640, China
| | - Jiahuan Chen
- College of Food Science, South China Agricultural University, Guangzhou, Guangdong 510640, China
| | - Dong Peng
- College of Food Science, South China Agricultural University, Guangzhou, Guangdong 510640, China
| | - Bing Du
- College of Food Science, South China Agricultural University, Guangzhou, Guangdong 510640, China
| | - Pan Li
- College of Food Science, South China Agricultural University, Guangzhou, Guangdong 510640, China.
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Chakraborty I, Govindaraju I, Kunnel S, Managuli V, Mazumder N. Effect of Storage Time and Temperature on Digestibility, Thermal, and Rheological Properties of Retrograded Rice. Gels 2023; 9:gels9020142. [PMID: 36826312 PMCID: PMC9957499 DOI: 10.3390/gels9020142] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 02/02/2023] [Accepted: 02/04/2023] [Indexed: 02/10/2023] Open
Abstract
Retrogradation is defined as the recrystallization or realignment of amylose and amylopectin chains upon cooling of gelatinization starch gels. The storage conditions such as the storage time and temperature are crucial factors that influence and govern the degree of retrogradation and in turn, affect the formation of resistant starch and alteration of thermal and rheological properties. This article investigates the effect of storage time and temperature on the properties of retrograded rice starch. Rice kernels of five different indigenous varieties, namely Diasang lahi, Khaju lahi, Dhusuri bao, Omkar, and Bili rajamudi were cooked by boiling in water and stored at 4 °C and -20 °C for 6 and 12 h, respectively. Differential scanning calorimetry (DSC) studies revealed in raw form that Bili rajamudi exhibited the highest peak gelatinization temperature (Tp, °C) at 79.05 °C whereas Diasang lahi showed the least Tp at 56.12 °C. Further, it was indicated that the Tp and degree of retrogradation (DR%) also increase with increasing time and decreasing temperature of storage. All samples stored at -20 °C for 12 h exhibited the highest degree of retrogradation DR%. Amongst all five varieties stored at -20 °C for 12 h, Omkar exhibited the highest %DR, followed by Bili rajamudi, Khaju lahi, Dhusuri bao, and Diasang lahi. A negative correlation was also established between Tp and resistant starch content (RS%). It was also observed that the resistant starch (RS%) content increased with the increasing time and decreasing temperature of storage. A strong negative correlation was observed between RS% and non-resistant starch (NRS%). Further, rheological studies indicated that retrogradation also affects the viscosity and dynamic rheological properties of starch. In this study, it was evident that extending storage duration from 6 to 12 h and lowering temperature from 4 to -20 °C impact retrogradation of rice starch, which in turn affects the starch's gelatinization, digestibility, and rheology. Rice starch retrograded at lower temperatures for a longer period could prove to be extremely beneficial for development of food products with better textural properties and high RS content or low glycemic index.
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Affiliation(s)
- Ishita Chakraborty
- Department of Biophysics, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India
| | - Indira Govindaraju
- Department of Biophysics, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India
| | - Steffi Kunnel
- Department of Biophysics, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India
| | - Vishwanath Managuli
- Department of Mechanical and Industrial Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India
| | - Nirmal Mazumder
- Department of Biophysics, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India
- Correspondence:
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Bangar SP, Ali NA, Olagunju AI, Pastor K, Ashogbon AO, Dash KK, Lorenzo JM, Ozogul F. Starch-based noodles: Current technologies, properties, and challenges. J Texture Stud 2023; 54:21-53. [PMID: 36268569 DOI: 10.1111/jtxs.12730] [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: 07/07/2022] [Revised: 10/02/2022] [Accepted: 10/11/2022] [Indexed: 11/29/2022]
Abstract
Starch noodles are gaining interest due to the massive popularity of gluten-free foods. Modified starch is generally used for noodle production due to the functional limitations of native starches. Raw materials, methods, key processing steps, additives, cooking, and textural properties determine the quality of starch noodles. The introduction of traditional, novel, and natural chemical additives used in starch noodles and their potential effects also impacts noodle quality. This review summarizes the current knowledge of the native and modified starch as raw materials and key processing steps for the production of starch noodles. Further, this article aimed to comprehensively collate some of the vital information published on the thermal, pasting, cooking, and textural properties of starch noodles. Technological, nutritional, and sensory challenges during the development of starch noodles are well discussed. Due to the increasing demands of consumers for safe food items with a long shelf life, the development of starch noodles and other convenience food products has increased. Also, the incorporation of modified starches overcomes the shortcomings of native starches, such as lack of viscosity and thickening power, retrogradation characteristics, or hydrophobicity. Starch can improve the stability of the dough structure but reduces the strength and resistance to deformation of the dough. Some technological, sensory, and nutritional challenges also impact the production process.
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Affiliation(s)
- Sneh Punia Bangar
- Department of Food, Nutrition, and Packaging Sciences, Clemson University, Clemenson, South Carolina, USA
| | - N Afzal Ali
- School of Agro and Rural Technology, Indian Institute of Technology Guwahati, Assam, India
| | | | - Kristian Pastor
- Faculty of Technology Novi Sad, University of Novi Sad, Novi Sad, Serbia
| | | | - Kshirod K Dash
- Department of Food Processing Technology, Ghani Khan Choudhury Institute of Engineering and Technology, Malda, West Bengal, India
| | - Jose M Lorenzo
- Centro Tecnológico de la Carne de Galicia, Ourense, Spain.,Área de Tecnología de los Alimentos, Facultad de Ciencias de Ourense, Universidad deVigo, Ourense, Spain
| | - Fatih Ozogul
- Department of Seafood Processing Technology, Faculty of Fisheries, University of Cukurova, Adana, Turkey
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Twin-Screw Extrusion of Oat: Evolutions of Rheological Behavior, Thermal Properties and Structures of Extruded Oat in Different Extrusion Zones. Foods 2022; 11:foods11152206. [PMID: 35892792 PMCID: PMC9329829 DOI: 10.3390/foods11152206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Revised: 07/18/2022] [Accepted: 07/22/2022] [Indexed: 12/10/2022] Open
Abstract
Further investigation of material properties during the extrusion process is essential to achieve precise control of the quality of the extrudate. Whole oat flour was used to produce low moisture puffed samples by a twin-screw extruder. X-ray diffraction (XRD), Scanning electron microscopy (SEM), infrared spectroscopy (FTIR), thermal analysis, and rheological experiments were used to deeply characterize changes in the structure and cross-linking of oats in different extrusion zones. Results indicated that the melting region was the main region that changed oat starch, including the major transformation of oat starch crystal morphology and the significant decrease of enthalpy representing the starch pasting peak in the differential scanning calorimeter (DSC) pattern (p < 0.05). Moreover, the unstable structure of the protein increased in the barrel and then decreased significantly (p < 0.05) after being extruded through the die head. The viscosity of oats increased in the cooking zone but decreased after the melting zone. A transformation occurred from elastic-dominant behavior to viscoelastic-dominant behavior for oats in the melting zone and after being extruded. This study provides further theoretical support for the research of the change of materials during extrusion and the development of oat-based food.
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Budiyanto F, Alhomaidi EA, Mohammed AE, Ghandourah MA, Alorfi HS, Bawakid NO, Alarif WM. Exploring the Mangrove Fruit: From the Phytochemicals to Functional Food Development and the Current Progress in the Middle East. Mar Drugs 2022; 20:303. [PMID: 35621954 PMCID: PMC9146169 DOI: 10.3390/md20050303] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 04/23/2022] [Accepted: 04/26/2022] [Indexed: 02/06/2023] Open
Abstract
Nowadays, the logarithmic production of existing well-known food materials is unable to keep up with the demand caused by the exponential growth of the human population in terms of the equality of access to food materials. Famous local food materials with treasury properties such as mangrove fruits are an excellent source to be listed as emerging food candidates with ethnomedicinal properties. Thus, this study reviews the nutrition content of several edible mangrove fruits and the innovation to improve the fruit into a highly economic food product. Within the mangrove fruit, the levels of primary metabolites such as carbohydrates, protein, and fat are acceptable for daily intake. The mangrove fruits, seeds, and endophytic fungi are rich in phenolic compounds, limonoids, and their derivatives as the compounds present a multitude of bioactivities such as antimicrobial, anticancer, and antioxidant. In the intermediary process, the flour of mangrove fruit stands as a supplementation for the existing flour with antidiabetic or antioxidant properties. The mangrove fruit is successfully transformed into many processed food products. However, limited fruits from species such as Bruguiera gymnorrhiza, Rhizophora mucronata, Sonneratia caseolaris, and Avicennia marina are commonly upgraded into traditional food, though many more species demonstrate ethnomedicinal properties. In the Middle East, A. marina is the dominant species, and the study of the phytochemicals and fruit development is limited. Therefore, studies on the development of mangrove fruits to functional for other mangrove species are demanding. The locally accepted mangrove fruit is coveted as an alternate food material to support the sustainable development goal of eliminating world hunger in sustainable ways.
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Affiliation(s)
- Fitri Budiyanto
- Department of Marine Chemistry, Faculty of Marine Sciences, King Abdulaziz University, P.O. Box 80207, Jeddah 21589, Saudi Arabia; (F.B.); (M.A.G.); (W.M.A.)
- National Research and Innovation Agency, Jl. M.H. Thamrin No. 8, Jakarta 10340, Indonesia
| | - Eman A. Alhomaidi
- Department of Biology, Faculty of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia;
| | - Afrah E. Mohammed
- Department of Biology, Faculty of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia;
| | - Mohamed A. Ghandourah
- Department of Marine Chemistry, Faculty of Marine Sciences, King Abdulaziz University, P.O. Box 80207, Jeddah 21589, Saudi Arabia; (F.B.); (M.A.G.); (W.M.A.)
| | - Hajer S. Alorfi
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia; (H.S.A.); (N.O.B.)
| | - Nahed O. Bawakid
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia; (H.S.A.); (N.O.B.)
| | - Wailed M. Alarif
- Department of Marine Chemistry, Faculty of Marine Sciences, King Abdulaziz University, P.O. Box 80207, Jeddah 21589, Saudi Arabia; (F.B.); (M.A.G.); (W.M.A.)
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Ge Z, Wang W, Gao S, Xu M, Liu M, Wang X, Zhang L, Zong W. Effects of konjac glucomannan on the long-term retrogradation and shelf life of boiled wheat noodles. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2022; 102:644-652. [PMID: 34151431 DOI: 10.1002/jsfa.11393] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 06/07/2021] [Accepted: 06/20/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND Starch retrogradation and moisture migration of boiled wheat noodles (BWNs) result in quality deterioration and short shelf life. The objective of this research was to investigate whether konjac glucomannan (KGM) could improve the quality of BWNs and further establish the shelf-life prediction model. RESULTS The moisture distribution, recrystallization, and thermal properties of BWNs during refrigerated or ambient temperature storage were determined. Low-field nuclear magnetic resonance data showed that KGM addition induced left-shifts of T21 and T22 values, indicating that KGM limited the mobility of bound and immobile water among noodle matrices. X-ray diffraction spectra revealed that KGM did not change the crystal patterns of BWNs but could inhibit the starch recrystallization after refrigerated storage. The Tp and ΔH values of retrograded samples notably (P < 0.05) decreased with the increase of KGM addition, suggesting the hinderance of starch retrogradation behavior by KGM. The shelf life of BWNs was predicted by accelerated storage test combined with the Arrhenius equation. The present data displayed that the predicted shelf life of vacuum-packed and sterilized BWNs with 10 g kg-1 KGM at 25 °C was 733 days, 2.4-fold that of the control group. CONCLUSION BWNs with KGM addition could inhibit starch retrogradation and improve the storage stability, consequently promoting noodle quality. © 2021 Society of Chemical Industry.
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Affiliation(s)
- Zhenzhen Ge
- College of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou, China
- Henan Key Laboratory of Cold Chain Food Quality and Safety Control, Zhengzhou University of Light Industry, Zhengzhou, China
| | - Weijing Wang
- College of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou, China
| | - Shanshan Gao
- College of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou, China
| | - Mingyue Xu
- College of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou, China
| | - Mengpei Liu
- College of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou, China
- Henan Key Laboratory of Cold Chain Food Quality and Safety Control, Zhengzhou University of Light Industry, Zhengzhou, China
| | - Xiaoyuan Wang
- College of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou, China
- Henan Key Laboratory of Cold Chain Food Quality and Safety Control, Zhengzhou University of Light Industry, Zhengzhou, China
| | - Lihua Zhang
- College of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou, China
- Henan Key Laboratory of Cold Chain Food Quality and Safety Control, Zhengzhou University of Light Industry, Zhengzhou, China
| | - Wei Zong
- College of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou, China
- Henan Key Laboratory of Cold Chain Food Quality and Safety Control, Zhengzhou University of Light Industry, Zhengzhou, China
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Nguyen SN, Drawbridge P, Beta T. Resistant Starch in Wheat‐, Barley‐, Rye‐, and Oat‐Based Foods: A Review. STARCH-STARKE 2022. [DOI: 10.1002/star.202100251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Si Nhat Nguyen
- Department of Food & Human Nutritional Sciences University of Manitoba Winnipeg MB R3T 2N2 Canada
| | - Pamela Drawbridge
- Department of Food & Human Nutritional Sciences University of Manitoba Winnipeg MB R3T 2N2 Canada
| | - Trust Beta
- Department of Food & Human Nutritional Sciences University of Manitoba Winnipeg MB R3T 2N2 Canada
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Wang T, Wang S, Zhai C, Wang L, Xie Y, Li Q, Zheng X. Study of starch aging characteristics based on Terahertz technology. Food Sci Nutr 2021; 9:4431-4439. [PMID: 34401091 PMCID: PMC8358343 DOI: 10.1002/fsn3.2417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 05/10/2021] [Accepted: 06/06/2021] [Indexed: 11/23/2022] Open
Abstract
Traditional methods for the determination of starch aging indicators often have a series of shortcomings such as time-consuming, high cost, large human error, damage to samples, environmental pollution, and high requirements for inspectors. Therefore, it is meaningful to find or establish a dynamic fingerprint identification pattern that can detect the aging degree of starch during the process of processing or storage quickly and accurately. It not only provides guidance for starch food processing but also saves a lot of human, material resources, and time. Terahertz technology is an emerging molecular spectroscopy technology in the 21st century. It is with low energy and basically harmless to the human body. It can also realize nondestructive testing of samples. In the experiment, the samples were prepared by the tableting method and the samples containing 20% of 50 mg samples were prepared with polyethylene as the diluent. The thickness of the samples was 1 mm and the diameter was 13 mm. The terahertz time-domain spectrometer was used to obtain the spectral information of aging starch at different aging times. After the pretreatment of the spectrum by vector normalization, first derivative, and multiple scattering correction, the prediction models of aging days, crystallinity, and resilience of aging starch were established, respectively. The determination coefficient (R 2) of the established models is all greater than 95%, indicating that the established models are highly reliable and can be used to predict the aging days, crystallinity, and retrogradation degree of starch. And the R 2 of the prediction model based on the refractive index spectrum is greater than that of the absorption coefficient spectrum. The experimental method obtains the dynamic fingerprint identification map of starch in the aging process, realizes the real-time monitoring and detection of the starch aging process, and provides an effective means for the production and processing of starch-related industries.
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Affiliation(s)
- Tao Wang
- College of Life Science and TechnologyXinjiang UniversityXinjiangChina
| | - Shuya Wang
- Nutrition and Health Research InstituteCOFCO CorporationBeijing Key Laboratory of Nutrition and Health and Food SafetyBeijingChina
| | - Chen Zhai
- Nutrition and Health Research InstituteCOFCO CorporationBeijing Key Laboratory of Nutrition and Health and Food SafetyBeijingChina
| | - Liang Wang
- College of Life Science and TechnologyXinjiang UniversityXinjiangChina
| | - Yunfeng Xie
- Nutrition and Health Research InstituteCOFCO CorporationBeijing Key Laboratory of Nutrition and Health and Food SafetyBeijingChina
| | - Qian Li
- China Communication Technology (Jiang Men) CorporationGuangdongChina
| | - Xu Zheng
- Shenzhen Institute of Terahertz Technology and InnovationGuangdongChina
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