|
1
|
Lu Y, Hao W, Zhang X, Zhao Y, Xu Y, Luo J, Liu Q, Liu Q, Wang L, Zhang C. Comparative Study of Physicochemical Properties and Starch Granule Structure in Seven Ginkgo Kernel Flours. Foods 2021; 10:1721. [PMID: 34441499 PMCID: PMC8392216 DOI: 10.3390/foods10081721] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 07/21/2021] [Accepted: 07/23/2021] [Indexed: 12/30/2022] Open
Abstract
Ginkgo biloba L. is an important economic tree species in China, and its kernels have been used as a popular food in Asian countries. Herein, the morphology, basic chemical components, starch granule structures, and physicochemical properties of kernel flours from seven ginkgo cultivars were investigated, and their relationships were analyzed. The kernels were oval or spherical in shape, with variable sizes. The starch granules exhibited both regular and irregular Maltese cross patterns. Amylose was mainly distributed in amorphous growth rings. A spatial variation in the 865/942 cm-1 ratio was observed within individual starch granules. Variations in total starch content, apparent amylose content (AAC), crude protein content (CPC), total amino acid content (TAAC), starch fine structure, and thermal and pasting properties were observed among the seven kernel flours. Pearson correlation coefficients and principle component analyses showed that the thermal properties were affected by kernel CPC, TAAC, AAC, and starch fine structure, while the pasting properties were affected by AAC and starch fine structure. Furthermore, experiments showed that the seed protein structure and α-amylase activity affected the pasting properties of ginkgo kernel flours.
Collapse
Affiliation(s)
- Yan Lu
- Key Laboratory of Plant Functional Genomics of the Ministry of Education, Co-Innovation Center for Modern Production Technology of Grain Crops, Agricultural College of Yangzhou University, Yangzhou 225009, China; (Y.L.); (W.H.); (Y.Z.); (Y.X.); (Q.L.)
| | - Weizhuo Hao
- Key Laboratory of Plant Functional Genomics of the Ministry of Education, Co-Innovation Center for Modern Production Technology of Grain Crops, Agricultural College of Yangzhou University, Yangzhou 225009, China; (Y.L.); (W.H.); (Y.Z.); (Y.X.); (Q.L.)
| | - Xiaomin Zhang
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China; (X.Z.); (L.W.)
| | - Yue Zhao
- Key Laboratory of Plant Functional Genomics of the Ministry of Education, Co-Innovation Center for Modern Production Technology of Grain Crops, Agricultural College of Yangzhou University, Yangzhou 225009, China; (Y.L.); (W.H.); (Y.Z.); (Y.X.); (Q.L.)
| | - Yang Xu
- Key Laboratory of Plant Functional Genomics of the Ministry of Education, Co-Innovation Center for Modern Production Technology of Grain Crops, Agricultural College of Yangzhou University, Yangzhou 225009, China; (Y.L.); (W.H.); (Y.Z.); (Y.X.); (Q.L.)
| | - Jixun Luo
- CSIRO Agriculture and Food, GPO Box 1600, Canberra, ACT 2601, Australia; (J.L.); (Q.L.)
| | - Qing Liu
- CSIRO Agriculture and Food, GPO Box 1600, Canberra, ACT 2601, Australia; (J.L.); (Q.L.)
| | - Qiaoquan Liu
- Key Laboratory of Plant Functional Genomics of the Ministry of Education, Co-Innovation Center for Modern Production Technology of Grain Crops, Agricultural College of Yangzhou University, Yangzhou 225009, China; (Y.L.); (W.H.); (Y.Z.); (Y.X.); (Q.L.)
| | - Li Wang
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China; (X.Z.); (L.W.)
| | - Changquan Zhang
- Key Laboratory of Plant Functional Genomics of the Ministry of Education, Co-Innovation Center for Modern Production Technology of Grain Crops, Agricultural College of Yangzhou University, Yangzhou 225009, China; (Y.L.); (W.H.); (Y.Z.); (Y.X.); (Q.L.)
| |
Collapse
|
|
2
|
Xiang Z, Ye F, Zhou Y, Wang L, Zhao G. Performance and mechanism of an innovative humidity-controlled hot-air drying method for concentrated starch gels: A case of sweet potato starch noodles. Food Chem 2018; 269:193-201. [PMID: 30100424 DOI: 10.1016/j.foodchem.2018.06.153] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Revised: 06/27/2018] [Accepted: 06/30/2018] [Indexed: 01/02/2023]
Abstract
The effects of humidity control on dried starch gels were investigated using starch noodles as a model. A two-stage innovative hot-air-drying regime was developed with the first stage humidity-controlled (70 °C, 60% RH) and the second at high temperature (100 °C). The proposed drying method is comparable to natural-air-drying in product quality and to conventional hot-air-drying (70 °C) in production efficiency. The operating humidity of the first stage predominated the swelling index and rehydration ratio of dry noodles as well as the hardness and chewiness of cooked noodles. The results from XRD, DSC, SEM, digital microscopy and low field TD 1H NMR evidenced that these outcomes were largely ascribed to the higher shrinkage, lower porosity, smoother surface, lesser shape deformation and higher starch retrogradation resulting from increased humidity. The results reported herein are valuable for regulating the physicochemical properties of dried starch gels and glimpsing the underlying mechanisms of related operations.
Collapse
Affiliation(s)
- Zhuoya Xiang
- College of Food Science, Southwest University, Chongqing 400715, People's Republic of China
| | - Fayin Ye
- College of Food Science, Southwest University, Chongqing 400715, People's Republic of China
| | - Yun Zhou
- College of Food Science, Southwest University, Chongqing 400715, People's Republic of China
| | - Lei Wang
- College of Food Science, Southwest University, Chongqing 400715, People's Republic of China
| | - Guohua Zhao
- College of Food Science, Southwest University, Chongqing 400715, People's Republic of China; Chongqing Sweet Potato Research Centre, Chongqing 400715, People's Republic of China.
| |
Collapse
|