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Feng Y, Xie Z, Huang M, Tong X, Hou S, Tin H, Zhao M. Decoding temperature-driven microbial community changes and flavor regulation mechanism during winter fermentation of soy sauce. Food Res Int 2024; 177:113756. [PMID: 38225154 DOI: 10.1016/j.foodres.2023.113756] [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: 08/10/2023] [Revised: 11/17/2023] [Accepted: 11/22/2023] [Indexed: 01/17/2024]
Abstract
The flavor regulation of soy sauce fermented in winter is imminent challenge for the industry, while fermentation temperature is considered as an effective method to fortify soy sauce flavor. Thus, industrial-level fermentation systems with controlled temperature at 30°C (SSCT) and regular temperature (SSRT) in winter were designed to elucidate molecular basis and microbial regulatory mechanism of temperature-controlled flavor enhancement of soy sauce. Sensory evaluation suggested 30°C fermentation enhanced caramel-like, floral, fruity, roasted nut and smoky aroma. A total of 160 volatiles were identified, of which 39 components were evaluated for odor activity value (OAV). Eleven volatiles were determined as the odor markers distinguishing the aroma profiles of SSRT and SSCT, among which 2,5-dimethyl-4-hydroxy-3(2H)-furanone (HDMF, caramel-like), β-damascenone (floral), ethyl 2-methylpropanoate (fruity), ethyl acetate (fruity) and 2/3-methyl-1-butanol (malty, alcoholic) were largely responsible for the flavor enhancement. Moreover, high-throughput sequencing results demonstrated the temperature intervention induced more differential bacterial structure (R = 0.324, P = 0.001) than fungal structure (R = 0.069, P = 0.058). Correlation analysis revealed dominant and low-abundance genus together drove the formation and variation of volatile profile, particularly Weissella, Tetragenococcus, Starmerella and Pediococcus. Representatively, the formation pathways of key aroma substances HDMF and 5-ethyl-4-hydroxy-2-methyl-3(2H)-furanone (HEMF) were elaborated. Both temperature-mediated abiotic reactions and gene functions of microbiota were proposed to favor the yields of HDMF and C5 precursor of HEMF, whereas the small populations of Zygosaccharomyces and insufficient acetaldehyde limited the elevation of the HEMF level through the biosynthesis pathway. This study provided the practical and theoretical basis for the industrial applications of temperature control in soy sauce fermentation.
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Affiliation(s)
- Yunzi Feng
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China; Guangdong Food Green Processing and Nutrition Regulation Technologies Research Center, Guangzhou 510650, China
| | - Ziming Xie
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China; Guangdong Food Green Processing and Nutrition Regulation Technologies Research Center, Guangzhou 510650, China
| | - Mingtao Huang
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
| | - Xing Tong
- Guangdong Haitian Innovation Tech Co., Ltd., Foshan, Guangdong 528000, China
| | - Sha Hou
- Foshan Haitian (Gaoming) Flavoring & Food Co., Ltd., Foshan, Guangdong 528511, China
| | - Hoeseng Tin
- Foshan Haitian (Gaoming) Flavoring & Food Co., Ltd., Foshan, Guangdong 528511, China.
| | - Mouming Zhao
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China; Guangdong Food Green Processing and Nutrition Regulation Technologies Research Center, Guangzhou 510650, China.
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Yang Y, Xie J, Wang Q, Deng Y, Zhu L, Zhu J, Yuan H, Jiang Y. Understanding the dynamic changes of volatile and non-volatile metabolites in black tea during processing by integrated volatolomics and UHPLC-HRMS analysis. Food Chem 2024; 432:137124. [PMID: 37633132 DOI: 10.1016/j.foodchem.2023.137124] [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: 04/19/2023] [Revised: 08/03/2023] [Accepted: 08/07/2023] [Indexed: 08/28/2023]
Abstract
Processing technology has an important effect on the flavor quality of black tea. However, the dynamic changes of volatile and non-volatile metabolites in black tea during processing are poorly understood. In this study, the volatile and non-volatile compounds during black tea processing were comprehensively characterized by integrated volatolomics and UHPLC-Q-Exactive/MS analysis. Volatile and non-volatile metabolites changed continuously throughout the processing process, especially during the withering stage. A total of 178 volatile metabolites and 103 non-volatile metabolites were identified. Among them, 11 volatile components with relative odor activity value greater than 1 (including dimethyl sulfide, 3-methylbutanal, 2-methylbutanal, β-myrcene, β-ocimene, linalool, methyl salicylate, β-cyclocitral, β-citral, citral, and β-ionone) were regarded as key aroma-active components responsible for finished black tea with sweet aroma. This study provides a comprehensive understanding of dynamic evolution trajectory of volatile and non-volatile metabolites during processing, which lays a theoretical foundation for the targeted processing of high-quality black tea.
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Affiliation(s)
- Yanqin Yang
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, China
| | - Jialing Xie
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, China
| | - Qiwei Wang
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, China
| | - Yuliang Deng
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, China
| | - Li Zhu
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, China.
| | - Jiayi Zhu
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, China
| | - Haibo Yuan
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, China.
| | - Yongwen Jiang
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, China.
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Zhang X, Long J, Liu J, Hua Y, Zhang C, Li X. Fermentation Characteristics, Antinutritional Factor Level and Flavor Compounds of Soybean Whey Yogurt. Foods 2024; 13:330. [PMID: 38275697 PMCID: PMC10814812 DOI: 10.3390/foods13020330] [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: 11/21/2023] [Revised: 12/19/2023] [Accepted: 01/16/2024] [Indexed: 01/27/2024] Open
Abstract
Soybean whey contains high levels of off-flavors and anti-nutritional factors and is generally considered unsuitable for direct application in the food industry. In this work, to reduce beany off-flavors and anti-nutritional factors, and to improve its fermentation characteristics, soybean whey was treated with electrodialysis desalination, vacuum concentration and lactic acid bacteria (LAB) fermentation. The results showed that electrodialysis desalination increased the fermentation rate and the number of viable lactic acid bacteria of soybean whey yogurt. More than 90% of the antinutritional factor level (urease and trypsin inhibitory activity) was removed due to high-temperature denaturation inactivation and LAB degradation. Concentrated desalted soybean whey yogurt (CDSWY) possessed larger values for firmness and consistency, and a denser network microstructure compared with undesalted yogurt. Over 90% of off-flavors including hexanal, 1-octen-3-ol and 1-octen-3-one were removed after electrodialysis desalination and concentration treatment. Meanwhile, the newly generated β-damascenone through carotenoid degradation and 2,3-butanedione improved the pleasant flavor and sensory quality of CDSWY, while the salty taste of CSWY lowered its sensory quality. This study provided a theoretical basis for better utilization of soybean whey to develop a plant-based yogurt like dairy yogurt.
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Affiliation(s)
- Xinyu Zhang
- School of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China; (X.Z.); (J.L.); (J.L.); (Y.H.)
- State Key Laboratory of Food Science and Resources, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China
- Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China
| | - Jie Long
- School of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China; (X.Z.); (J.L.); (J.L.); (Y.H.)
- State Key Laboratory of Food Science and Resources, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China
- Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China
| | - Jun Liu
- School of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China; (X.Z.); (J.L.); (J.L.); (Y.H.)
- State Key Laboratory of Food Science and Resources, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China
- Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China
| | - Yufei Hua
- School of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China; (X.Z.); (J.L.); (J.L.); (Y.H.)
- State Key Laboratory of Food Science and Resources, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China
- Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China
| | - Caimeng Zhang
- School of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China; (X.Z.); (J.L.); (J.L.); (Y.H.)
- State Key Laboratory of Food Science and Resources, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China
- Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China
| | - Xingfei Li
- School of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China; (X.Z.); (J.L.); (J.L.); (Y.H.)
- State Key Laboratory of Food Science and Resources, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China
- Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China
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Zhang M, Zhou C, Zhang C, Xu K, Lu L, Huang L, Zhang L, Li H, Zhu X, Lai Z, Guo Y. Analysis of Characteristics in the Macro-Composition and Volatile Compounds of Understory Xiaobai White Tea. PLANTS (BASEL, SWITZERLAND) 2023; 12:4102. [PMID: 38140429 PMCID: PMC10747399 DOI: 10.3390/plants12244102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2023] [Revised: 12/04/2023] [Accepted: 12/05/2023] [Indexed: 12/24/2023]
Abstract
Understory planting affects the growth environment of tea plants, regulating the tea plant growth and the formation of secondary metabolites, which in turn affects the flavor of Xiaobai white tea. The present research adopted biochemical composition determination, widely targeted volatilities (WTV) analysis, multivariate statistical analysis, and odor activity value (OAV) analysis to analyze the characteristics in the macro-composition and volatile compounds of understory white tea. The sensory evaluation results indicated that understory Xiaobai white tea (LWTs) was stronger than ordinary Xiaobai white tea (PWTs) in terms of the taste of smoothness, sweetness, and thickness as well as the aromas of the flower and sweet. Understory planting reduced light intensity and air temperature, increased air humidity, organic matter, total nitrogen, and available nitrogen contents, which improved the growth environment of tea plants. The phytochemical analysis showed that the water-extractable substances, caffeine, flavonoids, and soluble sugar contents of understory tea fresh-leaf (LF) were higher than those of ordinary fresh-leaf (PF). The phytochemical analysis showed that the free amino acids, theaflavins, thearubigins, water-extractable substances, and tea polyphenols contents of LWTs were significantly higher than those of PWTs, which may explain the higher smoothness, sweetness, and thickness scores of LWTs than those of PWTs. The 2-heptanol, 2-decane, damasone, and cedar alcohol contents were significantly higher in LWTs than in PWTs, which may result in stronger flowery and sweet aromas in LWTs than in PWTs. These results provide a firm experimental basis for the observed differences in the flavor of LWTs and PWTs.
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Affiliation(s)
- Mengcong Zhang
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (M.Z.); (C.Z.); (C.Z.); (K.X.); (L.L.); (L.H.); (L.Z.); (H.L.); (Z.L.)
| | - Chengzhe Zhou
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (M.Z.); (C.Z.); (C.Z.); (K.X.); (L.L.); (L.H.); (L.Z.); (H.L.); (Z.L.)
- Institute of Horticultural Biotechnology, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Cheng Zhang
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (M.Z.); (C.Z.); (C.Z.); (K.X.); (L.L.); (L.H.); (L.Z.); (H.L.); (Z.L.)
| | - Kai Xu
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (M.Z.); (C.Z.); (C.Z.); (K.X.); (L.L.); (L.H.); (L.Z.); (H.L.); (Z.L.)
| | - Li Lu
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (M.Z.); (C.Z.); (C.Z.); (K.X.); (L.L.); (L.H.); (L.Z.); (H.L.); (Z.L.)
| | - Linjie Huang
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (M.Z.); (C.Z.); (C.Z.); (K.X.); (L.L.); (L.H.); (L.Z.); (H.L.); (Z.L.)
| | - Lixuan Zhang
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (M.Z.); (C.Z.); (C.Z.); (K.X.); (L.L.); (L.H.); (L.Z.); (H.L.); (Z.L.)
| | - Huang Li
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (M.Z.); (C.Z.); (C.Z.); (K.X.); (L.L.); (L.H.); (L.Z.); (H.L.); (Z.L.)
| | - Xuefang Zhu
- Nanping Jianyang District Tea Development Center, Nanping 353000, China;
| | - Zhongxiong Lai
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (M.Z.); (C.Z.); (C.Z.); (K.X.); (L.L.); (L.H.); (L.Z.); (H.L.); (Z.L.)
- Institute of Horticultural Biotechnology, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Yuqiong Guo
- Anxi College of Tea Science (College of Digital Economy), Fujian Agriculture and Forestry University, Quanzhou 362400, China
- Tea Industry Research Institute, Fujian Agriculture and Forestry University, Fuzhou 350002, China
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Tang P, Wang JQ, Wang YF, Jin JC, Meng X, Zhu Y, Gao Y, Xu YQ. Comparison analysis of full-spectrum metabolomics revealed on the variation of potential metabolites of unscented, Chloranthus spicatus scented, and Osmanthus fragrans (Thunb.) Lour. scented Congou black teas. Front Nutr 2023; 10:1234807. [PMID: 37645629 PMCID: PMC10461629 DOI: 10.3389/fnut.2023.1234807] [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: 06/05/2023] [Accepted: 07/18/2023] [Indexed: 08/31/2023] Open
Abstract
Introduction In recent years, scented black tea has attracted much attention due to its pleasant floral aroma and mellow flavor, but little research has been carried out on its flavor metabolic profile. Methods In this study, the flavor metabolic profiles of unscented, Chloranthus spicatus scented, and Osmanthus fragrans (Thunb.) Lour. scented Congou black teas were investigated using full-spectrum metabolomics analysis method, the first time that the flavor profiles of scented black tea were characterized in detail. Results and Discussion The results revealed that a total of 3,128 metabolites were detected in the three teas. Based on the criteria of variable importance in the project >1 and fold change ≥2 or ≤ 0.5, 761 non-volatile metabolites and 509 volatile metabolites were filtered as differential metabolites. Many differential non-volatile metabolites belonged to flavonoids, phenolic acids, and terpenoids. Floral, fruity and herbaceous volatile metabolites were significantly up-regulated in Chloranthus spicatus scented Congou black tea while sweet and fruity volatile metabolites were significantly down-regulated in Osmanthus fragrans (Thunb.) Lour. scented Congou black tea. The results contribute to a better understanding of the scenting techniques on the flavor quality of scented black teas and provide some information on the flavor chemistry theory of scented black teas.
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Affiliation(s)
- Ping Tang
- Hangzhou Vocational & Technical College, Hangzhou, China
| | - Jie-Qiong Wang
- Key Laboratory of Biology, Genetics and Breeding of Special Economic Animals and Plants, Ministry of Agriculture and Rural Affairs, Tea Research Institute Chinese Academy of Agricultural Sciences, Hangzhou, China
- College of Food Science, Southwest University, Chongqing, China
| | - Yong-Feng Wang
- Jingdezhen Jin Gui Yuan Agricultural Development Co Ltd, Jingdezhen, China
| | - Jian-Chang Jin
- College of Biological and Environmental Engneering, Zhejiang Shuren University, Hangzhou, China
| | - Xin Meng
- College of Food and Health, Zhejiang A&F University, Hangzhou, China
| | - Yan Zhu
- College of Food and Health, Zhejiang A&F University, Hangzhou, China
| | - Ying Gao
- Key Laboratory of Biology, Genetics and Breeding of Special Economic Animals and Plants, Ministry of Agriculture and Rural Affairs, Tea Research Institute Chinese Academy of Agricultural Sciences, Hangzhou, China
| | - Yong-Quan Xu
- Key Laboratory of Biology, Genetics and Breeding of Special Economic Animals and Plants, Ministry of Agriculture and Rural Affairs, Tea Research Institute Chinese Academy of Agricultural Sciences, Hangzhou, China
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Zhang S, Jiang X, Li C, Qiu L, Chen Y, Yu Z, Ni D. Effect of Fermentation Humidity on Quality of Congou Black Tea. Foods 2023; 12:foods12081726. [PMID: 37107521 PMCID: PMC10138149 DOI: 10.3390/foods12081726] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 04/14/2023] [Accepted: 04/18/2023] [Indexed: 04/29/2023] Open
Abstract
This study investigated the effect of different fermentation humidities (55%, 65%, 75%, 85% and 95%) on congou black tea quality and bioactivity. Fermentation humidity mainly affected the tea's appearance, aroma and taste quality. The tea fermented at low humidity (75% or below) showed a decrease in tightness, evenness and moistening degree, as well as a heavy grassy and greenish scent, plus a green, astringent and bitter taste. The tea fermented at a high humidity (85% or above) presented a sweet and pure aroma, as well as a mellow taste, plus an increase of sweetness and umami. With increasing fermentation humidity, the tea exhibited a drop in the content of flavones, tea polyphenols, catechins (EGCG, ECG) and theaflavins (TF, TF-3-G), contrasted by a rise in the content of soluble sugars, thearubigins and theabrownins, contributing to the development of a sweet and mellow taste. Additionally, the tea showed a gradual increase in the total amount of volatile compounds and in the content of alcohols, alkanes, alkenes, aldehydes, ketones and acids. Moreover, the tea fermented at a low humidity had stronger antioxidant activity against 2, 2-Diphenyl-1-picrylhydrazyl (DPPH) and a higher inhibiting capability on the activities of α-amylase and α-glucosidase. Overall results indicated the desirable fermentation humidity of congou black tea should be 85% or above.
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Affiliation(s)
- Sirui Zhang
- National Key Laboratory for Germplasm Innovation and Utilization of Horticultural Crops, Wuhan 430070, China
- College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, China
| | - Xinfeng Jiang
- Jiangxi Sericulture and Tea Research Institute, Nanchang 330202, China
| | - Chen Li
- Jiangxi Sericulture and Tea Research Institute, Nanchang 330202, China
| | - Li Qiu
- National Key Laboratory for Germplasm Innovation and Utilization of Horticultural Crops, Wuhan 430070, China
| | - Yuqiong Chen
- National Key Laboratory for Germplasm Innovation and Utilization of Horticultural Crops, Wuhan 430070, China
| | - Zhi Yu
- College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan 430070, China
| | - Dejiang Ni
- National Key Laboratory for Germplasm Innovation and Utilization of Horticultural Crops, Wuhan 430070, China
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Li Y, Wu T, Deng X, Tian D, Ma C, Wang X, Li Y, Zhou H. Characteristic aroma compounds in naturally withered and combined withered γ-aminobutyric acid white tea revealed by HS-SPME-GC-MS and relative odor activity value. Lebensm Wiss Technol 2023. [DOI: 10.1016/j.lwt.2023.114467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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