Optimization of ultrasound-assisted extraction of okra (Abelmoschus esculentus (L.) Moench) polysaccharides based on response surface methodology and antioxidant activity

Wang, Kunli; Li, Mo; Wen, Xin; Chen, Xiaosong; He, Zhengyu; Ni, Yingdong

doi:10.1016/j.ijbiomac.2018.03.145

Cited by 92 publications

(45 citation statements)

References 49 publications

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“…Okra ( Abelmoschus esculentus (L.) Moench), also known as lady's fingers or ochro, is a flowering plant in the mallow family, which is distributed widely in tropical, subtropical, and warm temperate regions around the world including West Africa, South Asia, Southern Europe, and North America, with a total trade estimated to over $5 billion (Ghori, Alba, Smith, Conway, & Kontogiorgos, ; Wang et al, ). Okra is valued for its https://en.wikipedia.org/wiki/Pod_vegetable, which have long been used as a healthy vegetable and an important source of dietary medicines.…”

Section: Introductionmentioning

confidence: 99%

“…Okra is valued for its https://en.wikipedia.org/wiki/Pod_vegetable, which have long been used as a healthy vegetable and an important source of dietary medicines. The high values in antioxidant, hypoglycemic, antineoplastic, and hypolipidemic are ascribed to its contents of carbohydrates, fiber, minerals, flavonoids, and vitamin C (Messing et al, ; Santos et al, ; Wang et al, ). In recent years, it was widely cultivated in Hebei, Shandong, Zhejiang, Fujian, Guangdong, and Hainan of China (Shan, Zhou, & Zhang, ).…”

Section: Introductionmentioning

confidence: 99%

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Effect of drying methods on physicochemical properties and antioxidant activities of okra pods

Gong

Huang

Yang

et al. 2019

J Food Process Preserv

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The effects of hot air drying (HD), freeze‐drying (FD), microwave drying (MWD), natural convective drying (NCD), and vacuum drying (VD) on the physicochemical, nutritional, and https://www.sciencedirect.com/topics/food-science/antioxidant properties of okra pods were investigated. Changes in the surface morphology, color, rehydration ratio, protein, pectin, ascorbic acid, and phenolics, as well as antioxidant activities of okra pods measured by 2,2′‐azinobis (3‐ethylbenzo thiazoline‐6‐sulphonic acid) diammonium salt (ABTS), 1,1‐diphenyl‐2‐picrylhydrazyl (DPPH), and Ferric Ion Reducing Antioxidant Power (FRAP) assays were evaluated. In general, FD products exhibited a better retention of the texture characteristics, nutritional, and antioxidant activities, and was suitable for okra pods drying, although FD was the longer time‐consuming method among the five drying methods. Furthermore, NCD products were poorer in color, texture, and nutrition. Future studies should continuously focus on various combinations of different types of drying methods to supply okra pods products with the most affordable cost and the highest quality. Practical applications Physicochemical properties and antioxidant capacities of okra pods are affected by the drying process. The drying process with nonthermal, low temperature, and low content of oxygen is beneficial to the retention of nutrients and functional components. In general, freeze‐drying exhibited a better texture characteristics and good antioxidant activities, although higher energy and longer time consumption was the current challenge. How to combine the different types of drying methods has become an inevitable trend and research focus.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of drying methods on physicochemical properties and antioxidant activities of okra pods

Gong

Huang

Yang

et al. 2019

J Food Process Preserv

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“…Wang et al. (2018) observed that the optimal temperature range for carbohydrates extraction by UAE was between 55 and 65°C, and higher temperatures caused a decrease in its content, probably due to degradation reactions. In addition, You, Bin, Yan, Yanan, and Zhenqiang (2018) and Rayo‐Mendez et al.…”

Section: Resultsmentioning

confidence: 99%

Ultrasound‐assisted extraction of phenolic compounds and soluble sugars from the stem portion of peach palm

Donadone

Giombelli²,

Silva³

et al. 2020

J Food Process Preserv

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The aim of this work was to investigate the ultrasound‐assisted extraction (UAE) of total phenolic compounds (TPC) and soluble sugars (SS) from the by‐product of peach palm (stem portion). The effect of the processing variables temperature (30–60°C), time (15–45 min), and power density (8.47–25.42 mW cm−3) were evaluated. The maximum contents (dry basis) of TPC (345.81 ± 2.82 mg gallic acid equivalent 100 g−1) and SS (16.68 ± 0.24 g 100 g−1) were obtained, respectively, at 60°C, 30 min and 8.47 mW cm−3 (condition 1) and 60°C, 45 min and 25.42 mW cm−3; in these conditions, the extracts had higher sucrose content than glucose and fructose. The highest content of phenolic acids (gallic, coumaric, vanillic, ferulic, trans‐cinnamic) and highest antioxidant activity were obtained in the condition 1. UAE can be considered an effective method for the extraction of TPC and SS from peach palm stem. Practical applications The ultrasound‐assisted extraction (UAE) was applied in the by‐product of heart‐of‐palm (stem portion) to the removal of phenolic compounds and soluble sugars. To realize this process with time and energy economy, the maximized condition of extraction observed at 60°C, 30 min, and 8.47 mW cm−3 was the most interesting. This extract showed the highest content of phenolic compounds and highest antioxidant potential, which can allow its application to preserve the shelf life of food products or to produce food supplements. The soluble sugars extracted can also be used, as example, in fermentative process. Therefore, the results indicate the viability of UAE to offer alternatives to utilization of stem portion of peach palm.

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“…Additionally, it is more than expected that fructose plays a key role in Group 3 (red dots), which mainly contains MAE extracts, since the more polar solvents (ethanol), higher temperatures, and higher solvent/material ratios applied upheld sugar extraction [41][42][43]. However, due to the different extraction conditions for each run (Tables S2b and S5), a higher distribution of group samples was observed (Figure 10c, green bar).…”

Section: Nmr-based Metabolic Profiling For Doe Apricot Extracts To Elmentioning

confidence: 92%

Expanding the Role of Sub-Exploited DOE-High Energy Extraction and Metabolomic Profiling towards Agro-Byproduct Valorization: The Case of Carotenoid-Rich Apricot Pulp

et al. 2020

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Traditional extraction remains the method-of-choice for phytochemical analyses. However, the absence of an integrated analytical platform, focusing on customized, validated extraction steps, generates tendentious and non-reproducible data regarding the phytochemical profile. Such a platform would also support the exploration and exploitation of plant byproducts, which are a valuable source of bioactive metabolites. This study deals with the incorporation of (a) the currently sub-exploited high energy extraction methods (ultrasound (UAE)- and microwave-assisted extraction (MAE)), (b) experimental design (DOE), and (c) metabolomics, in an integrated analytical platform for the extensive study of plant metabolomics and phytochemical profiling. The recovery of carotenoids from apricot by-products (pulp) is examined as a case study. MAE, using ethanol as solvent, achieved higher carotenoid yields compared to UAE, where 1:1 chloroform-methanol was employed, and classic extraction. Nuclear magnetic resonance (NMR)-based metabolomic profiling classified extracts according to the variations in co-extractives in relation to the extraction conditions. Extracts with a lower carotenoid content contained branched-chain amino acids as co-extractives. Medium carotenoid content extracts contained choline, unsaturated fatty acids, and sugar alcohols, while the highest carotenoid extracts were also rich in sugars. Overall, the proposed pipeline can provide different the phytochemical fractions of bioactive compounds according to the needs of different industrial sectors (cosmetics, nutraceuticals, etc.).

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Optimization of ultrasound-assisted extraction of okra (Abelmoschus esculentus (L.) Moench) polysaccharides based on response surface methodology and antioxidant activity

Cited by 92 publications

References 49 publications

Effect of drying methods on physicochemical properties and antioxidant activities of okra pods

Effect of drying methods on physicochemical properties and antioxidant activities of okra pods

Ultrasound‐assisted extraction of phenolic compounds and soluble sugars from the stem portion of peach palm

Expanding the Role of Sub-Exploited DOE-High Energy Extraction and Metabolomic Profiling towards Agro-Byproduct Valorization: The Case of Carotenoid-Rich Apricot Pulp

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