Response surface optimization of the enzyme-based ultrasound-assisted extraction of acorn tannins and their corrosion inhibition properties

Luo, Xiaohu; Bai, Ru; Zhen, Deshuai; Zhou, Yang; Huang, Dena; Mao, Haili; Li, Xiaofeng; Zou, Hongtao; Xiang, Yang; Liu, Kanglian; Wen, Zhihui; Fu, Cheng

doi:10.1016/j.indcrop.2018.12.029

Cited by 58 publications

(27 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Treatment of WG showed the highest extraction yield on TTC due to the polarity of glycerol, which was consistent with a previous work [ 38 ]. Besides, TTC by UG extraction was much lower than WG due to the loss of ultrasonication post-processing [ 39 ].…”

Section: Resultsmentioning

confidence: 99%

Green Extraction of Phenolic Compounds from Lotus Seedpod (Receptaculum Nelumbinis) Assisted by Ultrasound Coupled with Glycerol

Bao

Gao

et al. 2021

Foods

View full text Add to dashboard Cite

Lotus Receptaculum Nelumbinis has been sparking wide research interests due to its rich phenolic compounds. In the present work, ultrasonic-assisted extraction coupled with glycerol was employed to extract phenolic compounds from Receptaculum Nelumbinis and the process was optimized using a response surface methodology with Box-Behnken design (BBD). The optimal conditions for the total phenolic content (TPC) extract were obtained: glycerol concentration of 40%, an extraction temperature of 66 °C, ultrasonic time of 44 min, and the solvent-to-solid ratio of 55 mL/g. Under these optimum extraction conditions, the extraction yield of TPC was 92.84 ± 2.13 mg gallic acid equivalents (GAE) /g. Besides, the antioxidant activities demonstrated the ability of free radical scavenging by four different methods that included 2,2-Diphenyl-1-picrylhydrazyl (DPPH), ferric reducing antioxidant power (FRAP), 2,2′-azinobis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS), and reducing activity (RA) were 459.73 ± 7.07, 529.97 ± 7.30, 907.61 ± 20.28, and 983.66 ± 11.80 μmol TE/g, respectively. Six phenolic compounds were identified by ultra-high pressure liquid chromatography combined with triple-time-of-flight mass spectrophotometry (UPLC-Triple-TOF/MS) from the extracts. Meanwhile, Fourier transform infrared (FTIR) was conducted to identify the characteristic functional groups of the extracts and thus reflected the presence of polyphenols and flavonoids. Scanning electron microscopy (SEM) illustrated the microstructure difference of four treatments, which might explain the relationships between antioxidant activities and the structures of phenolic compounds.

show abstract

Section: Resultsmentioning

confidence: 99%

Green Extraction of Phenolic Compounds from Lotus Seedpod (Receptaculum Nelumbinis) Assisted by Ultrasound Coupled with Glycerol

Bao

Gao

et al. 2021

Foods

View full text Add to dashboard Cite

show abstract

“…The continuing increase in ultrasonic power was mainly responsible for molecular degradation owing to the cavitation effect leading to low cordycepin content. As can be observed from Figure 10c, a circular shape suggests the low significant interaction between both independent factors [44] …”

Section: Resultsmentioning

confidence: 63%

“…The maximal cordycepin content was at 50 min for enzymolysis and 240 μL of alcalase. In addition, an elliptical shape contour plot as indicated in Figure 10a could help visualize information for the interaction between two independent variables [44] . This is used to validate the mutual significant interaction between incubation time and total enzyme volume in this study.…”

Section: Resultsmentioning

confidence: 99%

“…As can be observed from Figure 10c, a circular shape suggests the low significant interaction between both independent factors. [44] The interaction between incubation time and incubation temperature on the cordycepin content was illustrated in Figures 9d and 10d. It could be concluded that an elliptical contour observed showed a highly significant interaction between two variables.…”

Section: Simultaneous Effect Of Multi-factors On the Cordycepin Contentmentioning

confidence: 94%

See 1 more Smart Citation

Integrating of Aqueous Enzymolysis with Ethanolic Ultrasonication to Ameliorate Cordycepin Content from Vietnamese Cordyceps militaris and Biological Analysis of Extracts

Thanh

Dat

et al. 2021

ChemistrySelect

View full text Add to dashboard Cite

In this study, the employment of aqueous enzymolysis using alcalase with ethanolic ultrasonication extraction method was investigated. The cordycepin content was analyzed by using reversed‐phase high‐performance liquid chromatography with a diode array detector. The result showed that the highest cordycepin content of 0.4365±0.0309 mg/g could be obtained under extraction conditions including total enzyme volume of 240 μL, incubation time of 50 min, incubation temperature of 55 °C, and ultrasonic power of 840 W. The comparative studies of antioxidant activities of the extract were determined in terms of the DPPH free radical scavenging assay, ferric ion reducing power assay, and H2O2 scavenging assay. Additionally, the MTT assay was conducted to evaluate the anticancer activities of the extract, illustrating the cytotoxic property against Hep‐G2 cancer cells with the half‐maximal inhibitory concentration (IC50) value of 12.20±0.03 μg/mL compared to that of 0.36±0.03 μg/mL for ellipticine, MCF‐7 cancer cells with the IC50 value of 11.60±0.09 μg/mL compared to that of 0.51±0.04 μg/mL for ellipticine, and Lu cancer cells with the IC50 value of 34.50±0.25 μg/mL compared to that of 0.32±0.03 μg/mL for ellipticine.

show abstract

“…The extraction of shell pigment was conducted using an ultrasound-assisted enzymatic method, as described in a previous study [14] with modifications. In brief, 5 g of walnut shell powder was mixed with 0.012 g of cellulase in a 125 mL 50% ethanol solution.…”

Section: Preparation Of Solid Pigmentmentioning

confidence: 99%

Functional Components, Antioxidant Activity and Hypoglycemic Ability Following Simulated Gastro-Intestinal Digestion of Pigments from Walnut Brown Shell and Green Husk

Sun

Zeng

et al. 2019

Antioxidants

View full text Add to dashboard Cite

To assess the effects of digestion on the functional components of walnut pigment and their bioactivities, we developed an in vitro model simulating gastro-intestinal digestion. Results showed an increase in the contents of flavonoids and conjugated phenols (with retention rates higher than 100%) in husk pigment after digestion. The lowest of the 2,2 -azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) radical scavenging abilities was reached in the group with the minimum flavonoid content after digestion. Close correlation was observed between free phenol content and total reducing power, as the reducing power among different groups of husk pigment was in consistent with free phenols changes. The inhibitory effect of walnut pigment on α-amylase with/without digestion enzyme was similar. However, shell pigment showed improved inhibitory effect on α-glucosidase activity, with an increased inhibitory rate of 5.42%. In general, the antioxidant activity and hypoglycemic ability of walnut pigment were prone to chemical and enzymatic changes during simulated digestion, which were also related to the alteration of flavonoids and phenols.

show abstract

Response surface optimization of the enzyme-based ultrasound-assisted extraction of acorn tannins and their corrosion inhibition properties

Cited by 58 publications

References 24 publications

Green Extraction of Phenolic Compounds from Lotus Seedpod (Receptaculum Nelumbinis) Assisted by Ultrasound Coupled with Glycerol

Green Extraction of Phenolic Compounds from Lotus Seedpod (Receptaculum Nelumbinis) Assisted by Ultrasound Coupled with Glycerol

Integrating of Aqueous Enzymolysis with Ethanolic Ultrasonication to Ameliorate Cordycepin Content from Vietnamese Cordyceps militaris and Biological Analysis of Extracts

Functional Components, Antioxidant Activity and Hypoglycemic Ability Following Simulated Gastro-Intestinal Digestion of Pigments from Walnut Brown Shell and Green Husk

Contact Info

Product

Resources

About