Dual effects of slightly acidic electrolyzed water (SAEW) treatment on the accumulation of γ-aminobutyric acid (GABA) and rutin in germinated buckwheat

Hao, Jianxiong; Wu, Tongjiao; Li, Huiying; Wang, Wei; Liu, Haijie

doi:10.1016/j.foodchem.2016.01.037

Cited by 72 publications

(39 citation statements)

References 41 publications

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“…According to the acid growth theory, external acidification can cause cell wall loosening resulting in the release of cell wall-bound phenolic compounds during germination (Rayle & Cleland, 1992). Hao, Wu, Li, Wang, and Liu (2016) found that pretreatment of buckwheat with acidified water at pH 5.83 promoted the accumulation of rutin during 8 days of germination.…”

Section: Effect Of Pretreatment and The Germination Period On The Chementioning

confidence: 99%

Effect of acid pretreatment and the germination period on the composition and antioxidant activity of rice bean (Vigna umbellata)

et al. 2017

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Please cite this article as: Sritongtae, B., Sangsukiam, T., Morgan, M.R.A., Duangmal, K., Effect of acid pretreatment and the germination period on the composition and antioxidant activity of rice bean (Vigna umbellata), Food Chemistry (2017), doi: http://dx.doi.org/10.1016/j.foodchem. 2017.01.103 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. AbstractThis research evaluated effect of germination period and acid pretreatment on chemical composition and antioxidant activity of rice bean sprouts. Moisture, total phenolics, reducing sugar and B vitamins (thiamine, riboflavin, and niacin) content of steamed sprouts increased with increasing germination time (p≤0.05). Pretreatment with 1% (w/v) citric acid for 6 hours significantly increased the total phenolic content. The 18-hour-germinated rice beans showed the highest crude protein content, as determined using the Kjeldahl method. During germination, acid pretreatment led to a significant decrease in the intensity of the 76-kDa band. Germination caused a significant increase in radical scavenging activity and ferric reducing antioxidant power, especially in sprouts from citric acid-treated seeds. The antioxidant activities of the ethanolic extracts from both pretreated beans and the control were 1.3-1.6 times higher than those obtained from the water extracts. Major phenolics found in both 0-hour and 18-hour-germinated rice beans were catechin and rutin.

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Section: Effect Of Pretreatment and The Germination Period On The Chementioning

confidence: 99%

Effect of acid pretreatment and the germination period on the composition and antioxidant activity of rice bean (Vigna umbellata)

et al. 2017

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“…Positively charged ions, including hydrogen and sodium, move to the cathode to take up electrons and form hydrogen gas and sodium hydroxide, respectively [11,12]. SAEW application minimizes the effect on human health and safety issues from Cl 2 off-gassing, reduces corrosion of equipment, and limits phototoxic side effects while maximizing the application of hypochlorous acid species [13]. Despite great potential of electrolyzed saline solutions, there is no research on the use of hydrosols or hydrogels with antibacterial activity resulting from DC application with the exception of our studies [11,14,15].…”

Section: Introductionmentioning

confidence: 99%

Cytotoxicity, Bactericidal, and Antioxidant Activity of Sodium Alginate Hydrosols Treated with Direct Electric Current

Król

Marycz

Kulig

et al. 2017

IJMS

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The aim of the study was to investigate the effect of using direct electric current (DC) of 0, 200, and 400 mA for five minutes on the physiochemical properties, cytotoxicity, antibacterial, and antioxidant activity of sodium alginate hydrosols with different sodium chloride concentrations. The pH, oxidation-reduction potential (ORP), electrical conductivity (EC), and available chlorine concentration (ACC) were measured. The effect of sodium alginate hydrosols treated with DC on Staphylococcus aureus, Listeria monocytogenes, Bacillus cereus, Micrococcus luteus, Escherichia coli, Salmonella enteritidis, Yersinia enterocolitica, Pseudomonas fluorescence, and RAW 264.7 and L929 cells was investigated. Subsequently, the antioxidant properties of hydrosols were evaluated by determining the scavenging ability of 1,1-diphenyl-2-picrylhydrazyl free radical (DPPH) and ferric reducing antioxidant power (FRAP). The results have shown that after applying 400 mA in hydrosol samples with 0.1% and 0.2% NaCl all tested bacteria were inactivated. The ACC concentration of C400 samples with NaCl was equal to 13.95 and 19.71 mg/L, respectively. The cytotoxicity analysis revealed that optimized electric field conditions and the addition of sodium chloride allow for the avoidance of toxicity effects on normal cells without disturbing the antibacterial effects. Due to the presence of oxidizing substances, the DPPH of variants treated with DC was lower than the DPPH of control samples.

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“…Thus, water absorption is crucial during the process and changes of hundred‐grain weight can reflect it. Although our previous investigation concluded that SAEW (pH 5.83, ACC of 20.3 mg/L) could increase the hundred‐grain weight of buckwheat sprouts (Hao et al, ), the influence of pH and ACC of SAEW on it hadn't been reported. Therefore, hundred‐grain weight of samples was measured every day during germination and the results were shown in Figure .…”

Section: Resultsmentioning

confidence: 93%

“…Considered to be a potent bioactive compound, GABA has multiple physiological functions on health including lowering blood pressure (Diana, Quílez, & Rafecas, ; Kimura et al, ), improving immunity (Abdou et al, ), relieving oxidative stress (Xie, Xia, & Le, ), and mediating antiobesity effects (Imam et al, ), etc. Numerous reports had revealed that the content of GABA showed a rising tendency after germination in terms of several types of cereals like brown rice(Patil & Khan, ), soybean (Huang, Cai, & Xu, ), tartary buckwheat (Hao et al, ), etc. However, when it referred to buckwheat, the reason why GABA of it could accumulate during germinating period aroused our interest.…”

Section: Resultsmentioning

confidence: 99%

“…Another investigation demonstrated that the treatment with SAEW was an accessible channel to intensify the accumulation of GABA and antimicrobial capacity in the germinated brown millet (Li et al, ). Besides, it has been testified that SAEW could promote the dual accumulation of GABA and rutin in tartary buckwheat sprouts in our previous study (Hao, Wu, Li, Wang, & Liu, ). However, previous work only found that the promoting effect of SAEW on GABA accumulation was due to the activation of glutamic acid decarboxylase (GAD) during germination.…”

Section: Introductionmentioning

confidence: 93%

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Effect of pH and chlorine concentration of slightly acidic electrolyzed water on the buckwheat sprouts during germination

Qiao

Wang

Han

et al. 2019

J Food Process Preserv

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Previous research found that slightly acidic electrolyzed water (SAEW) promoted the growth of buckwheat sprouts and the accumulation of bioactive γ‐aminobutyric acid (GABA), but mechanisms had not been reported. At present study, the effects of pH and available chlorine concentration (ACC) of SAEW on buckwheat sprouts were investigated. It showed that SAEW1 with moderate pH (5.71 ± 0.03) resulted in the highest accumulation of GABA ((113.5 mg/100 g) in comparison with SAEW 2 (pH 5.01 ± 0.05) and SAEW 3 (pH 6.41 ± 0.04) treatments. Moreover, the higher ACC of SAEW was, the more content of GABA it accumulated, which suggested that ACC played an important role during germination of buckwheat. The above results were demonstrated by the investigation of glutamic acid decarboxylase activity during germination of buckwheat. However, it showed that higher ACC of SAEW had adverse impact on the growth of buckwheat sprouts while pH of SAEW had no adverse impact on the growth of buckwheat sprouts. Generally, appropriate pH and ACC of SAEW should be considered in the application of the production of buckwheat sprouts. Practical applications SAEW that had neutral pH (5.0–6.5) and lower ACC (10–30 mg/L) had been used in the production of sprouts. SAEW could promote the dual accumulation of GABA and rutin in tartary buckwheat sprouts. Obtaining the specific parameters of SAEW would beneficial for the most accumulation of these functional components when it is used for sprouts production.

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Dual effects of slightly acidic electrolyzed water (SAEW) treatment on the accumulation of γ-aminobutyric acid (GABA) and rutin in germinated buckwheat

Cited by 72 publications

References 41 publications

Effect of acid pretreatment and the germination period on the composition and antioxidant activity of rice bean (Vigna umbellata)

Effect of acid pretreatment and the germination period on the composition and antioxidant activity of rice bean (Vigna umbellata)

Cytotoxicity, Bactericidal, and Antioxidant Activity of Sodium Alginate Hydrosols Treated with Direct Electric Current

Effect of pH and chlorine concentration of slightly acidic electrolyzed water on the buckwheat sprouts during germination

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