Clarification of red beet stalks extract by microfiltration combined with ultrafiltration

Santos, Cláudia Destro dos; Scherer, Roberta Külzer; Cassini, Aline Schilling; Marczak, Lígia Damasceno Ferreira; Tessaro, Isabel Cristina

doi:10.1016/j.jfoodeng.2016.03.031

Cited by 22 publications

(8 citation statements)

References 21 publications

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“…colorants, emulsifiers, thickeners, antioxidants, among others) (Azeredo, 2009;Dias et al, 2016;Gong and Bassi, 2016). Although numerous methodologies can be found in literature for bioactive compounds recovery like ultrafiltration, supercritical fluid extraction, ultrasound extraction, resin adsorption, encapsulation and spray drying among others (da Silva et al, 2016;Destro dos Santos et al, 2016;Kaderides and Goula, 2017;Li et al, 2012;Medina-Meza and Barbosa-Cánovas, 2015;Yamashita et al, 2017), five distinct recovery stages can principally be observed: macroscopic pre-treatment, macro and micromolecules separation, extraction, purification and nutraceuticals formation (Galanakis, 2012).…”

Section: Peak Tentative Identificationmentioning

confidence: 99%

Bioactive characterization of Persea americana Mill. by-products: A rich source of inherent antioxidants

Melgar

Días

Ćirić

et al. 2018

Industrial Crops and Products

123

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A B S T R A C TAvocado (Persea americana Mill.) is a worldwide consumed fruit, with great interest for cosmetic and pharmaceutical industries; however, 30% of avocado fruits are bio-wastes (peels and kernels), converting them into a potential source of bioactive compounds, such as phenolic compounds. Therefore, the hydroethanolic extracts of peels and kernels of Persea america Mill. var. Hass were analysed regarding their individual phenolic profile by HPLC-DAD/ESI-MS and correlated with their antioxidant, antimicrobial and cytotoxic activities. Avocado byproducts presented a very distinct phenolic profile, presenting higher concentration in peels (227.9 mg/g of extract for total phenolic content), mainly in (epi)catechin derivatives (175 mg/g of extract), followed by chlorogenic derivatives (42.9 mg/g of extract). In this study hydrophilic and lipophilic antioxidant assays were performed together for the first time in P. americana by-products, and although kernels showed a great antioxidant potential (EC 50 values ranging from 18.1 to 276 μg/mL), peels presented the highest potential (EC 50 ranging from 11.7 to 152 μg/mL), mainly due to the presence of phenolic compounds, and an overall better performance in the antibacterial assays. Further studies needs to be conducted to better understand the correlation between the presence of phenolic compounds and bioactivities, however, the main objective is to implement these biocompounds in different products and industries, due to results obtained, P. americana peels could be a great alternative in the substitution of synthetic antioxidants.

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Section: Peak Tentative Identificationmentioning

confidence: 99%

Bioactive characterization of Persea americana Mill. by-products: A rich source of inherent antioxidants

Melgar

Días

Ćirić

et al. 2018

Industrial Crops and Products

123

View full text Add to dashboard Cite

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“…Xiong et al [92] has established the first quantitative assessments in the water samples using integrated method and reported the total organic carbon (TOC), total suspended solid (TSS) and turbidity of the samples to be 95-630 mg/L, 180-1300 mg/L and 150-1900 NTU, respectively. The integrated method has also been used to reduce peroxidase activity in red beet stalks in order to maintain natural pigment stability [93]. Results showed that it achieved more than 99.5% reduction of peroxidase activity and 99.9% reduction in turbidity.…”

Section: Membrane Filtration (Mf) Methodsmentioning

confidence: 99%

Detection of contaminants in water supply: A review on state-of-the-art monitoring technologies and their applications

Zulkifli

Rahim

Lau

2018

Sensors and Actuators B: Chemical

217

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a b s t r a c tWater monitoring technologies are widely used for contaminants detection in wide variety of water ecology applications such as water treatment plant and water distribution system. A tremendous amount of research has been conducted over the past decades to develop robust and efficient techniques of contaminants detection with minimum operating cost and energy. Recent developments in spectroscopic techniques and biosensor approach have improved the detection sensitivities, quantitatively and qualitatively. The availability of in-situ measurements and multiple detection analyses has expanded the water monitoring applications in various advanced techniques including successful establishment in hand-held sensing devices which improves portability in real-time basis for the detection of contaminant, such as microorganisms, pesticides, heavy metal ions, inorganic and organic components. This paper intends to review the developments in water quality monitoring technologies for the detection of biological and chemical contaminants in accordance with instrumental limitations. Particularly, this review focuses on the most recently developed techniques for water contaminant detection applications. Several recommendations and prospective views on the developments in water quality assessments will also be included.

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“…The assay of POD activity used guaiacol as a substrate, because the rate of formation of oxidized guaiacol is a measure of POD activity in a spectrophotometric analysis (Neelwarne and Rudrappa 2013). The activity of the peroxidase enzyme in each extract was determined with a UV/VIS spectrophotometer (Agilent 8453) according to the method described by Vetal and Rathod (2015), with some modifications as described by Santos et al (2016). The assay was performed in duplicate and the results were expressed in % RA-residual activity of POD, which is calculated using Eq.…”

Section: Peroxidase Activitymentioning

confidence: 99%

“…They obtained a D value of POD inactivation after a long processing time of 74.6 min. Moreover, Santos et al (2016), used microfiltration combined with ultrafiltration to reduce the POD activity by 99.5%. However, the authors reported that there was significant reduction in the concentration of betalains due to permeate flux reduction and fouling phenomenon during the membrane separation process.…”

Section: Introductionmentioning

confidence: 99%

Effect of thermal and high pressure processing on stability of betalain extracted from red beet stalks

et al. 2017

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Red beet stalks are a potential source of betalain, but their pigments are not widely used because of their instability. In the present work, the applicability of high pressure processing (HPP) and high temperature short time (HTST) thermal treatment was investigated to improve betalain stability in extracts with low and high concentrations. The HPP was applied at 6000 bar for 10, 20 and 30 min and HTST treatment was applied at 75.7 °C for 80 s, 81.1 °C for 100 s and 85.7 °C for 120 s, HPP treatment did not show any improvement in the betalain stability. In turn, the degradation rate of the control and the HTST thermal treatment at 85.7 °C for 120 s of the sample with high initial betalain concentration were 1.2 and 0.4 mg of betanin/100 ml of extract per day respectively. Among the treatments studied, HTST was considered the most suitable to maintain betalain stability from red beet stalks.

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Clarification of red beet stalks extract by microfiltration combined with ultrafiltration

Cited by 22 publications

References 21 publications

Bioactive characterization of Persea americana Mill. by-products: A rich source of inherent antioxidants

Bioactive characterization of Persea americana Mill. by-products: A rich source of inherent antioxidants

Detection of contaminants in water supply: A review on state-of-the-art monitoring technologies and their applications

Effect of thermal and high pressure processing on stability of betalain extracted from red beet stalks

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