Valorization of Aloe vera Skin By-Products to Obtain Bioactive Compounds by Microwave-Assisted Extraction: Antioxidant Activity and Chemical Composition

Solaberrieta, Ignacio; Jiménez, Alfonso; Garrigós, María Carmen

doi:10.3390/antiox11061058

Cited by 20 publications

(13 citation statements)

References 88 publications

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“…Similar TGA results were reported in natural extracts from Aloe vera leaves [93] or Yerba mate [94]. According to Figure 4, the first degradation step could be associated with the degradation of some low molecular weight components of TSE, such as those described in Table 6.…”

Section: Thermal Propertiessupporting

confidence: 82%

Recovery of Antioxidants from Tomato Seed Industrial Wastes by Microwave-Assisted and Ultrasound-Assisted Extraction

Solaberrieta

Mellinas

Jiménez

et al. 2022

Foods

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Tomato seed (TS) wastes are obtained in large amounts from the tomato processing industry. In this work, microwave-assisted extraction (MAE) and ultrasound-assisted extraction (UAE) of antioxidant compounds from TS were optimized by using response surface methodology. The effect of MAE and UAE main extraction parameters was studied on total phenolic content (TPC) and antioxidant activity (DPPH) responses. Antioxidant, structural, morphological, and thermal properties of MAE and UAE extracts were evaluated. A great influence of ethanol concentration was observed in both extraction methods. Optimal MAE conditions were determined as 15 min, 80 °C, 63% ethanol and 80 mL, with a desirability value of 0.914, whereas 15 min, 61% ethanol and 85% amplitude (desirability = 0.952) were found as optimal conditions for UAE. MAE extracts exhibited higher TPC and antioxidant activity values compared to UAE (1.72 ± 0.04 and 1.61 ± 0.03 mg GAE g TS−1 for MAE and UAE, respectively). Thermogravimetric analysis (TGA) results suggested the presence of some high molecular weight compounds in UAE extracts. Chlorogenic acid, rutin and naringenin were identified and quantified by HPLC-DAD-MS as the main polyphenols found by MAE and UAE, showing MAE extracts higher individual phenolics content (1.11–2.99 mg 100 g TS−1). MAE and UAE have shown as effective green techniques for extracting bioactive molecules with high antioxidant activity from TS with high potential to be scaled-up for valorizing of TS industrial wastes.

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Section: Thermal Propertiessupporting

confidence: 82%

Recovery of Antioxidants from Tomato Seed Industrial Wastes by Microwave-Assisted and Ultrasound-Assisted Extraction

Solaberrieta

Mellinas

Jiménez

et al. 2022

Foods

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“…AQP showed a three-dimensional pentagon structure that has not been reported previously. However, bioactive components obtained from aloe vera skin showed some resemblance to the previous literature [27]. FDP showed a morphology with thin walls intersecting a three-dimensional array that repeats along the spongy surface with some holes and cracks.…”

Section: Sem Images Of Microcapsules During In Vitro Digestionmentioning

confidence: 50%

The Release Behavior of Anthraquinones Encapsulated into Casein Micelles during In Vitro Digestion

Sadiq

Shahid

Gill

et al. 2023

Foods

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The degradation of anthraquinones extracted from aloe vera plants can be prevented by encapsulating them in casein micelles (CMs). The oral, gastric, and intestinal digestion behavior of spray-dried microcapsules of casein micelles loaded with aloe vera-extracted anthraquinone powder (CMAQP), freeze-dried powder (CMFDP), and whole-leaf aloe vera gel (CMWLAG) obtained through ultrasonication was investigated. The results found that CMAQP and CMFDP dissolved slowly and coagulated into large curds during gastric digestion, improving the retention of anthraquinones in the digestive tract. In contrast, CMWLAG structure was destroyed and increased amounts of anthraquinones were released during oral and gastric digestion phases, indicating increased amounts of surface anthraquinones instead of the encapsulation of anthraquinones in the interior of CMs. The strong hydrophobic interactions protected anthraquinones within the core of CM for CMAQP and delayed diffusion. However, during SIF digestion, both CMAQP and CMFDP released significant amounts of anthraquinones, although CMAQP showed a much more controlled release for both aloin and aloe-emodin over SIF digestion time. The release behavior of anthraquinones from CM microcapsules was a function of the type of anthraquinone that was used to encapsulate. The present study provides insight into the release behavior of loaded bioactive compounds using food-grade CMs as the wall material during in vitro digestion and highlights the importance of the type of bioactive component form that will be encapsulated.

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“…It is also an option in toothpaste considering its antimicrobial potential on oral microorganisms, such as S. mutans and C. albicans , and improvement in plaque index comparable to those obtained with products with triclosan in their composition ( Lee et al, 2004 ; Pradeep et al, 2012 ; Vajrabhaya et al, 2022 ). The Aloe vera main components are aloin A, aloin B, aloesin, aloe-emodin, aloeresin D, orientin, cinnamic acid, and chlorogenic acid ( Solaberrieta et al, 2022 ). Among them, the antibacterial mechanism of aloe-emodin was determined on Staphylococcus epidermidis .…”

Section: Discussionmentioning

confidence: 99%

Antimicrobial activity of Desplac® oral gel in the subgingival multispecies biofilm formation

Bueno-Silva,

Kiausinus,

Gonçalves

et al. 2023

Front. Microbiol.

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Natural products are well-known due to their antimicrobial properties. This study aimed to evaluate the antimicrobial effect of Desplac® product (composed of Aloe Vera, Propolis Extract, Green Tea, Cranberry, and Calendula) on the subgingival biofilm. Two different protocols were used to treat the 33-species biofilms: (A) 2×/day (12/12 h) for 1 min with Desplac® or Noplak Toothpaste (Chlorhexidine + Cetylpyridinium Chloride) or Oral B ProGengiva (stannous Fluoride) or a placebo gel; (B) a 12-h use of the Desplac® product or 0.12% chlorhexidine gel or a placebo gel. After 7 days of biofilm formation, the metabolic activity (MA) and biofilm profile were determined by 2,3,5-triphenyltetrazolium chloride and Checker-board DNA–DNA hybridization, respectively. Statistical analysis used the Kruskal-Wallis test followed by Dunn’s post-hoc. In protocol A, all treatments presented reduced MA compared to the placebo (p ≤ 0.05). The Desplac®-treated biofilm showed a similar microbial profile to other antimicrobials, although with higher bacterial total counts. In protocol B, MA of Desplac®-treated biofilms was lower than the placebo’s MA but higher than chlorhexidine-treated biofilms (p ≤ 0.05). Pathogen levels in Desplac®-treated biofilms were lower than in placebo-treated biofilms and elevated compared to the chlorhexidine-treated biofilms (p ≤ 0.05). Desplac® inhibited the biofilm development and disrupted the mature subgingival biofilm, highlighting its effect on Tannerella forsythia counts.

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Valorization of Aloe vera Skin By-Products to Obtain Bioactive Compounds by Microwave-Assisted Extraction: Antioxidant Activity and Chemical Composition

Cited by 20 publications

References 88 publications

Recovery of Antioxidants from Tomato Seed Industrial Wastes by Microwave-Assisted and Ultrasound-Assisted Extraction

Recovery of Antioxidants from Tomato Seed Industrial Wastes by Microwave-Assisted and Ultrasound-Assisted Extraction

The Release Behavior of Anthraquinones Encapsulated into Casein Micelles during In Vitro Digestion

Antimicrobial activity of Desplac® oral gel in the subgingival multispecies biofilm formation

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