Açaí waste valorization via mannose and polyphenols production: techno-economic and environmental assessment

Jorge, Fernanda Thimoteo Azevedo; Silva, Ayla Sant’Ana da; Brigagão, George Victor

doi:10.1007/s13399-022-02681-0

Cited by 8 publications

(6 citation statements)

References 39 publications

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“…However, açaí edible part represents only 15% of the mature fruits' wet weight 4 , whereas the açaí seed accounts for the other 85%. Thus, almost 1.4 million tons of seeds disposed of as agro-industrial waste yearly are discarded as consequence of pulp production, and only a tiny amount of this residue is currently exploited as a co-product in other industries 3,5,6 . As Brazil is the primary açaí producer globally, the seeds' disposal represents a significant environmental, sanitary, and economic issue [6][7][8] .…”

Section: Introductionmentioning

confidence: 99%

Acquiring thin histological sections of açaí (Euterpe oleracea Mart.) seeds for molecular mapping by mass spectrometry imaging

Brum

Martins

Mohana‐Borges

et al. 2022

Preprint

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RATIONALE: Matrix-assisted laser desorption/ionization imaging mass spectrometry (MALDI-IMS) of tissues became popular in the last decade. Consequently, adapting sample preparation methods for different materials turned to be a pivotal step for a successful analysis, due to the requirement of samples slices of 12-20 µm thickness. However, preparing thin sections compatible with MALDI-IMS for unusual samples is challenging, as existing histological protocols may not be suitable, thus requiring new methods. Açaí (Euterpe oleracea Mart.) seed is an example of a challenging material due to its toughness and resistance to crack. Therefore, our goal was to develop a methodology to obtain thin (<20 µm) and entire longitudinal sections of açaí seeds for MALDI-IMS analysis. METHODS: Different strategies were evaluated for obtaining thin cuts of seeds, being the combination of the following steps the most suitable option: (i) softening of seeds by water immersion for 24 h; (ii) longitudinal cut of seeds to obtain half-seeds using a razor blade and a hammer; (iii) half-seeds imbibition in gelatin; (iv) sectioning using a cryostat at -20 °C to obtain samples with <20 µm thickness; and (v) collection of samples in an indium tin oxide coated glass slide covered by a double-face copper tape to avoid sample wrapping and ensure adhesion after unfreezing. (iv) storage of samples in a -80 °C freezer, if necessary. RESULTS: As a result, this adapted sample preparation method enabled the analysis of açaí seeds by MALDI-IMS providing spatial distribution of carbohydrates in the endosperm. CONCLUSIONS: The adaptations developed for sample preparation will help investigate the metabolic and physiological properties of açaí seeds in future studies.

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Section: Introductionmentioning

confidence: 99%

Acquiring thin histological sections of açaí (Euterpe oleracea Mart.) seeds for molecular mapping by mass spectrometry imaging

Brum

Martins

Mohana‐Borges

et al. 2022

Preprint

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“…Most seeds become organic waste, and very few appropriate disposal methods currently exist, resulting in acute environmental and sanitary problems. 4,6,7 In recent years, the hydroethanolic extract of the seeds has attracted attention for exhibiting beneficial pharmacological activities to prevent cardiovascular and metabolic diseases. 8−10 In parallel, a growing number of publications have reported that acai ́seed extract is mainly composed of procyanidins (PCs) 5,11−13 and have correlated their high antioxidant capacity 5,7 to the extract's health benefits and effectiveness on biotechnological applications such as anti-corrosion inhibition.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Açaí is a very appreciated fruit, being commercialized as a “superfruit”, meaning that its consumption is associated with health benefits that are beyond its nutritional value due to high phenolic content and antioxidant proprieties, and it is now an important economic resource of the Amazon region, especially for Pará State, the leading producer of açaí with nearly 90% of the market . Since 2015, the Brazilian açaí production has surpassed 1 million tons/year mark, reaching almost 1.7 million tons in 2020 ().…”

Section: Introductionmentioning

confidence: 99%

“…2 Acai ́is a very appreciated fruit, being commercialized as a "superfruit", meaning that its consumption is associated with health benefits that are beyond its nutritional value due to high phenolic content and antioxidant proprieties, 3 and it is now an important economic resource of the Amazon region, especially for ParáState, the leading producer of acai ́with nearly 90% of the market. 4 Since 2015, the Brazilian acai ́production has surpassed 1 million tons/year mark, 5 reaching almost 1.7 million tons in 2020 (https://sidra.ibge.gov.br/). However, the edible pulp (pericarp) represents at most 15% of the mature fruit's weight, whereas the other 85% is associated with the seed and mesocarpic fiber, residues of the industrial processing of acai ́pulp.…”

Section: ■ Introductionmentioning

confidence: 99%

“…6 Acai ́seeds are treated as an agro-industrial waste, and considering the annual production of acai ́, more than 1.44 million tons of seeds are deposited in the Amazon region yearly. 4 Only a tiny number of seeds are burned for energy production or used as domestic fertilizer and jewelry or roasted to be sold for preparing an infusion beverage, popularly named acai ́coffee. Most seeds become organic waste, and very few appropriate disposal methods currently exist, resulting in acute environmental and sanitary problems.…”

Section: ■ Introductionmentioning

confidence: 99%

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Phenolic Profile and Antioxidant Properties in Extracts of Developing Açaí (Euterpe oleracea Mart.) Seeds

Martins

Mattos

Nascimento

et al. 2022

J. Agric. Food Chem.

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We investigated changes in the phenolic profile and antioxidant properties in the extracts of developing seeds of acai (Euterpe oleracea). Four developmental stages were evaluated, with earlier stages displaying higher antioxidant activity and polyphenols content, while mass spectrometry analysis identified procyanidins (PCs) as the major components of the extracts in all stages. B-type PCs varied from dimers to decamers, with A-type linkages in a smaller number. Extracted PCs decreased in average length from 20.5 to 10.1 along seed development. PC composition indicated that (−)-epicatechin corresponded to over 95% of extension units in all stages, while (+)-catechin presence as the starter unit increased from 42 to 78.8% during seed development. This variation was correlated to the abundance of key enzymes for PC biosynthesis during seed development. This study is the first to report PC content and composition variations during acai ́seed development, which can contribute to studies on the plant's physiology and biotechnological applications.

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Physicochemical characterization of açaí seeds (Euterpe oleracea) from Colombian pacific and their potential of mannan-oligosaccharides and sugar production via enzymatic hydrolysis

Murillo-Franco,

Galvis-Nieto,

Orrego

2023

Biomass Conv. Bioref.

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The study aimed to characterize açaí seeds and explore their potential for producing mannooligosaccharides (MOS) through enzymatic hydrolysis. According to characterization tests by XRD, FTIR, and chemical analysis, acai seeds, a waste material from acai fruit processing, contain significant hemicellulose content, with a main content based on mannan. The study utilized Rohalase®GMP enzyme for hydrolysis and monitored reducing sugars and MOS production (8–10 g MOS/L) hydrolysate with varying lengths, including di-, tri-, tetra-, and pentasaccharide over time. Results showed a concentration plateau of reducing sugars at 13 h and increased MOS until hour nineteen. Mannobiose (M2) was the predominant MOS produced. Comparative analysis with prior research indicated that the açaí seed hydrolysate’s MOS content aligns with that from other sources. Importantly, the study achieved % hydrolysis and MOS yield of 10.79 ± 0.05% and 51.39 ± 0.11 g M2-M5/g mannan, respectively. Açaí seed is a promising source to produce enzymes, biofuels, or thermal energy, as well as highly valued chemical compounds in the industry. This work additionally demonstrates its potential as a sustainable source of valuable MOS, suggesting applications as prebiotics and functional food additives, with implications for various industries seeking eco-friendly alternatives.

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Açaí waste valorization via mannose and polyphenols production: techno-economic and environmental assessment

Cited by 8 publications

References 39 publications

Acquiring thin histological sections of açaí (Euterpe oleracea Mart.) seeds for molecular mapping by mass spectrometry imaging

Acquiring thin histological sections of açaí (Euterpe oleracea Mart.) seeds for molecular mapping by mass spectrometry imaging

Phenolic Profile and Antioxidant Properties in Extracts of Developing Açaí (Euterpe oleracea Mart.) Seeds

Physicochemical characterization of açaí seeds (Euterpe oleracea) from Colombian pacific and their potential of mannan-oligosaccharides and sugar production via enzymatic hydrolysis

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