Reuse of Different Agroindustrial Wastes: Pinhão and Pecan Nutshells Incorporated into Biocomposites Using Thermocompression

Engel, Juliana Both; Ginity, Marina Mac; Luchese, Cláudia Leites; Tessaro, Isabel Cristina; Spada, Jordana Corralo

doi:10.1007/s10924-020-01696-w

Cited by 24 publications

(14 citation statements)

References 52 publications

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“…Crude fiber (≈ 74% for both varieties) was the main fraction in the residues (Table 2), and according to Engel et al. (2020), the total fiber of pecan nutshells is represented by cellulose (31%), hemicellulose (19%), and lignin (35%).…”

Section: Resultsmentioning

confidence: 75%

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Extraction of phenolic compounds from the shells of pecan nuts with cytotoxic activity through apoptosis against the colon cancer cell line HT‐29

Ribas

Baravalle

Gasser

et al. 2021

Journal of Food Science

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The water extraction of phenolic compounds from two varieties (“Mahan” and “Marameck”) of pecan nutshells (Carya illinoinensis) without and with sonication, varying the solvent/solid ratio (S), the pH, and the refluxing time (t), was studied. Additionally, the in vitro cytotoxicity and the determination of the cell death mechanism of the extracts against the colon cancer cell line HT‐29 were investigated. The content of total phenolic compounds (TPC) of “Marameck” nutshells resulted higher than for the “Mahan” variety, and the pH increase resulted in higher TPC contents for both cultivars. The optimized conditions for TPC extraction without and with sonication resulted: S = 33 ml/g, pH = 12, and t = 9.6 min, and yielded ≈ 70 and 90 mg/g of TPC for “Mahan” and “Marameck” nutshells, respectively. The optimized extracts of pecan nutshells without sonication from both cultivars presented similar cytotoxicity against HT‐29 colon cancer cells (IC50 ≈ 50 µg/ml), higher than for sonicated extracts (IC50 ≈ 88 and 138 µg/ml for “Mahan” and “Marameck,” respectively). Cell death through apoptosis was the main mechanism of cell death induced by the nutshell extracts. Practical Application The extraction of phenolic compounds (TPC) from the residues of two varieties of pecan nutshells (“Mahan” and “Marameck”) was studied. An optimal combination of variables within the pH range that minimizes the solvent‐to‐solid ratio (S) and the time of refluxing (t), saving at the same time, water and energy, was set up. The phenolic compound extracts obtained from the residues of the pecan nuts exhibit cytotoxic effects against colon cancer cells and could be of interest as an alternative treatment of different types of cancer. Additionally, these extracts may be of importance to the food industry as they can be used as antioxidant agents in food formulation. Also, the high levels of anthocyanidins obtained from the pecan nut extracts after proanthocyanidins’ strong acid hydrolysis can be purified and employed as natural red dyes.

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Section: Resultsmentioning

confidence: 75%

“…(2019) and Engel et al. (2020) for the residue of pecan nuts cultivated in Mexico and Brazil, respectively. Crude fiber (≈ 74% for both varieties) was the main fraction in the residues (Table 2), and according to Engel et al.…”

Section: Resultsmentioning

confidence: 99%

Extraction of phenolic compounds from the shells of pecan nuts with cytotoxic activity through apoptosis against the colon cancer cell line HT‐29

Ribas

Baravalle

Gasser

et al. 2021

Journal of Food Science

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“…Pinhao and pecan nutshells were also used for reinforced composites preparation. The pinhao-nutshell-based composite exhibited lower water absorption capacity than the petcan-based one, based on the enhanced hydrophobic character of the pinhao-based composite [ 112 ]. Fibres from tropical maize and sweet sorghum bagasse were also studied as composite additives [ 113 ].…”

Section: Lignocellulosic Materials For the Production Of Biofuels Bio...mentioning

confidence: 99%

Lignocellulosic Materials for the Production of Biofuels, Biochemicals and Biomaterials and Applications of Lignocellulose-Based Polyurethanes: A Review

2022

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The present review is devoted to the description of the state-of-the-art techniques and procedures concerning treatments and modifications of lignocellulosic materials in order to use them as precursors for biomaterials, biochemicals and biofuels, with particular focus on lignin and lignin-based products. Four different main pretreatment types are outlined, i.e., thermal, mechanical, chemical and biological, with special emphasis on the biological action of fungi and bacteria. Therefore, by selecting a determined type of fungi or bacteria, some of the fractions may remain unaltered, while others may be decomposed. In this sense, the possibilities to obtain different final products are massive, depending on the type of microorganism and the biomass selected. Biofuels, biochemicals and biomaterials derived from lignocellulose are extensively described, covering those obtained from the lignocellulose as a whole, but also from the main biopolymers that comprise its structure, i.e., cellulose, hemicellulose and lignin. In addition, special attention has been paid to the formulation of bio-polyurethanes from lignocellulosic materials, focusing more specifically on their applications in the lubricant, adhesive and cushioning material fields. High-performance alternatives to petroleum-derived products have been reported, such as adhesives that substantially exceed the adhesion performance of those commercially available in different surfaces, lubricating greases with tribological behaviour superior to those in lithium and calcium soap and elastomers with excellent static and dynamic performance.

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“…These results indicate that the shell can be used within food packaging materials. The pine crop therefore has huge potential to become a renewable Brazilian biomass resource [148,149] …”

Section: Starch Sourcesmentioning

confidence: 99%

“…The pine crop therefore has huge potential to become a renewable Brazilian biomass resource. [148,149] Figure 5. Amylose and amylopectin structures as found in starch.…”

Section: Pine Nut (Pinhão)mentioning

confidence: 99%

Opportunities for the Use of Brazilian Biomass to Produce Renewable Chemicals and Materials

et al. 2020

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This Review highlights the principal crops of Brazil and how their harvest waste can be used in the chemicals and materials industries. The Review covers various plants; with grains, fruits, trees and nuts all being discussed. Native and adopted plants are included and studies on using these plants as a source of chemicals and materials for industrial applications, polymer synthesis, medicinal use and in chemical research are discussed. The main aim of the Review is to highlight the principal Brazilian agricultural resources; such as sugarcane, oranges and soybean, as well as secondary resources, such as andiroba brazil nut, buriti and others, which should be explored further for scientific and technological applications. Furthermore, vegetable oils, carbohydrates (starch, cellulose, hemicellulose, lignocellulose and pectin), flavones and essential oils are described as well as their potential applications.

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Reuse of Different Agroindustrial Wastes: Pinhão and Pecan Nutshells Incorporated into Biocomposites Using Thermocompression

Cited by 24 publications

References 52 publications

Extraction of phenolic compounds from the shells of pecan nuts with cytotoxic activity through apoptosis against the colon cancer cell line HT‐29

Extraction of phenolic compounds from the shells of pecan nuts with cytotoxic activity through apoptosis against the colon cancer cell line HT‐29

Lignocellulosic Materials for the Production of Biofuels, Biochemicals and Biomaterials and Applications of Lignocellulose-Based Polyurethanes: A Review

Opportunities for the Use of Brazilian Biomass to Produce Renewable Chemicals and Materials

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