Characterization of the bark from residues from mate tree harvesting (Ilex paraguariensis St. Hil.)

Pagliosa, Cristiane Manfé; Simas, Karina Nunes de; Amboni, Renata Dias de Mello Castanho; Murakami, Aureanna Nairne Negrão; Petkowicz, Carmen Lúcia de Oliveira; Medeiros, João de Deus; Rodrigues, Ana Cláudia; Amante, Edna Regina

doi:10.1016/j.indcrop.2010.06.010

Cited by 16 publications

(12 citation statements)

References 19 publications

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“…18,19 Yields in xylose (aqueous phase) and lignin (organic phase) were in the same range as values obtained for beech wood, and the Scheme 1 The concept of the OrganoCat process for the integrated fractionation of lignocellulose to provide directly processable streams of xylose, cellulose pulp, and lignin. 7 wt% in I. paraguariensis, 21 it can be concluded that the xylose production was nearly quantitative and lignin recoveries were also in the same range as those obtained for beech wood. Similarly, the post-brewed Mate tea leaves could be used directly after drying under the standard conditions.…”

Section: Experimental Studysupporting

confidence: 69%

Fractionation of lignocellulosic biomass using the OrganoCat process

et al. 2015

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The fractionation of lignocellulose in its three main components, hemicellulose, lignin and cellulose pulp can be achieved in a biphasic system comprising water and bio-based 2-methyltetrahydrofuran (2-MeTHF) as solvents and oxalic acid as catalyst at mild temperatures (up to 140°C). This so-called Organo-Cat concept relies on selective hemicellulose depolymerization to form an aqueous stream of the corresponding carbohydrates, whereas solid cellulose pulp remains suspended and the disentangled lignin is to a large extent extracted in situ with the organic phase. In the present paper, it is demonstrated that biomass loadings of 100 g L −1 can be efficiently fractionated within 3 h whereby the mild conditions assure that no significant amounts of by-products (e.g. furans) are formed. Removing the solid pulp by filtration allows to re-use the water and organic phase without product separation in repetitive batch mode. In this way, (at least) 400 g L −1 biomass can be processed in 4 cycles, leading to greatly improved biomass-to-catalyst and biomass-to-solvent ratios. Economic analysis of the process reveals that the improved biomass loading significantly reduces capital and energy costs in the solvent recycle, indicating the importance of process integration for potential implementation. The procedure was successfully scaled-up from the screening on bench scale to 3 L reactor. The feedstock flexibility was assessed for biomasses containing moderate-to-high hemicellulose content.

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Section: Experimental Studysupporting

confidence: 69%

Fractionation of lignocellulosic biomass using the OrganoCat process

et al. 2015

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“…It has also been reported that ADL contains 38.1% protein, 32.7% fat, 4.14% ash, 22.7% carbohydrate and 2.3% moisture [ 33 ]. On the other hand, the positive control, MT contained 13.2% protein, 7.1% lipid, 6.2% ash, 27.2% total sugar, and 5.8% moisture [ 34 ]. Therefore, the ADL administered in this study would have provided greater dietary amounts of both protein and fat than the positive control, MT.…”

Section: Resultsmentioning

confidence: 99%

Allomyrina dichotoma (Arthropoda: Insecta) Larvae Confer Resistance to Obesity in Mice Fed a High-Fat Diet

et al. 2015

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To clarify the anti-obesity effect of Allomyrina dichotoma larvae (ADL), we previously reported that ADL block adipocyte differentiation on 3T3-L1 cell lines through downregulation of transcription factors, such as peroxisome proliferator-activated receptor-γ (PPARG) and CCAAT/enhancer binding protein-α (CEBPA). In this study, we tested whether ADL prevent obesity in mice fed a high-fat diet (HFD) and further investigated the mechanism underlying the effects of ADL. All mice were maintained on a normal-fat diet (NFD) for 1 week and then assigned to one of five treatment groups: (1) NFD; (2) HFD; (3) HFD and 100 mg·kg−1·day−1 ADL; (4) HFD and 3000 mg·kg−1·day−1ADL; or (5) HFD and 3000 mg·kg−1·day−1 yerba mate (Ilex paraguariensis, positive control). ADL and yerba mate were administered orally daily. Mice were fed experimental diets and body weight was monitored weekly for 6 weeks. Our results indicated that ADL reduced body weight gain, organ weight and adipose tissue volume in a dose-dependent manner. Body weight gain was approximately 22.4% lower compared to mice fed only HFD, but the difference did not reach the level of statistical significance. Real-time polymerase chain reaction (PCR) analysis revealed that gene expression levels of PPARG, CEBPA and lipoprotein lipase (LPL) in the epididymal fat tissue of HFD-fed mice receiving 3000 mg·kg−1·day−1 ADL were reduced by 12.4-, 25.7-, and 12.3-fold, respectively, compared to mice fed HFD only. Moreover, mice administered ADL had lower serum levels of triglycerides and leptin than HFD-fed mice that did not receive ADL. Taken together our results suggest that ADL and its constituent bioactive compounds hold potential for the treatment and prevention of obesity.

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“…It is generally consumed as infusion due to its good taste and well-known antioxidant properties [ 32 , 33 ]. Yerba mate is composed from about 35% α-cellulose [ 34 ], 25% hemicellulose [ 34 ] and 25–30% lignin [ 34 , 35 ]. The presence of lignin results in yerba mate containing different amounts of polyphenols (i.e., caffeic and chlorogenic acids) [ 33 ], xanthines (i.e., caffeine and theobromine), flavonoids (i.e., catechin, quercetin, kaempferol and rutin) [ 36 , 37 ], amino acids, saponin and tannins as well as some vitamins (i.e., C, B 1 , and B 2 ) [ 36 , 38 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Iignocellulosic Nanoparticles Extracted from Yerba Mate (Ilex paraguariensis) on the Structural, Thermal, Optical and Barrier Properties of Mechanically Recycled Poly(lactic acid)

et al. 2020

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In this work, yerba mate nanoparticles (YMNs) were extracted from Ilex paraguairiencis yerba mate wastes and further used to improve the overall performance of mechanically recycled PLA (PLAR). Recycled PLA was obtained by melt reprocessing PLA subjected to an accelerated ageing process, which involved photochemical, thermal and hydrothermal ageing steps, as well as a final demanding washing step. YMNs (1 and 3 wt. %) were added to the PLAR during the melt reprocessing step and further processed into films. The main goal of the development of PLAR-YMNs bionanocomposites was to increase the barrier properties of recycled PLA, while showing good overall performance for food packaging applications. Thus, optical, structural, thermal, mechanical and barrier properties were evaluated. The incorporation of YMNs led to transparent greenish PLAR-based films with an effective blockage of harmful UV radiation. From the backbone FTIR stretching region (bands at 955 and 920 cm−1), it seems that YMNs favor the formation of crystalline domains acting as nucleating agents for PLAR. The morphological investigations revealed the good dispersion of YMNs in PLAR when they are used in the lowest amount of 1 wt. %, leading to bionanocomposites with improved mechanical performance. Although the addition of high hydrophilic YMNs increased the water vapor transmission, the addition of 1 wt. % of YMNs enhanced the oxygen barrier performance of the produced bionanocomposite films. These results show that the synergistic revalorization of post-consumer PLA and nanoparticles obtained from agri-food waste is a potential way for the production of promising packaging materials that meet with the principles of the circular economy.

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Characterization of the bark from residues from mate tree harvesting (Ilex paraguariensis St. Hil.)

Cited by 16 publications

References 19 publications

Fractionation of lignocellulosic biomass using the OrganoCat process

Fractionation of lignocellulosic biomass using the OrganoCat process

Allomyrina dichotoma (Arthropoda: Insecta) Larvae Confer Resistance to Obesity in Mice Fed a High-Fat Diet

Effect of Iignocellulosic Nanoparticles Extracted from Yerba Mate (Ilex paraguariensis) on the Structural, Thermal, Optical and Barrier Properties of Mechanically Recycled Poly(lactic acid)

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