Peach-palm (<i>Bactris gasipaes</i> Kunth.) waste as substrate for xylanase production by <i>Trichoderma stromaticum</i> AM7

Carvalho, Elck Almeida; Nunes, Laís Vieira; Góes, Laís Mendes dos Santos; Silva, Erik Galvão Paranhos da; Franco, Marcelo; Gross, Eduardo; Uetanabaro, Ana Paula Trovatti; Costa, Andréa Miúra da

doi:10.1080/00986445.2018.1425208

Cited by 32 publications

(14 citation statements)

References 38 publications

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“…Nonetheless, treatments without soy flour had lower pH, and it further decreases with time compared to their initial values. This could be inferred to the ratio content of carbon nitrogen which may impart the mycelium growth; so, the pH of the medium does not self-regulate and the fungus cannot control the environment as it occurred at pH above 5.0 (Carvalho et al 2018).…”

Section: Resultsmentioning

confidence: 99%

Enzymatic activities and analysis of a mycelium-based composite formation using peach palm (Bactris gasipaes) residues on Lentinula edodes

Lima

Schoenherr

Magalhães

et al. 2020

Bioresour. Bioprocess.

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By seeding fungus on top of industry residues, a mycelium can grow and form a compact network structure; however, it may not develop due to lack of optimal nutrients from the substrate. Consequently, peach-palm residues can be a potential alternative; so, to test this hypothesis, this work evaluates the effect of peach-palm residues as substrate for the growth of mycelium based on Lentinula edodes. They were also supplemented with cassava bran and various sources of nitrogen-ammonium sulphate, potassium nitrate, and soy flour—to analyse its effects on its physico-chemical, enzymatic activities, and thermal and mechanical properties of the final composite at 12 and 20 days of cultivation. This mycelium was able to grow at optimum source treatment conditions, which depends on the ratio of Carbon to Nitrogen, within only 12 days of inoculation. Furthermore, the enzyme activities directly correlate with the mycelium growth with optimum conditions of pH, water activity, and moisture for L. edodes to grow having lower enzyme activities for a well-developed composite; whereas higher activities were seen for a weakly developed material, and this material demonstrates mechanical and thermal properties similar to common mycelium-based composites. Therefore, this work demonstrates that peach-palm residues can be a potential alternative for mycelium-based composite.

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Section: Resultsmentioning

confidence: 99%

Enzymatic activities and analysis of a mycelium-based composite formation using peach palm (Bactris gasipaes) residues on Lentinula edodes

Lima

Schoenherr

Magalhães

et al. 2020

Bioresour. Bioprocess.

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show abstract

“…Some species of basidiomycetes have a self-regulating pH characteristic, with a tendency to stabilize at an optimum pH value for their growth, regardless of the initial pH value (Mata et al 2016;Chicatto et al 2018); therefore, it might be the reason for the pH growth in treatments containing soy our. Nonetheless, treatments without soy our had lower pH and it further decreases with time compared to their initial values -due to the necessity of nitrogen and carbon tolerable limits for mycelium growth, the pH of the medium does not self-regulate and the fungus cannot control the environment as it occurred at pH above 5.0 (Carvalho et al 2018).…”

Section: Moisture Content (%) Water Activity (Aw) and Phmentioning

confidence: 97%

Enzymatic activities and analysis of a mycelium-based composite formation using peach palm (Bactris gasipaes) residues on Lentinula edodes

Lima

Schoenherr

Magalhaes

et al. 2020

Preprint

View full text Add to dashboard Cite

By seeding fungus on top of industry residues, a mycelium can grow and form a compact network structure; however, it may not develop due to lack of optimal nutrients from the substrate. Consequently, peach palm residues can be a potential alternative; so, to test this hypothesis, this work evaluates the effect of peach palm residues as substrate for the growth of mycelium based on Lentinula edodes . They were also supplemented with cassava bran and various sources of nitrogen – ammonium sulphate, potassium nitrate and soy flour – in order to analyse its effects on its physico-chemical, enzymatic activities and thermal and mechanical properties of the final composite at 12 and 20 days of cultivation. This mycelium was able to grow at optimum source treatment conditions, that depends on the ratio of Carbon to Nitrogen, within only 12 days of inoculation. Furthermore, the enzyme activities directly correlate with the mycelium growth with optimum conditions of pH, water activity and moisture for L. edod es to grow having lower enzyme activities for a well-developed composite; whereas higher activities were seen for a weakly developed material. and this material demonstrate mechanical and thermal properties similar to common mycelium-based composites Therefore, this work demonstrates that peach palm residues can be a potential alternative for mycelium-based composite

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“…Among the bioprocesses, solid state fermentation (SSF) has been intensively investigated, given the undisputed potential of fungi regarding the production of high added value metabolites [4,16,17,18]. As examples of successful application of this technology, there is the production of enzymes such as xylanase by Trichoderma stromaticum [19], xylanase and lipase by P. roqueforti [20], endoglucanase [16], exoglucanase [21] antioxidant compounds [22], vitamins and antibiotics [23] and nutraceutical compounds [24].…”

Section: Introductionmentioning

confidence: 99%

Structural Alterations of Cocoa Shell After Solid State Fermentation With Penicillium Roqueforti

Lessa

Silva

Tavares

et al. 2022

Preprint

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Lignocellulosic residues, such as cocoa bean shell (FI), are generated in large quantities during agro-industrial activities. Proper management of residual biomass through solid state fermentation (SSF) can be effective in obtaining value-added products. The hypothesis of the present work is that the bioprocess promoted by P. roqueforti can lead to structural changes in the cocoa bean shell fibers that confer characteristics of industrial interest. To unveil such changes, the techniques of FTIR, SEM, XRD, TGA/TG were used. After SSF, an increase of 36.6% in the crystallinity index was observed, reflecting the reduction of amorphous components such as lignin in the FI residue. Furthermore, an increase in porosity was observed through the reduction of the 2θ angle, which gives the FF a potential candidate for applications of porous products. The FTIR results confirm the reduction in hemicellulose content after SSF. The thermal and thermogravimetric tests showed an increase in the hydrophilicity and thermal stability of FF (15% decomposition) in relation to the in natura by-product FI (40% decomposition). These data provided important information regarding changes in the crystallinity of the residue, existing functional groups and changes in degradation temperatures. The techniques employed contributed to the understanding of the changes in the lignocellulosic matrix after the fungus growth, as well as the mechanism that helps to propose the total use of the residual solid after fermentation processes.

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Peach-palm (Bactris gasipaes Kunth.) waste as substrate for xylanase production by Trichoderma stromaticum AM7

Cited by 32 publications

References 38 publications

Enzymatic activities and analysis of a mycelium-based composite formation using peach palm (Bactris gasipaes) residues on Lentinula edodes

Enzymatic activities and analysis of a mycelium-based composite formation using peach palm (Bactris gasipaes) residues on Lentinula edodes

Enzymatic activities and analysis of a mycelium-based composite formation using peach palm (Bactris gasipaes) residues on Lentinula edodes

Structural Alterations of Cocoa Shell After Solid State Fermentation With Penicillium Roqueforti

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