Effect of inhibitory compounds found in biomass hydrolysates on growth and xylose fermentation by a genetically engineered strain of S. cerevisiae

Helle, Steve S.; Cameron, David; Lam, Janet; White, B.D.; Duff, Sheldon J.B.

doi:10.1016/s0141-0229(03)00214-x

Cited by 148 publications

(104 citation statements)

References 19 publications

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“…The content of HMF on neutralization and overliming with NH 4 OH was 1.89 and 1.87 g/kg hydrolysate respectively. HMF at a concentration of 1 g/l was able to inhibit fermentation by S. cerevisiae [19], while the presence of salt resulted in increased osmotic pressure and the ions can provide resistance effect if the concentration was high [20].…”

Section: Fermentation Processmentioning

confidence: 99%

Bioethanol Production from Seaweed Eucheuma cottonii by Neutralization and Detoxification of Acidic Catalyzed Hydrolysate

Fakhrudin¹,

Setyaningsih²,

Rahayuningsih³

2014

IJESD

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Section: Fermentation Processmentioning

confidence: 99%

Bioethanol Production from Seaweed Eucheuma cottonii by Neutralization and Detoxification of Acidic Catalyzed Hydrolysate

Fakhrudin¹,

Setyaningsih²,

Rahayuningsih³

2014

IJESD

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“…Saccharification of biomass with enzymes is negatively affected by the presence of acetyl esters (Selig et al, 2009). However, even more importantly, the released acetate and conversion products of acetate are inhibitory to the organisms used to ferment sugars into ethanol and other products (Helle et al, 2003;Carroll and Somerville, 2009).…”

mentioning

confidence: 99%

Loss-of-Function Mutation of REDUCED WALL ACETYLATION2 in Arabidopsis Leads to Reduced Cell Wall Acetylation and Increased Resistance to Botrytis cinerea

et al. 2011

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Nearly all polysaccharides in plant cell walls are O-acetylated, including the various pectic polysaccharides and the hemicelluloses xylan, mannan, and xyloglucan. However, the enzymes involved in the polysaccharide acetylation have not been identified. While the role of polysaccharide acetylation in vivo is unclear, it is known to reduce biofuel yield from lignocellulosic biomass by the inhibition of microorganisms used for fermentation. We have analyzed four Arabidopsis (Arabidopsis thaliana) homologs of the protein Cas1p known to be involved in polysaccharide O-acetylation in Cryptococcus neoformans. Loss-of-function mutants in one of the genes, designated REDUCED WALL ACETYLATION2 (RWA2), had decreased levels of acetylated cell wall polymers. Cell wall material isolated from mutant leaves and treated with alkali released about 20% lower amounts of acetic acid when compared with the wild type. The same level of acetate deficiency was found in several pectic polymers and in xyloglucan. Thus, the rwa2 mutations affect different polymers to the same extent. There were no obvious morphological or growth differences observed between the wild type and rwa2 mutants. However, both alleles of rwa2 displayed increased tolerance toward the necrotrophic fungal pathogen Botrytis cinerea.

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“…Total cumulative biogas yield per unit TS 3% acetic acid, 5% acetic acid, and without pretreatment respectively by 21.85 ml; 12.14 ml; and 29.51 ml.In research Tutt et al [7] suggest that nitric acid excellent in removing cellulose and hemicellulose, but generates byproducts that are difficult to be removed so that it has a greater negative impact on fermentation. Another study by Helle et al (14), states that the formation of by-products such as acetic acid during pretreatment which then inhibit the fermentation process. In the previous research explains that the process of delignification, the acid will cause the structure of lignin and hemicellulose which binds cellulose will be condensed and settles so that the cellulose will be free structure that is separate from the lignin and hemicellulose then will facilitate the access of enzymes or microorganisms to convert cellulose to be monomers sugar as a nutrient for fermentation biogas [15].…”

Section: The Effect Of Nitric Acid Pretreatmentmentioning

confidence: 99%

The Effect of Acid Pre-Treatment using Acetic Acid and Nitric Acid in The Production of Biogas from Rice Husk during Solid State Anaerobic Digestion (SS-AD)

et al. 2018

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Abstract. Pretreatment during biogas production aims to assist in degradation of lignin contained in the rice husk. In this study, pretreatment which is used are acid and biological pretreatment. Acid pretreatment was performed using acetic acid and nitric acid with a variety levels of 3% and 5%. While biological pretreatment as a control variable. Acid pretreatment was conducted by soaking the rice straw for 24 hours with acid variation. The study was conducted using Solid State Anaerobic Digestion (SS-AD) with 21% TS. Biogas production was measured using water displacement method every two days for 60 days at room temperature conditions. The results showed that acid pretreatment gave an effect on the production of biogas yield. The yield of the biogas produced by pretreatment of acetic acid of 5% and 3% was 43.28 and 45.86 ml/gr.TS. While the results without pretreatment biogas yield was 29.51 ml/gr.TS. The results yield biogas produced by pretreatment using nitric acid of 5% and 3% was 12.14 ml/gr.TS and 21.85 ml/gr.TS. Results biogas yield with acetic acid pretreatment was better than the biogas yield results with nitric acid pretreatment.

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Effect of inhibitory compounds found in biomass hydrolysates on growth and xylose fermentation by a genetically engineered strain of S. cerevisiae

Cited by 148 publications

References 19 publications

Bioethanol Production from Seaweed Eucheuma cottonii by Neutralization and Detoxification of Acidic Catalyzed Hydrolysate

Bioethanol Production from Seaweed Eucheuma cottonii by Neutralization and Detoxification of Acidic Catalyzed Hydrolysate

Loss-of-Function Mutation of REDUCED WALL ACETYLATION2 in Arabidopsis Leads to Reduced Cell Wall Acetylation and Increased Resistance to Botrytis cinerea

The Effect of Acid Pre-Treatment using Acetic Acid and Nitric Acid in The Production of Biogas from Rice Husk during Solid State Anaerobic Digestion (SS-AD)

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