Characteristics of the Thermal Degradation of Glucose and Maltose Solutions

Woo, Koan Sik; Kim, Ho; Hwang, In Guk; Lee, Sang Hoon; Jeong, Heon Sang

doi:10.3746/pnf.2015.20.2.102

Cited by 74 publications

(42 citation statements)

References 20 publications

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“…The higher level of 3-MCPD in glycerol model systems with the addition of sucrose was consistent with the previous studies [12,13] and was simply caused by the decomposition of sugar with the generation of organic acids (lactic acid, levulinic acid, and formic acid [34]) that lowered pH. Low pH values are a valuable factor contributing to formation of 3-MCPD from chloride ions and glycerol.…”

Section: Effect Of Sweetener On Free 3-mcpd Contentsupporting

confidence: 77%

Mitigation role of erythritol and xylitol in the formation of 3-monochloropropane-1,2-diol and its esters in glycerol and shortbread model systems

Sadowska-Rociek

Cieśłik

Sieja

2017

Eur Food Res Technol

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Section: Effect Of Sweetener On Free 3-mcpd Contentsupporting

confidence: 77%

Mitigation role of erythritol and xylitol in the formation of 3-monochloropropane-1,2-diol and its esters in glycerol and shortbread model systems

Sadowska-Rociek

Cieśłik

Sieja

2017

Eur Food Res Technol

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“…Inhibitory effect of LKE concentration above 60 g/L on growth and lipid accumulation might be attributed to the presence in LKE of some toxical compounds. This is because it has been reported that high temperatures produce unwanted byproducts from some sugars such as glucose, maltose and sucrose, and these by products may negatively affect microbial growth [28,29]. Also, it has been documented that the hydrolysates that are used as fermentation substrate can contain some antimicrobial substances, such as weak acids, furan derivatives, and phenolic compounds generated during the hydrolysis [30].…”

Section: Optimization Of Culture Parameters For Lipid Production In Lmentioning

confidence: 97%

Evaluation of Waste Loquat Kernels as Substrate for Lipid Production by Rhodotorula glutinis SO28

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Yazıcı

Taşkın

et al. 2016

Waste Biomass Valor

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This study was performed to produce lipids from the isolated oleaginous yeast Rhodotorula glutinis SO28 using loquat kernel extract (LKE) as substrate. LKE was prepared using acid hydrolysis and alkaline neutralization steps. Lipid production was performed in shaking flaks culture. Even if LKE was used as a sole source of nutritional substances, it could support cell growth and lipid synthesis in the yeast. Additional carbon, nitrogen and phosphorus sources were found to significantly alter the lipid accumulation potential of the yeast. Optimal concentrations of additional carbon (glucose) and nitrogen (ammonium sulphate) sources for lipid accumulation were determined as 15 and 0.5 g/L, respectively. On the other hand, all the concentrations of additional phosphorus source were found to significantly reduce the lipid accumulation. Optimal incubation time was determined as 132 h. Under the optimized culture conditions, the lipid concentration and lipid content of the yeast were determined as 7.82 g/L and 62 %, respectively. Fatty acid methyl ester analysis exhibited that this yeast strain could produce high proportions of C16:0 and C18 fatty acids, which are ideal for biodiesel production. This is the first report on the use of waste loquat kernels as substrate for microbial lipid production.

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“…The interaction of H 2 SO 4 concentration over time was also significant (p <0.05), but with negative effect. Probably, such phenomenon is due to dehydration of glucose to hydroxymethylfurfural promoted by the acid at the longest reaction times (Siankevich et al, 2014;Woo et al, 2015). In addition, it is probable that the glucose found in the hydrolyzate was the product of the hydrolysis of the starch present in the endocarp, since the β-1,4 glycosidic bonds between the glucose residues that form the cellulose are recalcitrant to the action of dilute acids.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of buriti endocarp as lignocellulosic substrate for second generation ethanol production

Rodrigues

Araújo

Rocha

et al. 2018

Preprint

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The production of lignocellulosic ethanol is one of the most promising alternatives to fossil fuels, however, this technology still faces many challenges related to the viability of the alcohol in the market. In this paper the endocarp of buriti fruit was assessed for ethanol production. The whole fruit was characterized physically and chemically and its endocarp submitted to acid and alkaline pre-treatments, which were optimized through the use of surface response methodology for removal of hemicellulose and lignin, respectively. Abstract 16 The production of lignocellulosic ethanol is one of the most promising alternatives to fossil fuels, 17 however, this technology still faces many challenges related to the viability of the alcohol in the 18 market. In this paper the endocarp of buriti fruit was assessed for ethanol production. The whole 19 fruit was characterized physically and chemically and its endocarp submitted to acid and alkaline 20 pre-treatments, which were optimized through the use of surface response methodology for 21 removal of hemicellulose and lignin, respectively. Hemicellulose content was reduced by 88% 22 after acid pretreatment. Alkaline pre-treatment reduced the lignin content in the recovered 23 biomass from 11.8% to 4.2% and increased the concentration of the cellulosic fraction to 88.5%. 24 The pre-treated biomass was saccharified by the action of cellulolytic enzymes and, in the 25 optimized condition, was able to produce 110 g of glucose per L of hydrolyzate. Alcoholic 26 fermentation of the enzymatic hydrolyzate bio-catalized by Saccharomyces cerevisiae resulted in 27 a fermented medium with 4.3% ethanol and Y P/S of 0.33 . The current configuration of global economic advance has created a growing demand for 33 energy resources to support its maintenance. Additionally, the growth of the human population 34 on the planet, the depletion of fossil fuels and the growing concerns about human impacts on the 35 environment have encouraged the search for renewable sources to the development of green 36 energy production (Singh, Nigam & Murphy, 2011; Sarkar et al., 2012). In this context, 37 lignocellulosic biomasses are a promising feedstock for the production of liquid biofuels, 38 alternative to petroleum based fuels (Cherubini & Ulgiati, 2010). 39The technology for the production of second generation (2G) bioethanol, or 40 lignocellulosic ethanol, has evolved in the last decades and functioning industrial plants already 41 exist in some parts of the world, nevertheless, this biofuel still faces the challenge of feedstock 42 access, supply chain infrastructure, and price competitiveness with the petroleum industry (UNCTAD, 43 2016). 44Lignocellulosic ethanol can be obtained from the fermentation of hexoses and pentoses 45 derived from the polysaccharides that constitute the plants cell wall and require additional 46 operations to those normally used to produce first generation ethanol (Mielenz, 2001). Lignin 47 removal and hemicellulose hydrolysis, followed by cellulose saccharif...

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Characteristics of the Thermal Degradation of Glucose and Maltose Solutions

Cited by 74 publications

References 20 publications

Mitigation role of erythritol and xylitol in the formation of 3-monochloropropane-1,2-diol and its esters in glycerol and shortbread model systems

Mitigation role of erythritol and xylitol in the formation of 3-monochloropropane-1,2-diol and its esters in glycerol and shortbread model systems

Evaluation of Waste Loquat Kernels as Substrate for Lipid Production by Rhodotorula glutinis SO28

Evaluation of buriti endocarp as lignocellulosic substrate for second generation ethanol production

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