Xylose is a kind of pentose; its molecular formula is C 5 H 10 O 5 and its structural formula is shown in Fig. 6.2. Hemicellulose is a polysaccharide of d-xylose in nature. The industrial production of xylose has been gradually maturing. Xylose is often used as a food sweetener and is the source of xylitol.

Xylose is the supreme and most attractive sugar obtained from hemicellulosic fraction of lignocellulosic biomass. Biological processes that use pentose-rich biomass as the sole carbon source will help to minimise raw material prices while also ensuring process sustainability.

Xylose as a nectar sugar: from biochemistry to ecology. Sue Jackson, Susan W. Nicolson, in Comparative Biochemistry and Physiology Part B: Biochemistry and Molecular Biology, 2002. Xylose is also found as a monosaccharide in the nectar of Protea and Faurea, two closely-related genera with a widespread distribution in sub-Saharan Africa. They ...

2025年2月1日 · Xylose, the second most abundant component of second-generation biomass, presents tremendous opportunities for sustainable biomanufacturing. [54] However, the atomic economy of xylose for producing C3 chemicals is much lower than glucose. This limitation can be addressed by coupling xylose with third-generation biomass C1 compounds.

Xylose is metabolized primarily through three distinct pathways: (i) the isomerase pathway, (ii) the oxidoreductase pathway, and (iii) the oxidative pathway. The xylose metabolic network is depicted in Fig. 1 (Domingues et al., 2021). The isomerase pathway is typically utilized by prokaryotes, such as E. coli, Bacillus sp., and Lactobacillus sp ...

2019年8月1日 · The RE end segment turns into xylose and dehydrated xylose I5, and the NR end segment converts into dehydrated xylose I10, xylose, d-xylose and five-membered intermediate I2. The activation free energy of Reaction 5' is the highest among these reactions, indicating the hydrolysis is very difficult at fast pyrolysis condition.

The xylose isomerase converts the sugar into xylulose, which can be metabolized by the yeast. Once this was accomplished, oxygen-limited and anaerobic batch enrichment in the presence of high-xylose concentrations led to the selection of mutants that grew faster on xylose and eventually they ended up with a mutant that grew anaerobically on xylose.

2021年6月1日 · A typical xylose rich hydrolysate composition, as given in Table 3, is generated from different biomass types such as corn fiber, soy hulls, and bagasse (that are rich in xylose) in either a single-stage /two-stage hydrolysis [10], [11] to first extract arabinose and then xylose. To this hydrolysate, a boron reagent (e.g., PBA – phenylboronic ...

2019年6月1日 · Besides xylose assimilation, the activation of native cell metabolism to boost xylose utilization remains as a big challenge during yeast engineering [25]. Among these pathways, Dahms or X-1-P/R-1-P pathway has the significant stoichiometric advantage regarding the synthesis of the C2 chemicals, due to directly cleave C5 molecules ( Figure 1 ...

2024年5月1日 · Lu et al. [17] investigated the continuous conversion of xylose to furfural in water using SO 2− 4 /γ-Al 2 O 3 and HND-580 as mixed solid acid catalysts. Gong et al. [18] proposed a reaction pathway for the preparation of furfural by co-catalytic dehydration of xylose with SO 2 − 4 /SnO 2-SSXR and ChCl-MAA. Among them, the catalysts were ...