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31 results for “furfural”
Heterogeneous Biocatalytic Reduction of 5-(Hydroxy)methyl Furfural Using two Co-immobilised Alcohol Dehydrogenases
<p>Biocatalyst heterogenisation may enable robust processes that can be applied in biorefineries to selectively valorise highly functionalised platform chemicals. In this work, we co-immobilise two dehydrogenases and successfully apply them in the selective reduction of 5-hydroxymethylfurfural (HMF) to 2,5-bis(hydroxymethyl) furan (BHMF) with efficient <em>in situ</em> cofactor regeneration. First, we select the best enzyme candidates (an alcohol dehydrogenase from <em>Escherichia coli</em> together with a thermostable glucose dehydrogenase from <em>Bacillus subtilis</em>) and then screen a variety of carriers and chemistries to find the optimal individual immobilisation protocols for each dehydrogenase. As a result, methacrylate carriers (Purolite™) functionalised with either aldehydes or with epoxy and cobalt-chelate groups co-immobilise both enzymes in high yields with a sufficient activity recovery (>20%). These optimal heterogeneous biocatalysts enable the quantitative bio-reduction of HMF to BHMF with >99% selectivity in only fifteen minutes, exhibiting an outstanding reusability of >15 batch cycles with a total volumetric productivity of ∼5 g L<sup>−1</sup> h<sup>−1</sup> of BHMF. Preliminary experiments on a semipreparative scale with HMF loadings of 40 mM also reach high product conversions (86%). Overall, the judicious selection of enzymes, carriers and reaction conditions enables the design of robust biocatalysts that may contribute to paving the way to the valorisation of highly functionalised chemicals in biorefineries.</p>
Research Data for the Journal Article: Metal-free catalytic systems based on imidazolium chloride and strong bases for selective oxidative esterification of furfural to methyl furoate
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A comparative study on the stability of the furfural molecule on the low index Ni, Pd and Pt surfaces
<p>We present a comparative density functional theory investigation of the furfural (Ff ) molecule on the low index Ni, Pd and Pt surfaces to understand its geometrical and electronic properties to gain mechanistic insights into the experimentally measured catalytic reactivities of these metal catalysts. We show that the number of metal d-states, which hybridize with the nearest C and O p-orbitals of the Ff molecule, can be used to explain the stability of the Ff molecule on these surfaces. We find that the hybridization between atoms with higher electronegativity and the metal d-states plays a crucial role in determining the stability of these systems. Furthermore, we also find electron transfer from metal to the Ff molecule on the Ni and Pd surfaces, with a reverse process occurring on the Pt surface.</p>
A comparative study on the stability of the furfural molecule on the low index Ni, Pd and Pt surfaces
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Potencial Antifúngico do Extrato de Arnica Brasileira (Lychnopora ericoides) e Alecrim (Rosmarinus officinalis) no Controle de Malassezia furfur capilar
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Response of ethanologenic E coli strains LY180 and EMFR9 to furfural
GEO Series GSE17786. Escherichia coli; Escherichia coli str. K-12 substr. MG1655. 8 samples. Type: Expression profiling by array.
Clostridium thermocellum Transcriptomic Profiles after Exposure to Furfural or Heat Stress
GEO Series GSE40402. Acetivibrio thermocellus ATCC 27405. 43 samples. Type: Expression profiling by array.
RNA expression for ethanologenic E coli strains LY180, EMFR9 and EMFR35 in the absence and presence of 5mM and 15 mM furfural for 15 min
GEO Series GSE46442. Escherichia coli str. K-12 substr. MG1655; Escherichia coli W. 2 samples. Type: Expression profiling by array.
Investigated the responses of ZM532 and wild-type ZM4 to acetic acid and furfural by using RNA-seq
GEO Series GSE168900. Zymomonas mobilis. 12 samples. Type: Expression profiling by high throughput sequencing.
To study gene expression by xylose fermenting strains in the presence and absence of furfural
GEO Series GSE45273. Saccharomyces cerevisiae. 12 samples. Type: Expression profiling by array.
Doubly vinylogous and doubly rearomative functionalization of 2-alkyl-3-furfurals - computational data
<p>Computational data concerning geometries and energies of substrates, transition states and product for four possible approaches of quinone substrate to enamine. </p>
Adapted Y-50049 vs. Wild type Y-12632 in response to furfural-HMF challenge
GEO Series GSE131713. Saccharomyces cerevisiae. 26 samples. Type: Expression profiling by array.
Transcriptomic Profiles of Xylose-utilizing Zymomonas mobilis 8b to Pretreatment Inhibitor Furfural
GEO Series GSE63540. Zymomonas mobilis. 30 samples. Type: Expression profiling by genome tiling array.
Mining novel gene targets for improving tolerance to furfural and acetic acid in Yarrowia lipolytica using whole-genome clustered regularly interspaced short palindromic repeats interference library [
GEO Series GSE262332. Yarrowia lipolytica. 4 samples. Type: Expression profiling by high throughput sequencing.
RNA expression for ethanologenic E coli strains LY180 and LY180 del yqhC in the absence and presence of furfural
GEO Series GSE17788. Escherichia coli; Escherichia coli str. K-12 substr. MG1655. 4 samples. Type: Expression profiling by array.
Mining novel gene targets for improving tolerance to furfural and acetic acid in Yarrowia lipolytica using whole-genome clustered regularly interspaced short palindromic repeats interference library [
GEO Series GSE262333. synthetic construct. 3 samples. Type: Other.
Late lag phase Inhibitor tolerant NRRL Y-50049 vs WT Y-12632 against furfural and HMF challenge
GEO Series GSE50492. Saccharomyces cerevisiae. 10 samples. Type: Expression profiling by array.
Effect of furfural on the Clostridium beijerinckii NCIMB 8052 transcriptome
GEO Series GSE42597. Clostridium beijerinckii NCIMB 8052. 4 samples. Type: Expression profiling by array.
High-level furfural resistance in S. cerevisiae is based on NADPH-dependent reduction by at least two oxireductases
GEO Series GSE18314. Schizosaccharomyces pombe; Saccharomyces cerevisiae. 13 samples. Type: Expression profiling by array.
Saccharomyces cerevisiae stress responses to HMF and furfural (xylose and glucose) Oct
GEO Series GSE50182. Saccharomyces cerevisiae; Schizosaccharomyces pombe. 12 samples. Type: Expression profiling by array.
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