The potential benefits of microwave irradiation for fructose dehydration into 5 hydroxymethylfurfural (5-HMF) have been quantified over a sulfonated metal–organic framework (MOF), MIL 101(Cr)-SO3H. effects temperature (140–170 °C), batch time (5–300 min), and catalyst-to-substrate ratio (0.1–0.01 g/g) were systematically mapped. After 10 min (MW) at 140 °C in DMSO–acetone reaction medium, pract...

Biobased furanics like 5-hydroxymethylfurfural (5-HMF) are interesting platform chemicals for the synthesis of biofuel additives and polymer precursors. 5-HMF is typically prepared from C6 ketoses like fructose, psicose, sorbose and tagatose. A known byproduct is 2-hydroxyacetylfuran (2-HAF), particularly when using sorbose and psicose as the reactants. We here report an experimental and kineti...

This work has established the optimum reaction conditions in a biphasic system using microcrystalline cellulose as the raw material, an ionic liquid as the solvent, metal chloride as a catalyst, and an organic solvent as the extraction reagent. The optimum reaction conditions were microcrystalline cellulose:ionic liquid 1:10 (mass ratio), chromium(III) chloride (CrCl3) 6.8 mol% (based on the gl...

Oxidative conversion of 5-hydroxymethylfurfural (HMF) is of biotechnological interest for the production of renewable (lignocellulose-based) platform chemicals, such as 2,5-furandicarboxylic acid (FDCA). To the best of our knowledge, the ability of fungal aryl-alcohol oxidase (AAO) to oxidize HMF is reported here for the first time, resulting in almost complete conversion into 2,5-formylfuranca...

Metal dispersion is key for designing highly active and well-defined catalytic systems. Herein, to shed light on the effects of Nb conversion fructose into HMF, porous silica glasses grafted with niobium oxide were prepared. Preliminary screening was done microwave-assisted 5-hydroxymethylfurfural (HMF) in a biphasic system. The impregnated presented HMF productivities about 10- 20 times higher...

There is a push towards the use of renewable adhesives in particle board manufacturing industry. A remaining barrier for successful implementation carbohydrate-based necessity rapid cure behavior at lower temperatures (105–120 °C). The aim this work was to study effect highly reactive, bio-based 5-Hydroxymethylfurfural (HMF) on speed fructose-bishexamethylenetriamine (BHMT) adhesive. technologi...

background: hydroxymethylfurfural (hmf) is a common maillard reaction product directly formed from dehydration of sugars under acidic conditions during heating and storage in carbohydrate rich foods. the aim of the present study was to detect and quantify the amount of hmf in date syrup by hplc method. in addition, the amount of hmf in date syrup produced by traditional and industrial methods w...

Population growth has created an expanding gap between the supply and demand of both energy and chemicals. Nonrenewable fossil sources, such as coal, natural gas, and petroleum, are the source of nearly 86% of the world’s energy and 96% of its organic chemicals. Diminishing reserves of these sources, rising atmospheric CO2 levels, and socioeconomic concerns require a reduction of our dependence...

Purpose To assess the impact of hypoxia exposure on cellular radiation sensitivity and survival of tumor cells with diverse intrinsic radiation sensitivity under normoxic conditions. Materials and methods Three squamous cell carcinoma (SCC) cell lines, with pronounced differences in radiation sensitivity, were exposed to hypoxia prior, during or post irradiation. Cells were seeded in parallel...