Three varieties of Hibiscus sabdariffa were analyzed for their phytochemical content and inhibitory potential on carbohydrate-digesting enzymes as a basis for selecting a variety for wine production. The dark red variety was chosen as it was highest in phenolic content and an aqueous extract partially inhibited α-glucosidase (maltase), with delphinidin 3-O-sambubioside, cyanidin 3-O-sambubiosid...

Enantioselective hydrolysis of bromo- and methoxy-substituted 1-phenylethanol acetates was conducted using comminuted carrot (Daucus carota L.) and celeriac (Apium graveolens L. var. rapaceum) roots. Hydrolysis of the acetates led to alcohols, preferentially to R-(+)-enantiomers. Efficiencies of both reactions - hydrolysis of the acetates with an electron-donating methoxy group and oxidation of...

Rhodiola rosea is a perennial plant at high altitudes in the Arctic and mountainous regions throughout Europe and Asia. It contains various active compounds e.g. phenylpropanoids, phenylethanol derivatives, flavanoids, monoterpenes, triterpenes, phenolic acids, and essential oils. Salidroside and tyrosol are the major bioactive constituents in Rhodiola rosea. Traditionally, Rhodiola rosea is us...

Flower scent is an important trait of ornamental roses and has been character in the selection processes. In present study, composition volatile organic compounds (VOCs) emitted by both petals pollen 21 garden (Chinensis, Climber, English rose, Floribunda, Hybrid Tea, Multiflora, Damascena, Musk Polyantha, Rugosa Shrub) was investigated through GC-MS Static Headspace method. A total 19 differen...

In situ product recovery (ISPR), in the form of an extractive fermentation process, can increase productivity and titers sustainable production platform chemicals. To establish a guideline for development industrially relevant processes such bio-based compounds, wide screening was performed, mapping potential extensive range solvents solvent mixtures. Besides biocompatibility with Saccharomyces...

In this work, a racemization method of (S)-1-phenylethanol by niobium salts was developed. Among the available, phosphate hydrate (NbOPO4.nH2O) reduced enantiomeric excess (ee) chiral alcohol from 95 to 0% after 24 h at 60 ºC in toluene. This new agent combined with lipase (CALB) order achieve chemoenzymatic dynamic kinetic resolution (DKR). Experiments demonstrated that DKR process is feasible...

BACKGROUND 2-Phenylethanol (2-PE) is an aromatic alcohol with a delicate fragrance of rose petals that widely used in perfumes, cosmetics, foods, beverages, and pharmaceutical industries. The yeast Yarrowia can produce 2-PE through L-Phenylalanine (L-Phe) biotransformation. However, it has not been properly explored this field, despite its interesting characteristics for process, such as the Cr...

The yeast Yarrowia lipolytica is well known for its versatile production of metabolites from various substrates, but, although isolated from, e.g., wild-fermented Belgian Sour beers, it rarely considered a starter culture in fermented beverages. In this study, we aimed to elucidate the ability Y. ferment brewers’ wort containing iso-α-acid 7 days at low and high aeration 20 °C 30 °C, with speci...

Chitosan oligosaccharide (COS), a degradation product of chitosan, is easily accessible, highly bioactive, non-toxic, and well-soluble in water. The effects COS on the qualitative attributes tomato fruits were investigated current study. was administered to plants (Solanum lycopersicum cv. Ruixinghongniu) by foliar spray root irrigation alternate cycles at concentrations 0.5 g·L?1 0.16 g·L?1, r...