[Influence of essential oils of plants on the psycho-emotional state of elderly people.].

The possibility of improving the psycho-emotional state of the elderly by inhaling the vapors of essential oils (EO) of plants at a low concentration (1 mg/m3 of air) has been established. To obtain a quick short-term result, mainly in terms of psychological well-being, EOs of coriander and mountain savory are most suitable. A distant, but more pronounced result in terms of both psychological well-being and psychological tone is given by EO of hyssop officinalis and clove tree.

The role of intracellular β-glucosidase in cellulolytic response induction in filamentous fungus Penicillium verruculosum.

In this study, CRISPR/Cas9 genome editing was used to knockout the bgl2 gene encoding intracellular β-glucosidase filamentous fungus Penicillium verruculosum. This resulted in a dramatic reduction of secretion of cellulolytic enzymes. The study of P.

Morpho-chemical characterization of individual ancient starches retrieved on ground stone tools from Palaeolithic sites in the Pontic steppe.

Despite the extensive literature on the retrieval of digestible starches from archaeological contexts, there are still significant concerns regarding their genuine origin and durability. Here, we propose a multi-analytical strategy to identify the authenticity of ancient starches retrieved from macrolithic tools excavated at Upper Paleolithic sites in the Pontic steppe. This strategy integrates the morphological discrimination of starches through optical microscopy and scanning electron microscopy with single starch chemo-profiling using Fourier transform infrared imaging and microscopy.

Flexibility of active center affects thermostability and activity of Penicillium canescens xylanase E.

Xylanases are used in several industrial applications, such as feed additives, the bleaching of pulp and paper, and the production of bread, food, and drinks. Xylanases are required to remain active after heat treatment at 80-90 °C for 30 s to several minutes due to the conditions of feed pelleting. Also, xylanases need to be active at 60-70 °C for several hours while bleaching of pulp and paper or manufacturing of bread, food, and drinks is performed.

Combination of 3--Levulinoyl and 6--Trifluorobenzoyl Groups Ensures α-Selectivity in Glucosylations: Synthesis of the Oligosaccharides Related to α-(1 → 3)-d-Glucan.

Stereospecific α-glucosylation of primary and secondary OH-group at carbohydrate acceptors is achieved using glucosyl -phenyl-trifluoroacetimidate (PTFAI) donor protected with an electron-withdrawing 2,4,5-trifluorobenzoyl (TFB) group at O-6 and the participating levulinoyl (Lev) group at O-3. New factors have been revealed that might explain α-stereoselectivity in the case of TFB and pentafluorobenzoyl (PFB) groups at O-6. They are of conformational nature and confirmed by DFT calculations.