scholarly journals Studying and Modeling of the Extraction Properties of the Natural Deep Eutectic Solvent and Sorbitol-Based Solvents in Regard to Biologically Active Substances from Glycyrrhizae Roots

Molecules ◽  
2020 ◽  
Vol 25 (7) ◽  
pp. 1482 ◽  
Author(s):  
Nikolay Boyko ◽  
Elena Zhilyakova ◽  
Anastasiya Malyutina ◽  
Oleg Novikov ◽  
Dmitriy Pisarev ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Quantitative Description ◽  
Deep Eutectic Solvent ◽  
Biologically Active Substances ◽  
Biologically Active ◽  
Molar Ratio ◽  
Regression Equations ◽  
Extraction Properties ◽  
Natural Deep Eutectic Solvent ◽  
Active Substances

The purpose of this work was the studying and modeling of the extraction properties of the sorbitol-based natural deep eutectic solvent (NADES) and sorbitol-based solvents in regard to biologically-active substances (BASs) from Glycyrrhizae roots using theoretical fundamentals based on the laws of statistical physics, thermodynamics, and physical chemistry previously developed by us. In our studies, we used Glycyrrhizae roots, simple maceration, plant raw material:solvent ratio 1:10 w/v, temperature 25 °C, extraction time 24 h; standards of licuroside and glycyram; RP HPLC, differential scanning calorimetry, integral dielectric, impedance and conductivity spectroscopy method of analysis; the following solvents: sorbitol-based NADES sorbitol:malic acid:water (1:1:3 in molar ratio), a modified solvent based on NADES sorbitol:malic acid:water:glycerin (1:1:1:1 in molar ratio) and sorbitol-based solvents sorbitol:ethanol:water at different ratios. It has been found that regression equations for sorbitol-based solvents in coordinates predicted by the theory have a high value of determination coefficient that equals to R2e = 0.993 for glycyram and R2e = 0.976 for licuroside. It has been found that the extraction properties of sorbitol-based NADES with a dielectric constant (ε) equal to 33 ± 2 units are equivalent to those of the sorbitol:ethanol:water solvent with ε = 34 units, and the extraction properties of modified solvent based on NADES with ε = 41 ± 2 units are inferior to those of the sorbitol-ethanol-water solvents with maximum value of BASs yield with the dielectric constant range 40 ÷ 50 units. The theoretical fundamentals suggested provide a possibility for an explanation of the mechanism, quantitative description of the extraction properties of the solvent, and target search of the optimal solvent by its dielectric constant.

scholarly journals THE CONTENT OF BIOLOGICALLY ACTIVE SUBSTANCES WATER-ALCOHOL EXTRACTS OF ASPEN BARK

2020 ◽  
pp. 373-380
Author(s):  
Svetlana Vital'yevna Soboleva ◽  
Valeriy Mikhaylovich Voronin ◽  
Ol'ga Aleksandrovna Esyakova
Keyword(s):  
Raw Materials ◽  
Biologically Active Substances ◽  
Biologically Active ◽  
Bark Extract ◽  
Regression Equations ◽  
Toxicological Studies ◽  
Extractive Substances ◽  
Phenolic Group ◽  
Ethanol Extracts ◽  
Active Substances

The aim of this work was to study the bark of aspen growing in the suburban area of Krasnoyarsk and obtain water-ethanol extracts based on it, with different growth-regulating activity. The paper deals with the possible processing of aspen bark with the release of biologically active substances of the phenolic group. Water-ethanol solutions of aspen bark of different concentrations were used as an extractant. The regression equations and the optimum conditions of extraction of the bark of aspen with the allocation of the maximum amount of extractives. Studies have shown that aspen bark contains a variety of groups of biologically active substances, including phenolic group: tannins (tannins from 17.0 to 18.0%) polyphenols (glycosides – 0.71–0.84%), flavonoids – 0.33–0.43%; pigments: (chlorophylls from 0.63 to 0.74%; carotenoids (from 0.52 to 0.55%). The obtained mathematical models were adequate to the studied processes at 95% confidence probability. The optimal values for maximum extraction of extractive substances: the concentration of ethanol was 65%; the duration of the process – 3.5 hours, hydro – 15. In the optimal mode was obtained aspen bark extract, its characteristics coincide with the requirements of TU 9377-162-20680882-10 "raw Materials for the production of biologically active additives "aspen bark Extract "thick". It was established that water-ethanol extracts of aspen bark have depending on the concentration of growth-inhibiting or stimulating activity. In the range of concentrations from 0.1 to 10 g/l, they have an inhibitory effect, with further dilution from 1∙10-2 to 1∙10-4 g/l, a stimulating effect is observed. The tendency of increasing the growth of seedlings of cereals, %: corn – 30, barley – 40 and wheat – 35; legumes, %: peas – 35, beans – 45 and lentils – 25 compared with the control at a concentration of extractive substances of aspen bark 1∙10-3 g/l. the Data obtained may be useful after appropriate sanitary-toxicological studies to increase the germination and germination of seeds of legumes and cereals.

Microscopic fungi of lithobiont communities of Argentine Islands Region: Data from the 22nd Ukrainian Antarctic Expedition

2020 ◽  
Vol 62 (1-2) ◽  
pp. 49-68
Author(s):  
T. O. Kondratiuk ◽  
T. V. Beregova ◽  
I. Yu. Parnikoza ◽  
S. Y. Kondratyuk ◽  
A. Thell
Keyword(s):  
Filamentous Fungi ◽  
Mucor Circinelloides ◽  
Biologically Active Substances ◽  
Biologically Active ◽  
Microscopic Fungi ◽  
Rhodotorula Rubra ◽  
Yeast Fungi ◽  
Antarctic Expedition ◽  
Geomyces Pannorum ◽  
Active Substances

The identification of the diversity of microscopic fungi of lithobiont communities of the Argentine Islands in specimens collected during the 22nd Ukrainian Antarctic Expedition was the purpose of this work. Samples of rock, soil, mosses and lichens of rock micro-habitats of “Crustose lichen sub-formation and fruticose lichen and moss cushion sub-formation” were used in the work. These samples were used for extracting and cultivation of filamentous fungi on dense nutrient media. Determination of physiological and biochemical characteristics and identification of yeast-like fungi were performed using a microbiological analyser ‘Vitek-2’ (‘Bio Merieux’, France). Cultivation of microorganisms was carried out at temperatures from +2 to +37 °C. In results cultures of microscopic fungi of Zygomycota (Mucor circinelloides), Ascomycota (species of the genera cf. Tlielebolus, Talaromyces), representatives of the Anamorphic fungi group (Geomyces pannorum, species of the genera Alternaria, Acremonium, Aspergillus, Penicillium, and Cladosporium) were isolated from Antarctic samples. Microscopic fungi Penicillium spp. were dominated after the frequency in the studied samples (54.5%). Rhodotorula rubra and Candida sp. among isolated yeast fungi, and dark pigmented fungi represented by Aureobasidium pulhdans and Exophiala spp. were identified. The biological properties of a number of isolated fungi (the potential ability to synthesise important biologically active substances: melanins, carotenoids, lipids) are characterised. Mycobiota of rock communities of Argentine Islands is rich on filamentous and yeast fungi similarly to other regions of Antarctica. A number of fungi investigated are potentially able to synthesise biologically active substances. The dark pigmented species of the genera Cladosporium, Exophiala, Aureobasidium pulhdans, capable of melanin synthesis; ‘red’ yeast Rhodotorula rubra (carotenoid producers and resistant to toxic metals); Mucor circinelloides and Geomyces pannorum, lipid producers, are among these fungi. Yeast-like fungi assimilated a wide range of carbohydrates, which will allow them to be further used for cultivation in laboratory and process conditions. The collection of technologically promising strains of microorganisms, part of the Culture Collection of Fungi at Taras Shevchenko National University of Kyiv (Ukraine), is updated with isolated species (strains) of filamentous fungi and yeast – potential producers of biologically active substances, obtained within this study.

The content of decenoic acids in drone brood preparations and combined preparations based on it

Biomics ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 389-393
Author(s):  
D.V. Mitrofanov ◽  
N.V. Budnikova
Keyword(s):  
Royal Jelly ◽  
Storage Conditions ◽  
Water Soluble ◽  
Biologically Active Substances ◽  
Biologically Active ◽  
Strict Adherence ◽  
Drone Brood ◽  
Wide Range ◽  
Active Substances ◽  
Melanin Complex

The drone brood contains a large number of substances with antioxidant activity. These substances require stabilization and strict adherence to storage conditions. Among these substances are unique decenoic acids, the content of which is an indicator of the quality of drone brood and products based on it. The ability of drone brood to reduce the manifestations of oxidative stress is shown. There are dietary supplements for food and drugs based on drone brood, which are used for a wide range of diseases. Together with drone brood, chitosan-containing products, propolis, royal jelly can be used. They enrich the composition with their own biologically active substances and affect the preservation of the biologically active substances of the drone brood. Promising are the products containing, in addition to the drone brood, a chitin-chitosan-melanin complex from bees, propolis, royal jelly. The chitin-chitosan-melanin complex in the amount of 5% in the composition of the adsorbent practically does not affect the preservation of decenic acids, while in the amount of 2% and 10% it somewhat worsens. The acid-soluble and water-soluble chitosan of marine crustaceans significantly worsens the preservation of decenoic acids in the product. Drone brood with royal jelly demonstrates a rather high content of decenoic acids. When propolis is introduced into the composition of the product, the content of decenoic acids increases according to the content of propolis.

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