{"title":"Examination of the extract from lichen (Cetraria islandica) after an ultrasonic impact","authors":"K. Nitsievskaya, S. Stankevich, E. Boroday","doi":"10.21323/2618-9771-2023-6-2-171-179","DOIUrl":null,"url":null,"abstract":"An integral part of human healthy nutrition is intake of biologically active substances. Extraction is an important stage of isolation of different bioactive substances from plants and effectiveness of their extraction increases with the use of ultrasonic treatment. The aim of this research was to study an effect of different types of aqueous media and treatment methods on Cetraria islandica, including the use of principles of ultrasonic treatment and maceration methods (infusion). The experimental studies consisted in detecting an effect of the active acidity of the aqueous medium (solvent) and method of impact upon extraction on several physicochemical and rheological indicators. The experimental samples of extracts were examined by the following indicators: active acidity and redox potential detected by the ionometric technique; dynamic viscosity and the depth of output of polymeric forms of phenolic substances determined by measuring the optical density and transmission coefficient. Mathematical processing of data using the regression analysis was carried out. The results are presented as graphs, tables and regression equations. It has been established that transfer of substances from Cetraria islandica to its extracts had high results at pH = 7.0 and рН = 9.0 of the solvent. When obtaining extracts by the infusion method, the quantity of polymeric compounds in the transition process was 1.3 times higher than the quantity of monomeric forms of phenolic compounds. The highest value of the dynamic viscosity was revealed in the extract sample obtained by the infusion method in the alkaline medium. The extracts obtained can be used in food system modeling.","PeriodicalId":48958,"journal":{"name":"Agroecology and Sustainable Food Systems","volume":"1 1","pages":""},"PeriodicalIF":2.4000,"publicationDate":"2023-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Agroecology and Sustainable Food Systems","FirstCategoryId":"97","ListUrlMain":"https://doi.org/10.21323/2618-9771-2023-6-2-171-179","RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"AGRICULTURE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
An integral part of human healthy nutrition is intake of biologically active substances. Extraction is an important stage of isolation of different bioactive substances from plants and effectiveness of their extraction increases with the use of ultrasonic treatment. The aim of this research was to study an effect of different types of aqueous media and treatment methods on Cetraria islandica, including the use of principles of ultrasonic treatment and maceration methods (infusion). The experimental studies consisted in detecting an effect of the active acidity of the aqueous medium (solvent) and method of impact upon extraction on several physicochemical and rheological indicators. The experimental samples of extracts were examined by the following indicators: active acidity and redox potential detected by the ionometric technique; dynamic viscosity and the depth of output of polymeric forms of phenolic substances determined by measuring the optical density and transmission coefficient. Mathematical processing of data using the regression analysis was carried out. The results are presented as graphs, tables and regression equations. It has been established that transfer of substances from Cetraria islandica to its extracts had high results at pH = 7.0 and рН = 9.0 of the solvent. When obtaining extracts by the infusion method, the quantity of polymeric compounds in the transition process was 1.3 times higher than the quantity of monomeric forms of phenolic compounds. The highest value of the dynamic viscosity was revealed in the extract sample obtained by the infusion method in the alkaline medium. The extracts obtained can be used in food system modeling.
期刊介绍：
Agroecology and Sustainable Food Systems is devoted to the rapidly emerging fields of agroecology and food system sustainability. By linking scientific inquiry and productive practice with transformative social action, agroecology provides a foundation for developing the alternative food systems of the future. The journal focuses on the changes that need to occur in the design and management of our food systems in order to balance natural resource use and environmental protection with the needs of production, economic viability, food security, and the social well-being of all people.
Agroecology and Sustainable Food Systems examines our current food systems from production to consumption, and the urgent need to transition to long-term sustainability. The journal promotes the study and application of agroecology for developing alternatives to the complex problems of resource depletion, environmental degradation, a narrowing of agrobiodiversity, continued world hunger, consolidation and industrialization of the food system, climate change, and the loss of farm land. The journal uses a food systems approach, and seeks experiences in agroecology that are on-farm, participatory, change-oriented, and backed by broad-based methodologies of sustainability analysis and evaluation.
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