ABSTRACT
One of the principal byproducts of coffee roasting is the coffee parchment. It is abundant in bioactive substances, including derivatives of chlorogenic acids, which are well-known for their exceptional antioxidant effects. It is advantageous to use environmentally friendly extraction techniques on such residues since it adds value to the entire coffee production process supply chain. The aim of this work was to assess and enhance the ability of non-conventional extraction techniques to extract derivatives of chlorogenic acid from coffee parchment. A central composite design was used to maximize the recovery of those phenolic compounds. The optimized extraction conditions were with 5 min extraction period, at a temperature of 70 °C, and 80% ethanol in the extractor solvent. In this conditions extraction recovery of chlorogenic acids was of 0.8% by the use of microwave-aided extraction (MAE). The optimized conditions are practical, economical, and ecologically friendly method to extract phenolic compounds and, consequently, underscores the potential for sustainable utilization of coffee parchment, offering a valuable contribution to the development of environmentally conscious strategies within the coffee industry.
Subject(s)
COVID-19 , Pandemics , SARS-CoV-2/genetics , Brazil/epidemiology , COVID-19/epidemiology , COVID-19/virology , HumansABSTRACT
Samples of efavirenz (EFZ) were evaluated to investigate the influence of the micronization process on EFZ stability. A combination of X-ray diffraction, thermal analysis, FTIR, observations of isotropic chemical shifts of (1)H in distinct solvents, their temperature dependence and spin-lattice relaxation time constants (T1), solution (1D and 2D) (13)C nuclear magnetic resonance (NMR), and solid-state (13)C NMR (CPMAS NMR) provides valuable structural information and structural elucidation of micronized EFZ and heptane-recrystallized polymorphs (EFZ/HEPT). This study revealed that the micronization process did not affect the EFZ crystalline structure. It was observed that the structure of EFZ/HEPT is in the same form as that obtained from ethyl acetate/hexane, as shown in the literature. A comparison of the solid-state NMR spectra revealed discrepancies regarding the assignments of some carbons published in the literature that have been resolved.
Subject(s)
Benzoxazines/chemistry , Magnetic Resonance Spectroscopy/methods , Models, Chemical , Models, Molecular , Alkynes , Crystallization , Crystallography, X-Ray , Cyclopropanes , Molecular Structure , SolutionsABSTRACT
O uso da biodiversidade brasileira pela população continua sendo uma das maiores fontes de descoberta de novas entidades químicas bioativas. Este trabalho realizou uma revisão da literatura referente às características botânica, etnobotânica, atividade farmacológica, toxicológica e constituição química das espécies de Eugenia: Eugenia brasiliensis Lam, Eugenia dysenterica DC, Eugenia umbelliflora O. Berg, Eugenia florida DC., Eugenia involucrate DC. e Eugenia uniflora L. Esse estudo descritivo retrospectivo tem como objetivo avaliar o biopotencial das espécies deste gênero, bem como o avanço do desenvolvimento de fitomedicamentos utilizando estas plantas.(AU)
The use of the Brazilian biodiversity by the population remains a major source of discovery of new bioactive chemical entities. In this work a literature review is carried out relative to botany characteristics, ethnobotany, pharmacological activity, toxicological and chemical composition of Eugenia species: Eugenia brasiliensis Lam, Eugenia dysenterica DC, Eugenia umbelliflora O. Berg, Eugenia florida DC., Eugenia involucrate DC. and Eugenia uniflora L. This retrospective descriptive study aims to evaluate the biopotential of the species belonging to this gender as well as the advancement in the development of the phytomedicines using these plants.(AU)
