Daniel MéndezUniversidad de Camagüey "Ignacio Agramonte Loynaz" · Departamento de Química
Daniel Méndez
M. Sc.
About
13
Publications
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Introduction
I work on the phytochemistry field. I'm currently working in the chemical composition and biological activities of cuban plants.
Publications
Publications (13)
The increase in antibiotic resistance demands innovative strategies to combat microorganisms. The current study evaluated the antibacterial and antivirulence effects of ethanol extracts from Persea americana seeds obtained by the Soxhlet (SE) and maceration (MaE) methods. The UHPLC-DAD-QTOF analysis showed mainly the presence of polyphenols and neo...
This study aimed to analyse the world scientific production on antifungals from plants indexed in the Scopus database (2000-2020), highlighting the Cuban scientific production on this topic as a case study. Scopus raw data based on "antifungal" and "plants" hits were cleaned using the OpenRefine tool to eliminate similar and duplicate results. Clea...
Plectranthus neochilus Schltr. (Lamiaceae) is a plant recently introduced in Cuba. Worldwide , it is an ethnomedicinal alternative for its use against microbial infections, but the Cuban population use the extracts to treat sleep disorders. To address this apparent incongruity, four collections (from different seasonal conditions in the year) of Cu...
Coccoloba cowellii Britton (Polygonaceae, order Caryophyllales) is an endemic and critically endangered plant species that only grows in the municipality of Camagüey, a province of Cuba. A preliminary investigation of its total methanolic extract led to the discovery of promising antifungal activity. In this study, a bioassay-guided fractionation a...
Coccoloba cowellii Britton (Polygonaceae) is an endemic and critically endangered plant that only grows in Camagüey, a province of Cuba. In this study, a total of 13 compounds were identified in a methanolic leaf extract, employing a dereplication of the UHPLC-HRMS data by means of feature-based molecular networking (FBMN) analysis in the Global Na...
![Assigned compounds, [M−H] − and ESI negative fragment ions of the...](profile/Daniel-Mendez-16/publication/348553917/figure/tbl1/AS:990375493783559@1613135326690/Assigned-compounds-M-H-and-ESI-negative-fragment-ions-of-the-thirteen-flavonoids_Q320.jpg)
Objective
To investigate the main chemical components and the anti-inflammatory activity of extracts of Adelia ricinella L. aerial parts.
Methods
Three extracts obtained by soxhlet extraction and ethanol/water mixtures were evaluated in their chemical composition by UPLC-DAD-MS/MS. The in vitro anti-inflammatory activity of the prepared extracts w...
The genus Coccoloba (Polygonaceae) comprises approximately 150 species of flowering plants. It is native to the tropical and subtropical regions of America, in South America, the Caribbean and Central America. A wide variety of biological activities has been studied for Coccoloba species due to great diversity of metabolites (mainly flavonoids, tan...
Plants are phytochemical hubs containing antioxidants, essential for normal plant functioning and adaptation to environmental cues and delivering beneficial properties for human health. Therefore, knowledge on the antioxidant potential of different plant species and their nutraceutical and pharmaceutical properties is of utmost importance. Explorin...
The qualitative and quantitative chemical composition (total phenolics, tannins and flavonoids contents), as well as the antioxidant activity of an ethanolic extract of the leaves of Coccoloba cowellii (Polygonaceae) was determined in this study. The extract was prepared by dynamic ultrasound-assisted extraction using firstly petroleum ether:ethyl...
Questions
Questions (2)
I am trying to use MS-DIAL to process some data from an UPLC-ESI-QTOF spectrometer, but I dont know which is the best QC sample. Somebody can give me some ideas?
I am working with Waters Xevo GS-2 Q-TOF mass spectrometer in MSe mode to analyze and identify phenolic compounds (mainly flavonoids) in a water/metanol extract. But, when i open my .raw files, every peak is represented as MS1. Where my MS2 peaks go? It is a way to fix this issue??
Projects
Projects (3)
The Center for Environmental Management Studies of the University of Camagüey “Ignacio Agramonte Loynaz”, convenes to the XVI Botanical Meeting “Johannes Bisse in Memoriam”, to be held online between November 15 and 18, 2021.
Goals.
1-Promote the exchange of experiences between botanists and experts in related sciences.
2-Promote cooperation between institutions and researchers.
3-Pay tribute to the relevant German scientist Prof. Dr. Johannes Bisse, on the 37th anniversary of his physical disappearance.
Isolate the main secondary metabolites from Coccoloba cowellii leave extracts and test the biological activity of this extracts using different assays.
