Sistema Regional de Información
en línea para Revistas Científicas de América Latina,
el Caribe, España y Portugal

Dominican agricultural products for export purposes are constantly tested for pesticide residues. These agro-foods present high concentrations of pesticides that exceed the established maximum residue levels (MRLs), becoming a food safety concern. The objective of this study was to identify the presence, types and concentrations of 70 pesticide residues commonly used in the horticultural sector in two cultivars of peppers using the gas chromatography technique coupled to mass spectrometry (GC-MS), in selected food markets from the San José de Ocoa province and Gran Santo Domingo. Between January 2018 and June 2019, 117 sweet pepper samples were collected and were analyzed using the QuEChERS multiple residue extraction, followed by GC-MS. It was found that only 62% complied with the MRLs, with chlorphenapir and cyhalothrin being the most frequently detected (27 and 19 samples, respectively). Also, the presence of 19 varieties of pesticides were identified, including two illegal organochlorines: dicofol and dichlorodiphenyltrichloroethane (DDT). The high levels and wide variety of pesticide residues detected in this project suggest the need to enact regulations on the proper use of pesticides.

We present the checklist of vascular plants of Universidad ISA Campu, in Santiago, Dominican Republic. The list includes information such as, the scientific name, botanical family, life form, conservation status and geographic range, as well as some of its main ethnobotanical uses. The Campus harbors a total of 312 species of vascular plants distributed in 81 families and 254 genera. The richest families are Fabaceae (29), Poaceae (19), Asteraceae and Malvaceae (15), Arecaceae (14), Euphorbiaceae (12), Asparagaceae (10), Araceae, Bignoniaceae and Myrtaceae (9). The most represented life forms were the arboreal 106 (34%) and the herbaceous 95 (30%) species, respectively. Of the 312 species, 6 are endemic, 124 native and 183 introduced, of which 14 are considered potentially invasive. Eight taxa are under some category of threat according to the criteria of the IUCN and the Red List of the Dominican Republic. These species are: Agave vivipara L., Dypsis decaryi (Jum.) Beentje & J.Dransf, Jacaranda mimosifolia D. Don., Swietenia macrophylla King, under the category of Vulnerable (VU), Coffea arabica L., Pinus occidentalis Sw. under the category of Endangered (EN) and Leuenbergeria quisqueyana (Alain) Lodé.

Phenolic compounds are secondary metabolites present in a variety of plant material whose concentration, in the case of coffee, is affected during the roasting process. The research aimed to determine the effect that the roasting temperature has on the contraction of total phenolic compounds and antioxidant activity of coffee. There were 300 grams of green coffee of which 150 grams suffered an average roasting process (195 0C approximately). Three colorimetric methods were used for the determination of total phenols, flavonoids. The antioxidant activity was evaluated by the method of the free radical 2,2-diphenyl-1-picrylhydrazil (DPPH) and ferric reducing power (FRAP). A higher concentration of total phenols and flavonoids was observed in green coffee with significant difference from roasting (p<0.263). In relation to anthocyanins the contraction was higher in roasted coffee (p<0.324). The antioxidant activity by DPPH method was 92.2 % (IC50=298.4 for green coffee extract and 79.3 % for roasted coffee. From the study it is concluded that temperature has an impact on the contraction of phenolic compounds present in coffee, influencing the antioxidant activity of one of the most consumed beverages worldwide.

No summary.

Professor Maria Helena Capelato contributed to the Dossier Culture and Democracy: convergences, conflicts and public interests, through an online interview prepared by professors Rosangela Patriota, Thaís Leão Vieira and Rodrigo de Freitas Costa. The dossier that has as one of the objectives to analyze the Brazilian political culture in recent years, leads us to a plurality of discussions involving different areas of academic knowledge.

This article aims to discuss the theme of democracy from the current political situation as a counterpoint to recent historical experiences, especially through Thomas Bernhard's Heroes' Square (Hendelplatz).

List of reviewers of albuquerque: journal of history, vol. 12, n. 24, Jul./Dec. 2020. 

Editorial board and issue informations of albuquerque: jounal of history, vol. 12, n. 23, Jul./Dec. 2020.

Editorial of albuquerque, vol. 12, n. 24, Jul.— Dec. 2020.