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Ação Social Escolar e democratização do ensino
Alves, Arminda de Lurdes Pires LeiteUm olhar reflexivo sobre o nosso percurso de vida põe em evidência um percurso de professora em que se entranham funções de gestão, de entre as quais sobressaem tarefas no âmbito da ação social escolar. A ação social escolar é um dispositivo importante na democratização do ensino, mas, por si só, não garante a democraticidade do serviço público de educação. Esta temática é ainda mais pertinente num período de g...
Fast screening procedure for antibiotics in wastewaters by direct HPLC-DAD anal...
Teixeira, Salomé; Delerue-Matos, Cristina; Alves, Arminda; Santos, LúciaGrowing concern about the contamination of wastewaters by antibiotics demands fast but sensitive analytical methodologies, for the screening of a large number of samples. The purpose of this work was to develop a simple methodology, using direct injection of the samples, by HPLC with diode array detection (DAD), for a multiresidue analysis of five antibiotics of different classes. Wastewater from an urban water...
Changes in Ochratoxin A concentration during winemaking
Fernandes, Anabela; Ratola, Nuno; Cerdeira, António; Alves, Arminda; Venâncio, ArmandoThe effects of common winemaking procedures on ochratoxin A (OTA) concentrations in the Portuguese wine Vinho Verde were studied. Natural contamination of grapes was not observed, so grapes for vinification were inoculated with Aspergillus carbonarius. Ochratoxin A concentration in these grapes ranged from 0.43 to 7.48 μg/kg. Vinification consistently reduced OTA concentrations in wine independent of the initia...
Relationship Between Biogenic Amines and Free Amino Acid Contents of Winesand M...
Herbert, Paulo; Cabrita, Maria Joao; Ratola, Nuno; Laureano, Olga; Alves, ArmindaThe concentration of biogenic amines and free amino acids was studied in 102 Portuguese wines and 18 musts from Alentejo demarcated (D.O.C.) regions. Most wines were commercial, except for 38 monovarietals obtained by micro vinification. Musts from the varieties used to produce the latter wines were also studied. Both biogenic amines and free amino acids were analyzed by HPLC using fluorescence detection for th...
Development and validation of a novel method for the analysis of chlorinated pe...
Herbert, Paulo; Morais, Simone; Paíga, Paula; Alves, Arminda; Santos, LúciaA new procedure for determining eleven organochlorine pesticides in soils using microwave-assisted extraction (MAE) and headspace solid phase microextraction (HS-SPME) is described. The studied pesticides consisted of mirex, α- and γ-chlordane, p,p’-DDT, heptachlor, heptachlor epoxide isomer A, γ-hexachlorocyclohexane, dieldrin, endrin, aldrine and hexachlorobenzene. The HS-SPME was optimized for the most impor...
Worldwide interlaboratory study on the determination of ochratoxin A in differe...
Ratola, N.; Barros, P.; Simões, T.; Cerdeira, António; Venâncio, Armando; Alves, ArmindaInterlaboratory studies are decisive tools to help the validation of a specific analytical methodology or to assess the reproducibility of the use of different methods to analyze a given compound or compounds in certain sample matrices. In this work, homogeneous samples of two white wines (“White Wine” and “White Liqueur Wine”) and one red wine (“Red Fortified Wine”) from Portugal with different production tech...
Evolution of ochratoxin A content from must to wine in Port wine microvinification
Ratola, N.; Abade, E.; Simões, T.; Venâncio, Armando; Alves, ArmindaTo study the evolution of ochratoxin A (OTA) content from must to wine during the making of Port Wine, grapes from the five most common varieties of Port Wine were harvested and combined in equal percentages in order to perform microvinifications. Three sets of assays were studied: a blank (A), where the most common Port Wine-making process was used; in the second (B), a solution of OTA was added to the initial...
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