[Cochineals in the Portuguese-Brazilian world: the eighteenth-century manuscript edited by Manuel Joaquim Henriques de Paiva]. / A cochonilha no mundo luso-brasileiro: o manuscrito setecentista editado por Manuel Joaquim Henriques de Paiva.

A previously unpublished, modernized transcript of the manuscript História do descobrimento da cochonilha no Brasil (History of the discovery of the cochineal in Brazil), edited by the physician and chemist Manuel Joaquim Henriques de Paiva between 1774 and 1801, is presented. By bringing out this reviewed, annotated version of the pioneering study by his brother, the physician José Henriques Ferreira, Paiva wanted to encourage the culture and trade of the cochineal, an insect that produced a red dye that was in great demand in Europe. História... thus provides indications of the key role of so-called scientific knowledge in the development and growth of the Portuguese kingdom and their primary colony.

O documento que o leitor encontrará a seguir é a transcrição inédita e modernizada do manuscrito História do descobrimento da cochonilha no Brasil, editado pelo médico e químico Manuel Joaquim Henriques de Paiva entre os anos de 1774 e 1801. O propósito de Paiva, com essa versão revista e anotada do estudo pioneiro de seu irmão, o médico José Henriques Ferreira, era estimular a cultura e o comércio da cochonilha, um inseto produtor de corante avermelhado muito requisitado na Europa. A História..., portanto, fornece indícios do papel capital dos saberes ditos científicos para o fomento e engrandecimento do Reino português e de sua principal colônia.

A cochonilha no mundo luso-brasileiro: o manuscrito setecentista editado por Manuel Joaquim Henriques de Paiva / Cochineals in the Portuguese-Brazilian world: the eighteenth-century manuscript edited by Manuel Joaquim Henriques de Paiva

Resumo O documento que o leitor encontrará a seguir é a transcrição inédita e modernizada do manuscrito História do descobrimento da cochonilha no Brasil, editado pelo médico e químico Manuel Joaquim Henriques de Paiva entre os anos de 1774 e 1801. O propósito de Paiva, com essa versão revista e anotada do estudo pioneiro de seu irmão, o médico José Henriques Ferreira, era estimular a cultura e o comércio da cochonilha, um inseto produtor de corante avermelhado muito requisitado na Europa. A História..., portanto, fornece indícios do papel capital dos saberes ditos científicos para o fomento e engrandecimento do Reino português e de sua principal colônia.

Abstract A previously unpublished, modernized transcript of the manuscript História do descobrimento da cochonilha no Brasil (History of the discovery of the cochineal in Brazil), edited by the physician and chemist Manuel Joaquim Henriques de Paiva between 1774 and 1801, is presented. By bringing out this reviewed, annotated version of the pioneering study by his brother, the physician José Henriques Ferreira, Paiva wanted to encourage the culture and trade of the cochineal, an insect that produced a red dye that was in great demand in Europe. História... thus provides indications of the key role of so-called scientific knowledge in the development and growth of the Portuguese kingdom and their primary colony.

Analysis of natural red dyes (cochineal) in textiles of historical importance using HPLC and multivariate data analysis.

A new analytical approach based on high-performance liquid chromatography with diode array detector (HPLC-DAD) and multivariate data analysis was applied and assessed for analyzing the red dye extracted from cochineal insects, used in precious historical textiles. The most widely used method of analysis involves quantification of specific minor compounds (markers), using HPLC-DAD. However, variation in the cochineal markers concentration, use of aggressive dye extraction methods and poor resolution of HPLC chromatograms can compromise the identification of the precise insect species used in the textiles. In this study, a soft extraction method combined with a new dye recovery treatment was developed, capable of yielding HPLC chromatograms with good resolution, for the first time, for historical cochineal-dyed textiles. After principal components analysis (PCA) and mass spectrometry (MS), it was possible to identify the cochineal species used in these textiles, in contrast to the accepted method of analysis. In order to compare both methodologies, 7 cochineal species and 63 historical cochineal insect specimens were analyzed using the two approaches, and then compared with the results for 15 historical textiles in order to assess their applicability to real complex samples. The methodology developed here was shown to provide more accurate and consistent information than the traditional method. Almost all of the historical textiles were dyed with Porphyrophora sp. insects. These results emphasize the importance of adopting the proposed methodology for future research on cochineal (and related red dyes). Mild extraction methods and HPLC-DAD/MS(n) analysis yield distinctive profiles, which, in combination with a PCA reference database, are a powerful tool for identifying red insect dyes.