No abstract

A lo largo del siglo XIX la provincia argentina de Buenos Aires fue un espacio fronterizo en

El pensamiento sobre inmigración es un componente medular del proceso de construcción nacional argentino. Elemento inescindible de ese pensamiento ha sido la presencia de una voluntad de selectividad étnica, variando su formulación específica según el criterio de «nación» que fuera hegemónico en cada período histórico, desde sus orígenes, con las elaboraciones alberdianas, hasta la última política inmigratoria aplicada por el primer gobierno peronista.

Kinetoplastida is a group of flagellated protozoa characterized by the presence of a kinetoplast, a structure which is part of a large mitochondria and contains DNA. Parasites of this group include genera such as Leishmania, that cause disease in humans and animals, and Phytomonas, that are capable of infecting plants. Due to the lack of treatments, the low efficacy, or the high toxicity of the employed therapeutic agents there is a need to seek potential alternative treatments. In the present work, the antiparasitic activity on Leishmania infantum and Phytomonas davidi of 23 essential oils (EOs) from plants of the Lamiaceae and Asteraceae families, extracted by hydrodistillation (HD) at laboratory scale and steam distillation (SD) in a pilot plant, were evaluated. The chemical compositions of the EOs were determined by gas chromatography-mass spectrometry. Additionally, the cytotoxic activity on mammalian cells of the major components from the most active EOs was evaluated, and their anti-Phytomonas and anti-Leishmania effects analyzed. L. infantum was more sensitive to the EOs than P. davidi. The EOs with the best anti-kinetoplastid activity were S. montana, T. vulgaris, M. suaveolens, and L. luisieri. Steam distillation increased the linalyl acetate, β-caryophyllene, and trans-α-necrodyl acetate contents of the EOs, and decreased the amount of borneol and 1,8 cineol. The major active components of the EOs were tested, with thymol being the strongest anti-Phytomonas compound followed by carvacrol. Our study identified potential treatments against kinetoplastids.

In December 1938 an alliance of the Radical, Communist and Socialist parties took office in Chile, the first Popular Front to come to power in Latin America. A few months later, in Spain, the Nationalist forces under Generalísimo Franco occupied Madrid, bringing an end to the civil war. Shortly after, a serious diplomatic conflict developed between Spain and Chile, in which most of Latin America gradually became embroiled. It concerned the fate of 17 Spanish republicans who had sought asylum in the Chilean embassy in the last days of the seige of Madrid, and culminated in July 1940 when the Nationalist government broke off relations with Chile. Initially, the issue at the heart of the episode was the right to political asylum and the established practice of Latin American diplomatic legations of offering protection to individuals seeking asylum (asilados). The causes of the conflict, however, became increasingly obscured as time went on. The principles at stake became confused by mutual Spanish– Chilean distrust, the Nationalists' ideological crusade both within Spain and outside and the Chilean government's deep hostility to the Franco regime, which it saw as a manifestation of fascism. The ideological gulf widened with the onset of the Second World War. This article concentrates primarily, although not exclusively, on the first part of the dispute, April 1939–January 1940. In this period asylum, which is our main interest, was uppermost in Spanish–Chilean diplomatic correspondence.