Browsing by Author "Palma, Patricia"

Now showing 1 - 7 of 7
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    Antibacterial Silver Nanoparticles Supported on Graphene Oxide with Reduced Cytotoxicity
    (2019) Angulo-Pineda, Carolina; Palma, Patricia; Bejarano, Julian; Riveros, Ana; Kogan, Marcelo; Palza, Humberto
    The effect of graphene oxide (GO) on both the antibacterial and cytotoxicity behavior of silver nanoparticles (Ag NPs) has been studied. Ag NPs supported on GO were synthesized by two methods, ex situ and in situ. These nanocomposites were characterized by transmission electron microscopy, ultraviolet-visible spectroscopy, Raman spectroscopy, and Fourier-transform infrared spectroscopy. The antibacterial activity of the nanomaterials was evaluated against Escherichia coli and Staphylococcus aureus by the disk-diffusion method and dynamic contact assays. While GO flakes showed antibacterial behavior only in the dynamic contact test, both GO-Ag NPs nanohybrids eradicated bacteria independent of the condition. Noteworthily, the high cytotoxicity of Ag NPs to human-derived cells was dramatically decreased by the GO layers in the nanocomposite. The in situ hybrid particles showed the lowest cytotoxicity without losing the strong antibacterial effect. These results demonstrate that growth of Ag NPs on GO layers could enable the development of a new family of antibacterial materials with low cytotoxicity to human cells.
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    ‘Lo chino’ en el teatro chileno de principios del siglo XX: El Chino de Ernesto Monge Wilhelms
    (2021) Montt Strabucchi, María; Palma, Patricia
    El artículo analiza la primera obra de teatro escrita y publicada en Chile protagonizada por un inmigrante chino: El Chino del autor peruano Ernesto Monge Wilhems (1878-1937), estrenada en 1925 y publicada en 1927 en la colección Lectura Selecta. Por medio de un análisis de la obra, proponemos que El Chino fue una obra rupturista para su época. Aunque no exenta de racismo y estereotipos, Ernesto Monge Wilhems construyó una imagen compleja del migrante chino que difería de la representación tradicional de las personas chinas de la primera mitad del siglo XX.
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    Covid-19, the Chinese diaspora, and the enduring legacy of racism in Peru
    (2022) Ragas Rojas, José Frank; Palma, Patricia
    The coronavirus pandemic has exposed a global tendency throughout history to blame immigrants for propagating epidemics. Chinese individuals were thus targeted during past public health crises in Peru, but during the current coronavirus pandemic racist notions painting people of Chinese descent as "agents of contagion" diminished significantly. Here we examine three major epidemics (yellow fever, the bubonic plague, and covid-19) to demonstrate the current and somewhat surprising shift in negative attitudes toward the Chinese community. Peruvians' refusal to embrace derogatory terms (the "Chinese virus") or target individuals of Asian descent constitutes an intriguing case at a moment when xenophobic discourse is rampant in the Western hemisphere.
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    Enclaves sanitarios : higiene, epidemias y salud en el Barrio chino de Lima, 1880-1910
    (2018) Palma, Patricia; Ragas Rojas, José Frank
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    Workers and the Local Response to the Third Plague Pandemic in Iquique (Chile, 1900-1903)
    (2023) Palma, Patricia; Ragas, Jose
    By studying the Third Plague Pandemic in Iquique, Chile, this article aims to contribute to the recent trends of scholarship that emphasize the global scope and impact of historical pandemics in local contexts. It examines how the local population and especially saltpeter workers understood, contested, and even neglected the epidemic due to local tensions. Methodologically, this paper relies on an ample array of sources, with an emphasis on sociocultural artifacts produced by local residents, such as poetry, newspapers of the working class, and cartoons. We conclude that in Chile the epidemic that affected Iquique in May 1903 revealed the government's inability to respond to epidemic outbreaks manifesting in areas far from Santiago, the capital city. In Iquique, the workers and lower classes responded massively, denying the epidemic. The popular sources reveal an anti-central government and anti-big capital sentiment that ultimately led Iquiquenos to perceive the plague as a hoax.