This work was financed by MINCyT (Argentina) and CONCyTEC (Perú).

The study was to evaluate the essential oil of Erythroxylum coca Lam. var. coca (Coca) - from Quillabamba province, Cusco region and determine its antibacterial activity, and elucidate the same chemical composition by Gas Chromatography / Mass Spectrometry (GC / MS). The plant part used the dried leaves were provided by the National Coca Company ENACO SA, which dealt with a system by steam distillation of water. The essential oil yield was 0.08% v/p and on that physicochemical tests were performed: Miscibility, density and refractive index. In the chemical composition found the following components: Guai-1(5),(11)-diene, t-cadinene, (2E,7R,11R)-3,7,11,15-tetramethyl-2-hexadecan-1 -ol, eudesm-4(14)-en-11-ol, hexahydrofarnesil ketone, hexadecanoic acid, phytol, cis-9-octadecenoic and octadecanoic acid. The study of antibacterial activity in vitro, using the method of excavation culture pla...

The study was to evaluate the essential oil of Erythroxylum coca Lam. var. coca (Coca) - from Quillabamba province, Cusco region and determine its antibacterial activity, and elucidate the same chemical composition by Gas Chromatography / Mass Spectrometry (GC / MS). The plant part used the dried leaves were provided by the National Coca Company ENACO SA, which dealt with a system by steam distillation of water. The essential oil yield was 0.08% v/p and on that physicochemical tests were performed: Miscibility, density and refractive index. In the chemical composition found the following components: Guai-1(5),(11)-diene, t-cadinene, (2E,7R,11R)-3,7,11,15-tetramethyl-2-hexadecan-1 -ol, eudesm-4(14)-en-11-ol, hexahydrofarnesil ketone, hexadecanoic acid, phytol, cis-9-octadecenoic and octadecanoic acid. The study of antibacterial activity in vitro, using the method of excavation culture pla...

Con el objetivo de encontrar diferencias, que nos puedan inducir a error, en las emisiones de metano en alpacas. Se utilizaron 8 alpacas macho, de dos años de edad; los cuales fueron distribuidos al azar en Grupo A (alimento fibroso ofrecido en forma entera, n=4) y el Grupo B (alimento fibroso ofrecido en forma molida n=4). Se evaluaron las emisiones de CH4 en la mañana y en la noche; utilizando un equipo portátil de medición de gases Gasmet DX-4030 Analyser. Para el análisis de los resultados se utilizó una regresión lineal mixta. No se encontraron diferencias estadísticas significativas (p<0.05) en el efecto de las dietas fibrosas sobre la producción de CH4 ni en el momento de evaluación (mañana o noche).

Rapid Diagnostic Tests (RDTs) for malaria are restricted to a few biomarkers and antibody-mediated detection. However, the expression of commonly used biomarkers varies geographically and the sensibility of immunodetection can be affected by batch-to-batch differences or limited thermal stability. In this study we aimed to overcome these limitations by identifying a potential biomarker and by developing molecular sensors based on aptamer technology. Using gene expression databases, ribosome profiling analysis, and structural modeling, we find that the High Mobility Group Box 1 protein (HMGB1) of Plasmodium falciparum is highly expressed, structurally stable, and present along all blood-stages of P. falciparum infection. To develop biosensors, we used in vitro evolution techniques to produce DNA aptamers for the recombinantly expressed HMG-box, the conserved domain of HMGB1. An evolutiona...

YBa2Cu3(O)7-x thin film sample was studied by micro-Raman spectroscopy. The investigation involved aspects like crystal orientation, uniformity, secondary phases, impurities, oxygen content and defects, based on the speciftc Raman selection rules for YBa2Cu3(O)7-x and polarized Raman scattering experiments.

YBa2Cu3(O)7-x thin film sample was studied by micro-Raman spectroscopy. The investigation involved aspects like crystal orientation, uniformity, secondary phases, impurities, oxygen content and defects, based on the speciftc Raman selection rules for YBa2Cu3(O)7-x and polarized Raman scattering experiments.

The original concept of El Niño consisted of anomalously high sea surface temperature and heavy rainfall along the arid northern coast of Peru (Carranza 1891; Carrillo 1893). The concept evolved into the El Niño–Southern Oscillation (ENSO; Bjerknes 1969), although the original El Niño and the Southern Oscillation do not necessarily have the same variability (Deser and Wallace 1987), and the strong El Niño episode in early 1925 coincided with cold-to-neutral ENSO conditions (Takahashi and Martínez 2017). To distinguish the near-coastal El Niño from the warm ENSO phase, Peru operationally defines the “coastal El Niño” based on the seasonal Niño 1+2 SST anomaly (ENFEN 2012; L’Heureux et al. 2017). While recent attention has been brought to the concept of ENSO diversity (e.g., “central Pacific” vs “eastern Pacific” events; Capotondi et al. 2015), the coastal El Niño ...