1
artículo
Publicado 2017
Enlace

En Perú es muy importante aumentar la calidad de los alimentos y la producción en las zonas rurales donde se encuentran altos problemas de pobreza y malnutrición. La inducción de la mutación se utiliza para mejorar los cultivares bien adaptados, mediante la mejora de una o dos características, y conservando todos sus otros atributos. Las líneas mutantesde Hordeum vulgare se desarrollaron a partir del cultivar UNALM 96, después de la irradiación a 200 y 300 Gray. Las líneas mutantes se seleccionaron en la generación M8 con mayor rendimiento agronómico y calidad nutritiva. Se adaptaron a las tierras altas con un rendimiento de grano dentro del rango de 5, 100 y 8,731 kg/ha sobre el valor del material parental (4,246 kg/ha) y mostraron mejores contenidos de P (131 mg/g de peso seco-DW), Zn (66 mg/g DW), Mn (55 mg/g DW), Fe (57 mg/g DW) y Cu (63 μg/g DW).
2
artículo
Publicado 2010
Enlace

Zinc stannate (ZTO) was synthesised hydrothermally at 200 ºC for 16 h. The obtained material was characterized using X-ray diffraction (XRD) and transmission electron microscope (TEM). The main cristallite size was 40 nm calculated from its X-ray diffractogram. The photocatalytic activity of this material was tested by measuring the decomposition of an aqueous solution of methyl orange under UV light illumination. The result shows a degradation of 30% of the dye after 60 min of treatment.
3
artículo
Publicado 2010
Enlace

Se sintetizó el estanato de cinc, Zn2SnO4 (ZTO) por el método hidrotérmico empleando una temperatura de 200 ºC durante 16 h. El material obtenido fue caracterizado por difracción de rayos X (DRX) y microscopia electrónica de transmisión (MET). El tamaño de cristalito calculado a partir de su difractograma fue de 40 nm. La actividad fotocatalítica del ZTO fue evaluada estudiando la degradación del colorante anaranjado de metilo en solución acuosa bajo iluminación luz ultravioleta. Los resultados muestran una degradación de aproximadamente 30% luego de 60 min de tratamiento.
4
artículo
Publicado 2010
Enlace

Nanoparticles of zinc peroxide were synthesized by sol-gel technique using as precursors aqueous solutions of zinc acetate di-hydrate (Zn(CH3COO)2.2H2O) and hydrogen peroxide (H2O2) at 30%. During the synthesis the sol was exposed to an specific radiation (gamma or ultraviolet). The structure of the ZnO2 nanoparticles was characterized by X-ray diffraction. The sol absorbance vs. the time of irradiation was studied for UV irradiated sols. Thin films of ZnO2-ZnO were made using spray pyrolysis of the irradiated sols. The morphology of these films was studied by atomic force microscopy.
5
artículo
Publicado 2010
Enlace

Nanopartículas de peróxido de zinc (ZnO2) fueron sintetizadas mediante la técnica de sol-gel, empleando acetato de zinc di-hidratado (Zn(CH3COO)2.2H2O) y peróxido de hidrógeno (H2O2) al 30% en un medio acuoso. Durante la síntesis, el sol fue expuesto a una determinada radiación (gamma o ultravioleta). Las nanopartículas de ZnO2 obtenidas fueron caracterizadas estructuralmente mediante la técnica de difracción de rayos-X. Se estudió la dependencia de la absorbancia del sol con relación al tiempo de irradiación ultravioleta. Empleando la técnica de rociado pirolítico se depositaron películas delgadas de ZnO2-ZnO utilizando el sol irradiado. La morfología de las películas fue estudiada mediante microscopía de fuerza atómica.
6
artículo
Publicado 2020
Enlace

The study was carried out in the central Andes of Peru aiming to evaluate promising genotypes of dual-purpose barley (greater grain and straw yield), cultivated during the dry season. Twenty-five genotypes, of which 22 were barley mutants generated by induction from the commercial variety UNA La Molina 96 were tested. A completely randomized block design with 25 barley genotypes and 3 replications per genotype was used. The yield in grain (kg/ha) and straw (kg DM/ha) was evaluated, as well as the protein content, neutral detergent fibre and in vitro digestibility of organic matter for the straw. The genotypes that showed the best characteristics for a dual-purpose barley were UNALM 96 M6h-617, followed by UNA 80 line 525 and UNALM 96 M6h-326. No significant relationship was found between grain and straw production.
7
artículo
Publicado 2020
Enlace

The study was carried out in the central Andes of Peru aiming to evaluate promising genotypes of dual-purpose barley (greater grain and straw yield), cultivated during the dry season. Twenty-five genotypes, of which 22 were barley mutants generated by induction from the commercial variety UNA La Molina 96 were tested. A completely randomized block design with 25 barley genotypes and 3 replications per genotype was used. The yield in grain (kg/ha) and straw (kg DM/ha) was evaluated, as well as the protein content, neutral detergent fibre and in vitro digestibility of organic matter for the straw. The genotypes that showed the best characteristics for a dual-purpose barley were UNALM 96 M6h-617, followed by UNA 80 line 525 and UNALM 96 M6h-326. No significant relationship was found between grain and straw production.
8
artículo
The effects of gamma radiation on the germination, survival, and morphological damage in characteristics of the M1 generation of coffee (Coffea arabica L. var. typica) plants was evaluated using seeds collected from Santa Teresa and Chaupimayo, Peru. Under net house, the percentage of germination was 68%, 35%, 10%, and 0% for the Santa Teresa seeds and 75%, 49%, 17% and 0% for the Chaupimayo seeds with irradiation treatments of 0, 50, 100 and 150 Gy, respectively, whereas under laboratory conditions, germination levels were between 70% and 94% across all treatments. The survival rate also decreased with increasing radiation levels, with values of 45%, 32%, 28%, and 10% in the laboratory and 29%, 9%, 6%, and 0% in the net house for the Santa Teresa seeds and 58%, 45%, 38%, and 8% in the laboratory and 42%, 15%, 7%, and 0% in the net house for the Chaupimayo seeds with irradiation treatmen...
9
artículo
Publicado 2013
Enlace

Desde el inicio de la epidemia de cólera en el Perú el Programa de Entrenamiento en Epidemiología de Campo de la Oficina General de Epidemiología del Ministerio de Salud ha desarrollado diversas investigaciones con el propósito de mejorar de las medidas de intervención para el control del problema. A través de la aplicación y diseños metodológicos estandarizados en las áreas mas afectadas, se ha encontrado que la seroprevalencia de infección por Vibrio cholerae alcanza a 25-30 de cada 100 habitantes. Los factores de riesgo más significativos incluyen consumo de agua no tratada y de alimentos sanitariamente deficientes. La severidad de cuadro clínico colérico está asociada significativamente con la presencia de grupo sanguíneo "O". La letalidad del cólera está asociada con el tratamiento intradomiciliario del enfermo y laautomedicación familiar. El desconocimiento acer...
10
artículo
Publicado 2018
Enlace

This work was partially supported by the Fogarty International Center/NIH (training grant numbers D43TW001140 and D43TW007393) and by the National Council for Science, Technology and Innovation of Peru (CONCYTEC).
11
artículo
Publicado 2017
Enlace

Se estudió los casos de 298 pacientes con anemia aplásica severa aloinjertados, en cuatro países de América Latina: Argentina, México, Perú y Colombia. Se proporciona datos reales del impacto de la administración de fuente de células madre y de globulina antitimocito en el trasplante de hermanos con idéntico Antígeno leucocitario humano.
12
artículo
Publicado 2020
Enlace

The use of L protein coupled magnetic particles for the concentration and purification of immunoglobulin M (mIgM) monoclonal antibodies against Taenia solium was evaluated. Three concentration methods and different elution times were evaluated and the ratio of particles to the ratio of mIgM was optimized. It is demonstrated that: 1) with the use of magnetic particles, a previous concentration of mIgM is not required, which reduces the manipulation of the antibodies and improves the recovery, 2) the use of a binding buffer can be omitted, since the pH of most cell culture supernatants are neutral, and 3) longer elution times (~ 45 minutes) are needed to increase recovery to a level greater than 80%. The study demonstrates that the use of L protein-coupled magnetic particles is a simple and efficient tool for mIgM concentration and purification. © 2020, Instituto Nacional de Salud. All ri...
13
artículo
Publicado 2020
Enlace

Background Describing the prevalence and trends of cardiometabolic risk factors that are associated with noncommunicable diseases (NCDs) is crucial for monitoring progress, planning prevention, and providing evidence to support policy efforts. We aimed to analyse the transition in body-mass index (BMI), obesity, blood pressure, raised blood pressure, and diabetes in the Americas, between 1980 and 2014. Methods We did a pooled analysis of population-based studies with data on anthropometric measurements, biomarkers for diabetes, and blood pressure from adults aged 18 years or older. A Bayesian model was used to estimate trends in BMI, raised blood pressure (systolic blood pressure =140 mm Hg or diastolic blood pressure =90 mm Hg), and diabetes (fasting plasma glucose =7.0 mmol/L, history of diabetes, or diabetes treatment) from 1980 to 2014, in 37 countries and six subregions of the Ameri...