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1
artículo
Publicado 2025
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Tree diversity plays a key role in mitigating climate change and enhancing ecosystem resilience. This study evaluated the contribution of trees across three habitats within the urban–rural gradient of Sucre, Bolivia: urban (UF), native (NF), and exotic (EF). Carbon sequestration, as well as taxonomic (TD), phylogenetic (PD), and functional (FD) diversity, were analyzed in relation to bioclimatic (temperature and precipitation) and geographic (altitude) factors. The methodology included the recording of botanical and ecological traits, along with the measurement of dendrometric classes (DBH ≥ 10 cm) in 12 temporary circular plots per habitat. Results showed higher carbon stocks in the urban forest (268.36 ± 2.76 MgC/ha), followed by the exotic (159.53 ± 0.86 MgC/ha) and the native forest (39.64 ± 0.41 MgC/ha). A total of 31 species from 19 families were identified, with marked evol...
2
artículo
Freshwater algae are considered a very important resource within the food industry due to their high nutritional content and bioactive compounds. This review article aims to address microalgae and macroalgae as alternative/complementary protein sources and explore their potential applications in food products. The main types of freshwater microalgae (including cyanobacteria such as Arthrosporic and green algae such as Chlorella, Scenedesmus, and Haematococcus) are described, their morphology, ecological relevance, and applications (food, nutraceutical, and industrial). Likewise, the extraction and application methods of their components (conventional, ultrasonic, Soxhlet, microwave, CO2 (SFE) are detailed, comparing principles, operating parameters, yields, and benefits for the industry. The proximate and micronutrient composition of each algae (proteins, carbohydrates, lipids, ash, mois...
3
artículo
Publicado 2021
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The Rietveld refinement method has taken high relevance since its creation. Nowadays, it is an useful tool in many fields of industry, materials science, and technology. For these reasons, it becomes a need for scientists and engineers whom pretend to use it for proper analysis of their materials. However, the initiation in the method can be slow, taking into account the accelerated rhythm of the research and economic demands. Thus, this work is an intend to fulfill this hole, providing the basic foundations and methodology of the Rietveld refinement in a brief way, this along with the results of its application in superconducting samples of Yttrium Barium Copper Oxide and magnesium diboride, and functional magnetic nanoadsorbents of maghemite and a multiphasic composite (iron oxide, hydroxyapatite and secondary phases). In the process, an in-detail protocol was designed and provided. It...
4
artículo
Publicado 2020
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Key message Soil pH, EC, and salinity explain the leaf nutrient concentrations ofProsopis pallidadespite the high amount of soil nutrients near the trees. Dryland forests constantly face extreme abiotic conditions, and this affects plant growth and nutrition. We have determined the effects of soil chemical attributes and soil nutrients on the leaf nutrient concentrations of eightProsopis pallidapopulations located along a climatic gradient in the North-Peruvian dryland forests. We analyzed the leaf chemical composition (N, P, K, Ca, Mg, Fe, Mn, Cu, and Zn), as well as soil chemical attributes [texture, pH, salinity (electrical conductivity; EC), and the sodium adsorption ratio (SAR)] and soil nutrient concentrations (the same elements as in the leaves) at 2 m from the base of each tree. The soil and leaf nutrient concentrations were not associated with the climatic gradient and were high...
5
artículo
Publicado 2021
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Key message: Soil pH, EC, and salinity explain the leaf nutrient concentrations of Prosopis pallida despite the high amount of soil nutrients near the trees. Abstract: Dryland forests constantly face extreme abiotic conditions, and this affects plant growth and nutrition. We have determined the effects of soil chemical attributes and soil nutrients on the leaf nutrient concentrations of eight Prosopis pallida populations located along a climatic gradient in the North-Peruvian dryland forests. We analyzed the leaf chemical composition (N, P, K, Ca, Mg, Fe, Mn, Cu, and Zn), as well as soil chemical attributes [texture, pH, salinity (electrical conductivity; EC), and the sodium adsorption ratio (SAR)] and soil nutrient concentrations (the same elements as in the leaves) at 2 m from the base of each tree. The soil and leaf nutrient concentrations were not associated with the climatic gradien...
6
artículo
Comprehensive changes in Russian education are aimed at meeting the requirements of the modern economy and society. At the same time, the main vector in this area is the coordination of the content and component composition of professional training with the demands of the labor market and with the urgent need to increase the availability of high-quality educational services. Public experience demonstrates that objective reality makes significant adjustments to the professional training and education. Therefore, teachers should acknowledge and reflect in their professional activities all the new requirements presented by society in a timely manner. In the context of professional education, intensive search is carried out for adequate forms and methods to improve the effectiveness of education. In this regard, the practical value of simulation methods and technologies, aimed at revealing t...
7
artículo
Comprehensive changes in Russian education are aimed at meeting the requirements of the modern economy and society. At the same time, the main vector in this area is the coordination of the content and component composition of professional training with the demands of the labor market and with the urgent need to increase the availability of high-quality educational services. Public experience demonstrates that objective reality makes significant adjustments to the professional training and education. Therefore, teachers should acknowledge and reflect in their professional activities all the new requirements presented by society in a timely manner. In the context of professional education, intensive search is carried out for adequate forms and methods to improve the effectiveness of education. In this regard, the practical value of simulation methods and technologies, aimed at revealing t...
8
artículo
Publicado 2008
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The growth of the Peruvian migration to Buenos Aires is a phenomenon highlighted in the last decades. From a gender perspective, the configuration of the nets is studied in the pre-migration stage, as well as its later composition and distribution in Argentina. Secondary sources are used, but the main contribution comes given by the «Peruvian Migration and Gender Survey» (EMIGE 2007). Main results: it is the migratory flow with smaller antiquity in Argentina. In a high proportion, they concentrate on the City of Buenos Aires and they constitute the foreign population with bigger pre-eminence of women and the less aged one. With regard to premigration stage, the study shows that the migration networks are conditioned by the gender system, but that relationship varies along the process that goes from the decision taking to the concretion of the movement, in function of the vital/familiar...
9
artículo
Publicado 2008
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The growth of the Peruvian migration to Buenos Aires is a phenomenon highlighted in the last decades. From a gender perspective, the configuration of the nets is studied in the pre-migration stage, as well as its later composition and distribution in Argentina. Secondary sources are used, but the main contribution comes given by the «Peruvian Migration and Gender Survey» (EMIGE 2007). Main results: it is the migratory flow with smaller antiquity in Argentina. In a high proportion, they concentrate on the City of Buenos Aires and they constitute the foreign population with bigger pre-eminence of women and the less aged one. With regard to premigration stage, the study shows that the migration networks are conditioned by the gender system, but that relationship varies along the process that goes from the decision taking to the concretion of the movement, in function of the vital/familiar...
10
tesis de grado
Publicado 2008
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This research project entitled "Use of Lepidoptera as biomarkers for the diagnosis of ecosystem Microcuenca Shilcayo" was run along the watershed; whose objective was to collect and evaluate three lepidopteran sample units to be used as biomarkers for the respective diagnosis while mapping spatial distribution function of ecosystem types studied. Evaluations were carried out from July 2007 to January of this year; due to inclement weather occurred. The results indicate that the overall composition of the community of Lepidoptera is 1017 individuals belonging to 42 species and community composition assessed lepidopteran between stations is 282 individuals belonging to 21 species in Wingos station in the station Pukalluichu 331 individuals belonging to 28 species were recorded in the third season and called Takiwasi 404 individuals belonging to 32 species were quantified. It was concluded ...
11
artículo
Publicado 2025
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We evaluate the performance of an Omnivision OV5647 CMOS image sensor (5 Mp) for detecting radiation from Sr90 and Cs137 sources. Our experimental setup uses a Raspberry Pi 3 mini-computer for data acquisition, with image processing using Python and OpenCV libraries. We specify the necessary settings to convert a standard camera into a particle detector sensitive to electrons and photons, including a two-step background filtering procedure. In addition, we implement the first detailed Geant4 simulation that describes the layered geometry and material composition of a commercial CMOS sensor along with the radioactive sources. To enhance the simulation, we include an algorithm for charge diffusion and conversion of the energy deposited by electrons and photons into ADC counts. Our measurements are presented in terms of cluster size, the maximum ADC signal per cluster, and the number of clu...
12
artículo
Publicado 2018
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The experiments were carried with two steels with different chemical compositions, aiming at understanding and comparison with the available literature. The microstructures of steels 1045 and 4340 were characterized and quantified using scanning electron microscopy (SEM) and optic microscopy (OM) with quantitative methods. Based on the experimental results, the amount of martensite, the hardness and the microhardness were determined, as a function of the distance from the quenching end, under different cooling conditions. For predicting the evolution of martensitic fraction along the sample, Koistinen-Marburger’s (K-M) model was adopted. It was found that the parameters recommended in the literature for the traditional K-M model do not represent accurately the results obtained for the steel samples under investigation. According to indications found in recent literature, paramete...
13
tesis de grado
Publicado 2022
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The aguajales represent one of the ecosystems with the highest environmental and socioeconomic value in the Loreto region, where the predominant species is Mauritia flexuosa L.f. "aguaje". The growing demand for aguaje fruits in Amazonian cities has been generating an impact on the aguajales because of the destructive methods to harvest the fruit. The objective of the research was to determine the impact of the cutting of female palms in the floristic composition, diversity and functional traits of natural regeneration in aguajales. Five permanent plots of 0.5 ha were evaluated in aguajales in different stages of degradation, four plots in the Ucayali basin and one plot in the Yanayacu Pucate basin. The results show that the floristic composition, diversity and functional traits are changing along a gradient of degradation. In the floristic composition, the abundance of natural regenerat...
14
tesis de grado
Publicado 2009
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Thís research aíms to characterize the sedíments and suspended solíds leavíng the desanding to optimize the design of the sediments in the Special Project CHAVIMOCHIC Suspended solids without causing a number of drawbacks in the pressurized irrigation system, resulting in a reduction in the lifetime of the equipment and other elements of the system, resulting in negative effects on the cost of operation and production systems and crops. The settlers are a simple and economical solution for the removal of suspended /solids (sand, silt and el ay). May be designed to be the characteristics of the sediments such as size, shape, weight, speed and mineralogical composition offall. Sediment characterization was performed in the first and second phase of the Special Project CHA VIMOCHIC at the following stations: S. Desanding, S. The Agony, S. Cargo House, S. 10 E. Side Rinconada. As the mo...
15
artículo
Publicado 2025
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The sequence of a comprehensive oral rehabilitation is described in a patient with generalized loss of tooth structure, highlighting the importance of restoring stomatognathic system function through a multidisciplinary approach. The patient was a 57-year-old woman diagnosed with occlusal disharmony, generalized attrition due to parafunction, mild dental crowding, defective restorations, carious lesions, and partial mandibular edentulism. Treatment was performed in two phases: initially, an esthetic mini-JIG was used, and occlusion was stabilized by increasing the vertical dimension using stamped composite resins restorations. In the second phase, veneers, vonlays, and implant-supported crowns were placed in the maxilla, along with a removable partial denture in the mandible, followed by delivery of a protective occlusal splint. The combination of analog and digital techniques allowed fo...
16
artículo
Publicado 2024
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The interpretation of biological communities as complex adaptive systems aims to demonstrate their ecological patterns at different scales and their environmental relationships. In this survey, we analyzed species diversity and alternative stable states patterns of the bird community in an Andean agroecosystem located on the central-western slope of the Peruvian Andes (Cajatambo District, Lima - Peru), on a temporal and spatio-temporal scale. We evaluated their bird community through 24 line transects, located in seven plant formations along two ecoregions, between 2 700 and 4 600 masl, during the dry and rainy seasons of 2015 and 2016. The temporal patterns did not show differences in species diversity between seasons. We determined the existence of a single temporary alternative stable states; however, we evidenced changes in their species composition between dry and rainy seasons, sug...
17
tesis de grado
Publicado 2022
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El objetivo de este estudio fue evaluar la variación de la composición de la comunidad y de los grupos funcionales alimenticios de macroinvertebrados bentónicos causada por los factores ambientales en tres sectores de la cuenca del río Chillón. Se establecieron nueve puntos de muestreo ubicados a lo largo del río para medir los factores ambientales (pH, sólidos totales disueltos, temperatura, caudal, conductividad eléctrica, radiación UV-B y oxígeno disuelto) y realizar la colecta de los macroinvertebrados durante las épocas húmeda (abril 2019) y seca (noviembre 2020). Los resultados revelaron que existen diferencias significativas en la abundancia de macroinvertebrados, la cual fue mayor en la época seca, también existen diferencias significativas en la riqueza de macroinvertebrados por sector, siendo el sector medio el que cuenta con la mayor riqueza. Respecto a los grupo...
18
tesis de grado
Publicado 2017
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El presente trabajo de investigación analiza la interacción de la flexibilidad espacial y el paisajismo como principales características para el diseño de un centro empresarial en la ciudad de Trujillo. El proyecto estaría ubicado en un terreno semirústico en el Sector Alto Salaverry, de propiedad de La Cámara de Comercio de La Libertad. Responde al desarrollo económico de la macroregión norte, haciendo necesarias infraestructuras donde sea posible la realización de eventos empresariales que posicionen a Trujillo como la ciudad más importante del norte del país. La investigación inicia con la formulación del problema: ¿Qué principios de flexibilidad espacial y paisajismo podrían ser aplicados en el diseño de un centro empresarial?, la identificación de las limitaciones, el planteamiento de objetivos; siendo el principal determinar qué principios de flexibilidad y pais...
19
tesis de grado
Publicado 2014
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Universidad Nacional Agraria La Molina. Facultad de Ciencias. Departamento Académico de Biología
20
tesis de grado
Publicado 2025
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El estudio propone la implementación de un sistema de terapia móvil potenciado por IA para personas con trastornos de sonidos del habla en Trujillo (2025). Se parte de una ingeniería de requerimientos y se desarrolla un PWA instalable (Chrome/Edge) con ASR (es-PE, fallback es-ES), cálculo de inteligibilidad (1−WER), precisión articulatoria compuesta y fluidez (ppm), además de feedback inmediato, historial, dashboard y exportación/importación CSV. El diseño metodológico es pre–post pareado (n=10; ≈30 días de uso). Las pruebas funcionales confirman el cumplimiento de criterios (cálculo de 1−WER al detener, modo sin ASR operativo y exportación con 8 campos). En resultados, se observan mejoras significativas en inteligibilidad y precisión, con tamaños de efecto moderados-altos, y fluidez dentro de la banda funcional (90–140 ppm). A nivel operativo, la solución ofrec...
