Tópicos Sugeridos dentro de su búsqueda.
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1
artículo
Publicado 2023
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En este trabajo se presenta la síntesis de Oxido de Titanio (IV) dopado con tierras raras para remoción de cianuro en sistemas acuosos. La síntesis se realizó por el método Sol-gel a partir de un precursor orgánico de Titanio que nos permite obtener la fase anatasa; se obtuvieron 4 materiales uno puro y 3 dopados con Lantano, Cesio y Europio al 1% de concentración molar respectivamente. Los materiales obtenidos se caracterizaron por Difracción de rayos x, Fluorescencia de rayos x, Espectroscopia infrarroja y Microscopia. A cada material de evaluó el porcentaje de remoción de cianuro aplicando una dosis de 1g/L de material a una solución acuosa de 40 mg/L de CN- con ayuda de un reactor con lampara UV que favorece la fotocatálisis y flujo continuo de la solución durante 120 min, cada 20 min se determinó la concentración de CN- para ello se validó un método espectrofotomét...
2
tesis de grado
Publicado 2025
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The research aimed to determine the relationship between accessible tourism for people with hearing disabilities and the development of tourism in the Public Museums of the Iquitos District in 2023. Developing under a basic research, descriptive-correlational level and non-experimental design, taking as population 56 people to whom a survey was applied to collect information. According to the results, 36% consider that accessible tourism is inadequate, this is mainly due to the fact that, in museums, the signage is usually not clear or easy to follow for those with hearing disabilities. In addition, museums rarely offer QR codes with accessible information and staff are almost never trained to serve these people. On the other hand, the development of tourism in the region was rated as regular by 29% of respondents. This indicates that continuous investments have been made in the infrastr...
3
tesis de grado
Publicado 2023
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The objective of this study is to determine the relationship between municipal tax collection and the quality of public services in the Province of Loreto - Nauta, year 2022, I opted for a type of applied study, descriptive level - correlational and non-experimental design; I include as population and sample 349 taxpayers; A technique that was the survey and the questionnaire was used as an instrument for data collection. After the verification of the results, it was established that the municipal tax collection is qualified as regular (25%), this is because the municipality sometimes requires the organizers of public events to pay the tax that corresponds to them, in addition, sometimes there is a specific staff to carry out the respective collection, likewise, the quality of public services on average (26%) since the public cleaning service in said province is never permanent; also, pu...
4
tesis de grado
Publicado 2016
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This research paper entitled "INFLUENCE OF PURCHASING MANAGEMENT IN THE PROFITABILITY OF CARRIER CAIPO S.R.L. CITY HUAMACHUCO "; general objective: To determine the influence of purchasing management in the profitability of Transport Caipo S.R.L. city of Huamachuco., on the issues based on acquisition, management and profitability. inductive-deductive, analytical, synthetic and statistical method: Cross and methods - for this report descriptive research design was used. the survey was used in data collection techniques. From the results, we can note that in the purchasing department was detected which has several shortcomings in procedures such as that do not have database providers, there is no evaluation of suppliers, rarely or never purchase orders are made stop shopping to do, never or almost never control the stock in inventory leads, never or almost never approve purchase orders. I...
5
tesis de maestría
Publicado 2022
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Universidad Nacional Agraria La Molina. Escuela de Posgrado. Maestría en Conservación de Recursos Forestales
6
tesis de maestría
Publicado 2025
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Negotiators of the mining sector are continuously facing challenges due to both the complexity of the process they have to deal with and the great importance that mining industry represent to Peru. Particularly, negotiations with communities does not follow an established formula so as to get successful agreements. This process is surrounded by a variety of factors which involve negotiation dynamics, cultural differences, governance and institutions’ role, and conflict management. Understanding the negotiator’s perspective regarding this process provide valuable insights about the corporate viewpoint in relation to negotiations with communities in the Peruvian mining sector. This research resorts to a qualitative study based on interviews of negotiators to enrich the knowledge with the aim of better understand the negotiation process and the approach towards conflicts when negotiatin...
7
artículo
Publicado 2023
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The páramo ecosystem is a significant centre of Andean bird diversity with high concentrations of threatened species. The Macizo del Cajas Biosphere Reserve’s páramos are a district of the biogeographic páramo province of northern Andes and are therefore considered a conservation hotspot with representative bird diversity. To enhance regional conservation efforts, comprehensive inventories of bird species that occupy this páramo are required. We present an updated bird inventory for the páramos of Macizo del Cajas and included validated records from eBird and GBIF databases along with records from continuous monitoring across this páramo landscape for five years. We also provide notes on habitat affinity and important new, rare, restricted range, and threatened birds. We report 112 bird species within the reserve, including five endemics, and three globally and 12 nationally thre...
8
tesis de grado
Publicado 2025
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Materiales y métodos: se realizó una revisión sistemática cualitativa de estudios publicados entre 1982 y 2021, siguiendo los lineamientos PRISMA. La búsqueda se efectuó en Google Académico, PubMed y Scopus. Se extrajeron datos sobre características de los estudios, uso de AE e impactos en la salud, los cuales fueron organizados y analizados en Microsoft Excel. Resultados: el acceso facilitado a la AE mejora su uso oportuno. La mayoría de los estudios no asocia su uso con un aumento en conductas sexuales de riesgo, aunque uno reportó mayor sexo sin protección tras 12 meses. Los dispositivos intrauterinos (DIU) son más eficaces que las píldoras de levonorgestrel (PAE), las cuales suelen causar efectos leves (náuseas, alteraciones menstruales), aunque se registraron raramente eventos graves como aborto espontáneo. El mayor uso de AE no siempre se traduce en una reducción si...
