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1
tesis de grado
Publicado 2023
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En la era digital, la captación de leads de calidad para los programas de MBA que ofrecen las escuelas de postgrado de universidades privadas se convierte en un desafío estratégico. Para abordar este reto, es imperativo combinar enfoques innovadores con métodos tradicionales de pago. En este resumen, se analiza cómo atraer leads de calidad tanto a través de medios digitales novedosos como TikTok, enfoques orgánicos y virales, como mediante plataformas tradicionales de pago, como Meta, LinkedIn y Google Ads. Asimismo, examinaremos a fondo la relevancia de conceptos cruciales, como el marketing digital y el marketing de contenido, que desempeñan un papel fundamental en la adquisición de leads de calidad. Además, exploramos cómo la colaboración con influencers y la creación de pilares sólidos de contenido se traducen en estrategias efectivas para atraer prospectos de alto valo...
2
artículo
Publicado 2002
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The main oxidized lead minerals are: cerussite and anglesite, which due to their crystallography and wettability should not be buoyant, for this reason it is necessary to study the flotation properties for these minerals, the main ones are: solubility, surface physico-chemical , thermodynamics, fines content and others, it is concluded that anglesite is less buoyant than cerussite, both can be floated directly with amyl xanthate: long-chain hydrocarbon collector and cationic collectors such as alamine 26-D. The flotation of oxides improves when they are previously sulfurized before adding xanthate type collector, obtaining economically acceptable results. The above is applied to a polymetallic mineral of galena, sphalerite and cerussite; up to four flow charts are discussed, two are experimented, and with the bulk flotation scheme Pb-Zn, followed by flotation of oxides, after sulfurizati...
3
tesis de grado
Publicado 2024
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El presente trabajo de investigación examinó las estrategias de comunicación que una prestigiosa universidad de Lima emplea en Facebook para la captación de leads, durante el mes de mayo de 2024. Se realizó un análisis minucioso mediante la aplicación de herramientas de fichas de observación y entrevistas a especialistas en comunicación y marketing. Estas metodologías permitieron evaluar en detalle las publicaciones y actividades en la página oficial de la universidad, así como obtener perspectivas valiosas sobre las estrategias utilizadas. Los datos recopilados fueron analizados para describir, evaluar y proponer mejoras en la comunicación institucional. El enfoque cualitativo, con un diseño fenomenológico, facilita una comprensión profunda de las experiencias y percepciones relacionadas con las estrategias de captación. En conclusión, la investigación ofrece una visi...
4
artículo
Publicado 2013
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Lead, a metal that has been extensively used since antiquity, can be found in the majority of persons. This metal affects systems, organs, and tissues. The thresholds for its toxic effects vary from individual to individual. Probably because they are in the process of development and due to cer tain physiological, pathological y behavioral characteristics children usually absorb a greater proportion of lead with more severe outcomes than adults. Public health services can identify areas where people has a higher risk for lead intoxication and establish requirements for screening, early diagnosis and adequate treatment. The determination of lead in venous blood is the most sensitive test for the evaluation of lead exposure. Experts recommend maintaining a level below 10 μg/dL. This article reviews origin, effects, diagnosis and treatment of lead intoxication.
5
artículo
Publicado 2005
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Lead, a ubiquitous heavy metal, has been found in places as unlikely as Greenland’s fossil ice. Egyptians and Hebrews used it. In Spain, Phoenicians c. 2000 BC worked ores of lead. At the end of the XX century, occupational lead’s poisoning became a public health problem in developed countries. In non-developed countries occupational lead poisoning is still frequent. Diagnosis is directed to recognize lead existence at the labor environment and good clinical and occupational documentation. Differential diagnosis considers neurological and abdominal pain syndromes. Both blood lead and zinc-protoporphyrin levels are trustworthy and crucial analysis. In exposed workers, blood-lead can attain 40 ug/100 mL and even 80 ug/100 mL in unhealthy industries workers and zincprotoporphyrin is above 4 ug/g of hemoglobin. Treatment consists mainly in calcium disodium edetate, d-penicillamid lead’...
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8
artículo
Publicado 2022
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The present investigation describes the various environmental socioeconomic problems and the risks that threaten health, due to the development of the secondary lead industry in Peru, this situation contrasts the state of the secondary lead industry with developed countries and proposes objectives of alternatives. sustainable for the Peruvian territory. The method used is descriptive and comparative, consisting of the search, evaluation and analysis of the facts. Currently, lead-acid batteries are disposed of in open-air dumps without measures to protect human and environmental health, and legal provisions are also lacking. Batteries contain toxic elements that can increase the levels of air, soil and water pollution in the areas where they are dismantled. It is concluded that lead is recognized as a toxic and dangerous substance. because they generate toxic gases causing damage to man, ...
9
artículo
Publicado 2023
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The impact of mining activity does not only generate royalties to the government but also contamination by heavy metals such as lead which is one of the main products that cause concern for public health, as they can cause various abnormalities such as headache, irritability, ataxia, seizures, cerebral edema, anemia, renal, hepatic and reproductive failure. In 2018, inhabitants from Huacho (Ancash Region, Perú) complained about lead poisoning. The objective of this research is to determine lead concentrations in soil and water and their correlation with the presence of this metal in the blood of Huacho inhabitants. This research studied the blood results from the 63 tested inhabitants since 71,4% of them had high concentrations of lead in their blood. Samples from drinking and crop irrigation water, and agricultural soil were taken, was analyzed by inductively coupled plasma optical emi...
10
artículo
Publicado 2023
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The impact of mining activity does not only generate royalties to the government but also contamination by heavy metals such as lead which is one of the main products that cause concern for public health, as they can cause various abnormalities such as headache, irritability, ataxia, seizures, cerebral edema, anemia, renal, hepatic and reproductive failure. In 2018, inhabitants from Huacho (Ancash Region, Perú) complained about lead poisoning. The objective of this research is to determine lead concentrations in soil and water and their correlation with the presence of this metal in the blood of Huacho inhabitants. This research studied the blood results from the 63 tested inhabitants since 71,4% of them had high concentrations of lead in their blood. Samples from drinking and crop irrigation water, and agricultural soil were taken, was analyzed by inductively coupled plasma optical emi...
11
artículo
Publicado 2010
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Polymetallic sulfide ores are found in abundance in nature and especially in our country, hence the great importance of studying their behavior in the differential flotation. There are ores that are very amenable to flotation and there are also other complex minerals that have a very complicated flotation because of different factors, the most difficult ones are those with natural activation of sphalerite and iron sulphides due to soluble salts that the mineral can have as a result of the presence of metal ions from different metals, mainly copper. The copper, lead and zinc ore that was studied did not show difficulties during the selective flotation; the quality and the separation efficiency of concentrates can be improved with more time and more stages of flotation cleaning. We defined the theoretical concepts of the selective flotation and made the mineralogical and chemical study of ...
12
artículo
Publicado 2010
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Polymetallic sulfide ores are found in abundance in nature and especially in our country, hence the great importance of studying their behavior in the differential flotation. There are ores that are very amenable to flotation and there are also other complex minerals that have a very complicated flotation because of different factors, the most difficult ones are those with natural activation of sphalerite and iron sulphides due to soluble salts that the mineral can have as a result of the presence of metal ions from different metals, mainly copper. The copper, lead and zinc ore that was studied did not show difficulties during the selective flotation; the quality and the separation efficiency of concentrates can be improved with more time and more stages of flotation cleaning. We defined the theoretical concepts of the selective flotation and made the mineralogical and chemical study of ...
13
artículo
Publicado 2023
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Lead is a toxic substance that can be present in toys through their decorative painting and that, when absorbed orally by children, can lead to chronic intoxication through bioaccumulation. As a result, in Peru, Maximum Permissible Limits (MPL) of 90 ppm or mg/kg have been established according to D.S. No. 008-2007-SA. Thus, the objective of the present investigation was to determine the concentration of lead in educational toys (puzzles) to determine if they are within the Maximum Permissible Limits (MPL) and its relationship with the places of sale, country of origin and if it has sanitary authorization. Samples were analysed by the ICP-OES method. The 92,85% of toys had lead concentrations above 90 ppm/Pb. The values had a maximum of 3712,5 90 ppm/Pb and a minimum of 60 ppm. Therefore, it was concluded that lead concentration in most toy paints exceeds the established values for lead....
14
artículo
Publicado 2021
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In recent times there has been a great increase in the production of refined lead through the recycling of lead acid batteries. Their ease of collection and high reuse rates represent a sustainable alternative, only if they are carried out in a proper way. If an environmental framework is not established to ensure adequate preservation of natural resources and protection of human health, their use would not be sustainable. In this context, this study established an environmental risk analysis in all stages of the lead acid battery recycling process in order to identify possible environmental risk scenarios. The study was carried out under the methodology based on the UNE 150006-2008 standard. The results obtained reveal that at a global level there is a moderate environmental risk with a characterization of 57.5%, however, with respect to the human environment, a significant risk of 68% ...
15
artículo
Publicado 2020
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The various anthropogenic activities pollute environmental resources in one way or another; One of the pollutants with the greatest impact is heavy metals. Lead removal capacity was studied (II) using the fungal biomass of Rhizopus sp. Rhizopus sp was grown in potato dextrose broth medium, it was worked in a batch system where the removal tests were carried out with lead metal (II), evaluating the influence of the parameters of pH, temperature and initial concentration of metal (II). The Rhizopus sp biomass manages to efficiently remove the lead (II) metal from aqueous solutions, determining the optimal parameters for the removal of lead, values of pH 5, temperature of 25 ° C and initial metal concentration of 50 ppm with which lead is achieved (II) in 85,49%, 84,19% and 99,90% respectively. Bioremediation represents an alternative to treat wastewater with heavy metals, as it is a low-c...
16
artículo
Publicado 2006
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RESUMO OBJETIVO: Estudar a relação entre níveis séricos de chumbo e funções cognitivas em crianças expostas a esse metal. MÉTODO: Este é um estudo transversal que incluiu 134 crianças de 6 a 8,5 anos de idade, de três escolas localizadas em El Callao (Peru), e com riscos diferentes de exposição ao chumbo. As avaliações de suas funções cognitivas foram realizadas utilizando-se o Teste Gráfico de Raciocínio e o Teste dos Cubos de Kohs. Foram medidos os níveis séricos de chumbo RESULTADOS: As crianças com níveis séricos de chumbo > 10 ug/dl apresentaram maior prevalência de baixa pontuação no Teste Gráfico de Raciocínio (18,9% vs. 7,1%, p = 0,049) e também no Teste dos Cubos de Kohs (39,6% vs. 18,6%, p = 0,01), quando comparadas com aquelas com níveis séricos menores. Um déficit de uma categoria no Teste Gráfico de Raciocínio foi associado com um aumento n...
17
artículo
Publicado 2008
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Introduction: Work with lead is a universal industrial problem, especially when done without labor hygiene approach. Lead Peruvian’s mining and metallurgy maintains good quality programs for management of occupational health, but informal Peruvian industry does not. Objectives: To determine the actual heath status of handicraft and informal batteries factories workers using blood lead levels as exposition indicators. Design: Observational and transversal study. Setting: Ilo, Peru’s Occupational Health Service Hospital. Participants: Workers at four handicraft informal batteries factories. Interventions: Information was obtained from 41 workers by direct interview, from August 1999 through January 2000. For blood lead levels determination we used atomic absorption spectrophotometry with graphite oven, and for hemoglobin, microhematocrit. We obtained percentages, averages, ranges, and ...
18
artículo
The acquisition and generation of knowledge through research is one of the research is one of the fundamental pillars for all sciences in general. all sciences in general. The process to carry out a research work is The process of conducting research is driven by the scientific method, which aims to validate a hypothesis through a series of systematic steps (1). In the field of health sciences, research converges on the knowledge of an area of interest or a research question, using the scientific research methodology to analyze and test the hypothesis formulated. However, the "types" of research can be considered different compared to other areas and are referred to as "research designs".
19
artículo
Publicado 2020
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The various anthropogenic activities pollute environmental resources in one way or another; One of the pollutants with the greatest impact is heavy metals. Lead removal capacity was studied (II) using the fungal biomass of Rhizopus sp. Rhizopus sp was grown in potato dextrose broth medium, it was worked in a batch system where the removal tests were carried out with lead metal (II), evaluating the influence of the parameters of pH, temperature and initial concentration of metal (II). The Rhizopus sp biomass manages to efficiently remove the lead (II) metal from aqueous solutions, determining the optimal parameters for the removal of lead, values of pH 5, temperature of 25 ° C and initial metal concentration of 50 ppm with which lead is achieved (II) in 85,49%, 84,19% and 99,90% respectively. Bioremediation represents an alternative to treat wastewater with heavy metals, as it is a low-c...
20
tesis de maestría
The objective of the present study is to demonstrate wheter lead user method is more useful than traditional market research method as a source of innovation for e- businesses. Also, to prepared a contribution about the use of lead user method as a source of innovation in e-business, adding new facts and implications that help to improve the actual knowledge about the topic in order to encourage the best practice in the field. Making an interpretative approach in study field, I could find some answers to my research question. Firstly, main characteristics firms expect a new market research method have in order to apply it for their market researches are the use by recommendation and faster in results. Secondly, the choosing of a market research method, must to generate value through the use of KPI´s and reflected in one of the five dimensions of e-commerce value grid. Finally, even Scho...
