Tópicos Sugeridos dentro de su búsqueda.
Tópicos Sugeridos dentro de su búsqueda.
Buscar alternativas:
de container » de containers (Expander búsqueda), a container (Expander búsqueda), de contener (Expander búsqueda)
para de » parada de (Expander búsqueda)
de container » de containers (Expander búsqueda), a container (Expander búsqueda), de contener (Expander búsqueda)
para de » parada de (Expander búsqueda)
1
tesis de grado
Publicado 2024
Enlace
Enlace
Pollution originating from the life cycle of packaging is increasing and can have potentially irreversible consequences for the environment. In the beverage industry, the most common materials used for the production of primary packaging are glass and plastic. The objective of this study was to compare the environmental impacts of polyethylene terephthalate and glass bottles. The Leopold Matrix was applied to evaluate the environmental impact of the life cycle of both bottles, using information from a wide range of scientific articles and peer-reviewed indexed journals. The evaluation took into account the abiotic, biotic, and anthropic components generating negative consequences for ecosystems, human health, and fauna and flora. The study found that both containers generate negative environmental impacts throughout their life cycle. This was evidenced in the results of the matrix, where...
2
tesis de grado
Publicado 2021
Enlace
Enlace
Plataforma digital donde estudiantes y trabajadores audiovisuales encuentren ofertas de locaciones para sus producciones.
3
artículo
Publicado 2005
Enlace
Enlace
The adsorption of Cu (II) has been investigated for treated biomasses of orange shells, lemon shells and nopal, which contain pectin in its composition. The dry and crushed biomass was treated with NaOH, which produces the desmetoxilation of the pectin, later was treated with a solution 0,2 M of CaCl2, which allows improving the mechanical stability of the biomasses. The good pH in the process of bioadsorción of the Cu (II) was in the range of 4 - 4,5. The capacity biosorption these biomasses is evaluated in batch. The biosorption isotherms are described by the models of Langmuir and Freundlich. According to the pattern of Langmuir, the maximum capacities of adsorption (qmáx) of the treated biomasses were: shell of orange 36,23 mg/g, lemon 46,95 mg/g and nopal 44,25 mg/g.
4
artículo
This study deals about the design and evaluation of Tetra Pak containers' recycling plant on a small scale. The basic Plant Engineering was found from the information gathered. Some aspects included were: product design, process design, equipment design and costs evaluation, with the aim of determining its technical, economical and environmental capability for its implementation.
5
artículo
This study deals about the design and evaluation of Tetra Pak containers' recycling plant on a small scale. The basic Plant Engineering was found from the information gathered. Some aspects included were: product design, process design, equipment design and costs evaluation, with the aim of determining its technical, economical and environmental capability for its implementation.
6
artículo
Introduction: The literature on economics proposes different provider payment mechanisms at hospitals in order to obtain incentives in health care cost containment. Objectives: To analyze the theoretical foundations of implemented cost restraint instruments, payment associated to diagnosis (PAD), and payment for valued assistance (PFV) during the last two decades and their effectiveness on the Chilean sanitary system. Design: Econometric and non parametric analysis. Setting: Chile. Materials: Data from Chile’s Ministry of Health and the National Health Fund was used. Interventions: Application of time series methodology, data envelopment analysis and multinomial logit model to detect whether payment mechanisms have had the desired effect on cost containment. Main outcome measures: Effects of hospital payment system. Results: Results have shown that the second payment system, in additio...
7
artículo
Publicado 2025
Enlace
Enlace
The growing demand for functional foods has encouraged the development of innovative products using native ingredients with high nutritional value, such as Nostoc sphaericum (cushuro), a cyanobacterium traditionally consumed in high Andean regions. This study aimed to evaluate the nutritional profile and sensory acceptability of a snack made from cushuro collected in the Razuhuillca lagoon, Ayacucho, Peru. A screening experimental design was applied to analyze 13 formulations with variations in seven ingredients (two dehydrating agents, three stabilizers, and one pH regulator), followed by proximal analysis of the fresh and osmotic-dehydrated product, as well as sensory tests of four attributes. The optimal snack contained 1.20 % protein, 78.03 % carbohydrates, 324.92 kcal/100 g, 73.6 mg/100 g of calcium, and 3.86 mg/100 g of iron. In sensory terms, the most accepted formulation (F8) com...
8
artículo
Publicado 2021
Enlace
Enlace
In the present work, a mathematical model is developed which involves the equations of fluid mechanics and the energy equation to determine the temperature field of the liquid steel that enters a container to solidify, a situation commonly found in production processes of steel today. Using mathematical techniques, a simplified equation of the energy equation is obtained in which a non-dimensional parameter Pe, the Peclet number, allows to evaluate the transport of the heat by convection to the transmission by diffusion occurred in the mold that contains liquid steel. Using finite differences method, the mathematical model formulated is solved numerically to visualize the cooling process of the liquid steel, from the beginning until the solidification process starts. Likewise, the numerical computations are carried out using GNU-Octave, which is a platform to the scientific programming w...
9
artículo
Publicado 2021
Enlace
Enlace
In the present work, a mathematical model is developed which involves the equations of fluid mechanics and the energy equation to determine the temperature field of the liquid steel that enters a container to solidify, a situation commonly found in production processes of steel today. Using mathematical techniques, a simplified equation of the energy equation is obtained in which a non-dimensional parameter Pe, the Peclet number, allows to evaluate the transport of the heat by convection to the transmission by diffusion occurred in the mold that contains liquid steel. Using finite differences method, the mathematical model formulated is solved numerically to visualize the cooling process of the liquid steel, from the beginning until the solidification process starts. Likewise, the numerical computations are carried out using GNU-Octave, which is a platform to the scientific programming w...
10
artículo
Publicado 2002
Enlace
Enlace
Efluentes industriales conteniendo metales disueltos deben ser tratados para su disposición al ambiente a fin de cumplir con los niveles permitidos por la autoridad ambiental. Estos efluentes se generan debido a la actividad minero–metalúrgica y a los procesos de drenaje ácido. En el caso de empresas de la pequeña minería el objetivo de abatir la concentración de metales disueltos en sus efluentes resulta difícil lograr conforme a estándares ambientales debido principalmente a limitaciones financieras. El presente estudio enfoca el tema planteando el método de la precipitación química y luego un proceso de adsorción mediante resinas de intercambio iónico, lo que permitirá obtener el efluente libre de metales disueltos. Se analizan las ventajas y factores que intervienen en el proceso en base a pruebas de laboratorio para escalamiento a procesos de flujo en trabajos futuro...
11
artículo
This research was developed in order to analyze the management and management of mercury-containing lamps and to identify the health and environmental risks related to their mercury content. Taking into account that mercury is a natural and toxic substance, which once released into the environment it can remain and circulate in air, water and soil. It also causes a wide range of systematic effects in humans (kidneys, stomach, lungs and nervous system). In Peru, the lamps are considered as waste of electrical and electronic equipment (WEEE) at the end of their useful life. The environmental problem they present is their mercury content, is not essential for any metabolic process and is bioaccumulable in living beings. Taking into account the risk it represents, many countries of the world, including Peru, signed the Minamata Agreement, and have been implementing national planning and mana...
12
artículo
Publicado 2019
Enlace
Enlace
The objective of the research was to estimate mathematical models for lead migration (μg/l) from a cellulose matrix using a neutral pH food simulant, taking two independent variables: total migration (mg/dm2 ) and the contact area (dm2 ), using multiple linear regression. The evaluated samples were two cellulose containers destined to the contact with food, being the origin of the cellulose from Chile and Brazil. Total and specific migration tests were carried out with the methodologies of Resolution No. 12 of MERCOSUR (1995) and method 3111 B of APHA (2005) respectively, under conditions of prolonged contact and at a temperature of 50 °C. The results of this research show that only the model for Brazilian pulp (Y = -55,864 – 0,304X1 + 9,173X2) was statistically adequate to make forecasts, with its correlation coefficient (R2) of 0,899. From the descriptive statistical analysis, the ...
13
artículo
Publicado 2021
Enlace
Enlace
The present investigation carried out a study on exposure to noise doses to workers in a company that manufactures, and markets hydrolytic glass containers type 1. The objective is to characterize the exposure profiles of the GES by comparing the results with the LMP. The study population is made up of all workers exposed to noise and the population of 103 and a sample of 45, the methodology used is that of the worst condition and according to the AIHA guidelines. The results were analyzed according to two indicators, maximum value for samples smaller than 6 and in case of higher evaluations it was analyzed under the UCL, obtaining as results 9 groups of GES, of which 89% present a level of exposure without hearing protection greater than the LMP.
14
artículo
Publicado 2020
Enlace
Enlace
Introduction: The evolution of the COVID-19 pandemic varies in each population; it has been complicating health systems worldwide. Objective: to analyze the evolution of the Covid-19 pandemic, estimating the effect of the containment measures practiced in Peru. Material and Method: The SIR epidemiological mathematical modeling was applied, estimating the COVID-19 evolution in our population. Data analysis was performed following the SIR mathematical model with defined ordinary differential equations to simulate epidemiological behavior; and it was executed in the RStudio programming language. Results: Containment measures decreased the propagation rate, reducing 30% of infected cases until the peak day of infection; however, it is still above the effective reproductive number to control the epidemic and it shows an erratic trend, the result of government actions being 61% in the practice...
15
artículo
Publicado 2013
Enlace
Enlace
This paper deals with a particular kind of phraseological units present in thespeech of the Quechua-speaking users of the dialect of Ayacucho: nominal and verbal locutions of the human body (somatisms). The analysis of these units is focusedon the description and explanation of the cultural context that motivates themeaning these expressions show in the Andean mentality. Thus, it is postulatedthat the Quechua language and culture are decisive, both as a system and Andeanmentality, for the resemantization of such units.
16
tesis de grado
Publicado 2025
Enlace
Enlace
Polyethylene terephthalate (PET) is a widely used material in container manufacturing, particularly in bottle production. It is characterized by its low cost and widespread availability. However, its improper disposal has significantly exacerbated global plastic pollution. For instance, less than 50% of plastic bottles are recycled. Moreover, studies indicate that this issue has led to a significant accumulation of plastic waste in the oceans, which continues to grow annually and could be considered floating islands of debris. This study proposes replacing PET with polylactic acid (PLA), a biodegradable and biocompatible polymer with suitable properties for bottle production. PLA also has a shorter decomposition time compared to PET, contributing to the reduction of carbon footprint and greenhouse gas emissions. The research methodology included a diagnostic phase to define objectives, i...
17
artículo
Publicado 2019
Enlace
Enlace
El cáncer de mama es una patología prevalente; la neoplasia papilar intraquistica representa solo el 1% de todos ellos, pueden ser divididos en infiltrantes y no infiltrantes. Se presenta el caso de una mujer de 46 años, que acude por un tumor de mama izquierda sospechoso, con biopsia core sin evidencia de carcinoma, se decidió realizar una Resección local radical de tumor con diagnóstico papiloma intraductal con carcinoma ductal in situ, se realizó cirugía de ampliación de márgenes y biopsia de ganglio centinela con técnica de azul patente con resultado negativo, seguida de Radioterapia. Este reporte resalta la importancia de considerar que las lesiones papilares pueden albergar lesiones malignas, por lo que es recomendable realizar exéresis completa de la lesión para realizar un tratamiento adecuado.
18
artículo
Publicado 2019
Enlace
Enlace
El cáncer de mama es una patología prevalente; la neoplasia papilar intraquistica representa solo el 1% de todos ellos, pueden ser divididos en infiltrantes y no infiltrantes. Se presenta el caso de una mujer de 46 años, que acude por un tumor de mama izquierda sospechoso, con biopsia core sin evidencia de carcinoma, se decidió realizar una Resección local radical de tumor con diagnóstico papiloma intraductal con carcinoma ductal in situ, se realizó cirugía de ampliación de márgenes y biopsia de ganglio centinela con técnica de azul patente con resultado negativo, seguida de Radioterapia. Este reporte resalta la importancia de considerar que las lesiones papilares pueden albergar lesiones malignas, por lo que es recomendable realizar exéresis completa de la lesión para realizar un tratamiento adecuado.
19
artículo
Publicado 2018
Enlace
Enlace
In Lima during the summer months, ambulatory sales do not meet quality standards for the sale of bottled water. A recent study by Shotyk et al, reported elevated levels of antimony in potable water stored in polyethylene terephthalate (PET) containers1 For this reason, the concentration of antimony in bottled water was studied in three samples during the months of February and March of 2013 of ambulatory sale on Alfonso Ugarte and Nicolás de Piérola avenues of metropolitan Lima in relation to the environmental temperature of sampling and the time of packaging. It was found that the average concentration of antimony on Alfonso Ugarte avenue was 1610 ng/L, The average concentration of antimony on Nicolás de Piérola avenue was 1600 ng/L. The antimony concentration of the samples of bottled water of ambulatory sale on Alfonso Ugarte and Nicolás de Piérola avenues was less than the máx...
20
artículo
Publicado 2025
Enlace
Enlace
This paper analyses the new criterion of “rational administration of assets”, provided for in the bankruptcy crime of article 463 of the Chilean Penal Code, recently amended by the Economic Crimes Law, No. 21,595 of August 2023. For such purposes, the article compares this standard with other equivalent criterions, such as “orderly economic management” or “diligence in the management of economic affairs”. The paper concludes that, beyond the terminological issue, all these standards point in the same direction. Additionally, the article highlights that the Chilean criterion is not only more precise and adequate in criminal law matters, but can also have a broad scope, capable of extending to crimes such as disloyal administration or fraud against the State.
