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1
tesis de grado
Publicado 2020
Enlace
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Universidad Nacional Agraria La Molina. Facultad de Pesquería. Departamento Académico de Acuicultura e Industrias Pesqueras
2
artículo
This article aims to take out guidelines for addressing future pandemics from the recognition of the close relationship between nature and society through the application of the complex adaptive systems approach. From the review, it is concluded that the adoption of the complex adaptive systems approach allows assuming the complexity paradigm when addressing pandemics, reinforcing the reductionist systems approaches that, while it is true that they respond in cause and effect linear situations, they have limitations when facing phenomena with the characteristics of complexity: self-organization (emergency), non-linearity (chaos), adaptation-evolution (cybernetics) and interconnectivity (network structure), among others. From the approach of the complex adaptive systems and the socio-ecological systems, it is possible to understand the close interrelationships and interdependencies betwee...
3
artículo
This article aims to take out guidelines for addressing future pandemics from the recognition of the close relationship between nature and society through the application of the complex adaptive systems approach. From the review, it is concluded that the adoption of the complex adaptive systems approach allows assuming the complexity paradigm when addressing pandemics, reinforcing the reductionist systems approaches that, while it is true that they respond in cause and effect linear situations, they have limitations when facing phenomena with the characteristics of complexity: self-organization (emergency), non-linearity (chaos), adaptation-evolution (cybernetics) and interconnectivity (network structure), among others. From the approach of the complex adaptive systems and the socio-ecological systems, it is possible to understand the close interrelationships and interdependencies betwee...
4
artículo
The aim of this study was to extract collagen from the waste produced in the processing of anchovies (canned and surimi). To this end, non-collagenous proteins was solubilized with a solution of 0,1N sodium hydroxide and neutralized with successive washes with water (pH close to neutral). Then, the residues were decalcified with a EDTA 0,5M solution; degreased with butanol 10% and finally the collagen protein were solubilized with acetic acid 0,5M and precipitated with sodium chloride 2,6M. Collagen precipitated was dialyzed and lyophilized. The hydroxyproline content (Hip) were quantified in waste and lyophilized collagen, getting the values of 6,5 and 52,9 mg of hydroxyproline/g sample, respectively. The solubility of lyophilized collagen decreased about 40% at a concentration of 12% NaCl. Gel electrophoresis showed a strong band of approximately 110 kDa molecular weight that correspon...
5
artículo
The spectacled bear (Tremarctos ornatus) is a vulnerable species because of hunting and destruction of its environment. Also, it is difficult to monitor in the wild hampering the management and research efforts and therefore, the use of non-invasive samples such as faeces becomes a useful tool. The aim of this study was to develop a technique for sexing by the Polymerase Chain Reaction (PCR) using DNA extracted from exfoliated colon cells present in faecal samples. Seventeen samples (from 10 females and 7 males) were collected from bears of known sex reared in captivity in four institutions in Lima Peru. DNA extraction was done by using a specific kit for faecal samples. The concentration of extracted DNA varied between 20 to 30 ng. Using PCR, two gene sequences were evaluated: amelogenin with primers SE47-SE48 and sex-determining region in the Y chromosome (SRY) with primers SRYB5-SRYB3...
6
artículo
The interest of recovering the flotation tailings containing silver , there has been many years ago, mainly by large volumes and significant silver tenors these metals involved. Metallurgical studies to find a suitable treatment scheme for these tailings have been conducted , evaluating alternatives pyro and hydrometallurgical laboratory level. As a conclusion of this work, the hydrometallurgical process of acid leaching was selected - chlorinating, for best metal performance and flexibility. This paper mainly covers the results obtained at the laboratory, where the main variables of the process are evaluated. Such as particle size , concentration and pH of the leaching . The results at the laboratory showed that NaCl solutions acidified with 25% sulfuric acid, it is possible to extract about 40 % of the silver content, value would be limited by the mineralogical composition of the taili...
7
artículo
Publicado 2014
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Enlace
The amount of oleoresin was determined and the bioactive components were quantified by high efficiency liquid chromatograph (HPLC) obtaining, in the chromatograms, lutein, beta-carotene and licopene in large quantities. After determination of fruit maturity index, the fruits were conditioning –it was 4,71–; then were dehydrated at 40°C for 96 hours on a tray dryer, and were ground and sieved by) a mesh with diameter smaller than 425 μm. Subsequently, the cell walls were hydrolyzed to extract lutein from dry tissue using a cellulose enzyme complex. Following leaching was performed using a mixture of hexane, ethanol, acetone and toluene in a ratio of 10:6:7: 7 (v/v/v/v) at a temperature of 35°C for a time of 3 hours. The third treatment gave better results in the extraction of lutein, this was performed at 30°C for 4 hours and substrate:enzyme ratio 1:16. A yield of 98,30 mg lutein...
8
artículo
Publicado 2014
Enlace
Enlace
The amount of oleoresin was determined and the bioactive components were quantified by high efficiency liquid chromatograph (HPLC) obtaining, in the chromatograms, lutein, beta-carotene and licopene in large quantities. After determination of fruit maturity index, the fruits were conditioning –it was 4,71–; then were dehydrated at 40°C for 96 hours on a tray dryer, and were ground and sieved by) a mesh with diameter smaller than 425 μm. Subsequently, the cell walls were hydrolyzed to extract lutein from dry tissue using a cellulose enzyme complex. Following leaching was performed using a mixture of hexane, ethanol, acetone and toluene in a ratio of 10:6:7: 7 (v/v/v/v) at a temperature of 35°C for a time of 3 hours. The third treatment gave better results in the extraction of lutein, this was performed at 30°C for 4 hours and substrate:enzyme ratio 1:16. A yield of 98,30 mg lutein...
9
artículo
Publicado 2019
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Enlace
It was identified the energy potential (PE) of biodiesel generated by microproducers in Arequipa is 8042.2495 MJ * Kg-1 obtained from 50 gallons of biodiesel (B100), for this reason the present research work aimed at the implications techniques to reach the main gaps that must be overcome in research and development (R & D) to achieve the desired PE in the microalgal biomass as the main source of transesterified oil, the research showed that it is possible to obtain0.82 g / l Biomass microalgal from Chlorella sp. in a Raceway system managing to extract 614.90 g / kg of oil from dry microalgal biomass at your reach 554.32 g / Kg of transesterified oil (Biodiesel-B100), to carry out an investigation as a model for the ALDECO microenterprise. The results were determined for a microproducer looking for an energy potential (PE) of 8042.2495 MJ Kg-1 with a feasible production potential (PP...
10
artículo
Publicado 2024
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Enlace
Peru is among the main cocoa exporters, achieving a notable increase in production and, along with it, a growing generation of waste. These wastes, when destined for landfills, lead to pollution that significantly disturbs the environment. The cob is the main waste and is rescued for its pectin content. In this context, the main objective of this research is to explore the viability of extracting pectin from the cocoa shell (Theobroma cacao L.), coming from waste. of the cocoa industry of Peca-Amazonas. To achieve this purpose, a hydrolysis process was implemented at 70 ºC for 120 minutes, using a 0.1 N solution of hydrochloric, fumaric and citric acid as extraction agents. The samples obtained were detailed characterized in terms of yield, equivalent weight, methoxyl degree and AAG content. Likewise, they were characterized using the FT-IR technique, allowing the degree of esterificati...
11
artículo
At present, the use of DNA extracted from non-invasive samples, especially feces, is common practice in the discipline of conservation genetics. Even though DNA analysis is often difficult mainly due to the composition and preservation of feces has been shown in many species with the development of suitable extraction methods is possible to maximize the reliability and effectiveness of such procedures. The objective of this study has been optimization of a protocol for the extraction of DNA from vicuña feces (Vicugna vicugna mensalis), species classified as Near Threatened in Peru, in order to obtain DNA of sufficient quality for molecular analysis. A total of 51 samples were taken from vicuña dung piles in two communities located 4600 meters above sea level in the dry Puna ecosystems of the regions of Junin and Moquegua between August and September 2008. After observing defecation, sa...
12
artículo
Publicado 2021
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This article presents the way religious catholic people get involved in the protection of the ecosystem of the Jaen Vicariate, entrusted to the Company of Jesus. Peasants of the zone, who are migrants from the mountains regions, exploit their new habitat according to their ancestors’ traditions shaped in different context. These agricultural methods are inserted in an enchanted worldview. Religious people to encouragepractices respectful of the environment fight against harmful beliefs and promote a rational and scientific comprehension of the situation, a secularized one. Nonetheless, their initiative is not fully successful. It is very difficult to deal with one aspect of a worldview and change it. Besides, peasants, who often experience great necessities, have assimilated the logic and the expectations of the consumer socie...
13
artículo
The objective of the study was the detection of canine parvovirus type 2 (CPV-2) in young dogs of Lima city with and without clinical symptoms compatible with parvovirus by the PCR technique using primers that can allow the amplification of a fragment of the gene coding for the protein VP2. Rectal swabs were collected from 78 dogs younger than one year old and without a history of previous vaccinations, of which 39 individuals had a clinical diagnosis of canine parvovirus and the other 39 were clinically healthy animals. For the extraction of viral DNA, the fast boiling method was used. Samples were boiled at 100 °C for 10 minutes and then centrifuged to extract the supernatant, which was used as a template for the PCR reaction. Specific primers that amplify a 1316 base pair fragment of the VP2 gene of the CPV-2 virus were used, using a commercial vaccine as a positive control. The viru...
14
tesis de grado
Publicado 2019
Enlace
Enlace
La determinación de las propiedades geométricas de las discontinuidades como su orientación y espaciamiento, implica en el método convencional limitaciones como: (1) elevado consumo de tiempo, (2) la zona en estudio puede ser inaccesible, este puede ser inalcanzable o llegar a ser peligroso, (3) factor humano, la data tomada en campo está sujeta a la subjetividad, especialmente bajo restricciones de tiempo. Por lo tanto se hace necesario el empleo de nuevos métodos que salven estas limitaciones. Por otro lado, el avance tecnológico en los últimos años en la tecnología LiDAR, cámaras fotográficas digitales y el desarrollo de nuevas técnicas fotogramétricas como Structure from Motion, permiten obtener modelos digitales 3D de los macizos rocosos en forma de una nube de puntos, los cuales pueden ser procesados mediante algoritmos computacionales para determinar las propiedades ...
15
artículo
Publicado 2017
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Enlace
Peruvian retail market today, more than ever, has turned the phrase “everything goes through the eyes” into a competitive tool. The design and optimization of space, as well as visual merchandising, are techniques that impact the sale new concepts such as omnicanality and buying experience are fed by data analytics in order to describe the commercial mode; and new qualitative sources of information, among them color theory, specially help to understand and predict the impact of future decisions on the point of sale. This paper describes the utility of image processing techniques to innovate the retail market in the effort to extract useful information from advertising pieces frequently used in this sector.
16
artículo
Publicado 2017
Enlace
Enlace
Peruvian retail market today, more than ever, has turned the phrase “everything goes through the eyes” into a competitive tool. The design and optimization of space, as well as visual merchandising, are techniques that impact the sale new concepts such as omnicanality and buying experience are fed by data analytics in order to describe the commercial mode; and new qualitative sources of information, among them color theory, specially help to understand and predict the impact of future decisions on the point of sale. This paper describes the utility of image processing techniques to innovate the retail market in the effort to extract useful information from advertising pieces frequently used in this sector.
17
tesis de grado
Publicado 2014
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El presente trabajo de tesis desarrolla un Data Mart para el apoyo al proceso de toma de decisiones del área de área administración y finanzas de la Municipalidad Distrital de los Baños del Inca. Debido a que sus sistemas actuales no soportan el manejo adecuado de grandes volúmenes de información, tienen el problema de utilizar su información para emplearla en la toma de decisiones de la institución. Para llevar adelante el desarrollo del Data Mart se utilizó la metodología de Kimball, conformada por las siguientes etapas: • Planificación: En este proceso se determina el propósito del proyecto de DW/BI, sus objetivos específicos y el alcance del mismo, los principales riesgos y una aproximación inicial a las necesidades de información. • Análisis de requerimientos: Se debe aprender tanto como se pueda sobre el negocio, los competidores, la industria y los clientes del...
18
Publicado 2021
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El objetivo de este trabajo de investigación es dar a conocer que lo primordial de la educación inicial es contribuir al desarrollo de los niños entre los primeros meses de vida y los 5 años de edad, además de brindarles una atención integral en un ambiente de calidad que promueva el crecimiento y desarrollo de sus competencias y habilidades. La educación inicial se preocupa por la perspectiva del respeto a los niños, considerándolos como sujetos de la ley y necesitados de condiciones específicas para su desarrollo; capaces de pensar, actuar, manipular el entorno y extraer lo que realmente necesitan para hacerlo crecer y modificarlo. Enseñar a los niños sobre números y cantidades es un proceso progresivo. Funciona porque se debe a la acción que realiza el niño sobre los elementos de su entorno y progresa porque las acciones que realiza se vuelven más complejas. Por esta r...
19
artículo
The present article analyzes the emergence and evolution of flexisecurity strategy in the European context, different conceptualizations, their effects regarding the protective function of labor law and lessons that can be extracted from previous experiences in Latin America and particularly Peru concerning the subordination of social and labor policies on the policies of employment generation.
20
tesis de grado
Publicado 2023
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En la actualidad existe un fuerte sector de la población peruana que padece de anemia debido a una mala alimentación y a los escasos recursos que poseen. Está problemática ha generado, más que una oportunidad, la necesidad de realizar un proyecto social que beneficie a todas estas personas. Por lo tanto, la presente tesis consiste en un estudio de pre factibilidad de una planta productora de proteína en polvo a base de anchoveta para combatir la anemia. Tal como se mencionó anteriormente, la elección del tema se origina por los múltiples casos de anemia y desnutrición en el Perú y ahora más aún dada la coyuntura vivida por el Covid-19. El principal valor agregado es la utilización de insumos peruanos. Asimismo, la proteína no solo será rico en hierro, sino también en omega 3 y grasas saludables, lo que lo haría de nuestro producto aún más atractivo hacia el consumidor...
