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Tópicos Sugeridos dentro de su búsqueda.
1
artículo
Publicado 2019
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In the present study, the stabilization of horse manure (mixture of rice husk, manure and horse urine) was evaluated through an aerobic process similar to composting. The stabilization process was evaluated in two piles of horse manure for 16 weeks, taking samples every week. A decrease in temperature from 66,7 to 41,0 °C, the reduction of the density from 394,0 to 370,4 kg/m3, the reduction of the water retention capacity from 220,7 to 125,6% and the reduction of the respiratory activity of 9.8 to less than 2 mgO2/g ms/d, were indicators of the stabilization of the horse manure, the easily degradable material of manure and urine were removed by aerobic degradation and washed with irrigation, leaving only the rice husk with a minimum fraction of other materials. On the other hand, the increase in total nitrogen and a decrease in the C/N ratio at the end of the week 16 were indicative of...
2
artículo
Since the first publications on the study of microorganisms in composting, the progress has been impressive, because microbiological and molecular biological methods have been used to identify the structure of microbial communities during the process. The interaction of physico-chemical parameters and the type of composting system determine variations in the diversity and abundance of microbial species. The metabolic activity of mainly bacteria and fungi allows the degradation of organic matter and contributes to the maturation of compost, the main product of aerobic composting. In this process, bacteria are the most abundant group, comprising the Phyla Proteobacteria, Firmicutes, Actinobacteria and Bacteroidetes, followed by fungi, mainly the phylum Ascomycota. The interest in the inoculation of compost with exogenous microorganisms is increasing, due to the benefits they provide thanks...
3
artículo
Since the first publications on the study of microorganisms in composting, the progress has been impressive, because microbiological and molecular biological methods have been used to identify the structure of microbial communities during the process. The interaction of physico-chemical parameters and the type of composting system determine variations in the diversity and abundance of microbial species. The metabolic activity of mainly bacteria and fungi allows the degradation of organic matter and contributes to the maturation of compost, the main product of aerobic composting. In this process, bacteria are the most abundant group, comprising the Phyla Proteobacteria, Firmicutes, Actinobacteria and Bacteroidetes, followed by fungi, mainly the phylum Ascomycota. The interest in the inoculation of compost with exogenous microorganisms is increasing, due to the benefits they provide thanks...
4
tesis de grado
Publicado 2023
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En los últimos años, la traducción médica ha experimentado un notable aumento en su demanda, consolidándose como un campo especializado de gran relevancia. Dicho crecimiento se ve reflejado en el aumento de diversos tipos de estudios relacionados con la traducción médica y sus diferentes aspectos, como los desafíos dentro de la industria, vinculados a las particularidades inherentes de los textos médicos. Debido a que las diferencias lingüísticas, pragmáticas y culturales entre idiomas son el origen de dificultades durante el proceso de traducción, un hecho que se ve reflejado en la traducción especializada. El propósito de este trabajo es contribuir al avance de la traducción médica, ofreciendo estrategias destinadas a abordar desafíos en niveles léxicos, semánticos, morfosintácticos, y estilístico-pragmáticos, presentes en el proceso de traducción de inglés a e...
5
artículo
Publicado 2024
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In the oxidation ponds, there is an alarming accumulation of sedimentable organic matter, despite the absence of direct tributaries. Although the presence of potentially contaminating elements is suspected, their origin and repercussions still require clarifi cation. It is necessary to determine the organic matter to assess the value of sedimentat ion in this context. Th e study aimed to evaluate the concentration of sedimentable organic matter without effl uent discharge in the Parcona Lagoon, Ica-Peru. Th e Walkley-Black method was used to determine the organic matter in the sediments. After preparing the sample with specifi c reagents, absorbance at 590 nm was measured using a DR-5000 UV-vis spectrophotometer, with reference standards for calibration. A concentration was found at the fi ve sampling points of 3.87; 4.13; 2.96; 3.44; and 2.21 mg/kg, respectively. Th e concentration of o...
6
artículo
Publicado 2018
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The squid (Dosidicus gigas) is a cephalopod mollusk, a source of high quality proteins that is currently underexploited. The objective was to develop the methodology for the elaboration of a pre-cooked pota product, to evaluate the digestibility of the proteins and the shelf life of the product. Methodology: In a descriptive and experimental design, the nutritional technological study was carried out. Two samples of squid each consisting of 5 kg of the mantle, acquired at the Callao Fishing Terminal, were processed and analyzed independently. The process flow included: disinfection, cutting, washing, stabilization, cutting into strips, cooking by immersion in vegetable oil, packaging and storage. The physical and chemical analysis, using AOAC techniques; minerals using GBC Avanta atomic absorption spectrophotometer with graphite furnace. The digestibility by enzymatic method. The sensory...
7
artículo
Publicado 2020
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The processing parameters that maximize the pulp yield and the stability of the ungurahui nectar were evaluated by means of the Taguchi and Response Surface methodologies. The raw material used came from the town of Yurimaguas, Loreto Region - Peru, and was subjected to weighing, selection, classification, washing, disinfecting, maturing, pulping, refining, filtering, standardized (to formulate the nectar), pasteurized, packed, cooled and stored processes. In the first stage the parameters of maturation and pulping were obtained (T°: 51,99 °C, time: 1,74 h, fruit harvested: water in maturation (1: 3), ripened fruit: water in the pulped (1: 0,75)), which optimized the yield (37,33%) of ungurahui pulp. In the second stage the standardized parameters were determined (pulp: water (1: 1,33), percentage of gums: xanthan (0,02 %), arabica (0,03 %), carboxymethylcellulose (0,06 %) and lecithin...
8
tesis de grado
Publicado 2022
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El matadero Municipal de Pacora brinda sus instalaciones a matarifes locales para realizar el servicio de faenado con la finalidad de abastecer de carne de ganado vacuno, porcino, caprino el mercado local, actualmente el matadero no cuenta con las condiciones adecuadas debido a que no se cumple con el 35,29% de los requisitos generales y el 60% de los requisitos de diseño del decreto supremo DS 015- 2012-AG, afectando así la inocuidad de la carne obtenida. Para corroborar ello se realizó un análisis microbiológico y los resultados obtenidos mostraron un recuento mayor en aerobios mesófilos de 105 ufc/g, lo cual hace al producto rechazable. La presente investigación tiene como objetivo principal rediseñar el Matadero Municipal de Pacora y así poder obtener un producto inocuo. Para ello se realizó un un check list de los requisitos del decreto se analizó la demanda de ganado, lo...
9
artículo
La pancreatina, sustancia conformada por la mezcla de enzimas digestivas, con aplicaciones en el campo médico-farmaceútico, por su origen y método de producción requiere ser sometida a un proceso de descontaminación. Así, muestras de pancreatina en polvo fueron empacadas en bolsas de polietileno de baja densidad y tratadas con radiación gamma a las dosis de 2, 3, 5, 6, 7, 8, 13 y 25 kGy. Se realizaron las pruebas microbiológicas y físico-químicas, indicadas en la US Pharmacopea, a las muestras irradiadas y control, para determinar la dosis óptima de descontaminación que permitiría el uso comercial del producto. Se determinó que las dosis mínima de 5 kGy era adecuada para descontaminar el producto ya que se lograba disminuir 3 ciclos logarítmicos de la carga inicial de microorganismos aerobios mesófilos en la muestra control, que incluía bacilos esporulados. De igual mod...
10
artículo
Iron is a fundamental element for life, being essential in vital processes such as oxygen transport, electron transfer, enzymatic reactions, aerobic metabolism, photosynthesis or nitrogen fixation. Given the relevance of this element in metabolic routes central to life development, it is unsurprising that a great number of pathologies are linked to iron metabolism problems. Iron pathological species that appear in the frame of some diseases are nanometric materials, whose characterization presents huge difficulties. Detailed knowledge of these species may have great relevance in different problems such as the improvement of malaria diagnostic techniques or the treatment of neurodegenerative diseases.
11
tesis de grado
Publicado 2018
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Universidad Nacional Agraria La Molina. Facultad de Pesquería. Departamento Académico de Acuicultura e Industrias Pesqueras
12
tesis de grado
Publicado 2022
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Universidad Nacional Agraria La Molina. Facultad de Industrias Alimentarias. Departamento Académico de Tecnología de Alimentos y Productos Agropecuarios
13
artículo
Publicado 2018
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El objetivo del trabajo fue evaluar la presencia de metales pesados (arsénico, cadmio, mercurio y plomo), Salmonella, E. coli, así como el recuento de mesófilos, hongos y levaduras y el recuento de Clostridium sulfito reductor en concentrados destinados para la alimentación de cerdos de cuatro regiones de Colombia. Se recolectaron 38 muestras de concentrados de 19 granjas para el análisis de metales pesados. Las muestras se procesaron por triplicado y se analizaron mediante espectrometría de absorción atómica acoplada a plasma. Para el análisis microbiológico se procesaron 391 muestras de 22 granjas. Para la detección de Salmonella se usó el equipo MDS-3M y su presencia se confirmó usando Maldi-tof, en tanto que para el recuento de E. coli se usó agar cromógeno (Petrifilm); para los aerobios mesófilos se empleó el agar plate count, y para hongos y levaduras el agar rosa ...
14
tesis de grado
Publicado 2019
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This research seeks to solve the problem with respect to municipal wastewater in the district of Cachicadán by designing a municipal wastewater treatment plant, for this design the methodology of the OS standard was followed. 090 for wastewater treatment plants and the Technical Regulations for the Drinking Water and Basic Sanitation Sector, RAS 2000 and 2017, as well as the slope section method for flow rates obtaining a design flow rate of 16.39 L/s. To carry out this research, a compilation of information was made and the population was projected for the life of the WWTP in accordance with the RAS 2017, with a characterization study that determined the parameters that do not comply with the regulations in force were suspended solids with 110 mg / L, oils and fats 15.4 mg / L, DBO 344.8 mg / L, dissolved oxygen 3.94 mg / L and COD 519.93 mg / L. An aerobic process was selected for the...
15
tesis de grado
Publicado 2024
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La investigación evaluó el comportamiento de la carga orgánica del superficial de un reactor de biopelícula de lecho móvil (MBBR) a escala real para el tratamiento de las aguas residuales de una industria de soluciones parenterales determinando que la variación de la carga orgánica del superficial removida (SARR) está relacionada con la carga orgánica del superficial aplicada (SALR) existiendo una correlación muy fuerte entre ambas variables. La evaluación del MBBR se realizó bajo condiciones aerobias (concentración de oxígeno disuelto de 1.81 a 3.84 mg/L) obteniéndose eficiencias de reducción de la DQO del 46.7% al 80.7%; y para la DQO soluble; del 69% al 88.3%, cuando se aplicaron SALR no mayores a 9.12 gDQO/m2.d y 4.98 gDQOsol/m2.d, y se empleó un portador móvil con área superficial específica de 643 m2/m3, porcentaje de vacíos de 72.85% y tasa de llenado de 45.94...
16
artículo
Publicado 2016
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The research aimed to apply the system of organic sterilization (OSS) in maca, determining the process parameters: time and temperature steam injection saturated reduce the count of aerobic microorganisms, molds, yeasts, E. coli, Salmonella and coliform total, and evaluating the influence of process in total glucosinolate content. The maximum microbial decontamination of maca was achieved by applying a load of 5 kg/pouch for 6 min. With a temperature of 100 °C saturated steam injection. Under these conditions, the reduction of the microbial load was 99,9 % (< 10 UFC/g), 50% (< 10 UFC/g) and 93,3% (< 10 UFC/g) for aerobic, molds, and yeasts, respectively; pathogen behavior was very similar to that of the raw material: E. coli < 3 UFC/g, absence of salmonella (25 g) and < 3 UFC/g for total coliforms. Glucosinolate content was maintained during the process in 1,5 μmol/g, wh...
17
artículo
Publicado 2016
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The research aimed to apply the system of organic sterilization (OSS) in maca, determining the process parameters: time and temperature steam injection saturated reduce the count of aerobic microorganisms, molds, yeasts, E. coli, Salmonella and coliform total, and evaluating the influence of process in total glucosinolate content. The maximum microbial decontamination of maca was achieved by applying a load of 5 kg/pouch for 6 min. With a temperature of 100 °C saturated steam injection. Under these conditions, the reduction of the microbial load was 99,9 % (< 10 UFC/g), 50% (< 10 UFC/g) and 93,3% (< 10 UFC/g) for aerobic, molds, and yeasts, respectively; pathogen behavior was very similar to that of the raw material: E. coli < 3 UFC/g, absence of salmonella (25 g) and < 3 UFC/g for total coliforms. Glucosinolate content was maintained during the process in 1,5 μmol/g, wh...
18
artículo
Publicado 2013
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Fresh tomatoes Italian variety were subjected to surface disinfection processes using calcium hypochlorite solutions to determine their germicidal efficiency and kinetics that governs the surface inactivation process in aerobic mesophilic bacteria, yeasts and molds. Chlorine as surface disinfectant was effective against aerobic mesophilic bacteria, yeasts and molds in this order, the resistance of aerobic mesophilic bacteria, yeasts and molds of their values expressed in zchlorine was 455, 500 and 625 ppm respectively. Aerobic mesophilic bacteria present in the tomato surface show a higher resistance to chlorine disinfection according contact time germ- tomato skin is greater due to a better adherence to the tomato skin making it difficult for the action of chlorine on germs; this effect is not present in the case of yeasts or molds. Experimental Dchlorine 20°C values and Dchlorine_20°...
19
artículo
Publicado 2013
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Fresh tomatoes Italian variety were subjected to surface disinfection processes using calcium hypochlorite solutions to determine their germicidal efficiency and kinetics that governs the surface inactivation process in aerobic mesophilic bacteria, yeasts and molds. Chlorine as surface disinfectant was effective against aerobic mesophilic bacteria, yeasts and molds in this order, the resistance of aerobic mesophilic bacteria, yeasts and molds of their values expressed in zchlorine was 455, 500 and 625 ppm respectively. Aerobic mesophilic bacteria present in the tomato surface show a higher resistance to chlorine disinfection according contact time germ- tomato skin is greater due to a better adherence to the tomato skin making it difficult for the action of chlorine on germs; this effect is not present in the case of yeasts or molds. Experimental Dchlorine 20°C values and Dchlorine_20°...
20
artículo
Publicado 2008
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It was developed a biotechnological process to reduce chemical oxygen demand (COD) & Biochemical Oxygen Demand (BOD) from industrial waste water, simultaneously, it was evaluated the potential bioconversion of some yeast into Food yeast & ethanol production. It was produced a reduction of the Chemical Oxygen Demand (COD) and Biochemical Oxygen Demand (BOD) of potatoes starchy processing industry from 22,5000 Chemical Oxygen Demand (COD) and Biochemical Oxygen demand (BOD) of COD to 1480 mg O2/ L and 26,400 mg O2/L BOD to 2100 mg O2/ L BOD with an aerobic mixed culture of Candida tropicalis BT-UNSM 124 and LIpomyces sp BT-UNMSM-145. It was produced a reduction of Chemical Oxygen Demand (COD) and Biochemical Oxygen Demand (DBO) of dairy effluent diluted from 22,100 mg O2/ L COD to 1280 mg O2/ L and 17,500 mg O2 / L BOD to 1100 mg O2/ L of BOD with an aerobic culture of Kluyveromyce...
