51 research outputs found
Implementación de las 5's para optimizar la productividad del área de mantenimiento de la empresa Servicios VyM Semarft, Arequipa, 2021
No full textEl presente estudio formuló como objetivo determinar como la implementación de las 5S optimiza la productividad del área de mantenimiento de la empresa Servicios VYM Semarft, Arequipa, 2021. Bajo una metodología de diseño experimental – transversal, de alcance explicativo, de enfoque mixto, dado que fue cualitativo por la aplicación de herramientas para el diagnóstico y análisis; aplicando la técnica de la observación, tomando comunidad de estudio a la empresa Servicios VyM Semarft. Obteniendo como principales resultados que el personal estaba más participativo, se reorganizó el planteamiento de servicios pendientes y se mejor[ó] el orden y limpieza de las herramientas en el área de mantenimiento. Concluyendo que, gracias a la implantación de la metodología de las 5 S se mejoró la productividad de la empresa en estudio.The objective of this study was to determine how the implementation of the 5 S optimizes the productivity of the maintenance area of the company Servicios VYM Semarft, Arequipa, 2021. Under a methodology of experimental - transversal design, of explanatory scope, of mixed approach, given that it was qualitative by the application of tools for diagnosis and analysis; applying the technique of observation, taking community of study to the company Servicios VyM Semarft, obtaining as main results that the staff was more participatory, the approach of pending services was reorganized and the order and cleanliness of the tools in the maintenance area was improved. It was concluded that, thanks to the implementation of the 5 S methodology, the productivity of the company under study was improved.Campus Arequip
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Mineral Surfaces as Agents of Environmental Proteolysis: Mechanisms and Controls
No full textThe bottleneck in the turnover of soil organic matter (SOM) is the conversion of large molecular compounds into smaller compounds that can be transported through a cell membrane of a microbe for processing. Once inside the cell, organic compounds can be converted into biomass or be respired. The microbial depolymerization of SOM by microbes is catalyzed by extracellular enzymes. SOM is intimately associated with the mineral matrix, which can affect turnover by interfering with the accessibility of OM or the function of extracellular enzymes. Interactions with the mineral matrix have been primarily associated as a protective mechanism of SOM against microbial degradation. But it has been observed that soil minerals can participate in the chemical degradation of organic compounds This dissertation attempts to address whether soil minerals have the capacity to chemically modify or break down proteins in order to infer whether the mineral matrix has the capacity to alter extracellular enzymes in soil. The following research aims to identify what conditions are conducive to protein modifications by mineral interactions. The first research chapter explored how mineral surfaces can switch from sorbents to reactants towards proteins under a gradient of increasing energy similar to fireline intensities experienced in wildfires. The second research chapter observed the mechanisms responsible for proteolysis and the locations of cleavage by minerals. The last research chapter revealed that inserting an amino acid trimer to a model protein was sufficient in altering protein-mineral interactions such as adsorption and fragmentation. Together this work provides evidence to expand the role of protein-mineral interactions to include the degradative functionality of minerals in the cycling of SOM
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Testing Extractants to Study How Protein Interacts with Iron Oxide Minerals
No full textThe goals of this experiment highlighted in this poster were to find a suitable extractant to extract protein adsorbed onto iron oxide minerals and to determine whether those minerals can modify protein. Data obtained from this experiment provides crucial background information to study the effects hydrogen peroxide has on protein in the presence of an iron oxide mineral. We found in this experiment that Sodium dodecyl sulfate and Guanidine Hydrochloride were able to extract some of the protein off of iron oxide minerals. Additionally, NMR spectroscopy was used to analyze the protein for any modification revealed that the extracted protein remained unchanged
Substrate concentration and enzyme allocation can affect rates of microbial decomposition
No full textAbstract. A large proportion of the world's carbon is stored as soil organic matter (SOM). However, the mechanisms regulating the stability of this SOM remain unclear. Recent work suggests that SOM may be stabilized by mechanisms other than chemical recalcitrance. Here, we show that the mineralization rate of starch, a plant polymer commonly found in litter and soil, is concentration dependent, such that its decomposition rate can be reduced by as much as 50% when composing less than ;10% of SOM. This pattern is largely driven by low activities of starch-degrading enzymes and low inducibility of enzyme production by microbial decomposers. The same pattern was not observed for cellulose and hemicellulose degradation, possibly because the enzymes targeting these substrates are expressed at constitutively high levels. Nevertheless, given the heterogeneous distribution of SOM constituents, our results suggest a novel low-concentration constraint on SOM decomposition that is independent of chemical recalcitrance. These results may help explain the stability of at least some SOM constituents, especially those that naturally exist in relatively low concentrations in the soil environment
JAPAN AND SOUTHEAST ASIAN SECURITY
No full textThis thesis addresses why Japan has increased its security cooperation with Southeast Asian institutions and states. It also explores how Japan has increased cooperation in the region. In this analysis, the author uses data from port visits, exercises, joint statements and security cooperation trends from the 1990s through 2018. This thesis concludes that Japan is increasing its cooperation with ASEAN, the Philippines, and Vietnam because it is trying to protect its sea lines of communication, to garner support to condemn North Korean actions, and to gain a permanent seat on the United Nations Security Council.Approved for public release; distribution is unlimited.Lieutenant, United States Navyhttp://archive.org/details/japanandsoutheas109456278
Substrate concentration constraints on microbial decomposition
No full textSoil organic carbon is chemically heterogeneous, and microbial decomposers face a physiological challenge in metabolizing the diverse array of compounds present in soil. Different classes of polymeric compounds may require specialized enzymatic pathways for degradation, each of which requires an investment of microbial resources. Here we tested the resource allocation hypothesis, which posits that decomposition rates should increase once substrate concentrations are sufficient to overcome biochemical investment costs. We also tested the alternative hypothesis that mixing different substrates increases resource acquisition through priming effects involving generalist enzymes. Using a microcosm approach, we varied the soil concentration of seven distinct substrates individually and in mixture. We found that the percent carbon respired from starch, cellulose, chitin, and the mixture was significantly reduced at the lowest substrate concentration. The activities of β-glucosidase and N-acetyl-glucosaminidase that target cellulose and chitin, respectively, were also significantly lower at the lowest concentrations of their target substrates. However, we did not observe parallel declines in enzyme activity with starch or the mixture. Some enzymes, such as β-xylosidase, were consistent with specialist strategies because they showed the highest activity in the presence of their target substrate. Other enzymes were more generalist, with activity observed across multiple substrates. Together, these results suggest that the costs of biochemical machinery limit microbial decomposition of substrates at low concentration. The presence of enzymes with low substrate specificity was not sufficient to overcome this constraint for some substrates. Concentration constraints driven by microbial allocation patterns may be common in mineral soil and could be represented in new biogeochemical models based on microbial physiology
Substrate concentration and enzyme allocation can affect rates of microbial decomposition
No full textPropuesta de mejora en la cadena de suministros para incrementar la rentabilidad de la empresa Metalmecánica Consermet S. A. C.
No full textEl presente trabajo tuvo como objetivo general el incremento de la rentabilidad de la empresa metalmecánica CONSERMET S.A.C.
En primer lugar se realizó un diagnóstico de la situación actual de la empresa. Una vez culminada la identificación de los problemas, se procedió a analizar las herramientas que más aportaban a la solución de dicha problemática.
Es así, que se determinó proponer la implementación de las siguientes herramientas y metodologías: Kanban, Metodología ABC, Check List ISO, cálculo el índice de rotación, balance de línea, selección de proveedores, plan de capacitación y Diagrama de Gantt.
Finalmente, con la información recolectada a través del diagnóstico, se presenta un análisis de resultados con datos cuantitativos para corroborar el logro del objetivo planteado por la autora en la presente tesis.The general objective of this work was to increase the profitability of the metal-mechanic company CONSERMET S.A.C.
First, a diagnosis of the current situation of the company was made. Once the problem was identified, the tools that contributed most to the solution of this problem were analyzed.
Thus, the implementation of the following tools and methodologies has been determined: Kanban, ABC Methodology, ISO checklist, turnover index calculation, line balance, supplier selection, training plan and Gantt Chart.
Finally, with the information collected through the diagnosis, an analysis of results with quantitative data is presented to corroborate the achievement of the objective set by the author in this thesis
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