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based extraction » based interaction (Expander búsqueda), acid extraction (Expander búsqueda), phase extraction (Expander búsqueda)
1
artículo
Publicado 2023
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Diabetic foot ulcers are microvascular lesions considered one of the most serious complication of people with diabetes, by not having sufficient caution and care they can evolve into ulcers with difficult and slow healing, coupled with all existing pharmacological treatments, people of indigenous communities complement the treatments by using Traditional Medicine (TM) with adjuvant treatments based on plant extracts that help the wound healing process. The objective was to know the use of Aloe vera, honney, Calotropis procera, Caléndula officinalis, Plectranthus amboinicus y Centella asiática, Jatropha multífida, Phellodendri, Annona muricata L, however, most localized clinical studies are performed in rodents and in-vitro. This is due to the methodologies established to determine the safety and efficacy of use in humans and in this way, through the multidisciplinary health team, coll...
2
artículo
Publicado 2024
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The objective of this study was to evaluate the elaboration of a salami that contains a natural colorant extracted from the seeds of ayrampo (Opuntia soehrensii), using an extract of this natural product at different concentration levels and using microbiological and sensorial characteristics as acceptance criteria of the final product. Initially, a physicochemical characterization of the seeds was carried out, which showed the high nutritional value of this natural product and its antioxidant power. In an experiment aimed at determining the effect of the concentration of the ayrampo seed extract on the quality of salami, it was shown that for extract concentrations between 150 and 250 g / L of water in the meat mass, there are no significant differences in terms of the characteristics of smell, color, taste and appearance of the final product. This was sensory tested through a 9-point h...
3
artículo
Publicado 2024
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The objective of this study was to evaluate the elaboration of a salami that contains a natural colorant extracted from the seeds of ayrampo (Opuntia soehrensii), using an extract of this natural product at different concentration levels and using microbiological and sensorial characteristics as acceptance criteria of the final product. Initially, a physicochemical characterization of the seeds was carried out, which showed the high nutritional value of this natural product and its antioxidant power. In an experiment aimed at determining the effect of the concentration of the ayrampo seed extract on the quality of salami, it was shown that for extract concentrations between 150 and 250 g / L of water in the meat mass, there are no significant differences in terms of the characteristics of smell, color, taste and appearance of the final product. This was sensory tested through a 9-point h...
4
tesis de maestría
Publicado 2013
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Parallel parking, in general, is a moderate difficulty maneuver. Moreover, for inexperienced drivers, it can be a stressful situation that can lead to errors such as stay far from the sidewalk or damage another vehicle resulting in traffic tickets that range from simple parking violation to crash-related violations. In this work, we propose a computationally effective approach to perform a collisionfree parallel parking. The method will calculate the minimum parking space needed and then the efficient path for the parallel parking. This method is computationally inexpensive in comparison with the current state of the art. Moreover, it could be used by any car because the parameters needed to perform all computations are taken from the specifications of real cars. Preliminary results of this work were summarized in [1] that was presented at the 15th International IEEE Conference on Intell...
5
tesis de grado
Publicado 2024
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The clinical analysis laboratory plays a crucial role in the diagnosis and prevention of diseases, consequently, the results of the examinations must be issued under optimal conditions of quality and precision that allow safe medical decisions to be supported. Accreditations such as ISO 15189 are instruments that allow laboratories to ensure, through their criteria and characteristics, results that meet quality standards, ensure traceability and have high reliability, furthermore, the analysis and application of this Standard contribute to the continuous improvement and optimization of resources in clinical laboratories, which generates greater productivity in the processes. In the present investigation, a simulation model of the laboratory service process in a medical center was designed to which proposed improvements were applied considering evaluated criteria of the ISO 15189 Standard...
6
artículo
Publicado 2025
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Information and communication technologies are helping to improve experiences in many areas, such as engineering, simulation, education. It is in the area of education, that thanks to the help of hardware and software, are allowing to improve the educational experiences, in the present work, we resort to the use of the Virtual Reality glasses of the Oculus Gest 2 model, with the Spatial application, applied to the learning of music. We present the architecture of the solution so that it can be replicated and scaled to other courses and subjects of study, we present how to configure each of the tools as well as the alternatives that can be worked in order to optimize resources, as a result we present the advantages and disadvantages of using Virtual Reality technology and recommendations to optimize its application so that it can be replicated and scaled to other applications.
7
artículo
Publicado 2021
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Flavor is one of the most prominent characteristics of chocolate and is crucial in determining the price the consumer is willing to pay. At present, two types of cocoa beans have been characterized according to their flavor and aroma profile, i.e., (1) the bulk (or ordinary) and (2) the fine flavor cocoa (FFC). The FFC has been distinguished from bulk cocoa for having a great variety of flavors. Aiming to differentiate the FFC bean origin of Peruvian chocolate, an analytical methodology using gas chromatography coupled to mass spectrometry (GC-MS) was developed. This methodology allows us to characterize eleven volatile organic compounds correlated to the aromatic profile of FFC chocolate from this geographical region (based on buttery, fruity, floral, ethereal sweet, and roasted flavors). Monitoring these 11 flavor compounds during the chain of industrial processes in a retrospective wa...
8
artículo
Publicado 2023
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Depression is a major public health problem that affects a significant proportion of young adults, such as college students. A process-based approach has been proposed for its study, which seeks to identify transdiagnostic psychological variables that can be the target of change in psychotherapeutic interventions. The purpose of this paper was to analyze the interrelation between a set of process variables (cognitive fusion, rumination, and experiential avoidance), as well as to examine the relationship between each of these variables and depression in 368 college students aged 18–29 years (M = 21.35, SD = 2.36, 77.7% female). Cognitive fusion and rumination were found to comprise an overarching variable termed hyperreflexivity, while experiential avoidance constituted a different construct. By analyzing a structural equation model, it was found that only hyperreflexivity predicted dep...
9
tesis de grado
Publicado 2024
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En la actualidad, muchas empresas del sector textil en Perú, contribuyen de forma considerable en la economía del país, año tras año estas empresas han incrementado el valor de las exportaciones. Es por ello que por ejemplo en el año 2022, antes de finalizar el año, se registró por ejemplo un 24% más que el valor de las exportaciones anuales totales del 2021, esto según lo señalado por el Banco Central de Reserva del Perú (BCRP). El sector textil en el Perú tiene un papel muy importante para poder crecer y desarrollar la industria y economía del Perú, esto se debe a la sinergia de factores que influyen directamente en su composición, factores como la mano de obra, diseño de productos, servicios, entre otros. Debido a ello, algunas empresas han optado por hacer mejoras en diferentes procesos con el fin de mejorar su eficiencia y calidad. Algunas de las tareas por mejorar ...
10
tesis de grado
Publicado 2023
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Currently, Peruvian textile companies have played a very important role in the national economy, therefore, they are constantly seeking to implement production design strategies that allow them to obtain optimum efficiency. Accordingly, this scientific paper aims to increase efficiency in the finishing area by implementing a production model based on Lean-TPM. The results obtained can be of great value for textile industries, especially for those who wish to improve the efficiency of their operations, avoid waste and increase productivity. Therefore, the commitment to adopt new ways of working starts from the highest levels of management down to the operators, and it is important to integrate all members of the production team, because it will lead to achieve great economic benefits and be more competitive in the textile market. This article refers to the implementation of autonomous mai...
11
artículo
Publicado 2023
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Environmental pollution caused by human activities is a global concern, and recycling is an effective strategy to reduce waste and minimize its negative impact on the environment, as these pollutants can have detrimental impact on ecosystems, human health, and the quality of life in general. Recycling avoids the accumulation of waste in landfills, which can contami-nate soil, water, and air as well as reducing the production of new products. The objective of this work is to implement a mobile application to improve waste management by recycling companies. The Mobile-D methodology was used for the development of the project because it focuses on optimizing the efficiency and performance of mobile applications since it allows working in 5 phases which are: Exploration, Initialization, Production, Stabilization and Testing. In the first indicator (KPI-1), an improvement in customer retentio...
12
tesis doctoral
Publicado 2024
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This dissertation investigates the potential improvement of volcanic eruption understanding and forecasting methods by using advanced data processing techniques to analyze large datasets at three target volcanoes (Piton de la Fournaise (PdlF) (France), Sabancaya, and Ubinas (Peru)). The central objective of this study is to search for possible empirical relationships between the pre-eruptive behavior of the accelerated increase in seismic activity using the Failure Forecast Method (FFM) and velocity variations measured by Coda Wave Interferometry (CWI), since both observations are reported to be independently associated with medium damage. The FFM is a deterministic method used to forecast volcanic eruptions using an empirical relationship of increased and accelerated evolution of an observable (e.g., volcano-seismic event rates). The event rates used with FFM in this study were generate...
13
artículo
Publicado 2022
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This study aimed to analyze the effect of problem-based learning on metacognitive abilities in the conjecturing process of junior high school students. To reach this purpose, a mixed-methods design, which is a combination of quantitative and qualitative methods, was used. +e quantitative method was used to analyze the metacognitive abilities of the students’ conjecturing process, while the qualitative method was used to explore observation and interview data. +e subjects of this study consisted of 60 eighthgrade students. Two learning models were compared, namely the problem-based learning model and the conventional learning model. +e metacognitive abilities of students’ conjecturing process were measured by a pattern generalization problem-solving test. After collecting the data and analyzing them through the independent-samples t-test, it was revealed that the PBL had a significant...
14
tesis de grado
Publicado 2024
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The purpose of this work is to provide information on cost improvements in SMEs in the brewing sector using lean manufacturing and BPM. A simulation model was created using Arena and Bizagi, where the model was made with the provision of a small brewing company, the indicators used to measure the effectiveness of the model are: distribution cost per bottle, percentage of use of containers, lead time and OTIF, these indicators seek to provide us with the necessary data to validate the process. This document shows us a more complete vision of the use of these tools and the result of their use. It will contribute to academic and professional work on lean manufacturing and BPM in small companies.
15
tesis de grado
Publicado 2022
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The chemical industry has showed steady growth in recent years and, as a result, the rate of intoxication has increased from the use of dangerous substances by employees of manufacturing companies. Therefore, small & medium enterprises (SMEs) in this industry must be committed to ensuring and guaranteeing safe and ergonomic workstations for employees that are mostly exposed to these risks to prevent incidents and reduce rates to a minimum when handling chemicals to produce paints and varnishes, and, at the same time, improve employee motivation and productivity. For this reason, this paper proposes the implementation of a safety management model based on process standardization and 5S for the purpose of promoting best practices in occupational safety and health, thereby reducing the number of intoxications within company grounds through employee collaboration in the improvement and optim...
16
artículo
Publicado 2023
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The case study is a company that produces and sells plastic containers. Through a production time assessment, the low availability of injection machines was identified as the mam problem. The availability rate for these machines was set at 80.19%, which represented a relevant issue since the worldwide standard is 90%. These low availability rates are mainly due to machine breakdowns, representing 9.87% in lost revenue for the company. To improve machine availability, this study proposed an improvement model combining Lean Manufacturing tools with Kaizen, which refers to continuous process improvement. The model is also integrated with Ergonomics concepts aimed at improving working conditions for operators. Hence, if improvements are achieved regarding human capital, machine availability will also improve. Within this context, the proposed model was piloted at the company, increasing mach...
17
artículo
Publicado 2024
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This work proposes an electronic equipment which determines the marbling grade in beef rib eye according to the American grading scale using digital image processing and machine learning, achieving an 88.89 % coincidence level with grading done by beef specialists. Existing solutions which use image processing usually require calibration methods due to working in non-controlled environments. Furthermore, they only acquire the fat distribution from the longissimus dorsi muscle with an approximate accuracy of 80 %, without referring the distribution to any quality standard. In this work, meat samples are placed in a food grade stainless-steel enclosure with a touch screen and a digital RGB camera. The device acquires an image of the rib eye, which is then analyzed using techniques such as adaptive histogram analysis based on the HSV color model, histogram peaks detection for grayscale thre...
18
artículo
Publicado 2025
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Correctly executing exercises during training is of vital importance to ensure adequate athletic performance. Sit-ups are among the most frequently performed exercises requiring proper evaluation. This exercise contributes to increasing abdomen strength, having better posture to reduce back problems, and improving overall physical condition and appearance, among other benefits. Existing methods for evaluating the correct execution of sit-ups are manual, subjective, and inefficient in terms of time, cost, and precision. Therefore, there is a need to have technological tools that measure and monitor core abdominal strength while simultaneously verifying, through image processing, the correct execution of the exercise. Since no solutions with these capabilities have been found in the literature, this work proposes a system that performs these functions using electromyographic (EMG) sensors,...
19
revisión
Publicado 2021
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The authors are grateful to the S?o Paulo Research foundation (FAPESP, Brazil) for funding the project n? 2019/05043-6 and the ME Caetano-Silva post-doctoral fellowship (2017/16977-4), the National Council for Scientific and Technological Development (CNPq, Brazil) for the PED Augusto productivity grant (306557/2017-7, 310839/2020-3), the Fondo Nacional de Desarrollo Cient?fico, Tecnol?gico y de Innovaci?n Tecnol?gica (FONDECYT, Peru) from the ?Consejo Nacional de Ciencia, Tecnolog?a e Innovaci?n Tecnol?gica? (CONCYTEC, Peru) for funding the project n? 409-2019-FONDECYT, and to the Universidad Privada del Norte (UPN, Peru) for funding the project n? 20201005.
20
artículo
Publicado 2021
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Globally, a large amount of agri-food waste is generated as a result of industrial processes or direct consumption of raw materials, and when discarded, they represent a factor of environmental pollution. Mango by-products have a great bioactive potential, especially because they contain phenolic compounds in which mangiferin predominates, in addition to a great variety of phenolic acids, flavonoids and tannins, which confer antioxidant effects against cancer, cardiovascular and neurological diseases, among others. In addition, it was demonstrated that they have an effect against a broad microbial spectrum, including multiple pathogenic bacteria and fungi such as Escherichia coli and Candida albicans, respectively. According to the literature, mango peel and seed extracts also have potential as an additive, by influencing the sensory and physicochemical characteristics of foods, which ha...
