Universidade Estadual do Oeste do Paraná
Recent publications
Due to the increasing use of electric power distribution resources based on inverters, emerged a concern about the power quality in distribution systems. This is because these new elements can insert voltage or current imbalance in the system due to the configuration change and the presence of power electronics. The main disturbances caused by this equipment are voltage imbalance, harmonic distortion and long-term voltage variation. Therefore, this research aimed to analyze the power quality of distributed systems considering the variation in penetration and allocation of distribution generation and batteries represented by the output of the inverters. The IEEE 34 bus system was used for analyzing, adapted to the Brazilian electrical system, and considering low voltage branches. The results obtained showed that for each electromagnetic disturbance there is an allocation that results in smaller insertions of this disturbance, and it is not possible to have an allocation, among those analyzed, that help to mitigate all disturbances in the system. The penetration of distributed generation directly affects the power quality disturbances, causing some harmonics to increase. As for the long-term voltage variation and voltage imbalance, it depends on the system configuration.
This work investigated the efficiency of pressurized liquid extraction (PLE) to obtain oil and active compounds from crambe seeds, using dimethyl carbonate (DMC) and ethanol as solvents. The Box-Behnken experimental design was used to evaluate the influence of experimental conditions (addition of ethanol to DMC, pressure and temperature) on extraction mass yield (EMY) and yield of phytosterols (PY) and γ-tocopherol (TY). In the condition that provided the maximum value of the evaluated response variables, the effect of the solvent to seed ratio and solvent was determined, as well as the comparison with the data from the application of conventional extraction by Soxhlet. From the results obtained, it was found that the temperature and the addition of ethanol to the DMC had a high influence on the removal and quality of the oil. The addition of 50% ethanol to the DMC, low pressure (50 bar) and high temperature (150 °C) allowed obtaining the highest values for the response variables and the validation of the model was verified by high correlation between the predicted (EMY: 36.43%; PY: 925.44 mg per kg of seeds; TY: 536.66 mg per kg of seeds) and experiments (EMY: 39.35%; PY: 914.57 mg per kg of seeds; TY: 533.29 mg per kg of seeds) values. PLE resulted in EMY higher than that obtained in the Soxhlet extraction, and for the different solvents tested, EMY followed the order DMC + ethanol > ethanol > DMC. The use of ethanol in PLE provided a high content of active compounds compared to the use of the solvent mixture, however, it presented greater extraction of non-lipid compounds. The main fatty acids present in crambe oil were erucic and oleic, the iodine value and the fatty acid composition were similar for the different solvents/extraction technique. In general, the presence of natural antioxidants and the high oxidative stability of the oil showed that it has the potential to be applied in the synthesis of biodiesel.
The evolution of parallel architectures points to dynamic environments where the number of available resources or configurations may vary during the execution of applications. This can be easily observed in grids and clouds, but can also be explored in clusters and multiprocessor architectures. Over more than two decades, several research initiatives have explored this characteristic by parallel applications, enabling the development of adaptive applications that can reconfigure the number of processes/threads and their allocation to processors to cope with varying workloads and changes in the availability of resources in the system. Despite the long history of development of solutions for adaptability for parallel architectures, there is no literature reviewing these efforts. In this context, the goal of this paper is to present the state of-the-art on adaptability from resource and application perspectives, ranging from shared memory architectures, clusters, and grids, to virtualized resources in cloud and fog computing in the last twenty years (2002-2022). A comprehensive analysis of the leading research initiatives in the field of adaptive parallel applications can provide the reader with an understanding of the essential concepts of development in this area.
The negative changes of obesity to the locomotor system are a major concern in the current scenario, where obesity and metabolic syndrome are recurrent in Western societies. A physical exercise is an important tool as a way to rehabilitate obesity, highlighting whole-body vibration, as it is an easy-access modality with few restrictions. In this sense, we sought to evaluate the effect of whole-body vibration on the extensor digitorum longus muscle on a monosodium glutamate-induced obesity model. The main findings of the present study are related to the ability of the treatment with vibration to reduce the obesogenic characteristics and slow down the dyslipidemic condition of the animals. Likewise, the vibration promoted by the vibrating platform was essential in the recovery of the muscle structure, as well as the recovery of the muscle’s oxidative capacity, initially compromised by obesity.
This work aimed to obtain sustainable catalysts for environmental catalysis. The ITQ-2 and MCM-22 layered zeolites impregnated with cerium (5 and 10%) were synthesized from a sustainable approach employing silica (R) from low-cost and abundant Brazilian agro-industrial waste, rice husks. The results indicate the type of support, porosity, surface defects and concentration of Ce influenced the size and dispersion of cerium oxide-nanoparticles (NPs). At the same Ce loading (5%), the porosity and surface defects followed the order R (46 m² g⁻¹) < MCM-22 (341 m² g⁻¹) < ITQ-2 (475) m² g⁻¹) and resulted the decrease of NPs size (7.3 > 6.5 > 5.7 nm). The ITQ-2 and MCM-22 containing 10% of Ce resulted in the decrease of porosity of 422 and 329 m² g⁻¹ and the increase of NPs size (7.5 and 8.3 nm), respectively. The DRS UV-Vis and XPS results indicated that Ce⁴⁺ and Ce³⁺species were present in all synthesized materials. The materials were evaluated for the gas-phase total oxidation of volatile organic compound (benzene) as a model reaction to reduce atmospheric pollutants. The best oxidation results were achieved at 350 °C for the Ce-impregnated ITQ-2 (5 and 10% of Ce) reaching benzene conversions of 84 and 91%, respectively, and followed by Ce-impregnated MCM-22 (5 and 10% of Ce) with 70 and 79%, respectively. No loss of activity was observed after 16 h of reaction for both Ce-impregnated ITQ-2 and MCM-22 with 10% of Ce.
The silkworm, Bombyx mori L. (Lepidoptera: Bombycidae), is susceptible to several entomopathogens, including the fungus Beauveria bassiana (Bals.‐Criv.) Vuill. (Hypocreales), which causes white muscardine. Aiming at effective alternatives for disease control, the effect of one pyridinium salt (PS) and seven imidazolium salts (IS) on biological parameters of this fungus – conidia germination, colony‐forming units (CFU), vegetative growth, and conidia production – were evaluated in vitro. Then, the in vivo action of the IS on silkworm larvae and pupae was verified. Preventive and curative actions of selected IS for disease suppression in B. mori caterpillars were evaluated either via oral or integumentary administration. When administered daily via feeding sheets, the IS 1,3‐di‐n‐decyl‐2‐methylimidazolium chloride at 100 μg ml‐1 was effective in reducing the mortality of caterpillars by the fungal infection. In addition, it did not show any negative effects on developing B. mori larvae. Therefore, 1,3‐di‐n‐decyl‐2‐methylimidazolium chloride can be an effective tool in the management of white muscardine in silkworm rearing houses.
The aim of this study was to verify the presence of glyphosate in breast milk and to characterize maternal environmental exposure. Sixty-seven milk samples were collected from lactating women in the city of Francisco Beltrão, Paraná, living in urban (n=26) and rural (n=41) areas, at the peak of glyphosate application in corn and soy crops in the region (April and May 2018). To characterize the study population, socio-epidemiological data of the women were collected. To determine glyphosate levels, a commercial enzyme immunosorbent assay kit was used. Glyphosate was detected in all breast milk samples analyzed with a mean value of 1.45 µg/L. Despite some descriptive differences, there were no statistically significant differences (P<0.05) between the categories of the variables tested. Also, glyphosate was detected in drinking water samples from the urban area and in artesian well water from the rural area of the region where the studied population lived. The estimation of the total amount of glyphosate ingested by breastfeeding babies in a period of 6 months was significant. These results suggest that the studied lactating population was contaminated with glyphosate, possibly through continued environmental exposure.
Objective: To characterize Home Care Services in the state of Santa Catarina, Brazil, and to know the care demands of children with special health care needs. Method: Descriptive, exploratory study with a quantitative approach. Data collection carried out through a questionnaire, via Google Forms, with professionals from seven Home Care Services, from April to July 2020. Data were organized in the software Excel and analyzed through descriptive statistics with frequency and percentage distribution. Results: Of the seven services participating in the study, in 85.7% the nurse is the teams' coordinator. Opening hours in most services are during the day, on weekdays and weekends, and all of them receive referrals from Primary Health Care teams. Regarding care demands, all children need psychomotor and social rehabilitation, 72.2% use oxygen therapy, 66.6% gastrostomy, 55.5% tracheostomy, and 50% mechanical ventilation. Conclusion: Home care presents complexities due to chronic conditions and the use of technological devices. Thus, home care teams are fundamental in the assistance and training of family members/caregivers for children home care.
O objetivo deste trabalho é descrever casos clínicos e séries de casos relacionados a alterações oftalmológicas em pacientes com diagnóstico de COVID-19. Foi realizada uma revisão narrativa/descritiva de casos clínicos e série de casos. A partir das buscas de dados com descritores pré-definidos, foram integrados na revisão, 17 estudos. Dentre os principais temas identificados, destacam-se: alterações conjuntivais, alterações retinianas e oftalmoparesias. O quadro de alterações da conjuntiva foi prevalente em relação aos demais. Essa revisão incluiu não apenas afecções oculares em adultos, mas também, em crianças e adolescentes. O estudo chama atenção para o fato de que as alterações oculares foram descritas como alteração isolada, alteração precipitante e alteração simultânea ao quadro respiratório. Conclui-se que as afecções oculares vão além de alterações conjuntivais, embora sejam essas preponderantes, havendo ainda alterações retinianas, quadro de oftalmoparesia e ainda a incomum síndrome de Miller Fisher. Novos ensaios irão poder avaliar, qual é de fato, a representatividade dos problemas oculares na cadeia epidemiológica da COVID-19.
Lentinus crinitus bioaccumulates lithium in mycelia, but bioaccumulation may be affected by pH of the culture medium. Lithium is used in clinical practice as a mood stabilizer and antidepressant. This study aimed to assess the effect of culture medium pH and lithium source (LiCl or Li2CO3) on lithium bioaccumulation in vegetative mycelia of L. crinitus grown in malt extract broth. Lentinus crinitus U9-1 was cultured in malt extract broth supplemented with Li2CO3 or LiCl (50 mg L−1 lithium) in the pH range of 3.0 to 6.0. The pH was adjusted using HCl solution. The results showed that medium pH affected mycelial biomass production, lithium bioaccumulation in mycelial biomass, and lithium transfer from the culture medium to mycelial biomass. The effect of lithium source on the bioaccumulation capacity of mycelial biomass varied according to pH. At pH 4.0, both lithium sources stimulated mycelial biomass production compared to the control without the addition of lithium. At pH 5.5, Li2CO3 provided the highest lithium bioaccumulation in mycelial biomass. Lithium transfer from the culture medium to mycelia was highest in Li2CO3-supplemented cultures at pH 4.5. LiCl reduced hyphal width compared with Li2CO3 and the control. However, pH and lithium sources did not affect the formation of clamp connections in hyphae. For the first time, the influence of the pH of the culture medium on lithium bioaccumulation by Lentinus crinitus is reported. Finally, we conclude that the culture medium pH affected lithium transfer and bioaccumulation in mycelial biomass differently depending on the lithium source. Additionally, we report the presence of clamp connections in the hyphae of L. crinitus as an indicator of even growth.
The design and management of various hydraulic structures (such as stormwater drains, bridges and dams) require the estimation of rainfall with duration of a few minutes up to 24 h or more. Intensity-duration-frequency (IDF) curves links probability of occurrence to a given rainfall intensity. The procedure for obtaining IDF curves basically involves two steps: (i) frequency analysis for different durations and (ii) modeling of IDF curves. In the first step, this study aimed to adequately select the upper tail weight of the following distributions: generalized extreme value (GEV), generalized logistic (GLO) and generalized Pareto (GPA). In the second step, this study aimed to evaluate the performance of three models of IDF curves. The traditional model (M1) was compared with empirical model (M2) and a second-order polynomial model (M3). To perform this study, rainfall data from the city of Caraguatatuba (São Paulo state, Brazil) for the period between 1971 and 2001 were used, for time intervals between 10 and 1440 min. The main conclusions were: (i) GLO and GEV had heavy upper tail while GPA had light upper tail, impacting quantiles with T > 100 years; (ii) M3 presents errors lower than M1 for return periods greater than 100 years.
Background Important risk factors for the most common sexually transmitted infection (STI) in the world, human papillomavirus (HPV), include early sexual activity, use of contraceptives, tobacco smoking, and immunological and genetic factors. This study aimed to investigate the relationship between GSTM1 and GSTT1 polymorphisms and HPV infection and associated risk factors in a group of women assisted in the public health system of southwestern Paraná, Brazil. Methods and results A case–control study was designed with 21 women with HPV matched by age in the case group and 84 women without the virus in the control group. Viral detection was conducted via polymerase chain reaction (PCR) and GSTM1 and GSTT1 genotyping by Multiplex PCR. The results showed that the GSTT1 null allele was a protective factor against infection (ORadj 0.219; 95% CI 0.078–0.618; p = 0.004). No relationship was observed for the GSTM1 gene. Smoking was defined as a risk factor (ORadj 3.678; 95% CI 1.111–12.171; p = 0.033), increasing the chances of HPV by up to 3.6 times. Conclusion This study showed, for the first time, the relationship between GSTM1 and GSTT1 genetic polymorphisms and HPV. We found that this relationship protected women from southern Brazil from viral infection, but not from susceptibility.
The aim of this paper was to evaluate the effect of personality traits on the relationship between obedience pressure and the creation of budgetary slack. Concatenating the dark triad personality traits and obedience pressure in a decision-making scenario relating to the creation of budgetary slack enables us to widen the investigation of factors associated with the practicing of budgetary slack. The relevance of this study lies in understanding how personality traits influence decision making under hierarchical obedience pressure in relation to the creation of budgetary slack, enabling us to measure and detect possible biases in managers’ decision making due to these factors, thus being able to predict or mitigate decisions in the organizational environment. It was verified that the practice of creating budgetary slack can be carried out independently of a hierarchical order and that personality traits influence decision making with relation to the execution and planning of budgets. The article makes theoretical contributions to the accounting area, enabling the advancement and deepening of the discussion of social aspects (obedience theory) and behavioral aspects (personality traits) associated with decision making relating to the creation of budgetary slack. The approach is quantitative and experimental (2 x 2 factorial design), using 82 accounting sciences students. The data were analyzed using Mann-Whitney and Kruskal-Wallis tests and binary logistic regression. It was found that, independently of being under obedience pressure, individuals with high dark triad personality traits were more inclined toward the creation of budgetary slack, demonstrating that the intrinsic personality traits of each individual have an effect over decision making. However, regarding obedience pressure, it was verified that there was no significant effect on the creation of budgetary slack. These results offer contributions to organizations, as their managers and teams do not practice slack due to obedience pressure scenarios, but rather according to personality traits.
ABSTRACT Parasitoids of the genus Trichogramma are promising for the biological control of insect pests in several crops, including cassava, which is severely attacked by Erinnyis ello L., 1758 (Lepidoptera: Sphingidae). Evaluating the biological aspects of these parasitoids to understand their dynamics is an important step towards the implementation of this control strategy in the field. Thus, our objective was to evaluate the biology of Trichogramma manicobai Brun, Moraes & Soares, 1984, and T. marandobai Brun, Moraes & Soares, 1986 in E. ello eggs. The parasitoids were obtained by collecting E. ello eggs from a commercial production of cassava, and the host’s eggs were obtained from laboratory and greenhouse rearings. The average duration of a generation (T), net reproduction rate (R0), intrinsic rate of increase (rm), and the finite rate of increase (λ) were estimated, and from these, the fertility life table was calculated. The results indicated that T. marandobai has both higher net reproduction rate and a higher intrinsic rate of increase as well as requires less time to double its population than T. manicobai. Thus, T. marandobai has potential for natural and conservative biological control of E. ello. In addition, its potential in applied biological control should be evaluated through studies on the viability of its mass rearing in alternative hosts and its dispersion behavior in the field.
Objective: To assess sociodemographic data and patterns of leisure time physical activity in older adults (≥ 60 years of age). Methods: This descriptive study analyzed secondary data from older adults interviewed for the 2018 Surveillance System for Risk and Protective Factors for Chronic Diseases by Telephone Survey. Results: Of 53395 adults who completed the survey, 20981 were aged ≥60 years (6468 men and 14 513 women). Walking was the most prevalent physical activity. Most older adults engaged in physical activity 3-4 days per week for 30 minutes or longer. Sessions lasting more than 60 minutes were reported by 54.33% of participants. The rate of older people engaging in leisure time physical activity decreased with age and low education. Older adults engaging in physical activity were more optimistic about perceived health status and were less likely to be smokers than their inactive peers. Conclusions: In this sample, older adults with a higher level of education were more active in their leisure time and were more optimistic about their health status; however, the level of physical activity decreased with age in both sexes.
RESUMO Objetivo caracterizar os Serviços de Atenção Domiciliar em funcionamento na Paraíba. Método trata-se de uma pesquisa descritiva, exploratória, de abordagem quantitativa. A coleta de dados foi realizada entre março e junho de 2020 com profissionais e coordenadores do Serviço de Atenção Domiciliar de 17 municípios paraibanos a partir da utilização de formulário no Google Forms enviado por correio eletrônico. Os dados foram analisados estatisticamente por meio de frequências absolutas e relativas. O projeto foi aprovado pelo Comitê de Ética em Pesquisa. Resultados 14 equipes (61%) estavam em atividade de segunda a sexta-feira; 16 (69,6%) utilizavam o transporte assistencial compartilhado com outros serviços; 11 equipes (47,8%) não utilizavam prontuário eletrônico do paciente e, dentre as que utilizavam, o faziam no formato interligado à Rede de Atenção à Saúde ou em comunicação apenas com o Serviço de Atenção Domiciliar (34,8%; 17,4%). Quanto ao Projeto Terapêutico Singular, 13 equipes (56,5%) o elaboravam. O processo de referência e contrarreferência ocorria apenas na admissão e na alta em 19 equipes (82,6%). Conclusões e implicações para a prática evidenciou-se a necessidade de adequações no funcionamento do serviço e de melhorias nos recursos tecnológicos, comunicação e transporte a serem implementadas pela gestão pública para a qualificação da assistência domiciliar.
Objective: The objective was to assess the effects of different doses of an essential oil blend (EOB) on growth performance, diarrhea occurrence (DO), hematological and blood biochemical profile, intestinal morphometry, morphology and microbiology, relative weight and length of organs, digestive content pH, and liver antioxidant status in weaning pigs. Methods: A total of 135 barrows (7.09±0.29 kg body weight) were allotted randomly in a randomized complete block design based on body weight with nine replications and three animals per pen. Dietary treatments were a negative control (NC): basal diet; positive control (PC): NC plus 125 mg performance-enhancing antibiotic (enramycin 8%)/kg feed; NC plus 100 mg EOB/kg feed (EO100); NC plus 200 mg EOB/kg feed (EO200); and NC plus 400 mg EOB/kg feed (EO400). Diarrhea occurrence was monitored daily, and performance at the end of each phase. Results: Gain to feed ratio was greater (p<0.05) in starter II pigs fed EO400 and EO200 than in those fed EO100. Pigs fed EO400 had lower (p<0.05) DO than those fed NC and EO100 in the total period. Pre-starter II pigs fed NC had (p<0.05) lower serum total protein and plasma protein than pigs fed PC. Pigs fed EO100 showed smaller (p<0.05) mean corpuscular volume (MCV) than pigs fed EO400. Starter II pigs fed EO400 had (p<0.05) higher MCV and lower mean corpuscular hemoglobin and erythrocytes than those fed EO100. There was a higher concentration (p<0.05) of band cells for PC, similar to EO400 and EO200. Performance-enhancing antibiotic and EOB to diets increased (p<0.05) liver superoxide dismutase activity. Conclusion: Adding 200 and 400 mg EOB/kg feed decreased DO and was advantageous to hematological and blood biochemical profile and liver antioxidant status without being detrimental to growth performance and gastrointestinal health in nursery pigs.
Objectives: to analyze burden predictors in mental health workers during the COVID-19 pandemic. Methods: a quantitative study, collected between October and December 2020 through a sociodemographic questionnaire and Mental Health Service Burden Assessment Scale, in four services in a municipality in the state of São Paulo, Brazil, with 108 workers. Descriptive analysis and multiple linear regression of ordinary least squares were performed, in search of predictors for variation in the scale score. Results: it showed median work burden (2.03). Predictors: psychological or psychiatric follow-up; normal performance of activities during the pandemic; direct action with suspected or confirmed cases of COVID-19; and belonging to the risk group (people over 60 years of age, diabetics, hypertensive, cardiac, respiratory problems) (p<0.05). Conclusions: working conditions observed during the pandemic, simultaneously with workers' mental health care needs predict burden at work in health.
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2,121 members
Rose Meire Costa Brancalhão
  • Centro de Ciências Biológicas e da Saúde
Cleide Viviane Buzanello-Martins
  • Centro de Engenharias e Ciências Exatas
Silvia Renata Machado Coelho
  • Centro de Ciências Exatas e Tecnológicas (CCET)
Eriton Egidio lisboa Valente
  • Centro de Ciências Agrárias
Rua Universitária, 1.619, 85819-110, Cascavel, Paraná, Brazil
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Universidade Estadual do Oeste do Paraná
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