Sugestão de adubação fosfatada do algodoeiro para o Estado de Goiás

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Turbulence Modeling Insights into Supercritical Nitrogen Mixing Layers

In Liquid Rocket Engines, higher combustion efficiencies come at the cost of the propellants exceeding their critical point conditions and entering the supercritical domain. The term fluid is used because, under these conditions, there is no longer a clear distinction between a liquid and a gas phase. The non-conventional behavior of thermophysical properties makes the modeling of supercritical fluid flows a most challenging task. In the present work, a Reynolds Averaged Navier Stokes (RANS) computational method following an incompressible but variable density approach is devised on which the performance of several turbulence models is compared in conjunction with a high accuracy multi-parameter equation of state. In addition, a suitable methodology to describe transport properties accounting for dense fluid corrections is applied. The results are validated against experimental data, making it clear that there is no trend between turbulence model complexity and the quality of the produced results. For several instances, one- and two-equation turbulence models produce similar results. Finally, considerations about the applicability of the tested turbulence models in supercritical simulations are given based on the results and the structural nature of each model.Aeronautics and Astronautics Research Center (AEROG), Laboratório Associado em Energia, Transportes e Aeronáutica (LAETA) e Fundação para a Ciência e Tecnologia (FCT)info:eu-repo/semantics/publishedVersio

Improving hospital operations management to reduce ineffective medical appointments

The main objective of this study is to meet management aspirations by promoting waste reduction and consequently improving patients` experience in a Portuguese public hospital. These aspirations include increasing hospital service quality in a continuous and efficient way. This management mindset uncovered divergences between medical appointment and magnetic resonance imaging (MRI) exam scheduling that were generating waste for both the hospital and patients. The main aspects considered in this study were the patients’ medical expectations, the quality, and cost of service provided. One-year retroactive encrypted data from medical appointments and MRI requisitions were provided for the algorithm development. Outcomes obtained from the algorithm revealed a high percentage of medical appointments occurring without the respective MRI exam results. These outcomes exposed waste existence that was hitherto unknown by the administration. Thus, the main algorithm function is to analyze future data to previously alert ineffective medical appointments. This progress contributes to reducing wasted medical and patient time. In summary, the main contribution of this article is to allow hospital managers to cross-check data from different sectors to identify divergences in future medical consultations that require exams or results of clinical analysis.This work was supported by the Fundacao para a Ciencia e a Tecnologia [POCI-01-0145-FEDER-030299]; Fundacao para a Ciencia e a Tecnologia [UIDB/00319/2020]

What do women know about testicular cancer? Exploratory study of a female university population

Poster 123 publicado em European Urology Supplements 11 (2012) 191–235.Introduction & Objectives: Testicular cancer (TC) is one of the most common malignancies in young population, and it appears to be increasing worldwide. The cure rate for TC now approaches 100%, but is negatively influenced by the delay in seeking medical attention. Sometimes it’s a man’s partner who spots a change in the testicle. Several publications have showed the importance of the partners in health. There is a lack of evidence about the importance of women, as partners, in the diagnosis of several pathologic processes in men, but we know that the healthy behavior is shaped by the partner. Our objective was to evaluate women’s knowledge about TC, as they can act as educators towards better men’s health. Material & Methods: We performed a survey of 13 questions concerning the awareness of TC and perceived importance of testicular self-examination in 307 women from the university. The questionnaire was sent to the institutional email of students, professors and other workers and the data were collected and then analyzed. Results: The mean age of our group was 26±8.3 years (range 18–58 years). Students were 74.6% (n = 229) of the sample and 25.7% (n = 79) were from the medical course. When asked if they had any knowledge about TC, 89.3% (n = 274) answered they had information about TC. Sixty-four (20.8%) of the participants knew someone with testicular cancer. Only 25% (n = 77) of the women answered correctly to the question about the age group most frequently seen with TC and 57.7% (n = 177) responded properly to the most frequent symptom of testicular cancer. When a paired analysis of the correct answers to the age group of TC and most frequent symptom only 24 (7.8%) of the subjects gave proper responses to every questions. A second part of the questionnaire was about testicular self-examination. Approximately half (50.5%) of the subjects, n = 155, referred knowledge about testicular examination. We used a Lickert-type scale to categorize the perceived importance of this examination from 1 (not important) to 10 (extremely important), with 69.4% (n = 213) considering that this was extremely important (10) and only one participant (0.3%) responded that it wasn’t important. Almost all participants (95.4%) answered that they would advise their male friends to perform testicular self-examination. Conclusions: In this study we have showed a low level of knowledge about TC. Despite this fact, the knowledge about this cancer, a great number of women considered important to men to perform testicular self-examination and were motivated to advise their male friends to perform it. Considering that partners may assume an important role in health promotion and education, maybe women, as the partner of patients in risk of having TC, can be a way of engaging healthy behaviors in men

Rheological and sensorial evaluation of yogurt incorporated with red propolis

The aim of the present study was to evaluate the use of red propolis extract, as a natural additive, in yogurt. For this, yogurt was produced with red propolis extract (YRP), to replace the additive chemical potassium sorbate, used in the commercial yogurt (CY). Analysis for apparent viscosity, texture and sensorial acceptance were performed. Apparent viscosity and texture measurements of the samples were similar to the control. Sensory evaluation showed that the samples of YRP reached a mean score of 9 on the hedonic scale, the same score found for CY. Regarding the purchase intention, the samples of YRP showed a positive intention by 64.45% of the consumers, and for CY, 68.89%. For the taste, texture, aroma and consistency, the scores were in the range from 8 to 10, for both samples. It can be concluded that the yogurt incorporated with red propolis presents potential for its commercialization in the Brazilian market.The authors thank the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES), Brazilian government (Finance Code 001), and Leonardo Fonseca Maciel and Denilson de Jesus Assis of the Pharmacy Faculty of Federal University of Bahia, and the technical team of the INSECTA laboratory from Federal University of Bahia Reconcavo for their support during the research.info:eu-repo/semantics/publishedVersio

Voltammetric determination of sibutramine in beverages and in pharmaceutical formulations

A simple and sensitive method has been proposed for the determination of sibutramine-HCl in energy drinks, green tea and pharmaceutical formulations using differential pulse voltammetry performed on a hanging mercury drop electrode. In the chosen experimental condition (Mcllvaine pH 4.0 buffer, 50 mV pulse amplitude and 40 mV s-1 scan velocity), sibutramine-HCl presented a reversible behavior and a peak maximum at -80 mV. Detection limit was 0.4 mg L-1 and the working linear range extended up to 33.3 mg L-1 (r = 0.99). Analysis of real and fortified samples enabled recoveries between 91 and 102%. The electroanalytical method was compared with a HPLC method which indicated it accuracy