JOURNAL OF BIOENGINEERING, TECHNOLOGIES AND HEALTH

Freeze-Dried Cambuí Fruit (Myrciaria tenella O. Berg): Physicochemical Characterization, Bioactive Potential, and Technological Prospecting

Rosália Sobral Costa Neta — 2025-12-01

This study investigated the physicochemical properties, bioactive potential, and technological prospects of freeze-dried cambuí fruit (Myrciaria tenella O. Berg), a little-explored native Brazilian species. Analyses of pH, titratable acidity, moisture, lipids, total phenolic compounds, flavonoids, and antioxidant activity were performed on different methanolic and ethanolic extracts. The results revealed high levels of phenolic compounds and flavonoids, particularly in 60% solvent extracts, along with significant antioxidant activity, highlighting the fruit's functional potential. Low pH and intermediate moisture contributed to the stability of bioactive compounds, while the high lipid content favored efficient extraction. Technological prospection indicated that cambuí remains underexplored in patents and scientific research, revealing opportunities for innovation in food, pharmaceutical, and nutraceutical products. These findings underscore the importance of sustainably utilizing Brazilian biodiversity and provide a foundation for the development of new technologies based on cambuí.

Influence of Carnauba Wax on the Physical and Mechanical Properties of PBS/PLA/Vegetable Fibers Blend Composites

Talyta Silva Prado — 2025-12-01

Polymeric composites with vegetable fibers have attracted academic and industrial attention due to their ease of obtaining, combination of intrinsic properties, and environmental concerns. PBS/PLA blends reinforced with vegetable fibers from the coffee industry enhance sustainability and circular-economy characteristics. To increase the hydrophobicity and surface quality of polymer composites, carnauba wax proved an excellent alternative, given its organic nature, versatility, and compatibility with biopolymers. Therefore, this study had the objective to evaluate the influence of wax addition on the physical and mechanical wettability properties of PBS/PLA/vegetable fiber blend composites. The presence of wax in the 40% vegetable fiber formulation improved fiber cohesion and distribution, resulting in greater flexibility. Furthermore, in both formulations containing wax, an improvement in the contact angle was observed, with only the one containing 40% fiber reaching an angle greater than 90°, characteristic of hydrophobic materials, corroborating the theory of the wax's plasticizing action in this formulation.

3D Vision Accessibility: the Product Development Process

Antônia Larissa Reis Barbosa — 2025-12-01

Research indicates a significant increase in the use of prescription glasses worldwide. Along with this trend, there is an increasing interest in 3D movies (stereoscopic cinema) in the film industry. This requires an image overlay system associated with the use of specific glasses (3D glasses). However, the challenge faced by consumers who already wear prescription glasses is their use in conjunction with 3D glasses. Therefore, the purpose of this work is to describe the Product Development Process (PDP) and its application in developing a solution that enhances the immersive experience, providing greater comfort to users of prescription glasses while watching 3D movies.

Development of a Method for Conducting Short-Circuit Test Under UN38.3 Standard for Batteries Composed of Primery Lithium Metal Cells

Ruan Sávio Ferreira Zeferino — 2025-12-01

Lithium batteries have been utilized in a wide range of applications, from land vehicles and aircraft to isolated systems such as underwater equipment and space satellites, where autonomy is a crucial factor. However, these batteries pose significant risks in cases of external damage, malfunction, or exposure to environments that interfere with their internal chemical reactions. This has led to the creation of specific standards to regulate their transport and storage. Therefore, this work proposes a methodology for conducting a short-circuit test, a component of the certification process for the UN38.3 standard on the safe transportation of lithium batteries.

Analysis of Maximum Stress due to Bending in Helical Gears: Comparison Between the Agma Method and Finite Element Analysis

Hebert Tairone dos Santos Silva — 2025-12-01

This study presents a methodology for designing helical gears based on Shigley's calculation approach and AGMA standards, including the calculation of maximum bending stresses and the application of safety factors. The analytical results were compared with numerical results obtained from a structural analysis using the Finite Element Method (FEM), applying the von Mises yield initiation failure criterion. The methodology involved defining geometric and operational parameters, calculating the tangential load, and considering overload factors to achieve more realistic simulations. The maximum stress obtained from the finite element analysis showed a 3.85% difference relative to the analytical calculation from the AGMA standard, demonstrating good agreement between the methodologies.

Sulfur Enrichment in Biodiesel Precipitates: Possible Causes and Impacts

Laura Maria Mota do Rio Bamar — 2025-12-01

Biodiesel is widely used as an additive to fossil diesel because it is a renewable and biodegradable biofuel that reduces pollutant emissions. Although considered a clean fuel, concerns persist regarding its use due to its tendency to form precipitates that can damage automotive components. Therefore, like any other fuel, biodiesel must meet a series of specifications to ensure its quality for commercialization. One such specification is the maximum sulfur content, as this element is a significant contributor to the greenhouse effect, as well as to corrosion in equipment and damage to automotive engines. Thus, this study aimed to analyze the sulfur concentration in biodiesel samples using the ICP-OES technique. The results showed that the precipitate samples had a higher sulfur content than their respective supernatant samples.

Calibration of a Distributed Temperature Sensor in Optical Fiber Based on OFDR

Leonardo Santos Magalhães — 2025-12-01

Optical Frequency Domain Reflectometry (OFDR) is a distributed sensing technique that uses a laser to sweep the frequency of light and record the backscattered signal along an optical fiber. Equipment such as the ODISI 6101 by LUNA employs this method for strain and temperature measurement. The present work aims to present a calibration method for an optical fiber distributed temperature sensor based on OFDR, through experimental bench tests, resulting in an equation describing the relationship between temperature and spectral shift for temperature measurement.

Evaluation of Corrosion in a Glycerin-Based Fluid System

Ruza Gabriela Medeiros de Araújo Macedo — 2025-12-01

The challenges in oil exploration and production in increasingly deep reservoirs require the development of technologies capable of overcoming harsh environmental conditions, such as high temperatures and pressures. A necessary stage before financial investments in new technologies is the execution of laboratory-scale tests to simulate the operational conditions to which systems will be subjected. In this context, this work aims to evaluate the inhibitory power of a glycerin-based fluid system. The results obtained so far show a corrosion rate of 0.038 mm/year for the fluid without glycerin and 0.0019 mm/year with glycerin. Therefore, glycerin contributes to a lower corrosion rate, making it favorable for use in such systems.

The Use of Computational Tools in Criminal Proceedings in Brazil: A Proposal for a Technological Model to Contribute to the Speed-Up of Cases Involving Persons Imprisoned Without Final Conviction

Abdon Campos dos Santos — 2025-12-01

Brazil's National Council of Justice (CNJ) records qualitative data regarding procedural slowness. Meanwhile, the National Penitentiary Department System (SISDEPEN) provides quantitative data on the incarcerated population in Brazil. An analysis of the use of computational tools that could contribute to expediting proceedings for imprisoned persons may open new approaches and contributions applicable to judicial processes. The analysis of government and judicial data, combined with a review of the scientific literature, appears promising in the search for tools to assist the judiciary in decision-making, with a particular emphasis on those detained on a provisional basis. In this context, the development of a technological model could analyze millions of cases against specific legal variables and present judges with potential situations eligible for the granting of liberty—whether provisional or otherwise—thus contributing to procedural efficiency.

Proposal for a Prospective Strategic Planning Model for Research Institutes: A Case Study on Innovation Management Within the Health Economic-Industrial Complex

Marcelo Santos Ramos — 2025-12-01

The healthcare industry plays a significant role in national GDP and is heavily invested in frontier technologies. Health innovations are closely tied to the scientific sector, which generates evidence for the development of new drugs, medical equipment, and clinical procedures. However, transforming research outcomes into products has been a persistent bottleneck in Brazil. Given this challenge, the study aims to propose a prospective strategic planning model for managing research, development, and innovation (RDI). This is a case study based on the Design Science Research (DSR) methodology, focusing on the production of an artifact. The study will follow five stages to construct the theoretical framework, assess the state of the art in prospective strategic planning for R&D, conduct content analysis of interviews, and validate the model through a focus group. The expected contribution is to enhance RDI management within the Health Economic-Industrial Complex (HEIC).