Ionospheric scintillation monitoring networks contribute to Global Navigation Satellite System

Composition with (1) a map of Brazil with colored polka dots in different cities; (2) small tables representing each month of the year 2014 and marked with colors; (3) a graphic with the title "Station SJCU (GPS) having elev ≥20"; (4) a graphic with lines that oscillate up and down; and (5) a photo of a cylindrical structure with a triangular top in an open space with grass.

The positioning and air navigation system using Global Navigation Satellite System (GNSS) is affected by ionospheric scintillations. To mitigate these effects, it is necessary to study the characteristics of these scintillations using data generated by scintillation monitor networks, in order to describe the main characteristics of these networks. Read More →

Homeostasis model assessment is negatively associated with the clamp-derived insulin sensitivity index in adolescents

Photo: a hand holding a glucose meter and pointing to a finger of the other hand. In the background, a glucose monitor.

The increase in the prevalence of type 2 diabetes and metabolic syndrome in children and adolescents is a health concern. Therefore, a valid and accessible method of assessing insulin resistance in this age group must be developed to monitor its progression and identifying adolescents at risk of developing associated factors. Read More →

HPV infection may not be responsible for prostate cancer, but it’s better to prevent

Photo of a man lying on a hospital equipment. Two health professionals are beside him. A metal plate is over the man's body.

Since effective vaccines against HPV already exist, understanding the dynamics between papillomavirus and prostate cancer is relevant because it can contribute to the development of strategies for prevention and early diagnosis, although prospective analysis does not clearly demonstrate a relationship. Read More →

Mares vaccinated at the end of pregnancy have a higher number of antibodies against equine pyroplasmosis

Photo: adult horse and baby horse walking in a pasture.

Mares vaccinated in the final third of gestation showed higher specific total vaccine antibodies for immunization against Theileria equi and Streptococcus equi subspecies equi, and the antibodies were also transferred to their foals, which may contribute to a vaccination schedule based on foal age that optimizes control against such diseases. Read More →

Evaluation of genetic resistance to brusone in wheat grown in Brazil

Photo: branches of wheat.

In evaluating the resistance of wheat genotypes to brusone, the updated characterization of the reaction to brusone of brazilian wheat cultivars proves to be an important exploratory milestone in the evaluation of the reaction of wheat genotypes, which can help farmers to choose more resistant cultivars to brusone for their crops. Read More →

Improvements in colonoscopy performance help prevent and treat colorectal cancer

Composition: photo of a person lying down being seen by three health professionals. Blue frame in the upper left corner with the text "Quality indicators in colonoscopy: Observational study in a supplementary health system" and link.

Colonoscopy plays an essential role in detecting and diagnosing lesions and tumors of the colorectal mucosa. The quality of the equipment used, the colonoscopist’s technical knowledge and practical skills interfere directly with the effectiveness of the procedure and an analysis of these indicators may reveal opportunities for positive interventions and the improvement of results. Read More →

Cellular regeneration process with porcine skin does not present risks of immunological rejection

Photo: Piece of pork skin, irregular shape similar to a rectangle, sort of yellowish.

Results of the analyzed protocol indicate the viability of the biomaterial for application in regenerative medicine, reducing incompatibility problems in graft and transplant recipients. Aspect and quality of the material obtained provided positive results in cell culture and proliferation, but the decellularization process still needs optimization to minimize hydrogel cytotoxicity. Read More →

Epidemiology and risk factors of hypoglycemia in type 1 diabetes in Brazil

Photo or composition. A cell phone and a blood glucose meter kit (two cylindrical objects, a round jar and the monitor with two buttons). Solid orange background.

Factors associated with hypoglycemia and severe hypoglycemia (SH) in individuals with type 1 diabetes mellitus (T1D) in Brazil shows that avoiding high doses of basal insulin and educating individuals about alcohol consumption and its consequence on glycemic control are simple measures that can contribute to reducing SH events. Read More →

Dissolution of agrominerals by bioweathering provides nutrients for corn growth

Four microscopic images of biotite, a mineral. In all four images, something that looks like a plate of broken glass at different angles.

Pure and ground samples of biotite schist and biotite syenite proved to be sources of macro- and micronutrients for corn plants. The discovery is relevant for the future guidance of fertilization protocols, correction and soil balance to maximize production through the use of silicate agrominerals as soil remineralizers. Read More →

Optical instrument helps monitor survival rate of patients undergoing liver transplant

Close-up photo of a surgery. One hand holds a cylindrical instrument similar to a thick needle, it has a thread at the top end. Another hand holds a pair of scissors. Both instruments are aimed at an opening in a person's body.

Fluorescence spectroscopy under violet light is a minimally invasive optical technique in liver transplant procedures. It demonstrated effectiveness as a complementary tool for monitoring liver grafts in cold perfusion, providing objective information to support the surgeons’ final decision regarding the use of organs for transplantation. Read More →