Located in the city of Maceió, the Federal University of Alagoas (Portuguese: Universidade Federal de Alagoas, UFAL or Ufal) is the major university in coastal state Alagoas and one of the main research centers in Brazilian north eastern region (one of the five regions of Brazil). It is located very near the city's airport..
Tetracycline antibiotics are widely used in cattle to treat and prevent bacterial infections, including enteric and systemic diseases. They are also used to treat bovine mastitis, which affects milk quality and productivity. Improper or excessive use can leave antibiotic residues in animal products, posing a public health risk and promoting antimicrobial resistance. In this study, we examined oxytetracycline (OTC) residues in raw cow’s milk from the semi-arid region of Alagoas, Northeastern Brazil. We used a paper-based microdevice (μPAD) with copper nanoparticles (CuNPs). Milk samples were collected from all four teats of 30 randomly selected Girolando cows across different rural properties. The method performed well, showing a linear response from 1 to 25 μg mL⁻1 and a high correlation coefficient (R2 = 0.99946). The recovery rate was 94.70
This study investigated the energy recovery potential of fruit and vegetable wastes (FVWs) from the Pernambuco Supply and Logistics Center (CEASA-PE) through anaerobic digestion (AD), aiming to increase biomethane production by using different inoculum mixtures and recirculating stabilized liquid biofertilizer (BIO). Combinations of digestate (R3), cattle rumen content (RU), and sewage sludge (SS) were tested using a mixture experimental design based on the simplex-centroid method and response surface methodology, which allowed us to systematically evaluate the interactions between the inocula and identify optimal proportions to produce biomethane. The experiments were conducted in an Automatic Methane Potential Test System (AMPTS II) under mesophilic conditions, with an inoculum-to-substrate ratio of 2:1 on a volatile solids (VS) basis and an organic load of 3.0384 g VS. The combination of 25
Chitin is the second most abundant polysaccharide in nature and constitutes a key structural component in the cell wall of fungi and invertebrate exoskeletons. Chitinases produced by Antarctic organisms have demonstrated high catalytic efficiency, being promising tools for sustainable biotechnological processes. Therefore, the objective of this study was to identify the genes responsible for chitin degradation in the genomes of two Antarctic Arthrobacter strains, as well as to evaluate their biotechnological potential. Whole-genome sequencing followed by phylogenomic analysis revealed that both strains 492 and 285 belong to the species Arthrobacter psychrochitiniphilus. Genome assembly and annotation confirmed the genetic potential for chitinase production, showing that both bacteria possess the gene encoding type C chitinase (Chi C) from the GH18 family. Genomic comparative analysis revealed that they possess a total of eleven genes related to glycoside hydrolases (GH) and carbohydrate-binding modules (CBM), highlighting GH13 and GH65. Arthrobacter psychrochitiniphilus 492 was classified as psychrophilic, while A. psychrochitiniphilus 285 was classified as mesophilic-psychrotolerant. The enzyme production by A. psychrochitiniphilus 285 was 19.9 U/L, in 96 h at 15 °C, and the chitinase showed activity against the Aspergillus sp. series nigri CBMAI 1846, indicating promising potential for the formulation of bioinoculants and sustainable agriculture.
This study aimed to compare the cardiometabolic risk profile between overweight or obese and normal weight and to investigate the influence of overweight and obesity indicators on cardiometabolic risk profile in children and adolescents with congenital heart disease (CHD). A cross-sectional study with 232 children and adolescents with CHD. Cardiometabolic risk profile were evaluated: high-density lipoprotein cholesterol (HDL-c), total cholesterol (TC), low-density lipoprotein cholesterol (LDL-c), non-HDL-c, fasting glucose, triglycerides, high-sensitivity C-reactive protein (hs-CRP), and systolic and diastolic blood pressure (SBP and DBP). Overweight and obesity indicators included body fat percentage (
We report an experimental and theoretical investigation of the propagation of radio-frequency electromagnetic pulses (0.1–50 MHz) along the surface of multiferroic BiFeO3 (BFO) ceramics subjected to oscillating magnetic fields. A pronounced enhancement of the transmitted electromagnetic power is observed, strongly dependent on the magnetic-field configuration, excitation frequency, and propagation geometry. A maximum amplification of approximately 240
