Publications by authors named "Carlos R Menegatti"
In this work, we evaluated the potential application of fluorescence spectroscopy, associated with the canonical polyadic/parallel factor analysis and principal component analysis, to monitor the dissolved organic matter (DOM) generated from a slaughterhouse industry. During the monitoring process, we analyzed the residual water at the entrance and exit sites of the slaughterhouse effluent treatment as well as downstream and upstream the effluent receiving water body of a local river. The results revealed that the fluorescence analysis was able to identify proteins, chlorophylls, and humic substances at the entrance and exit sites of the slaughterhouse treatment plant and humic substances at the river water bodies.
View Article and Find Full Text PDFGold nanoparticles (AuNPs) have shown interesting properties and specific biofunctions, providing benefits and new opportunities for controlled release systems. In this research, we demonstrated the use of natural rubber latex (NRL) from Hevea brasiliensis as a carrier of AuNPs and the antibiotic metronidazole (MET). We prepared AuNP-MET-NRL and characterized by physicochemical, biological and in vitro release assays.
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- Laser-induced breakdown spectroscopy (LIBS) is gaining attention for its ability to quickly identify and measure chemical elements with little sample prep but struggles with sensitivity.
- Researchers developed a homemade continuum wave-diode laser (CW-DL) and combined it with a double pulse LIBS system to enhance lead (Pb) detection in soil samples.
- The combination resulted in a roughly 100% increase in sensitivity for detecting a specific Pb transition, indicating potential for further research into improving LIBS techniques.
Article Synopsis
- Laser-induced breakdown spectroscopy (LIBS) is a fast and effective method for detecting metal contaminants, especially mercury, in urban waste and landfill leachate.
- The study improved LIBS sensitivity by using a double-pulse configuration, making it a better alternative compared to traditional single-pulse setups.
- After normalizing the data to reduce errors, the researchers achieved a high correlation in Hg measurement, establishing a detection limit of 76 mg/kg and demonstrating that the calibration models for quantifying Hg were reliable.
Pullulan is a polymer produced by Aureobasidium pullulans and the main bottleneck for its industrial production is the presence of melanin pigment. In this study, light-emitting diodes (LEDs) of different wavelengths were used to assist the fermentation process aiming to produce low-melanin containing pullulan by wild strain of A. pullulans LB83 with different carbon sources.
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