A5088855386- Laser-induced spectroscopy and plasma
- Analytical chemistry methods development
- Heavy metals in environment
- Cultural Heritage Materials Analysis
- Spectroscopy and Chemometric Analyses
- Water Quality and Pollution Assessment
- Mercury impact and mitigation studies
- Heavy Metals in Plants
- Geochemistry and Geologic Mapping
- Soil Carbon and Nitrogen Dynamics
- Agricultural and Food Sciences
- Plant-Derived Bioactive Compounds
- Soil Management and Crop Yield
- Tailings Management and Properties
- Atmospheric and Environmental Gas Dynamics
- X-ray Spectroscopy and Fluorescence Analysis
- Diatoms and Algae Research
- Bee Products Chemical Analysis
- Marine and coastal ecosystems
- Phytochemistry Medicinal Plant Applications
- Seed Germination and Physiology
- Soil erosion and sediment transport
- Water Quality Monitoring and Analysis
- Advanced Scientific Techniques and Applications
- Soil Geostatistics and Mapping
Brazilian Agricultural Research Corporation
2020-2023
Universidade de São Paulo
2021-2022
Centre National de la Recherche Scientifique
2021-2022
Institut de Recherche pour le Développement
2021-2022
Université de Toulon
2021-2022
Institut Méditerranéen d’Océanologie
2021-2022
Aix-Marseille Université
2021
Universidade Estadual Paulista (Unesp)
2017-2020
Abstract Effective verification of soil organic carbon (SOC) improvement interventions through sequestration (SCS) requires robust methodologies to measure, report, and verify changes in (C) levels. Furthermore, C must be monitored over time ensure that sequestered is not being re-emitted, thus ensuring the permanence removals. The traditional methods for measurement are time-consuming, labor-intensive, energy-intensive, increasing analysis costs. In this article, we use a commercially...
Brachiaria brizantha is the most common forage plant used in cattle pastures. The field population main parameter for nutrition; it mainly determined by genotype and physiological quality of seed, that is, seed vigor. Seed vigor standard tests are considered time-consuming laborious. Fourier transformed infrared (FTIR) spectroscopy was to classify cultivar from two different genotypes B. brizantha, namely, Marandu Paiaguás cultivars. Two batches each group were classification applying FTIR...
Total phosphorus (TP) in sediments is an important chemical variable the study of extent eutrophication water bodies. Two methods, based on single pulse (SP) and double (DP) laser-induced breakdown spectroscopy (LIBS), were developed for determining TP sediment cores Brazilian rivers upstream from Barra Bonita reservoir. concentration was determined by inductively coupled plasma optical emission spectrometry (ICP OES) digested samples. Besides, a LIBS system operating SP DP modes used to...
This study aims to develop a single calibration model determine nutrient elements directly (Ca, Mg, Mn, and P) in soybean sugar cane leaf samples by double pulse laser-induced breakdown spectroscopy (DP LIBS).
Soil carbon (C) determinations have been widely studied due to soil C sequestration that contributes the mitigation of greenhouse gas emissions and improves quality.
The correct choice of the calibration strategy method is a step that can ensure accuracy carbon determination in soils by laser-induced breakdown spectroscopy. In this paper, we evaluate and discuss intrinsic characteristics univariate multivariate strategies overcoming soil matrix effects their influence on magnitude prediction error values. matrix-matching with previous correction Al spectral interference C I line at 193.03 nm was best 13 models evaluated [root-mean-square...
Laser-induced breakdown spectroscopy (LIBS) associated with machine learning algorithms (ML) was used to evaluate the Brachiaria seed physiological quality by discriminating high and low vigor seeds. A 23 factorial design optimize LIBS experimental parameters for spectral analysis. total of 120 samples from two distinct cultivars brizantha seeds exhibiting (HV) (LV) in standard tests were studied. The raw spectra normalized submitted outlier verification, previously reduction data...
Limited sensitivities of some laser-induced breakdown spectroscopy (LIBS) instruments may impair applications. Although this drawback can be minimized by instrumental improvements, the complexity operations and cost increases. In work principle conventional dry ashing for sample preparation was evaluated as a simple low-cost alternative to improve sensitivity LIBS analysis. Botanical, agronomic industrial samples were analyzed. Samples heated their emission signals evaluated. The results...
The rapid determination of the soil fertility is important to improve agricultural production and reduce environmental impacts. With a new concept precision agriculture digital agriculture, demands have been generated using sensors, methods, protocols analysis time production. In this context multivariate calibration models (multiple linear regression) were calculated for indirect prediction eight parameters fertility, pH (H2O CaCl2 extractors), cation exchange capacity, sum bases, base...
<p>Organic matter makes up less than 5% of soil and sediment is often linked to the particulate mineral fraction, forming an organo-mineral microsystem that certainly contributes its stability in natural environment. However, most techniques used study quantify organic necessarily require separation phase from by chemical or physical extraction and, subsequently fractionation methods destroy and/or degrade original aggregate morphological structure. The present work...
<p><span>The sediments are complex and heterogeneous environments, thus, besides determining the concentration of potentially toxic metals present in sediments, it is necessary to understand sediment's ability accumulate or release contaminants, because many biogeochemical processes involved, influencing fate these metals. The main modes dispersion, which can lead remobilization contaminants (i) early diagenesis, (ii) natural anthropogenic resuspension sediment...
This study aims to develop a single calibration model determine nutrient elements directly (Ca, Mg, Mn, and P) in soybean sugar cane leaves samples by laser-induced breakdown spectroscopy (LIBS). It was evaluated matrix-matching (MMC) using direct inverse models. Forty-five were used build the (23 22 leaves), fifteen for prediction test (8 7 leaves) In model, analyte concentration sample is independent variable, analytical signal dependent variable. general, both models presented...