Article
Environmental Sciences
Sara Ramos dos Santos, Judith Schellekens, Wilson Tadeu Lopes da Silva, Peter Buurman, Alexys Giorgia Friol Boim, Pablo Vidal-Torrado
Summary: The interaction between dissolved organic matter (DOM) and soil matrix is crucial for its sorption, and the retention during the podzolization process shows selectivity towards the molecular composition of DOM. DOM is mainly associated with biopolymers and low molecular weight pyrolysis products, while macromolecular materials such as cellulose are selectively retained. The desorption process significantly affects the composition of leachates.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Geosciences, Multidisciplinary
Pavel A. Ryazantsev, Alfred E. Hartemink, Olga N. Bakhmet
Summary: This study used ground-penetrating radar (GPR) to investigate the spatial variation of boreal forest soils and discuss the correlations between soil attributes and GPR data. The findings suggest that GPR can be a valuable tool for predicting the state and scope of sandy forest soils and has potential implications for forest soil mapping.
Article
Geosciences, Multidisciplinary
Kazumichi Fujii, Tohru Ohmiya
Summary: Research found that in clayey soils, a combination of low pH and reducing conditions can lead to increased loss of iron oxides, forming impermeable E horizons.
Article
Environmental Sciences
Nicolas Francos, Yaron Ogen, Eyal Ben-Dor
Summary: This study evaluated the limitations of using spectral-based models with a generic approach to assess soil organic matter (SOM) content of different origins. The generic approach was found to have limitations for assessing low amounts of SOM (<0.6%), even under controlled conditions. Caution is advised when different SOM sources are present in the examined population, as some sources are more difficult to monitor than others.
Article
Soil Science
Livia Urbanski, Karsten Kalbitz, Janet Rethemeyer, Peter Schad, Ingrid Koegel-Knabner
Summary: This study focuses on the high organic carbon accumulation in sandy agricultural soils, specifically Plaggic Anthrosols, and finds that these soils have similar levels of OC concentration, radiocarbon ages, and organic matter composition compared to reference soils. It also reveals that a significant portion of soil OC is contained within the <=20 μm fraction, despite its low mass proportion. These findings indicate the presence of specific processes for organic matter accumulation in sandy agricultural soils.
Article
Soil Science
Jolanda E. Reusser, Alessandro Piccolo, Giovanni Vinci, Claudia Savarese, Silvana Cangemi, Vincenza Cozzolino, Rene Verel, Emmanuel Frossard, Timothy I. McLaren
Summary: We investigated the composition of organic phosphorus (Porg) in different soil organic matter (SOM) fractions using sequential chemical fractionation (SCF) procedure combined with nuclear magnetic resonance (NMR) spectroscopy. The SCF procedure extracted a higher amount of Porg compared to a single-step extraction. Approximately 38% of the extracted Porg was in the form of unresolved Porg pool, represented by broad signals in the phosphomonoester region of NMR spectra. The SCF revealed the recovery of phosphomonoesters in different SOM fractions, with a portion closely associated with the soil mineral phase. The extractability of inositol phosphates (IP) was also increased using the SCF procedure.
Article
Soil Science
Rafael S. Santos, Martin Wiesmeier, Dener M. S. Oliveira, Jorge L. Locatelli, Matheus S. C. Barreto, Jose A. M. Dematte, Carlos E. P. Cerri
Summary: The study found that land-use change had a stronger impact on the quality of water-extractable organic matter (WEOM) than its quantity, with agricultural areas showing more biochemical changes in WEOM than areas with native vegetation.
Article
Environmental Sciences
Theodora Angelopoulou, Sabine Chabrillat, Stefano Pignatti, Robert Milewski, Konstantinos Karyotis, Maximilian Brell, Thomas Ruhtz, Dionysis Bochtis, George Zalidis
Summary: Remote sensing and soil spectroscopy techniques are valuable for estimating soil properties. This study validated the performance of laboratory and imaging spectroscopy sensors in estimating soil organic matter and calcium carbonate content. The results demonstrate the potential of using these techniques for quantitative predictions of soil properties at larger scales.
Article
Environmental Sciences
Guoxiang Niu, Gege Yin, Xiaohan Mo, Qinggong Mao, Jiangming Mo, Junjian Wang, Xiankai Lu
Summary: This study investigates the impact of long-term nitrogen (N) inputs on soil dissolved organic matter (DOM) composition. The results demonstrate that N additions significantly alter DOM characteristics and increase recalcitrant DOM components, which benefits soil organic carbon (SOC) storage.
ENVIRONMENTAL RESEARCH LETTERS
(2022)
Article
Green & Sustainable Science & Technology
Qiang Shen, Shiwen Zhang, Ke Xia
Summary: This study explores the spectral heterogeneity of soil types and soil organic matter content using hyperspectral technology and proposes a method for measuring soil organic matter content in large areas. The results show significant regional variations in factors affecting soil spectral absorption peaks. The first-order differential partial-least-squares method provides the best prediction for soil organic matter inversion.
Article
Environmental Sciences
Meihua Yang, Songchao Chen, Xi Guo, Zhou Shi, Xiaomin Zhao
Summary: Robust soil organic matter (SOM) mapping is necessary for farms; however, it is cost prohibitive to chemically analyze a large number of samples. Recent research has shown that visible and near-infrared (vis-NIR) reflectance spectroscopy can accurately estimate SOM in a cost-effective manner. This study aimed to compare the mapping accuracy with and without the use of vis-NIR spectroscopy as a covariate. Results indicated that adding vis-NIR spectra as covariates significantly improved the map accuracy, providing a cost-efficient technique for fine-resolution spatial mapping of soil information.
Article
Geochemistry & Geophysics
Chunmei Chen, Aaron Thompson
Summary: Organic matter retards Fe(II) oxidation rates, while pre-existing Fe (oxyhydr)oxides play a significant role in catalyzing Fe(II) oxidation. Non-extractable soil minerals after removing Fe (oxyhydr)oxides have only a minor effect on oxidation rates.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Article
Environmental Sciences
Michael P. Schmidt, Steven D. Siciliano, Derek Peak
Summary: This study investigated the interaction between boric acid and a polyphenolic SOM analogue, tannic acid, at varying concentrations under different pH conditions. The results showed that boric acid enhanced the deprotonation of tannic acid at pH = 7 and 9, leading to an increasing binding affinity between boric acid and tannic acid from pH = 5 to 9.
Article
Agronomy
Dmitry S. Volkov, Olga B. Rogova, Mikhail A. Proskurnin
Summary: This study compared the qualitative analysis abilities of photoacoustic, diffuse reflectance, and attenuated total reflection FTIR modalities on silicate soil samples under the same conditions. It was found that DRIFT provided the most bands, ATR-FTIR showed good sensitivity for soil water and matrix, and FTIR-PAS was most sensitive to absorption bands not seen in DRIFT or ATR-IR spectra.
Article
Biodiversity Conservation
Elaine Mitchell, Clemens Scheer, David Rowlings, Francesca Cotrufo, Richard T. Conant, Peter Grace
Summary: Over 10% of Australia's grasslands are considered degraded, leading to interest in managing these ecosystems to increase soil carbon sequestration. Climate is a key factor affecting residue mass loss and the formation of particulate organic matter and mineral-associated organic matter, highlighting the need for targeted grassland restoration methods.
GLOBAL CHANGE BIOLOGY
(2021)
Article
Soil Science
Amanda M. Tadini, Ladislau Martin-Neto, Aleksandar Goranov, Debora M. B. P. Milori, Alberto C. C. Bernardi, Patricia P. A. Oliveira, Jose R. M. Pezzopane, Luiz A. Colnago, Patrick G. Hatcher
Summary: This study evaluated carbon accumulation in soils from integrated agricultural systems, showing that with increasing depth of soil horizons, carbon becomes enriched. Integrated agricultural systems enhance carbon enrichment in soil organic matter and humic acids, promoting long-term carbon storage.
EUROPEAN JOURNAL OF SOIL SCIENCE
(2022)
Review
Physics, Multidisciplinary
Tiago Bueno Moraes, Luiz Alberto Colnago
Summary: In the past two decades, noninvasive physical methods based on electromagnetic radiation have been developed to evaluate food quality. Nuclear magnetic resonance (NMR), which does not use ionizing radiation and is not strongly attenuated by food or package composition, can be used for noninvasive analysis of intact and packaged foods. However, high-resolution NMR instruments are expensive and bulky, limiting their practical application. Therefore, low-cost, low-field, time-domain NMR instruments (TD-NMR) have been used for noninvasive analysis of intact food.
BRAZILIAN JOURNAL OF PHYSICS
(2022)
Article
Geosciences, Multidisciplinary
Gabriel Ramatis Pugliese Andrade, Javier Cuadros, Jorge Marcos Peniche Barbosa, Pablo Vidal-Torrado
Summary: Clay minerals play a crucial role in controlling the fractionation of Rare Earth Elements (REE) in tropical mangroves, with higher kaolinite content leading to greater REE fractionation, while higher proportions of Fe-rich smectite result in lower REE fractionation.
Article
Geography, Physical
Pedro Martinez, Lucas C. R. Silva, Marcia Regina Calegari, Plinio Barbosa de Camargo, Pablo Vidal-Torrado, Markus Kleber
Summary: Umbric ferralsols have exceptional organic carbon stocks, largely due to increased thickness of A horizons possibly resulting from unique vegetation cover and geomorphic processes. The highest carbon stocks are found in the transition zone between savanna and rainforest.
EARTH SURFACE PROCESSES AND LANDFORMS
(2022)
Article
Chemistry, Multidisciplinary
Rosilene A. Prestes, Luiz A. Colnago, Emanuel Carrilho, Nelson R. Antoniosi Filho, Maria Isabel R. Alves
Summary: This article examines the effects of Citrus sudden death (CSD) on the fatty acid composition and presents an alternative method of diagnosing CSD using fatty acid profiles.
JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY
(2022)
Article
Environmental Sciences
Edvaldo Renner Costa Cardoso, Vander Freitas Melo, Josiane M. L. Mazzetto, Pablo Vidal-Torrado, Ricardo Otto Oliveira, Bruna Ramalho, Eloana Janice Bonfleur
Summary: Organic soils play an important role as filters for organic and inorganic pollutants. This study determines the functional groups of soil organic matter that contribute most to the adsorption of Pb2+ and H2AsO4- in Histosols.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2022)
Article
Soil Science
Ingrid Horak-Terra, Rosalia Nazareth Rosa Trindade, Fabricio da Silva Terra, Alexandre Christofaro Silva, Plinio Barbosa de Camargo, Carolina Batista de Oliveira Viana, Pablo Vidal-Torrado
Summary: This paper presents a study on the stratigraphy and properties of a deep soil core from a vereda in Brazil. The research provides insight into the formation and environmental changes of the vereda, as well as the potential for studying climate changes since the late Pleistocene. The results highlight the importance of protecting these complex ecosystems for further research.
Article
Environmental Sciences
Sara Ramos dos Santos, Judith Schellekens, Wilson Tadeu Lopes da Silva, Peter Buurman, Alexys Giorgia Friol Boim, Pablo Vidal-Torrado
Summary: The interaction between dissolved organic matter (DOM) and soil matrix is crucial for its sorption, and the retention during the podzolization process shows selectivity towards the molecular composition of DOM. DOM is mainly associated with biopolymers and low molecular weight pyrolysis products, while macromolecular materials such as cellulose are selectively retained. The desorption process significantly affects the composition of leachates.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Materials Science, Multidisciplinary
Gustavo Nicolodelli, Rondinelli D. Herculano, Bruno S. Marangoni, Matheus C. S. Ribeiro, Debora M. B. P. Milori, Carlos R. Menegatti
Summary: The study focuses on using laser-induced breakdown spectroscopy (LIPS) for elemental characterization and differentiation of biomaterials. Analysis of elements such as C, Fe, Mg, Ca revealed that H and N are the main factors distinguishing between samples. By using the Weighted K-Nearest Neighbor algorithm, collagen latex biomembrane can be differentiated from non-collagen samples with high accuracy of 94.44%.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Biochemistry & Molecular Biology
Luiz Alberto Colnago, Luis E. Rodriquez-Saona, Zeev Wiesman
Article
Materials Science, Multidisciplinary
Willian R. Caliman, Franciani C. Sentanin, Rodrigo C. Sabadini, Rodrigo H. S. Garcia, Tatiana Monaretto, Luiz A. Colnago, Agnieszka Pawlicka
Summary: This paper investigates nanocomposite polymer electrolytes (SPEs) consisting of montmorillonite (MMT; Na+SYN-1) and gellan gum. The characteristics of the membrane samples were analyzed using ATR-FTIR, TD-NMR, and SEM. The results showed an interaction between gellan gum and Na+SYN-1, as well as a more homogeneous surface in the nanocomposite with 40 wt.% Na+SYN-1. The application of NPEs in small electrochromic devices (ECDs) exhibited a decrease in peaks and charge density.
Article
Geosciences, Multidisciplinary
Mariane Chiapini, Judith Schellekens, Jairo Calderari Oliveira, Marcia Regina Calegari, Pablo Vidal-Torrado
Summary: Ten complete soil profiles from three different areas in southern Brazil were studied to improve the understanding of Ferralsol pedogenesis. The study found that Ferralsols mainly form in the 2 m control section, but other records exist at greater depths. The detailed analysis from the topsoil to the weathering front provided a hierarchical interpretation of pedogenesis and demonstrated spatial variation of properties.
Article
Biochemistry & Molecular Biology
Daniel H. Lysak, Marco Grisi, Kathryn Marable, Gaurasundar M. Conley, Carl A. Michal, Vincent Moxley-Paquette, William W. Wolff, Katelyn Downey, Flavio V. C. Kock, Peter M. Costa, Kiera Ronda, Tiago B. Moraes, Katrina Steiner, Luiz A. Colnago, Andre J. Simpson
Summary: With the superior mass sensitivity offered by micro-coils, they are an excellent choice for studying tiny, mass limited samples such as eggs and small organisms. The recent development of CMOS-based micro-coil transceivers has shown great potential in achieving excellent mass sensitivity. This study explores the ability of broadband CMOS micro-coils to study heteronuclei in the context of environmental research, demonstrating promising results in terms of detection limits and successful analysis of environmentally relevant samples.
Article
Polymer Science
Tatiana Santana Ribeiro, Juliana Aparecida Scramin, Jose Avelino Santos Rodrigues, Rubens Bernardes Filho, Luiz Alberto Colnago, Lucimara Aparecida Forato
Summary: This study determined the secondary structure content of Kafirins in Sweet Sorghum BR501 grains using C-13 solid-state NMR spectroscopy. It was found that the reduced Kafirins had a higher percentage of alpha-helix structure (56%) compared to beta-sheet structure (40%), while the unreduced Kafirins had a higher percentage of alpha-helix structure (59%) compared to beta-sheet structure (12%). The results obtained through Singular Value Decomposition (SVD) method also showed similar trends, indicating that it is a reliable method for quantifying the secondary structure of insoluble proteins.
POLIMEROS-CIENCIA E TECNOLOGIA
(2022)
Article
Soil Science
Ingrid Horak-Terra, Fabricio da Silva Terra, Adrieny Kerollen Alves Lopes, Leonardo Barros Dobbss, Ademir Fontana, Alexandre Christofaro Silva, Pablo Vidal-Torrado
Summary: Brazilian palm swamps, known as veredas, play a fundamental role in the hydrological balance of the Brazilian savanna. This study highlights the negative impacts of anthropization on the soil processes and properties of a vereda in an agricultural area, including a significant reduction in organic carbon and negative effects on water holding capacity. The findings emphasize the importance of protecting and preserving these fragile ecosystems for their valuable ecosystem services.
REVISTA BRASILEIRA DE CIENCIA DO SOLO
(2022)