Artigo em periódico indexado (CNPDIA) https://www.alice.cnptia.embrapa.br/alice/handle/item/205 2026-07-02T16:36:09Z 2026-07-02T16:36:09Z FACURE, M. H. M. BI, L. ZHANG, T. MERCANTE, L. A. GOGOTSI, Y. CORREA, D. S. https://www.alice.cnptia.embrapa.br/alice/handle/doc/1187862 2026-06-28T12:38:05Z 2026-01-01T00:00:00Z

Título: MXene-Modified Fiber-Based Electronic Tongue for Sensitive Detection of Antibiotic Residues in Milk. Autoria: FACURE, M. H. M.; BI, L.; ZHANG, T.; MERCANTE, L. A.; GOGOTSI, Y.; CORREA, D. S. Conteúdo: The widespread use of antibiotics has raised concerns about their residues in dairy products, meat, fish, and poultry, which can pose risks to human health and lead to substantial economic losses. Therefore, the rapid, sensitive, and cost-effective detection of low concentrations of various antibiotics in food samples is critical. This work reports on the fabrication of MXene fibers by coating commercial nylon yarns with Ti3C2, Ti3C1.75N0.25, and Ti3C1.5N0.5 MXenes and their use as electrodes in an impedimetric electronic tongue (e-tongue). The MXenemodified fiber-based e-tongue was employed in the detection of trace amounts of cloxacillin benzathine, tetracycline hydrochloride, and streptomycin sulfate. By treating the collected electrical resistance data, the system could differentiate the antibiotics and detect their presence in real milk samples at concentrations as low as 10 nM. The use of low-cost MXene-modified nylon fibers as electrodes, which can be fabricated through rapid and straightforward methods, enhances the scalability and practicability of the etongue system. This approach represents a promising and robust alternative for the sensitive detection of diverse antibiotic residues in food matrices.

2026-01-01T00:00:00Z TOMAZ, A. R. LAL, R. SILVA, W. R. da INAGAKI, T. M. https://www.alice.cnptia.embrapa.br/alice/handle/doc/1187867 2026-06-28T12:38:02Z 2026-01-01T00:00:00Z

Título: Improving soil carbon in semiarid agroecosystems: reclaimed water and mulch effects in cactus-sorghum intercropping. Autoria: TOMAZ, A. R.; LAL, R.; SILVA, W. R. da; INAGAKI, T. M. Conteúdo: In semiarid regions, soil organic carbon (SOC) stocks and soil organic matter (SOM) pools are often low due to limited biomass input and inadequate management. This study evaluated SOC stocks and SOM fractions in a forage cactus–sorghum intercropping system irrigated with treated sewage water under diverse mulch in the northeastern Brazilian semiarid. The experiment followed a randomized split-plot block design with four rep licates. Main plots included four irrigation levels (0, 80, 100, and 120 % of sorghum evapotranspiration (ETc)), and split plots comprised two mulch treatments: no mulch (NM) and mulch (WM) with 8 Mg ha 1 of sabi grass, spiny burrgrass, and goosegrass. Soil samples were collected at 0–0.10, 0.10–0.20, and 0.20–0.40 m depths in three sorghum cuts to determine labile SOM fractions: hot water-extractable C (HWEO-C), potassium permanganate-oxidizable C (POX-C), and particulate organic C (POC). In addition, SOC stocks and humic sub stances (HS), including humin (HU), fulvic acid (FA), and humic acid (HA), were determined at the end of the experiment. Intercropping system productivity was also evaluated. The highest SOC, POC, POX-C, and HWEO-C stocks occurred in 80WM and 100WM treatments, especially in HS, with HU as the dominant component. SOC in the HU fraction exceeded that in native vegetation soils, with threefold increases at 0–0.10 m and six-to sevenfold increases in deeper layers. Soils without irrigation, regardless of mulch, exhibited lower C storage, underscoring the importance of water management. Combining reclaimed water irrigation and mulching enhanced SOC accumulation, particularly in stable humic fractions, boosted carbon sequestration and crop productivity, and fostered sustainable, climate-resilient agriculture in semiarid tropical regions.

2026-01-01T00:00:00Z SOARES, A. K. M. RODRIGUES, V. G. S. CRESTANA, S. FERREIRA, R. R. M. https://www.alice.cnptia.embrapa.br/alice/handle/doc/1187799 2026-06-28T12:37:13Z 2026-01-01T00:00:00Z

Título: Gullies inventory based on Google Earth PRO anaglyph images from Conceição da Barra de Minas, Minas Gerais, Brazil. Autoria: SOARES, A. K. M.; RODRIGUES, V. G. S.; CRESTANA, S.; FERREIRA, R. R. M. Conteúdo: Gullies are erosive features developed through water erosion processes, which combine runoff and subsurface water flow, which can mobilize great volumes of soil and cause severe impacts to both rural and urban areas. The south of Minas Gerais (Brazil) has been affected by soil degradation due to gullying, especially in Nazareno and Conceição da Barra de Minas. It is essential to assess the already eroded areas to obtain information on environ mental conditions and deflagrant agents that dominate in the study area. Considering the lack of data in Conceição da Barra de Minas and the inexistence of a gully inventory in this municipality, we used anaglyphs of satellite images from 2023 and 2024 to identify and delimit gullies in 103 cells of 2,000 x 2,000 meters, which were compared with hypsometry, slope, geology, soils, watershed, and land use and land cover maps. The inventory identified 238 gullies, with an area of 727.63 ha. Most gullies were concentrated in the south of the study area, especially in the Palmital stream watershed. These features are situated in altimetric ranges between 940 and over 1,000 meters, occurring on slopes varying from 3 – 8% to 20 – 45%. The gullies are primarily associated with lithologies of the Cassiterita orthogneiss, Represa de Camargos metagranodiorite, and the Nazareno Formation. They develop within Cambisols and red-yellow Oxisols, often near to water springs, and are spatially correlated with regions used for temporary agriculture and pasture activities. These new insights provide tools to both avoid and recover eroded areas in Conceição da Barra de Minas.

2026-01-01T00:00:00Z MACHADO, R. G. TEODORO, K. B. R. RODRIGUES-FILHO, E. SILVA, E. O. CORREA, D. S. MERCANTE, L. A. https://www.alice.cnptia.embrapa.br/alice/handle/doc/1187797 2026-06-28T12:37:12Z 2026-01-01T00:00:00Z

Título: Cellulose−Alginate Biohybrid Cryogels for Efficient Methyl Orange Dye Removal. Autoria: MACHADO, R. G.; TEODORO, K. B. R.; RODRIGUES-FILHO, E.; SILVA, E. O.; CORREA, D. S.; MERCANTE, L. A. Conteúdo: The uncontrolled discharge of synthetic dyes into aquatic environments poses severe environmental and public health risks due to their high stability, persistence, and toxicity. Moreover, most existing treatment technologies are inefficient, costly, or unsustainable for recalcitrant dyes, particularly azo dyes, underscoring the need for innovative materials that can enhance remediation performance. In this context, the development of sustainable, polymer-based materials that integrate physical adsorption with biological degradation properties represents a promising strategy. Herein, we report a sustainable biohybrid platform based on the immobilization of Cunninghamella elegans within a cellulose microfibril/sodium alginate cryogel. The bioengineered cryogel scaffold exhibits high porosity, structural stability, and enhanced mass−transfer properties, enabling efficient nutrient diffusion and fungal viability within the polymer matrix. The resulting biohybrid system achieved complete removal of methyl orange (5−20 ppm) from water samples, outperforming free fungal cells and displaying enhanced apparent kinetic constants at elevated dye concentrations. Control experiments confirmed the intrinsic adsorption contribution of the polymeric matrix, while UHPLC−ESI−MS/MS analysis identified the main biotransformation products consistent with fungal reductive amination pathways. Recyclability assays demonstrated sustained removal efficiencies above 90% over multiple cycles, highlighting operational robustness. These findings demonstrate that cellulose/ alginate cryogels provide a recyclable, high-performance, and environmentally friendly support for microbial immobilization, offering a promising polymer-based strategy for sustainable dye remediation in water treatment systems.

2026-01-01T00:00:00Z