Black-odorous urban water bodies and sediments pose a serious environmental problem. In this study, we conducted microcosm batch experiments to investigate the effect of remediation reagents (magnesium hydroxide and calcium nitrate) on native bacterial communities and their ecological functions in the black-odorous sediment of urban water. The dominant phyla (Proteobacteria, Actinobacteria, Chloroflexi, and Planctomycetes) and classes (Alphaproteobacteria, Betaproteobacteria, and Gammaproteobacteria, Actinobacteria, Anaerolineae, and Planctomycetia) were determined under calcium nitrate and magnesium hydroxide treatments. Functional groups related to aerobic metabolism, including aerobic chemoheterotrophy, dark sulfide oxidation, and correlated dominant genera (Thiobacillus, Lysobacter, Gp16, and Gaiella) became more abundant under calcium nitrate treatment, whereas functional genes potentially involved in dissimilatory sulfate reduction became less abundant. The relative abundance of chloroplasts, fermentation, and correlated genera (Desulfomonile and unclassified Cyanobacteria) decreased under magnesium hydroxide treatment. Overall, these results indicated that calcium nitrate addition improved hypoxia-related reducing conditions in the sediment and promoted aerobic chemoheterotrophy.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9035426 | PMC |
| http://dx.doi.org/10.1007/s00203-022-02871-4 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Foliar application of nitrates limits lead uptake by Cucumis sativus L. plants.
J Trace Elem Med Biol
January 2025
Department of Molecular Plant Physiology, Institute of Environmental Biology, Faculty of Biology, University of Warsaw, Ilji Miecznikowa 1, Warszawa 02-096, Poland.
Lead is a toxic heavy metal, which accumulates in the soil and is readily absorbed by plant roots. The uptake of toxic elements by crops is a serious threat to human health. For this reason, it is important to prevent the incorporation of heavy metals into the food chain.
View Article and Find Full Text PDFStudy of the Thermal Decomposition Process of Explosive Mixtures Based on Hydrogen Peroxide.
Molecules
November 2024
Department of Physical Chemistry and Technology of Polymers, Silesian University of Technology, 44-100 Gliwice, Poland.
In this work, we have investigated the thermal features of hydrogen peroxide-based energetic materials formulations. Initial research has shown that both the auxiliary oxidiser (sodium nitrate, potassium nitrate or calcium nitrate) and sensitising agent (glass microspheres) have significant influence on the rate of hydrogen peroxide decay in such formulations. In terms of the thermal features of the tested energetic materials, a similar and significant influence of the auxiliary oxidising agent and sensitising agent choice was observed.
View Article and Find Full Text PDFEvaluation of mineral induction ability and cytotoxicity of carbonated hydroxyapatite for pulp tissue regeneration: an study.
Restor Dent Endod
November 2024
Department of Cariology, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences, Chennai, TN, India.
Objectives: This study aimed to evaluate carbonated hydroxyapatite (CHA)'s ability for mineral induction and its cytotoxicity with human dental pulp cells.
Materials And Methods: Precursors for the study include di-ammonium hydrogen phosphate and calcium nitrate tetrahydrate, with sodium hydrogen carbonate added to achieve different levels of carbonate substitution. The synthesized CHA samples are characterized using X-ray diffraction, Fourier transform infrared spectroscopy, and Raman spectroscopy.
In Vitro Evaluation of the Influence of Biosynthesized Calcium Oxide Nanoparticles on the Antibacterial Activity, pH, Microleakage and Cytotoxicity of Conventional Intracanal Medicaments.
Int J Mol Sci
November 2024
Center for Innovation and Research in Oral Sciences (CIROS), Faculty of Medicine, University of Coimbra, 3000-075 Coimbra, Portugal.
Intracanal medicaments are an important adjunct to the effective disinfection of the root canal system. However, conventional intracanal medicaments do not provide adequate protection against , which is the organism of interest in many cases of root canal failures. This study aimed to evaluate the influence of biosynthesized calcium oxide nanoparticles (CaO NPs) on the antibacterial activity, pH, microleakage and cytotoxicity of intracanal medicaments.
View Article and Find Full Text PDFInfluence of nitrogen treatments on some nutrient concentration and bioactive compounds of broccoli.
BMC Plant Biol
November 2024
Faculty of Agriculture, Department of Horticulture, Ordu University, Ordu, Türkiye.
Article Synopsis
- Nitrogen fertilization is crucial for broccoli growth, and the type of nitrogen source (ammonium sulfate vs. calcium nitrate) impacts the quality of bioactive compounds and nutrient content in different broccoli cultivars (Monet, Italian, and Karadede).
- The study found that nitrate-based fertilizers increased total phenolic and flavonoid contents, while ammonium treatments resulted in higher DPPH values; cultivar Monet exhibited the highest overall levels of bioactive compounds.
- Leaf nutrient analysis revealed that ammonium sulfate led to higher sulfur, zinc, and manganese levels, while calcium nitrate provided more calcium and iron, highlighting the importance of nitrogen source and cultivar selection for broccoli quality.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!