This minireview considers the disruption of the host-microbiota harmless symbiosis in the subgingival niche. The establishment of a chronic infection by subversion of a commensal microbiota results from a complex and multiparametric sequence of events. This review narrows down to the interplay between oxygen, iron and sulfide that can result in a vicious cycle that would favor peroxygenic and glutathione producing streptococci as well as sulfidogenic anaerobic pathogens in the subgingival niche. We propose hypothesis and discuss strategies for the therapeutic modulation of the microbiota to prevent periodontitis and promote oral health.
Collaborative Innovation Center of Recovery and Reconstruction of Degraded Ecosystem in Wanjiang Basin Co-founded by Anhui Province and Ministry of Education, School of Ecology and Environment, Anhui Normal University, Wuhu 241002, China; Anhui Provincial Engineering Laboratory of Water and Soil Pollution Control and Remediation, Anhui Normal University, Wuhu 241002, China. Electronic address:
Iron reduction impacts the mobilization and thionation of diphenylarsinic acid (DPAA) in soil, but the contribution of crystalline and non-crystalline iron remains unknown. A paddy soil deficient in non-crystalline iron (P-Fe), crystalline and non-crystalline iron (P-Fe) were incubated with sulfate-plus-lactate, and the results were compared with paddy soil (P) in our previous study. For treatments without ferrous sulfide (FeS) precipitation, the solution-to-solid ratio (R) of DPAA increased slightly and dramatically with iron reduction, respectively, for P-Fe and P, suggesting that the reduction of non-crystalline iron contributes more to DPAA mobilization than crystalline iron.
To more accurately grasp the current status and trends in the density functional theory (DFT) study of iron sulfur compounds, this paper presents a bibliometric analysis of 821 documents from 2000 to 2023. The literature source is the Web of Science (WOS) core data set. The results show that China is the country with the highest publication volume (247, 30.
Understanding how abiotic carbon fixation worked gives us clues about early life on Earth, particularly in hot springs where iron sulfide (FeS) might have played a key role in creating essential prebiotic compounds.
Research shows that different types of FeS, especially those doped with manganese (Mn), significantly enhance the conversion of carbon monoxide (CO) into methanol, with a five-fold increase in production at high temperatures.
The study also reveals that both regular and UV light can boost this process, indicating that FeS-catalyzed fixation could have been vital for carbon cycling in early Earth's environments, with implications for the origins of life.
Carbon removal from the atmosphere is needed to keep global mean temperature increases below 2 °C. Here, we develop a model to explore how alkalinity production through enhanced iron sulfide formation in low-oxygen aquatic environments, such as aquaculture systems, could offer a cost-effective means of CO removal. We show that enhanced sulfide burial through the supply of reactive iron to surface sediments may be able to capture up to a hundred million tonnes of CO per year, particularly in countries with the highest number of fish farms, such as China and Indonesia.
