Sultamicillin Tosylate

Spill treating agents (STAs) such as surface washing agents (SWA), surface collecting agents (or chemical herders), and solidifiers are designed to alter the behavior of crude oil by enhancing its removal from affected surfaces, aggregating it for easier recovery, or by transforming it into a more manageable solid form. They may be authorized for use under the United States National Oil and Hazardous Substances Pollution Contingency Plan to support oil spill mitigation efforts. By the nature of their role in spill response, direct application to oil or around oil slicks, STAs yield various mixtures of oil components and STA chemicals. This study evaluated the acute toxicity of mixtures of Alaska North Slope crude oil and six STAs (three SWAs, two herders, and one solidifier) using standard freshwater and marine test species. A combination of traditional (frequentist) and Bayesian statistical approaches were used to analyze dose-response data. Results showed that SWAs significantly increased oil toxicity by enhancing the bioavailability of toxic hydrocarbons, where oil and agent mixtures were more toxic than oil alone in approximately 80% of expected cases for the four aquatic species. Meanwhile, herders and solidifiers generally caused minimal changes to oil toxicity. Bayesian credible intervals provided more nuanced differentiation between oil and STA-oil mixtures, revealing the potential for increased ecological risk from certain STA-oil combinations that may be indistinguishable using conventional methods. These findings support a more comprehensive understanding of the toxicity of oil spills treated with STAs and expand the knowledge base for agents with only limited toxicity data.

Metabolic dysfunction‐associated steatotic liver disease (MASLD) is a common chronic liver disease. This study investigates the anti‐MASLD effects of dietary prebiotic stachyose (STA) on disease progression identifying Butyricimonas virosa as a key bacterium boosted by STA supplementation. Oral gavage of B. virosa to high fat diet (HFD)‐fed mice significantly suppresses the progression of MASLD and modulates gut microbiota composition. Integration of metagenomic and metabolomic data demonstrates that B. virosa treatment significantly enhances the production of thiamine monophosphate (TMP), as well as its conversion to thiamine and subsequent accumulation in the liver. The accumulation of hepatic thiamine further leads to elevated thiamine pyrophosphate (TPP) concentrations enhancing the activity of branched‐chain α‐keto acid dehydrogenase E1 subunit α (BCKDHA) associated with augmented degradation of branched chain amino acids (BCAAs). Administration of B. virosa compensates via production of gut bacterial‐derived TMP for hepatic TPP deficiency in mice fed a thiamine‐deficient HFD. A population‐based analysis reveals an inverse correlation between plasma thiamine levels, abundances of bacterial genes involved in thiamine synthesis and metabolism, and phenotypes associated with MASLD, suggesting that key genes involved in fecal thiamine metabolism, as well as serum thiamine determination, may potentially serve as biomarkers for the diagnosis of MASLD.