Isolation of a novel manganese-oxidizing bacterium M125: characterization, structural evolution, and Cd-adsorption activity of biogenic Mn oxides produced by the strain.

Introduction: Manganese-oxidizing bacteria (MOB) play a critical role in converting soluble Mn(II) to insoluble Mn(III/IV) oxides, which have been widely applied for environmental remediation, particularly in heavy metal pollution control. Therefore, the discovery of novel MOB strains is of great significance for advancing pollution mitigation and ecosystem restoration.

Methods: In this study, a manganese-oxidizing bacterial strain was isolated from Mn-contaminated soil near an electroplating factory using selective LB medium supplemented with 10 mmol/L manganese chloride (MnCl), and the Leucoberbelin Blue (LBB) assay was employed to screen and identify strains with strong Mn(II)-oxidation ability.

Anchoring Ligand Electron Enables Robust Metal-Oxygen Coordination Toward 4.5 V O3-Type Sodium-Ion Battery Cathodes.

High-voltage operation enables sodium-sufficient O3-type layered oxides to approach the maximum achievable energy densities for practical sodium-ion batteries (SIBs). This high-voltage regime, however, induces structural degradation strongly correlated with oxygen redox activity, a mechanism still incompletely resolved. Using prototypical O3-type NaNiFeMnO (NFM) as a model system, we identify the origin of this instability as a detrimental feedback loop between σ-type oxygen redox and cation migration.

In Situ TEM Reveals Direct One-Step Reduction of van der Waals Crystal MoO to Mo.

Molybdenum oxides (MOs) exhibit rich polymorphism and tunable properties, yet their phase transformation pathways are poorly understood. Here, we employ in situ environmental transmission electron microscopy (TEM) to reveal a direct reduction of MoO to metallic Mo, bypassing known intermediate phases such as MoO and MoO. Surface nucleation begins at approximately 800 °C and is completed at 900 °C.

Impact of chloramphenicol and preheat treatment of activated sludge on biohydrogen production from food waste.

Biohydrogen (BioH) provides a clean and sustainable energy solution derived from renewable organic waste. This study comparatively evaluated the effects of preheat and chloramphenicol treatments on sludge for biohydrogen production from food waste through anaerobic dark fermentation (An-DF). Preheat treatment is more effective, yielding 5.

CSFformer: Redefining multi-channel time series analysis with cross-scale fusion Transformer.

Current Transformer models with channel independence (CI) have made tremendous achievements in time series data analysis. However, the CI methods suffer from short-term fluctuations with intra-channel noise and long-term trend extraction. The fixed receptive field of CI models struggles with capturing multi-scale temporal features within each channel.

Recent Advances of Microcapsule-based Intelligent Coatings: From Bioinspired Designs, Material Selections, to Potential Applications.

Coating technology is widely used in diverse fields such as energy, healthcare, and aerospace because of the advantages of simple fabrication, low cost, stability, and customized functions. However, conventional coatings fall short in meeting the emerging demands due to their single functionality and non-responsiveness. Inspired by natural prototypes, microcapsule-based intelligent coatings (MICs) that exhibit remarkable responsiveness to external stimuli have been developed and used in various fields such as corrosion protection and anti-fouling.

Drug functionalized organic electromechanical transistor for rapid and sensitive detection of C-reactive protein.

C-reactive protein (CRP) is a critical biomarker for inflammation and postoperative recovery monitoring. Organic electrochemical transistor (OECT) plays a key role in CRP detection, however, with a limited sensitivity in physiological environment due to inefficient charge transfer within the Debye length. Here, we introduce rosuvastatin (RSV) drug as a novel recognition element for CRP detection in OECT biosensors.

Interaction of Single Bacteria and Phage Revealed and Quantified by Electrochemical Collision Technique.

Interactions between phage and bacteria play pivotal roles in many fundamental biological processes and practical sensing and therapy applications, while direct in situ observation of their interaction at the single bacterial level remains a great challenge. Herein, the electrochemical collision technique was used to investigate the phage-bacteria interactions at different stages. Besides using a surface blockage strategy to evaluate the phage-induced change in concentration and morphology of the , we also found very interesting discrete spikes in the current-time recordings during the bacteria damage and lysis processes, ascribing to the released membrane vesicles with HO from the host bacteria.

Room Temperature Ring Opening of Benzene by Four-Electron Reduction and Carbonylation.

Cleaving a benzene ring under mild conditions requires disrupting its aromaticity, which is a significant challenge in modern chemistry. Although the generation of cyclic products from cleaving benzene has been reported in a few cases, the formation of acyclic products remains exceedingly rare. Inspired by the transition metal-mediated cleavage of inert bonds through multielectron reduction and functionalization, we have discovered an unprecedented ring-opening protocol for benzene and toluene.

Novel supplementation of Fe3O4-doped green carbonized nanoparticles on hydrogenases genes and microbial biodiversity for enhancing biohydrogen yield in dark fermentation microbial electrohydrogenesis cells.

Achieving high-purity biohydrogen (Bio-H₂) production necessitates the suppression of hydrogenotrophic methanogens, as their activity can impede hydrogen yield. Various inoculum pretreatments have been employed to suppress methane-producing microorganisms; however, these methods can negatively impact the enzymatic activity of hydrogen-producing microorganisms, thereby reducing hydrogen production. To address this challenge, this research investigates a novel approach to enhance Bio-H₂ production by activating microbial enzymes using magnetite Fe₃O4-doped carbonized nanoparticles (NPs) derived from vegetable leaves (VLCFe₃O4-NPs) within a coupled dark fermentation-microbial Electrohydrogenesis system.

D-tagatose biotransformation from lactose by lactase and recombinant Bacillus subtilis expressing l-arabinose isomerase, and the product separation, purification and crystallization.

d-Tagatose is a low-calorie rare sugar with notable physiological benefits. The recombinant Bacillus subtilis expressing L-arabinose isomerase (LAI) was constructed and used together with lactase for biotransformation of d-tagatose from cheap substrate of lactose. Under optimum conditions, 45.

Advancements and Design Strategies for Self-Supported Electrocatalysts Operating in Alkaline Conditions at High-Current-Density.

Alkaline water splitting is one of the most mature sustainable hydrogen production methods. However, the overall efficiency of alkaline water electrolysis is significantly constrained by the anode oxygen evolution reaction, where the four-electron transfer process leads to slow reaction kinetics, limiting the achievement of efficient and cost-effective hydrogen production at high-current-density. Although substantial efforts have been made in the academic community to enhance the activity of electrocatalysts, challenges remain in achieving high activity and stability of catalysts at high-current-density.

One-Step Carbonization Tailored Functional Groups and Micropores toward Fast and Durable Na-Ion Storage in Hard Carbon.

Sodium-ion batteries offer a cost-effective solution for energy storage and fast charging, but developing anodes with high capacity, fast charging, and long cycle life remains challenging. Micropores combined with specific functional groups constitute the most ideal design for facilitating pseudocapacitive reactions in hard carbon anode. However, there has been scarce research in this field because the methods for customizing micropores and functional groups are different.

Silicon Heterojunction Solar Cells with Nanocrystalline Silicon Oxide Emitter for Achieving High Fill Factor.

Emitter and transparent conductive oxide (TCO) films are the critical functional layers of extremely promising silicon heterojunction (SHJ) solar cells. Here, p-type nanocrystalline silicon oxide (nc-SiO:H(p)) are employed as the emitter, replacing the widely used nanocrystalline silicon. The nc-SiO:H shows a mixed-phase structural characteristic of nanocrystalline silicon grains and amorphous silicon oxide, in which the former spans the whole emitter, facilitating the carrier collection.

Fluorescence Visualization of Strain by Tetraphenylethylene/Ruthenium Complex Three-Dimensional Covalent Organic Framework Assemblies.

Dynamic visualization of strain and its distribution in materials are still challenging. Herein, dual-fluorophore three-dimensional covalent organic frameworks (3D-COFs) and the PEGylated 3D-COFs (PEG-3D-COFs) were synthesized for the construction of physically interacted assemblies to realize fluorescence imaging on not only strain distribution but also strain-related surface friction and flow velocity distributions in various media including polymer elastomers, organic or aqueous dispersions. The responsiveness arises from the controllability of the aggregation structure of 3D-COFs and PEG-3D-COFs, showing concentration-dependent morphology and photoluminescence, and meanwhile having a concentration-deformation equivalence on the structural evolution dynamics which drives the color change of the COF emission in the solids and liquids with high sensitivity and reversibility, whenever the superstructure of the COF assemblies is affected by the applied strain on the matrices.

Quantification of Tryptophan Enantiomers in a Single Cell by β-Cyclodextrin-Modified Carbon Nanopipettes.

Tryptophan levels in the human body are closely related to disease development and metabolic processes, but identification and quantification of tryptophan enantiomers at the single-cell level is still very challenging now. Herein, the mono-(6-ethanediamine-6-deoxy)-β-cyclodextrin (β-CD)-modified carbon nanopipet (CNP) was fabricated, and high-enantioselective electrochemical detection of tryptophan was achieved. Interestingly, the selectivity of the prepared CNP toward l-tryptophan (l-Trp) and d-Tryptophan (d-Trp) could be modulated by adjusting the solution pH.

Total Synthesis of the Putative Structure of Didemniserinolipids A and C.

The total syntheses of the putative structure of serinolipid didemniserinolipids A and C have been achieved in 12 or 13 longest linear steps by divergent strategies starting from chiral pool methyl d-mannopyranoside, respectively. The key transformations include a sequential reaction of Bernet-Vasella-type reductive elimination and Horner-Wadsworth-Emmons in a one-pot process and a cascade reaction of desilylation/deacetalization/selective intramolecular spiroketalization involving the generation of the critical 6,8-dioxabicyclo[3.2.

Photoinduced N-heterocyclic nitrenium-catalyzed single electron reduction of α-chloro esters for phenanthridine synthesis.

Visible-light photoredox catalysis has revolutionized synthetic methodologies by enabling sustainable radical-mediated transformations under mild conditions. Herein, we report a catalytic protocol employing N-heterocyclic nitrenium (NHN) iodide salts to drive the photoreduction of α-chloro esters, generating alkyl radicals that participate in annulation with 2-isocyanobiaryls for the modular synthesis of phenanthridine derivatives. This approach is characterized by easily available NHNs and operational simplicity.

In Situ Reconfigured Heterostructure Active Sites on Transition Metal Sulfides Heterojunction for Accelerated Water Oxidation.

Transition metal sulfides (TMSs) are promising noble-metal-free electrocatalysts for electrochemical water splitting due to their distinctive physical and chemical properties, but they usually undergo complicated structure reconfiguration during the oxygen evolution reaction (OER). Precisely controlling the reconfiguration of TMSs for in situ generation of high-activity real active sites still remains a great challenge. Herein, we propose to in situ reconfigure heterostructure active-sites on transition metal sulfides via heterojunction engineering and achieve high OER performances on (Ni,Fe)S/MoS catalysts.

Dynamic Induction of Conversion-Based Anode Degradation by Valence State and Mechanical Cracks.

Electrochemical energy storage through conversion reactions in crystalline electrode materials primarily depends on the size of guest ions. In this study, a combination of synchrotron-based transmission X-ray microscopy and X-ray absorption near edge spectroscopy is utilized to reveal the dynamic physicochemical changes in the micro-regions of spherical NiS active particles during the potassiation/depotassiation process. The findings show that, as the degree of potassiation increases, visible cracks and voids form within the bulk material, with significant differences in the chemical valence states of metal elements between the inner and outer regions.

In Situ Multiscale Study of Iron Oxidation at High Temperatures.

Although high-temperature oxidation of metals results in significant failure of structure materials, in situ understanding of these processes and developing improved strategies are still very limited. Herein, using environmental scanning electron microscopy (ESEM), environmental transmission electron microscopy (ETEM), and X-ray photoelectron spectroscopy (XPS), we report the in situ dynamic high-temperature oxidation behaviors of iron in O, HO, and O + HO atmospheres, respectively. The results demonstrate that an oxygen-rich environment (1.

Fugitive gases reduction and carbon sequestration potential of ecological floating beds.

Ecological floating beds (EFBs) are widely utilized as a green, cost-effective, and efficient technology for biologicalwater treatment in ponds, rivers, and secondary treatment of wastewater plant effluents. However, their potential for greenhouse gas (GHG) absorption and transformation is often overlooked. This paper begins by summarizing the accounting and emission status of GHGs from wastewater treatment plants (WWTPs), reviewing plant-microbial interactions in the phyllosphere and rhizosphere, and exploring plant-microbial-mediated transformations of carbon and nitrogen cycles.

Single Catalyst with Dynamic Ligands Enabled Synthesis of Olefin Block Copolymers.

Olefin block copolymers (OBCs) are among the most advanced classes of polyolefins, produced in large quantities as part of the approximately 200 million tons of polyolefins produced annually. However, current OBCs manufacturing relies on a complex, costly, two-catalyst process that requires hazardous chain shuttling agents. A more efficient approach using a single catalyst for the synthesis of the OBCs is highly desirable but remains significantly challenging.

Near-Infrared-Light-Induced Iron(I) Dimer Enabled Abstraction of Ester Group from Cycloketone Oxime Esters.

Photoinduced dimeric metal complexes have been extensively utilized in halogen atom transfer (XAT) reactions. In this study, we successfully achieved the abstraction of ester group from cyclobutanone oxime esters via iron(I)-dimer catalysis under near-infrared (NIR) light (730 nm) excitation, enabling the efficient synthesis of cyanoalkylated alkenes, quinazolinones, and 3,3-disubstituted oxindoles. Mechanistic investigations confirmed the NIR-induced functional group abstraction process.

Eco-friendly production, separation and purification of D-tagatose and D-allulose from whey powder via one-pot whole-cells biotransformation, yeast fermentation and chromatography.

Whey powder (WP), a dairy by-product with high biochemical oxygen demand (BOD) and chemical oxygen demand (COD), presents challenges due to its high production, low-value utilization, and environmental pollution. Based on the idea of turning waste into treasure, high-value use of WP was studied. Firstly, an engineered Bacillus subtilis co-expressing β-galactosidase (β-Gal) and L-arabinose isomerase (LAI) was constructed, which ultimately yielded 77.