Effective multicolor visual biosensor for ochratoxin A detection enabled by DNAzyme catalysis and gold nanorod etching.

A novel detection technique is introduced that offers sensitive and reliable ochratoxin A (OTA) detection. The method leverages the etching of gold nanorods (AuNRs) stabilized by hexadecyl trimethyl ammonium bromide (CTAB) using the oxidized form of 3,3',5,5'-tetramethyl benzidine sulfate (TMB), creating a susceptible multicolor visual detection system for OTA. The visual detection is enabled by Mg-assisted DNAzyme catalysis combined with the catalytic hairpin assembly (CHA) signal amplification strategy.

Self-Poled Bismuth Ferrite Thin Film Micromachined for Piezoelectric Ultrasound Transducers.

Piezoelectric micromachined ultrasound transducers (pMUTs), especially those using lead-free materials, are crucial next-generation microdevices for precise actuation and sensing, driving advancements in medical, industrial, and environmental applications. Bismuth ferrite (BiFeO) is emerging as a promising lead-free piezoelectric material to replace Pb(Zr,Ti)O in pMUTs. Despite its potential, the integration of BiFeO thin films into pMUTs has been hindered by poling issues.

[Spatial-temporal Evolution and Influencing Factors of Land Use Carbon Emissions in Shandong Province].

Exploring the spatial-temporal evolution characteristics of land use carbon emissions and their influencing factors is of great significance for the optimization of land use structure, the formulation of emission reduction policies, and the development of a regional low-carbon economy. Based on land cover and energy consumption data, a multi-parameter land use carbon emission accounting system was constructed to calculate land use carbon emissions in Shandong Province. Moreover, the spatial-temporal evolution and influencing factors of land use carbon emissions were analyzed based on the Gini coefficient and logarithmic mean Divisia index.

Sandwich-type electrochemical immunosensor based on Au NPs/3D hierarchical porous carbon network and Au NPs/CuS nanocages for the detection of alpha-fetoprotein.

Alpha-fetoprotein (AFP), serves as a reliable and vital biomarker for precise diagnosis and effective monitoring of hepatocellular carcinoma, requires precise detection. Herein, a sandwich-structured electrochemical immunosensor was crafted, employing three-dimensional layered porous carbon modified with gold nanoparticles (Au NPs) as the substrate and Au NPs/CuS as the labeling compound for accurate and sensitive detection of AFP. Due to the effective coordination between the 3D carbon network, Au NPs, and hollow CuS nanocubes, the sandwich-structured electrochemical immunosensor was able to produce three distinct response signals via various detection techniques, demonstrating a broad linear range (0.

A sequence-activatable dual-locked fluorescent probe for simultaneous detection of hypochlorous acid and peroxynitrite during drug-induced liver injury.

Drug-induced liver injury (DILI) is a crucial factor that poses a significant threat to human health. DILI process leads to the changes of reactive oxygen species and reactive nitrogen species content in cells, which leads to oxidative and nitrosative stress in cells. However, the high reactivity of hypochlorous acid (HOCl) and peroxynitrite (ONOO⁻), combined with a lack of in situ imaging techniques, has hindered a detailed understanding of their roles in DILI.

In situ formation of boronic acid-based covalent organic frameworks for specific and ultra-sensitive electrochemical assay of glycosylated amyloid-beta proteins.

Alzheimer's disease (AD) significantly impacts the well-being of older people around the world. However, the accurate detection of glycosylated amyloid-beta (Aβ) proteins, which serve as important biomarkers for AD, remains challenging due to their extremely low levels. To address these issues, we proposed a method for fabricating a flexible and stable sensor platform based on an innovative boronic acid-based covalent organic framework COF-B(OH).

Leveraging oyster shell and zero-valent iron to eliminate excessive acidification and enhance methane production from readily acidified substrates.

Anaerobic digestion is a sustainable technology for methane (CH) production from organic waste and wastewater. However, its performance is frequently hindered by excessive acidification in readily acidified substrates, such as starch wastewater. Oyster shell (OS), a natural alkaline material, effectively regulates pH and enhances CH production.

FeCu-N-C Diatomic Sites Catalyst for the Boosted Oxygen Reduction Reactions in Zinc-Air Batteries.

Due to the high catalytic activity and stability for oxygen reduction reaction, N-coordinated Fe-Cu dual-metal doped carbon material (FeCu-N-C) is considered to be one of the promising electrode materials for metal-air battery and fuel cells. Herein, FeCu-N-C dual-metal catalysts was synthesized by an adsorption-calcination strategy. The prepared FeCu-N-C exhibited high activity and stability both in alkaline and acidic media.

High-Entropy Alloy Nanoflower Array Electrodes with Optimizable Reaction Pathways for Low-Voltage Hydrogen Production at Industrial-Grade Current Density.

Developing sufficiently effective non-precious metal catalysts for large-current-density hydrogen production is highly significant but challenging, especially in low-voltage hydrogen production systems. Here, we innovatively report high-entropy alloy nanoflower array (HEANFA) electrodes with optimizable reaction pathways for hydrazine oxidation-assisted hydrogen production at industrial-grade current densities. Atomic-resolution structural analyses confirm the single-phase solid-solution structure of HEANFA.

Enhanced Hydrogen Storage Capacity in OLi-Decorated Holey Graphitic Carbon Nitride Monolayer.

The primary challenge hindering the widespread adoption of hydrogen energy is its storage, highlighting the need for effective storage media. In this study, we utilize first-principles calculations to systematically evaluate the superalkali cluster OLi decorated on a CN monolayer for its potential as an efficient hydrogen storage material. Our findings reveal that the OLi cluster binds to each side of the CN monolayer through a charge transfer mechanism, exhibiting a binding energy of 12.

Correlation between ligand-mediated silver species on TiO nanosheet with the photocatalytic hydrogen evolution activities.

Metal oxide photocatalysts loaded with metal species are extremely important in photocatalysis. The physicochemical states of metal species, as well as the interaction between metal species and support, determine the transfer of charge carriers between the heterointerface, which has a significant impact on photocatalytic activity. Here, we prepared anatase TiO nanosheets (TIO) modified with different Ag species, including single atoms, clusters, and nanoparticles, using a ligand-mediated method.

Breaking the Spin-Forbidden Restriction to Achieve Long Lifetime Room-Temperature Phosphorescence of Carbon Dots.

Room-temperature phosphorescent (RTP) carbon dots (CDs) demonstrate significant potential applications in the field of information anticounterfeiting due to their excellent optical properties. However, RTP emission of CDs remains significantly limited due to the spin-forbidden properties of triplet exciton transitions. In this work, an in situ nitrogen doping strategy was employed to design and construct strong spin-orbit coupling nitrogen-doped CDs with mesoporous silica with alumina (N-CDs@MS@AlO) RTP composites.

Enrichment mechanism and probabilistic health risk assessment of high-fluoride groundwater in Gaomi City, China.

Fluoride (F) is the most important inorganic pollutant in groundwater that affects human health, and analyzing the causes of high-fluoride groundwater is a prerequisite for protecting the health of residents. To comprehensively understand the enrichment characteristics of groundwater in the high-fluoride areas, this study systematically investigated the concentrations of fluoride in Gaomi City, a typical study area in the Jiaolai Plain and explored the spatiotemporal distribution patterns, enrichment mechanisms, and the probabilistic health risk associated with F. The results indicate that there is serious fluorine pollution in groundwater, which is mainly concentrated in the alluvial plain in the north and affected by topographical and aquifer characteristics.

[Intercropping history, pattern, and case analysis of Chinese medicinal material].

Intercropping is a traditional and widely used planting pattern, and different intercropped plants have differences in spatial distribution and morphological structure compared with monoculture. Therefore, intercropping can realize efficient acquisition of limited space resources and efficient conversion of existing resources by utilizing the principle of niche complementarity of composite groups, weakening interspecific or intra-specific competition, and enhancing their complementary growth. Intercropping of Chinese medicinal material(CMM) has experienced the evolution of more than two thousand years from its founding to inheritance and development.

Ingenane diterpenoids with anti-inflammatory activity from Euphorbia antiquorum.

The Euphorbia plants are famous for their diterpenoid constituents with diverse structures and broad biological activities. Herein, the discovery of 15 ingenane diterpenoids including 10 previously unreported ones (1-10) from Euphorbia antiquorum was presented. Structures of the undescribed compounds were established via detailed spectroscopic analyses.

Microalgal-bacterial biofilms enhance pollutant removal coupling with eicosapentaenoic acid production in high-concentration ammonia‑nitrogen wastewater.

Microalgal-bacterial biofilms have emerged as a promising approach for wastewater treatment. However, its potential to treat high-concentration ammonia‑nitrogen wastewater coupling with high-value fatty acid production remains unclear. Therefore, this study explored the efficiency of a microalgal-bacterial biofilm in treating high-concentration ammonia‑nitrogen wastewater and its ability to produce high-value fatty acids, with the activated sludge (bacteria) and microalgal-bacterial suspension as control.

Aggregation-Induced Electrochemiluminescence of Silica-Confined Tetraphenylethylene with Pd Nanocube-Loaded CoO Nanosheets as a Coreaction Accelerator for Sensitive Bioanalysis.

Aggregation-induced electrochemiluminescence (AIECL) provides a new approach for the development of novel electrochemiluminescence (ECL) strategies. Herein, a biosensor was constructed by incorporating 1,1,2,2-tetra(4-carboxylphenyl)ethylene (HTCPE) into a mesoporous silica nanosphere (MSN) to obtain a highly organized AIECL luminophore of (MSN-HTCPE) for signal antibody (Ab) labeling and using Pd nanocube (NC)-loaded CoO nanosheets (NSs) (PdNCs/CoONSs) as a novel coreaction accelerator. The confinement of HTCPE molecules in the MSN restricted the intramolecular rotation and thus enhanced the radiation transition of HTCPE.

Disorder-induced phase transitions in a two-dimensional magnetic topological insulator system.

We investigate the phase diagram of a two-dimensional magnetic topological system in the parameter space of uncorrelated Anderson disorder and Zeeman splitting energy. In the absence of disorder, the system undergoes the phases of higher-order topological insulators (HOTIs), Chern insulators (CIs) with Chern numbers = 2 and = 1, and band insulators successively with enhancing Zeeman energy. The phase boundary separating these phases is found to be strongly deformed by the disorder, which leads to several topological Anderson insulators.

Multifunctional all-dielectric quarter-wave plate metasurfaces for generating focused vector beams of Bell-like states.

The generation of vector beams using metasurfaces is crucial for the manipulation of light fields and has significant application potential, ranging from classical physics to quantum science. This paper introduces a novel dielectric metasurface composed of quarter-wave plate (QWP) meta-atoms, known as a QWP metasurface, designed to generate focused vector beams (VBs) of Bell-like states under right circularly polarized illumination. The propagation phase imparted on both the co- and cross-polarized components of the output field constructs hyperbolic and helical phase profiles with topological charge , whereas the Pancharatnam-Berry (PB) phase acts only on the cross-polarized component to construct another helical phase profile with topological charge .

Self-Selective (220) Directional Grown Copper Current Collector Design for Cycling-Stable Anode-Less Lithium Metal Batteries.

Anode-less lithium metal batteries (ALLMB) are promising candidates for energy storage applications owing to high-energy-density and safety characteristics. However, the unstable solid electrolyte interphase (SEI) formed on anode copper current collector (CuCC) leads to poor reversibility of uneven lithium deposition/stripping. Though the well-known knowledge of lithium salt-derived inorganic-rich SEI (iSEI) benefiting uniform lithium deposition, how to design a lithium salt-philic CuCC with undiscovered salt-philic facet that favors lithium salt adsorption and catalyzing salt decomposition into iSEI, remains unexplored yet.

Application of Bacillus cereus for synthesis of polyhydroxyalkanoates from industrial corn starch residue.

Starch hydrolysate from corn is typically employed as a carbon source for citric acid production by Aspergillus niger. Enzymatic or acid hydrolysis of corn starch generates a corn starch residue (CSR), which represents a potential bio-fermentation carbon source. In addition, polyhydroxyalkanoates (PHAs) can be used as an alternative to traditional petrochemical plastics.

Cooperation of covalent bonds and coordinative bonds stabilizing the Si-binder-Cu interfaces for extending lifespan of silicon anodes.

Binders provide a straightforward and efficient strategy to mitigate the significant challenge of volume expansion in silicon anodes for lithium-ion batteries. To improve the cycle life of silicon anodes, a cross-linked binder carboxymethyl cellulose-phytic acid-pyrrole (CMC-DP) is designed and synthesized using carboxymethyl cellulose, phytic acid, and pyrrole. The numerous hydroxyl groups in phytic acid provide abundant binding sites for the formation of hydrogen and ester bonds.