Efficient nitrogen removal by the aerobic denitrifying bacterium Pseudomonas stutzeri RAS-L11 under triple stresses of high alkalinity, high salinity, and tetracycline: From performance to mechanism.

Efficient aerobic denitrification bacteria are rarely reported under triple stresses of high alkalinity, high salinity, and tetracycline. Here, strain Pseudomonas stutzeri RAS-L11 was isolated, under the optimal reaction conditions of C/N = 6, sodium acetate as carbon source, and pH 7.0-11.

Frontiers in Bioinspired Polymer-Based Helical Nanofibers from Electrospinning.

Helices are among the most significant structures in nature, representing an emerging group of materials distinguished by their unique helical geometry. Recently, helical nanofibers have attracted considerable attention due to their exceptional structural characteristics and versatile applications in various fields, including tissue engineering, biomedicine, nanotechnology, and chiral materials. Therefore, developing methods to fabricate biomimetic helical fibers on demand, which can exhibit a diverse range of physical properties and forms, is of great interest across multiple disciplines.

Microbial network-driven remediation of saline-alkali soils by salt-tolerant plants.

Salt-tolerant plants (STPs) play an important role in saline-alkali soil remediation, but their interaction with soil microorganisms remain incompletely elucidated. This study explored the effects on microbial community structure, function, and soil quality in saline-alkali land of four treatments: no plant (CK), L. (TA), Lour.

Stabilize Perovskite Precursors and Inhibit Intermediates for High Performing Perovskite Solar Cells.

Significant power conversion efficiency (PCEs) advancements have been made in perovskite solar cells (PSCs). However, the degraded precursor can severely affect the crystallinity and reproducibility of the films, and the stability of the perovskite precursor and the intermediate phases during film growth remains a considerable hurdle. Here the saccharin sodium (SacS) is introduced into the perovskite precursor.

PhICl/KSeCN Mediated Synthesis of Selenopheno[3,2-]indoles and 3-Selenocyanato-2-benzoselenophene Indoles from 1,3-Diynes via Double Electrophilic Cyclization.

A hypervalent iodine-enabled double intramolecular electrophilic cyclization of 1,3-diynes has been employed in the synthesis of selenopheno[3,2-]indoles and 3-selenocyanato-2-benzoselenophene indoles. A plausible mechanism involving the formation of the reactive Cl-SeCN species from the reaction of PhICl and KSeCN, followed by cascade cyclization involving C-N/C-Se bond formations, was postulated.

Mechanism of polyphenol-pea starch complexes on reducing fat accumulation in Caenorhabditis elegans.

Obesity is characterized by lipid metabolism disorders and excessive fat accumulation, imposing a significant burden on individuals and society. Polyphenol-pea starch (PS) complexes have shown considerable potential in alleviating fat accumulation, yet the mechanisms underlying these effects remain unclear. This study investigated the effects and underlying mechanisms of gallic acid-PS (GAL-PS), ferulic acid-PS (FER-PS), quercetin-PS (QUE-PS), and tannic acid-PS (TAN-PS) complexes at a dosage of 1 mg/mL in reducing fat accumulation in Caenorhabditis elegans.

Dynamic events-based adaptive NN output feedback control of interconnected nonlinear systems under general output constraint.

This paper investigates the adaptive NN output feedback tracking control problem for a class of interconnected nonlinear systems. Unlike the existing control algorithms, we propose a dynamic event-triggered output constraint control algorithm.First, a reduced-order dynamic gain K-filter is established to construct the unmeasurable state variables.

Combined Effect of Low-Temperature Stress and Slightly Acidic Electrolyzed Water (SAEW) on the Microbial Control of Oat Sprout Production.

Sprouts have many advantages, such as high nutritional value and simple cultivation conditions. In recent years, the loss rate of sprouts due to microbial contamination has been as high as 40%, and it is necessary to strengthen microbial control technology to reduce such losses. Current microbial control methods have issues such as a narrow bactericidal spectrum and high cost and contamination, whereas slightly acidic electrolyzed water (SAEW), as a new type of disinfectant, can solve these problems.

[Spatial and Temporal Differences and Influencing Factors of Mobile Genetic Elements in Urban and Suburban River Sediments in Shijiazhuang City].

With the widespread use of antibiotics in medicine and agriculture, the spread of antibiotic resistance genes （ARGs） in the environment has become a serious threat to ecological balance and human health, particularly for its role in facilitating the emergence of multidrug-resistant pathogens. The study of riverine environments as a major transmission route for ARGs and closely related mobile genetic elements （MGEs） is of great importance. MGEs exacerbate the spread of resistance genes by facilitating the horizontal transfer of ARGs in bacterial populations.

Distributed Non-Fragile State Estimation for Uncertain Nonlinear Systems of Sensor Networks Subject to Sensor Nonlinearities.

This paper studies the distributed state estimation issue of nonlinear dynamical systems with parameter uncertainties based on sensor networks under the non-fragile control framework. Moreover, all the sensors are in a fully distributed framework with information exchanges to reduce the communication and computation resources. In particular, the sensor nonlinearities in the sensor network and state estimation gain fluctuations are taken into account for more general applicability.

An Insight into the Crystal Growth of 7-Aminodeacetoxycephalosporanic Acid from the Perspective of the Growth Unit.

Crystal growth plays a key role in product attributes and downstream processing, whereas insight into the crystal growth mechanism, especially growth unit structures and behaviors, has been limited. In this work, the growth unit structures and behaviors of 7-aminodeacetoxycephalosporanic acid were explored by experiments and molecular simulations. First, its growth units were determined as the monomer MON I and dimers connected by N-H···O═C (AGG I, 1.

Deletion of the DEAD-box helicase CshA in Lacticaseibacillus paracasei elicits heightened low-temperature sensitivity and reduced post-acidification capacity.

While cold chain logistics remains the primary strategy to mitigate post acidification in fermented dairy products, maintaining reliable refrigeration systems presents substantial challenges, especially in resource-limited settings. Biological approaches targeting strain low-temperature sensitivity modulation for post-acidification control are increasingly recognized as promising alternatives. This study utilized CRISPR/Cas9-mediated knockout of DEAD-box helicase genes in Lacticaseibacillus paracasei, successfully identifying a low-temperature-sensitive strain, ∆AF91_12,710.

High selectivity fluorescence-based CQDs@cellulose membrane sensor for detection of hazardous gas.

Toluene, a harmful gas, is extremely harmful to living organisms, and its distribution and concentration in the environment have always attracted much attention. However, traditional detection methods have poor selectivity, cannot detect low concentrations, and the equipment is bulky, expensive, and time-consuming. In this study, a fluorescence spectroscopy method based on carbon quantum dots (CQDs) composite cellulose membrane (CQDs@CMC membrane) was developed, which addressed the limitations of CQDs, such as excessive operational expenses, intricate detection procedures, and prolonged analysis duration, enabling highly sensitive and specifically targeted detection of toluene gas.

Microstructure evolution and properties of liquid Fe-P with different phosphorus content: molecular dynamic investigation.

Context: With the scarcity of high-quality iron ore, high-phosphorus ores have become increasingly prevalent, posing challenges to maintaining the quality of steel. Phosphorus has emerged as a key factor affecting the fluidity of molten iron and the quality of steel products. Therefore, molecular dynamics method was conducted to analyze phosphorus's impact on the microstructure and properties of liquid iron.

The Effects of Sampling Sites, Collection Time, and Refrigerated Storage Duration on Microbiota of Raw Milk From a Chinese Dairy Farm: An Exploratory Study.

Raw milk is the primary material for all dairy products, making it imperative to characterize and monitor its microbial composition to ensure product quality. To investigate microbial contamination from pasture to processing facilities and establish microbial traceability systems, eighty-seven raw milk samples were collected from a dairy farm in Shijiazhuang of China in August. The raw milk samples were categorized into three experimental groups based on: sampling sites along the production chain (manual milking, buffer tank, filter, refrigeration tank, milk truck, and plant factory), sampling time (before dawn, morning, noon, and afternoon), and refrigeration storage (0-72 h at 12 h intervals).

Enzymatic modification of whole wheat dough gluten matrix development and bread quality by a novel wheat arabino-xylanase from Podospora comata with its properties and substrate specificity mechanism.

To promote greater gluten matrix development and improve whole wheat bread quality, a novel wheat arabino-xylanase (PcXyn11A) from Podospora comata was extracellularly expressed in Pichia pastoris. The enzymatic activity of the recombinant PcXyn11A reached 727 U/mL at 4.4 mg/mL concentration, following high cell-density fermentation in a 5-L fermenter.

Highly Selective Oxygen Electroreduction to Hydrogen Peroxide on Sulfur-Doped Mesoporous Carbon.

As a paradigm-shifting material platform in energy catalysis, precisely engineered ordered mesoporous carbon spheres emerge as supreme metal-free electrocatalysts, outperforming conventional carbon-based counterparts through synergistic structural and electronic innovations. Herein, we architecturally design vertically aligned cylindrical mesoporous carbon spheres with atomic-level sulfur doping (S-mC) that establish unprecedented performance benchmarks in the two-electron oxygen reduction reaction (2e-ORR) to hydrogen peroxide. Systematic comparative studies reveal that the S-mC catalysts achieve exceptional HO selectivity (>99%) and activity at current density of -3.

Sb(TeO)(SO): An Anhydrous Tellurite Sulfate with Large Birefringence and Enhanced Thermal Stability.

The birefringence of birefringent materials is positively correlated with structural anisotropy. By introducing 5-electron-containing Sb and Te cations into a sulfate system, the anhydrous antimony tellurite sulfate Sb(TeO)(SO) was obtained. Due to the stereochemically active lone pairs (SCALPs), both Sb and Te cations are four-coordinated with O atoms to form the distorted seesaw-shaped units.

Revealing impact of yeast-lactic acid bacteria cooperation in liquefaction pretreatment on enhancing anaerobic digestion performance of food waste.

Anaerobic digestion (AD) is a promising technology for food waste (FW) treatment and renewable energy recovery, yet hindered by its inefficiencies. This study proposed a cross-kingdom collaborative liquefaction pretreatment (LPT) using Bacillus (lactic acid bacteria, LAB) and yeast to enhance FW biodegradability and improve subsequent AD performance. LPT increased the soluble chemical oxygen demand (SCOD) by 113 %, with ethanol (11,903.

Amorphous-microcrystalline heterostructured high-entropy oxysulfide/cerium oxide with strong electronic communication to boost water/simulated seawater splitting.

Exploring bifunctional transition metal-based oxysulfide with high activities, corrosion resistance and reaction selectivity is a promising strategy to realize efficient water/seawater splitting. Here, amorphous, high entropy and heterostructure strategies are coupled to construct the amorphous-microcrystalline heterostructured high-entropy oxysulfide/cerium oxide (a-NiCoFeOS/c-CeO) by one-step intermittent electrodeposition. With the strong interfacial electronic communication, a-NiCoFeOS/c-CeO shows high bifunctional activities with low overpotentials for hydrogen evolution reaction (47/63 mV) and oxygen evolution reaction (216/220 mV) at 10 mA cm in alkaline water/simulated seawater, respectively.

Construction of carboxyl-functionalized hyper-cross-linked porous polymers using waste polystyrene for effective adsorption of phenolic contaminants.

The extensive presence of phenolic organic contaminants (POCs) poses a serious threat to humans. Meanwhile, the upcycling/reusing of waste polystyrene to reduce the exponential growth of plastic pollution is a very important environmental issue. Addressing these demands, a series of carboxyl-functional hypercrosslinked polymers (labeled PP-HCPs) were constructed by knitting waste polystyrene with pyromellitic dianhydride at different ratios through a one-step Friedel-Crafts reaction for effective adsorption of POCs.

Mechanisms of antifungal activity of ehimensin F6 produced by Paenibacillus ehimensis HD against Penicillium expansum.

Penicillium expansum is a common spoilage fungus in postharvest fruits that can lead to fruit rot and health damage. This study aims to identify the antimicrobial mechanism of antimicrobial peptide named ehimensin F6 from Paenibacillus ehimensis HD against P. expansum.

Response of aerobic denitrification system to long-term stress of sulfamethoxazole, erythromycin and ofloxacin in oligotrophic water.

The responses of aerobic denitrification system to long-term stress of sulfamethoxazole (SMX), erythromycin (ERY) and ofloxacin (OFL) were investigated under low, middle, and high antibiotics stress. Findings showed that the aerobic denitrification performance was enhanced by antibiotics, and was higher than control system. Meanwhile, nitrate removal efficiency reached 43.

Development of curcumin nanoparticle-modified photodynamic gelatin/PVA-chitosan bilayer films for preserving bigeye tuna.

In this study, a biodegradable bilayer film was developed with polysaccharides chitosan as the outer layer and gelatin/polyvinyl alcohol (PVA) as the inner layer materials, incorporating curcumin-chitosan nanoparticles (CCN) as the photosensitizer. The bilayer film was used to prepare a new type of food packaging combined with photodynamic inactivation technology. The results showed that when the CCN content in the film was 2.