3D Bioprintable Gt-Alg-MMT Nano Bioink for Cartilage Tissue Engineering.

Damage to articular cartilage is irreversible, and its self-healing ability is minimal. The construction of articular cartilage in tissue engineering requires suitable biomaterials as scaffolds to provide a 3D natural microenvironment for the development and growth of articular cartilage. This study aims to explore the feasibility of Gt-Alg-MMT (gelatin/sodium alginate/montmorillonite) nanocomposite hydrogel as a 3D printing bioink and its applicability in 3D printing cartilage scaffolds.

Calcium lignosulfonate-modified soil-rock mixture: Research on mechanical properties and microscale mechanisms.

The remodeling of soil-rock mixtures (S-RM) in open-pit mining slopes is critical for ensuring dump slope stability and promoting efficient resource recovery. This study investigates the modification of S-RM using calcium lignosulphonate (CLS) to enhance its engineering properties. Unconfined compressive strength (UCS), shear strength, and permeability tests were performed to quantitatively evaluate the effects of modification.

CuCl as a Mg reservoir for in situ interface layer engineering and highly stable Mg plating/stripping.

Although rechargeable magnesium batteries (RMBs) represent a promising post‑lithium energy storage technology, the formation of a non-conductive Mg passivation layer on Mg anodes remains a significant challenge. Here, we develop a novel all-inorganic electrolyte with low overpotential for Mg plating/stripping by introducing electrochemical active CuCl into a MgCl/THF solution (MgCl-CuCl/THF). During cycling, a multi-functional interface layer composed of Cu and CuMgCl is formed in situ on the Mg anode surface, which not only promotes MgCl salt dissociation but also offer rapid-electron transport pathways.

Development of derivatization-enhanced EIEIO-driven glycosidic linkage sequencing (DEED-GL-Seq) strategy and its application to glycogen-sourced oligosaccharides profiling.

The structural complexity arising from diverse glycosidic linkages in oligosaccharides hinders the elucidation of their biological functions. Existing analytical methods often lack the necessary feasibility and accessibility for comprehensive linkage analysis. To address this, we developed Derivatization-Enhanced EIEIO-Driven Glycosidic Linkage Sequencing (DEED-GL-Seq), a novel strategy leveraging differential electron density modulation around glycosidic bonds upon N,N,N,N-tetraethyl-6-hydrazineyl-1,3,5-triazine-2,4-diamine (T3) derivatization.

CPG-Based Control of an Octopod Biomimetic Machine Lobster for Mining Applications: Design and Implementation in Challenging Underground Environments.

Central pattern generators (CPGs) have been extensively researched and validated as a well-established methodology for bionic control, particularly within the field of legged robotics. However, investigations concerning octopod robots remain relatively sparse. This study presents the design of an octopod robotic system inspired by the biological characteristics of lobsters.

Rolling Bearing Degradation Identification Method Based on Improved Monopulse Feature Extraction and 1D Dilated Residual Convolutional Neural Network.

To address the challenges of extracting rolling bearing degradation information and the insufficient performance of conventional convolutional networks, this paper proposes a rolling bearing degradation state identification method based on the improved monopulse feature extraction and a one-dimensional dilated residual convolutional neural network (1D-DRCNN). First, the fault pulse envelope waveform features are extracted through phase scanning and synchronous averaging, and a two-stage grid search strategy is employed to achieve FCC calibration. Subsequently, a 1D-DRCNN model is constructed to identify rolling bearing degradation states under different working conditions.

Experimental Study on the Preparation of Paste Filling Materials from Coal-Based Solid Wastes.

To reduce the cost of coal mine filling materials, a novel composite cementitious material was developed by utilizing coal-based solid waste materials, including fly ash, desulfurized gypsum, and carbide slag, along with cement and water as raw materials. Initially, a comprehensive analysis of the physical and chemical properties of each raw material was conducted. Subsequently, proportioning tests were systematically carried out using the single-variable method.

Industrial robots reduce carbon emissions in manufacturing through global value chains.

As quintessential representatives of advanced production tools in new-quality productive forces, industrial robots not only empower the intelligent transformation of industries but also align with the development philosophy of green and low-carbon growth. This paper, from the perspective of the manufacturing industry's embeddedness in the global value chain, utilizes world input-output tables and data related to the application of industrial robots to conduct an empirical analysis of the impact and mechanisms by which industrial robot application affects carbon emissions in the global manufacturing sector. The results indicate that the application of industrial robots in manufacturing has a significant carbon emission reduction effect, which remains robust after causal identification using instrumental variables and multiple robustness tests; mechanism analysis reveals that the application of industrial robots can not only optimize the allocation of labor factors through substitution effects but also enhance international competitive advantages, improve the division of labor status, and form a global value chain climbing effect, thereby further increasing the level of carbon emission reduction.

Laser-Tunable Noncontact Triboelectric Nanogenerators: A Novel Approach for Surface Charge Regulation and Enhanced Lifetime.

The output performance of triboelectric nanogenerators (TENGs) largely depends on the density of electrons on the surface of the triboelectric materials, which is usually generated by the direct contact of two solid materials. Here, a novel method is proposed to regulate the surface charges of materials without physical contact. A laser-tunable noncontact triboelectric nanogenerator (LTNC-TENG) is fabricated, enabling the dynamic regulation of the surface states of materials through laser irradiation to optimize the performance of TENGs.

Study on energy evolution and crack propagation of filling mortar-rock at different loading rates.

Shotcrete, as a highly efficient reinforcement material widely used in geotechnical engineering, demonstrates irreplaceable advantages in projects such as tunnel excavation, mine roadway support, and slope protection. However, when shotcrete becomes tightly bonded with rock masses, the energy evolution and crack initiation mechanisms between the two materials exhibit remarkable complexity. Different loading rates significantly alter the internal stress distribution and deformation characteristics within the composite system, thereby influencing the patterns of energy evolution and crack propagation.

Quantum-Size FeS with Delocalized Electronic Regions Enable High-Performance Sodium-Ion Batteries Across Wide Temperatures.

Wide-temperature applications of sodium-ion batteries (SIBs) are severely limited by the sluggish ion insertion/diffusion kinetics of conversion-type anodes. Quantum-sized transition metal dichalcogenides possess unique advantages of charge delocalization and enrich uncoordinated electrons and short-range transfer kinetics, which are crucial to achieve rapid low-temperature charge transfer and high-temperature interface stability. Herein, a quantum-scale FeS loaded on three-dimensional TiC MXene skeletons (FeS QD/MXene) fabricated as SIBs anode, demonstrating impressive performance under wide-temperature conditions (- 35 to 65 °C).

Exposure Risks of Trans-Perfluoro (4-Methyl-2-Pentene) Byproduct in CFO Fire Suppressants: Toxicological Mechanisms and Implications.

CFO fire agent is widely used in various fire extinguishing scenarios due to its excellent properties. The most abundant byproduct in CFO fire extinguishing agent is perfluoro (4-methyl-2-pentene) (CF). Currently, there is a lack of reports on the toxic mechanisms of trans-CF.

Cationic alkyl chain length and nanoaggregate form of ionic liquids dominate biocompatibility and toxicity.

While ionic liquids (ILs) have diverse applications, their potential in biomedical applications remains largely untapped due to gaps in systematic understanding of the spectrum of IL biosafety (biocompatibility/toxicity). Here, we establish an IL library and identify an in vitro reduction in biocompatibility (increased toxicity) with increased ILs' cationic alkyl chain length. Particularly, we present compelling evidence for IL nanoaggregates in aqueous environment, thereby elucidating the mechanisms involved in cell interactions.

Stability and reactivity of food webs with trophic interactions.

Ecosystems are increasingly vulnerable to species extinctions and functional disruptions driven by climate change and anthropogenic pressures. Although significant progress has been made in understanding the stability and reactivity of ecosystems, the influence of functionally distinct species groups remains underexplored. Here, we develop a food web model that incorporates producers, consumers, decomposers, and detritus, effectively capturing key characteristics of real food webs.

A novel image fusion method based on UAV and Sentinel-2 for environmental monitoring.

In recent years, with the rapid development of remote sensing technology, environmental monitoring in mining areas using remote sensing imagery has gained increasing attention. Due to the small scale of mining areas, the resolution of satellite remote sensing imagery is insufficient for detailed monitoring needs. UAV remote sensing imagery provides high resolution, but its monitoring range is limited and lacks access to historical data.

The mechanism of permeability enhancement of coal seams by hydraulic fracturing based on the characterization of coal physical properties.

To further understand the mechanism of pressure relief and permeability enhancement in coal seams through hydraulic punching, this study employs microscopic testing methods such as porosity testing, spectral analysis, and image scanning, combined with simulation techniques, to analyze the impact of hydraulic punching on both the macro- and microstructures of coal from a microscopic perspective. The results indicate that the particle size distribution of the punch samples is similar to that of the original coal and drilled samples, with differences only in the larger particle size range. The impact damage during drilling and punching is mechanical in nature and primarily affects the macro dimensions of the coal.

Excavation methods and stability control strategies for gob-side roadways based on spatiotemporal evolution.

To address the production succession challenges posed by single-wing mining, this study investigates the 5-1081 roadway of the Fenyuan Coal Mine as a representative example. Theoretical analysis and numerical simulation were combined to systematically examine the spatiotemporal relationship between the gob-side roadway and the overlying working face, with a focus on their influence on excavation strategies and surrounding rock deformation. The results indicate that, under a fixed coal pillar width, the adjacent mining and driving scheme significantly enhances surrounding rock stability and reduces succession constraints compared to other methods.

Liquid film thinning-thickening anomaly in electrolyte solutions.

Hypothesis: The distribution of dissolved ions depends largely on the position and shape of air-water interfaces. Following the interfacial interaction, both the surface deformation and reduced separation distance may induce different ion concentrations in liquid film and bulk solutions. The consequent Marangoni effect should change the flow dynamics inside the liquid films and thus influence the film evolution process.

Microwave Curing of FA- and MK-Based Geopolymer Gels: Effects on Pore Structure, Mechanical Strength, and Heavy Metal Leachability.

Microwave curing has proven to be a highly effective method for enhancing the structural integrity, compressive strength, and heavy metal immobilization performance of geopolymer (GP) gels. For fly ash-based GP gels, optimal compressive strength (126.84 MPa) and minimal heavy metal ion leaching (0.

What makes a specialised emergency plan effective?-A case study of railway operation in 33 prefectural cities in China.

Emergency response plans play a crucial role in mitigating safety risks associated with urban rail transport operations and effectively responding to emergencies in underground spaces. This study evaluates and analyzes the emergency response plans for rail transit operations in 33 cities in China, focusing on the consistency and completeness of the plans. The evaluation index system for Urban Rail Transit Operation Emergency Plans (URTOEPs) consists of 9 primary variables and 42 secondary variables, constructed based on the text analysis and the Policy Model Consistency (PMC) index model.

Experimental study on physiological responses during interval exercise and the effects on thermal perception.

The physiological response during interval exercise and its significance in determining thermal perception remain unclear. There is a paucity of quick and convenient thermal perception assessment methods in exercisers, which impedes the advancement of real-time thermal perception evaluation in exercise spaces. In this study, five thermal conditions were set up in a thermal chamber to simulate the thermal environment of a cold region and evaluate the dynamic physiological responses during interval exercise and their effect on temperature perception.

Perceptions and experiences of gratitude among patients with advanced cancer in China: A descriptive phenomenological study.

Objective: Gratitude has been demonstrated to be crucial for cancer patients' overall well-being and coping. However, the existing evidence on this topic is primarily from Western settings. This study aimed to explore how patients with advanced cancer in China perceive and experience gratitude.

Mechanisms and control of large deformation in mudstone roof gob side entry of inclined coal seams with water softening.

The gob-side entry in the inclined coal seams of the Songxinzhuang Coal Mine faces severe deformation under the influence of mudstone roofs water immersion-softened, and the conventional support is invalid. The main conclusions are as follows: (1) This study, through laboratory experiments both the macroscopic (water immersion tests) and microscopic (XRD and SEM) perspectives, reveals that the strength and bearing capacity of the mudstone in the immediate roof will reduce after water immersion softening, which is the root cause of the large deformation of the roadway from. (2) Through theoretical analysis established a stability evaluation system based on the softened friction angle (φ') and the sliding stability coefficient (K), and results showing that the key roof blocks above the gob-side entry become unstable under water-softened conditions.

Thermal Characteristics and Kinetic Insights into CO Regasification of Candle Coal Pyrolysis Residues from Coalfield Fires.

To investigate the regasification thermal characteristics of candle coal pyrolysis residues, thermogravimetric (TG) experiments were conducted using residues subjected to different constant temperatures. Two stages of thermal decomposition were observed in the 300-500 °C range, leading to varying pyrolysis residual structures with a critical transition point of around 400 °C. Fourier transform infrared spectroscopy results indicate that the cleavage of numerous weak chemical bonds during pyrolysis promotes increased aromatization of coal.

Modulating Acidic Oxygen-Containing Functional Groups on Coal-Based Activated Carbon to Enhanced Methane Adsorption and Diffusion.

The key to achieving efficient enrichment of low-concentration coal mine gas via pressure swing adsorption lies in the coordinated modulation of the adsorbent's pore architecture and surface chemical properties. This study examines methane adsorption on coal-based activated carbon modified via preoxidation and controlled KOH activation. At an optimal carbon to alkali ratio of 1:4, the material developed a micropore- and small mesopore-dominated structure, comprising 91.