Simulation and experiment of leakage and diffusion of natural gas pipelines with different burial depths under different pressures.

In this paper, we studied the diffusion characteristics and distribution patterns of gas leakage in soil from buried natural gas pipelines. The three-dimensional simulation model of buried natural gas pipeline leakage was established using Fluent software. Monitoring points of gas leakage mole fraction were set up at different locations, and the influence of buried depth and pressure factors on the mole fraction and diffusion of leaked gas was analyzed.

The mitigative role of novel aflatoxin-degrading enzymes in diverse broiler performance indicators and gut microbiota following the consumption of diets contaminated with aflatoxins.

Background: This study aims to explore both the toxic effects of aflatoxins (AFs) and the protective effects of degrading enzymes (DE) on broilers exposed to AFs.

Results: The findings reveal that a diet contaminated with 69.15 μg kg of aflatoxin B had significant adverse effects on broilers.

Operando Building of a Superior Interface Hybrid Film Enables Chemomechanically Durable Co-Free Ni-Rich Cathodes.

The Co-free Ni-rich layered cathodes become pivotal to reduce cost and increase benefit toward next-generation Li-ion batteries yet raise a major challenge for their extremely fragile cathode-electrolyte interface (CEI) film. Herein, we report the construction of the Si/B-enriched organic-inorganic hybrid CEI films on LiNiMnO (NM91) with the assistance of tris(trimethylsilyl) borate (TMSB) additive. The hybrid film exhibits superior Young's modulus, mechanical strength, and ductility, which greatly dissipate the microstrain of Co-free Ni-rich cathodes under various states of charge with high structural integrity.

Tuning Thermostability and Catalytic Efficiency of Aflatoxin-Degrading Enzyme by Error-prone PCR.

In our previous work, a recombinant aflatoxin-degrading enzyme derived from Myxococcus fulvus (MADE) was reported. However, the low thermal stability of the enzyme had limitations for its use in industrial applications. In this study, we obtained an improved variant of recombinant MADE (rMADE) with enhanced thermostability and catalytic activity using error-prone PCR.

Structural evolution, photoelectron spectra and vibrational properties of anionic GdGe ( = 5-18) nanoalloy clusters: a DFT insight.

The structural growth of Gd-doped germanium anionic nanoclusters, GdGe ( = 5-18), has been explored quantum chemistry calculations using the mPW2PLYP method and an unprejudiced structural searching technique known as ABCluster. The optimized geometries exhibited that when = 10-14, the structural evolution favors the Gd-linked configuration where the Gd atom as a connector bridges two Ge subgroups, while the Gd atom is encapsulated in a closed cage-like Ge frame when = 15-18. The properties like magnetic moment, charge transfer, relative stability, HOMO-LUMO gap, photoelectron spectra, and infrared and Raman spectra have been predicted.

Structural Evolution, Electronic Structures, and Vibrational Properties of Anionic LuGe ( = 5-17) Clusters: From Lu-Linked to Lu-Encapsulated Configurations.

The structural evolution pattern and electronic properties of Lu-doped germanium anion clusters, LuGe ( = 5-17), have been investigated using a global search method combined with a double hybrid density functional theory and by comparing the theoretical PES spectra with the experimental ones. It is found that, for the structural growth patterns, a Lu-linked configuration is preferred for = 10-14 in which the Lu atom as a linker connects two Ge subclusters and a Lu-encapsulated Ge cage-like motif is preferred for = 15-17. The simulated PES spectra agree with experimental ones, revealing that the current global minimum structures are the true minima.

Study on the growth behavior and photoelectron spectroscopy of neodymium-doped silicon nanoclusters NdSi (n = 8-20) with a double-hybrid density functional theory.

Structural evolution, magnetic moment, and thermochemical and spectral properties of NdSi (n = 8-20) nanoclusters were studied. Optimized structures for NdSi demonstrated that the configuration with quintet ground state prefers Nd-substituted for a Si of the most stable Si (n = 8-11) structure to Nd-linked configuration with Si tricapped trigonal prism subcluster (n = 12-19). Finally, the configuration prefers to Nd-encapsulated into Si cage framework (n = 20).

Correction: Red-emitting phosphors APF:Mn (A = Cs, Rb, K): synthesis, luminescence properties and application in solid-state lighting.

Correction for 'Red-emitting phosphors APF6:Mn4+ (A = Cs+, Rb+, K+): synthesis, luminescence properties and application in solid-state lighting' by Yu Chen et al., Dalton Trans., 2019, 48, 10901-10906.

Electronic and optical properties of a novel fluoroaluminate red phosphor CsNaAlF:Mn with high color purity for white light-emitting diodes.

In this work, a novel fluoroaluminate red phosphor of CsNaAlF:Mn with excellent color purity was fabricated via the introduction of Mn in the octahedral center. The crystal and electronic structures, luminescence properties and optical performances were characterized and investigated in detail. The evidences showed that CsNaAlF:Mn well-crystallized into a single phase with particulate morphology, and the non-equivalent occupation in CsNaAlF resulted in sharp red emissions with improved color purity upon blue light illumination.

Red-emitting phosphors APF:Mn (A = Cs, Rb, K): synthesis, luminescence properties and application in solid-state lighting.

A series of APF:Mn (A = Cs, Rb, K) phosphors with single phases were obtained via a simple ion exchange method. These phosphors can exhibit red emission with a broad excitation band in the blue region. The optimized concentration of Mn in APF:Mn was determined.

Testing of a New Portable Device for Dynamic Bladder Pressure Monitoring.

Objective: To develop a portable dynamic bladder pressure monitoring device for facilitating the monitoring of bladder detrusor pressure in patients with neurogenic bladder (NB) caused by spinal cord injury and further compared the effect with traditional urodynamics devices.

Methods: Portable dynamic bladder pressure monitoring device was implemented by software and hardware. The hardware was mainly composed of seven parts, such as micro liquid pressure sensor, electric bridge amplifying circuit, clock module, SD card storage circuit, liquid crystal display circuit, touch circuit, controller circuit and so on.

Novel red-emitting phosphors AHfF:Mn (A = Rb, Cs) for solid-state lighting.

New red-emitting phosphors AHfF:Mn (A = Rb, Cs) with a single phase have been successfully synthesized via a simple ion exchange method, and their structures and luminescence properties were investigated. It was found that Mn ions in RbHfF and CsHfF who share wide band gaps can possess broad excitation bands in the blue regions and intense red emission with internal quantum yields of 0.556 and 0.