Linear elastic iterative method for stability ultimate capacity of equal-leg angle towers.

An efficient linear elastic iterative method is proposed for the stability ultimate capacity of equal-leg angle towers, using an elastic modulus adjustment strategy in this paper. The angle steel stability generalized yield function (GYF) of AS/NZS4600 is selected, on which a precise homogeneous generalized yield function (HGYF) is developed through dimensionless analysis and regression. Based on the HGYF, the element bearing ratio is proposed as a dynamic threshold for distinguishing high-stress and low-stress elements in equal-leg angle elements.

Resonance light scattering combined with miniaturized Thermal-Assisted Purge-and-Trap device for screening of hydrochloride drugs.

Resonance Light Scattering (RLS) is a sensitive analytical technology hindered by its susceptibility to impurities in complex samples. This study introduces a combination of RLS with a high-efficiency sample preparation device, the Miniaturized Thermal-Assisted Purge-and-Trap (MTAPT), enhancing RLS's effectiveness in complex sample analysis. Specifically, we utilized MTAPT-RLS for the indirect screening of illegal hydrochloride drug additions in health products, based on three considerations: the transformation of bound HCl in hydrochloride drugs into volatile HCl under strong acid and heat; the minimal Cl content in health products for taste purposes; and the detectability of Cl ions by RLS upon the addition of AgNO and a stabilizer.

Synergistic Effect of Anchoring Transitional/Interstitial Sites on Boosting Structural and Electrochemical Stability of O3-Type Layered Sodium Oxides.

O3-type layered oxides are considered promising cathode materials for next-generation high-energy-density sodium-ion batteries (SIBs). However, they face challenges, such as low rate capacity and poor cycling stability, which arise from structural deformation, sluggish Na diffusion kinetics, and interfacial side reactions. Herein, a synergistic substitution strategy for transitional and interstitial sites was adopted to improve the structure stability and Na diffusion kinetics of the O3-type NaNiFeMnO.

Optimization of Variable-Temperature Pressure-Difference Puffing Drying Process for Persimmon Chips Using Response Surface Methodology.

This study focused on persimmons and applied variable-temperature pressure-differential puffing drying to produce persimmon chips. The effects of puffing pressure, holding time, drying temperature, and duration on moisture content, crispness, and sensory scores were examined. The optimal parameters determined via response surface methodology were a pressure differential of 0.

Impact of Temperature and Substrate Type on the Optical and Structural Properties of AlN Epilayers: A Cross-Sectional Analysis Using Advanced Characterization Techniques.

AlN, with its ultra-wide bandgap, is highly attractive for modern applications in deep ultraviolet light-emitting diodes and electronic devices. In this study, the surface and cross-sectional properties of AlN films grown on flat and nano-patterned sapphire substrates are characterized by a variety of techniques, including photoluminescence spectroscopy, high-resolution X-ray diffraction, X-ray photoelectron spectroscopy, ultraviolet photoelectron spectroscopy, and Raman spectroscopy. The results indicate that different sapphire substrates have minimal impact on the photoluminescence spectrum of the epitaxial films.

Preparation of biomass-derived red emission carbon dots for real-time and long-term tracking of cells and tumor growth.

Effective real-time cell tracking and tumor growth monitoring are important for precise diagnosis and therapy of tumors and can also be used to monitor biological processes. In this study, a facile, green microwave method was developed to synthesize biomass-derived red emission carbon dots (RCDs) using the ethanolic extract of holly leaves. Owing to the advantages of the prepared RCDs, such as near infrared emission, stability, strong fluorescence intensity, excellent biocompatibility, penetration of thick tissues, avoiding background fluorescence interference, and improvement of the signal-to-noise ratio of biological imaging, they were applied to cell imaging, real-time cell tracking and tumor growth monitoring.

Structural and functional properties of proteins isolated from four species of microalgae and their application in air-water interface stabilization.

Herein, we extracted proteins from four microalgae: Chlamydomonas reinhardtii (CHR), Euglena gracilis (EUG), Spirulina platensis (SPP), and Spirulina maxima (SPM). Subsequently, their physicochemical and functional properties, as well as air-water interface adsorption behavior were investigated. Results demonstrated that the solubility and emulsifying properties of these proteins were significantly affected by pH, with minimum values observed near their isoelectric point (3.

Effect of and Cinnamon Essential Oil Nanoemulsion Coatings on the Preservation of Plant-Based Meat Analogs.

Plant-based meat analogs (PBMAs) are promising sustainable food sources. However, their high moisture and protein contents make them prone to microbial deterioration, limiting their shelf life and sensory appeal. This study explored enhancing PBMAs' shelf life using nanoemulsions of and cinnamon essential oils, emulsified with chitosan and Tween 80.

Zinc Oxide Nanoparticles Treatment Maintains the Postharvest Quality of Litchi Fruit by Inducing Antioxidant Capacity.

Pericarp browning and fruit decay severely reduce the postharvest quality of litchi. Improving the antioxidant capacity of the fruit is an effective way to solve these problems. In our study, the appropriate zinc oxide nanoparticles (ZnO NPs) treatment and its mechanism of action on the storability of litchi was investigated.

Hydrophobic and Elastic Structural Triboelectric Materials Enabled by Template Method toward Real-Time Material Recognition.

Since each material has a unique ability to lose or obtain electrons, specific triboelectric signals are produced when triboelectric materials are in contact with different objects. Triboelectric nanogenerator (TENG) devices show great potential for use as tactile sensors; nevertheless, analyzing the structure-function relationship of functionalized triboelectric sensing interfaces under environmental conditions and improving the sensing stability and accuracy through the design of hydrophobic structure on the triboelectric material surface remain major challenges in the development of intelligent sensing networks. Compared with the traditional rigid micronanostructure, the elastic micronanostructure strategy is applied to achieve both hydrophobicity and stability of triboelectric materials based on the template method in this work.

Beyond the walls of the classroom: the psychodynamics of professional commitment and job involvement among female primary school teachers.

This research used structural equation modeling (SEM) to explore the relationship between professional commitment, self-efficacy, psychological resilience, perceived organizational support and job involvement of female teachers in Chinese primary schools. The purpose of the study was to understand how these psychological and organizational factors work together on teachers' job involvement. Based on the questionnaire survey of 596 female teachers in primary schools, the data were collected and analyzed by AMOS software.

Reducing the oil absorption and oil deterioration in fried apple slices by ultrasound integrated in infrared frying.

The effects of integrated ultrasonic infrared frying (USIF) on the oil absorption of apple slices and the oil deterioration were studied with frequency of 28 and 40 kHz, respectively. Results showed that the heat transfer and moisture migration was accelerated by the integrated ultrasound in IF. The soluble Gal-A content and esterification degree of pectin was increased, the damages of pectin crystal structure and chemical structure in side chain was aggravated.

A mitochondria-targeted colorimetric and NIR ratiometric fluorescent probe for biothiols with large Stokes shift based on thiol-chromene click reaction.

In this study, a carbazole-based mitochondria-targeted colorimetric and NIR ratiometric fluorescent probe 1 for biothiols based on the thiol-chromene click reaction was subtly designed and synthesized. Upon interaction with biothiols (Cys, Hcy and GSH), the absorption of 1 shifted from 496 nm to 388 nm, while its fluorescence spectrum shifted from 650 nm to 530 nm. These transformations were accompanied by a visible color change from pink to colorless under visible light and from red to green when observed under a 365 nm UV lamp, which can be attributed to the click reaction of biothiols with the α,β-unsaturated ketone of the chromene moiety, subsequent pyran ring-opening and phenol formation as well as 1,6-elimination of a -hydroxybenzyl moiety yielding 2.

Mitochondria-Targeted NIR Ratiometric and Colorimetric Fluorescent Probe for Biothiols Based on a Thiol-Chromene Click Reaction.

In this work, a mitochondria-targeted NIR ratiometric and colorimetric fluorescent probe was tactfully designed and synthesized by a novel design strategy of modifying chromene to pyridine for the first time. exhibited a maximum absorption peak at 508 nm and a maximum fluorescence emission peak at 650 nm. Under the stimulus of biothiols (cysteine (Cys), homocysteine (Hcy), and glutathione (GSH)), the maximum absorption and fluorescence emission peaks of blue-shifted to 448 and 541 nm, respectively, along with color changes from red to yellow under visible light and from red to green under a 365 nm ultraviolet (UV) lamp, which can be ascribed to the click reaction of biothiols with the α,β-unsaturated ketone of the chromene moiety with pyran ring-opening, phenol formation, and 1,6-elimination of the -hydroxybenzyl moiety.

Dihydrotetrazine-Functionalized Zirconium-Based Metal-Organic Frameworks for High-Capacity Oil Denitrogenation.

High structural stability, dual organic-inorganic nature, and tunability in chemical functionality are promising characteristics of zirconium-based metal-organic frameworks (Zr-MOFs). These properties assist Zr-MOFs in extending their applications in various fields, especially adsorptive removal of pollutants. In this work, two well-known Zr-MOFs (UiO-66(Zr) and MIL-140(Zr) with the formula ZrO(OH)(BDC), HBDC is benzene 1,4-dicarboxylic acid) were synthesized and decorated with a dihydrotetrazine functional group through postsynthesis linker exchange (PSLE).

Mixed-Linker Zr-Metal-Organic Framework with Improved Lewis Acidic Sites for CO Fixation Reaction Catalysis.

Applying the mixed-linker strategy in synthesizing metal-organic frameworks (MOFs) has drawn considerable attention as a heterogeneous catalyst owing to their easy synthesis and different functional ligands in their frameworks. Following this strategy, we have developed a mixed linker Zr(IV)-based MOF, [ZrO(OH)(FUM)(PZDC-NO)] (PZDC-NO = 4-nitro-3,5-pyrazoledicarboxylic acid, FUM = fumaric acid) denoted as MOF-801(PZDC-NO) synthesized via this strategy which possess an electron-withdrawing group (-NO) on secondary linkers. The MOF-801(PZDC-NO) has been fully characterized via various analyses, such as Fourier transform infrared, powder X-ray diffraction, C/H nuclear magnetic resonance, XPS, TGA, and N adsorption/desorption, SEM, EDX, etc.

Study on microscopic pores and physico-mechanical properties of red clay modified by calcium carbonate.

Red clay as a special soil has a high liquid-plastic limit, water swelling and water loss shrinkage. To solve the problems red clay was modified by calcium carbonate produced in Hezhou, Guangxi. The Liquid-plastic limit, water loss shrinkage, nuclear magnetic resonance (NMR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and consolidated drained (CD) triaxial shear test were carried out on the modified soils.

Research on the Motion Control Strategy of a Lower-Limb Exoskeleton Rehabilitation Robot Using the Twin Delayed Deep Deterministic Policy Gradient Algorithm.

The motion control system of a lower-limb exoskeleton rehabilitation robot (LLERR) is designed to assist patients in lower-limb rehabilitation exercises. This research designed a motion controller for an LLERR-based on the Twin Delayed Deep Deterministic policy gradient (TD3) algorithm to control the lower-limb exoskeleton for gait training in a staircase environment. Commencing with the establishment of a mathematical model of the LLERR, the dynamics during its movement are systematically described.

Effects of starch-tea polyphenol complexes on the structure features of reconstituted doughs and oil absorption of potato crisps.

The structural features of reconstituted doughs play a crucial role in determining the oil uptake properties of fried potato crisps. Wheat starch (WS), corn starch (CS), potato starch (PS), or tapioca starch (TS) and tea polyphenols (TPs) complexes were prepared, and their effects on the physicochemical and structural properties of reconstituted dough and oil uptake of potato crisps were investigated. A denser and consistent network structure was observed in the reconstituted dough produced by PS-TPs and TS-TPs complexes.

Thiol-chromene click reaction-triggered mitochondria-targeted ratiometric fluorescent probe for intracellular biothiol imaging.

Chromene as the efficient biothiol recognition site was widely used to develop fluorescent probes based on thiol-chromene click reaction. However, chromene-based fluorescent probes with the both properties of ratiometric measurement and mitochondria-targeted function have not been reported and remain challenging. In this paper, we skillfully designed and synthesized the first mitochondria-targeted ratiometric fluorescent probe (Probe 1) for biothiols based on chromene.

Characterization of the daucosterol-lecithin complex and its impact on lipid metabolism in hyperlipidemic mice.

This investigation delves into the daucosterol-lecithin complex (DS-LC) and its effects on lipid homeostasis in hyperlipidemic mice. DS-LC was assessed for complexation efficiency, physicochemical properties (UV, XRD, FTIR, SEM, DSC), and its impact on organ health and serum lipid levels. The results revealed that daucosterol formed an effective complex with lecithin at a 2 : 1 ratio, producing a translucent beige DS-LC with distinctive aggregation.

High-Performance Tunable Near-Infrared Emitters of Cr-Activated Garnet Phosphor Enabled by Chemical Unit Co-Substitution.

The escalating demand for portable near-infrared (NIR) light sources has posed a formidable challenge to the development of NIR phosphors characterized by high efficiency and exceptional thermal stability. Taking inspiration from the chemical unit co-substitution strategy, high-performance tunable (Lu Ca)(Ga Ge)O:6%Cr (x = 0-3) phosphors are designed with an emission center from 704 to 780 nm and a broadest full width at half maximum (FWHM) of up to 172 nm by introducing Ca and Ge ions into the garnet structure. In particular, LuGaO:6%Cr demonstrates an anti-thermal quenching phenomenon (I = 113.

Corrigendum: A novel approach for sports injury risk prediction: based on time-series image encoding and deep learning.

[This corrects the article DOI: 10.3389/fphys.2023.