bluuebunny/crossref_metadata_2025_split huggingface dataset:
Stress corrosion behavior and mechanism of Ti6321 alloy in seawater with different dissolved oxygen concentrations
Authors: Hao Fuyao , Zhang Huixia , Li Xiangbo , Hou Jian , Li Wenju , Xu Yali , Guo Weimin 
Published: August 2024

AbstractThe stress corrosion behavior of Ti‐6Al‐3Nb‐2Zr‐1Mo (Ti6321, in wt%) alloy in seawater with different dissolved oxygen (DO) concentrations was investigated using X‐ray photoelectron spectroscopy, energy dispersive spectrometer, electrochemical measurements, and other advanced methodologies. The results indicate that when the DO concentration in seawater is insufficient, the passivation film will preferentially form on the α‐phase surface. Meanwhile, insufficient DO concentration leads to incomplete oxidation of the surface passivation film, resulting in an increase in surface defects. Hydrogen produced by reactions at crack tips is more likely to enter the surface of the titanium alloy through these defects, and under the influence of HEDE and HELP mechanisms, promote crack propagation.
Adhesion and Cohesion Performance of Polyurethane Made of Bio‐Polyol Derived from Modified Waste Cooking Oil for Exterior Grade Plywood
Authors: Maulana Sena , Setiawan Ika Putri , Pusbanarum Dyah , Antov Petar , Iswanto Apri Heri , Kristak Lubos , Lee Seng Hua , Lubis Muhammad Adly Rahandi 
Published: August 2024

AbstractThis study explored the feasibility of Waste Cooking Oil (WCO)‐based Bio‐Polyurethane (Bio‐PU) as an eco‐friendly alternative to petroleum‐derived polyols in plywood adhesives. The objective is to evaluate the impact of varied WCO concentrations and methylene diphenyl diisocyanate (MDI) levels on Bio‐PU and plywood performance. The Bio‐PU's characteristics, rheology, and functional groups are studied. Plywood made from three layers of 100 mm x 100 mm × 2 mm rubberwood (Hevea brasiliensis) veneer is bonded with Bio‐PU using a dual spread approach at 180 g.m−2, hot pressed at 120 °C and 1 MPa for 4 min. The laboratory‐fabricated plywood is tested for physical, mechanical, and adhesive properties. Results showed that Bio‐PU exhibited unique adhesive characteristics, with excellent adhesive strength, despite a slight decrease with higher WCO concentrations. WCO insertion do not compromise delamination resistance. FTIR analysis confirmed successful polyurethane chain synthesis. This research highlighted the potential of WCO‐based Bio‐PU's as a sustainable, high‐performance plywood adhesive.
Computer Simulations of Responsive Nanogels at Lipid Membrane
Authors: Sorokina Anastasia S. , Gumerov Rustam A. , Noguchi Hiroshi , Potemkin Igor I. 
Published: August 2024

AbstractThe swelling and collapse of responsive nanogels on a planar lipid bilayer are studied by means of mesoscopic computer simulations. The effects of molecular weight, cross‐linking density, and adhesion strength are examined. The conditions for collapse‐mediated engulfing by the bilayer are found. In particular, the results show that at low hydrophobicity level the increase in the nanogel softness decreases the engulfing rate. On the contrary, for stronger hydrophobicity level the trend changes to the opposite one. At the same time, when the cross‐linking density is too low or the adhesion strength is too high the nanogel deformation at the membrane suppresses the engulfing regardless of the network swelling ratio. Finally, for comparative reasons, the behavior of the nanogels is also studied at the solid surface. These results may be useful in the design of soft particles capable of tuning of their elasticity and porosity for successful intracellular drug delivery.
Flaxseed Oil Attenuates Intestinal Damage by Regulating Ferroptosis Signaling Pathway Following LPS Challenge in Piglets
Authors: Guo Junjie , Chen Xiaoqian , Zhou Mohan , Yu Xintian , Zhu Huiling , Xiao Kan , Chen Guoshun , Liu Yulan 
Published: August 2024

ScopeFerroptosis has been demonstrated to play an important role in various tissue injuries and diseases. Flaxseed oil (FO) has been proven to have benefits for intestinal health. This study aims to explore whether FO relieved lipopolysaccharide (LPS)‐induced intestinal injury through modulating ferroptosis signaling pathway.Methods and resultsA total of 120 weaned piglets are fed diets with 3% soybean oil (SO) or 3% FO for 4 weeks. At the end of the trial, 24 piglets selected from two dietary treatment groups are used in a 2 × 2 factorial design with oil treatment (3% SO versus 3% FO) and LPS challenge (saline versus LPS). At 4 h postinjection with LPS, 24 piglets are slaughtered and intestinal samples are collected. FO improves growth performance of pigs. After LPS treatment, FO mitigates intestinal morphological damage and functional damage. Notably, FO reverses the typical ultra‐morphology and biochemical indexes of ferroptosis involving glutathione, malondialdehyde, and 4‐hydroxynonenal contents. Mechanistically, FO ameliorates the changes on mRNA or protein abundance of key ferroptosis signals including transferrin receptor protein 1 (TFR1), recombinant iron responsive element binding protein 2 (IREB2), FTL, HSPB1, ferritin heavy chain 1 (FTH1), ferroportin 1 (FPN1), SLC7A11, solute carrier family 3 member 2 (SLC3A2), glutathione peroxidase 4 (GPX4), and arachidonate‐15‐lipoxygenase (ALOX15).ConclusionsFO improves growth performance and mitigates intestinal structural and functional damage, which is involved in regulating ferroptosis signaling pathway.
Electrocatalytic Properties of Ni1+xFe3−x−yAyN (A = Mo, W): The Effect of Mo and W in the Oxygen Evolution and Hydrogen Evolution Reaction in Alkaline Media
Authors: Coca‐Clemente José A. , Rodríguez‐García Isabel , Tolosana‐Moranchel Álvaro , Gómez de la Fuente José Luis , Ocón Pilar , Retuerto María , Rojas Sergio 
Published: August 2024

ABSTRACTNi, Fe‐based nitrides have been widely studied for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in alkaline media, displaying electrocatalytic activities similar to Pt and other noble metal electrocatalysts. The incorporation of small amounts of Mo or W on these Ni, Fe‐based nitrides is expected to have a significant effect on the electrocatalytic performance of these materials, especially for the HER activity. In this work, transition metal nitrides (TMNs) with the empirical formula Ni1+xFe3−x−yAyN (A = Mo, W), were obtained in two steps: synthesis of the transition metal oxide precursors by an easy, one‐pot sol–gel polymerization method followed by nitridation under ammonia atmosphere to obtain the final TMNs. Their HER and OER catalytic performances in alkaline electrolyte (0.1 M KOH solution) were studied and it was observed that the incorporation of small quantities of Mo or W in these Ni, Fe‐based nitrides (Ni1+xFe3−x−yAyN, where y = 0.1) results in improved HER and OER activities, especially in the TMN that contains W (i.e., Ni1+xFe2.9−xW0.1N), where the overpotentials were 348 mV for OER and 269 mV for HER. These values are lower than those obtained for Ni1+xFe3−xN, which are 395 mV for OER and 368 mV for HER.
Sequentially crosslinked collagen‐based hydrogel to form a semi‐interpenetrating network for enhanced stability to hydrolytic degradation and electrochemical properties
Authors: Nur Hidayah Shahemi , Dania Adila Ahmad Ruzaidi , Sharaniza Ab Rahim , Muhammad Abid Amir , Mohd Muzamir Mahat 
Published: August 2024

AbstractBiodegradable polymers are pivotal in tissue engineering, facilitating long‐term tissue reintegration and reducing the necessity for surgery. However, collagen, a crucial component of the extracellular matrix, encountered challenges due to its limited mechanical strength and rapid in‐vivo degradation. This study addresses these issues through crosslinking and functionalizing collagen with synthetic 4‐arm amine‐terminated polyethylene glycol (PEG) in a semi‐interpenetrating network (IPN) hydrogel. The first goal is to enhance resistance to hydrolysis, thus extending the biodegradation rate. Then, to explore its electrical conductivity properties for certain applications like neural tissue regeneration. The hydrogels were fabricated using sequential IPN formation synthesis where their structural stability and type of degradation by‐products were confirmed using Fourier‐transform infrared spectroscopy (FTIR), Raman spectroscopy, scanning electron microscopy (SEM), and nuclear magnetic resonance (NMR). Next, its mechanical and degradation properties investigations exhibit a 92% enhancement in hardness and a 90% retainment of its initial mass over time under physiological conditions. Additionally, the introduction of polypyrrole (PPy) via in‐situ polymerization increases its electrical conductivity, achieving a remarkable 104‐fold increase at a 0.75 M concentration, attributed to the interconnectivity of PPy chain networks within the three‐dimensional structure of IPN collagen/PEG hydrogel. The increased PPy concentration improves conductivity and reduces energy requirements for redox reactions, ensuring electrochemical stability as revealed by cyclic voltammetry analysis. The demonstrated structural and electrochemical stability of the semi‐IPN collagen/PEG/PPy hydrogel within a physiological environment through a facile sequential crosslinking method underscores its promising practical applications in enhancing clinical effectiveness.
A new simulation method for characterizing the shear behavior of needled carbon fiber composites
Authors: Liu Zinan , Li Piao , Luo Xilin , Liu Wentai , Lu Xing , Liao Dunming , Zhou Helezi , Zhou Huamin 
Published: August 2024

AbstractDue to the complex internal structure of needled carbon fiber composites, the interlayer shear behavior is hard to predict in current simulations. This study proposes a new meso‐level simulation method, which uses double cohesive zone models to account for the additional enhancement of interfacial shear properties during needling. Constitutive models with damage criteria are extended and applied to describe the failure of the nonwoven fabric, short fiber felt, and needled fiber bundles. Short beam shear tests are carried out to obtain experimental shear properties and fracture mechanisms. The predicted load versus displacement relation and damage evolution agree well with the experiments. The errors of interlaminar shear strength and failure displacement between simulations and average values of experiments are 2.597% and 9.452%, respectively, which validate the accuracy of the proposed simulation method.Highlights
The shear failure behavior and evolution of needled composites are simulated on a meso‐level.
Double cohesive zone models characterize the additional enhancement of interlaminar shear properties.
Different modified constitutive models are used for unique components.
The experimental results well verify the validity of the simulation.
Muskrat (Ondatra zibethicus) predation on unionid mussels in the Salmon and Little Salmon rivers in northern New York
Authors: Cooper John E. 
Published: August 2024

AbstractMuskrat (Ondatra zibethicus) predation on unionid mussels has been documented since the late 1800s. More recent studies have examined size‐specific predation and potential effects of predation on mussel populations. This study was part of a larger endeavor that examined the effects of dam removal in the Salmon and Little Salmon rivers in northern New York. Muskrat middens were searched for from 2005 through 2012 and all mussel shells were identified, measured, and evaluated for evidence of muskrat predation. Ten species of consumed mussels were collected from 37 middens. Three species of living mussels that were in low abundance were not found in middens. Distribution of middens was uneven in both rivers and few middens were used in more than 1 year. Muskrats did not consume mussels <37 mm shell length in the Salmon River (SR) and <28 mm in the Little Salmon River (LSR). Shell length distribution of living mussels was similar to that of mussels in middens. Shell length of living SR mussels (based on mean ranks) were significantly longer than living mussels in the LSR as were consumed mussels. Size‐selection may be indicated for Elliptio complanata and Lampsilis radiata but relative abundance might also be a factor. Dry empty shell weight and thickness were not significantly correlated to percent predation marks. The muskrat population in these rivers could be small as few middens were used in more than 1 year and there was no evidence of muskrat trapping. If so, muskrat predation would have a limited effect on the unionid population.
3D Printable Materials Based on Renewable Polymers from Terpene Alcohols and Calcium Carbide
Authors: Lotsman Kristina A. , Samoylenko Dmitriy E. , Rodygin Konstantin S. , Ananikov Valentine P. 
Published: August 2024

AbstractThe transition to a sustainable future requires the use of waste‐free technologies for production. Potentially, additive technologies can be a promising approach for accessing circular economy due to the precise amount of feeding materials and the absence of molds. However, the initial feeding materials for additive approaches are often based on non–renewable hydrocarbon sources. This work focused on the use of polymers derived from terpene alcohols to develop a filament suitable for 3D printing. Initially, the vinylation of menthol using calcium carbide was optimized and scaled up, then a series of terpenyl–based vinyl ethers were obtained under optimal conditions. The cationic polymerization of vinyl ethers was also scaled up and resulted in 99 % yield of the polymers, which was subsequently subjected to hot extrusion. The initial terpenol was used as an additive to increase polymer flexibility. The addition of menthol (30 wt %) to polyvinyl menthol led to the suitable filament. Using the filament, a series of objects were 3D printed at 125 °C. The material demonstrated good sinterability and adhesion to glass and shrinkage comparable to that of commercial 3D printing filaments. Furthermore, the polymers obtained were used as additives to enhance the adhesion of commercially available filaments.
Pyrrole: An Essential Framework in the Development of Therapeutic Agents and Insightful Analysis of Structure‐Active Relationships
Authors: Sahu Bhaskar , Sahu Rakesh , Gidwani Bina , Mishra Achal 
Published: August 2024

AbstractPyrrole is a heterocyclic structure with diverse pharmacophores, enabling the creation of an extensive lead molecule library. Its broad range of pharmacological profiles has concerned significant global research interests. This review highlights recent advancements in pyrrole scaffolds, focusing on their structure active relationship and bioactivities. Pyrrole derivatives recognized for their biological activities, are promising scaffolds for developing antimicrobial, antimalarial, antiviral, antituberculosis, and enzyme‐inhibiting properties. Their unique anti‐inflammatory and antioxidant features have prompted the development of novel cardioprotective and neuroprotective compounds. The review aims to elucidate the SAR of pyrrole mimics, aiding future therapeutic developments.
Anti‐saprolegnia Effect of Oxyprenylated Derivatives of Naturally Occurring Prenylated Dihydrochalcone
Authors: Madrid Alejandro , Silva Valentina , Muñoz Evelyn , Valdés Francisca , Rigano Daniela , Werner Enrique , Montenegro Iván 
Published: August 2024

AbstractOomycetes such as Saprolegnia sp. are responsible for serious economic losses in aquaculture, the strategies for their control lead to concerns about their efficacy and environmental repercussions, so alternatives for their regulation are being sought. The aim of this study was to evaluate the in vitro susceptibility of 2 representative strains of Saprolegnia sp. toward 2,4‐dihydroxy‐5′‐prenyl‐dihydrochalcone (A); dihydrochalcone isolated from the Chilean shrub Adesmia balsamica; and their derivatives oxyprenylated (B‐‐G) with the purpose to develop naturally occurring products in order to cope with emerging resistance phenomena. The minimum inhibitory concentration (MIC) and minimum oomycetocidal concentration (MOC) values were then determined for the series of compounds tested, in comparison with the conventional fungicides bronopol® and fluconazole plus the natural compound safrole, by quantifying fungal growth. Significant growth inhibition was observed for prenylated derivatives B–G, evidencing dihydrochalcone E as the most active. This compound presented MIC and MOC values (0.24–0.26 μM and 0.30–0.33 μM, respectively) superior to those determined for commercial antifungal in both of the tested pathogenic strains.
Long‐Term Stable Dispersion of Multiwalled Carbon Nanotubes by Peroxydisulfate upon Ultrasonication Activation
Authors: He Jinglei , He Xin , Shen Xiaofang , Yan Chuanhao , Yu Xuefeng , Zhang Jinlong , Zhu Benzhan , Huang Chunhua , Liu Junfeng , Wang Xilong 
Published: August 2024

AbstractPoor dispersibility of carbon nanotubes greatly hinders their practical applications. Herein, a long‐term stable dispersion of multiwalled carbon nanotubes (MWCNTs) in peroxydisulfate (PDS) is achieved. MWCNTs at 40 mg L−1 are completely dispersed by PDS upon ultrasonication (US/PDS) within 64 min and a stable dispersion is maintained at least 20 days. Mechanistically, US created defects on the nanomaterial and PDS‐origin free radicals attacked these defects to introduce O‐containing moieties (─OH and ─COOH). Interestingly, dispersion efficiency of MWCNTs by US/PDS initially at pH 7 and 3.8 is comparable, but lower than that initially at pH 12. Both •OH and SO4•− are produced under alkaline condition, while SO4•− is the dominant free radicals initially at pH 7 and 3.8 during the whole dispersion period. Stronger dispersion of MWCNTs initially at pH 12 resulted from greater amounts of O‐containing moieties mainly in ─OH (46.32%) rather than ─COOH (24.19%) form. This differential more strongly promotes MWCNTs‐water interaction via hydrogen bonding, thereby enhancing the dispersion. Notably, no significant mass loss of MWCNTs occurred during dispersion. Overall, the developed method achieves long‐term stable dispersion of MWCNTs in a manner that can significantly extend their applications.
The Role of Rare‐Earth Atoms in the Anisotropy and Antiferromagnetic Exchange Coupling at a Hybrid Metal–Organic Interface
Authors: Blanco‐Rey María , Castrillo Rodrigo , Ali Khadiza , Gargiani Pierluigi , Ilyn Maxim , Gastaldo Michele , Paradinas Markos , Valbuena Miguel A. , Mugarza Aitor , Ortega J. Enrique , Schiller Frederik , Fernández Laura 
Published: August 2024

AbstractMagnetic anisotropy and magnetic exchange interactions are crucial parameters that characterize the hybrid metal–organic interface, a key component of an organic spintronic device. It is shown that the incorporation of 4f RE atoms to hybrid metal–organic interfaces of CuPc/REAu2 type (RE = Gd, Ho) constitutes a feasible approach toward on‐demand magnetic properties and functionalities. The GdAu2 and HoAu2 substrates differ in their magnetic anisotropy behavior. Remarkably, the HoAu2 surface promotes the inherent out‐of‐plane anisotropy of CuPc, owing to the match between the anisotropy axis of substrate and molecule. Furthermore, the presence of RE atoms leads to a spontaneous antiferromagnetic exchange coupling at the interface, induced by the 3d–4f superexchange interaction between the unpaired 3d electron of CuPc and the 4f electrons of the RE atoms. It is shown that 4f RE atoms with unquenched quantum orbital momentum (), as it is the case of Ho, induce an anisotropic interfacial exchange coupling.
Uncovering the Size‐Dependent Thermal Solid Transformation of Akaganéite
Authors: Wang Xiang , He Yang , Liu Lili , Song Duo , Kovarik Libor , Bowden Mark E. , Engelhard Mark , Li Xiaoxu , Du Yingge , Miller Quin RS , Wang Chongmin , De Yoreo James J. , Rosso Kevin M. , Zhang Xin 
Published: August 2024

AbstractInvestigating the structural evolution and phase transformation of iron oxides is crucial for gaining a deeper understanding of geological changes on diverse planets and preparing oxide materials suitable for industrial applications. In this study, in‐situ heating techniques are employed in conjunction with transmission electron microscopy (TEM) observations and ex‐situ characterization to thoroughly analyze the thermal solid‐phase transformation of akaganéite 1D nanostructures with varying diameters. These findings offer compelling evidence for a size‐dependent morphology evolution in akaganéite 1D nanostructures, which can be attributed to the transformation from akaganéite to maghemite (γ‐Fe2O3) and subsequent crystal growth. Specifically, it is observed that akaganéite nanorods with a diameter of ∼50 nm transformed into hollow polycrystalline maghemite nanorods, which demonstrated remarkable stability without arresting crystal growth under continuous heating. In contrast, smaller akaganéite nanoneedles or nanowires with a diameter ranging from 20 to 8 nm displayed a propensity for forming single‐crystal nanoneedles or nanowires through phase transformation and densification. By manipulating the size of the precursors, a straightforward method is developed for the synthesis of single‐crystal and polycrystalline maghemite nanowires through solid‐phase transformation. These significant findings provide new insights into the size‐dependent structural evolution and phase transformation of iron oxides at the nanoscale.
Magnetically Powered Microrobotic Swarm for Integrated Mechanical/Photothermal/Photodynamic Thrombolysis
Authors: Song Yanzhen , Ou Juanfeng , Miao Jiajun , Zhang Xiaoting , Jiang Jiamiao , Tian Hao , Peng Fei , Tu Yingfeng 
Published: August 2024

AbstractCurrent thrombolytic drugs exhibit suboptimal therapeutic outcomes and potential bleeding risks due to their limited circulation time, inadequate thrombus penetration, and off‐target biodistribution. Herein, a photosensitizer‐loaded, red cell membrane‐encapsuled multiple magnetic nanoparticles aggregate is successfully developed for integrated mechanical/photothermal/photodynamic thrombolysis. Red cell membrane coating endows magnetic particles with prolonged blood circulation and superior biocompatibility. Under a preset rotating magnetic field (RMF), the aggregate with asymmetric magnetic distribution initiates rolling motion toward the blood clot interface, and because of magnetic dipole‐dipole interactions, the aggregate tends to self‐assemble into longer, flexible chain‐like microrobotic swarm with powerful mechanical stir forces, thereby facilitating thrombus penetration and mechanical thrombolysis. Moreover, precise magnetic control enables targeted photosensitizer accumulation, allowing effective conversion of near‐infrared (NIR) light into heat and reactive oxygen species (ROS) for thrombus phototherapy. In thrombolysis assays, the weight of thrombi is massively reduced by ≈90%. The work presents a safer and more promising combination of magnetic microrobotic technology and phototherapy for multi‐modality thrombolysis.