bluuebunny/crossref_metadata_2025_split huggingface dataset:
Soil compaction due to agricultural machinery impact: A systematic review
Authors: Zhang Boxiang , Jia Yanfeng , Fan Haoming , Guo Chengjiu , Fu Juan , Li Shuang , Li Mengyuan , Liu Bo , Ma Renming 
Published: April 2024

AbstractSoil compaction is generally viewed as one of the most serious soil degradation problems and a determining factor in crop productivity worldwide. It is imperative to understand the processes involved in soil compaction to meet the future global challenges of food security. In this work, we used co‐occurring keyword analysis to summarize 3491 papers on soil compaction over the past 40 years, elaborating on the main research focuses such as the causes, influencing factors, and effects of soil compaction on crops, and the mitigation and prevention of soil compaction. This review provides a comprehensive discussion of the effects of soil compaction, including altering soil structure, increasing bulk density (BD) and penetration resistance (PR), and reducing porosity and soil hydraulic properties. Notably, based on the 387 data points of 11 papers about BD, our results demonstrated soil compaction on average, increased BD by 7.6%, 6.9%, and 3.2% in the medium‐, coarse‐, and fine‐textured soils, respectively. Based on the 264 data points of 18 papers, in the 0–30 cm soil layer, compaction increased penetration resistance (by 91% in the coarse‐textured, 84.2% in the medium‐textured, and 8.8% in the fine‐textured soils). Compacted soil limits the access of crop roots to water and nutrients, leading to poor root development and reduced crop productivity. There was a difference in soil compaction sensitivity between the different crops, but crop growth and yield showed an overall worsening trend with increasing degrees of compaction. This review collected data points on 142 crop yields and found that wheat, barley, corn, and soybean yields decreased by an average of 4.1%, 15.1%, 37.7%, and 22.7%, respectively, in the BD range of 1.1–1.8 Mg/cm3 after compaction. Additionally, the effectiveness of different compaction mitigation measures, including natural, tillage, and biological, is systematically discussed. Compared with soil compaction mitigation measures, prevention should be the top priority although there is still a lack of practical prevention methods. Soil conditions and agricultural machinery type are the main factors affecting the risk of soil compaction in the process of soil compaction. Therefore, it is particularly important to optimize the soil working conditions in the field and the type of farm machinery used to reduce the risk of soil compaction. This initiative is pivotal for ensuring sustainable systems for food production and recovering crop productivity from compacted soil.
On solutions of a semilinear measure‐driven evolution equation with nonlocal conditions on infinite interval
Authors: Wu Jiankun , Fu Xianlong 
Published: April 2024

AbstractThis paper studies the existence and asymptotic properties of solutions for a semilinear measure‐driven evolution equation with nonlocal conditions on an infinite interval. The existence result of the solutions for the considered equation is established by Schauder's fixed point theorem. Then, the asymptotic stability of solutions is further proved to show that all the solutions may converge to the unique solution of the corresponding Cauchy problem. In addition, under some conditions the existence of global attracting sets and quasi‐invariant sets of mild solutions is investigated as well. Finally, an example is provided to illustrate the applications of the obtained results.
The lived experience of mothers living with fibromyalgia syndrome: A phenomenological inquiry
Authors: Lo Monaco Marika , Alblooshi Sharifa , Mallaci Bocchio Raffaella , Natoli Giuseppe , Landa Maria Luisa , Corrao Salvatore 
Published: April 2024

AbstractIntroductionFibromyalgia syndrome (FMS) is a complex chronic pain condition that negatively impacts women's daily lives, particularly their roles as mothers and wives. A phenomenological qualitative study was conducted to explore the lived experiences of motherhood and daily life among women diagnosed with fibromyalgia.MethodsA sample of 10 women affected by FMS was recruited between January and February 2020. Participants were interviewed in a face‐to‐face, in‐depth interview using a semi‐structured interview guide. Data were collected until saturation, and Colaizzi's method was used to analyse data.ResultsThis qualitative analysis identified five themes: A trauma preceding diagnosis, Pervasive feelings of misunderstanding, A struggle to maintain strength among limitations, Challenges in fulfilling maternal roles, and Persistent sexual discomfort. The latter two themes emerged as the most prominent.ConclusionThese findings highlight the significant impact of fibromyalgia on women's family lives and suggest the need for a more comprehensive care programme.
Network design with vulnerability constraints and probabilistic edge reliability
Authors: Arslan Okan , Laporte Gilbert 
Published: April 2024

AbstractThe network design problem with vulnerability constraints and probabilistic edge reliability (NDPVC‐PER) is an extension of the NDPVC obtained by additionally considering edge reliability. We consider the design of a telecommunication network in which every origin‐destination pair is connected by a hop‐constrained primal path, and by a hop‐constrained backup path when certain edges in the network fail. The edge failures occur with respect to their reliability, and the network is designed by considering a minimum reliability level. Therefore, a hop‐constrained backup path must be built by considering all simultaneous edge failures that have a certain probability of realization. While there exist models to solve the NDPVC without enumerating all edge subsets, edge reliability cannot be dealt with by applying the techniques applied to the NDPVC. Therefore, we develop models based on a new concept of resilient length‐bounded cuts, and solve the NDPVC‐PER without edge set enumerations. We perform extensive testing of the model to determine the best performing settings, and demonstrate the computational efficiency of the developed model. Our findings on these instances show that, in the dataset considered in this study, increasing the reliability level from 90% to 95% increases the average cost only by 12.4%, while increasing it from 95% to 99% level yields a cost increase of 93.9%.
Clinical analysis of air‐leak syndrome following allogeneic hematopoietic stem cell transplantation in pediatric patients
Authors: Zhao Wei , Wang Rong , Chen Man 
Published: April 2024

AbstractBackgroundAir‐leak syndrome (ALS) is considered as an independent risk factor for poor prognosis in adult patients who had received hematopoietic stem cell transplantation (HSCT), and the 5‐year overall survival (OS) of ALS is less than 30%. However, the clinical features of ALS among post‐transplant pediatric patients have rarely been explored.ProceduresWe retrospectively reviewed 2206 pediatric patients who had received an allo‐HSCT between January 2013 and December 2019 at the Hebei Yanda Lu Daopei Hospital, and analyzed the role of ALS in prognosis following HSCT.ResultsIn our research, ALS was divided into two categories: 15 cases of bronchiolitis obliterans syndrome (BOS) and 13 cases of idiopathic pneumonia syndrome (IPS). Following treatment of the ALS, 18 patients survived (18/28, 64.3%), and 10 patients died of respiratory failure or infection (10/28, 35.7%).ConclusionsThe OS of ALS in Hebei Yanda Lu Daopei Hospital is significantly higher than others, and they were cited to be related to early diagnosis and timely FAM treatment in previous reports.
Influence of sodium hydroxide, silane, and siloxane treatments on the moisture sensitivity and mechanical properties of flax fiber composites
Authors: Rothenhäusler Florian , Ouali Ahmed‐Amine , Rinberg Roman , Demleitner Martin , Kroll Lothar , Ruckdaeschel Holger 
Published: April 2024

AbstractNatural fibers are a sustainable alternative to synthetic fibers due to their high weight‐specific Young's moduli and strengths. However, the mechanical properties of natural fibers are very sensitive to their moisture content. Therefore, chemical treatments are often applied to natural fibers to lower their water absorption and enhance fiber‐matrix interaction. The aim is to study the effects of fiber modifications with sodium hydroxide, silane, and siloxane on the water uptake and tensile properties of flax fiber composites produced via prepreg technology. In addition, the effect of moisture on the composites' tensile properties was investigated by conditioning one part of the tensile specimens according to DIN EN 2823 (at 70°C and 85% relative humidity). The NaOH treatment was the only modification that had positive effects on the Young's modulus and tensile strength in the unconditioned and conditioned state. The increase of the tensile modulus and strength are most likely due to changes in flax fiber composition, crystallinity of the cellulose and the rougher fiber surface of NaOH modified fibers. This shows that chemical treatment of natural fibers may improve the performance level of natural fiber composites and prevent a loss in their mechanical properties in humid environments.Highlights
Flax fiber modifications with sodium hydroxide, silane, and siloxane.
Flax fiber composite production via prepreg technology.
Water uptake after conditioning at 70°C and 85% relative humidity.
Tensile tests before and after conditioning.
SEM images of modified flax fibers.
Development of high‐performance zinc stannate based multifunctional thermoplastic polyurethane nanocomposite films
Authors: Rana Bharti , Joshi Mangala , Butola Bhupendra Singh , Ali S. Wazed 
Published: April 2024

AbstractA lot of demand exists for multifunctional TPU that can provide enhanced performance to address a variety of inflatable application needs. To develop multifunctional nanocomposite films for such uses, synthesized zinc stannate (ZnSnO3) nanoparticles are integrated for the first time in a thermoplastic polyurethane (TPU) matrix. ZnSnO3 was synthesized using hydrothermal method. The morphological analysis vividly displayed the nanocubic structures. As‐synthesized nano ZnSnO3 was added as a nanofiller at varied concentration from 2 to 10 wt% in TPU and nanocomposite films were prepared by solvent intercalation and casting method. These films were thoroughly examined for their multifunctional properties such as UV protection, helium gas barrier and infrared emissivity. Mean value of UV protection factor was improved by 75% at 10 wt% loading of ZnSnO3 whereas 23% improvement was observed in helium gas barrier. Moreover, a good correlation of experimental data with various theoretical models of gas permeability was obtained at lower volume fraction of ZnSnO3. IR emissivity value also showed improvement from 0.802 to 0.842. Thus, the developed TPU‐ZnSnO3 nanocomposite films exhibited a significant improvement in multiple functional properties with improved tensile strength at optimized loading of 6 wt% of ZnSnO3.Highlights
UPF mean value of ZnSnO3 incorporated TPU film has been improved by 67%.
Helium gas barrier has been improved by approximately 23% at 6 wt% loading.
TPU film exhibited improved properties at optimized loading of 6 wt% of ZnSnO3.
Nanocomposite TPU film can be employed in various weathering inflatables.
Mechanical properties and functionalization of Graphene oxide‐Thermoplastic polyurethane polymer composites regulated by internal microstructure: From disorder arrangement to nacre‐like laminated structure
Authors: Wen Zhen , Zheng Yihao , Wang Wei , Li Yongcun , Wang Zhiyong , Luan Yunbo 
Published: April 2024

AbstractGraphene oxide (GO) is a two‐dimensional material known for its exceptional mechanical, chemical and electrical characteristics. Here, the mechanical properties and functionalization of GO reinforced thermoplastic polyurethane (TPU) polymer composites with GO content ranging from low to high were investigated. It shows that the GO can mix with TPU in any proportion. The microstructure changed from disorder arrangement to a regular nacre‐like staggered structure, accompanied by different kinds of internal defects as the content increases, resulting in multiple peaks in the tensile properties of composite materials. The tensile strength of composites containing 80 wt% GO is 194% higher than that of pure TPU. This result is closely related to the changes in internal microstructure arrangement, the corresponding stress distribution and the transformation of damage mechanisms. Simultaneously, it shows that the composites exhibited shape memory function at low GO content of 1.5 wt% with about 100% shape recovery at 70°C, and electrical conductivity and deicing function at high GO content of 80 wt% after chemical reduction, which can reach a temperature of 107°C at 10 V AC. These findings will help to comprehensively understand the structural and functional integration design of GO reinforced polymer composites.Highlights
Mechanical properties and functionalization of GO/TPU composites were studied.
Increased GO causes the arrangement to change from disorder to a nacre‐like structure.
Stress distribution and damage mechanisms transformed as the GO content changed.
The GO/TPU composites exhibited shape memory and deicing function.
Improve the thermal properties of oil‐loaded polysulfone microcapsules by optimizing copper layer for self‐lubricating polyamide
Authors: Li Haiyan , Wang Jiayu , Li Xin , Dong Shuzhen , Shi Nanqi , Li Zhike 
Published: April 2024

AbstractThis work reports polymer/metal double‐shell microcapsules with polysulfone (PSF) and copper as walls for application in self‐lubricating polymer. First, polyalphaolefin 40 (PAO40) was selected as lubricant oil, and PAO@PSF single shell microcapsules were prepared. A critical issue for the formation of copper layer is the sensitization of PSF shell, which can affect not only the adhesion between PSF shell and copper layer, but also the density of copper layer. The sensitization conditions were discussed in detail, and the corresponding effect on the formation of copper layer was evaluated. PAO@PSF/Cu microcapsules obtained under optimal sensitization condition were characterized by scanning electron microscopy (SEM), thermogravimetric analyzer (TGA), x‐ray energy dispersive spectrometer (EDS) and fourier transform infrared spectroscopy (FTIR). A uniform and compact copper layer improved the thermal properties of microcapsules. PSF/Cu microcapsules maintained relatively complete spherical shape when were heated to 300°C, while the PSF microcapsule softened and deformed at 200°C. The self‐lubricating polyamide 6(PA6) composites containing PAO@PSF/Cu microcapsules were fabricated at 230°C, microcapsules maintained complete structure and uniform distributed in the polymer matrix. Coefficient of friction (COF) and wear rate of PA6 composites were tested under different friction conditions. Compared with pure PA6, 15 wt.% PAO@PSF/Cu microcapsules could reduce the COF by 79.5%, and the wear rate was decreased by 98.3% under 300 rpm sliding speed and 50 N friction load.Highlights
PSF/Cu double‐shell oil‐loaded microcapsules were designed and prepared.
The copper layer effectively improved the thermal properties of microcapsules.
The self‐lubricating PA6 composite exhibited excellent tribological properties.
Effect of functional fillers in solvent‐free polyurethane adhesives: Processing and characterization
Authors: Khemakhem Marwa , Le Rouzic Clara , Brosset Marion , Mani Skander , Fontaine Alexandre , Romano Angela , Ibarra‐Gómez Rigoberto 
Published: April 2024

AbstractThe present work is focused on the study of polyurethane adhesives in the presence of functional fillers (encapsulated enzymes) intended to make them degradable. This is part of a general strategy aiming to recycle multilayer films for packaging, at their end of life, by means of separating the constituent layers as a result of adhesives degradation. Primarily, it was found that the presence of small quantities of functional filler greatly affects both, the quality of the coating process and the kinetics of the adhesive curing. The former, because of the dependency on particle size distribution, leads to high variations in thickness and mechanical properties of multilayers and, the latter, because of a significant catalytic effect (higher curing rates). Indeed, an assessment of the adhesives' kinetics by rheology showed that the pot‐life and the cross‐over point (G′ = G″) for the enzyme‐containing system were obtained three times faster in comparison to the control formulation. These findings were also confirmed by differential scanning calorimetry measurements. On the other hand, by reducing and homogenizing the filler's particle size using separated sieved material (≤50 μm), improvements in coating control as well as in the quality and final properties of the multilayers were evidenced.Highlights
Recycling multilayer plastic films for flexible packaging.
Encapsulated enzymes to degrade the polyurethane adhesive in specific conditions.
The presence of functional fillers affects the coating process.
Process optimization to ensure the coating quality control.
Heteroatom decorated polythiourethane sorbent for copper (II) extraction in wastewater treatment
Authors: Aurangzeb Noshaba , Zulfiqar Sonia , Khosa Muhammad Kaleem , Slovák Václav , Maamoun Ahmed Abdelhamid , Forrester Michael , Sarwar Muhammad Ilyas , Cochran Eric W. 
Published: April 2024

AbstractCopper ions in wastewater present substantial environmental hazards, toxic to aquatic species and prone to bioaccumulation. Addressing this, we present a novel cross‐linked polythiourethane (C‐PTU) as a promising chelating adsorbent for the effective removal of copper ions from wastewater. A new monomer, 5‐(2,2,2‐trifluoroacetamide) benzene‐1,3‐bis(carbonyl) isothiocyanate (TFA‐ITC), was synthesized and further condensed with a 1,4‐butane diol to produce a trifluoroacetamide functionalized polythiourethane (TFA‐PTU) and subsequently generating amine functionalized polythiourethane (A‐PTU). The cross‐linking reaction was carried out through amino groups present on the polymer backbone with terephthaloyl chloride, resulting in the formation of C‐PTU. The monomer and polymers underwent characterization using Fourier transform infrared, 1H, and 13C nuclear magnetic resonance spectroscopy, with X‐ray diffraction analyzing the resin's chain alignment. Thermogravimetric and differential scanning calorimetry assessed C‐PTU's thermal properties. The adsorption process for Cu(II) ions was studied using atomic absorption spectroscopy, optimizing conditions for maximal uptake. Results revealed that C‐PTU exhibited a significant adsorption capacity for Cu(II) ions, reaching 67% after a 2 h contact time, with optimal adsorption occurring at pH 6. The Langmuir adsorption isotherm described the sorption mechanism, indicating favorable monolayer cation adsorption via coordination with donor sites on C‐PTU. This research presents a viable solution for copper ion contamination in wastewater, illustrating C‐PTU as an efficient, environmentally friendly adsorbent, marking progress toward cleaner water resources.
The effect of filler loading, biological treatment, and bioplastic blend ratio on flexural and impact properties of blended bioplastic reinforced with spent coffee ground
Authors: Boey J. Y. , Kong U. , Lee C. K. , Lim G. K. , Oo C. W. , Tan C. K. , Ng C. Y. , Azniwati A. A. , Tay G. S. 
Published: April 2024

AbstractIn this study, the mechanical and morphological characteristics of poly(hydroxyalkanoate) (PHA)/poly(lactic acid) (PLA) blend matrix reinforced with spent coffee ground (SCG) were investigated across various weight ratios (100/0, 75/25, 50/50, 25/75, and 0/100) and SCG contents (10–40 wt%). SEM micrographs revealed a phase‐separated structure with cracks on the fracture surface, consistent with the lower flexural properties of biocomposites. The incorporation of SCG reduced mechanical properties, mainly due to its incompatibility with the PHA/PLA matrix. Biocomposites with high SCG content demonstrated lower energy absorption capabilities, likely due to SCG aggregates acting as stress concentrators and disrupting load‐transferring mechanisms. Moreover, increasing PHA content in the blends led to higher PLA crystallinity, as PHA acted as a nucleating agent for PLA. For biological treatment, biocomposites with PHA/PLA ratio (50/50) and SCG loading (20 wt%) were employed. The microscopic analysis highlighted well‐dispersed treated SCG within the matrix and improved interfacial contact. Biocomposites with treated SCG demonstrated remarkable enhancements of 52% and 113% in flexural strength and modulus, respectively. These findings proved the effectiveness of sustainable fungal treatment in enhancing interfacial adhesion and improving the mechanical performance of biocomposites.Highlights
Percentage of SCG in bioplastic blend as a significant effect on the flexural properties and impact strength.
The ratio of the bioplastic blend has the strong influence on the flexural properties and impact properties.
Biological treatment of SCG has improved the interfacial interaction between SCG and bioplastic blend.
The treated SCG has rougher surface which facilitates the interfacial locking between bioplastic blend and treated SCG.
The biological treatment of SCG has improved the mechanical properties of the composites.
High‐performance, semi‐bio‐based degradable epoxy resins and their application to recyclable carbon fiber composites
Authors: Yu Shuanghong , Xiao Kaixuan , Wang Zhaodi , Xu Yahong , Ni Nannan , Hu Dongyuan , Lyu Zhiyi , Kim Soochan , Yang Xin 
Published: April 2024

AbstractEpoxy resins containing dynamic covalent networks enable recycling of carbon fiber composites. However, the simultaneous realization of high performance and mild condition recycling of composites is still a challenge. In the present work, we mixed citric acid epoxy resin with bisphenol A epoxy resin to form a hybrid resin (DER) that meets the requirements of medium temperature curing epoxy resin, and prepared a carbon fiber reinforced resin composite material (DER@CF) that can rapidly degrade and recycle carbon fibers under mild conditions. The Tg of the DER was 125.67 °C, and the tensile strength (79.63 MPa) was comparable to that of the bisphenol A epoxy resin (79.90 MPa). It degraded rapidly after 2 h in ethylene glycol solution at 120 °C. The tensile strength of DER@CF was 825 MPa, and clean fibers could be obtained after 8 h of treatment in ethylene glycol solution at 120 °C. The results of SEM, Raman and tensile tests showed that the recycled fibers were similar to the original fibers in terms of morphology, chemical structure and mechanical properties. © 2024 Society of Chemical Industry.