Breakdown Of Structure Research Articles

Romanian transnational families: insights from a qualitative study on care workers

PurposeAn increasing number of international immigrant workers enter the EU labour market to fill the gap in many key economic sectors. Labour migration often implies a process of family adaptation and, in some cases, a breakdown in the community structure and networks. This study aims to provide insights into the dynamics of transnational families, focusing on changes in the redefinition of roles within family members and children care arrangements.Design/methodology/approachThe study was based on the analysis of 12 biographical interviews conducted using semi-structured interviews between November 2018 and December 2019 among Romanian women who worked as caregivers in families in an Italian metropolitan city and the surrounding urban area.FindingsDespite the economic dimension being essential, psychological well-being increasingly burdens workers’ migratory experience and that of their family members. Findings suggest including employers and children among the actively involved actors of the family decision-making process; working and contractual conditions as factors that significantly impact the opportunities and capability of workers to provide and receive care, mainly if the latter are employed in the informal market.Originality/valueThe study makes it possible to highlight that the dynamics in decision-making processes in transnational families change in the different phases of the migration project and involve numerous actors. These processes are not always rational and are strongly influenced by the labour market structure in which migrants are employed.

Decomposition behaviors of CO2 hydrate sandwiched in double-symmetrical flat system:A molecular dynamics simulation study

Sequestration of carbon dioxide (CO2) in the form of hydrate is considered to be an effective way to achieve carbon emission reduction. The replacement method of nature gas hydrates with CO2 has been proved to be a very promising technique as well. A precise acknowledge of the decomposition characteristics of CO2 hydrate in porous media, which will help further implement these applications. In this work, molecular dynamics simulation method is employed to investigate the whole decomposition process of CO2 hydrate sandwiched in the double-symmetrical flat that is the approximate imitation system of hydrate located in veined distribution or throat space of porous media. The results indicate that the decomposition of the hydrate phase follows a somewhat relaxed shrinking-core mechanism from outer to inner, with this deviation being reflected in the differential collapse rates of the symmetrical sections of the hydrate layer. The difference of the collapse rate of hydrate layers is not only reflected in the distance from the interface, but also closely related to the surrounding crystal state. During the first 200 ps, the average diffusion coefficient of CO2 molecules is 0.659 × 10−9 m/s which is 0.53 times than that of the pure hydrate system with 1.241 × 10−9 m/s. Both stages of initial cage structure breakdown and CO2 nanobubbles formation evolution are clearly observed, and the phenomenon of molecular diffusion gradient is also appeared in last stage. Additionally, with the four spacing of 29.08 Å, 41.08 Å, 53.08 Å and 101.08 Å, an interesting decomposition mechanism was found, that is, the destabilization of hydrates occurred preferentially at the geometric center not just the interface of hydrate-media in the symmetric narrow confined space. The relevant result is very helpful to further understand the stable geological storage mechanism of CO2 gas in the form of hydrate in sediments.

Electrochemical characteristics of electrophoretically deposited nickel antimony oxide anode for lithium-ion rechargeable cells

Lithium‐ion batteries (LIB) are widely used energy storage devices for powering portable electronics, electric transportation, and the grid. In this work, the co-precipitation method synthesizes nickel antimony oxide (NiSb2O6; NSO), a relatively new material for LIB anode. The structure of this material is a tri-rutile phase, wherein the lithium (Li) ions are stored via a conversion-type mechanism. The nickel antimony oxide-carbon black (NSO-CB) electrodes are fabricated using electrophoretic deposition. Ex-situ X-ray diffraction analysis reveals the structural breakdown of NSO into nickel oxide (NiO) and antimony pentaoxide (Sb2O5) after the first discharge. In the voltage range 0.01–2.5V vs. Li+/Li, a stable reversible capacity of 574 mAhg−1 is obtained at a specific current of 0.5Ag-1 after 100 cycles. At a high specific current of 5Ag-1, these electrodes deliver a specific capacity of 370 mAhg−1, equivalent to graphite's theoretical capacity. The full-cell of Li(Ni0.8Co0.1Mn0.1)O2//NSO-CB delivers a nominal voltage of 2.83V vs. Li+/Li and can retain up to 84.2 % of its reversible capacity after 50 cycles. Therefore, electrophoretic deposition is established as a prospective processing technique to implement tri-rutile type NiSb2O6 as an anode material for LIBs.

Effect of shape, gluten, and mastication effort on in vitro starch digestion and the predicted glycemic index of pasta.

Gluten-containing (GC) and gluten-free (GF) pasta consumption has been growing in recent years. The market offers a wide variety of pasta types, with differences in shape and formulation that influence the mastication process and, consequently, their nutritional behaviors (i.e. starch digestibility and glycemic response). This study investigated the effect of shape, gluten, and structural breakdown on in vitro starch digestibility and predicted the glycemic index (pGI) of GC and GF penne, spaghetti, and risoni. Pasta was cooked and minced to mimic short, intermediate, and long mastication efforts. Short mastication led to a higher number of big particles than intermediate and long mastications for all pasta samples, which was reflected in the different starch digestibility and pGI patterns. Multivariate analysis of variance showed that the three studied factors differently affected the in vitro starch digestion of pasta. Mastication effort, shape, and their interaction mainly affected the starch digestion rate and pGI. Gluten was the major factor in affecting the amount of digested starch. The results suggested that small shapes (i.e. risoni), the presence of gluten, and short mastication effort led to a lower pGI. The findings will be useful for the development of pasta products tailored to fulfill the needs of specific consumers following a rational food design approach.

Ownership structures and corporate governance: A systematic analysis

This study aimed to analyze the ownership structures and corporate governance. Good corporate governance helps companies become more efficient, improve access to finance, reduce risk, and avoid substandard governance (Kontogeorga et al., 2022; Mustafa & Morina, 2022; Prasad et al., 2022; Lapina et al., 2016; Raja & Kostyuk, 2015). The study has followed a qualitative research paradigm and systematic review protocol, specifically the PRISMA technique, and included 65 papers published in journals with impact factors during the timeline of 2010–2022, focusing on Europe, the Middle East, Asia, and the US by taking topics like time, article type, regions, topics, theory breakdown for ownership structure, theory breakdown for corporate governance, and research methods. It was found that most of the papers were published in 2022. The majority of the articles were empirical, and most were published in Europe. The mainstream papers were related to corporate governance. The theory used in the breakdown of ownership structure was the firm theory, while for corporate governance, the theory was the agency theory, and most of the articles utilized the analysis method. The study recommended that, despite significant research in this area, further research is still needed, especially in developed countries. Most research work is experimental and, and therefore, requires a substantial amount of conceptual work.

Challenges and Solutions in Managing Tooth Resorption in Young Orthodontic Patients

Tooth resorption presents a significant challenge in young orthodontic patients, characterized by the breakdown of tooth structures due to various factors including mechanical forces and genetic predispositions. Early detection and management are crucial to prevent irreversible damage and ensure successful orthodontic outcomes. The management of tooth resorption requires a multifaceted approach, emphasizing early detection through advanced imaging techniques and regular clinical examinations. Preventive measures, including patient education and modification of orthodontic forces, are key in reducing the risk of resorption. Pharmacological interventions and surgical procedures are considered for severe cases, highlighting the need for personalized treatment plans. The role of genetics and age in susceptibility to tooth resorption underscores the importance of tailoring treatment strategies to individual patient profiles. Effective management of tooth resorption in young orthodontic patients demands a comprehensive understanding of its clinical manifestations and underlying causes. A proactive, personalized, and vigilant approach, incorporating advancements in technology and treatment modalities, is essential for minimizing the risks and ensuring the long-term oral health of patients. Further research is needed to optimize management strategies and explore the potential of emerging treatments.

The Intersection of Reality and Fiction in Tom Stoppard’s Rosencrantz and Guildenstern Are Dead: A Study of Absurdity and Metadrama

The article titled "The Intersection of Reality and Fiction in Tom Stoppard’s Rosencrantz and Guildenstern Are Dead: A Study of Absurdity and Metadrama" explores how Tom Stoppard's play transforms the minor characters from Shakespeare's Hamlet into central figures within an absurdist framework. This study examines the play’s themes of human identity, confusion, and helplessness, common in the Theatre of the Absurd, using postmodernist metadramatic techniques. By employing metadrama, Stoppard highlights the blurred lines between reality and fiction, as seen in the characters' struggles to understand their existence within the play. The paper delves into the philosophical implications of absurdity, drawing on the ideas of Albert Camus and other theorists to illustrate how Rosencrantz and Guildenstern Are Dead reflects the chaotic and purposeless nature of human life. Through various metadramatic devices like the play within a play, role-playing, and the breakdown of conventional narrative structures, Stoppard's work is analyzed as a profound commentary on the human condition and the search for meaning in an incomprehensible world.

Combining fracture mechanics and rheology to investigate the impact of micro-aeration on chocolate oral processing.

This study presents a rigorous mechanical characterisation investigation on milk chocolate with varying porosities, at different temperatures and strain rate levels. Uniaxial compression tests at temperatures varying from 20 °C to 30 °C were performed to measure the bulk properties of chocolate as a function of porosity and temperature. Fracture experiments were also conducted to compute the fracture energy at temperature levels between 20 °C and 30 °C for all tested samples. Additionally, rheological experiments are conducted to compute the viscosity of the different chocolates at 37 °C. This combined experimental analysis of solid mechanics, fracture mechanics, and rheology aims to define the impact of temperature and chocolate's phase change from solid to liquid on its mechanical properties. Moreover, the impact of micro-aeration on the relationship between material properties and temperature is discussed. The results demonstrate a significant impact of both temperature and micro-aeration on the chocolate's material properties; fracture stresses decrease with micro-aeration due to the presence of micro-pores creating weak links in the chocolate matrix, the critical strain energy release rate decreases with micro-aeration at temperatures up to 25 °C and increases at temperatures above 30 °C. Finally, the viscosity at 37 °C increases with increasing porosity due to the obstruction of the flow by micro-pores acting as "solid" particles. The results highlight how the impact of micro-aeration on the material properties of chocolate alters as the testing temperature rises and the material changes phase. The relationships between the micro-aeration and material properties and the dependence of temperature on the different mechanical properties are used to explain the difference in textural attributes as obtained from temporal dominance sensation tests. This study seeks to contribute valuable insights into the field of chocolate technology, emphasizing the need for a combined engineering approach to understand the structural breakdown of chocolate during oral processing as mechanisms such as chewing, melting, mixing and shearing occur.

A Novel Target Biomarker could be Galectin-3 for the Diagnosis and Treatment of Intervertebral Disc Degeneration?

The process of disc degeneration represents an abnormal, cell-mediated response leading to progressive structural failure. A degenerated disc is one with structural breakdown accelerated or accompanied by signs of advanced aging. It tends to exhibit degenerative and aging changes earlier than other connective tissues in the body. Given the relationship between back pain and disc degeneration, it\'s considered clinically significant. The roles of Galectin-3 in brain development, within glial cells, and their interaction with other neural and invading cells in pathological conditions have been observed. Successful nerve regeneration via functional repair involves both internal and external factors such as neurons\' ability to rebuild axons, support for axonal growth, and accessible target tissues for re-innervation. The study evaluated the role of Galectin protein in tissue regeneration and its potential as a diagnostic marker in Lumbar Herniated Disc degeneration. It was conducted on a total of 50 individuals, including 29 LD trauma cases and 21 healthy subjects, at the Brain Surgery Clinic. Assessing the expression of two molecules in Lumbar disc degeneration, no significant difference was found in resistin levels between groups (p=0.853), whereas Galectin levels were significantly different between the Control and LD (Lumbar disc) groups (p<0.001). Galectin protein secretion was found to be higher in the LD group compared to the control group. Early assessment of Galectin protein could p

A proposed framework to establish in vitro-in vivo relationships using gastric digestion models for food research.

In vitro digestion methods have been utilized in food research to reduce in vivo studies. Although previous studies have related in vitro and in vivo data, there is no consensus on how to establish an in vitro-in vivo relationship (IVIVR) for food digestion. A framework that serves as a tool to evaluate the utility and limitations of in vitro approaches in simulating in vivo processes is proposed to develop IVIVRs for food digestion, with a focus on the gastric phase as the main location of food structural breakdown during digestion. The IVIVR consists of three quantitative levels (A, B, and C) and a qualitative level (D), which relate gastric digestion kinetic data on a point-to-point basis, parameters derived from gastric digestion kinetic data, in vitro gastric digestion parameters with in vivo absorption or appearance parameters, and in vitro and in vivo trends, respectively. Level A, B, and C IVIVRs can be used to statistically determine the agreement between in vitro and in vivo data. Level A and B IVIVRs can be utilized further evaluate the accuracy of the in vitro approach to mimic in vivo processes. To exemplify the utilization of this framework, case studies are provided using previously published static and dynamic gastric in vitro digestion data and in vivo animal study data. Future food digestion studies designed to establish IVIVRs should be conducted to refine and improve the current framework, and to improve in vitro digestion approaches to better mimic in vivo phenomena.

Research on modeling the thixotropic properties of cementitious systems using regression methods in machine learning

In this study, the rheological properties of cementitious systems were investigated through modeling studies on structural build-up and breakdown area. The area values were calculated using Herschel Bulkley analysis and hysteresis area method. The properties were examined by varying the composition of the cementitious system (cement fineness, C4AF, C3S, C2S, C3A, equivalent alkali and metakaolin ratio) and changes made in the rheological measurement processes (applied shear rate, maximum shear rate and duration). For this purpose, cement paste mixtures were prepared by substituting metakaolin at four different ratios (3%, 6%, 9%, and 12%) into cements with varying C3A content (2.13, 3.60, 6.82, 9.05%). The modeling study of the obtained results was conducted using three different learning methods: Linear Regression Analysis (LR), AdaBoost, and K Nearest Neighbor (KNN), encompassing machine learning and ensemble learning techniques. It was determined that the most dominant parameter affecting the rheology and thixotropic properties of the mixtures is the metakaolin usage ratio. The pre-shear rate was dominant over the duration and maximum shear rate parameters. Effect of the C3A content on dynamic yield stress and viscosity becomes more pronounced with an increase in the applied shear rate. The KNN method has yielded the best results in all experimental modeling studies. Euclidean distance criterion was used in the KNN method. Although the AdaBoost method obtained results close to the KNN method, the opposite situation was observed depending on the number of data. Logcosh, MAE and RMSE metrics were used to evaluate the experimental results. When the results for 3 different metrics in all modeling studies were examined, the success order of the metrics was found to be Logcosh, MAE and RMSE.

Orthodox Poets of the Soviet Era: Aleksandr Solodovnikov, Vasily Nikitin, Sergey Averintsev, Elena Pudovkina

The article explores the work of Orthodox poets during the Soviet era, particularly focusing on Aleksandr Solodovnikov, Vasily Nikitin, Sergey Averintsev, and Elena Pudovkina. It formulates a general principle of the poetic style of these authors as the principle of soul, word, and world transformation, realized through prayerful and confessional expressions. The distinctive feature of the resurging Orthodox poetry in the 20th century primarily lay in its pursuit of maximum immediacy, simplicity, and originality, deliberately transcending “literariness,” which was particularly burdensome for individuals of the 20th century. In turn, the analysis reveals that due to this aspiration for the primacy of the word, it unexpectedly proves to be far more complex than it appears at first glance. It carries not only profound meanings of Orthodox faith but also the deep tradition of Christian “literariness” in the best sense of the term—an active continuity with the texts of predecessors, reaching back to ancient Russian and Byzantine heritage. Moreover, it strives to reproduce the spirit of the Gospel’s word, as far as it is humanly possible. Literary creation for an Orthodox person is justified and beneficial only when it constitutes a part of their spiritual self-improvement and transmits the experience of this work to others. It represents the work of soul transformation by the grace of God, captured in the word. Spiritual poetry is traditional not only in content but also in form, oriented toward classical poetry of the 19th century as its model. In cases when it diverges from this model, it does not tend toward the modernism of the 20th century but, conversely, delves into the deep archaism of the early centuries of Christianity, sometimes directly aligning with the structure of the Gospel’s word and canonical church hymns. This is logical since the breakdown of classical poetic structure in the 20th century was a consequence of secularization—the despiritualization of the world and language. Accordingly, the reverse process inevitably led to the revival of the style of classical poetry and even its earlier form—the church poetry.

Site-selection and recognition of aromatic carboxylic acid in response to coronene and pyridine derivative

The self-assembled structures of H3BDA molecule with multiple meta-dicarboxylic groups and their stimulus responses to the guest molecules (COR and T4PT) are thoroughly investigated by scanning tunneling microscopy (STM). STM observations display that two kinds of nanostructures are fabricated by H3BDA molecules through intermolecular hydrogen bonds, in which a linear structure is formed at a higher concentration and a flower-like structure is obtained at a lower concentration. After the addition of COR and T4PT, H3BDA appears different responsiveness resulting in different co-assembled structures, respectively. The linear structure is regulated into a flower-like structure by COR and COR molecules are trapped in the cavities. When the pyridine derivative (T4PT) is introduced, a new bicomponent porous structure emerges via the hydrogen bond formed between the carboxyl group and the pyridine. Furthermore, the deposition of additional COR to the H3BDA/T4PT system results in the breakdown of the porous structure and the generation of H3BDA/COR host–guest system. Combined with density functional theory (DFT) calculations and molecular dynamics (MD) simulations, the transformation phenomenon of bi-component nanostructure induced by guest molecules is formulated. The results are expected to understand the modification effect of guest molecules on the host network, which is of great significance for the design and construction of multi-component nanostructures and crystal engineering.

Analysis of Structural Changes in Practical Batteries during Overcharging Using Synchrotron X-Ray CT Imaging

Lithium-ion rechargeable batteries are desired for applications such as power sources for electric vehicles, which require increased energy density to extend cruising range. In the cathode, increasing the nickel content makes it possible to increase the energy density, but this is problematic due to a decrease in safety. To solve this problem, it is necessary to clarify the phenomena leading to structural breakdown by operando observation[1]. We have developed a system for operando non-destructive observation of the internal structure of all batteries under transient conditions using 100 keV collimated light of SPring-8 beamline. In this study, the difference in the behavior of LiCoO2 (LCO), LiNi0.6Mn0.2Co0.2O2 (NMC622) and LiNi0.8Mn0.1Co0.1O2 (NMC811) during overcharging was discussed in combination with the measurement of the electronic structure of the cathode active materials from the surface to the bulk.A 40-layer laminated battery (1 Ah) was used, with LCO, NMC622 and NMC811 as the cathodes and natural graphite as the anode. After charging to 100% SOC at 1C (1C=160 mAh/g) rate at room temperature, the overcharge process performed under 3C and/or 6C rate from 100% SOC while measuring voltage and temperature. Overcharge behavior inside the battery was observed simultaneously by operando X-ray CT during overcharge process.During the overcharge test at 6C rate, the maximum temperature of the LCO laminated battery was 390 ℃, while NMC811 laminated battery reached over 600 ℃ (Fig. 1). Point 1 in Fig. 1 is the point where changes in the electrode structure begin to be observed by the operando X-ray CT measurements. The point 1 of NMC811 occurred earlier (203 s) than LCO (542 s). From the O-K XAS result (Fig. 1d), the pre-edge (located at 519 ev) of NMC811 was much higher than LCO and NMC622 when overcharging to 200% SOC, meanwhile the O-Ni bond in NMC is more unstable than O in LCO in the overcharged state. The unstable electronic structure of oxygen on the surface of NMC811 is the starting point for the rapid structural change of the battery during overcharging. Reference s : [1] Donal P. Finegan; Mario Scheel; James. Robinson; Bernhard T.; Marco Di M.; Gareth H. Phys.Chem.Chem.Phys. (2016), 18, 30912. Figure 1

Showing the role of weakly-bound particles flocculation in the reversibility of thixotropic behavior for fresh cement paste

The thixotropic behavior of fresh cement-based materials has been found to be derived from the reversible breakage and agglomeration of flocculated cement grains. The existence of thixotropy can lead to significant variations in shear stress and apparent viscosity under the same shear rate, which brings great challenges for measuring rheological performance. This paper highlights the difference between strong and weak particles flocculation for the first time, and then reveals the intrinsic interactions of various thixotropic and rheological parameters. The thixotropic behavior and dynamic yield stress were evaluated for cement paste samples with different resting time and temperature conditions. It was found that the longer resting time, the higher temperature, and the larger solid volume fraction increased the difficulties for both the structural breakdown and the subsequent structural re-buildup processes, indicating the lower reversibility of thixotropic behavior; These factors also led to higher dynamic yield stress, more amount of strongly-bound flocs, but less weakly bound flocs. After removal of shear force, the microstructure reconstruction ability of fresh cement paste was highly correlated to the recovery of dispersed weak flocs, but with little regard to strong flocs. The dynamic yield stress value could be dependent on the breakage degree of flocculation, while the prolonged duration of last several steps in the descending portion of the rheometric procedure enhanced the dynamic yield stress due to structural re-buildup. The results will provide new in-depth insights into the roles of strong and weak flocs in the reversible thixotropic behavior of fresh cement-based materials.

Multifocal Acquired Demyelinating Sensory and Motor Neuropathy (MADSAM) with Cranial Nerve Involvement. Case Report

BACKGROUND: The multifocal acquired demyelinating sensory and motor neuropathy (MADSAM) is a rare adult onset subvariant of the chronic inflammatory demyelinating polyneuropathy (CIDP). The latter affects 1-9 cases per million adults and may pose a diagnostic challenge (antibody and electrophysiological overlap). The hallmark of the disease spectrum is an immune mediated structural myelin breakdown. Urgent differentiation of MADSAM from the other variants of CIDP is indicated due to its distinct pathogenesis, management, and long-term therapy response to immunomodulators. The disease presents with progressive asymmetrical motor and sensory deficits initially located typically in one limb. Rarely the disease manifests with cranial nerve involvement. The prognosis of patients suffering from MADSAM is reliant on rapid diagnosis and therapeutic response, but neurological deficits reside. Due to its rarity and diagnostic challenge, misdiagnosis is common. THE CASE: A 84 years old Caucasian male diagnosed with multifocal acquired demyelinating sensory and motor neuropathy (MADSAM) presented to our department with progressive neurological deficits. His neurological examination and history revealed paresthesia, hypesthesia, diminished vibration sense (pallhypesthesia), distally pronounced paresis in the upper extremities with a wrist drop on the left hand. Gait examination exposed coordination deficits. The history of the patient and the initial presentation of the disease in 1998 exemplifies the diagnostic challenge of MADSAM, due its mimicry of other diseases, like multifocal motor neuropathy (MMN). The initial symptoms were asymmetrical motor and sensory deficit starting at the upper extremities. Before the patient presented to our facility, he was diagnosed with neuroborreliosis and treated accordingly. The correct diagnosis was set at our department according to clinical presentation, nerve conduction velocity parameters and conduction block during electroneurography, typical changes in nerve ultrasound suggesting an inflammatory neuropathy and fasciculations of the gastrocnemius muscle. After an ineffective steroid therapy and long standing intravenous immunoglobulins the patient is now on a therapeutic scheme of 1000mg Rituximab (CD20 Ab) every 6 months and 1000mg Mycophenolatmofetil. The patient subjectively reports improvement of his status and slower progression of the disease since the Rituximab paradigm. Furthermore, an evident atrophy of the orbicularis oculi muscle was now noted during follow up examination, which highlights facial nerve involvement. CONCLUSION: This case exemplifies the challenge of diagnosing the multifocal acquired sensory and motor neuropathy, but prompt diagnosis and therapeutic intervention is associated with a better prognosis and slower progression of the disease in patients suffering from MADSAM.

Techniques and methods for obtaining access to data protected by linux-based encryption – A reference guide for practitioners

This research presents an overview of the typical disc and folder-level encryption that a digital forensic investigator may encounter when investigating a Linux operating system. Based on prior first-hand experience and significant follow-up testing and research, this work examines the operation of such encryption from the user's perspective, discusses how the encryption operates “under the hood”; and explores methods and techniques that can be used to access and retrieve data from such encrypted devices, both during at-scene/live forensic investigation and also post-scene. Worked examples are presented, to aid the reader's understanding. This research also presents considerations, approaches and steps that can be used by an investigator, in order to maximise the potential for data acquisition, and most crucially discusses lessons learnt to facilitate getting the best evidence in such cases. A breakdown of the binary structure of the key files associated with fscrypt is also presented, for reference. Current limitations and gaps in knowledge are also discussed.

In-situ observation of single-phase compositionally-complex oxide formation during high-pressure and high-temperature synthesis

Compositionally-complex oxides (CCOs) with equal or non-equal atomic ratios of multi-principal cations are single-phase solid solutions and possess unique structural characteristics and correlated possibilities for tailorable and exceptional functionalities. However, breakdown of single-phase structure and phase separation impair widespread adoption of CCOs under in-service environments. Here, in-situ phase transformation during high-pressure and high-temperature synthesis of an exemplary CCO (CeZrHf)0.852(YbY)0.148O2-δ is for the first time clarified by using synchrotron X-ray energy dispersive diffraction. During synthesizing at ∼4.5 GPa inside a large-volume press, ZrO2 and HfO2 gradually initiate lattice diffusion as monoclinic (022) and (220) peaks collapse and merge completely at 973 K; CeO2 starts diffusing as the dramatic intensity change of cubic (220) peak above 1073 K, causing a metastable phase formation; single-phase solid solution ultimately forms at 1673 K. The results revealed provide in-depth understanding of phase transformation dynamics and insights for novel design paradigm of CCOs.

CuFe Layered Double Hydroxide as Self-Cascade Nanoreactor for Efficient Antibacterial Therapy.

Nanozyme-induced reactive oxygen species (ROS)-dependent catalytic therapy has been developed into a powerful strategy against bacterial wound infections. However, the limited endogenous supply or instability of H2O2, the reliance on external stimuli for the generation of ROS, and the highly expressed glutathione (GSH) level make it a challenge to achieve high-performance therapeutic efficiency. In this work, a facile therapeutic strategy against bacterial infections with pristine CuFe layered double hydroxide (LDH) as the self-cascade nanoreactor is proposed without modification or additional energy input. CuFe LDH with an oxidase-like feature can catalyze the generation of multiple ROS, such as 1O2, ·O2-, and H2O2. And the self-generated H2O2 in the cascade nanoreactor could be further in situ transformed to ·OH owing to the peroxidase-like activity. As a result, the cell membrane of bacteria is destroyed, leading to death. Furthermore, its ultrahigh enzyme-like activity of CuFe LDH could effectively promote the breakdown of the biofilm structure. Additionally, the Cu2+-mediated GSH exhaustion of CuFe LDH further avoids the consumption of oxidized ROS and thereby significantly improves the sterilization effect. Finally, the as-prepared CuFe LDH with negligible side effects on normal tissues can be successfully used to eliminate the methicillin-resistant Staphylococcus aureus-infected wounds and accelerate their healing in the mouse model, which paves a new avenue as an antibacterial agent for clinical anti-infective treatment.

Revealing insights into hydrodynamic noise induced by different cavitating flows around a hydrofoil

Cavitation-induced noise hazards in marine environments have raised significant concerns. This paper presents a study on the flow noise generated by cavitating flow around a model-scale NACA66 hydrofoil, utilizing the permeable acoustic analogy method. Through Large Eddy Simulation and the Schnerr-Sauer cavitation model, the study captures the cavitation flow pattern, aligning with experimental observations. The research conducts a detailed analysis of the monopole and dipole noise components, providing insights into their characteristics under different cavitation conditions (cavitation number σ = 0.60, 0.83, 1.29, and 1.44). The results revealed a noteworthy trend where the proportion of the dipole component increases as the cavitation number σ decreases. Furthermore, the study uncovered the mechanism behind monopole noise induction in unsteady cavitating flows, offering insights into different types of sound impulse sources associated with cavitation collapse. Particularly, the collapse of clouds during secondary shedding is identified as a significant source of highly intense impulses, surpassing the levels observed in other cavitation flow stages. Additionally, deeper exploration demonstrated the co-action of vortex stretching and dilatation, contributing to the enhanced deformation, breakdown, and condensation of vapor structures, consequently significantly accelerating the collapse process.