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The rapid development of lithium battery technology is leading to the increasing miniaturization of electronic devices, thereby elevating the demand for dielectric materials with exceptionally high thermal conductivity and dielectric properties. In this study, the composites were fabricated by integrating multilayer core-shell hybrid structure particles into silicone rubber (SR). These particles were created by attaching the conductive polymer polypyrrole (PPy) and the silane coupling agent (KH570) onto the surface of highly thermally conductive ceramic particles aluminum nitride (AIN). The combination of PPy and KH570 serves to enhance the interfacial compatibility between AIN and SR, thereby concurrently enhancing the thermal conductivity and dielectric properties of the composites. The experimental results demonstrated that the thermal conductivity of the 50 phr AlN-PPy-KH570/SR composite was 0.37 W/(m * K), 1.65 times higher than that of pure SR (0.23 W/(m * K)). Additionally, the dielectric constant of the composite increased to 4.59, 1.32 times that of pure SR (3.48). Moreover, the thermal decomposition temperature of the composite was elevated to 475[degrees]C. The synthesized SR composites hold promise for widespread use in miniaturized electronic devices operating in high-frequency and high-temperature environments. KEYWORDS aluminum nitride, dielectric properties, silicone rubber, thermal conductivity Highlights 1. Organic-inorganic core-shell AlN-PPy-KH570 particles structure were prepared. 2. The synergistic effect of PPy and KH 570 improve the thermal conductivity., 1 | INTRODUCTION With the rapid development of lithium battery technology, electrical devices are gradually shifting towards miniaturization [1,2]. This trend demands improved dielectric properties and thermal conductivity in dielectric [...]

Vaccine adjuvants are crucial for reinforcing the immunogenicity of vaccines. Therefore, they are widely used in the aquaculture sector as vaccine components, facilitating the efficient prevention of infectious diseases and promoting sustainable teleost fish growth. Despite their benefits, there has been a growing concern about the potential adverse effects of vaccine adjuvants in teleost fish, connoting a valid impact on their overall health and welfare. Among the adjuvants used in aquaculture vaccinology, nanoparticle-based formulations have given rise to a promising new alternative to traditional options, such as oil-based emulsions and aluminum compounds, offering the benefit of minimizing relevant side effects. The aim of this paper was to review the current status of the adjuvants used in aquaculture, provide a description and an evaluation of their mode of action and side effects, and explore the potential use of nanoparticle formulations as adjuvants to improve the efficacy of aquaculture vaccines. By demonstrating and assessing the equilibrium between teleost fish welfare and immunological efficacy, this review presents a collective perspective that will assist in establishing a framework for the utilization of effective species-specific practices around adjuvant use in aquaculture, while also addressing the challenges of welfare-friendly immunization. [ABSTRACT FROM AUTHOR]

The purpose of this study is to evaluate a treatment for aluminum phosphide (ALP) poisoning, which is known as “rice tablet”. Methods: In the present study, the impact of different doses of ethanolic extract of olive leaves (100, 200, and 400 mg/kg) on ALP (120 mg/kg)-induced cardiotoxicity was evaluated in anesthetized-gastrotomized adult male Wistar rats. Thirty-five rats were randomly assigned into five groups (n=7) as follows: control (AC) and treatment groups [ALP+Olea100 (AO100), ALP+Olea 200 (AO200), and ALP+Olea 400 (AO400)]. Physiological data including blood pressure, heart rate, electrocardiogram (ECG), as well as oxidative stress markers were measured in heart tissues. Results: ALP-intoxication led to perturbed normal ECG and increased oxidative stress. Administration of olive leaf extract at various concentrations, however, mitigated bradycardia after 90 minutes, following ALP-intoxication (in AO200), hypotension (in AO100), and cardiac conduction disturbances (decreased QTC in the AO200 30 (P

Background: Aluminum phosphate (ALP) poisoning has a high mortality rate (MR) secondary to cardiogenic shock. Recently, extracorporeal membrane oxygenation (ECMO) showed a successful result in this issue. We conducted a systematic review and meta-analysis to compare the MR of patients with ALP poisoning who underwent ECMO versus those with conventional treatment. Materials and Methods: Two parallel databases' reviews were done to find the ECMO treatment-applied studies or conventional treatment-applied studies according to the PRISMA protocol. All studies in any languages and English conference abstracts were included for ECMO treatment-applied studies. Only English-language human observational studies, which reported MR, were included in conventional treatment-applied studies. All ETAS case reports were summarized and used as a newly generated cross-sectional study (NGCSS) for inclusion in the meta-analysis. Results: Out of 167 and 1043 records, 17 case reports (24 cases), 3 cross-sectional studies, and 9 conventional treatment-applied studies were selected. In meta-analysis NGCSS applied as the fourth cross-sectional ECMO treatment-applied studies. The overall MR of ECMO-treated cases (23% [95% confidence interval (CI): 7%-39%]) was significantly less than conventionally treated cases (60% [95% CI: 39%-63%]; P < 0.001). In ECMO-treated cases, the weighted mean difference (WMD) for age, blood pH, ALP dose, hospitalization, ECMO lag time, and ECMO duration were not statistically significant between survived and nonsurvived cases. However, WMD of cardiac ejection fraction (4.6%; 95% CI: 2.76%-6.39%; P < 0.0001), exposure to hospitalization lag time (-2.05; 95% CI: -4.05-0.14 h; P = 0.06), and length of hospital stay (16; 95% CI: 12.0-20.5 days; P < 0.0001) between survived and nonsurvived ETC were significant. Conclusion: ECMO reduced the MR of ALP-poisoned patients; however, it is a highly invasive and complicated procedure. [ABSTRACT FROM AUTHOR]

A water-soluble ternary copolymer bearing carboxyl, sulfonic, and amide functional groups was synthesized using ammonium persulfate-catalyzed free radical polymerization in water, resulting in high monomer conversion. This copolymer was then complexed with aluminum sulfate, forming an admixture containing Al(SO4)(OH)·5H2O, which was subsequently combined with silica gel. Characterization revealed that the synthesized copolymer formed a large, thin membrane that covered both the aluminum compounds and the silica gel blocks. The introduction of this complex admixture, combining the copolymer and aluminum sulfate, not only reduced the setting times of the cement paste but also enhanced the mechanical strengths of the mortar compared to using aluminum sulfate alone. The complex admixture led to the formation of katoite, metajennite, and C3A (tricalcium aluminate) in the mortar, demonstrating significant linking effects, whereas pure aluminum sulfate could not completely transform C3S within 24 h. Further addition of silica gel to the complex admixture further shortened the setting times of the paste, slightly reduced compressive strength, but improved flexural strength compared to the initial complex admixture. The silicon components appeared to fill the micropores and mesopores of the mortar, accelerating cement setting and enhancing flexural strength, while slightly decreasing compressive strength. This study contributed to the development of new cementing accelerators with improved hardening properties. [ABSTRACT FROM AUTHOR]

Background: Apexification is a procedure that promotes apical closure by forming mineralized tissue in the apex region of a nonvital young permanent tooth. Calcium silicate-based cement like Mineral trioxide aggregate (MTA) and Biodentine are commonly employed as apical barriers to facilitate this process. Microleakage, defined as the leakage along the junction between the canal wall and filling material, is a crucial aspect to assess in MTA and Biodentine applications as apical barriers, as it directly impacts the prevention of bacterial seepage and maintenance of structural integrity. The current study aims to assess the microleakage of MTA and Biodentine when used as apical barriers in simulated young permanent teeth. Methods: From a total of 128 extracted teeth, 114 were selected for the study and randomly allocated into three groups: G1 (MTA), G2 (Biodentine), and G3 (Control), with 38 teeth per group. After excluding 5 teeth from each group due to issues such as canal calcification, breakage during sectioning, and procedural errors, 33 teeth were analyzed to ensure equal distribution. To simulate young permanent teeth, samples were instrumented using a person-reamer with a diameter of 1.7 mm. A 4 mm thick apical plug of MTA and Biodentine was placed in G1 and G2, respectively, while G3 was the control group. Apical microleakage in all experimental groups was assessed using a dye penetration method. Specimens were longitudinally sectioned and examined under a stereomicroscope with graded eyepiece. Results: The Kruskal-Wallis test revealed variations in mean apical microleakage among the groups: G1 recorded 0.67, G2–0.16, and G3–1.62, with G2 showing the lowest value and G3 group exhibiting the highest. Conclusions: Biodentine was found to excel in its ability to create a secure seal and function effectively as an apical barrier in simulated young permanent teeth. These results underscore its potential as a highly efficient material for dental applications, particularly in scenarios requiring reliable sealing and barrier formation in the root canal system of developing permanent teeth. [ABSTRACT FROM AUTHOR]

Although luminescent aluminum compounds have been utilized for emitting and electron transporting layers in organic light-emitting diodes, most of them often exhibit not phosphorescence but fluorescence with lower photoluminescent quantum yields in the aggregated state than those in the amorphous state due to concentration quenching. Here we show the synthesis and optical properties of β-diketiminate aluminum complexes, such as crystallization-induced emission (CIE) and room-temperature phosphorescence (RTP), and the substituent effects of the central element. The dihaloaluminum complexes were found to exhibit the CIE property, especially RTP from the diiodo complex, while the dialkyl ones showed almost no emission in both solution and solid states. Theoretical calculations suggested that undesired structural relaxation in the singlet excited state of dialkyl complexes should be suppressed by introducing electronegative halogens instead of alkyl groups. Our findings could provide a molecular design not only for obtaining luminescent complexes but also for achieving triplet-harvesting materials. Luminescent aluminum compounds have been utilized for emitting and electron transporting layers in organic light-emitting diodes, but most exhibit fluorescence as opposed to phosphorescence. Here, the photophysical properties of β-diketiminate aluminum complexes are shown to depend on the nature of the metal substituents, with a diiodoaluminum complex displaying room temperature phosphorescence. [ABSTRACT FROM AUTHOR]

Background: This study aimed to compare the marginal adaptation of a single customized gutta percha cone with calcium silicate-based sealer versus mineral trioxide aggregate (MTA) and Biodentine apical plugs in simulated immature permanent teeth. Methods: Thirty-nine extracted human maxillary anterior teeth were selected, prepared to simulate immature permanent teeth with an apical diameter 1.1 mm, placed in moist foam and divided into three groups. Group 1: Obturation with a single customized gutta percha cone and calcium silicate sealer. Group 2: MTA apical plug. Group 3: Biodentine apical plug. After incubation, teeth were horizontally sectioned at 1 mm and 3 mm from the apex and marginal adaptation was evaluated using scanning electron microscope (SEM). Results: Biodentine showed the least mean gap size at both 1 and 3 mm from the apex with no statistically significant differences compared to MTA (p > 0.05). The single customized cone with calcium silicate based sealer showed the greatest mean gap size at both 1 and 3 mm from the apex with a statistically significant difference compared to the other groups (p < 0.001). Conclusion: Biodentine and MTA apical plugs provide a significantly better marginal adaptation to the dentinal walls than a single customized gutta percha cone with calcium silicate based sealer in simulated immature permanent teeth. [ABSTRACT FROM AUTHOR]

The physicochemical properties of natural bentonite and its sorbents were studied. It has been established the modification of natural bentonites using polyhydroxoxides of iron (III) (mod.1_Fe_5-c) and aluminum (III) (mod.1_Al_5-c) by the "co-precipitation" method led to changes in their chemical composition, structure, and sorption properties. It was shown that modified sorbents based on natural bentonite are finely porous (nanostructured) objects with a predominance of pores of 1.5–8.0 nm in size. The modification of bentonite with iron (III) and aluminum compounds by the "co-precipitation" method also leads to an increase in the sorption capacity of the obtained sorbents with respect to bichromate and arsenate anions. A kinetic analysis showed that, at the initial stage, the sorption process was controlled by an external diffusion factor, that is, the diffusion of the sorbent from the solution to the liquid film on the surface of the sorbent. The sorption process then began to proceed in a mixed diffusion mode when it limited both the external diffusion factor and the intra-diffusion factor (diffusion of the sorbent to the active centers through the system of pores and capillaries). To clarify the contribution of the chemical stage to the rate of adsorption of bichromate and arsenate anions by the sorbents under study, kinetic curves were processed using equations of chemical kinetics (pseudo-first-order, pseudo-second-order, and Elovich models). It was found that the adsorption of the studied anions by the modified sorbents based on natural bentonite was best described by a pseudo-second-order kinetic model. The high value of the correlation coefficient for the Elovich model (R2 > 0.9) allows us to conclude that there are structural disorders in the porous system of the studied sorbents, and their surfaces can be considered heterogeneous. Considering that heterogeneous processes occur on the surface of the sorbent, it is natural that all surface properties (structure, chemical composition of the surface layer, etc.) play an important role in anion adsorption. [ABSTRACT FROM AUTHOR]

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This study delves into an in-depth examination of the biomechanical characteristics of various materials commonly utilized in the fabrication of artificial ankle joints. Specifically, this research focuses on the design of an ankle joint resembling the salto-talaris type, aiming to comprehensively understand its performance under different loading conditions. Employing advanced finite element analysis techniques, this investigation rigorously evaluates the stresses and displacements experienced by the designed ankle joint when subjected to varying loads. Furthermore, this study endeavors to identify the vibrating frequencies associated with these displacements, offering valuable insights into the dynamic behavior of the ankle joint. Notably, the analysis extends to studying random frequencies across three axes of motion, enabling a comprehensive assessment of directional deformities that may arise during joint function. To validate the effectiveness of the proposed design, a comparative analysis is conducted against the star ankle design, a widely recognized benchmark in ankle joint prosthetics. This comparative approach serves dual purposes: confirming the accuracy of the findings derived from the salto-talaris design and elucidating the relative efficacy of the proposed design in practical application scenarios. [ABSTRACT FROM AUTHOR]

Background: Several efforts have been made to improve mechanical and biological properties of calcium silicate-based cements through changes in chemical composition of the materials. This study aimed to investigate the physical (including setting time and compressive strength) and chemical (including calcium ion release, pH level) properties as well as changes in cytotoxicity of mineral trioxide aggregate (MTA) after the addition of 3 substances including CaCl2, Na2HPO4, and propylene glycol (PG). Methods: The systematic review was conducted in accordance with Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA). Electronic searches were performed on PubMed, Embase, and Scopus databases, spanning from 1993 to October 2023 in addition to manual searches. Relevant laboratory studies were included. The quality of the included studies was assessed using modified ARRIVE criteria. Meta-analyses were performed by RevMan statistical software. Results: From the total of 267 studies, 24 articles were included in this review. The results of the meta-analysis indicated that addition of PG increased final setting time and Ca2+ ion release. Addition of Na2HPO4 did not change pH and cytotoxicity but reduced the final setting time. Incorporation of 5% CaCl2 reduced the setting time but did not alter the cytotoxicity of the cement. However, addition of 10% CaCl2 reduced cell viability, setting time, and compressive strength. Conclusion: Inclusion of 2.5% wt. Na2HPO4 and 5% CaCl2 in MTA can be advisable for enhancing the physical, chemical, and cytotoxic characteristics of the admixture. Conversely, caution is advised against incorporating elevated concentrations of PG due to its retarding effect. Trial registration: PROSPERO registration number: CRD42021253707. Highlights: • Total substitution of water with PG to enhance the handling properties of CSC will prevent it from complete setting. • High concentrations of CaCl2 added to MTA lead to increased cytotoxicity of the admixture. • According to conventional statistical methods, determining the sample size is of significant importance for laboratory studies to reduce the risk of bias. [ABSTRACT FROM AUTHOR]

Background: Aluminum phosphide is a commonly used pesticide, particularly in developing countries where uncontrolled insecticides and pesticides are commonly prevalent. Mortalities have been reported due to accidental and suicidal exposures to aluminum phosphide. To date, there has been no reported mortality case of aluminum phosphide in Lebanon. In addition, there is no specific antidote for aluminum phosphide toxicity and the treatment is mainly supportive. This is why awareness should be spread about this case to include it in the differential diagnoses and enhance prompt management and response in future encounters. Case presentation: A previously healthy 37-year-old male, presented to the emergency department of Notre Dame des Secours University Hospital Center for a suicidal attempt after ingesting 5 tablets of pesticide containing 56% aluminum phosphide an hour prior to presentation. Shortly after the presentation, the patient began deteriorating and became clinically unstable. The patient was then intubated and was started on sodium bicarbonate along with aggressive fluid resuscitation. The patient remained hypotensive even after giving vasopressors. He was then later admitted to the intensive care unit for further management. However, the patient further decompensated and developed multiorgan failure. This is the first case of mortality in Lebanon from aluminum phosphide toxicity. Conclusions: Emergency physicians should include aluminum phosphide toxicity in the differential diagnosis when dealing with patients ingesting unknown pesticides especially when they smell the characteristic garlic-like odor. The toxicity from ALP leads to multiorgan failure and death rapidly. Thus, it is of utmost importance to start early, and aggressive resuscitation given that there is no specific antidote. [ABSTRACT FROM AUTHOR]

Background: Until now, no definite standardized method has been used to promptly assess the severity and outcome of acute aluminum phosphide (ALP) poisoning. The current study aimed to evaluate the performance of the new Poisoning Mortality Score (PMS) and PGI score for predicting mortality in acute ALP-poisoned patients, highlighting the accuracy of new PMS components. Patients and Methods: A 2-year cross-sectional study was conducted on ALP-poisoned patients admitted to Tanta University Poison Control Centre from April 2021 to March 2023. Socio-demographics, poisoning data, and initial vital signs were recorded. Additionally, new PMS and PGI scores were calculated on admission. Patients were categorized according to the mortality outcome into survivors and nonsurvivors. Results: Out of 160 included ALP poisoned patients, mortality was recorded in 112 (70%) patients. The nonsurvivors had significantly higher median PGI and new PMS values than survivors. New PMS, vital signs component of new PMS, and PGI conveyed good discriminatory power for predicting mortality (AUC = 0.883, 0.873, and 0.817, respectively). Although the new PMS outperformed PGI in all predictive metrics, no significant difference in AUCs was observed between the new PMS and its vital signs component. Conclusion: The new PMS vital signs component is closely aligned with the new PMS. Thus, it can be used as a valid, comprehensive, and practical tool to substitute the whole score calculation for rapid ALP-poisoned patient assessment to enhance emergency clinical decision-making. [ABSTRACT FROM AUTHOR]

Introduction: Aluminum phosphide (AlP) is a chemical compound that can cause death in some countries. AlP inhibits the functioning of cytochrome C oxidase in the mitochondria of cardiomyocytes, leading to toxicity. Oxidative stress and ROS production, as well as inflammatory signaling, mediate the mechanisms of AlP-related toxicity in the poisoned patient. Unfortunately, there are no approved medicines available to treat AlP poisoning yet. To address this issue, researchers have explored various interventions to reduce the toxicity associated with AlP tablets. Methods: We systematically searched relevant databases for English articles published between 2013 and 2024. Results: The evaluated treatments included correcting oxidative stress parameters, enhancing exogenous antioxidant capacity, modifying electrocardiographic abnormalities, and improving heart contraction strength. Our evaluation indicated that compounds like Triiodothyronine, Vasopressin and milrinone, Iron sucrose, Acetyl-l-carnitine, Melatonin, Fresh red blood cell transfusion, Minocycline, Moringa oleifera extract, Dihydroxyacetone, Selegiline, Nanocurcumin, Levosimendan, Exenatide, Taurine, Cannabidiol and Edaravone are effective in lessening AlP-induced cardiotoxicity. Conclusion: Based on the present study's findings and the evaluation of clinical studies, dihydroxyacetone, fresh red blood cell infusion, Oil-based disinfection, and gastric lavage have the most potential to save patients' lives and treat acute aluminum phosphide. However, there is a need for more research in this regard. [ABSTRACT FROM AUTHOR]

Much has been learned about the neurotoxicity of aluminum over the past several decades in terms of its ability to disrupt cellular function, result in slow accumulation, and the difficulty of its removal from cells. Newer evidence suggests a central pathophysiological mechanism may be responsible for much of the toxicity of aluminum and aluminofluoride compounds on the brain and spinal cord. This mechanism involves activation of the brain's innate immune system, primarily the microglia, astrocytes, and macrophages, with a release of neurotoxic concentrations of excitotoxins and proinflammatory cytokines, chemokines, and immune mediators. Many studies suggest that excitotoxicity plays a significant role in the neurotoxic action of several metals, including aluminum. Recently, researchers have found that while most of the chronic pathology involved in the observed neurodegenerative effects of these metals are secondary to prolonged inflammation, it is the enhancement of excitotoxicity by the immune mediators that are responsible for most of the metal's toxicity. This enhancement occurs through a crosstalk between cytokines and glutamate-related mechanisms. The author coined the name immunoexcitotoxicity to describe this process. This paper reviews the evidence linking immunoexcitotoxicity to aluminum's neurotoxic effects and that a slow accumulation of aluminum may be the cause of neurodevelopmental defects as well as neurodegeneration in the adult. [ABSTRACT FROM AUTHOR]

This study proposed three types of AleHf reactive materials with particle size ratios (a), which were almost completely dense (porosity of <5.40%) owing to their preparation using hot-pressing technology. Microstructure characteristics and phase composition were analyzed, and the influence of particle size ratios on dynamic mechanical behavior and damage mechanism were investigated. The prepared sample with a - 0.1 exhibited continuous wrapping of the Hf phase by the Al phase. HfeHf contact (continuous Hf phase) within the sample gradually increased with increasing a, and a small amount of fine Hf appeared for the sample with a - 1. The reactive materials exhibited clear strain-rate sensitivity, with flow stress s0.05 and failure strain ef increasing approximately linearly with increasing strain rate _e. It is found that the plastic deformation of the material increased with increasing strain rate. As a increased from 0.1 to 1, the flow stress gradually increased. Impact failure of the material was dominated by ductile fracture with a large Al phase plastic deformation band for lower a, while brittle fracture with crushed Hf particles occurred at higher a. Finally, a constitutive model based on BP neural network was proposed to describe the stress-strain relationships of the materials, with an average relative error of 2.22%. [ABSTRACT FROM AUTHOR]

Background Immature hypertrophic scar complicated with contracture, disability, disfigurement, social embarrassment, pain, itching, residual scar, and prolonged maturation period. Various treatments for immature hypertrophic scar are used with limitations for each treatment. Objective To evaluate the efficacy and safety of combined fractional carbon dioxide (CO2) and Neodymium-doped Yttrium Aluminum Garnet (Nd:YAG) lasers for the treatment of immature hypertrophic scar both clinically and histopathologically. Patients and methods Total of 30 patients with single or multiple immature hypertrophic scars. The single scar was not less than 14cm in length. In the same patient, single or multiple scars were divided randomly into treated areas and control areas. The treated areas were submitted to 5 sessions of fractional CO2 laser combined with long pulsed Nd:YAG laser, one month in between sessions, the control areas did not receive any treatment. Vancouver Scar Scale (VSS) and patient and observer scar assessment scale (POSAS) were used for clinical evaluation before, 3, and 6 months after treatment. Collagen area percent, elastin area percent, and epidermal thickness were assessed histopathologically before and 3 months after treatment. Results The scar areas treated with combined fractional CO2 laser and long pulsed Nd:YAG laser showed superior significant clinical improvement with VSS and POSAS than areas did not receive any treatment (except for the pigmentation parameter of both VSS and POSAS), especially 6 months after last treatment without significant side effects for laser therapy. Opinions of the patients showed superior significant improvement in laser treated areas than areas did not receive any treatment. Epidermal thickness, collagen area percent and elastin area percent showed superior significant improvement in laser treated areas than areas did not receive any treatments three months after last laser session. Conclusion Combined treatment of immature hypertrophic scar with fractional CO2 and Nd: YAG lasers is effective, tolerable, and safe. [ABSTRACT FROM AUTHOR]

Background: Alzheimer's disease (AD) is the most prevalent neurodegenerative and remains incurable. Aluminum is a potent neurotoxin associated with AD. The main pathological features of AD are extracellular amyloid-β protein deposition and intracellular hyperphosphorylated Tau protein. A body of evidence suggest that oxidative stress and autophagy are involved in the pathogenesis of AD. Andrographis paniculata (AP) is a native plant with anti-inflammatory, anti-oxidative stress, and regulation of autophagy properties. AP significantly alleviated cognitive impairments, reduced Aβ deposition and has neuroprotective effect. However, its effects on aluminum-induced AD model have not been studied much. In this study, we investigated whether AP protect against aluminum-induced neurotoxicity through regulation of p62-Kelch-like ECH-associated protein 1(Keap1)-Nuclear factor E2 related factor 2 (Nrf2) pathway and activation autophagy in vivo and in vitro. Methods: UPLC-ESI-qTOF-MS/MS was used to identify the chemical constituents of AP ethanol extract. The mice with cognitive deficit were established by injecting aluminum chloride and D-galactose, and treated with either AP extract (200, 400, or 600 mg/kg/d) or andrographolide (2 mg/kg/2d).The spatial memory ability was detected by Morris water maze, HE staining were used to detect in brain tissue,Oxidative stress indexs and SOD activity in both serum and brain tissue were detected by kit.The expression of p62-Nrf2 pathway proteins were measured via western blotting. Furthermore, the neurotoxicity model was induced by aluminum maltolate (700 µM) in PC12 cells. Following AP and andrographolide treatment, the cell viability was detected. The relevant mRNA and protein expressions were detected in cells transfected with the p62 siRNA. Results: The main active components of AP included andrographolide, neoandrographolide and deoxyandrographolide as identified. AP and andrographolide significantly improved the spatial memory ability of mice, attenuated pathological changes of hippocampal cells, reduced the level of malondialdehyde, and increased superoxide dismutase activity in serum or brain tissue as compared to model control. In addition, the Nrf2, p62 and LC3B-II proteins expression were increased, and p-Tau and Keap1 proteins were decreased in the hippocampus after AP and andrographolide treatment.Furthermore, AP increased aluminum maltolate-induced cell viability in PC12 cells. Silencing p62 could reverse the upregulation expression of Nrf2 and downregulation of Keap1 and Tau proteins induced by AP in aluminum maltolate-treated cells. Conclusions: AP had neuroprotective effects against aluminum -induced cognitive dysfunction or cytotoxicity, which was involved in the activation of the p62-keap1-Nrf2 pathway and may develop as therapeutic drugs for the treatment of AD. However, this study has certain limitations, further optimize the protocol or model and study the molecular mechanism of AP improving AD. [ABSTRACT FROM AUTHOR]

The article "Hidden Lethal Hazard: Aluminum Phosphide Incidents in Türkiye" published in Thoracic Research & Practice discusses the toxic nature of aluminum phosphide (AlP) and its potential health risks. The incidents highlighted in the article include a fire at a port in Kocaeli, unauthorized use for bedbug control in Ankara, and an explosion in Kocaeli caused by AlP reacting with water. The article emphasizes the importance of preventing accidental exposure to phosphine gas and the need for strict regulations and safety measures in handling and storing AlP to avoid such incidents in the future. [Extracted from the article]

Single crystals of five compounds with approximate compositions ~Ru16(Al0.78Si0.22)47, (I), ~Ru9(Al0.70Si0.30)32, (II), ~Ru10(Al0.67Si0.33)41, (III), ~Ru(Al0.57Si0.43)5, (IV), and ~Ru2(Al0.46Si0.54)9, (V), were obtained from polycrystalline lumps mainly composed of the target compounds, and their crystal structures were determined by means of single-crystal X-ray diffraction. The crystal structure of (I) can be related to that of a cubic rational crystalline approximant to an icosahedral quasicrystal through crystallographic shear and then unit-cell twinning. The crystal structure of (II) is isotypic with that of a phase with composition ~Fe9(Al,Si)32. The crystal structure of (III) is comprised of edge-sharing Ru(Al,Si)9-11 polyhedra with disordered chains along edges of polyhedra. The crystal structure of (IV) is of the LiIrSn4 type. The crystal structure of (V) can be viewed as a crystallographic shear structure derived from that of (IV). [ABSTRACT FROM AUTHOR]

The grain boundary, solid solution, and precipitation strengthening mechanisms are important for controlling the mechanical properties of Al-based alloys. Due to severe plastic deformation, mechanical alloying refines grain structure to a nanoscale level which leads to a strong increase in solute content and the related strengthening effect of solute atoms and secondary-phase precipitates. This study analyzed the elemental Mn and Al6Mn phase dissolution in Al during high-energy ball milling. For this purpose, XRD data, microstructure, and hardness evolutions were compared for two Al—5.2 at% Mn alloys prepared by mechanical alloying using elemental Al and Mn powders and a pre-melted master alloy. In the two-phase master alloy, containing the Al solid solution and the Al6Mn phase, the strain accumulation, grain refinement, solid solution supersaturation, and milling-induced hardening effects were facilitated. Both elemental Mn and intermetallic compound were dissolved during mechanical alloying, and the maximum solute content was near 3.1 at% Mn. A fine crystalline size of ~25 nm and the maximum Mn solute content were observed after milling of elemental powders and the master alloy for 60 h and 20 h, respectively. The microhardness of ~3 GPa corresponded to a ~3.1% solute Mn content, and the microhardness increased to ~5 GPa after long–term milling due to precipitation strengthening effect of the secondary Al6Mn phase in the master alloy. [ABSTRACT FROM AUTHOR]

Background: This research aimed to evaluate the clinico-epidemiological profile and short-term outcomes of patients admitted to the emergency department of a tertiary hospital. Materials and Methods: This prospective observational cross-sectional study was conducted between January 1, 2021, and June 30, 2022, in the Emergency Department of a tertiary hospital. Patients of either gender of any age attending the emergency department with acute poisoning were included. These cases were analyzed for their epidemiological profiles, poisoning characteristics, and various clinical variables influencing patient outcomes. Results: Out of a total of 236 patients, 190 patients (80.5%) were aged more than 18 years. Comorbidities were present in 32 (13.5%) patients, and psychiatric illness was the most common comorbidity. The intention of poisoning was suicidal in 185 patients (78.4%) and accidental in 51 patients (21.6%). Organophosphate was the most common poisoning seen in 55 patients (23.3%), followed by drug ingestion seen in 44 patients (18.6%). Twenty-eight patients (11.8%) were transferred to the intensive care unit. Nineteen patients (8.1%) required mechanical ventilation. There were ten deaths (4.2%) in the study population. Aluminum phosphide poisoning was associated with the highest mortality rate, followed by organophosphate poisoning. Conclusions: This study indicates that most poisoning cases involved young people, mainly males. Organophosphorus poisoning was one of the most common poisonings, followed by the ingestion of drugs in this part of the world. Aluminum phosphide had the highest fatality rate. [ABSTRACT FROM AUTHOR]

PurposeThe αvβ6-BP peptide selectively targets the integrin αvβ6, a cell surface receptor recognized as a prognostic indicator for several challenging malignancies. Given that the 4-[18F]fluorobenzoyl (FBA)-labeled peptide is a promising PET imaging agent, radiolabeling via aluminum [18F]fluoride chelation and introduction of an albumin binding moiety (ABM) have the potential to considerably simplify radiochemistry and improve the pharmacokinetics by increasing biological half-life.ProceduresThe peptides NOTA-αvβ6-BP (1) and NOTA-K(ABM)-αvβ6-BP (2) were synthesized on solid phase, radiolabeled with aluminum [18F]fluoride, and evaluated in vitro (integrin ELISA, albumin binding, cell studies) and in vivo in mouse models bearing paired DX3puroβ6 [αvβ6(+)]/DX3puro [αvβ6(-)], and for [18F]AlF 2, BxPC-3 [αvβ6(+)] cell xenografts (PET imaging, biodistribution).ResultsThe peptides were radiolabeled in 23.0 ± 5.7 % and 22.1 ± 4.4 % decay-corrected radiochemical yield, respectively, for [18F]AlF 1 and [18F]AlF 2. Both demonstrated excellent affinity and selectivity for integrin αvβ6 by ELISA (IC50(αvβ6) = 3-7 nM vs IC50(αvβ3) > 10 μM) and in cell binding studies (51.0 ± 0.7 % and 47.2 ± 0.7 % of total radioactivity bound to DX3puroβ6 cells at 1 h, respectively, vs. ≤ 1.2 % to DX3puro for both compounds). The radiotracer [18F]AlF 1 bound to human serum at 16.3 ± 1.9 %, compared to 67.5 ± 1.0 % for the ABM-containing [18F]AlF 2. In vivo studies confirmed the effect of the ABM on blood circulation (≤ 0.1 % ID/g remaining in blood for [18F]AlF 1 as soon as 1 h p.i. vs. > 2 % ID/g for [18F]AlF 2 at 6 h p.i.) and higher αvβ6(+) tumor uptake (4 h: DX3puroβ6; [18F]AlF 1: 3.0 ± 0.7 % ID/g, [18F]AlF 2: 7.2 ± 0.7 % ID/g; BxPC-3; [18F]AlF 2: 10.2 ± 0.1 % ID/g).ConclusionBoth compounds were prepared using standard chemistries; affinity and selectivity for integrin αvβ6 in vitro remained unaffected by the albumin binding moiety. In vivo, the albumin binding moiety resulted in prolonged circulation and higher αvβ6-targeted uptake.

Aluminum-based adjuvants (ABAs) are used in human vaccines to enhance the magnitude of protective immune responses elicited against specific pathogens. One hypothesis is that stress signals released by aluminum-exposed necrotic cells play a role in modulating an immune response that contributes to the adjuvant's effectiveness. We hypothesized that aluminum adjuvant-induced necrosis would be similar irrespective of cellular origin or composition of the adjuvant. To test this hypothesis, human macrophages derived from peripheral monocytic cell line (THP-1) and cells derived from the human brain (primary astrocytes) were evaluated. Three commercially available formulations of ABAs (Alhydrogel, Imject alum, and Adju-Phos) were examined. Alum was also used as a reference. Cell viability, reactive oxygen species formation, and production of tumor necrosis factor alpha (TNF-α) and interleukin-6 (IL-6) were quantified. Cells were exposed to different concentrations (10-100 μg/mL) of the adjuvants for 24 h or 72 h. The two FDA approved adjuvants (Alhydrogel and Adju-Phos) decreased cell viability in both cell types. At the 72 h time point, the decrease in viability was accompanied with increased ROS formation. The size of the aluminum agglomerates was not relatable to the changes observed. After exposure to ABAs, astrocytes and macrophages presented a distinct profile of cytokine secretion which may relate to the function and unique characteristics of each cell type. These variations indicate that aluminum adjuvants may have differing capability of activating cells of different origin and thus their utility in specific vaccine design should be carefully assessed for optimum efficacy.

A sensitive and selective mixed hemimicelles solid phase extraction magnetic material based on sodium dodecyl sulfate-coated magnetite (Fe.sub.3O.sub.4)/alumina (Al.sub.2O.sub.3) is proposed for the preconcentration and determination of atrazine and simazine. Atrazine and simazine were preconcentrated on the composite solid phase as an adsorbent and then determined by high performance liquid chromatography. Several parameters influencing the recoveries of the analytes were investigated. The experimental results showed that it was possible to obtain the highest extraction efficiency when the solution pH and extraction time were 1.5 and 1 min, respectively, using 100 mL of validation solution containing 1.0 [mu]g of triazines and 1 mL of acetonitrile as an eluent. Recoveries of atrazine and simazine were 72 ± 1% and 77 ± 3% with relative standard deviations for 5 determinations of 1.6 and 3.8%, respectively, under optimum conditions. The linear ranges of calibration curves for triazines were from 1 to 20 ng/mL with correlation coefficients of 0.995 (atrazine) and 0.991 (simazine) and the detection limits (signal-to-noise ratio of 3) were 0.11 and 0.17 ng/mL for atrazine and simazine, respectively. The proposed method was successfully applied to the determination of triazines in environmental water samples such as river, tap and pond waters with high precision and accuracy., Author(s): Hideyuki Katsumata [sup.1], Tomoko Kawanishi [sup.1], Mai Furukawa [sup.1], Ikki Tateishi [sup.2], Satoshi Kaneco [sup.1] [sup.2] Author Affiliations: (1) grid.260026.0, 0000 0004 0372 555X, Department of Chemistry for Materials, [...]

Aluminum, the third most abundant metal present in the earth's crust, is present almost in all daily commodities we use, and exposure to it is unavoidable. The interference of aluminum with various biochemical reactions in the body leads to detrimental health effects, out of which aluminum-induced neurodegeneration is widely studied. However, the effect of aluminum in causing dyslipidemia cannot be neglected. Dyslipidemia is a global health problem, which commences to the cosmic of non-communicable diseases. The interference of aluminum with various iron-dependent enzymatic activities in the tri-carboxylic acid cycle and electron transport chain results in decreased production of mitochondrial adenosine tri-phosphate. This ultimately contributes to oxidative stress and iron-mediated lipid peroxidation. This mitochondrial dysfunction along with modulation of α-ketoglutarate and L-carnitine perturbs lipid metabolism, leading to the atypical accumulation of lipids and dyslipidemia. Respiratory chain disruption because of the accumulation of reduced nicotinamide adenine di-nucleotide as a consequence of oxidative stress and the stimulatory effect of aluminum exposure on glycolysis causes many health issues including fat accumulation, obesity, and other hepatic disorders. One major factor contributing to dyslipidemia and enhanced pro-inflammatory responses is estrogen. Aluminum, being a metalloestrogen, modulates estrogen receptors, and in this world of industrialization and urbanization, we could corner down to metals, particularly aluminum, in the development of dyslipidemia. As per PRISMA guidelines, we did a literature search in four medical databases to give a holistic view of the possible link between aluminum exposure and various biochemical events leading to dyslipidemia. [ABSTRACT FROM AUTHOR]

Today, climate change is exacerbating the problems of efficient and environmentally friendly use of acidic soils, which are widespread in Ukraine. At the same time, the role of mobile aluminium compounds in acidity formation is also becoming increasingly important. In this regard, chemical amelioration remains a primary and very important factor in the system of resource-saving and environmentally friendly agricultural measures for the efficient and balanced use of acidic soils. Therefore, the main objective of the research is to establish scientifically sound doses of chemical ameliorant that reduce the content of mobile aluminium compounds and ensure environmental safety and high productivity of agrocenoses on Albic Pantostagnic Luvisol. The research was carried out in a long-term stationary experiment established in 1965 with different doses of mineral fertilisers, manure and lime on an Albic Stagnic Luvisol. It was found that with a prolonged application of mineral fertilisers and the use of this soil without fertilisers, the content of mobile aluminium compounds at the end of the X rotation at pHKCl 4.20 and 4.42 was 68.4 and 58.5 mg kg-1 respectively. Under the organo-mineral and mineral fertilisation systems with liming with 6.0 t ha-1 of CaCO3 calculated by hydrolytic acidity, the content of mobile aluminium compounds decreased to 7.2 and 6.7 mg kg-1 of soil respectively. Under identical fertilisation systems with a lime application by pH-buffering capacity (2.5 t ha-1 CaCO3), the content of mobile aluminium compounds is 10.8-10.0 mg kg-1 soil. [ABSTRACT FROM AUTHOR]

In this study, the structural integrity of mullite (3Al2O3·2SiO2) films, deposited on silicon carbide (SiC) substrates using chemical vapor deposition (CVD), was investigated via increasing load nanoscratch tests. The films were configured by mullite columns of stoichiometric composition growing from a silica-rich layer in contact with the SiC substrate. Controlled damage was induced in the 3Al2O3·2SiO2 films at relatively low scratch loads. Radial and lateral cracking were applied until final delamination and repeated chipping were achieved as the load increased. The intrinsic integrity of the 3Al2O3∙2SiO2 film and the performance of the coated 3Al2O3·2SiO2/SiC system, regarded as a structural unit, were analyzed. With the aid of advanced characterization techniques at the surface and subsurface levels, the configuration and morphology of the damage induced in the coated system by the nanoscratch tests were characterized, and the scratch damage micromechanisms were identified. Finally, the adhesion of the film, in terms of energy of adhesion and interfacial fracture toughness, was determined using different models proposed in the literature. The results from this investigation contribute to the understanding of the mechanical performance and structural integrity of EBC/SiC-based systems, which over the past few years have increasingly been implemented in novel applications for gas turbines and aircraft engines. [ABSTRACT FROM AUTHOR]

Aluminum compounds are the most widely used adjuvants in veterinary and human vaccines. Despite almost a century of use and substantial advances made in recent decades about their fate and biological effects, the exact mechanism of their action has been continuously debated, from the initial "depot-theory" to the direct immune system stimulation, and remains elusive. Here we investigated the early in vitro response of primary human PBMCs obtained from healthy individuals to aluminum oxyhydroxide (the most commonly used adjuvant) and a whole vaccine, in terms of internalization, conventional and non-conventional autophagy pathways, inflammation, ROS production, and mitochondrial metabolism. During the first four hours of contact, aluminum oxyhydroxide particles, with or without adsorbed vaccine antigen, (1) were quickly recognized and internalized by immune cells; (2) increased and balanced two cellular clearance mechanisms, i.e. canonical autophagy and LC3-associated phagocytosis; (3) induced an inflammatory response with TNF-α production as an early event; (4) and altered mitochondrial metabolism as assessed by both decreased maximal oxygen consumption and reduced mitochondrial reserve, thus potentially limiting further adaptation to other energetic requests. Further studies should consider a multisystemic approach of the cellular adjuvant mechanism involving interconnections between clearance mechanism, inflammatory response and mitochondrial respiration. [ABSTRACT FROM AUTHOR]