Notes

Cytotoxic effects of dental care calculus contaminants as well as freeze-dried Aggregatibacter actinomycetemcomitans and Fusobacterium nucleatum about HSC-2 dental epithelial cells as well as THP-1 macrophages.
The morphology of the formed photocatalyst/electrocatalyst hybrid, inclusive of its localized activity toward the water oxidation reaction, was simultaneously probed. A photoanode surface comprising CuWO4/BiVO4/FeOOH was further prepared in this study and investigated. It was found that the localized photoactivity truly reflects the activity of the local area, differs from region to region, and is contingent on the morphology of the surface. Moreover, the Pt UME is determined as an efficient probe to analyze the photoactivity of the PEC water splitting reaction. This work highlights the novel SPECM technique for enhancement and examination of the catalytic activity of the nanostructured materials.We report the preparation of porous hydrous zirconia by treatment of zirconium-based metal-organic framework (MOF) UiO-66 with a strong base. Microporosity of the original MOF was partially retained in the resultant porous hydrous zirconia. NiII centers were then adsorbed onto the OH-rich hydrous zirconia and in situ converted to highly dispersed Ni0 for CO2 hydrogenation to CH4. The activated catalyst after an induction period showed a turnover frequency of 345 h-1 or a space-time yield of 5851 mmol·gNi-1·h-1 with a CH4 selectivity of over 99%. The catalyst was tested for 100 h on stream, showing only a 4% decrease in activity, and was found to convert atmospheric CO2 to CH4 via CO2 collection through Na2CO3/NaHCO3 cycling. Thermal decomposition of NaHCO3 released CO2 for hydrogenation to CH4, and the resultant Na2CO3 absorbed CO2 from air to form NaHCO3. This work highlights the opportunity in using MOFs as precursors to prepare highly porous metal oxide/hydroxide supports for solid-gas phase catalysis.The past few decades have witnessed the unprecedented success of the commercialized LiCoO2 layered cathode in consumer electronics, but it still faces the poor rate capability and cycling performance because of its hexagonal layered α-NaFeO2 structure and the high energy of electrochemically active crystal planes. In a bid to address these problems, we report the delicate design and synthesis of hierarchical fusiform LiCoO2 microrods constructed by directionally assembled nanoplatelets along the [001] direction via a self-template route (PAHF-LCO). Remarkably, it is the first time that almost all the exposed surfaces of layered cathodes are dominated by the consistent 010 facets, which enable the express channels of Li+ diffusion to penetrate throughout the entire fusiform microrods. The as-obtained PAHF-LCO cathode material delivers specific capacities of 113 and 106 mA h g-1 at 10 and 20 C after 200 cycles, respectively. Even under the high rate of 50 C, the discharge capacity initializes around 105 mA h g-1 and ends around 80 mA h g-1 after 200 cycles. The improvement mechanisms to the high-rate performance through crystal habit tuning have also been unraveled. The enhanced electrochemical performance can be attributed to the hierarchical fusiform structure as well as the coordinated crystal orientation of 010 facets.The applications of scintillating fiber in high-resolution medical imaging, remote radiation monitoring, and microbeam radiation therapy have raised a growing demand of bismuth-germanate (BGO) glass fiber. However, the task of construction of colorless BGO glass fiber has been met with limited success. Here, we present a renewable process that can help to achieve BGO scintillating fiber, based on glass relaxation and crystallization mediated dissolution of unexpected Bi center. The experimental results indicate that the strategy can improve the optical transmittance up to more than 73.17% at 483 nm, which is ∼6.28 times higher than that of the conventional material. Importantly, the obtained nanostructured BGO exhibits bright visible luminescence under excitation with X-ray. Furthermore, it can host various types of rare-earth dopants, and the radiation-induced luminescence can be tuned in a wide waveband region from visible to infrared waveband. In addition, colorless BGO fiber with bright emission is also successfully constructed, and the radiation probing test demonstrates the achievement of ∼19.48 times improvement in the detection sensitivity. Our results highlight the approach based on the dynamic glass relaxation may provide new opportunities for construction of scintillating glass fiber and compact radiation fiber detector.Developing cost-efficient electrocatalysts for ambient N2-to-NH3 conversion and revealing the reaction mechanism are appealing yet challenging tasks. Some transition metal oxides have been recently used to catalyze the nitrogen reduction reaction (NRR), but their further applications are greatly impeded because of their questionable conductivity, poor dispersion, limited active sites, and so forth. Herein, three-dimensional Ni foam-supported urchin-like Al-doped Co3O4 nanospheres rich in surface oxygen vacancies (Al-Co3O4/NF) were prepared via a hydrothermal process and subsequent annealing treatment. It is shown that introducing Al atoms into Co3O4 effectively tunes the electronic properties of the catalyst, and the increased surface oxygen vacancies induced by Al doping facilitate the activation of nitrogen. What is more, this urchin-like nanostructure, demonstrating an ability to limit the coalescence of gas bubbles, enables the rapid removal of small gas bubbles and better exposure of active sites to N2, thus yielding an impressive ammonia electrosynthesis activity (NH3 yield rate 6.48 × 10-11 mol s-1 cm-2; Faradaic efficiency 6.25%) in 0.1 M KOH. Electrochemical-based in situ Fourier transform infrared spectroscopy was employed to study the mechanism of NRR, indicating an associative alternating pathway.Piezocatalysts have attracted much attention due to their excellent degradation ability for organics. In this work, three types of BaTiO3 (BTO) nanostructures, including hydrothermally synthesized nanocubes (NCs), sol-gel calcined nanoparticles (NPs), and electrospun nanofibers (NFs), are prepared for catalyzing the dye degradation. Compared with the NCs and NPs, the NFs exhibit a higher piezocatalytic degradation performance due to the large specific surface area, fine crystal size, and easy deformation structure. Moreover, the kinetic factors, including initial dye concentration, ionic strength, ultrasonic power, and applied action, influencing the degradation performance of the BTO NFs are analyzed deeply. A high degradation rate constant of 0.0736 min-1 is achieved for rhodamine B, which is superior compared with the previous reports. The excellent stability of BTO NFs is demonstrated by the cycling tests, where a high degradation efficiency of 97.6% within 110 min is still obtained after the third cycle. Furthermore, the mechanism of piezocatalysis revealed that the hydroxyl and superoxide radicals are the main reactive species in the degradation process. This work is of importance for the development of high-performance piezocatalysts and highlights the potential of piezocatalysis for water remediation.in English, French Contexte L’hypertension intracrânienne (HTIC) idiopathique est une affection rare qui touche surtout les femmes atteintes d’obésité en âge de procréer. Les symptômes courants sont des maux de tête, des troubles de la vue, des acouphènes pulsatiles et un oedème papillaire. Le lien entre l’HTIC idiopathique et l’obésité est bien établi dans la littérature, ce qui suggère que la perte de poids pourrait améliorer le tableau clinique de l’HTIC. Pour les patients atteints d’obésité sévère pour lesquels le traitement conservateur ne fonctionne pas, la chirurgie bariatrique est un moyen efficace de perdre du poids. selleck Cette revue systématique de la littérature vise à déterminer l’efficacité de la chirurgie bariatrique dans le traitement de l’HTIC idiopathique. Méthodes Nous avons interrogé MEDLINE, Embase, Scopus, la Bibliothèque Cochrane et Web of Science (limites études portant sur les humains publiées en anglais entre janvier 1946 et juillet 2015). Résultats Douze études primaires (n = 39 patients) ont été incluses dans la revue systématique. Tous les patients avaient un diagnostic préopératoire d’HTIC idiopathique. L’indice de masse corporelle (IMC) préopératoire était de 47,4 ± 3,6 kg/m2 ; l’IMC est passé à 33,7 ± 2,1 kg/m2 6 mois après l’opération, puis à 33,9 ± 11,6 kg/m2 12 mois après l’opération. Les pressions d’ouverture des ponctions lombaires sont passées de 34,4 ± 6,9 cmH2O à 14,0 ± 3,6 cmH2O après l’opération. Les symptômes courants de l’HTIC idiopathique se sont améliorés après la chirurgie bariatrique maux de tête (100% avant opération c. 10% après), troubles de la vue (62% c. 44%), acouphènes pulsatiles (56% c. 3%) et œdème papillaire (62% c. 8%). Conclusion La chirurgie bariatrique semble améliorer considérablement les symptômes d’HTIC idiopathique. Cette affection n’est pas une comorbidité bien connue de l’obésité, mais sa présence peut être une indication pour la chirurgie bariatrique comme traitement.in English, French La réduction du nombre de personnes en attente d’une greffe de foie qui décèdent avant la transplantation demeure un défi important en raison de la pénurie d’organes. On remarque actuellement une tendance à la hausse dans l’utilisation de greffons de foie provenant de don après décès circulatoire (DDC) dans le but d’élargir le bassin de donneurs. Ces greffons marginaux sont toutefois associés à des taux de complications plus élevés, particulièrement pour ce qui est des complications biliaires. De plus, de nombreux foies obtenus à la suite d’un DDC sont jugés inadmissibles à la greffe. Malgré ces restrictions, les greffons provenant de DDC représentent une importante ressource pour atténuer la pénurie d’organes. Des initiatives de recherche sont donc actuellement en cours dans le but d’améliorer leur taux d’utilisation et les issues des transplantations. Nous analysons ici l’état actuel des progrès pour les transplantations de foie provenant de DDC.AIM To determine the complexity of urinary stones from the standpoint of endoscopic surgery in order to create the standard for the postoperative course of endoscopic surgery for urolithiasis. MATERIAL AND METHODS A total of 1317 endoscopic operations (PNL, URS), performed for upper urinary tract stones, were analyzed. Treatment results of 290 patients were studied prospectively, taking into account a stone density, determined by MSCT using HU scale. In 1027 patients, results were studied retrospectively, with a consideration of stone quantitative characteristics, size and shape. RESULTS According to the study, stone density does not have a significant impact on the frequency and severity of complications and the efficacy of endoscopic treatment for urolithiasis. The number of stones, their size and stereometric configuration have a significant influence on the surgical procedure. From the position of endoscopic interventions, single upper urinary tract stones were determined as "simple", while multiple and staghorn stones were considered as "complexed" cases. CONCLUSION The "standard of the postoperative period" of endoscopic surgery for urolithiasis created with a consideration of specific features of endoscopic surgery for urolithiasis and the complexity of urinary stones is proved to be objective. Any deviation in the postoperative period from the standard course should be regarded as a complication and it is necessary to systematize them according to the Clavien-Dindo classification.
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