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Renata Falchete do Prado, Gabriela Campos Esteves, Evelyn Luzia De Souza Santos, Daiane Acácia Griti Bueno, Carlos Alberto Alves Cairo, Luis Gustavo Oliveira De Vasconcellos, Renata Silveira Sagnori, Fernanda Bastos Pereira Tessarin, Felipe Eduardo Oliveira, Luciane Dias De Oliveira, Maria Fernanda Lima Villaça-Carvalho, Vinicius André Rodrigues Henriques, Yasmin Rodarte Carvalho, Luana Marotta Reis De Vasconcellos
Titanium (Ti) and Ti-6 Aluminium-4 Vanadium alloys are the most common materials in implants composition but β type alloys are promising biomaterials because they present better mechanical properties. Besides the composition of biomaterial, many factors influence the performance of the biomaterial. For example, porous surface may modify the functional cellular response and accelerate osseointegration. This paper presents in vitro and in vivo evaluations of powder metallurgy-processed porous samples composed by different titanium alloys and pure Ti, aiming to show their potential for biomedical applications...
2018: PloS One
Dhanjay Sharma, A Sakthivel
Uniformly dispersed Rh nanoparticles on silicate intercalated magnesium-aluminium hydrotalcite were prepared for the first time by an incipient wetness method. FT-IR and powder XRD studies confirmed the presence of a layered structure even after Rh loading. Uniform distribution of Rh nanoparticles on HT materials was confirmed by HR-TEM. The resultant Rh nanoparticle supported HT materials showed good catalytic activity for hydroisomerization of 1-octene.
January 1, 2018: Journal of Nanoscience and Nanotechnology
Alexandra Ya Freidzon, Ilia A Kurbatov, Vitaliy I Vovna
The energy levels of Ln3+ ions are known to be only slightly dependent on the ion environment. This allows one to predict the spectra of f-f transitions in Ln3+ complexes using group theory and simple semiempirical models: Russell-Saunders scheme for spin-orbit coupling, ligand-field theory for the splitting of the electronic levels, and Judd-Ofelt parameterization for reproducing the intensity of f-f transitions. Nevertheless, a fully ab initio computational scheme employing no empirical parameterization and suitable for any asymmetrical environment of Ln3+ would be instructive...
May 16, 2018: Physical Chemistry Chemical Physics: PCCP
Myung-Jin Lim, Mi-Kyung Yu, Kwang-Won Lee
Objectives: This study investigated the effect of continuous application of 10-methacryloyloxydecyldihydrogen phosphate (MDP)-containing primer and luting resin cement on bond strength to tribochemical silica-coated yttria-stabilized tetragonal zirconia polycrystal (Y-TZP). Materials and Methods: Forty bovine teeth and Y-TZP specimens were prepared. The dentin specimens were embedded in molds, with one side of the dentin exposed for cementation with the zirconia specimen...
May 2018: Restorative Dentistry & Endodontics
Vladimir V Burlakov, Vyacheslav S Bogdanov, Perdita Arndt, Anke Spannenberg, Uwe Rosenthal, Torsten Beweries, Vladimir B Shur
The crystal structure of the title zwitterionic zirconocene complex containing a furan-one unit, [AlZr(C10 H15 )2 (C4 H9 )3 (C9 H18 O2 Si2 )], is reported. On reacting a zircona-furan-one with two equivalents of HAl( i -Bu)2 , disproportionation of the Lewis acid results in the formation of a triiso-butyl-aluminium fragment, Al( i -Bu)3 , which coordinates to the exocyclic carbonyl O atom of the zircona-furan-one ring. Single-crystal X-ray diffraction reveals that the zircona-furan-one ring remains intact with coordination of the aluminium to the exocyclic O atom...
April 1, 2018: Acta Crystallographica. Section E, Crystallographic Communications
Manel Sonni, Imen Jendoubi, Mohamed Faouzi Zid
The title compound, sodium chromium/aluminium molybdenum/aluminium dodeca-oxide, Na0.72 Cr0.48 Al1.74 Mo2.77 O12 , was prepared by solid-state reaction. Its crystal structure is related to NaSICON-type compounds. The framework is built up from M 1O6 ( M 1 = Cr/Al) octa-hedra and M 2O4 ( M 2 = Mo/Al) tetra-hedra inter-connected by corners. The three-dimensional framework contains cavities in which sodium cations are located. Two validation models (BVS and CHARDI) were used to confirm the proposed structural model...
March 1, 2018: Acta Crystallographica. Section E, Crystallographic Communications
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No abstract text is available yet for this article.
May 2018: Nature
Anna Baranik, Anna Gagor, Ignasi Queralt, Eva Marguí, Rafal Sitko, Beata Zawisza
Alumina supported on graphene oxide (Al2 O3 /GO) nanocomposite as new nanosorbent in dispersive micro-solid phase extraction (DMSPE) for As(V) and Cr(III) preconcentration is described. The crucial issue of the study is synthesis of novel nanocomposite suitable for sorption of selected species of arsenic and chromium. Al2 O3 /GO demonstrates selectivity toward arsenates in the presence of arsenites at pH 5 and chromium(III) ions in the presence of chromate anions at pH 6. The Al2 O3 /GO nanocomposite was characterized by scanning electron microscopy (SEM) transmission electron microscopy (TEM), powder X-ray diffraction (XRD) and the Raman spectroscopy...
August 1, 2018: Talanta
Young-Jun Choi, Jung Yup Kim, Jae-Hui Nam, Ga-Young Lee, Won-Serk Kim
BACKGROUND: Currently no study has evaluated the effect of the novel 1064-nm picosecond neodymium-doped:yttrium aluminium garnet laser (ps-Nd:YAG) for reducing Hypertrophic scarring (HS). OBJECTIVE: The aim of this study was to verify the efficacy and safety of a 1064-nm ps-Nd:YAG in the management of HS. MATERIALS AND METHODS: A retrospective chart review and photographic analysis were conducted on patients treated with a low-fluence 1064-nm ps-Nd:YAG for HS improvement...
May 14, 2018: Journal of Cosmetic and Laser Therapy: Official Publication of the European Society for Laser Dermatology
Dongjie Jia, Fei Shen, Yi Wang, Ting Wu, Xuefeng Xu, Xinzhong Zhang, Zhenhai Han
Many efforts have been made to map quantitative trait loci (QTLs) to facilitate practical marker-assisted selection (MAS) in plants. In the present study, we identified four genome-wide major QTLs responsible for apple fruit acidity by MapQTL and BSA-seq analyses using two independent pedigree-based populations. Candidate genes were screened in major QTL regions, and three functional gene markers, including a non-synonymous A/G single nucleotide polymorphism (SNP) in the coding region of MdPP2CH, a 36-bp insertion in the promoter of MdSAUR37, and a previously reported SNP in MdALMTII, were validated to influence the malate content of apple fruits...
May 11, 2018: Plant Journal: for Cell and Molecular Biology
Clément Genet, Marie-Joëlle Menu, Olivier Gavard, Florence Ansart, Marie Gressier, Robin Montpellaz
The aim of our study is to improve the aluminium alloy corrosion resistance with Organic-Inorganic Hybrid (OIH) sol-gel coating. Coatings are obtained from unusual formulation with precursors mixing: glycidoxypropyltrimethoxysilane (GPTMS), zirconium (IV) propoxide (TPOZ) and aluminium tri-sec-butoxide (ASB). This formulation was characterized and compared with sol formulations GPTMS/TPOZ and GPTMS/ASB. In each formulation, a corrosion inhibitor, cerium (III) nitrate hexahydrate, is employed to improve the corrosion performance...
May 10, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Imen M'rad, Mustapha Jeljeli, Naima Rihane, Pascal Hilber, Mohsen Sakly, Salem Amara
Recently, the biosafety and potential influences of nanoparticles on central nervous system have received more attention. In the present study, we assessed the effect of aluminium oxide nanoparticles (Al2 O3 -NPs) on spatial cognition. Male Wistar rats were intravenously administered Al2 O3 -NP suspension (20 mg/kg body weight/day) for four consecutive days, after which they were assessed. The results indicated that Al2 O3 -NPs impaired spatial learning and memory ability. An increment in malondialdehyde levels with a concomitant decrease in superoxide dismutase activity confirmed the induction of oxidative stress in the hippocampus...
2018: EXCLI Journal
Bo Chen, Jie-Xin Wang, Dan Wang, Xiao-Fei Zeng, Stuart Clarke, Jian-Feng Chen
Transparent dispersions of inorganic nanoparticles are attractive materials in many fields. However, a facile method for preparing such dispersions of aluminium hydroxide nanoparticles is yet to be realized. Here, we report a direct reactive method to prepare transparent dispersions of pseudo-boehmite nanoparticles without any surface modification, and with an average particle size of 80 nm in length and 10 nm in width, as well as excellent optical transparency over 94% in the visible range. Furthermore, transparent dispersions of boehmite nanoparticles were also achieved after an additional hydrothermal treatment...
May 9, 2018: Nanotechnology
P Soleimani Roudi, A Golian, A Haghparast, M R Bassami, R Majidzadeh Heravi
This study was conducted to investigate the efficacy of in ovo administration of aluminium hydroxide (AH) and/or mannan oligosaccharide (MOS) adjuvants along with lentogenic VG/GA strain-Avinew to alleviate the embryonic pathogenicity of Newcastle disease virus. Six hundred and thirty fertilized Bovans eggs were divided into nine groups of 70 each incubated in a commercial hatchery and administered with eight types of in ovo injections in a factorial design of 2 × 2 × 2 including with/without AH, MOS and Newcastle disease vaccine (NDV), and one uninjected group on day 18 of incubation...
May 9, 2018: Journal of Animal Physiology and Animal Nutrition
M Fąk, H Rotsztejn, A Erkiert-Polguj
BACKGROUND: Microdermabrasion is a popular form of mechanical peel, used for many aesthetic purposes. Because it removes the superficial epidermal layer, it has an impact on hydrolipid skin coat. OBJECTIVE: The aim of the study was to examine the changes taking place in the hydrolipid coat of the skin after microdermabrasion measured by skin hydration and sebum level. METHODS: Sixteen healthy women were included in the study, and the aluminium oxide crystal microdermabrasion device was used over the entire face of each patient...
May 7, 2018: Skin Research and Technology
Zhihui Yang, Wei Shi, Weichun Yang, Lifen Liang, Wenbin Yao, Liyuan Chai, Shikang Gao, Qi Liao
Combining bioleaching by the gross biosurfactants of Burkholderia sp. Z-90 and flocculation by poly aluminium chloride (PAC) was proposed to develop a potential environment-friendly and cost-effective technique to remediate the severely contaminated soils by heavy metals. The factors affecting soil bioleaching by the gross biosurfactants of Burkholderia sp. Z-90 were optimized. The results showed the optimal removing efficiencies of Zn, Pb, Mn, Cd, Cu, and As by the Burkholderia sp. Z-90 leachate were 44.0, 32...
April 30, 2018: Chemosphere
Tanwi Priya, Prem Prakash, B K Mishra
In the present study, impact of coagulant activity of zirconium oxychloride and aluminium sulphate on the kinetics of chlorine consumption and trihalomethanes (THMs) formation has been delineated. Zirconium Oxychloride showed rapid chlorine decay within the first 30 min, which further achieved steady rate after 60 min, but in case of aluminium sulphate chlorine consumption has been increased drastically throughout the chlorine decay. Zirconium oxychloride has effectively reduced significant amount of slow reducing agents (SRA) as well as fast reducing agents (FRA), which correspond to the rate of reduction in phenolic groups from water enriched with Natural Organic Matter (NOM) which eventually decreased trihalomethane mediated cancer risk by ~ 2...
May 3, 2018: Ecotoxicology and Environmental Safety
Rosa De Finis, Davide Palumbo, Livia Maria Serio, Luigi A C De Filippis, Umberto Galietti
The characterization of the fatigue behaviour of aluminium alloys is still capturing the attention of researchers. As it is well known in literature, for certain alloys, in a specific range of cycles number, the S-N curves do not present any asymptote. So that, problems result in the assessment of the fatigue life. In these conditions, the concept of the fatigue limit has to be replaced by the fatigue strength at a fixed number of loading cycles. Temperature acquisitions during fatigue tests allow for a specific analysis that can support the researchers in understanding the complex processes that are involved in fatigue and their influence on fatigue life, even for aluminium alloys...
May 2, 2018: Materials
F Khodabakhshi, M Nosko, A P Gerlich
Multipass friction-stir processing was employed to uniformly disperse multiwalled carbon nanotubes (MW-CNTs) within an Al-Mg alloy metal matrix. Decomposition of MW-CNTs occurs in situ as a result of solid-state chemical reactions, forming fullerene (C60) and aluminium carbide (Al4 C3 ) phases during reactive high temperature severe plastic processing. The effects of this decomposition on the microstructural features, dynamic restoration mechanisms and crystallographic microtextural developments are studied for the first time by using electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM) analysis...
May 3, 2018: Journal of Microscopy
Fabian Uddén, Matuba Filipe, Åke Reimer, Maria Paul, Erika Matuschek, John Thegerström, Sven Hammerschmidt, Tuula Pelkonen, Kristian Riesbeck
BACKGROUND: Chronic suppurative otitis media (CSOM) is an important cause of hearing loss in children and constitutes a serious health problem globally with a strong association to resource-limited living conditions. Topical antibiotics combined with aural toilet is the first-hand treatment for CSOM but antimicrobial resistance and limited availability to antibiotics are obstacles in some areas. The goal of this study was to define aerobic pathogens associated with CSOM in Angola with the overall aim to provide a background for local treatment recommendations...
May 3, 2018: Infectious Diseases of Poverty
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