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M Barbieri, F Mencio, P Papi, D Rosella, S Di Carlo, T Valente, G Pompa
OBJECTIVE: Over the years, different implant surfaces have been used to try to maximize bone to implant contact. The aim of this study was to compare levels of metallic ions and particles dissolution collected from two different dental implants surfaces immersed into human saliva. PATIENTS AND METHODS: A total of 60 dental implants were tested. Group A: sanded with aluminium oxide medium grade particles and acid-etched; Group B: micro-sanded with calcium phosphate powders and acid-etched...
August 2017: European Review for Medical and Pharmacological Sciences
Catalina Arroyave, Roser Tolrà, Livia Chaves, Marcelo Claro de Souza, Juan Barceló, Charlotte Poschenrieder
The mechanisms of extreme Al-resistance in Urochloa decumbens are not established. Full resistance expression requires a lag time of 72-96h and is preceded by a sensitive phase (24-48h) with Al-induced root growth inhibition. The aim here was to identify key processes of the activation phase of Al-resistance analysing both root exudates and comparative root proteome. Samples were taken after 0, 24 and 96h exposure to 0 or 200μM Al. Al-induced stimulation of citrate and oxalate efflux was limited to the sensitive phase...
September 10, 2017: Journal of Inorganic Biochemistry
Jarmo Leppäniemi, Sasha Hoshian, Kimmo Suomalainen, Toni Luoto, Ville Jokinen, Jari Koskinen
The non-stick properties of thin-film coatings on dental-restorative instruments were investigated by static contact-angle measurement using dental filler resin as well as by scanning electron microscopy of the amount of sticking dental restorative material. Furthermore, using a customized dipping measurement set-up, non-stick properties were evaluated by measuring force-by-time when the instrument was pulled out of restorative material. Minor improvements in non-stick properties were obtained with commercial diamond-like carbon and commercial polytetrafluoroethylene-based coatings...
September 18, 2017: European Journal of Oral Sciences
Toshinari Koketsu, Jiwei Ma, Benjamin J Morgan, Monique Body, Christophe Legein, Walid Dachraoui, Mattia Giannini, Arnaud Demortière, Mathieu Salanne, François Dardoize, Henri Groult, Olaf J Borkiewicz, Karena W Chapman, Peter Strasser, Damien Dambournet
In contrast to monovalent lithium or sodium ions, the reversible insertion of multivalent ions such as Mg(2+) and Al(3+) into electrode materials remains an elusive goal. Here, we demonstrate a new strategy to achieve reversible Mg(2+) and Al(3+) insertion in anatase TiO2, achieved through aliovalent doping, to introduce a large number of titanium vacancies that act as intercalation sites. We present a broad range of experimental and theoretical characterizations that show a preferential insertion of multivalent ions into titanium vacancies, allowing a much greater capacity to be obtained compared to pure TiO2...
September 18, 2017: Nature Materials
Teresa Catry, Paula Figueira, Lina Carvalho, Rui Monteiro, Pedro Coelho, Pedro Miguel Lourenço, Paulo Catry, Quintino Tchantchalam, Inês Catry, Maria J Botelho, Eduarda Pereira, José Pedro Granadeiro, Carlos Vale
Shellfish harvesting in intertidal areas is a widespread and economically important activity in many countries across West Africa. However, in some areas, there is virtually no information concerning the levels of contaminants (and other elements related to nutritional aspects) in the harvested species. We collected sediments and several individuals of the West African bloody cockle Senilia senilis and of the razor clam Tagelus adansoni during the dry season of 2015 nearby three islands in the Bijagós archipelago, Guinea-Bissau...
September 16, 2017: Environmental Science and Pollution Research International
Surendra Kumar Makineni, Sandeep Sugathan, Subhashish Meher, Rajarshi Banerjee, Saswata Bhattacharya, Subodh Kumar, Kamanio Chattopadhyay
Strengthening by precipitation of second phase is the guiding principle for the development of a host of high strength structural alloys, in particular, aluminium alloys for transportation sector. Higher efficiency and lower emission demands use of alloys at higher operating temperatures (200 °C-250 °C) and stresses, especially in applications for engine parts. Unfortunately, most of the precipitation hardened aluminium alloys that are currently available can withstand maximum temperatures ranging from 150-200 °C...
September 11, 2017: Scientific Reports
J Roszak, K Domeradzka-Gajda, A Smok-Pieniążek, A Kozajda, S Spryszyńska, J Grobelny, E Tomaszewska, K Ranoszek-Soliwoda, M Cieślak, D Puchowicz, M Stępnik
In the present study genotoxic effects after combined exposure of human breast cell lines (MCF-10A, MCF-7 and MDB-MB-231) to silver nanoparticles (AgNP, citrate stabilized, 15 and 45nm by STEM, Ag15 and Ag45, respectively) with aluminium chloride, butylparaben, or di-n-butylphthalate were studied. In MCF-10A cells exposed for 24h to Ag15 at the concentration of 23.5μg/mL a statistically significant increase in DNA damage in comet assay (SSB) was observed. In the presence of the test chemicals the genotoxic effect was decreased to a level comparable to control values...
September 8, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
Monika Cahova, Miriam Bratova, Petr Wohl
Parenteral nutrition (PN) provides life-saving nutritional support in situations where caloric supply via the enteral route cannot cover the necessary needs of the organism. However, it does have serious adverse effects, including parenteral nutrition-associated liver disease (PNALD). The development of liver injury associated with PN is multifactorial, including non-specific intestine inflammation, compromised intestinal permeability, and barrier function associated with increased bacterial translocation, primary and secondary cholangitis, cholelithiasis, short bowel syndrome, disturbance of hepatobiliary circulation, lack of enteral nutrition, shortage of some nutrients (proteins, essential fatty acids, choline, glycine, taurine, carnitine, etc...
September 7, 2017: Nutrients
Xiao-Lei Huo, Hui Yang, Wei Zhao, Jing-Juan Xu, Hong-Yuan Chen
In this study, we proposed a nanopore-based electrochemiluminescence (ECL) sensor combined with duplex-specific nuclease (DSN)-assisted target recycling amplification to detect microRNAs. Because of the synergetic effect of electrostatic repulsion and volume exclusion of gold nanoparticle-labeled DNA capture (DNA-Au NPs) to the negatively charged luminol anion probe, the DNA-Au NP-modified anodized aluminum oxide (AAO) nanopore electrode exhibited high ECL decline in comparison with the bare AAO electrode. Upon the introduction of DSN and target microRNA, the specific DNA-RNA binding and enzyme cleaving could trigger the detachment of capture DNA from the membrane surface, resulting in uncapping of AAO and an increased ECL signal...
September 14, 2017: ACS Applied Materials & Interfaces
Abdel B Chakiri, Philip Hodge
Friedel-Crafts reactions of isopropyl-substituted benzenes with phthalic anhydride in the presence of aluminium trichloride, followed by cyclization of the products with strong sulfuric acid give, as expected, anthraquinones. The syntheses, however, often afford more than one anthraquinone. In some cases the isopropyl groups migrate cleanly to other ring positions; in other cases they are lost.
August 2017: Royal Society Open Science
Cornelia Eisenach, Ulrike Baetz, Nicola V Huck, Jingbo Zhang, Alexis De Angeli, Gerold Beckers, Enrico Martinoia
Stomatal pores are formed between a pair of guard cells, and allow plant uptake of CO2 and water evaporation. Their aperture depends on changes in osmolyte concentration of guard cell vacuoles, specifically of K+ and Mal2-. Efflux of Mal2- from the vacuole is required for stomatal closure; however, it is not clear how the anion is released. Here we report the identification of ALMT4 (ALUMINIUM ACTIVATED MALATE TRANSPORTER 4) as an Arabidopsis thaliana ion channel that can mediate Mal2- release from the vacuole and is required for stomatal closure in response to abscisic acid (ABA)...
September 5, 2017: Plant Cell
Jin Takahashi, Takashi Shiga, Hiraku Funakoshi
BACKGROUND: Coins are made of metal, which is generally radiopaque, and so physicians often have the misconception that all coins are detectable by radiography. Here, we report a case of intentionally swallowed coins in the oesophagus of an adult; the coins could not be detected on chest radiography but were detected using computed tomography (CT). CASE PRESENTATION: A 46-year-old woman with a history of depression presented to the emergency department after an intentional medication overdose and ingestion of two Japanese 1-yen coins...
September 5, 2017: International Journal of Emergency Medicine
Ebrahim Cheraghi, Alireza Golkar, Kambiz Roshanaei, Behrang Alani
Background: Reproductive toxicity is a major challenge associated with aluminum (Al) exposure. No studies have evaluated the possible effects of curcumin (CUR) on Al-induced reproductive dysfunction. Therefore, this study investigated the effects of CUR treatment on Al-induced reproductive damage. MATERIALS AND METHODS: In this experimental study, 40 male Wistar rats were allocated to the five groups (n=8) based on the treatment they received: no treatment (control), solvent [dimethyl sulfoxide (DMSO) or distilled water], CUR 10 mg/kg body weight (BW), Al chloride 10 mg/kg BW, and CUR+Al chloride (10 mg/kg BW/each alone)...
October 2017: International Journal of Fertility & Sterility
Tosin Onabanjo Somorin, Athanasios J Kolios, Alison Parker, Ewan McAdam, Leon Williams, Sean Tyrrel
Fuel blending is a widely used approach in biomass combustion, particularly for feedstocks with low calorific value and high moisture content. In on-site sanitation technologies, fuel blending is proposed as a pre-treatment requirement to reduce moisture levels and improve the physiochemical properties of raw faeces prior to drying. This study investigates the co-combustion performance of wood dust: raw human faeces blends at varying air-to-fuel ratios in a bench-scale combustor test rig. It concludes with ash composition analyses and discusses their potential application and related problems...
September 1, 2017: Fuel
Muhammad Sani Usman, Mohd Zobir Hussein, Sharida Fakurazi, Mas Jaffri Masarudin, Fathinul Fikri Ahmad Saad
We have developed gadolinium-based theranostic nanoparticles for co-delivery of drug and magnetic resonance imaging (MRI) contrast agent using Zn/Al-layered double hydroxide as the nanocarrier platform, a naturally occurring phenolic compound, gallic acid (GA) as therapeutic agent, and Gd(NO₃)₃ as diagnostic agent. Gold nanoparticles (AuNPs) were grown on the system to support the contrast for MRI imaging. The nanoparticles were characterized using techniques such as Hi-TEM, XRD, ICP-ES. Kinetic release study of the GA from the nanoparticles showed about 70% of GA was released over a period of 72 h...
August 31, 2017: Nanomaterials
Ann-Kristin Steiner, Konstantin Y Amsharov
The intramolecular aryl-aryl coupling represents the key transformation in the rational synthesis of nanographenes and nanoribbons. In this respect the C-F bond activation was proved to be a versatile alternative enabling the synthesis of several unique carbon-based nanostructures. Here we describe an unprecedentedly challenging transformation showing that the C-F bond activation by aluminium oxide allows to perform highly effective domino-like C-C bond formation. Despite the flexible nature of oligophenylene-based precursors efficient regioselective zipping to the target nanostructures was achieved...
August 31, 2017: Angewandte Chemie
Tao Yang, Yi-Han Zhou, Sheng-Zhen Zhu, Hui Pan, Yao-Bing Huang
A simple and efficient biphasic system with earth-abundant metal salt catalyst was reported to produce furfural from xylan with a high yield up to 87.8% under microwave condition. Strikingly, the metal salt Al2(SO4)3 exhibited excellent catalytic activity for xylan conversion due to its appropriate combination of Lewis and Brønsted acidity, and as well as a good phase separation promoter. The critical role of SO42- anion was firstly emphasized, which determined the aforementioned characteristic when combining with Al3+ cation...
August 30, 2017: ChemSusChem
Shricharith Shetty, Sathish Pai
No abstract text is available yet for this article.
April 2017: Journal of Cutaneous and Aesthetic Surgery
Ashwini Annabathula, C Shanmuga Sekar, C R Srinivas
BACKGROUND: Keloids are abnormal wound responses characterised by excessive deposition of collagen and glycoprotein. They are both aesthetically and symptomatically distressing for most of the patients. There are reports of keloid management with pulsed dye laser (PDL), fractional carbon dioxide (CO2) laser and neodymium-doped yttrium aluminium garnet (Nd:YAG) laser individually and also in combination of CO2 with PDL and CO2 with Nd:YAG. Here, we discuss a combination of all the 3 lasers as a therapy for keloids...
April 2017: Journal of Cutaneous and Aesthetic Surgery
G Wang, Q Wang, M A Easton, M S Dargusch, M Qian, D G Eskin, D H StJohn
The present study investigates the influence of ultrasonic treatment on the grain refinement of commercial purity aluminium with a range of Al3Ti1B master alloy additions. When the aluminium contains the smallest amount of added master alloy, ultrasonics caused significant additional grain refinement compared to that provided by the master alloy alone. However, the influence of ultrasonics on grain size reduces with increasing addition of the master alloy which adds additional TiB2 particles and Ti solute with each incremental addition...
August 29, 2017: Scientific Reports
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