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Martina Lorenzetti Eva Pellicer Jordi Sort Maria Dolors Baró Janez Kova? Sa?a Novak Spomenka Kobe 《Materials》2014,7(1):180-194
The electrochemical behavior of polycrystalline TiO2 anatase coatings prepared by a one-step hydrothermal synthesis on commercially pure (CP) Ti grade 2 and a Ti13Nb13Zr alloy for bone implants was investigated in Hank’s solution at 37.5 °C. The aim was to verify to what extent the in-situ-grown anatase improved the behavior of the substrate in comparison to the bare substrates. Tafel-plot extrapolations from the potentiodynamic curves revealed a substantial improvement in the corrosion potentials for the anatase coatings. Moreover, the coatings grown on titanium also exhibited lower corrosion-current densities, indicating a longer survival of the implant. The results were explained by considering the effects of crystal morphology, coating thickness and porosity. Evidence for the existing porosity was obtained from corrosion and nano-indentation tests. The overall results indicated that the hydrothermally prepared anatase coatings, with the appropriate morphology and surface properties, have attractive prospects for use in medical devices, since better corrosion protection of the implant can be expected. 相似文献
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Attention-deficit/hyperactivity disorder (ADHD) is a common neurodevelopmental disorder with impairments across the lifespan. The persistence of ADHD is associated with considerable liability to neuropsychiatric co-morbidity such as depression, anxiety and substance use disorder. The substantial heritability of ADHD is well documented and recent genome-wide analyses for risk genes revealed synaptic adhesion molecules (e.g. latrophilin-3, LPHN3; fibronectin leucine-rich repeat transmembrane protein-3, FLRT3), glutamate receptors (e.g. metabotropic glutamate receptor-5, GRM5) and mediators of intracellular signalling pathways (e.g. nitric oxide synthase-1, NOS1). These genes encode principal components of the molecular machinery that connects pre- and postsynaptic neurons, facilitates glutamatergic transmission, controls synaptic plasticity and empowers intersecting neural circuits to process and refine information. Thus, identification of genetic variation affecting molecules essential for the formation, specification and function of excitatory synapses is refocusing research efforts on ADHD pathogenesis to include the long-neglected glutamate system. 相似文献
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Elizabeth A. Richards Julie Cowan Novak Lynn V. Davis 《Journal of community health nursing》2013,30(3):114-120
Team Reach Out Biloxi is a nursing student-initiated service-learning project with the goal of providing ongoing assistance to the victims of Hurricane Katrina. On 6 different occasions from 2005 to 2008, Purdue nursing students integrated their leadership skills with application of public health knowledge, compassion, and concern as they worked in partnership with the Gulfport region Coastal Family Health Clinics (CFHC). This article reviews the service-learning framework, course planning, and implementation of a 3-year posthurricane disaster project. 相似文献
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Camila Fernanda Novak Pinheiro de Freitas Fabiane Mulinari-Brenner Hanae Rafaela Fontana Arthur Conelian Gentili Mariana Hammerschmidt 《Anais brasileiros de dermatologia》2013,88(4):627-630
Ichthyoses are a common group of keratinization disorders. A non-inflammatory
generalized persistent skin desquamation is observed. It is characterized by
increased cell turnover, thickening of the stratum corneum and functional changes of
sebaceous and sweat glands. All of these favor fungal proliferation. Dermatophytes
may infect skin, hair and nails causing ringworm or tinea. They have the ability to
obtain nutrients from keratinized material. One of its most prevalent genera is
Trichophyton rubrum. Although tineas and ichthyoses are quite common, the association
of the two entities is rarely reported in the literature. Three cases of ichthyosis
associated with widespread infection by T. rubrum are presented. Resistance to
several antifungal treatments was responsible for worsening of ichthyosis signs and
symptoms. 相似文献
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