Showing 1-30 of 133 results for "647772"
Cells under pressure.
Allison Doerr
Nature methods, 10(9), 818-819 (2013-10-22)
Alexandra E Porter
Micron (Oxford, England : 1993), 37(8), 681-688 (2006-04-25)
Silicon plays an important role in bone mineralization and formation and is therefore incorporated into a wide variety of medical implants and bone grafts used today. The significance of silicon (Si) can be understood through an analysis of the mechanisms...
R K Sahoo et al.
Journal of nanoscience and nanotechnology, 14(6), 4595-4601 (2014-04-18)
The dewetting of a low melting point metal thin film deposited on silicon substrates was studied. The experimental results suggest that the change in the growth temperature affects the nanostructures that form. Based on the experimental results, the temperature which...
Mutlu Ozcan et al.
The journal of adhesive dentistry, 15(3), 211-214 (2013-05-24)
To evaluate the effect of nozzle distance, nozzle angle, and deposition duration on the silica content attained on zirconia by air abrasion. Disk-shaped zirconia (LAVA, 3M ESPE) (diameter: 10 mm, thickness: 2 mm) specimens (N = 54) were obtained. They...
Keith R Martin
Metal ions in life sciences, 13, 451-473 (2014-01-29)
Silicon is the second most abundant element in nature behind oxygen. As a metalloid, silicon has been used in many industrial applications including use as an additive in the food and beverage industry. As a result, humans come into contact...
Guo-Jun Zhang et al.
Analytica chimica acta, 749, 1-15 (2012-10-06)
Over the past decade, silicon nanowire (SiNW) biosensors have been studied for the detection of biological molecules as highly sensitive, label-free, and electrical tools. Herein we present a comprehensive review about the fabrication of SiNW biosensors and their applications in...
M Naoi et al.
Mechanisms of ageing and development, 111(2-3), 175-188 (2000-02-03)
Dopamine neurons in the substantia nigra of human brain are selectively vulnerable and the number decline by aging at 5-10% per decade. Enzymatic and non-enzymatic oxidation of dopamine generates reactive oxygen species, which induces apoptotic cell death in dopamine neurons....
P A LeWitt et al.
Neurology, 42(11), 2111-2117 (1992-11-01)
We used two analytic methods (a multichannel coulometric electrode array with high-performance liquid chromatography, and gas chromatography-mass spectrophotometry) to measure CSF dopamine (DA) and its metabolites in mildly affected, unmedicated subjects with Parkinson's disease (PD). The mean (+/- SD) concentration...
Guohou Miao et al.
Materials science & engineering. C, Materials for biological applications, 33(7), 4236-4243 (2013-08-06)
Acid-catalyzed mesoporous bioactive glass microspheres (MBGMs-A) and acid-alkali co-catalyzed mesoporous bioactive glass microspheres (MBGMs-B) were successfully synthesized via combination of sol-gel and water-in-oil (W/O) micro-emulsion methods. The structural, morphological and textural properties of mesoporous bioactive glass microspheres (MBGMs) were characterized...
Xuyang Liu et al.
Environmental pollution (Barking, Essex : 1987), 184, 570-578 (2013-11-05)
Surface transformation can affect the stability, reactivity, and toxicity of titanium dioxide (TiO2) nanoparticles (NPs) in water environments. Herein, we investigated the release kinetics of Si impurity frequently introduced during NP synthesis and the resulting effect on TiO2 NP transformation...
Y Miura
The Kurume medical journal, 47(4), 267-272 (2001-02-24)
Plasma beta-phenylethylamine (PEA) levels were determined in 27 patients with Parkinson's disease (PD) in order to evaluate its relation with the severity or clinical course of PD. The plasma PEA concentrations in PD patients were significantly lower (mean +/- SD...
V N Marty et al.
Radiation research, 182(6), 653-665 (2014-11-18)
The evaluation of potential health risks associated with neuronal exposure to space radiation is critical for future long duration space travel. The purpose of this study was to evaluate and compare the effects of low-dose proton and high-energy charged particle...
Norbert W Lutz et al.
PloS one, 2(7), e595-e595 (2007-07-06)
Multiple sclerosis (MS), an inflammatory disease of the central nervous system, manifests itself in numerous forms and stages. A number of brain metabolic alterations have been reported for MS patients vs. control subjects. However, metabolite profiles of cerebrospinal fluid (CSF)...
Emil Rudobeck et al.
Radiation research, 181(4), 407-415 (2014-03-15)
An unavoidable complication of space travel is exposure to radiation consisting of high-energy charged particles (HZE), such as Fe and Si nuclei. HZE radiation can affect neuronal functions at the level of the synapse or neuronal soma without inducing significant...
Dae-Hee Kim et al.
Journal of nanoscience and nanotechnology, 13(5), 3564-3567 (2013-07-19)
The initial reaction of dimethylaluminum isopropoxide (Al(CH3)2OC3H7, DMAI) with a fully hydrogen-terminated Si (001) surface for aluminum oxide thin-film growth was investigated using density functional theory. Al-C and Al-O bonds of the adsorbed DMAI were easily broken to produce unimethylaluminum...
Graham A Showell et al.
Drug discovery today, 8(12), 551-556 (2003-06-25)
During the lead optimization phase of drug discovery projects, the factors contributing to subsequent failure might include poor portfolio decision-making and a sub-optimal intellectual property (IP) position. The pharmaceutical industry has an ongoing need for new, safe medicines with a...
Muhammad Ahsan Farooq et al.
Ecotoxicology and environmental safety, 96, 242-249 (2013-08-06)
Biotic systems face immense environmental hazards such as accumulation of heavy metals, particularly in agricultural ecosystems that might cause deterioration of yield and quality of crops. In this study, we evaluated the role of silicon (Si) in alleviating the heavy...
Karyn L Jarvis et al.
Advances in colloid and interface science, 175, 25-38 (2012-04-24)
Porous silicon (pSi) has a number of unique properties that appoint it as a potential drug delivery vehicle; high loading capacity, controllable surface chemistry and structure, and controlled release properties. The native Si(y)SiH(x) terminated pSi surface is highly reactive and...
Bo-Soon Kim et al.
Journal of nanoscience and nanotechnology, 13(5), 3622-3626 (2013-07-19)
A subwavelength structure (SWS) was formed via a simple chemical wet etching using a gold (Au) catalyst. Single nano-sized Au particles were fabricated by metallic self-aggregation. The deposition and thermal annealing of the thin metallic film were carried out. Thermal...
C E Shaw et al.
Journal of neurology, 242(2), 53-58 (1995-01-01)
Magnetic resonance imaging of multiple sclerosis (MS) patients often shows active inflammatory lesions despite clinical remission. No immunological marker of disease activity has been identified in these patients. Concentrations of neopterin, interleukin-2 (IL-2), soluble interleukin-2 receptor (sIL-2R) and tumour necrosis...
Dennis Sebastian et al.
Journal of AOAC International, 96(2), 251-259 (2013-06-19)
A 5-day method for determining the soluble silicon (Si) concentrations in nonliquid fertilizer products was developed using a sodium carbonate (Na2CO3)-ammonium nitrate (NH4NO3) extractant followed by visible spectroscopy with heteropoly blue analysis at 660 nm. The 5-Day Na2CO3-NH4NO3 Soluble Si...
Nathan Marchack et al.
Annual review of chemical and biomolecular engineering, 3, 235-262 (2012-06-14)
The invention of the transistor followed by more than 60 years of aggressive device scaling and process integration has enabled the global information web and subsequently transformed how people communicate and interact. The principles and practices built upon chemical processing...
Matthias Glaser et al.
Journal of nuclear medicine : official publication, Society of Nuclear Medicine, 54(11), 1981-1988 (2013-10-12)
Human epidermal growth factor receptor (HER2)-targeted Affibody molecules radiolabeled with (18)F allow the noninvasive assessment of HER2 status in vivo through PET imaging. Such agents have the potential to improve patient management by selecting individuals for HER2-targeted therapies and allowing...
Jeong Min Lee et al.
Journal of nanoscience and nanotechnology, 13(11), 7741-7744 (2013-11-20)
This study demonstrated meso/micro/nano-ultraprecision machining through electrochemical reactions using intermittent DC pulses. The experiment focused on two machining methods: (1) pulse electrochemical polishing (PECP) of stainless steel, and (2) pulse electrochemical nano-patterning (PECNP) on a silicon (Si) surface, using atomic...
E O Uthus et al.
The Journal of nutrition, 126(9 Suppl), 2452S-2459S (1996-09-01)
Circumstantial evidence suggests that aluminum, arsenic, bromine, cadmium, germanium, lead, lithium, nickel, rubidium, silicon, tin and vanadium are essential. The evidence is most compelling for arsenic, nickel, silicon and vanadium. The estimated daily dietary intakes for these elements are arsenic...
S Engelborghs et al.
Neurochemical research, 28(8), 1145-1150 (2003-07-02)
To study changes in amino acid metabolism and biogenic amines in Parkinson's disease, we set up a prospective study and measured biogenic amines, their main metabolites, and 22 different amino acids, in cerebrospinal fluid of Parkinson's disease patients (n =...
E Epstein
Proceedings of the National Academy of Sciences of the United States of America, 91(1), 11-17 (1994-01-04)
Silicon is the second most abundant element in soils, the mineral substrate for most of the world's plant life. The soil water, or the "soil solution," contains silicon, mainly as silicic acid, H4SiO4, at 0.1-0.6 mM--concentrations on the order of...
Giovanni Forte et al.
Annali dell'Istituto superiore di sanita, 41(2), 213-216 (2005-10-26)
Although some studies suggested a link between exposure to trace elements and development of multiple sclerosis (MS), clear information on their role in the aetiology of MS is still lacking. In this study the concentrations of Al, Ba, Be, Bi...
A N Fonteh et al.
Amino acids, 32(2), 213-224 (2006-10-13)
Our aim was to determine changes in free amino acid (FAA) and dipeptide (DP) concentrations in probable Alzheimer's disease (pAD) subjects compared with control (CT) subjects using liquid chromatography and electrospray ionization tandem mass spectrometry (LCMS2). We recruited gender- and...
Priyatha Premnath et al.
Journal of biomedical nanotechnology, 10(6), 1061-1067 (2014-04-23)
Hybrid biomaterials are a combination of two or more different materials that work synergistically to produce superior properties. Nano structuring of such hybrid materials has also posed complications. In this study, we present, for the first time a nanofibrous hybrid...

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