Showing 1-30 of 153 resultados for "

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[Conductive composite nanomaterial with biocompatible matrix and multilayer carbon nanotubes].
L P Ichkitidze et al.
Meditsinskaia tekhnika, (2)(2), 11-15 (2013-06-26)
S R Mousavi et al.
The international journal of occupational and environmental medicine, 4(2), 80-86 (2013-04-10)
Contamination of water by toxic chemicals has become commonly recognized as an environmental concern. Based on our clinical observation in Mashhad, northeastern Iran, many people might be at risk of exposure to high concentrations of toxic heavy metals in water....
Julian I Schroeder et al.
Nature, 497(7447), 60-66 (2013-05-03)
With the global population predicted to grow by at least 25 per cent by 2050, the need for sustainable production of nutritious foods is critical for human and environmental health. Recent advances show that specialized plant membrane transporters can be...
Hideaki Matsumoto et al.
Plant science : an international journal of experimental plant biology, 185-186, 1-8 (2012-02-14)
Al inhibits root apex elongation with concomitant morphological injuries such as ruptures punctuated by the regions stained with Evans blue. The recovery can be investigated by transfer of Al-injured roots to a solution lacking Al. In the Al-injured root apex...
G Toncev et al.
European journal of neurology, 9(3), 221-226 (2002-05-03)
Several findings suggest lower levels of serum uric acid in multiple sclerosis (MS) patients. The aim of this study is to investigate relationships of uric acid serum levels in relapse-remitting (RR) MS patients with clinical activity of disease and blood-brain...
Arezoo Campbell
Journal of Alzheimer's disease : JAD, 10(2-3), 165-172 (2006-11-23)
Metals such as aluminum (Al), copper (Cu), zinc and iron have been implicated in the pathogenesis of Alzheimer's disease (AD). Because trace amounts of metals are present in the drinking water, there is a possibility for low-dose chronic exposure. Since...
A V Dmitriev et al.
Ultrasonics, 54(3), 905-913 (2013-12-04)
The natural frequencies and distributions of displacement components for the surface vibrational modes in thin isotropic elastic disks are calculated. In particular, the research is focused on even solutions for low-lying resonant vibrations with large angular wave numbers. Several families...
Jose L Domingo
Journal of Alzheimer's disease : JAD, 10(2-3), 331-341 (2006-11-23)
Alzheimer's disease (AD) is characterized by the presence of neuritic plaques and neurofibrillary tangles in the brain. Although the causes of AD remain still unknown, it seems that certain environmental factors may be involved in the etiology and pathogenesis of...
Wilson R Molina et al.
Urology, 83(4), 738-744 (2014-02-04)
To evaluate the association of preoperative noncontrast computed tomography stone characteristics, laser settings, and stone composition with cumulative holmium:yttrium-aluminum-garnet (Ho:YAG) laser time/energy. We retrospectively reviewed patients who underwent semirigid/flexible ureteroscopy and Ho:YAG laser lithotripsy (200 or 365 μm laser fiber;...
Billie Gould et al.
Molecular ecology, 23(24), 6058-6072 (2014-08-26)
Studies of the wild grass Anthoxanthum odoratum at the long-term Park Grass Experiment (PGE, Harpenden, UK) document a well-known example of rapid plant evolution in response to environmental change. Repeated fertilizer applications have acidified the soil in some experimental plots...
A S Waters et al.
Water science and technology : a journal of the International Association on Water Pollution Research, 67(8), 1764-1772 (2013-04-13)
Acid mine drainage (AMD) has degraded water quality and ecology in streams on the Stockton Plateau, the site of New Zealand's largest open-cast coal mining operation. This has previously been attributed largely to the effects of acidity and elevated aluminium...
J R Walton
Journal of Alzheimer's disease : JAD, 35(1), 7-43 (2013-02-06)
The neuroanatomic specificity with which Alzheimer's disease (AD) progresses could provide clues to AD etiopathology. Magnetic resonance imaging studies of AD clinical progression have confirmed general conclusions from earlier studies of AD neuropathological progression wherein neurofibrillary tangle pathology was observed...
A K Susheela et al.
The international journal of occupational and environmental medicine, 4(2), 61-72 (2013-04-10)
Fluoride is used increasingly in a variety of industries in India. Emission of fluoride dust and fumes from the smelters of primary aluminum producing industries is dissipated in the work environment and poses occupational health hazards. To study the prevalence...
Jonghwan Lee et al.
Journal of nanoscience and nanotechnology, 13(11), 7551-7555 (2013-11-20)
In this paper, we present a detailed study on the local back contact (LBC) formation of rear-surface-passivated silicon solar cells, where both the LBC opening and metallization are realized by one-step alloying of a dot of fine pattern screen-printed aluminum...
John Savory et al.
Journal of Alzheimer's disease : JAD, 10(2-3), 135-144 (2006-11-23)
For four decades the controversial question concerning a possible role for aluminum neurotoxicity in contributing to the pathogenesis of Alzheimer's disease has been debated, and studies by different investigators have yielded contradictory results. The lack of sensitivity to aluminum neurotoxicity...
Jae Chun Lee et al.
Journal of nanoscience and nanotechnology, 13(11), 7561-7567 (2013-11-20)
Thin ZrO2/Al2O3 films that consisted of alternating monoclinic ZrO2 nanolayers and amorphous Al2O3 nanolayers were deposited on a tool steel substrate using Zr and Al cathodes in a cathodic arc plasma deposition system, and then oxidized at 600-900 degrees C...
Gordon L Klein
Current opinion in pharmacology, 5(6), 637-640 (2005-10-04)
The aluminum problem is now over 25 years old, but has remained a neglected concern. Data indicate that aluminum contaminates much of the raw material used to manufacture solutions used for intravenous nutritional support of hospitalized and ambulatory patients, and...
Arjun Joshua et al.
Proceedings of the National Academy of Sciences of the United States of America, 110(24), 9633-9638 (2013-05-28)
Controlling the coupling between localized spins and itinerant electrons can lead to exotic magnetic states. A novel system featuring local magnetic moments and extended 2D electrons is the interface between LaAlO3 and SrTiO3. The magnetism of the interface, however, was...
Takashi Abe et al.
Neuroscience letters, 336(2), 105-108 (2002-12-25)
In order to investigate the possible role of oxidative RNA damage in the pathogenesis of Parkinson's disease (PD), the concentrations of the oxidative stress marker 8-hydroxyguanosine (8-OHG) were measured in the cerebrospinal fluid (CSF) and the serum of patients with...
Huyi He et al.
Protoplasma, 249(3), 483-492 (2011-08-19)
Nitric oxide (NO) is a ubiquitous signal molecule involved in multiple plant responses to environmental stress. In the recent years, the regulating role of NO on heavy metal toxicity in plants is realized increasingly, but knowledge of NO in alleviating...
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...
More on pulmonary fibrosis associated with aluminum trihydrate (Corian) dust.
Rita McKeever et al.
The New England journal of medicine, 371(10), 973-973 (2014-09-04)
Rima Obeid et al.
Clinical chemistry, 53(6), 1129-1136 (2007-03-27)
Increased plasma total homocysteine (tHcy) is a risk factor for neurological diseases, but the underlying pathophysiology has not been adequately explained. We evaluated concentrations of tHcy, S-adenosyl homocysteine (SAH), S-adenosyl methionine (SAM), folate, and vitamin B(12) in cerebrospinal fluid (CSF)...
Jaehwan Ahn et al.
Journal of nanoscience and nanotechnology, 13(11), 7482-7486 (2013-11-20)
Electrochemical measurements using the microelectrodes are increasingly utilized for the label-free detection of the small amount of biological materials such as DNA, protein, and cells. However, the interfacial electrode impedance increases and may hinder the detection of weak signals as...
Paolo Zatta et al.
Brain research bulletin, 62(1), 15-28 (2003-11-05)
Until the last decade, little attention was given by the neuroscience community to the neurometabolism of metals. However, the neurobiology of heavy metals is now receiving growing interest, since it has been linked to major neurodegenerative diseases. In the present...
Y AlTarakemah et al.
The European journal of prosthodontics and restorative dentistry, 20(4), 184-190 (2013-03-19)
Polymerization shrinkage can result in poor denture fit. The aim of this study was to determine the accuracy of heat-polymerized acrylic bases on simulated edentulous metal ridges having simplified and standardized geometric configurations. Analysis of variance was used to explore...
Christopher Auger et al.
Biotechnology advances, 31(2), 266-273 (2012-12-04)
As our reliance on aluminum (Al) increases, so too does its presence in the environment and living systems. Although generally recognized as safe, its interactions with most living systems have been nefarious. This review presents an overview of the noxious...
A Becaria et al.
Toxicology and industrial health, 18(7), 309-320 (2004-04-08)
Although aluminum is the most abundant metal in nature, it has no known biological function. However, it is known that there is a causal role for aluminum in dialysis encephalopathy, microcytic anemia, and osteomalacia. Aluminum has also been proposed to...
Dedong Han et al.
Journal of nanoscience and nanotechnology, 13(7), 5154-5157 (2013-08-02)
We have fabricated flexible thin-film transistors (TFTs) on plastic substrates using Aluminum-doped ZnO (AZO) as an active channel layer at room temperature. The AZO-TFTs showed n-channel device characteristics and operated in enhancement mode. The device shows a threshold voltage of...
Joseph Lemire et al.
Journal of inorganic biochemistry, 105(11), 1513-1517 (2011-11-22)
Aluminum (Al) has been implicated in a variety of neurological diseases. However, the molecular mechanisms that enable Al to be involved in these disorders have yet to be fully delineated. Using astrocytes as a model of the cerebral cellular system...