Showing 1-30 of 153 resultados for "

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Andrei C Miu et al.
Journal of Alzheimer's disease : JAD, 10(2-3), 179-201 (2006-11-23)
Despite the circumstantial and sometimes equivocal support, the hypothetic involvement of aluminum (Al) in the etiology and pathogenesis of Alzheimer's disease (AD) has subsisted in neuroscience. There are very few other examples of scientific hypotheses on the pathogenesis of a...
Seong-Hee Lee et al.
Journal of nanoscience and nanotechnology, 13(1), 509-512 (2013-05-08)
An ultrafine grain (UFG) complex lamella aluminum alloy sheet was successfully fabricated by ARB process using AA1050 and AA6061. The lamella thickness of the alloy became thinner and elongated to the rolling direction with increasing the number of ARB cycles....
S T Wang et al.
Journal of analytical toxicology, 15(2), 66-70 (1991-03-01)
A simple dilution procedure for the determination of aluminum in human serum and urine is described. Serum and urine specimens were analyzed directly after dilution with 0.1% Triton X-100. The matrix-based calibration was used for quantitation with the use of...
R Shukla et al.
The International journal of neuroscience, 116(12), 1391-1402 (2006-12-06)
Evidence from clinical and experimental studies supports the hypothesis of free radical-mediated damage of dopaminergic neurons in the pathology of Parkin's disease (PD). The present study was undertaken to evaluate the role of nitric oxide and oxidative stress in PD....
Huyi He et al.
Plant signaling & behavior, 7(4), 469-471 (2012-04-14)
Nitric oxide (NO) is involved, together with plant hormones, in the adaptation to Al stress in plants. However, the mechanism by which NO and plant hormones interplay to improve Al tolerance are still unclear. We have recently shown that patterns...
Kate M Brougham et al.
Environmental pollution (Barking, Essex : 1987), 178, 89-96 (2013-04-03)
Although a great deal is known about the deposition of fluoride on vegetation, and the hazards associated with uptake by grazing herbivores, little is known about what happens to the concentration of fluoride in vegetation and soil at polluted sites...
Sungwon Han et al.
Cell biology and toxicology, 29(2), 75-84 (2013-03-07)
Metal pollutants are a global health risk due to their ability to contribute to a variety of diseases. Aluminum (Al), a ubiquitous environmental contaminant is implicated in anemia, osteomalacia, hepatic disorder, and neurological disorder. In this review, we outline how...
Vesa Riihimäki et al.
Critical reviews in toxicology, 42(10), 827-853 (2012-09-28)
Exposure to aluminum at work is widespread, and people are exposed to several species of aluminum, which differ markedly as to the kinetics and toxicity. Especially welding of aluminum is widely applied and continuously expanding. Inhalation of fine particles of...
A El-Yazigi et al.
Clinical chemistry, 30(8), 1358-1360 (1984-08-01)
We measured the concentrations of nine trace elements in cerebrospinal fluid of 11 patients with malignant brain tumors, 11 with benign brain tumors, and 10 control patients, using flameless atomic absorption spectrophotometry. The mean and standard deviation for these concentrations...
Daeryong Park et al.
Environmental monitoring and assessment, 187(1), 4095-4095 (2014-11-17)
Eighteen sites impacted by abandoned mine drainage (AMD) in Pennsylvania were sampled and measured for pH, acidity, alkalinity, metal ions, and sulfate. This study compared the accuracy of four acidity calculation methods with measured hot peroxide acidity and identified the...
Daniel P Perl et al.
Journal of Alzheimer's disease : JAD, 9(3 Suppl), 291-300 (2006-09-29)
It is now 25 years since the publication of our original paper investigating the association aluminum with Alzheimer's disease. This publication reported on the results of scanning electron microscopy coupled x-ray spectrometry microprobe elemental studies of both neurofibrillary tangle-bearing and...
Brigitta Tóth et al.
Acta biologica Hungarica, 64(1), 60-70 (2013-04-10)
Biofertilizers are used to improve soil fertility and plant production in sustainable agriculture. However, their applicability depends on several environmental parameters. The aim of our study was to evaluate the effect of free-living bacteria containing fertilizer on the growth of...
Zhiguo Pei et al.
Environmental pollution (Barking, Essex : 1987), 184, 579-585 (2013-11-10)
Effects of copper (Cu) and aluminum (Al) on the adsorption of sulfathiazole (STZ) and tylosin (T) to peat and soil were investigated using a batch equilibration method. Results show that Cu suppressed STZ adsorption onto peat and soil at pH < 5.0...
Wen Zhang et al.
The Analyst, 129(3), 229-234 (2004-02-24)
The fabrication and application of a novel electrochemical detector (ED) with nano crystalline Ce-doped lead dioxide film chemically modified electrode (CME) for liquid chromatography (LC) were described. The Ce-doped PbO(2) film was characterized by X-ray diffractometer (XRD) and scanning tunnel...
Giovanni Muto et al.
Urology, 83(4), 851-855 (2014-02-20)
To determine whether thulium:yttrium-aluminum-garnet laser resection of bladder tumor (TmLRBT) may offer advantages over classic resection. From April 2011 to September 2012, 55 consecutive patients newly diagnosed with clinical stage ≤T2 bladder cancer were enrolled in a prospective study on TmLRBT....
H U Shetty et al.
Clinical chemistry, 42(2), 298-302 (1996-02-01)
Previous studies suggest the presence of increased concentrations of cerebral myo-inositol in Alzheimer disease (AD). To characterize this abnormality further, we quantified myo-inositol and several other polyols in cerebrospinal fluid (CSF) and plasma from 10 AD subjects and 10 healthy...
D A Loeffler et al.
Journal of neural transmission. Parkinson's disease and dementia section, 9(1), 45-53 (1995-01-01)
Though depletion of CSF homovanillic acid (HVA) concentration has often been regarded as a direct indicator of dopamine (DA) deficiency in Parkinson's Disease (PD), CSF HVA is normal in mildly affected patients. To explore why, we measured DA and its...
Hongbo Lou et al.
Proceedings of the National Academy of Sciences of the United States of America, 110(25), 10068-10072 (2013-06-05)
When a material is heated, generally, it dilates. Here, we find a general trend that the average distance between a center atom and atoms in the first nearest-neighbor shell contracts for several metallic melts upon heating. Using synchrotron X-ray diffraction...
Aifeng Liu et al.
Journal of nanoscience and nanotechnology, 14(6), 4584-4589 (2014-04-18)
Ordered hexagonal mesoporous aluminosilicates with lower Si/Al ratio below 5 have been successfully synthesized via the co-assembly of preformed aluminosilicate precursors with Gemini surfactant [C12H25N+(CH3)2(CH2)6N+(CH3)2C12H25] x 2Br(-) as the template. Powder X-ray diffraction, transmission electron microscopy, scanning electron microscopy, N2...
Lin Ma et al.
Ultrasonics, 54(3), 929-937 (2013-12-04)
The vibration characteristics of an aluminum surface subjected to ultrasonic waves were investigated with a combination of numerical simulation and experimental testing. The wetting behavior of solder droplets on the vibrating aluminum surface was also examined. The results show that...
Arjun K Pathak et al.
Physical review letters, 110(18), 186405-186405 (2013-05-21)
Unique from other rare earth dialuminides, PrAl(2) undergoes a cubic to tetragonal distortion below T = 30 K in a zero magnetic field, but the system recovers its cubic symmetry upon the application of an external magnetic field of 10...
M A Raskind et al.
Biological psychiatry, 46(6), 756-765 (1999-09-24)
High cerebrospinal fluid (CSF) norepinephrine (NE) concentrations in aging and Alzheimer's disease (AD) could reflect decreased NE clearance from central nervous system (CNS) extracellular fluid or increased release of NE into CNS extracellular fluid. Measuring CSF concentrations of the intraneuronal...
M O Kristensen et al.
Acta neurologica Scandinavica, 87(6), 475-481 (1993-06-01)
The cobalamin status was evaluated in Alzheimer dementia (n = 26), other dementias (n = 24), various gerontopsychiatric disorders (n = 25), and in neuro-psychiatrically healthy controls (n = 20). Supplementing serum cobalamin we measured methylmalonic acid (MMA), a metabolite...
Jian-Yong Li et al.
Proceedings of the National Academy of Sciences of the United States of America, 111(17), 6503-6508 (2014-04-15)
Aluminum (Al) toxicity is a major constraint for crop production on acid soils which compose ∼ 40% of arable land in the tropics and subtropics. Rice is the most Al-tolerant cereal crop and offers a good model for identifying Al...
Antoine Allanore et al.
Nature, 497(7449), 353-356 (2013-05-10)
Molten oxide electrolysis (MOE) is an electrometallurgical technique that enables the direct production of metal in the liquid state from oxide feedstock, and compared with traditional methods of extractive metallurgy offers both a substantial simplification of the process and a...
Deep Raj Sharma et al.
Toxicology and applied pharmacology, 273(2), 365-380 (2013-10-03)
The present investigation was carried out to elucidate a possible molecular mechanism related to the effects of aluminium-induced oxidative stress on various mitochondrial respiratory complex subunits with special emphasis on the role of Peroxisome proliferator activated receptor gamma co-activator 1α...
The formation of 3-hydroxy-4-methoxyphenylalanine and 3-hydroxy-4-methoxyphenethylamine in plasma during L-DOPA therapy in patients with Parkinson's disease.
T Ishimitsu et al.
Chemical & pharmaceutical bulletin, 32(8), 3320-3322 (1984-08-01)
Y Z Zhu et al.
Environmental toxicology and pharmacology, 35(1), 82-87 (2013-01-01)
Aluminum (Al) is widely used in daily life and will lead to environmental release and exposure. The toxicity of Al had been documented, and which attracted a growing concern on human and animal health. The immune system appears to be...
Valerio Leoni et al.
Journal of lipid research, 46(2), 191-195 (2004-12-04)
In a recent publication [Diestel, A., O. Aktas, D. Hackel, I. Hake, S. Meier, C. S. Raine, R. Nitsch, F. Zipp, and O. Ullrich. 2003. Activation of microglial poly (ADP-ribose)-polymerase-1 by cholesterol breakdown products during neuroinflammation: a link between demyelination...
Surendra K Pradhan et al.
Journal of water and health, 11(4), 581-589 (2013-12-18)
Wastewater is an important source of pathogenic enteric microorganisms in surface water and a major contaminating agent of drinking water. Although primary and secondary wastewater treatments reduce the numbers of microorganisms in wastewater, significant numbers of microbes can still be...