Search Within
Applied Filters:
Showing 1-30 of 169 results for "


" within Papers
Chao Liu et al.
Organic letters, 15(24), 6166-6169 (2013-11-15)
A nickel-catalyzed aromatic C-H alkylation with tertiary or secondary alkyl-Br bonds for the construction of indolones was demonstrated. Various functional groups were well tolerated. Moreover, the challenging secondary alkyl bromides were well introduced in this transformation. Radical trapping and photocatalysis
Joe C Polacco et al.
Plant science : an international journal of experimental plant biology, 199-200, 79-90 (2012-12-26)
We propose experimental strategies to expand our understanding of the role of Ni in plants, beyond the Ni-metallocenter of urease, still the only identified Ni-containing plant enzyme. While Ni has been considered an essential mineral for plants there is a
Paul G Edwards et al.
Environmental monitoring and assessment, 186(1), 481-500 (2013-08-28)
The Department of Energy's Savannah River Site is a former nuclear weapon material production and current research facility located in South Carolina, USA. Wastewater discharges from a fuel and nuclear reactor target manufacturing facility released depleted and natural U, as
Jingjing Du et al.
Journal of nanoscience and nanotechnology, 13(1), 690-693 (2013-05-08)
Ni-W alloy coatings were prepared by electrodeposition technique with citric acid as a complexing agent. The influence of the main technical parameters on W content in the Ni-W alloy coatings were investigated by electron dispersive spectroscopy (EDS), and the microstructure
Maryam Ezoddin et al.
Environmental technology, 35(17-20), 2401-2409 (2014-08-26)
A microextraction method based on ultrasound-assisted surfactant-enhanced emulsification using solidification of a floating organic droplet (UASEME-SFO) was evaluated for simultaneous determination of Cd and Ni in water and tea samples followed by flame atomic absorption spectrometry. In the UASEME-SFO technique
Takashi Abe et al.
Journal of neuroscience research, 70(3), 447-450 (2002-10-23)
To investigate the possible role of oxidative RNA damage in the pathogenesis of Alzheimer's disease (AD), the concentrations of the oxidative stress marker 8-hydroxyguanosine (8-OHG) were measured in the cerebrospinal fluid (CSF) and the serum of patients with AD and
Nader Rahemi et al.
Journal of nanoscience and nanotechnology, 13(7), 4896-4908 (2013-08-02)
Ni/Al2O3 and Ni/Al2O3-CeO2 nanocatalysts have been prepared with impregnation method, treated with non-thermal plasma, characterized and tested for dry reforming of methane. For catalyst characterization, the following techniques have been used: XRD, FESEM, TEM, EDX dot mapping, BET, FTIR, TG-DTG
Kaoru Onami et al.
The Journal of investigative dermatology, 134(7), 1951-1960 (2014-02-18)
Although extracellular adenosine 5'-triphosphate (eATP) has a crucial role in the sensitization phase of contact hypersensitivity (CHS), the mechanism by which hapten causes keratinocyte cell death and ATP release is unknown. We examined the time course of cell death, reactive
Lucía Saya et al.
Organic letters, 16(19), 5008-5011 (2014-09-19)
A highly diastereo- and chemoselective intramolecular nickel-catalyzed cycloaddition of alkene- and alkyne-tethered alkynylidenecyclopropanes is reported. The method constitutes the first fully intramolecular [3 + 2 + 2] alkylidenecyclopropropane cycloaddition occurring via a proximal cleavage of the cyclopropane and makes it
Mohd Talha et al.
Materials science & engineering. C, Materials for biological applications, 33(7), 3563-3575 (2013-08-06)
The field of biomaterials has become a vital area, as these materials can enhance the quality and longevity of human life. Metallic materials are often used as biomaterials to replace structural components of the human body. Stainless steels, cobalt-chromium alloys
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)
Josep Cornella et al.
Organic letters, 15(24), 6298-6301 (2013-11-21)
A Ni-catalyzed arylation of inert C-O bonds that operates at temperatures as low as -40 °C is described. Unlike other methods for C-O bond cleavage utilizing organometallic species, this protocol operates at low temperatures, thus allowing the presence of sensitive
Palatally anchored maxillary molar mesialization using the mesialslider.
Benedict Wilmes et al.
Journal of clinical orthodontics : JCO, 47(3), 172-179 (2013-05-11)
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
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
Anna Walter et al.
Neurobiology of aging, 25(10), 1299-1303 (2004-10-07)
Experimental and clinical studies give evidence for breakdown of membrane phospholipids during neurodegeneration. In the present study, we measured the levels of glycerophosphocholine (GPCh), phosphocholine (PCh), and choline, that is, water-soluble metabolites of phosphatidylcholine (PtdCho), in human cerebrospinal fluid (CSF).
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
Gary A Molander et al.
Organic letters, 16(7), 1904-1907 (2014-03-29)
A general method for the alkenylation of alkyl electrophiles using nearly stoichiometric amounts of the air- and moisture-stable potassium organotrifluoroborates has been developed. Various functional groups were tolerated on both the nucleophilic and electrophilic partner. Reactions of highly substituted E-
Nitai Charan Giri et al.
Biochemistry, 52(24), 4168-4183 (2013-05-23)
Occupational and/or environmental exposure to nickel has been implicated in various types of cancer, and in vitro exposure to nickel compounds results in the accumulation of Ni(II) ions in cells. One group of major targets of Ni(II) ions inside the
Yang Liu et al.
Chemosphere, 112, 282-288 (2014-07-23)
Metals are always found in the environment as mixtures rather than as solitary elements. However, effect models such as biotic ligand models (BLMs) are usually derived for toxicity prediction of single metals. Our study aimed at predicting mixture toxicity of
Hu Liu et al.
Journal of chromatography. A, 1344, 59-65 (2014-04-29)
This work proposed an integrative method of protein refolding and purification by like-charged resin facilitated refolding and metal-chelate affinity adsorption. Hexahistidine-tagged enhanced green fluorescence protein (EGFP) was overexpressed in Escherichia coli as inclusion bodies (IBs), and then the protein was
Som Niyogi et al.
Aquatic toxicology (Amsterdam, Netherlands), 150, 36-44 (2014-03-19)
The freshwater pulmonate snail, Lymnaea stagnalis, is the most sensitive aquatic organism tested to date for Ni. We undertook a series of experiments to investigate the underlying mechanism(s) for this observed hypersensitivity. Consistent with previous experiments, juvenile snail growth in
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
Matej Adámik et al.
Biochemical and biophysical research communications, 456(1), 29-34 (2014-12-03)
Site-specific DNA recognition and binding activity belong to common attributes of all three members of tumor suppressor p53 family proteins: p53, p63 and p73. It was previously shown that heavy metals can affect p53 conformation, sequence-specific binding and suppress p53
Barbara Zambelli et al.
Metal ions in life sciences, 13, 321-357 (2014-01-29)
This review focuses on the impact of nickel on human health. In particular, the dual nature of nickel as an essential as well as toxic element in nature is described, and the main forms of nickel that can come in
Gintaras Svecevičius et al.
Bulletin of environmental contamination and toxicology, 92(4), 440-445 (2014-03-04)
One-year-old Atlantic salmon smolts were exposed for 2 weeks either to six priority heavy metal mixture or to Ni, Pb, and Cr singly at a concentration corresponding to Lithuanian inland water standards: Cu - 0.01, Zn - 0.1, Ni -
Picture of the month. Allergic contact dermatitis to nickel-containing dental work.
Emma F Johnson et al.
JAMA pediatrics, 167(6), 581-582 (2013-06-05)
Brenda L Bloodgood et al.
PLoS biology, 7(9), e1000190-e1000190 (2009-09-16)
Excitatory synapses on mammalian principal neurons are typically formed onto dendritic spines, which consist of a bulbous head separated from the parent dendrite by a thin neck. Although activation of voltage-gated channels in the spine and stimulus-evoked constriction of the
Huseyin Serencam et al.
Acta chimica Slovenica, 60(2), 287-293 (2013-07-25)
A simple and highly sensitive separation and preconcentration procedure, which has minimal impact on the environment, has been developed. The procedure is based on the carrier element free coprecipitation (CEFC) of Co(II), Cu(II), and Ni(II) ions by using 2-{4-[2-(1H-indol-3-yl)ethyl]-3-(4-methylbenzyl)-5-oxo-4,5-dihydro- 1H-1,2,4-triazol-l-yl}-N'-(pyridin-2-yl
Zong Xiang Liu et al.
The Chinese journal of dental research : the official journal of the Scientific Section of the Chinese Stomatological Association (CSA), 17(2), 111-116 (2014-12-23)
To evaluate morphological changes of the apical surface after root canal preparation with 1 mm beyond the apical foramen using ProTaper Universal (PTU) files, K3 files and Twisted files (TF), respectively. Seventy teeth with a centered apical foramen and 70
Page 1 of 6
Page 1 of 6