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Zinc and copper toxicity in host defense against pathogens: Mycobacterium tuberculosis as a model example of an emerging paradigm.
Olivier Neyrolles et al.
Frontiers in cellular and infection microbiology, 3, 89-89 (2013-12-19)
Goldie Songra et al.
American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics, 145(5), 569-578 (2014-05-03)
The aim of this study was to compare the time to initial alignment and extraction space closure using conventional brackets and active and passive self-ligating brackets. One hundred adolescent patients 11 to 18 years of age undergoing maxillary and mandibular...
M Pelà et al.
Die Pharmazie, 69(7), 496-499 (2014-07-31)
The synthesis of non natural amino acid 2-amino-3,3,4-trimethyl-pentanoic acid (Ipv) ready for solid phase peptide synthesis has been developed. Copper (I) chloride Michael addition, followed by a Curtius rearrangement are the key steps for the lpv synthesis. The racemic valine/leucine...
Helena Stecka et al.
Environmental monitoring and assessment, 186(10), 6145-6155 (2014-05-30)
A simple and fast solid phase extraction procedure was developed to pre-concentrate traces of Cu and Zn prior to their determination in honey samples by flame atomic absorption spectrometry. The sample preparation included dissolution of honey samples and the passage...
Luan Zhang et al.
Ecotoxicology and environmental safety, 104, 278-284 (2014-04-15)
In the current study, we hypothesize that mine (metallicolous) populations of metallophytes form a trade-off between the roots and shoots when under copper (Cu) stress to adapt themselves to heavy metal contaminated habitats, and thus, differ from normal (non-metallicolous) populations...
Shaojuan Song et al.
Yi chuan = Hereditas, 36(12), 1261-1268 (2014-12-10)
Copper plays critical roles in biological system; however, it is toxic in excess. To identify novel genes involved in copper metabolism, we performed a whole genome-wide genetic screen in C. elegans model organism to search for mutants which are resistant...
Norbert Ondo Zue Abaga et al.
Chemosphere, 113, 42-47 (2014-07-30)
In Burkina-Faso, urban vegetable agriculture is often characterized by urban solid waste fertilizer inputs containing heavy metals such as Cu and Cd. Thus, the relevance of surrounding urban vegetable plots with vetiver hedges to reduce environmental pollution by Cu and...
Duygu Cagirdi et al.
Journal of AOAC International, 97(4), 1137-1142 (2014-08-26)
A simple and selective separation and preconcentration method was developed for the determination of Cu(ll) ions. This method is based on adsorption of Cu(ll) ions from aqueous solution on a bis(3-aminopropyl)amine modified silica gel column and flame atomic absorption spectrometric...
Xiaowen Xu et al.
Organic letters, 16(13), 3540-3543 (2014-06-17)
A novel straightforward synthesis of both symmetrical and unsymmetrical 2,4-disubstituted-1,3,5-triazines via aerobic copper-catalyzed cyclization of amidines with DMF as a one-carbon synthon has been developed. The presented method allows synthesizing the products that are currently inaccessible or challenging to prepare...
Sejal Shah et al.
Survey of ophthalmology, 59(1), 115-123 (2013-10-12)
The dense accumulation of copper in Descemet membrane and lens capsule is the characteristic manifestation of a circulating monoclonal antibody with strong affinity for copper. The overproduction of this monoclonal immunoglobulin may be associated with either multiple myeloma or a...
Metals: setting a trap for copper.
Valeria Culotta
Nature chemical biology, 10(12), 986-987 (2014-10-27)
Sonia Melino et al.
The FEBS journal, 281(3), 657-672 (2013-11-14)
Natural antimicrobial peptides represent a primordial mechanism of immunity in both vertebrate and nonvertebrate organisms. Among them, histatins belong to a family of human salivary metal-binding peptides displaying potent antibacterial, antifungal and wound-healing activities. These properties, along with the ability...
Vivien W W Bao et al.
Aquatic toxicology (Amsterdam, Netherlands), 157, 81-93 (2014-12-03)
Zinc pyrithione (ZnPT) is a widely used booster biocide in combination with copper (Cu) in antifouling paints as a substitute for tributyltin. The co-occurrence of ZnPT and Cu in coastal marine environments is therefore very common, and may pose a...
Rupert Purchase
Science progress, 96(Pt 3), 213-223 (2013-11-20)
Wilson's disease (hepatolenticular degeneration) is a rare inherited autosomal recessive disorder of copper metabolism leading to copper accumulation in the liver and extrahepatic organs such as the brain and cornea. Patients may present with combinations of hepatic, neurological and psychiatric...
Economic geology. Seafloor mining plan advances, worrying critics.
Carolyn Gramling
Science (New York, N.Y.), 344(6183), 463-463 (2014-05-03)
Quanying Wang et al.
Environmental monitoring and assessment, 187(1), 4121-4121 (2014-11-20)
Accumulations of copper in orchard soils and fruit trees due to the application of Cu-based fungicides have become research hotspots. However, information about the sampling strategies, which can affect the accuracy of the following research results, is lacking. This study...
M Tajuddin Sikder et al.
Water environment research : a research publication of the Water Environment Federation, 86(4), 296-304 (2014-05-24)
Beta-cyclodextrin (beta-CD) cross-linked with epichlorohydrin to form water insoluble beta-cyclodextrin polymer (beta-CDP) has been shown to be an effective sorbent for sorption of organic particles, but the sorption of copper (Cu2+) in aqueous solutions by beta-CDP has not been conducted....
Giuseppe Inesi et al.
The Biochemical journal, 463(2), 167-176 (2014-09-23)
Copper ATPases, in analogy with other members of the P-ATPase superfamily, contain a catalytic headpiece including an aspartate residue reacting with ATP to form a phosphoenzyme intermediate, and transmembrane helices containing cation-binding sites [TMBS (transmembrane metal-binding sites)] for catalytic activation...
Marten H Vos et al.
Biochimica et biophysica acta, 1847(1), 79-85 (2014-08-15)
The catalytic site of heme-copper oxidases encompasses two close-lying ligand binding sites: the heme, where oxygen is bound and reduced and the CuB atom, which acts as ligand entry and release port. Diatomic gaseous ligands with a dipole moment, such...
Geir Bjorklund
Acta neurobiologiae experimentalis, 73(2), 225-236 (2013-07-05)
Autism spectrum disorders (ASDs) are a group of developmental disabilities that can cause significant social, communication and behavioral challenges. Several studies have suggested a disturbance in the copper (Cu) and zinc (Zn) metabolism in ASDs. Zinc deficiency, excess Cu levels...
Copper rewired.
Nature, 508(7495), 150-150 (2014-04-12)
Amna I Dermish et al.
Expert review of medical devices, 10(4), 477-488 (2013-07-31)
Worldwide, 40% of all pregnancies are unintended. Widespread, over-the-counter availability of oral emergency contraception (EC) has not reduced unintended pregnancy rates. The EC visit presents an opportunity to initiate a highly effective method of contraception in a population at high...
Pablo Lozano et al.
Ecotoxicology and environmental safety, 104, 294-301 (2014-04-15)
There is a need to develop efficient tools to prevent damage to marine ecosystems due to pollution. Since microalgae play a key role in marine ecosystems, they are considered potentially useful for quick and sensitive toxicity bioassays. In this study...
A Di Veroli et al.
Chemosphere, 112, 9-17 (2014-07-23)
Mouthpart deformities of Chironomus riparius larvae (Diptera) have been investigated to evaluate the toxic effects of contamination by heavy metals in the Genna Stream (Central Italy), situated in an area subjected to intensive swine farms (40000 heads). The livestock farming...
Jonas Duus Stevens Lekfeldt et al.
Environmental pollution (Barking, Essex : 1987), 194, 78-85 (2014-08-06)
Copper (Cu) is known to accumulate in agricultural soils receiving urban waste products as fertilizers. We here report the use of the leucine incorporation technique to determine pollution-induced community tolerance (Leu-PICT) to Cu in a long-term agricultural field trial. A...
Parthasarathi Chakraborty et al.
Environmental pollution (Barking, Essex : 1987), 194, 138-144 (2014-08-12)
The current study aims to understand the speciation and fate of Cu complexes in hydrothermally altered sediments from the Central Indian Ocean Basin and assess the probable impacts of deep-sea mining on speciation of Cu complexes and assess the Cu...
Wei-Dan Jiang et al.
Aquatic toxicology (Amsterdam, Netherlands), 155, 301-313 (2014-08-05)
The brain is the center of the nervous system in all vertebrates, and homeostasis of the brain is crucial for fish survival. Copper (Cu) is essential for normal cellular processes in most eukaryotic organisms but is toxic in excess. Although...
Fabio Perlatti et al.
The Science of the total environment, 500-501, 91-102 (2014-09-14)
The potentially hazardous effects of rock wastes disposed at open pit in three different areas (Pr: Ore processing; Wr: Waste rock and Bd: Border) of an abandoned copper mine were evaluated in this study, with emphasis on acid drainage generation...
Renée C Pompei-Reynolds et al.
American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics, 146(2), 215-226 (2014-08-03)
The manufacturing process for copper-nickel-titanium archwires is technique sensitive. The primary aim of this investigation was to examine the interlot consistency of the mechanical properties of copper-nickel-titanium wires from 2 manufacturers. Wires of 2 sizes (0.016 and 0.016 × 0.022...
Hamid Fazelirad et al.
Journal of AOAC International, 97(4), 1159-1166 (2014-08-26)
A new and selective Cu(ll) ion imprinted polymer was prepared by formation of 1-(2-pyridylazo)-2-naphthol complex for selective extraction and preconcentration of Cu ions. Polymerization was performed with ethylene glycol dimethacrylate as a crosslinking monomer and methacrylic acid as a functional...
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