Showing 1-30 of 38 resultados for "GF30681323"
Guenter Schwarz et al.
Metal ions in life sciences, 13, 415-450 (2014-01-29)
Molybdenum is an essential trace element and crucial for the survival of animals. Four mammalian Mo-dependent enzymes are known, all of them harboring a pterin-based molybdenum cofactor (Moco) in their active site. In these enzymes, molybdenum catalyzes oxygen transfer reactions...
Lidia Regoli et al.
The Science of the total environment, 435-436, 96-106 (2012-08-01)
In a regulatory context, bioaccumulation or bioconcentration factors are used for considering secondary poisoning potential and assessing risks to human health via the food chain. In this paper, literature data on the bioaccumulation of molybdenum in the aquatic organisms are...
Charles F Baker et al.
Dalton transactions (Cambridge, England : 2003), (9)(9), 1298-1303 (2004-07-15)
New molybdenum(VI) nitride oxides were synthesised by the reaction of strontium nitride and calcium nitride with molybdenum foil at high temperature in sealed stainless steel crucibles. The reactions yielded single crystalline products determined by X-ray diffraction to form complex structures...
Nga T Nguyen et al.
Journal of bioscience and bioengineering, 118(4), 386-391 (2014-04-23)
Membrane-bound formate dehydrogenase (FDH) was purified to homogeneity from a facultative anaerobic bacterium Citrobacter sp. S-77. The FDH from Citrobacter sp. S-77 (FDHS77) was a monomer with molecular mass of approximately 150 kDa. On SDS-PAGE, the purified FDHS77 showed as three...
Hanmei Hu et al.
Journal of nanoscience and nanotechnology, 14(6), 4462-4468 (2014-04-18)
A mild one-pot hydrothermal route has been successfully designed to controllably prepare orthorhombic alpha-MoO3 nanobelts and monoclinic MoO2 microaxletrees respectively by adjusting the dosage of (NH4)6M07O24 x 4H2O (AHM). The products are characterized by X-ray diffraction (XRD), field-emission scanning electron...
Ralf R Mendel et al.
Biochimica et biophysica acta, 1823(9), 1568-1579 (2012-03-01)
The transition element molybdenum (Mo) needs to be complexed by a special cofactor in order to gain catalytic activity. With the exception of bacterial Mo-nitrogenase, where Mo is a constituent of the FeMo-cofactor, Mo is bound to a pterin, thus...
Hideki Sugimoto et al.
Chemical Society reviews, 37(12), 2609-2619 (2008-11-21)
Recent characterisation of molybdenum and tungsten enzymes revealed novel structural types of reaction centres, as well as providing new subjects of interest as synthetic chemical analogues. This tutorial review highlights the structure/reactivity relationships of the enzyme reaction centres and chemical...
Tingyu Shi et al.
Journal of cellular biochemistry, 112(10), 2721-2728 (2011-06-17)
When intracelluar pathogens enter the host macrophages where in addition to oxidative and antibiotic mechanisms of antimicrobial activity, nutrients are deprived. Human pathogen Mycobacterium tuberculosis is one of macrophage parasitisms, which can replicate and persist for decades in dormancy state...
Maroor R A Pillai et al.
Journal of nuclear medicine : official publication, Society of Nuclear Medicine, 56(1), 159-161 (2014-12-30)
This paper discusses the benefits of obtaining (99m)Tc from non-fission reactor-produced low-specific-activity (99)Mo. This scenario is based on establishing a diversified chain of facilities for the distribution of (99m)Tc separated from reactor-produced (99)Mo by (n,γ) activation of natural or enriched...
Pl Morgan et al.
New Zealand veterinary journal, 62(3), 167-170 (2013-11-13)
Abstract A Jersey herd of 350 cows and 70 heifers located in the Taranaki region of New Zealand ceased milking in June 2011. Ten cows died during the subsequent 14 days. For at least 9 months, the cows had received...
Xiaohong Sun et al.
Journal of nanoscience and nanotechnology, 14(6), 4278-4285 (2014-04-18)
Carbon-coated MoO2 nanocrystallines with uniform particle size and carbon-coating morphology have been fabricated by a green and economical hydrothermal route and carbonization process. Glucose here acts as a multifunctional agent, not only as the reducing species to prepare MoO2, but...
P L Smedley et al.
Environmental monitoring and assessment, 186(10), 6403-6416 (2014-07-12)
An investigation has been carried out of molybdenum in drinking water from a selection of public supply sources and domestic taps across England and Wales. This was to assess concentrations in relation to the World Health Organization (WHO) health-based value...
Bernd Masepohl et al.
Advances in experimental medicine and biology, 675, 49-70 (2010-06-10)
The vast majority of the purple nonsulfur photosynthetic bacteria are diazotrophs, but the details of the complex regulation of the nitrogen fixation process are well understood only for a few species. Here we review what is known of the well-studied...
P Kielczynski et al.
IEEE transactions on ultrasonics, ferroelectrics, and frequency control, 46(1), 233-238 (2008-02-02)
In this paper the theoretical analysis and the results of testing of a piezoelectric cantilever for the investigation of material surfaces are presented. The cantilever consists of a thin piezoelectric plate bonded with a thin metal (e.g., molybdenum) foil. The...
Hongnan Cao et al.
Journal of natural products, 77(7), 1693-1699 (2014-07-26)
Xanthine oxidase catalyzes the sequential hydroxylation of hypoxanthine to uric acid via xanthine as intermediate. Deposition of crystals of the catalytic product uric acid or its monosodium salt in human joints with accompanying joint inflammation is the major cause of...
Manuel Tejada-Jiménez et al.
Metallomics : integrated biometal science, 5(9), 1191-1203 (2013-06-27)
The viability of plants relies on molybdenum, which after binding to the organic moiety of molybdopterin forms the molybdenum cofactor (Moco) and acquires remarkable redox properties. Moco is in the active site of critical molybdoenzymes, which use to work as...
Angel Llamas et al.
Metallomics : integrated biometal science, 3(6), 578-590 (2011-05-31)
Molybdenum (Mo) is a very scarce element whose function is fundamental in living beings within the active site of Mo-oxidoreductases, playing key roles in the metabolism of N, S, purines, hormone biosynthesis, transformation of drugs and xenobiotics, etc. In eukaryotes...
Yilin Hu et al.
Microbiology and molecular biology reviews : MMBR, 75(4), 664-677 (2011-12-01)
Nitrogenase catalyzes a key step in the global nitrogen cycle, the nucleotide-dependent reduction of atmospheric dinitrogen to bioavailable ammonia. There is a substantial amount of interest in elucidating the biosynthetic mechanisms of the FeMoco and the P-cluster of nitrogenase, because...
Ralf R Mendel
BioFactors (Oxford, England), 35(5), 429-434 (2009-07-23)
The transition element molybdenum (Mo) is an essential micronutrient that is needed as catalytically active metal during enzyme catalysis. In humans four enzymes depend on Mo: sulfite oxidase, xanthine oxidoreductase, aldehyde oxidase, and mitochondrial amidoxime reductase. In addition to these...
Felix Bulcke et al.
Nanotoxicology, 8(7), 775-785 (2013-07-31)
To test for consequences of an exposure of brain cells to copper oxide nanoparticles (CuO-NPs), we synthesised and characterised dimercaptosuccinate-coated CuO-NPs. These particles had a diameter of around 5 nm as determined by transmission electron microscopy, while their average hydrodynamic...
Ralf R Mendel
Journal of experimental botany, 58(9), 2289-2296 (2007-03-14)
The transition element molybdenum (Mo) is an essential micronutrient for plants where it is needed as a catalytically active metal during enzyme catalysis. Four plant enzymes depend on molybdenum: nitrate reductase, sulphite oxidase, xanthine dehydrogenase, and aldehyde oxidase. However, in...
Ralf R Mendel
The Journal of biological chemistry, 288(19), 13165-13172 (2013-03-30)
The transition element molybdenum needs to be complexed by a special cofactor to gain catalytic activity. Molybdenum is bound to a unique pterin, thus forming the molybdenum cofactor (Moco), which, in different variants, is the active compound at the catalytic...
Chantal Iobbi-Nivol et al.
Biochimica et biophysica acta, 1827(8-9), 1086-1101 (2012-12-04)
Molybdenum cofactor (Moco) biosynthesis is an ancient, ubiquitous, and highly conserved pathway leading to the biochemical activation of molybdenum. Moco is the essential component of a group of redox enzymes, which are diverse in terms of their phylogenetic distribution and...
Maria João Romão
Dalton transactions (Cambridge, England : 2003), (21)(21), 4053-4068 (2009-05-20)
Molybdenum and tungsten enzymes which contain the pyranopterin cofactor are ubiquitous in Nature and perform a wide variety of biological functions. They catalyze a diversity of mostly two-electron oxidation-reduction reactions crucial in the metabolism of nitrogen, sulfur and carbon. These...
Maria Lyra et al.
Hellenic journal of nuclear medicine, 14(1), 49-55 (2011-04-23)
The sleeping giant of molybdenum-99 ((99)Mo) production is grinding to a halt and the world is wondering how this happened. Fewer than 10 reactors in the world are capable of producing radio nuclides for medicine; approximately 50% of the world's...
Dattatray J Late et al.
Nanotechnology, 19(26), 265605-265605 (2008-07-02)
Nanocrystalline lanthanum hexaboride (LaB(6)) films have been deposited on molybdenum foil by the pulsed laser deposition (PLD) technique. The as-deposited films were characterized by x-ray diffraction (XRD), scanning electron microscopy (SEM) and atomic force microscopy (AFM). The XRD pattern shows...
Viswanathan S Saji et al.
ChemSusChem, 5(7), 1146-1161 (2012-06-14)
The electrochemical behaviors of molybdenum and its oxides, both in bulk and thin film dimensions, are critical because of their widespread applications in steels, electrocatalysts, electrochromic materials, batteries, sensors, and solar cells. An important area of current interest is electrodeposited...
Li Lv et al.
Journal of nanoscience and nanotechnology, 14(5), 3521-3526 (2014-04-17)
In this work, we report the size and shape-controlled synthesis of CaMoO4 nanocrystals with an aim of investigate their structural, electronic, and luminescent properties. The samples were carefully characterized by X-ray diffraction, transmission electron microscopy, Fourier transformed infrared spectroscopy, UV-vis...
Mohammad-Reza Rashidi et al.
Expert opinion on drug metabolism & toxicology, 6(2), 133-152 (2010-01-26)
Molybdenum hydroxylases, aldehyde oxidase and xanthine oxidase, are metalloflavoproteins that catalyze both oxidation and reduction of a broad range of drugs and other xenobiotics indicating the importance of these enzymes in drug oxidation, detoxification and activation. Both enzymes are also...
Claudio Pérez et al.
Environmental toxicology and chemistry, 33(10), 2217-2224 (2014-03-22)
High levels of oxyanions are found in the soil environment, often as a result of human activity. At high concentrations, oxyanions can be harmful to both humans and wildlife. Information about the interactions between oxyanions and natural samples is essential...

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