Showing 1-30 of 179 resultados for "


Reference method for measurement of the hepatic iron concentration.
Gary M Brittenham
American journal of hematology, 90(2), 85-86 (2014-12-10)
Stanley Zlotkin et al.
JAMA, 310(9), 938-947 (2013-09-05)
In sub-Saharan Africa, malaria is a leading cause of childhood morbidity and iron deficiency is among the most prevalent nutritional deficiencies. In 2006, the World Health Organization and the United Nations Children's Fund released a joint statement that recommended limiting...
Thomas A Russo et al.
Infection and immunity, 82(6), 2356-2367 (2014-03-26)
Hypervirulent (hypermucoviscous) Klebsiella pneumoniae (hvKP) strains are an emerging variant of "classical" K. pneumoniae (cKP) that cause organ and life-threatening infection in healthy individuals. An understanding of hvKP-specific virulence mechanisms that enabled evolution from cKP is limited. Observations by our...
Ellinor I B Peerschke et al.
American journal of clinical pathology, 142(4), 506-512 (2014-09-23)
Evaluation of anemia, particularly iron deficiency, in patients with cancer is difficult. This study examined using the hemoglobin content of reticulocytes (RET-He) to rule out iron deficiency, as defined by serum iron studies (transferrin saturation <20%, serum iron <40 μg/dL...
Wanmohd Azhar Wbin-Wan-Ibrahim et al.
Pakistan journal of pharmaceutical sciences, 26(4), 823-826 (2013-07-03)
Heavy metals in cigarette tobacco such as iron may cause a serious damage on human health. Surveys showed that the accumulation of certain toxic heavy metals like cadmium, mercury, iron is very often due to the effect of smoking. This...
Zille Rubab et al.
Saudi journal of kidney diseases and transplantation : an official publication of the Saudi Center for Organ Transplantation, Saudi Arabia, 26(1), 19-25 (2015-01-13)
Patients on hemodialysis (HD) are usually anemic because of defective erythropoeisis. Hepcidin is a polypeptide that regulates iron homeostasis and could serve as an indicator of functional iron deficiency in patients with end-stage renal disease (ESRD); this may also aid...
Mak A Saito et al.
Science (New York, N.Y.), 345(6201), 1173-1177 (2014-09-06)
Marine primary productivity is strongly influenced by the scarcity of required nutrients, yet our understanding of these nutrient limitations is informed by experimental observations with sparse geographical coverage and methodological limitations. We developed a quantitative proteomic method to directly assess...
Ping Luo et al.
Journal of environmental sciences (China), 25(11), 2344-2351 (2014-02-21)
Morphological changes within the porous architecture of laboratory scale zero valent iron (ZVI) permeable reactive barriers (PRBs), after exposure to different groundwater conditions, have been quantified experimentally for different ZVI/sand ratios (10%, 50% and 100%, W/W) with the aim of...
Yatrik M Shah et al.
Gastroenterology, 146(3), 630-642 (2014-01-07)
Iron is required for efficient oxygen transport, and hypoxia signaling links erythropoiesis with iron homeostasis. Hypoxia induces a highly conserved signaling pathway in cells under conditions of low levels of O2. One component of this pathway, hypoxia-inducible factor (HIF), is...
Wei Wang et al.
Journal of environmental sciences (China), 25(9), 1726-1735 (2014-02-14)
Bamboo charcoal (BC) was used as starting material to prepare Co-Fe binary oxideloaded adsorbent (Co-Fe-MBC) through its impregnation in Co(NO3)2, FeCl3 and HNO3 solutions simultaneously, followed by microwave heating. The low-cost composite was characterized and used as an adsorbent for...
N M Makarova et al.
Klinicheskaia laboratornaia diagnostika, (1)(1), 42-44 (2013-07-03)
The sample for examination included 52 patients with chronic cardiac failure and 26 patients with anemia amongst. The expected increase of production of prohepsidin against the background of increased serum concentrations of anti-inflammatory cytokines was not detected. The tendency to...
S J Geetha et al.
TheScientificWorldJournal, 2013, 315890-315890 (2013-12-10)
Under field conditions, inoculated rhizobial strains are at a survival disadvantage as compared to indigenous strains. In order to out-compete native rhizobia it is not only important to develop strong nodulation efficiency but also increase their competence in the soil...
Sohail Amjad et al.
Pakistan journal of pharmaceutical sciences, 27(3), 445-452 (2014-05-09)
In Pakistan, a funded flour fortification program was launched for malnourished population, residing mainly in rural low income areas, but the urban population having comparatively better nutritional as well as economic status was focused wherein excessive intake of fortificants might...
Robert C Hider et al.
Metal ions in life sciences, 13, 229-294 (2014-01-29)
Iron is a redox active metal which is abundant in the Earth's crust. It has played a key role in the evolution of living systems and as such is an essential element in a wide range of biological phenomena, being...
Erik T Yukl et al.
Biochemistry, 52(52), 9447-9455 (2013-12-11)
The di-heme enzyme MauG catalyzes the oxidative biosynthesis of a tryptophan tryptophylquinone cofactor on a precursor of the enzyme methylamine dehydrogenase (preMADH). Reaction of H2O2 with the diferric form of MauG, or reaction of O2 with diferrous MauG, forms the...
Laura M van Staalduinen et al.
Proceedings of the National Academy of Sciences of the United States of America, 111(14), 5171-5176 (2014-04-08)
The enzymes PhnY and PhnZ comprise an oxidative catabolic pathway that enables marine bacteria to use 2-aminoethylphosphonic acid as a source of inorganic phosphate. PhnZ is notable for catalyzing the oxidative cleavage of a carbon-phosphorus bond using Fe(II) and dioxygen...
Cecilia M Casadei et al.
Science (New York, N.Y.), 345(6193), 193-197 (2014-07-12)
Heme enzymes activate oxygen through formation of transient iron-oxo (ferryl) intermediates of the heme iron. A long-standing question has been the nature of the iron-oxygen bond and, in particular, the protonation state. We present neutron structures of the ferric derivative...
Janneke Balk et al.
Annual review of plant biology, 65, 125-153 (2014-02-07)
Iron is an essential element for all photosynthetic organisms. The biological use of this transition metal is as an enzyme cofactor, predominantly in electron transfer and catalysis. The main forms of iron cofactor are, in order of decreasing abundance, iron-sulfur...
Deniz Okumşoglu et al.
Water environment research : a research publication of the Water Environment Federation, 85(7), 604-620 (2013-08-16)
An acidic mining lake located in Can, Turkey was investigated to assess its water quality status and potential risk for environment. Morphological studies and water quality sampling were conducted to determine vertical and areal distributions of numerous water quality criteria...
Kurinchi Selvan Gurusamy et al.
The Cochrane database of systematic reviews, 12(12), CD010640-CD010640 (2015-01-01)
Anaemia affects about a quarter of the world's population. An estimated 50% of anaemic people have anaemia due to iron deficiency. To assess the safety and efficacy of iron therapies for the treatment of adults with anaemia who are not...
Darius J R Lane et al.
Biochimica et biophysica acta, 1845(2), 166-181 (2014-01-30)
Cancer is a major public health issue and, despite recent advances, effective clinical management remains elusive due to intra-tumoural heterogeneity and therapeutic resistance. Iron is a trace element integral to a multitude of metabolic processes, including DNA synthesis and energy...
Shaun D Wong et al.
Nature, 499(7458), 320-323 (2013-07-23)
Mononuclear non-haem iron (NHFe) enzymes catalyse a broad range of oxidative reactions, including halogenation, hydroxylation, ring closure, desaturation and aromatic ring cleavage reactions. They are involved in a number of biological processes, including phenylalanine metabolism, the production of neurotransmitters, the...
Matthew Stroh et al.
Biochemical pharmacology, 88(4), 573-583 (2013-12-24)
A popular, if not centric, approach to the study of an event is to first consider that of the simplest cause. When dissecting the underlying mechanisms governing idiopathic diseases, this generally takes the form of an ab initio genetic approach....
L Iu Milovanova et al.
Terapevticheskii arkhiv, 85(6), 17-24 (2013-07-23)
To study the clinical significance of determining the serum concentration of phosphorus and calcium metabolism regulators--the morphogenetic proteins FGF-23 and Klotho in patients with different stages of chronic kidney disease (CKD). The serum levels of FGF-23 (a human FGF-23 ELISA...
I P Zaĭtseva et al.
Voenno-meditsinskii zhurnal, 334(3), 36-40 (2013-07-03)
According to examination, with the help of emission spectrum analysis method, of 24 cadets-athletes of different specialization it was determined that during physical exercise in summer and in winter loss of ferrum and copper with excrements exceeded the intake if...
Don-Kyu Kim et al.
Nature medicine, 20(4), 419-424 (2014-03-25)
In response to microbial infection, expression of the defensin-like peptide hepcidin (encoded by Hamp) is induced in hepatocytes to decrease iron release from macrophages. To elucidate the mechanism by which Salmonella enterica var. Typhimurium (S. typhimurium), an intramacrophage bacterium, alters...
Donglei Wu et al.
Environmental technology, 34(17-20), 2663-2669 (2014-02-18)
In this study, nanoscale zero-valent iron (NZVI) was synthesized by conventional liquid-phase chemical reduction methods without a support material and then characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM) and X-ray diffraction (XRD). The effect of NZVI particles...
Joseph Marie Sieliechi et al.
Environmental technology, 35(13-16), 1831-1839 (2014-06-25)
In this study, spatial and seasonal variations of phosphorus fractions in Lake Bini sediments were evaluated using a sequential extraction method. The sampling of water and sediments (surface and coring) was carried out at seven sites around the lake during...
Ocean chemistry: Fingerprints of a trace nutrient.
Joseph A Resing et al.
Nature, 511(7508), 164-165 (2014-07-11)
Ocean Science. Microbial proteins and oceanic nutrient cycles.
C Mark Moore
Science (New York, N.Y.), 345(6201), 1120-1121 (2014-09-06)