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Iron absorption

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https://www.readbyqxmd.com/read/28814396/consumption-of-galacto-oligosaccharides-increases-iron-absorption-from-a-micronutrient-powder-containing-ferrous-fumarate-and-sodium-iron-edta-a-stable-isotope-study-in-kenyan-infants
#1
Daniela Paganini, Mary A Uyoga, Colin I Cercamondi, Diego Moretti, Edith Mwasi, Clarissa Schwab, Salome Bechtler, Francis M Mutuku, Valeria Galetti, Christophe Lacroix, Simon Karanja, Michael B Zimmermann
Background: Whether consumption of prebiotics increases iron absorption in infants is unclear.Objective: We set out to determine whether prebiotic consumption affects iron absorption from a micronutrient powder (MNP) containing a mixture of ferrous fumarate and sodium iron EDTA (FeFum+NaFeEDTA) in Kenyan infants.Design: Infants (n = 50; aged 6-14 mo) consumed maize porridge that was fortified with an MNP containing FeFum+NaFeEDTA and 7.5 g galacto-oligosaccharides (GOSs) (Fe+GOS group, n = 22) or the same MNP without GOSs (Fe group, n = 28) each day for 3 wk...
August 16, 2017: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28808986/interaction-effects-in-assembly-of-magnetic-nanoparticles
#2
N A Usov, O N Serebryakova, V P Tarasov
A specific absorption rate of a dilute assembly of various random clusters of iron oxide nanoparticles in alternating magnetic field has been calculated using Landau-Lifshitz stochastic equation. This approach simultaneously takes into account both the presence of thermal fluctuations of the nanoparticle magnetic moments and magneto-dipole interaction between the nanoparticles of the clusters. It is shown that for usual 3D clusters, the intensity of the magneto-dipole interaction is determined mainly by the cluster packing density η = N p V/V cl , where N p is the average number of the particles in the cluster, V is the nanoparticle volume, and V cl is the cluster volume...
August 14, 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28808954/heavy-metal-pollutants-in-selected-organs-of-african-giant-rats-from-three-agro-ecological-zones-of-nigeria-evidence-for-their-role-as-an-environmental-specimen-bank
#3
Ifukibot Levi Usende, Benjamin O Emikpe, James Olukayode Olopade
An assessment of the concentration of heavy metals in the liver, brain, kidney, bone, and lungs of African giant rats (AGRs) from three agro-ecological zones of Nigeria having different industrial activities was carried out using atomic absorption spectrophotometer. Twenty adult AGRs from cities in mangrove/freshwater swamp, rainforest, and woodland/tall grass savanna agro-ecological zones of Nigeria were used for this study. AGRs were euthanized, carefully dissected, and the brains, liver, lungs, bone, and kidneys were harvested, digested, and analyzed for concentrations of vanadium (V), lead (Pb), cadmium (Cd), zinc (Zn), selenium (Se), copper (Cu), and iron (Fe)...
August 14, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28806661/low-cost-and-non-fluoride-flowerlike-superhydrophobic-particles-fabricated-for-both-emulsions-separation-and-dyes-adsorption
#4
Fei Guo, Qiuying Wen, Zhiguang Guo
Green fluoride-free superhydrophobic hierarchical flowerlike iron-containing MnO2 particles were synthesized by a simple one-pot approach and subsequently modified by stearic acid. The special selective wettability toward water and oil makes the particle can be used in oil-in-water emulsion separation. In addition, the particle also can be applied as absorption material to remove dyes which are serious water contaminants. More importantly, as for the mixture of emulsion and dye, the particles also have the ability to remove both oil and dye, making the particles potential for wastewater purification in the future...
August 8, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28805937/new-data-on-hyperpigmentation-disorders
#5
REVIEW
S Schalka
Recently visible light (VL) and vascularization triggered by infrared light (IR) play a role in hyperpigmentation disorders of the skin. The aim of this article is to provide an update on the aetiology of hyperpigmentation disorders and means of prevention against UV, visible (VL) and infrared light (IR). The author conducted a literature review of the most recent data about hyperpigmentation disorders and means of prevention and protection. VL impacts on pigmentation, especially in individuals with phototype III, IV or V and also causes the production of Reactive Oxygen Species (ROS), erythema and DNA damage through ROS production as well as photodermatoses...
September 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/28805218/electrochemical-de-lithiation-of-silver-ferrite-and-composites-mechanistic-insights-from-ex-situ-in-situ-and-operando-x-ray-techniques
#6
Jessica L Durham, Alexander B Brady, Christina A Cama, David C Bock, Christopher J Pelliccione, Qing Zhang, Mingyuan Ge, Yue Ru Li, Yiman Zhang, Hanfei Yan, Xiaojing Huang, Yong Chu, Esther S Takeuchi, Kenneth J Takeuchi, Amy C Marschilok
The structure of pristine AgFeO2 and phase makeup of Ag0.2FeO1.6 (a one-pot composite comprised of nanocrystalline stoichiometric AgFeO2 and amorphous γ-Fe2O3 phases) was investigated using synchrotron X-ray diffraction. A new stacking-fault model was proposed for AgFeO2 powder synthesized using the co-precipitation method. The lithiation/de-lithiation mechanisms of silver ferrite, AgFeO2 and Ag0.2FeO1.6 were investigated using ex situ, in situ, and operando characterization techniques. An amorphous γ-Fe2O3 component in the Ag0...
August 14, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28801773/growth-performance-mineral-digestibility-and-blood-characteristics-of-ostriches-receiving-drinking-water-supplemented-with-varying-levels-of-chelated-trace-mineral-complex
#7
Hossein Seyfori, Hossein Ali Ghasemi, Iman Hajkhodadadi, Mohammad Hassan Nazaran, Maryam Hafizi
The effects of water supplementation of chelated trace minerals (CTM, which is named Bonzaplex designed with chelate compounds technology) on growth performance, apparent total tract digestibility (ATTD) of minerals, and some blood metabolites, TM, and antioxidant enzyme values in African ostriches were investigated from 8 to 12 months of age. A total of 20 8-month-old ostriches (five birds in five replicate pens) was randomly allocated into one of the following four treatments: (1) control (basal diet + tap water), (2) low CTM (basal diet +100 mg/bird/day CTM powder in tap water), (3) medium CTM (basal diet +1 g/bird/day CTM powder in tap water), and (4) high CTM (basal diet +2 g/bird/day CTM powder in tap water)...
August 11, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/28799938/improvement-of-phosphorus-removal-by-calcium-addition-in-the-iron-electrocoagulation-process
#8
I Mishima, M Hama, Y Tabata, J Nakajima
Small-scale wastewater treatment plants (SWTPs) are widely used as decentralized wastewater treatment systems in sparsely populated areas of Japan. Iron electrolysis, an electrocoagulation technology, is installed in these SWTPs for phosphorus removal. Phosphorus can be removed via the formation of an insoluble compound containing phosphate and iron, such as FePO4; however, it was necessary to determine the conditions under which phosphorus can be effectively and stably removed in actual SWTPs. According to previous studies using iron compounds, improved phosphorus removal was obtained by Ca addition...
August 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28799654/physicochemical-properties-and-extrusion-behaviour-of-selected-common-bean-varieties
#9
Hedwig Natabirwa, John H Muyonga, Dorothy Nakimbugwe, Mercy Lungaho
BACKGROUND: Extrusion processing offers the possibility of processing common beans industrially into highly nutritious and functional products. However, there is limited information on properties of extrudates from different beans varieties and their association with raw material characteristics and extrusion conditions. In this study, physicochemical properties of raw and extruded Bishaz, K131, NABE19, Roba1 and RWR2245 common beans were determined. The relationships between bean characteristics and extrusion conditions on the extrudate properties were analyzed...
August 11, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28797164/universal-surface-engineering-of-transition-metals-for-superior-electrocatalytic-hydrogen-evolution-in-neutral-water
#10
Bo You, Xuan Liu, Guoxiang Hu, Sheraz Gul, Junko Yano, De-En Jiang, Yujie Sun
The development of low-cost hybrid water splitting-biosynthetic systems that mimic natural photosynthesis to achieve solar-to-chemical conversion is of great promise for future energy demands, but often limited by the kinetically sluggish H2 evolu-tion reaction (HER) on the surface of nonprecious transition metal catalysts in neutral media. It is thus highly desirable to rationally tailor the reaction interface to boost the neutral HER catalytic kinetics. Herein, we report a general surface nitro-gen modification of diverse transition metals (e...
August 10, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28795681/-research-progress-of-iron-metabolism-in-critical-ill-patients
#11
Ling Xie, Shengnan Wang, Suyue Pan
Iron is an essential nutrient element for human, but has potential toxicity. Under physiological conditions, the processes of iron absorption, transportation, cellular uptake and utilization, storage, release, excretion as well as regulation of iron metabolism maintain the iron homeostasis. However under pathological conditions, the iron metabolism changes and is associated with the pathological states. In order to realize the relationship between the critical illness status and the iron metabolism, we start with an analysis of the basic processes of iron metabolism in human and the toxicity of iron, followed by summary on the alteration of iron metabolism in the settings of pathological conditions, such as inflammation, infection and anemia, which often occur in critical illness...
August 2017: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
https://www.readbyqxmd.com/read/28795369/trace-element-and-heavy-metal-levels-in-colorectal-cancer-comparison-between-cancerous-and-non-cancerous-tissues
#12
Masoudreza Sohrabi, Ali Gholami, MohammadHossein Hosseini Azar, Mohammad Yaghoobi, Maryamosadat Mirasgari Shahi, Solmaz Shirmardi, Mehdi Nikkhah, Zahra Kohi, Delaram Salehpour, Mahmood Reza Khoonsari, Gholamrez Hemmasi, Farhad Zamani, Mahmoudreza Sohrabi, Hossein Ajdarkosh
Cases of colorectal cancer (CRC) have increased dramatically in Middle Eastern and other Asian countries. Many studies indicate an important role of environmental factors, including trace elements as an etiology of cancer. This study aims to assess the concentration of eight trace elements in cancerous and adjacent non-cancerous tissues in case of CRC. In a cross-sectional study, conducted between March 2015 and February 2016, zinc (Zn), chromium (Cr), manganese (Mn), tin (Sn), copper (Cu), aluminum (Al), lead (Pb), and iron (Fe) levels were evaluated among patients suffering from CRC...
August 9, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/28792739/combined-xafs-spectroscopy-and-ab-initio-study-on-the-characterization-of-iron-incorporation-by-montmorillonite
#13
Annamária Kéri, Rainer Daehn, Matthias Krack, Sergey V Churakov
Iron occurs in clay minerals in both ferric and ferrous forms. Depending on its oxidation state and the environmental conditions, it can participate in redox reactions and influence the sorption processes at surfaces of clay minerals. Knowing the oxidation state and the preferential structural position of Fe2+ and Fe3+ is essential for the detailed understanding of the mechanism and kinetics of such processes. In this study, molecular dynamics (MD) calculations based on density functional theory (DFT+U) were applied to simulate the incorporated Fe in bulk montmorillonite and to explain the measured Fe K-edge X-ray absorption fine structure (XAFS) spectra...
August 9, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28791836/in-vivo-effects-of-curcumin-and-deferoxamine-in-experimental-endometriosis
#14
Gulnur Kizilay, Yesim Hulya Uz, Gulay Seren, Enis Ulucam, Ali Yilmaz, Ziya Cukur, Umit Ali Kayisli
BACKGROUND: Endometriosis is one of the most common chronic gynecological diseases. OBJECTIVES: The aim of the study was to examine the effects of curcumin and/or deferoxamine on cell proliferation in a rat model of endometriosis. MATERIAL AND METHODS: Thirty female 12-week-old albino Wistar rats, weighing 200-250 g, were used in this study. All the rats underwent ovariectomy and 0.1-mg β-estradiol 17-valerate pellets were placed intraperitoneally...
March 2017: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://www.readbyqxmd.com/read/28783317/kinetics-and-products-of-chromium-vi-reduction-by-iron-ii-iii-bearing-clay-minerals
#15
Claresta Joe-Wong, Gordon E Brown, Kate Maher
Hexavalent chromium is a water-soluble pollutant whose mobility can be controlled by reduction of Cr(VI) to less soluble, environmentally benign Cr(III). Iron(II/III)-bearing clay minerals are widespread potential reductants of Cr(VI), but the kinetics and pathways of Cr(VI) reduction by such clay minerals are poorly understood. We reacted aqueous Cr(VI) with two abiotically reduced clay minerals: an Fe-poor montmorillonite and an Fe-rich nontronite. The effects of ionic strength, pH, total Fe content, and the fraction of reduced structural Fe(II) (Fe(II)/Fe(total)) were examined...
August 7, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28780808/-determination-method-of-iron-and-its-inorganic-oxide-in-the-air-of-workplace
#16
S Song, H B Li, X F Pan, H F Yan
Objective: To establish the method for determination of iron and its inorganic oxide in the air of workplace. Methods: The iron and its inorganic oxide was collected by MCE filter membrane and then digested by electric heating digestion apparatus. Atomic absorption spectrophotometer (AAS) or inductively coupled plasma optical emission spectrometry (ICP-OES) was used for the detection of iron and its inorganic oxide. Results: The sampling efficiency was higher than 97%; under the 372.0 nm wavelength, the linearity of AAS was good at the range of 1...
May 20, 2017: Chinese Journal of Industrial Hygiene and Occupational Diseases
https://www.readbyqxmd.com/read/28780484/expression-of-hepcidin-and-ferroportin-in-full-term-placenta-of-pregnant-cows
#17
Sante Roperto, Valeria Russo, Chiara Urraro, Anna Cutarelli, Antonella Perillo, Francesca De Falco, Franco Roperto
Hepcidin (HEP) and ferroportin (FPN) play a central role in systemic iron homeostasis. The HEP/FPN axis controls both extracellular iron concentration and total body iron levels. HEP is synthesized mainly by hepatocytes and controls the absorption of dietary iron and the distribution of iron to the various cell types; its synthesis is regulated by both iron and innate immunity. FPN is a membrane protein and the major exporter of iron from mammalian cells, including iron recycling macrophages, iron absorbing duodenal enterocytes, and iron storing hepatocytes...
July 27, 2017: Theriogenology
https://www.readbyqxmd.com/read/28777912/effect-of-arsenic-on-the-formation-and-adsorption-property-of-ferric-hydroxide-precipitates-in-zvi-treatment
#18
Xing Peng, Beidou Xi, Ying Zhao, Qiantao Shi, Xiaoguang Meng, Xuhui Mao, Yonghai Jiang, Zhifei Ma, Wenbing Tan, Hongliang Liu, Bin Gong
Treatment of arsenic by zero-valent iron (ZVI) has been studied extensively. However, the effect of arsenic on the formation of ferric hydroxide precipitates in the ZVI treatment has not been investigated. We discovered that the specific surface area (ca. 187 m2/g) and arsenic content (ca. 67 mg/g) of the suspended solids (As-containing solids) generated in the ZVI treatment of arsenic solutions were much higher than the specific surface area (ca. 37 m2/g) and adsorption capacity (ca.12 mg/g) of the suspended solids (As-free solids) generated in the arsenic-free solutions...
August 4, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28774421/thalassaemia
#19
REVIEW
Ali T Taher, David J Weatherall, Maria Domenica Cappellini
Inherited haemoglobin disorders, including thalassaemia and sickle-cell disease, are the most common monogenic diseases worldwide. Several clinical forms of α-thalassaemia and β-thalassaemia, including the co-inheritance of β-thalassaemia with haemoglobin E resulting in haemoglobin E/β-thalassaemia, have been described. The disease hallmarks include imbalance in the α/β-globin chain ratio, ineffective erythropoiesis, chronic haemolytic anaemia, compensatory haemopoietic expansion, hypercoagulability, and increased intestinal iron absorption...
July 31, 2017: Lancet
https://www.readbyqxmd.com/read/28769992/salivary-proline-rich-protein-may-reduce-tannin-iron-chelation-a-systematic-narrative-review
#20
REVIEW
Nicole M Delimont, Sara K Rosenkranz, Mark D Haub, Brian L Lindshield
BACKGROUND: Tannins are often cited for antinutritional effects, including chelation of non-heme iron. Despite this, studies exploring non-heme iron bioavailability inhibition with long-term consumption have reported mixed results. Salivary proline-rich proteins (PRPs) may mediate tannin-antinutritional effects on non-heme iron bioavailability. AIM: To review evidence regarding biochemical binding mechanisms and affinity states between PRPs and tannins, as well as effects of PRPs on non-heme iron bioavailability with tannin consumption in vivo...
2017: Nutrition & Metabolism
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