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Iron absorption

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https://www.readbyqxmd.com/read/29779806/iron-absorption-from-beans-with-different-contents-of-iron-evaluated-by-stable-isotopes
#1
Márcia Varella Morandi Junqueira-Franco, José Eduardo Dutra de Oliveira, Marilia Regini Nutti, Helton Santos Pereira, José Luiz Vianna de Carvalho, Steven A Abrams, Camila Fernanda Cunha Brandão, Júlio Sérgio Marchini
BACKGROUND: The introduction of biofortified foods such as beans with higher iron content may be a useful tool in preventing iron deficiency. The biofortification aims to reach the root of the problem of malnutrition, targets the neediest population, uses embedded distribution mechanisms, is scientifically feasible and effective in terms of cost, and complements other ongoing interventions to control micronutrient deficiency. However, to ensure effectiveness, measurement of the absorption of minerals is essential...
June 2018: Clinical Nutrition ESPEN
https://www.readbyqxmd.com/read/29777169/difructose-dianhydride-improves-intestinal-calcium-absorption-wound-healing-and-barrier-function
#2
Sang In Lee, In Ho Kim
The gastrointestinal tract (GIT) is critical for nutrient absorption and is an important barrier against harmful pathogens and antigens. Difructose anhydrides (DFA)-IVs are nondigestible disaccharides that enhance calcium and iron absorption by affecting the intestinal epithelial tissue. However, their effects on intestinal functions are not fully understood. In this study, we performed a feeding trial and found that dietary DFA-IVs improved growth performance, relative breast muscle and liver weight, and digestibility and blood calcium and iron concentrations in broilers...
May 18, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29776923/environmental-adaptability-for-quorum-sensing-regulating-iron-uptake-during-biofilm-formation-in-paracoccus-denitrificans
#3
Yang Zhang, Jie Gao, Lushan Wang, Shuangjiang Liu, Zhihui Bai, Xuliang Zhuang, Guoqiang Zhuang
Paracoccus denitrificans is a valuable model organism due to its versatile respiration capability and bioenergetic flexibility, both of which are critical to its survival in different environments. Quorum sensing (QS) plays a crucial role in the regulation of many cell functions; however, whether QS systems play a role in P. denitrificans is unknown. In this study, we demonstrated that iron uptake systems in P. denitrificans were directly regulated by a newly identified QS system. Genes coding for TonB-dependent systems, which transport chelated iron, were transcribed at higher levels in the QS-defective mutants...
May 18, 2018: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29773170/iron-and-innate-antimicrobial-immunity-depriving-the-pathogen-defending-the-host
#4
REVIEW
Manfred Nairz, Stefanie Dichtl, Andrea Schroll, David Haschka, Piotr Tymoszuk, Igor Theurl, Günter Weiss
The acute-phase response is triggered by the presence of infectious agents and danger signals which indicate hazards for the integrity of the mammalian body. One central feature of this response is the sequestration of iron into storage compartments including macrophages. This limits the availability of this essential nutrient for circulating pathogens, a host defence strategy known as 'nutritional immunity'. Iron metabolism and the immune response are intimately linked. In infections, the availability of iron affects both the efficacy of antimicrobial immune pathways and pathogen proliferation...
July 2018: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/29772226/potential-role-of-peroxisome-proliferator-activated-receptor-gamma-activation-on-serum-visfatin-and-trace-elements-in-high-fat-diet-induced-type-2-diabetes-mellitus
#5
Arshia Tabassum, Syeda Nuzhat Fatima Zaidi, Kausar Yasmeen, Tabassum Mahboob
AIMS: Electrolytes and trace elements dysregulation play an important role in the progression of obesity and diabetes complications. The present study was designed to evaluate the insulin sensitizing effects of peroxisomes proliferators activated receptor gamma (PPAR-γ) agonist on trace elements in obesity induced type 2 diabetes mellitus and correlate with serum visfatin. MATERIALS AND METHODS: Wistar rats were categorized into five groups. Group I served as control; Group II fed on high fat diet (HFD); Group III fed on HFD and treated with rosiglitazone (3 mg/kg) for 7 days; Group IV were T2DM rats induce by HFD and low dose of streptozotocin (i...
May 14, 2018: Life Sciences
https://www.readbyqxmd.com/read/29770841/arsenic-in-playground-soils-from-kindergartens-and-green-recreational-areas-of-bratislava-city-slovakia-occurrence-and-gastric-bioaccessibility
#6
Edgar Hiller, Lenka Filová, Ľubomír Jurkovič, Lucia Lachká, Tatsiana Kulikova, Mária Šimurková
In this study, playground soils of kindergartens and green recreational zones in Bratislava were investigated for the occurrence and gastric bioaccessibility of arsenic (As) in the < 150 μm soil size fraction. Eighty topsoil (0-10 cm) samples were collected from playgrounds in kindergartens and green recreational zones throughout the urban area. Bioaccessibility measurements of As were performed using the Simple Bioaccessibility Extraction Test that mimics the human gastric environment, and resulting extracts were analyzed by hydride generation-atomic absorption spectrometry to assess bioaccessible As concentrations in the collected playground soils...
May 16, 2018: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/29770687/spatial-associations-and-chemical-composition-of-organic-carbon-sequestered-in-fe-ca-and-organic-carbon-ternary-systems
#7
Tyler Sowers, Dinesh Adhikari, Jian Wang, Yu Yang, Donald L Sparks
Organo-mineral associations of organic carbon (OC) with iron (Fe) oxides play a major role in environmental OC sequestration, a process crucial to mitigating climate change. Calcium has been found to have high co-association with OC in soils containing high Fe content, increase OC sorption extent to poorly-crystalline Fe oxides, and has long been suspected to form bridging complexes with Fe and OC. Due to the growing realization that Ca may be an important component of C cycling, we launched a scanning transmission X-ray microscopy (STXM) investigation, paired with near-edge X-ray absorption fine structure (NEXAFS) spectroscopy, in order to spatially resolve Fe, Ca, and OC relationships and probe the effect of Ca on sorbed OC speciation...
May 17, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29769177/doguer-c-ha-j-h-gulec-s-vulpe-cd-anderson-gj-collins-jf-intestinal-hephaestin-potentiates-iron-absorption-in-weanling-adult-and-pregnant-mice-under-physiological-conditions-blood-adv-2017-1-17-1335-1346
#8
https://www.readbyqxmd.com/read/29768978/levels-of-serum-trace-elements-in-patients-with-peyronie
#9
Mustafa Gunes, Rahmi Aslan, Recep Eryılmaz, Halit Demir, Kerem Taken
AIM: The etiology of the disease of Peyronie is not certainly known. However, penile micro traumas are thought to be important in the pathogenesis of Peyronie's disease (PD) in genetically predisposed individuals. In this study, we aimed to determine the relationship of some trace element and heavy metals with PD. MATERIAL AND METHODS: Thirty Peyronie patients and 26 healthy volunteers were included in the study. In individuals in both groups, levels of serum trace elements (Manganese [Mn], Cu, Cobalt (Co), zinc [Zn], Cd, and iron [Fe]) were determined separately by Atomic Absorption Spectrophotometer method in Yüzüncü Yıl University Central Research Laboratory...
May 17, 2018: Aging Male: the Official Journal of the International Society for the Study of the Aging Male
https://www.readbyqxmd.com/read/29768904/comparative-analysis-of-physiological-impact-of-%C3%AE-fe%C3%A2-o%C3%A2-nanoparticles-on-dicotyledon-and-monocotyledon
#10
Jing Hu, Chan Wu, Hongxuan Ren, Yunqiang Wang, Junli Li, Jin Huang
Currently, the impact of nanoparticles (NPs) on plants is a provocative and promising field. As well-known, dicotyledon and monocotyledon show significant differences in the structural features of the roots and iron absorption mechanisms, and hence it is very meaningful to carry out the comparative study on the diverse impact of NPs on the physiological behaviors of monocotyledon and dicotyledon. In this study, two typical monocotyledon and dicotyledon crops, watermelon (Citrullus lanatus) and maize (Zea mays L...
January 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29765060/iron-specific-signal-separation-from-within-heavy-metal-stained-biological-samples-using-x-ray-microtomography-with-polychromatic-source-and-energy-integrating-detectors
#11
Tsvi Katchalski, Tom Case, Keun-Young Kim, Ranjan Ramachandra, Eric A Bushong, Thomas J Deerinck, Matthias G Haberl, Mason R Mackey, Steven Peltier, Guillaume A Castillon, Nobuko Fujikawa, Albert R Lawrence, Mark H Ellisman
Biological samples are frequently stained with heavy metals in preparation for examining the macro, micro and ultra-structure using X-ray microtomography and electron microscopy. A single X-ray microtomography scan reveals detailed 3D structure based on staining density, yet it lacks both material composition and functional information. Using a commercially available polychromatic X-ray source, energy integrating detectors and a two-scan configuration labelled by their energy- "High" and "Low", we demonstrate how a specific element, here shown with iron, can be detected from a mixture with other heavy metals...
May 15, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29763878/ca-containing-amendments-to-reduce-the-absorption-and-translocation-of-pb-in-rice-plants
#12
Jingxia Guo, Yunyun Li, Cong Hu, Shi Zhou, Hao Xu, Qijia Zhang, Guo Wang
The influence of three Ca-containing amendments (dolomite, slaked lime, and limestone) on soil water soluble Pb (Pb-w) levels, Pb accumulation by two rice plants (TJ-8, japonica and II-3301, indica), and the factors affecting Pb-w were investigated. Pot experiment was performed under waterlogged conditions using Pb-contaminated soil collected from an agricultural field near a mine. It was found that the soil amendments significantly reduced Pb content in the rice plants in the order dolomite > slaked lime > limestone, irrespective of rice cultivar...
May 12, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29763875/green-zero-valent-iron-nanoparticles-dispersion-through-a-sandy-column-using-different-injection-sequences
#13
António Soares, Sandra Ramos, Tomás Albergaria, Cristina Delerue-Matos
The contamination of soils is a global environmental problem that urges an increased effort to recover polluted sites. In Europe, there are an estimated 20,000 polluted sites that need to be remediated and around 350,000 sites that are classified as potentially contaminated by the European Environment Agency (EEA). Remediation is a part of the solution to this problem, requiring the most innovative and sustainable technologies. In this context, the use of zero valent iron nanoparticles (nZVI) is a promising, low cost and efficient technology for the remediation of soil and groundwater contaminated with a wide range of organic and inorganic pollutants...
May 12, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29757950/changes-in-arsenic-copper-iron-manganese-and-zinc-levels-resulting-from-the-application-of-poultry-litter-to-agricultural-soils
#14
Richard D Foust, Michael Phillips, Killian Hull, Dariia Yehorova
Twelve applications of poultry litter were made to a 2.1-ha field located in the Shenandoah Valley of Virginia, United States (USA), between March 1999 and August 2014. The field was planted with bermudagrass ( Cynodon dactylon ) and used as a pasture on an active farm. Copper, iron, manganese, zinc, and arsenic concentrations in the poultry litter were measured, and the application rates of these metals were calculated. The median application rates were: Cu, 1.32 kg/ha, Fe, 5.57 kg/ha, Mn, 1.80 kg/ha, Zn, 1...
May 14, 2018: Toxics
https://www.readbyqxmd.com/read/29757622/iron-vacancies-accommodate-uranyl-incorporation-into-hematite
#15
Martin E McBriarty, Sebastien Kerisit, Eric J Bylaska, Samuel Shaw, Katherine Morris, Eugene S Ilton
Radiotoxic uranium contamination in natural systems and nuclear waste containment can be sequestered by incorporation into naturally abundant iron (oxyhydr)oxides such as hematite (α-Fe<sub>2</sub>O<sub>3</sub>) during mineral growth. The stability and properties of the resulting uranium-doped material are impacted by the local coordination environment of incorporated uranium. While measurements of uranium coordination in hematite have been attempted using extended X-ray absorption fine structure (EXAFS) analysis, traditional shell-by-shell EXAFS fitting yields ambiguous results...
May 14, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29756573/lactoferrin-major-physiological-functions-and-applications
#16
Liyuan Hao, Qiang Shan, Jingya Wei, Fengtao Ma, Peng Sun
Lactoferrin (lactotransferrin; Lf) is an iron-binding glycoprotein and one of the most important bioactivators in milk and other external secretions. It has numerous biological roles, including the regulation of iron absorption and modulation of immune responses, and has anti-microbial, anti-viral, antioxidant, anti-cancer, and anti-inflammatory activities. Lf regulates the quantity of iron absorbed in the intestine via its role in iron transport and can also chelate iron, directly or indirectly. Notably, it has been used as an adjuvant therapy for some intestinal diseases...
May 14, 2018: Current Protein & Peptide Science
https://www.readbyqxmd.com/read/29755448/low-light-anoxygenic-photosynthesis-and-fe-s-biogeochemistry-in-a-microbial-mat
#17
Sebastian Haas, Dirk de Beer, Judith M Klatt, Artur Fink, Rebecca McCauley Rench, Trinity L Hamilton, Volker Meyer, Brian Kakuk, Jennifer L Macalady
We report extremely low-light-adapted anoxygenic photosynthesis in a thick microbial mat in Magical Blue Hole, Abaco Island, The Bahamas. Sulfur cycling was reduced by iron oxides and organic carbon limitation. The mat grows below the halocline/oxycline at 30 m depth on the walls of the flooded sinkhole. In situ irradiance at the mat surface on a sunny December day was between 0.021 and 0.084 μmol photons m-2 s-1 , and UV light (<400 nm) was the most abundant part of the spectrum followed by green wavelengths (475-530 nm)...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29752519/potential-toxic-metal-accumulation-in-soil-forage-and-blood-plasma-of-buffaloes-sampled-from-jhang-pakistan
#18
Zafar Iqbal Khan, Ilker Ugulu, Sara Umar, Kafeel Ahmad, Naunain Mehmood, Asma Ashfaq, Humayun Bashir, Muhammad Sohail
This study was conducted to determine the concentration of toxic metals in soil, forage and blood plasma of lactating and non-lactating buffaloes in the district Jhang, Punjab, Pakistan. Soil samples were collected from varying distances from the road side. Plasma separation was achieved by centrifugation. The concentration of arsenic (As), selenium (Se), cadmium (Cd), chromium (Cr), iron (Fe), zinc (Zn), copper (Cu) and cobalt (Co) were determined by using Atomic Absorption Spectrophotometer. The results of the study showed that the mean As, Se and Cd concentrations in soil samples were lower while Cr, Fe, Zn, Cu and Co were higher than the official guidelines...
May 12, 2018: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/29750517/agfeof-2-a-fluorine-rich-perovskite-oxyfluoride
#19
Fumitaka Takeiri, Takafumi Yamamoto, Naoaki Hayashi, Saburo Hosokawa, Kazunari Arai, Jun Kikkawa, Kazutaka Ikeda, Takashi Honda, Toshiya Otomo, Cédric Tassel, Koji Kimoto, Hiroshi Kageyama
We synthesized a silver iron oxyfluoride AgFeOF2 by using a high-pressure reaction. Synchrotron X-ray and neutron diffraction, X-ray absorption, and 57 Fe Mössbauer spectroscopy indicate that AgFeOF2 crystallizes in the ideal perovskite structure with iron in a trivalent state, although electron microscopy revealed weak super-reflections. A possible partial ordering in the FeO2 F4 octahedron is inferred from Mössbauer spectroscopy. The synthesis of the fluorine-rich sample offers an opportunity to study a composition-property relation in AFeIII O3- n F n ( n = 0, 1, and 2)...
May 11, 2018: Inorganic Chemistry
https://www.readbyqxmd.com/read/29750372/surface-bulk-and-interface-rational-design-of-hematite-architecture-toward-efficient-photo-electrochemical-water-splitting
#20
REVIEW
Chengcheng Li, Zhibin Luo, Tuo Wang, Jinlong Gong
Collecting and storing solar energy to hydrogen fuel through a photo-electrochemical (PEC) cell provides a clean and renewable pathway for future energy demands. Having earth-abundance, low biotoxicity, robustness, and an ideal n-type band position, hematite (α-Fe2 O3 ), the most common natural form of iron oxide, has occupied the research hotspot for decades. Here, a close look into recent progress of hematite photoanodes for PEC water splitting is provided. Effective approaches are introduced, such as cocatalysts loading and surface passivation layer deposition, to improve the hematite surface reaction in thermodynamics and kinetics...
May 11, 2018: Advanced Materials
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