نتایج جستجو برای: iron archaeometallurgy

تعداد نتایج: 142538  

A Hashemi, B Rahimi, M Noroozi, N Valizadeh, S Hejazi, Sh Nateghi, V Alinejad,

Abstract Background Iron overload is the main transfusion related side effects in patients with transfusion dependent hemoglobinopathies. Severe iron deposition in tissues leads to organ dysfunction. Many organs can be affected such as heart, liver, and endocrine organs. Cardiac failure and liver fibrosis are the consequent of Iron overload in transfusion dependent hemoglobinopathy. Magne...

E Mostafavi F Fatehi F Gheibi F Siassi M Jalali N Jarollahi R Ghiasvand

Introduction: Anemia in pregnancy is a significant public health problem especially in developing countries. Iron deficiency anemia in pregnancy may lead to increased risks of preterm delivery, Low birth weight and still birth. This study was undertaken to detect iron deficiency anemia in pregnant women referring to health care centers of Eslamshahr/Iran. Method: In this study, 266 selected pre...

لطیف زاده, سیدضیاء الدین, کاظمی, احمد,

Iron deficiency is the most common form of nutritional deficiency in the world. Among different sex and age groups of population pregnant women and infants seems to be in higher risk to develope iron deficiency. According to recent data about half of the pregnant women suffer from iron deficiency. In order ot investigate the prevalance of iron deficiency and iron deficiency anemia in pregnant w...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2005
Ehud Banin Michael L Vasil E Peter Greenberg

Iron serves as a signal in Pseudomonas aeruginosa biofilm development. We examined the influence of mutations in known and putative iron acquisition-signaling genes on biofilm morphology. In iron-sufficient medium, mutants that cannot obtain iron through the high-affinity pyoverdine iron acquisition system form thin biofilms similar to those formed by the parent under low iron conditions. If an...

Journal: :Journal of environmental sciences 2009
Xinjun Wang Xueping Chen Jing Yang Zhaosu Wang Guoxin Sun

The potential of microbial mediated iron plaque reduction, and associated arsenic (As) mobility were examined by iron reducing bacteria enriched from As contaminated paddy soil. To our knowledge, this is the first time to report the impact of microbial iron plaque reduction on As mobility. Iron reduction occurred during the inoculation of iron reducing enrichment culture in the treatments with ...

Journal: :Journal of the American Society of Nephrology : JASN 1996
R Baliga N Ueda S V Shah

In the study presented here, the iron status in the kidney in passive Heymann nephritis, a complement-dependent model of membranous nephropathy, was examined. To examine whether the effect of immune injury on iron status has a pathogenic role, the effect of an iron-deficient diet was also determined. Injection of the anti-Fx1A antibody (10 mg/100 g body wt) in Sprague-Dawley rats resulted in no...

Journal: :Physiological reviews 2013
Tomas Ganz

The iron hormone hepcidin and its receptor and cellular iron exporter ferroportin control the major fluxes of iron into blood plasma: intestinal iron absorption, the delivery of recycled iron from macrophages, and the release of stored iron from hepatocytes. Because iron losses are comparatively very small, iron absorption and its regulation by hepcidin and ferroportin determine total body iron...

2006
Ivana De Domenico Diane McVey Ward Giovanni Musci Jerry Kaplan

Mammalian iron homeostasis is dominated by the fact that there is no normal excretory route for iron. Iron homeostasis is regulated at the level of intestinal absorption by the body’s demand for iron. In normal adults, iron absorption matches the rate of iron loss due to desquamification or intestinal sloughing. Iron absorption can be increased in response to increased need deriving from events...

2013
Veronica Fiorito Simonetta Geninatti Crich Lorenzo Silengo Silvio Aime Fiorella Altruda Emanuela Tolosano

PURPOSE The body concentration of iron is regulated by a fine equilibrium between absorption and losses of iron. Iron can be absorbed from diet as inorganic iron or as heme. Hemopexin is an acute phase protein that limits iron access to microorganisms. Moreover, it is the plasma protein with the highest binding affinity for heme and thus it mediates heme-iron recycling. Considering its involvem...

1998
Gary J. Long Dimitri Hautot Quentin A. Pankhurst Valérie Briois Kenneth S. Suslick

The Mössbauer spectra of amorphous iron, prepared by using sonochemical methods, exhibit a broad magnetic hyperfine sextet at both 78 and 295 K. The spectra do not change with time if the amorphous iron is not exposed to oxygen or moisture. An analysis of the spectra with the method of Lines and Eibschütz yields average magnetic hyperfine fields of 29.1 and 25.9 T at 78 and 295 K, respectively....

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