نتایج جستجو برای: old iron mining

تعداد نتایج: 583104  

A.K. Grover M.K. Pandit

Gold was obtained through washing or panning of the river sands during initial periods of civilisation. With the advent of knowledge of metallurgical processing of ores it was recovered through mining of in-situ quartz reefs, and then from auriferous sulphide ores. The metal mining activities are evidenced in the form of large number of ‘ancient metal mines’ or ‘old workings’ and ‘placer mining...

Journal: :Journal of trace elements in medicine and biology : organ of the Society for Minerals and Trace Elements 2014
Patrícia Ramos Agostinho Santos Nair Rosas Pinto Ricardo Mendes Teresa Magalhães Agostinho Almeida

The link between brain iron homeostasis and neurodegenerative disease has been the subject of extensive research. There is increasing evidence of iron accumulation during ageing, and altered iron levels in some specific brain regions in neurodegenerative disease patients have been reported. Using graphite furnace atomic absorption spectrometry after microwave-assisted acid digestion of the samp...

Journal: :Annals of hepatology 2014
Serena Pelusi Raffaela Rametta Claudia Della Corte Riccardo Congia Paola Dongiovanni Edoardo A Pulixi Silvia Fargion Anna L Fracanzani Valerio Nobili Luca Valenti

BACKGROUND & AIMS Juvenile hemochromatosis (JH) is a rare autosomal recessive disorder characterized by severe early-onset iron overload, caused by mutations in hemojuvelin (HJV), hepcidin (HAMP), or a combination of genes regulating iron metabolism. Here we describe two JH cases associated with simple heterozygosity for novel HJV mutations and unknown genetic factors. Case 1: A 12 year-old mal...

Journal: :JAMA 2005
Christina Ullrich Ann Wu Carrie Armsby Sarah Rieber Sarah Wingerter Carlo Brugnara David Shapiro Henry Bernstein

CONTEXT Current clinical practice relies on hemoglobin to detect iron deficiency, which misses infants not yet anemic and places them at higher risk for neurocognitive impairment. Reticulocyte hemoglobin content (CHr) has never been compared with hemoglobin for screening healthy infants. OBJECTIVES To evaluate CHr for detecting iron deficiency without anemia in healthy 9- to 12-month-old infa...

Journal: :Investigative ophthalmology & visual science 2009
Efrat Deleon Michal Lederman Eddy Berenstein Tal Meir Mordechai Chevion Itay Chowers

PURPOSE Altered iron metabolism was implicated in retinal and macular degeneration. This study was designed to further elucidate iron homeostasis during the course of retinal degeneration in mice. METHODS Retinal mRNA and protein expression of transferrin, transferrin receptor, and ceruloplasmin were evaluated during retinal degeneration in rd10 mice and chemokine receptor 2 (ccr2)-deficient ...

2015
Soo Jin Bae Geol Hwang Hyun Sik Kang Hyun Joo Song Weon Young Chang Young Hee Maeng Ki-Soo Kang

Cavernous hemangiomas of the gastrointestinal tract are extremely rare. In particular, the diagnosis of small bowel hemangiomas is very difficult in children. A 13-year-old boy presented at the outpatient clinic with dizziness and fatigue. The patient was previously diagnosed with iron-deficiency anemia at 3 years of age and had been treated with iron supplements continuously and pure red cell ...

Journal: :HERALD of North-Western State Medical University named after I.I. Mechnikov 2017

Journal: :Investigative ophthalmology & visual science 2009
Huiyi Chen Thomas J Lukas Nga Du Genn Suyeoka Arthur H Neufeld

PURPOSE Iron accumulation with age in the retinal pigment epithelium (RPE) may be one important source of oxidative stress that contributes to age-related macular degeneration (AMD). Young and old rodent RPE/choroid were compared to assess iron homeostasis during normal aging and the effects of increased iron on the functions of retinal pigment epithelial cells. METHODS The iron level, mRNA e...

Journal: :Revista medica de Chile 2001
F Jover L Andreu J Robert J Merino

The ingestion of iron-containing products is a potential toxicological emergency. It is a leading cause of pediatric unintentional ingestion fatalities because some iron-containing compounds are readily available (vitamin mixtures, iron pills). Among adults, it has been described as accidental overdoses (mainly in pregnancy) and as suicidal attempts. We report a 42 years old woman, admitted due...

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