This thesis explores the behavior and distribution of key redox sensitive elements—Fe and Mn under spatially varied suboxic conditions along eastern boundary upwelling regions as compared to that of the non-redox sensitive, bioactive trace metal - Cu. The response of these metal…
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The formation of Fe(III) (oxyhydr)oxide precipitates from Fe(II) oxidation and/or Fe(III) hydrolysis is a key process that often governs the fate and bioavailability of contaminants and nutrients in natural and engineered systems. Electrocoagulation (EC) using Fe(0) electrodes i…
Atmospheric iron (Fe) is thought to play an important role in cloudwater chemistry (e.g., S(IV) oxidation, oxidant production, etc.), and is also an important source of Fe to certain regions of the world's oceans where Fe is believed to be a rate-limiting nutrient for primary pr…
The ability to acquire iron (Fe) is essential for the survival of most organisms. Pathogenic bacteria have evolved mechanisms to acquire organic Fe from the fluids and tissues of an infected animal host. One potential source of organic Fe found within the animal host is heme. Bo…
Iron is an essential nutrient of cells and is utilized in metabolic processes and in cell proliferation. However, iron overload has been associated with increased risk for cancer, including breast cancer. Redox cycling of catecholestrogen metabolites between quinone and hydroqui…
Atmospheric sampling of aerosol was carried out from ships during four separate month-long research cruises over remote oceanic regions. Three cruises took place in the Arabian Sea, during the inter-, SW- and NE-monsoons. An additional cruise was focused on the tropical North At…
The innovation of crucible steel, a high-carbon, homogeneous, slag-free steel, is regarded as a milestone in the history of the development of ferrous metallurgy. Associated in popular literature with the making of swords, particularly in the Early Islamic period, crucible steel…
The synthesis of pure tris(6-hydroxymethyl-2-pyridylmethyl)amine (H₃L₁₁) is reported for the first time. New complexes of H₃L₁₁ with copper(II), manganese(II) and iron(III) have been characterised by X-ray crystallography. Linear [Fe₃(L₁₁)₂](ClO₄)₃ reveals the tightest Fe-O-Fe a…
Phytoplankton growth is iron limited in at least 20% of the world’s oceans. Iron is an important nutrient required to synthesise enzymes necessary for photosynthesis, respiration, and nitrogen assimilation. Due to its low solubility in seawater, iron limitation of phytoplankton …
Speciation of sulfur and iron was investigated in the solid phase Black Sea sediments and high-temperature hydrothermal vent fluids of the 9°50'N East Pacific Rise and Lau Basin. Other than pyrite, solid phase sulfur in the upper Black Sea sediments existed as inorganic S(0) and…
Iron (Fe) and zinc (Zn) deficiencies are common during pregnancy. While pregnant women are routinely supplemented with Fe, Zn supplementation is also often recommended. However, the effects of maternal Fe and Zn deficiency and supplementation during pregnancy on infant Fe and Zn…
The first measurements of photoionization of Fe3+, Fe 5+, and Fe7+ ions were made using the ion-photon beam endstation on beamline 10.0.1 at the Advanced Light Source, where ion beams from an ECR source were merged with monochromatic beams of synchrotron radiation. The photoion-…
Iron is of great importance in neurodegenerative diseases. A considerable amount of work has been done to detect iron in the brain. But what still remains a challenge is quantifying iron deposits in brain tissue using non invasive techniques. Susceptibility Weighted Imaging (SWI…
Anemia of pregnancy remains highly prevalent in Senegal despite the national iron/folic acid (IFA) supplementation program, which consists of providing prescriptions to purchase IFA to women during prenatal visits. The purpose of this study was to provide a framework for recomme…
Estrogens induce renal tumors in the golden Syrian hamster, and serves as a mechanistic model of hormonal carcinogenesis. The goal of this study, is to provide evidence which supports the role of iron in estrogen-induced renal carcinogenesis in the hamster. Male hamsters were tr…