Results 51 to 60 of about 4,544 (181)

Mineralogical and Geochemical Constraints of the REE Accumulation in the Almásfüzitő Red Mud Depository in Northwest Hungary

Applied Sciences, 2019
Detailed mineralogical and geochemical study of red mud samples from Hungary suggests geological and geochemical processes that determine the spatial distribution of certain elements inside the red mud pitfalls. The major processes are the following: (1)
Tivadar M. Tóth, Félix Schubert, Béla Raucsik, Krisztián Fintor   +3 more
doaj   +1 more source

Effects of Iron Minerals on the Compressive Strengths and Microstructural Properties of Metakaolin-Based Geopolymer Materials

Gels, 2022
The current study aims to investigate the influence of iron minerals on the amorphous phase content, compressive strengths and the microstructural properties of the geopolymer materials.
Dimace Lionel Vofo Ngnintedem, Marco Lampe, Hervé Kouamo Tchakouté, Claus Henning Rüscher   +3 more
doaj   +1 more source

Iron Physiology and Its Impact on Atopic Diseases: An EAACI Taskforce Report

Allergy, EarlyView.
ABSTRACT Iron is essential for oxygen transport, energy metabolism, and immune regulation. Yet iron deficiency is the most common micronutrient disorder across all age groups, affecting nearly one quarter of the global population. Iron deficiency triggers nutritional immunity, a host defense mechanism that withholds and redistributes iron, contributing
Franziska Roth‐Walter, Ioana Agache, Beatriz Cabanillas, Roberto Berni Canani, Pasquale Comberiati, Holger Garn, Cristina Gomez‐Casado, Karin Hufnagl, Ekaterina Khaleva, Gregorio P. Milani, Daniel Munblit, Nikolaos Douladiris, Liam O'Mahony, Frank Redegeld, Carmen Riggioni, Peter K. Smith, Betty van Esch, Emilia Vassilopoulou, Carina Venter, Diego G. Peroni   +19 more
wiley   +1 more source

Creation of a 3D Goethite–Spongin Composite Using an Extreme Biomimetics Approach

Biomimetics, 2023
The structural biopolymer spongin in the form of a 3D scaffold resembles in shape and size numerous species of industrially useful marine keratosan demosponges.
Anita Kubiak, Alona Voronkina, Martyna Pajewska-Szmyt, Martyna Kotula, Bartosz Leśniewski, Alexander Ereskovsky, Korbinian Heimler, Anika Rogoll, Carla Vogt, Parvaneh Rahimi, Sedigheh Falahi, Roberta Galli, Enrico Langer, Maik Förste, Alexandros Charitos, Yvonne Joseph, Hermann Ehrlich, Teofil Jesionowski   +17 more
doaj   +1 more source

The Material Basis of 18th‐Century Meissen Porcelain

Archaeometry, EarlyView.
ABSTRACT In the summer of 1708, the quest for making hard‐paste porcelain from Saxonian clay and other mineral resources succeeded. This was achieved by applying as its essential ingredient newly discovered pure kaolin from Heidelsberg near Aue, western Saxon Ore Mountains.
Robert B. Heimann
wiley   +1 more source

Advanced aqueous alteration in primitive meteorites: Micro‐ to nanoscale studies of CR1 iron sulfides

Meteoritics &Planetary Science, EarlyView.
Abstract This study documents micro‐ to nanoscale observations of primary nebular and secondary parent body iron sulfides in the CR1 GRO 95577. Despite the extensive alteration of the bulk sample, some primary sulfides managed to avoid alteration, having originally formed in the solar nebula during chondrule formation by either fission‐sulfidization or
S. A. Singerling
wiley   +1 more source

Goethite Hinders Azo Dye Bioreduction by Blocking Terminal Reductive Sites on the Outer Membrane of Shewanella decolorationis S12

Frontiers in Microbiology, 2019
Iron (hydr)oxides are the most ubiquitous Fe(III)-containing minerals in the near-surface environments and can regulate organic pollutant biotransformation by participating in bacterial extracellular electron transfer under anaerobic conditions ...
Gang Zhao, Gang Zhao, Enze Li, Enze Li, Jianjun Li, Jianjun Li, Feifei Liu, Feifei Liu, Fei Liu, Fei Liu, Meiying Xu, Meiying Xu   +11 more
doaj   +1 more source

Nature, origin, and phosphorylation potential of the phosphorus/sulfur‐bearing nanoscale multiphasic assemblages in the CM chondrites Murchison and Murray

Meteoritics &Planetary Science, EarlyView.
Abstract Carbonaceous chondrites contain phosphorus, whose speciation and thus history remain to be investigated. Phosphorus/sulfur‐bearing assemblages have been reported in carbonaceous CM chondrites, but there is no consensus about their exact compositions and origins.
Valentine Megevand, Sylvain Bernard, Corentin Le Guillou, Roberto Conconi, François Guyot   +4 more
wiley   +1 more source

Fire Promotes Arsenic Mobilization and Rapid Arsenic(III) Formation in Soil via Thermal Alteration of Arsenic-Bearing Iron Oxides

Frontiers in Earth Science, 2019
Arsenic in oxic surface soils readily associates with Fe(III) oxide minerals such as ferrihydrite and goethite, predominantly as As(V). Fires are a common feature in many landscapes, creating high-temperature soil conditions which drive thermal ...
Scott G. Johnston, Niloofar Karimian, Edward D. Burton   +2 more
doaj   +1 more source

Selective leaching of nickel from prereduced limonitic laterite under moderate HPAL conditions- part I: Dissolution [PDF]

Journal of Mining and Metallurgy. Section B: Metallurgy, 2016
High pressure acid leaching (HPAL) is the primary method for extraction of nickel from limonitic laterite. The severe operating conditions, the complexity of facilities, and several technical problems, such as scale formation, have always ...
Chang Y., Zhao K., Pešić B.
doaj   +1 more source