Results 31 to 40 of about 146,771 (344)

An integrated study of the electrical parameters of the samples of magnetite ores in relation to their genesis and mineral composition (on the example of the Goroblagodatskoe skarn-magnetite deposit)

open access: yesИзвестия высших учебных заведений: Геология и разведка, 2019
The temperature dependences of electrical resistance (at DC and AC voltage at 1 kHz frequency) of the samples of the magnetite ore and magnetite from the contact of the syenite-porphyry with the volcanic-sedimentary rocks from the Goroblagodatskoye iron ...
V. V. Bakhterev
doaj   +1 more source

Magnetite in Sokli carbonatite massif and in Tulppio olivinite [PDF]

open access: yesBulletin of the Geological Society of Finland, 1981
Occurrence, ilmenite exsolutions and composition of magnetite in the carbonatite massif of Sokli and in the olivinite of Tulppio have been studied. In the carbonatite massif, magnetite of magmatic carbonatites is hypidio-idiomorphic, contains only very ...
K. Heinänen, H. Vartiainen
doaj   +1 more source

Mechanical Properties of Natural Chitosan/Hydroxyapatite/Magnetite Nanocomposites for Tissue Engineering Applications [PDF]

open access: yes, 2016
Chitosan (CS), hydroxyapatite (HA), and magnetite (Fe3O4) have been broadly employed for bone treatment applications. Having a hybrid biomaterial composed of the aforementioned constituents not only accumulates the useful characteristics of each ...
Akao   +57 more
core   +2 more sources

Controlled biomineralization of magnetite (Fe3O4) by Magnetospirillum gryphiswaldense [PDF]

open access: yes, 2008
Results from a study of the chemical composition and micro-structural characteristics of bacterial magnetosomes extracted from the magnetotactic bacterial strain Magnetospirillum gryphiswaldense are presented here.
Bauerlein   +12 more
core   +2 more sources

Necessity of electrically conductive pili for methanogenesis with magnetite stimulation [PDF]

open access: yesPeerJ, 2018
Background Magnetite-mediated direct interspecies electron transfer (DIET) between Geobacter and Methanosarcina species is increasingly being invoked to explain magnetite stimulation of methane production in anaerobic soils and sediments.
Oumei Wang   +4 more
doaj   +2 more sources

Electronic and magnetic structure of epitaxial NiO/Fe$_3$O$_4$(001) heterostructures grown on MgO(001) and Nb-doped SrTiO$_3$(001) [PDF]

open access: yes, 2016
We study the underlying chemical, electronic and magnetic properties of a number of magnetite based thin films. The main focus is placed onto NiO/Fe$_3$O$_4$(001) bilayers grown on MgO(001) and Nb-SrTiO$_3$(001) substrates.
Arenholz, E.   +11 more
core   +3 more sources

Porphyrin-magnetite nanoconjugates for biological imaging [PDF]

open access: yes, 2011
<p>Background: The use of silica coated magnetic nanoparticles as contrast agents has resulted in the production of highly stable, non-toxic solutions that can be manipulated via an external magnetic field.
Byrne, S.J.   +5 more
core   +3 more sources

Effect of Surface Functionalization on the Adsorption of Arsenic Using Magnetite Nanocrystals

open access: yesAdsorption Science & Technology, 2013
Bare-magnetite nanocrystals with an average size of 10 nm, synthesized using the co-precipitation method, were functionalized with sodium oleate (SO) in aqueous media.
T. Luna Pineda   +2 more
doaj   +1 more source

Interactions between magnetite and humic substances: redox reactions and dissolution processes

open access: yesGeochemical Transactions, 2017
Humic substances (HS) are redox-active compounds that are ubiquitous in the environment and can serve as electron shuttles during microbial Fe(III) reduction thus reducing a variety of Fe(III) minerals.
Anneli Sundman   +4 more
doaj   +1 more source

Superparamagnetic Poly (3-hydroxybutyrate-co-3 hydroxyvalerate) (PHBV) nanoparticles for biomedical applications [PDF]

open access: yes, 2013
Indexación: ScieloBackground: The progress in material science and the recent advances in biodegradable/biocompatible polymers and magnetic iron oxide nanoparticles have led to develop innovative diagnostic and therapeutic strategies for diseases based ...
Altbir, Dora   +6 more
core   +2 more sources

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