Results 31 to 40 of about 39,957 (227)

Direct Formation of Structural Components Using a Martian Soil Simulant. [PDF]

, 2017
Martian habitats are ideally constructed using only locally available soils; extant attempts to process structural materials on Mars, however, generally require additives or calcination.
Chen, Tzehan, Chow, Brian J, Qiao, Yu, Zhong, Ying   +3 more
core   +1 more source

Mechanisms of goethite dissolution in the presence of desferrioxamine B and Suwannee River fulvic acid at pH 6.5 [PDF]

, 2013
Siderophores are Fe3+ specific low MW chelating ligands secreted by microorganisms in response to Fe stress. Low MW organic acids such as oxalate have been shown to enhance siderophore mediated dissolution of Fe3+ oxides.
Alvarez-Puebla, Angela G. Stewart, Borer, Brantley, Carrasco, Cervini-Silva, Cheah, Chin, Cocozza, Colnaghi Simionato, Cornell, Cornell, Cozar, Cramer, Dhungana, Domagal-Goldman, Dubbin, Edwards, Filius, Filius, Fu, Gan, Ghabbour, Haselwandter, Hay, Holmén, Holmén, Karen A. Hudson-Edwards, Kosmulski, Kraemer, Kraemer, Lasaga, Liermann, Nightingale, Pandeya, Powell, Prasad, Qu, Raymond, Reichard, Reichard, Ritchie, Schindler, Schwertmann, Sharma, Siebner-Freibach, Simanova, Sposito, Sposito, Stevenson, Stumm, Tatár, Tipping, Watteau, Weng, Weng, Whitnall, William E. Dubbin   +57 more
core   +1 more source

Comparative dissolution of natural goethite samples in HCl and HNO3

Journal of Applied Sciences and Environmental Management, 2009
The dissolution of goethite samples in mineral acids from to extreme parts of Nigeria (Osogbo and Kaduna) have been investigated. The rate of dissolution was found to be slightly faster in HCl than HNO3.
N Abdu-Salam, FA Adekola
doaj   +1 more source

Ferromanganese nodules and micro-hardgrounds associated with the Cadiz Contourite Channel (NE Atlantic): Palaeoenvironmental records of fluid venting and bottom currents [PDF]

, 2012
Ferromanganese nodule fields and hardgrounds have recently been discovered in the Cadiz Contourite Channel in the Gulf of Cadiz (850–1000 m). This channel is part of a large contourite depositional system generated by the Mediterranean Outflow Water ...
Abouchami, Al-Aasm, Albarède, Ambar, Ambar, Baraza, Baturin, Beal, Berner, Berner, Berner, Birgel, Blinova, Boetius, Bogdanov, Borowski, Brass, Bryden, Cabeçadas, Cacho, Cangemi, Chen, Chen, Chester, Claude, Claypool, Coleman, Dicus, Díaz-del-Río, Ercilla, Faugères, Faugères, Faugères, Fernández-Puga, Fietzke, Fietzke, Fomina, Fortin, Francisco Javier González, Frankel, García, Gardner, Gardner, Giresse, Glasby, González, González, González, González, González, Grootes, Grootes, Hamoumi, Han, Hartmann, Hein, Hein, Hein, Hein, Hein, Hensen, Hernández-Molina, Hernández-Molina, Hernández-Molina, Hinrichs, Hlawatsch, Hodell, ISA, International Seabed Authority, Jesús Martínez-Frías, José Eugenio Ortiz, Kasten, Kennett, Kenyon, Kohn, Konshauser, Koschinsky, Koschinsky, Kozlova, León, León, León, León, León, Llave, Llave, Llave, Loubere, Lovley, Luis Somoza, Madelain, Magalhães, Maldonado, Mangini, Manheim, Martín-Puertas, Massé, Mazurenko, McArthur, McArthur, Medialdea, Medialdea, Meese, Merinero, Mulder, Munsell Color Co, Nealson, Nealson, Nelson, Nelson, Nelson, Niemann, O'Neill-Barringer, O'Nions, Ochoa, Palmer, Palmer, Paull, Pautot, Peckmann, Peckmann, Pinheiro, Piper, Platt, Puteanus, Raúl Merinero, Rebesco, Reyss, Ricardo León, Robinson, Rogers, Rona, Rosario Lunar, Scholz, Sevastýanov, Sivkov, Somoza, Stadnitskaia, Stadnitskaia, Stein, Stow, Stow, Stumpf, Summerhayes, Taylor, Tebo, Tebo, Templer, Teresa Medialdea, Trinidad de Torres, Tucholke, Usui, Vegas, Veizer, Viana, Voelker, von Stackelberg, Walters, Webb, Zahn, Zheng   +159 more
core   +2 more sources

Goethite dissolution by acidophilic bacteria

Frontiers in Microbiology
Previous studies have reported the role of some species of acidophilic bacteria in accelerating the dissolution of goethite under aerobic and anaerobic conditions.
Srdjan Stanković, Srdjan Stanković, Axel Schippers   +2 more
doaj   +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

Magnetic and spectral signatures of Cerrado soils in the state of Goiás, Brazil [PDF]

Pesquisa Agropecuária Brasileira, 2017
: The objective of this work was to estimate the iron oxide contents (hematite and goethite) and to characterize the color and the spectral and magnetic signatures of Cerrado soils in the state of Goiás, Brazil.
Kathleen Lourenço Fernandes, Adriana Aparecida Ribon, José Marques Junior, Angélica Santos Rabelo de Souza Bahia, João Tavares Filho   +4 more
doaj   +1 more source

MINERALOGICAL AND TEXTURAL EVOLUTION OF THE ECONOMIC MANGANESE MINERALIZATION IN WESTERN RHODOPE MASSIF, N GREECE [PDF]

, 1991
The western Rhodope massif contains a significant number of 'battery grade' Mn-oxide deposits which are best developed in the area near Kato Nevrokopi, Drama district, N. Greece.
Nimfopoulos, M K, Pattrick, R A D
core   +1 more source

Hybrid Nanocomposites with Tunable Alignment of the Magnetic Nanorod Filler

, 2013
For many important applications, the performance of polymer-anisotropic particle nanocomposite materials strongly depends on the orientation of the nanoparticles.
Chanéac, Corinne, Constantin, Doru, Davidson, Patrick, Dozov, Ivan, Perineau, Fabien, Rochas, Cyrille, Rosticher, Céline, Rozes, Laurence, Sanchez, Clément   +8 more
core   +2 more sources

Using aircraft measurements to determine the refractive index of Saharan dust during the DODO Experiments [PDF]

, 2010
Much uncertainty in the value of the imaginary part of the refractive index of mineral dust contributes to uncertainty in the radiative effect of mineral dust in the atmosphere.
Formenti, P, Harrison, M. A. J., Highwood, E. J., McConnell, C. L.   +3 more
core   +1 more source