Results 61 to 70 of about 156,182 (239)

Gypsum-based management practices to prevent phosphorus transportation [PDF]

, 2008
Phosphogypsum from Siilinjärvi plant were tested in soil incubation-leaching-studies(I), and in liquid pig manure treatment (II) in farm pit. In soil columns, gypsum additions significantly reduced erodibility and ortho-P concentrations in the ...
Pietola, Liisa
core  

Holistic approach to dissolution kinetics : linking direction-specific microscopic fluxes, local mass transport effects and global macroscopic rates from gypsum etch pit analysis [PDF]

, 2013
Dissolution processes at single crystal surfaces often involve the initial formation and expansion of localized, characteristic (faceted) etch-pits at defects, in an otherwise comparatively unreactive surface.
Abendan, Alonso-Azcárate, Alonso-Azcárate, Arvidson, Bard, Binnig, Blum, Blum, Bosbach, Bosbach, Bosbach, Brantley, Brown, Buchanan, Burns, Burt, Cama, Cama, Chen, Chow, Chow, Christoffersen, Colombani, Colombani, Compton, Compton, Compton, Dove, Engstrom, Fan, Fleischmann, Ford, Forster, Fujiwara, Gasperino, Hall, Hartman, Heinze, Hong, Howell, Jeschke, Jeschke, Jones, Jones, Jordan, Kowacz, Lasaga, Lasaga, Levich, Liu, Lüttge, Lüttge, Lüttge, MacInnis, Macpherson, Macpherson, Macpherson, Macpherson, Martin A. Edwards, Massimo Peruffo, Mbogoro, McGeouch, McGeouch, Michael M. Mbogoro, Morel, Morse, Nancollas, Olhoeft, Orton, Pachon-Rodriguez, Patrick R. Unwin, Peltonen, Ruiz-Agudo, Ruiz-Agudo, Ruiz-Agudo, Sangwal, Schecher, Schofield, Singh, Stumm, Svensson, Tang, Tang, Tang, Taylor, Titiz-Sargut, Unwin, Unwin, Van Driessche, Van Rosmalen, Vanysek, Vavouraki, Wang, White, Wightman, Zhang   +95 more
core   +1 more source

The damage and failure mechanism of prestatically loaded rock during medium‐strain rate cyclic impact loading

Deep Underground Science and Engineering, EarlyView.
Based on experimental results and theoretical analysis, an established rock damage accumulation model that comprehensively considers the preapplied static load, impact peak value, impact frequency, and impact times. Abstract To study the rock damage mechanism under high static loading and superimposed medium strain rate cyclic impact loading, a series ...
Wei Wang, Hanpeng Wang, Zicheng Wang, Xinyuan Xie, Yunhao Wu, Jinhou Zhang, Dekang Sun   +6 more
wiley   +1 more source

Spatiotemporal pattern of gypsum blooms in the Salton Sea, California, during 2000-2018

International Journal of Applied Earth Observations and Geoinformation, 2020
Algal blooms and the resulting deterioration of water quality have threatened the environmental health of inland lakes. This study investigated the spatiotemporal dynamics of gypsum blooms in the Salton Sea, the largest inland water body in California ...
Jinge Ma, Hongtao Duan, Liyuan He, Mary Tiffany, Zhigang Cao, Tianci Qi, Ming Shen, Trent Biggs, Xiaofeng Xu   +8 more
doaj   +1 more source

Multiple injection techniques to stimulate complex fracture networks in coal reservoirs: A case study on gas disaster reduction of subsurface coal mine in southwest China

Deep Underground Science and Engineering, EarlyView.
An experimental device for physical simulation of hydraulic fracturing, comprising: a load‐bearing mechanism with multiple interconnected plates that collectively form an sample chamber; a load‐generating mechanisms, with multiple load‐generating mechanisms arranged within the experimental chamber.
Delei Shang, Farui Shi, Jun Lu, Minghui Li, Cunbao Li, Heping Xie   +5 more
wiley   +1 more source

Gypsum lakes, sandflats and soils revealed from the Triassic Red Peak Formation of the Chugwater Group, north‐central Wyoming

The Depositional Record
Bedded gypsum is relatively common in bedded evaporites associated with red bed siliciclastics of Permo‐Triassic Pangea. However, little attention has been paid to the textures of ancient gypsum, which can be used to refine interpretations of ...
Maya Yamei Bradford, Kathleen C. Benison
doaj   +1 more source

Strength Calculations of Block Elements of Room-and-Pillar Mining under the Permafrost Conditions [PDF]

, 2010
The paper covers results of rheological properties of gypsum under natural conditions of permafrost and stress-and-strain conditions of room’s roof rocks in gypsum quarries depending upon the ceiling thickness.
Busylo, V.I., Saveliev, V.A., Savelieva, T.S.   +2 more
core  

Elucidating the crystal-chemistry of Jbel Rhassoul stevensite (Morocco) by advanced analytical techniques [PDF]

, 2008
The composition of Rhassoul clay is controversial regarding the nature of the puremineral clay fraction which is claimed to be stevensite rather than saponite.
A. Maazouz, B. Rhouta, Barrakad, Benammi, Briant, Brindley, Caillère, Dammour, Duringer, Eberhart, F. Maury, F. Senocq, Faust, Fleischer, Guven, H. Kaddami, Holtzapffel, J. Elbarqy, J.- F. Gerard, Jacobs, Jeannette, Jolivet, L. Daoudi, M. Amjoud, Mackenzie, Millot, Rautureau, Trauth, Wilson   +28 more
core   +3 more sources

Numerical and experimental study on P‐wave propagation across a rock joint with different orientations

Deep Underground Science and Engineering, EarlyView.
Joint orientation significantly affects P‐wave velocity, with the highest velocity at zero‐degree angles, decreasing to 30° as the angle increases. The velocity increases slightly from 30 to 45 degrees but sharply decreases from 45 to 90 degrees. Abstract Determination of the required parameters in different science contexts using the ultrasonic wave ...
Yaghoob Zarei, Mojtaba D. fallahi, Ali Uromeihy, Mohammad R. Nikoodel, Mohammad Fathollahy   +4 more
wiley   +1 more source

Microbial colonization of gypsum: from the fossil record to the present day

Frontiers in Microbiology
Microorganisms inhabiting gypsum have been observed in environments that differ greatly in water availability. Gypsum colonized by microorganisms, including cyanobacteria, eukaryotic algae, and diverse heterotrophic communities, occurs in hot, arid or ...
Jan Jehlička, Aharon Oren, Petr Vítek, Jacek Wierzchos   +3 more
doaj   +1 more source