Results 31 to 40 of about 4,997 (224)

Development of X-ray fluorescence technique for the uranium determination in Mongolian coal, coal ash, and phosphate ore [PDF]

open access: yes, 2014
The results of the determination of uranium in Mongolian brown coal, coal ash, phosphate rock, and technological samples by X-ray fluorescence (XRF) spectrometry are presented.
Bolortuya, D.   +3 more
core   +2 more sources

Phosphogenesis in the 2460 and 2728 million-year-old banded iron formations as evidence for biological cycling of phosphate in the early biosphere [PDF]

open access: yes, 2013
The banded iron formation deposited during the first 2 billion years of Earth's history holds the key to understanding the interplay between the geosphere and the early biosphere at large geological timescales.
Chan, LS, Li, Y, Sun, S
core   +1 more source

Valorization of Phosphorus Secondary Raw Materials by Acidithiobacillus ferrooxidans

open access: yesMolecules, 2017
This paper presents the possibility of producing phosphorus fertilizers through Acidithiobacillus ferrooxidans utilization in secondary raw materials solubilization.
Małgorzata Wyciszkiewicz   +3 more
doaj   +1 more source

Utilization process research of the soap industry acid waste water with high carbonate phosphorite of central Kyzylkum [PDF]

open access: yesE3S Web of Conferences, 2021
In the study, the process neutralization acid waster water from soapstock processing by high calcareous phosphorite of Central Kyzylkum at temperature 60 ºC by drainless technology was investigated.
Shamuratov Sanzharbek   +5 more
doaj   +1 more source

Terminal Proterozoic cyanobacterial blooms and phosphogenesis documented by the Doushantuo granular phosphorites II: Microbial diversity and C isotopes [PDF]

open access: yes, 2014
An unprecedented period of phosphogenesis, along with massive deposition of black shales, major perturbations in the global carbon cycle and the rise of atmospheric oxygen, occurred in the terminal Proterozoic in the aftermath of the Marinoan glaciation.
Papineau, D, She, Z-B, Strother, P
core   +1 more source

Occurrence of yttrium in the Zhijin phosphorus deposit in Guizhou Province, China

open access: yesOpen Geosciences, 2022
The Zhijin phosphorite (P)-bearing rare earth element (REE) deposit in Guizhou Province (China) hosts vast ore resources (P: 1.348 billion tonnes; REE: 1.44 Mt).
Chen Jiyan   +3 more
doaj   +1 more source

New observations of Ambient Inclusion Trails (AITs) and pyrite framboids in the Ediacaran Doushantuo Formation, South China [PDF]

open access: yes, 2016
Ambient Inclusion Trails (AITs) are intriguing microtubular structures that commonly occur in association with pyrite in Precambrian organic-rich cherts and phosphorites.
Li, C   +7 more
core   +1 more source

Intensification of technological processes in drilling and blasting operations during open-cut mining in Kyzylkum region [PDF]

open access: yes, 2018
Purpose. It is found that for long term standing, the pit bench profile is close to the boundary of the disturbed zone. Therefore, long stability of the bench can be estimated in respect to the size of the disturbed area and the boundary of residual ...
Karimov, Sh, Ravshanova, M, Zairov, Sh
core   +1 more source

ON THE METHOD OF OBTAINING BORATELIC SUPERPHOSPHATE [PDF]

open access: yesScientific Papers Series : Management, Economic Engineering in Agriculture and Rural Development, 2018
Under laboratory conditions, the effect of the amount of borate salt additive, norm and temperature of EPA on the yield and quality of the product was studied.
Zhanyl DZHANMULDAYEVA   +3 more
doaj  

Ediacara biota flourished in oligotrophic and bacterially dominated marine environments across Baltica. [PDF]

open access: yes, 2018
Middle-to-late Ediacaran (575-541 Ma) marine sedimentary rocks record the first appearance of macroscopic, multicellular body fossils, yet little is known about the environments and food sources that sustained this enigmatic fauna.
Bekker, Andrey   +7 more
core   +3 more sources

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