Comparison of three different methods of determining soil sulphur mineralization in relation to plant sulphur availability in soils

2001 ◽  
Vol 34 (3) ◽  
pp. 131-139 ◽  
Author(s):  
Pamidi J. ◽  
Goh K. ◽  
McLaren R.
2018 ◽  
Vol 120 ◽  
pp. 1-11 ◽  
Author(s):  
Charlotte Vermeiren ◽  
Erik Smolders ◽  
Mike J. McLaughlin ◽  
Fien Degryse

1978 ◽  
Vol 42 (321) ◽  
pp. 111-116 ◽  
Author(s):  
John F. W. Bowles

SummaryThe separation of iron-titanium oxide droplets and the formation of olivine, in the Freetown layered gabbro, depleted the magma in iron and enriched the magma in copper. In magma injections in which the sulphur fugacity was sufficiently high, this resulted in the separation of immiscible copper sulphide droplets closely associated with the iron-titanium oxide droplets, and both were subsequently enclosed by olivine. A lower sulphur fugacity in other injections of magma suppressed the separation of the copper, which later appeared as native copper associated with euhedral titanomagnetite, and was enclosed by feldspar. Crystallization of the iron-titanium oxide droplets and subsolidus diffusion has resulted in granular exsolution of ilmenite from the droplets and lamellar exsolution of ilmenite in the euhedral titanomagnetite.


2006 ◽  
Vol 43 (2) ◽  
pp. 209-214 ◽  
Author(s):  
R. Riffaldi ◽  
A. Saviozzi ◽  
R. Cardelli ◽  
S. Cipolli ◽  
R. Levi-Minzi

2006 ◽  
Vol 24 (6) ◽  
pp. 545-551 ◽  
Author(s):  
Alessandro Saviozzi ◽  
Roberto Cardelli ◽  
Silvia Cipolli ◽  
Renato Levi-Minzi ◽  
Riccardo Riffaldi

Energies ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 4205
Author(s):  
Jacob Rosholm Mortensen ◽  
Alastair James Ward ◽  
Martin Riis Weisbjerg ◽  
Sasha Daniel Hafner ◽  
Henrik Bjarne Møller

In the biogas industry, feedstock plans are used to estimate methane production and nutrient content in the digestate, however, these predictions do not consider the mineralized nitrogen fraction of the feedstock, which is useful when determining the quality of the digestate. In this study, the artificial fiber bag technique, which is commonly used to study feedstock degradation in ruminants, was implemented in anaerobic digestion to quantify mineralization of N and S. The artificial fiber bags were used to enclose substrates but with access to inoculum because of small pores in the bags, thereby enabling digestion. The content of the bags was analyzed before and after digestion to quantify residual mass as well as N and S concentration in the substrate. The method was validated through batch anaerobic digestion of a single substrate with and without bags, where the bags showed little influence on methane production and degradation. Semi-continuous anaerobic digestion experiments showed higher substrate degradation and higher N and S release at thermophilic conditions using four different types of feedstocks and proved useful for solid feedstocks but less so for semi-solid feedstock. For N, most of the mineralization occurred during the first 15 days over a trial of 30 days.


2007 ◽  
Vol 294 (1-2) ◽  
pp. 19-29 ◽  
Author(s):  
Phuy-Chhoy Vong ◽  
Séverine Piutti ◽  
Emile Benizri ◽  
Sophie Slezack-Deschaumes ◽  
Christophe Robin ◽  
...  

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