Results 71 to 80 of about 60,065 (235)
Adsorption of Heavy Metals Lead and Cadmium in Soil by Modified Lignite
Kuangchan zonghe liyongIn this paper, the adsorption and resolution mechanism of heavy metals Pb2+ and Cd2+ by modified lignite were studied. Methods: Four single-factor gradient variables (pH value, amount of lignite, adsorption time, adsorption temperature) were designed to ...
Haiyan CHU +4 more
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Effects of lignite-based sulphur fertilizer levels on soil properties and growth of Brassica napus [PDF]
Emirates Journal of Food and AgricultureLignite and sulphur are instrumental in enhancing the growth and yield-related traits of Brassica napus, commonly known as rapeseed. This study aimed to explore the effects of lignite-based sulphur fertilizers on Brassica napus production.
Azmat Ali Nosher +9 more
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Effect of hydrothermal treatment on the carbon structure of Inner Mongolia lignite
International Journal of Coal Science & Technology, 2020 Understanding the structural properties of lignite during hydrothermal treatment would aid in predicting the subsequent behavior of coal during the pyrolysis, liquefaction, and gasification processes.
Peng Liu, Dexiang Zhang
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The Surprising Bias of PPML Estimates of Structural Gravity Models With Two‐Way Fixed Effects
Review of International Economics, EarlyView.ABSTRACT The previous literature has shown that the Poisson Pseudo‐Maximum Likelihood (PPML) estimator provides consistent and asymptotically unbiased estimates of the parameters of structural gravity models with two‐way fixed effects, although their standard errors need correction.
Ben Shepherd, Tom Zylkin
wiley +1 more source
Study of Hydrophobic Domains in Humic Acids [PDF]
, 2008 Fyzikálně-chemická povaha hydrofobních domén huminových kyselin byla studována z několika hledisek. K objasnění významu fluorescenčních spekter byly vzorky podrobeny sekvenční frakcionaci, která pomohla k částečnému objasnění vlivu vodorozpustných složek,
Čechlovská, Hana
core
International Journal of Coal Science & Technology, 2017 The present paper entails the results of the investigations carried out on the lignite deposits of Kachchh Basin. The lignite samples were drawn from five lignite seams from Panandhro lignite field (Seam-I to -V) and eight lignite seams (Seam-I to -VIII)
Prakash K. Singh +3 more
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Agrosystems, Geosciences &Environment, Volume 9, Issue 2, June 2026.Abstract Commercial row crop production in the midsouthern United States is characterized by extensive application of inorganic soil inputs and management practices that contribute to degraded soil health. This study was conducted to determine if cover crops affect spatial or temporal changes in soil chemical properties in a raised, stale seedbed ...
G. Dave Spencer +6 more
wiley +1 more source
Lignite price and split of profit negotiation in bilateral monopoly of lignite opencast mine and power plant [PDF]
The newest outcome of bilateral monopoly (BM) of lignite opencast mine & power plant analysis have been discussed. The determinism of optimal solution maximising joint profits not only in quantity of lignite - the size and shape of the ultimate pit ...
Jurdziak, Leszek
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Natural radioactivity in lignites and lignite ash: Final report [PDF]
, 1987 Natural radioactivity in a Texas lignite field and in leachates from lignite ash from power plants was measured. The radioactivity concentrations found (4 ppM uranium in the lignite, 16 ppM uranium in the lignite ash, and a few picocuries of natural radionuclides per liter in the leachates) do not differ appreciably from those found previously in ...
Greiner, N. R., Wagner, P.
openaire +2 more sources
The South Moravian Lignite Coalfield and method of its digital modeling [PDF]
Acta Montanistica Slovaca, 2007 The contribution methodical procedures of modeling and assessing the deposits in the South Moravian Lignite Coalfield, applied in the frame of solution of the Grant Agency of the Czech Republic project No. 105/06/1264, are presented.
Kerstin Hoňková +2 more
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