Results 111 to 120 of about 1,406,898 (336)
Nature, 1904 SOME of your readers will no doubt be interested to see the photograph sent herewith, which represents a peculiar growth of coal on a piece of timber.
openaire +2 more sources
Critical parameters for coarse coal underground slurry haulage systems [PDF]
, 1981 Factors are identified which must be considered in meeting the requirements of a transportation system for conveying, in a pipeline, the coal mined by a continuous mining machine to a storage location neat the mine entrance or to a coal preparation plant
Maynard, D. P.
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Advanced Science, EarlyView.Nanopriming enhances plant resilience to environmental challenges; however, its effectiveness across diverse genetic backgrounds, including genetic modifications and natural variations, remains uncertain. These findings demonstrate that nanopriming improves efficacy when natural genetic variations are considered, particularly in genetically modified ...
Yining Wu +4 more
wiley +1 more source
Study of the Hazard of Endogenous Fires in Coal Mines—A Chemometric Approach
Energies, 2018 The most commonly used practice to assess fire hazard development in underground coal mines is based on the measurement of the concentration of selected gases in the mine’s air.
Karolina Wojtacha-Rychter +1 more
doaj +1 more source
Hybrid Solar Spectral‐Splitting Photovoltaic‐Thermal Hydrogen Production Systems
Advanced Science, Volume 12, Issue 28, July 24, 2025.A hybrid solar photovoltaic‐thermal hydrogen system with membrane‐less electrolysis significantly boosts solar‐to‐hydrogen efficiency by co‐using thermal and electrical energy. The system attains good performance under variable irradiance with direct current power converters.
Yu Tian +4 more
wiley +1 more source
Spectrophotometric determination of phosphorus in coal and coal ash using bismuth-phosphomolybdate complex [PDF]
Journal of the Serbian Chemical Society, 2003 A modified spectrophotometric method using the bismuth phosphomolybdate complex for the determination of phosphorus in coal and coal ash is suggested. Bismuth together with phosphate and molybdate forms a very stable complex in acid medium which turns ...
VESNA M. KALJEVIC +4 more
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The Influence of Temperature on the Expansion of a Hard Coal-Gas System
Energies, 2018 This paper presents experimental results of the sorption-dilatometric kinetics of methane and carbon dioxide on a sample of hard coal from one of the coal mines in the Upper Silesian Coal Basin.
Paweł Baran +4 more
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Coal in Alaska requirements to enhance environmentally sound use in both domestic and Pacific Rim markets [PDF]
, 1990 This document originates from three meetings held in 1989 with the leaders of the Alaskan Coal Industry and coal technologists from the U.S. Department of Energy (DOE)~ Mineral Industry Research Laboratory (MIRL) and Geophysical Institute - University of
Irwin, W. +4 more
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Advanced Science, EarlyView.Combining the bichloride‐based ionic liquid [NEt3Me][Cl(HCl)n] with PdCl2 results in the formation of the highly active, mercury‐free catalyst [NEt3Me]2[PdCl4] for acetylene hydrochlorination to vinyl chloride. Replacing HCl with the bichloride improves the process safety and achieves a competitive turnover frequency of 110 molVCM h−1 molPdCl2−1.
Gesa H. Dreyhsig +9 more
wiley +1 more source
Experience in coal sampling parameters calculation [PDF]
Acta Montanistica Slovaca, 2005 This paper describes the selection of parameters neccessary for the calculation of minimal representative quantity of coal sample for various investigations in the field of mineral processing. The procedure is illustrated on the example case of the Drmno
Rudolf Tomanec, Dejan Milovanovic
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