Results 141 to 150 of about 1,510,051 (362)
Assessment of mining activities with respect to the environmental protection [PDF]
, 2017 This paper deals with the impact of mining on the environment. Coal mining is still among the most widespread and most intense mining activity, which disturbs the landscape around us bringing regional environmental, economic and aesthetic problems ...
Dirner, Vojtech +3 more
core
International Forum of Allergy &Rhinology, EarlyView.ABSTRACT Background To determine the safety and efficacy of laser ablation of the posterior nasal nerve (PNN) for the treatment of chronic rhinitis. Methods This study was a single‐center, prospective, single‐blinded, randomized sham‐controlled trial. Patients with a 24‐h reflective Total Nasal Symptom Score (rTNSS) ≧ 5, rhinorrhea ≧ 2, and congestion ≧
Jyun‐Yi Liao +9 more
wiley +1 more source
Coal petrography and thermal maturity of organic matter in sedimentary rocks of the Archipelago New Siberian Islands [PDF]
Нефтегазовая геология: Теория и практикаThe article presents the results of studying sedimentary rock samples from outcrops of the Archipelago New Siberian Islands using coal petrography methods.
Sobolev P.O.
doaj
Too Little Oil, Too Much Coal: Optimal Carbon Tax and when to Phase in Oil, Coal and Renewables [PDF]
Our main message is that it is optimal to use less coal and more oil once one takes account of coal being a backstop which emits much more CO2 than oil. The way of achieving this is to have a steeply rising carbon tax during the initial oil-only phase, a
Cees A. Withagen +1 more
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Current state-of-the-art in drying low-rank coals [PDF]
, 1976 Preparing Alaska's coal for marketing -- Drying low-rank coals -- Effect of lignite source -- Acknowledgement -- References.Research on drying of low-rank coals, such as lignites and subbituminous coals, has been conducted for nearly half a century ...
Rao, P.D. and Wolff, E.N.
core
Angewandte Chemie, EarlyView.HEO‐regulated electronic structure drives nonradical PI activation, promoting ETP‐mediated polymerization of 4CP into high‐molecular‐weight products with enhanced surface enrichment. Concurrent dechlorination occurs via radical coupling and •OHads attack, enabling efficient carbon retention and selective product evolution at the liquid–solid interface.
Ziwei Yao +8 more
wiley +1 more source
The Chicago Creek and Norton Sound area, coal exploration programs, 1982 [PDF]
, 1986 K. H. Manning, D. L. Stevens
openalex +1 more source
Karakteristik Briket Biocoal Dengan Penambahan Sekam Padi Dan Wax [PDF]
, 2011 Biocoal made by mixing Sub-Bituminous Tanjung Enim coal with rice skin biomass to make biocoal briquette that will have calorific value suitable for domestic consumption and also have a quicker initial burning time that has been a problem in applying ...
Dewi, R. M. (Retno) +2 more
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Gravity flow rate of solids through orifices and pipes [PDF]
, 1977 Lock-hopper systems are the most common means for feeding solids to and from coal conversion reactor vessels. The rate at which crushed solids flow by gravity through the vertical pipes and valves in lock-hopper systems affects the size of pipes and ...
Gardner, J. F. +2 more
core +1 more source