Results 21 to 30 of about 186,870 (267)

Study on Calculation Method of Heat Exchange Capacity and Thermal Properties of Buried Pipes in the Fractured Rock Mass-Taking a Project in Carbonate Rock Area as an Example

Energies, 2023
Fractures are developed in carbonate rock areas, and the fracture water flow significantly influences the heat exchange between buried pipes and the rock mass by induing heat convection, providing the carbonate rock area a strong heat exchange capacity ...
Lin Wang, Yonglin Ren, Fengqiang Deng, Yiqiang Zhang, Yan Qiu   +4 more
doaj   +1 more source

Elements in the Hair of Non-Mining Workers of a Lignite Open Mine in Neyveli

INDUSTRIAL HEALTH, 2003
Trace elements are analyzed in the human scalp hair to assess the extent of body burden of pollution. The levels of seven elements (Cd, Cr, Cu, Mn, Ni, Pb and Zn) were determined in the hair of fishermen from Pondicherry, students and businessmen from Madras and non-mining workers from Neyveli lignite open mine.
SUKUMAR, Athimoolam, SUBRAMANIAN, Ramachandran   +1 more
openaire   +3 more sources

Microstructure and Mechanical Properties of Novel Heat Resistant Cast Al-Cu-Yb(Gd)-Mg-Mn-Zr Alloys

Metals, 2022
The present study focused on the development of the novel heat resistant cast Al-Cu-Yb(Gd)-Mg-Mn-Zr alloys based on the prevue investigations. Microstructures and mechanical properties were investigated by optical, scanning and transmission electron ...
Olga I. Mamzurina, Sayed M. Amer, Maria V. Glavatskikh, Ruslan Yu. Barkov, Irina S. Loginova, Andrey V. Pozdniakov   +5 more
doaj   +1 more source

Airway responsiveness and job selection: a study in coal miners and non-mining controls. [PDF]

Occupational and Environmental Medicine, 1995
BACKGROUND--It has been suggested that health related job selection is a major cause of the healthy worker effect, and may result in inaccurate estimates of health risks of exposures in the working environment. Improved understanding of self selection, including the role of airway hyperresponsiveness, should improve accuracy in estimating occupational ...
E L, Petsonk, E M, Daniloff, D M, Mannino, M L, Wang, S R, Short, G R, Wagner   +5 more
openaire   +2 more sources

Il diritto di Text and Data Mining (TDM) non esiste

Rivista Italiana di Informatica e Diritto, 2023
L’a. analizza le disposizioni della direttiva copyright nel mercato unico digitale (direttiva (UE) 2019/790: CDSMD) relative alla c.d. eccezione di Text and Data Mining al fine di stabilire se per consentire le attività tecniche implicate dalle ...
Salvatore Orlando
doaj   +1 more source

Potential Use of Methane Gas from Municipal Waste Storage Facilities: A Case Study of the Karaganda Region

Energies
This article presents an environmental assessment of emissions from a solid waste landfill in the Karaganda Region of the Republic of Kazakhstan in order to study the dynamics of methane release and determine its energy potential.
Ravil Mussin, Denis Akhmatnurov, Nail Zamaliyev, Yelena Tseshkovskaya, Natalya Tsoy, Alexandr Zakharov, Vadim Tseshkovskiy, Nikita Ganyukov, Krzysztof Skrzypkowski, Krzysztof Zagórski, Anna Zagórska   +10 more
doaj   +1 more source

Distribution of Some Ecotoxic Elements in Fuel and Solid Combustion Residues in Poland

Energies, 2020
The purpose of this paper is to assess the content and distribution of some elements in coal from two bituminous coal basins and in fly ash and slag derived from combustion of the coals in six power plants in Poland.
Henryk R. Parzentny, Leokadia Róg
doaj   +1 more source

Enhanced Coal Fly Ash Desilication Using Atmospheric NaOH Leaching with Simultaneous Magnetic Separation

Metals, 2023
Coal fly ash (CFA) is a technogenic waste formed during coal combustion in thermal power plants (TPPs). The extraction of valuable components from CFA is complicated by the presence of a large amount of amorphous glassy mass and iron.
Andrei Shoppert, Dmitry Valeev, Irina Loginova, Leonid Chaikin, Jinhe Pan   +4 more
doaj   +1 more source

Recent Advances for Phase Transformation and Reconstruction of Gold-bearing Inclusions during the Pre-oxidation of Refractory Gold Ores

Kuangchan zonghe liyong
This is an article in the field of mining engineering. Under the background of "double carbon" and "ballast stone" of refractory gold ore resources, pre-oxidation is an effective pretreatment method for efficient gold extraction from refractory gold ores.
Tiantian WU, Zhihui SHEN, Jianlong WANG, Guixu HE, Yueqin QIU   +4 more
doaj   +1 more source

Geology and geochemistry of Zn-Pb(-Ge-Ag) deposits in the Sichuan-Yunnan-Guizhou Triangle area, China: A review and a new type

Frontiers in Earth Science, 2023
Mississippi Valley Type (MVT)1 deposits represent the majority of carbonate-hosted Zn–Pb deposits globally. They typically form in an extensional tectonic setting along passive margins.
Han Runsheng, Zhang Yan, Qiu Wenlong, Ding Tianzhu, Wang Mingzhi, Wang Feng   +5 more
doaj   +1 more source