Results 21 to 30 of about 229,806 (251)

Blank roasting kinetics of illite type vanadium bearing stone coal

open access: yesJournal of Materials Research and Technology, 2020
Vanadium bearing stone coal is an important vanadium resource in China, and roasting is the foundation for extracting vanadium from stone coa1. In this paper, the blank roasting kinetics of illite type vanadium bearing stone coal is studied using the ...
Chengqiang Zhang   +4 more
doaj   +1 more source

Application of Microfillers in Energy-Saving Compressed Gypsum Composites

open access: yesChemical Engineering Transactions, 2022
This paper presents the results of comparative studies of the effect of highly dispersed fillers on the mechanical and structural characteristics of pressed composites based on gypsum.
Victoria Petropavlovskaya   +4 more
doaj   +1 more source

A novel technique to infer ionic charge states of solar energetic particles [PDF]

open access: yes, 2008
In some large solar energetic particle (SEP) events, the intensities of higher energy SEPs decay more rapidly than at lower energies. This energy dependence varies with particle species, as would be expected if the decay timescale depended on a rigidity ...
Cohen, C. M. S.   +7 more
core   +1 more source

Investigation of Asphalt Concrete Macrostructure Parameters

open access: yesНаука и техника, 2005
Investigations have been carried to study influence of crushed stone on the reliability of asphalt concrete. Crushed stone is the main asphalt concrete component that creates its structure.
V. A. Verenko, N. I. Verbilo
doaj   +1 more source

A practical method for preparing Ca(OH)2 nanodispersions for the consolidation of archaeological calcareous stones [PDF]

open access: yes, 2018
Exposure to atmospheric conditions results in considerable deterioration of calcareous building stones, lime mortars and plasters in archaeological monuments, requiring several conservation treatments.
Caner, Evin, Caner-Saltık, E.N.
core   +1 more source

Shear mechanism and shear strength component characteristics of soil-stone mixtures

open access: yesYantu gongcheng xuebao, 2019
In order to study the shear mechanism and shear strength component characteristics of soil-rock mixtures, seven groups of graded soil-stone materials are prepared, covering three typical cases of good gradation, uniform particle size and missing ...
WU Shuai-feng , CAI Hong , WEI Ying-qi , XIAO Jian-zhang , YAN Jun
doaj   +1 more source

Characteristics of the Termination Shock: Insights from Voyager [PDF]

open access: yes, 2005
We examine the energy spectra obtained from the cosmic ray instrument on the Voyager 1 spacecraft during 2002/215 through 2005/60. We find that the energy spectra of protons below ~20 MeV often resemble two power laws with a relatively hard index at low ...
Cummings, A. C., Stone, E. C.
core   +1 more source

Lead Removal from Water Solutions Using Alginate-Immobilized Peach Stone Particles

open access: yes, 2023
This study explores the use of waste biomass from the aquatic plant Myriophyllum spicatum as a biosorbent for removing heavy metals—lead, copper, and cadmium—from aqueous solutions. The biomass was immobilized in alginate beads (Ms:alginate = 2:1) to produce the biosorbent MsA, which was characterized using SEM–EDX and FT-IR analyses.
Lopičić, Zorica   +6 more
openaire   +3 more sources

Study on Soil-Stone Interaction between Strength and Deformation Characteristics of Rock-soil Mixture

open access: yesChemical Engineering Transactions, 2018
In order to explore the effect of different rock content on shear strength and soil-rock mixture, 21 large-scale single-shear tests were conducted using advanced large-scale single shear tester.
Shiping Xu
doaj   +1 more source

The effect of urinary tract calculosis to levels of low molecular inhibitors of crystallization in the urine [PDF]

open access: yesSrpski Arhiv za Celokupno Lekarstvo, 2006
The incidence of urinary tract calculosis continuously progresses. The triggering event in the process of stone formation is decreased urinary level of crystallizing inhibitors.
Milenković Dragica, Lalić Nataša
doaj   +1 more source

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