Results 21 to 30 of about 7,134,183 (281)

Diagnostic Accuracy of Urine Protein/Creatinine Ratio Is Influenced by Urine Concentration. [PDF]

PLoS ONE, 2015
The usage of urine protein/creatinine ratio to estimate daily urine protein excretion is prevalent, but relatively little attention has been paid to the influence of urine concentration and its impact on test accuracy.
Chih-Yu Yang, Fu-An Chen, Chun-Fan Chen, Wen-Sheng Liu, Chia-Jen Shih, Shuo-Ming Ou, Wu-Chang Yang, Chih-Ching Lin, An-Hang Yang   +8 more
doaj   +1 more source

Influence of the pulse wave in the stratification of high density particles in a JIG device

TecnoLógicas, 2016
A study of particle motion subjected to four different pulsation profiles on a pulsated fluidized bed jig concentrator was carried out. The profiles used in the simulation were – sinusoidal, triangle, sawtooth-backward and sawtooth-forward.
Manuel A. Ospina-Alarcón, Arturo B. Barientos-Ríos, Moisés O. Bustamante-Rua   +2 more
doaj   +1 more source

The method of processing technogenic tailings of chromium [PDF]

Journal of Mining and Metallurgy. Section A: Mining, 2020
Taking into account the existing demand for chromium concentrates, the extraction of chromium from technogenic formations of sludge storages of the tailings of chromium ore beneficiation is an important practical task.
Dyussenova S., Kenzhaliyev B., Abdulvaliyev R., Gladyshev S.   +3 more
doaj  

The Use of Process Analysis and Simulation to Identify Paths to Improve the Operation of an Iron Ore Gravity Concentration Circuit

Advances in Chemical Engineering and Science, 2020
The processing of iron ore to recover the valuable iron oxide minerals is commonly carried out using spiral concentrators that separate valuable minerals from non-valuable ones on the basis of the specific gravity of minerals.
M. Sadeghi, C. Bazin
semanticscholar   +1 more source

Response of Ozone to a Gravity Wave Process in the UTLS Region Over the Tibetan Plateau

Frontiers in Earth Science, 2020
In this paper, ERA5 reanalysis data from the European Center for Medium-Range Weather Forecasts and the Weather Research and Forecasting (WRF) mesoscale model are used to compare and simulate a topographic gravity wave event that occurred over the ...
Shujie Chang, Shujie Chang, Zheng Sheng, Yanwei Zhu, Weilai Shi, Zhixian Luo   +5 more
doaj   +1 more source

Investigation of pre-concentration of the Lece ore using dense medium gravity concentration [PDF]

Podzemni Radovi
The pre-concentration of Pb-Zn ores is commonly performed using gravity concentration in a dense medium. The primary objective of this process is to remove coarse-grained gangue from fully crushed ore using a cost-effective method, while keeping the loss
Todić Slavko, Lazić Predrag, Gavrilović Tamara   +2 more
doaj   +1 more source

Process optimization of a chrome ore gravity concentration plant for sustainable development

, 2020
India has limited resources of chromite. To optimally exploit this valuable and strategic raw material, numerous chrome ore beneficiation plants have been established. Most of these plants suffer chromite losses into the tailing.
Y. R. Murthy, S. K. Tripathy
semanticscholar   +1 more source

A general framework to test gravity using galaxy clusters II: A universal model for the halo concentration in f(R) gravity [PDF]

Monthly notices of the Royal Astronomical Society, 2019
We present a novel fitting formula for the halo concentration enhancement in chameleon f(R) gravity relative to General Relativity (GR). The formula is derived by employing a large set of N-body simulations of the Hu-Sawicki f(R) model which cover a wide
Myles A Mitchell, C. Arnold, Jian-hua He, Baojiu Li   +3 more
semanticscholar   +1 more source

Concentric cone antihydrogen gravity experiment [PDF]

AIP Conference Proceedings, 2019
An antihydrogen gravity experiment is proposed that could be conducted at the CERN Antiproton Decelerator facility to determine the directionality of the acceleration of antihydrogen in earth’s gravitational field. The experiment would consist of an antihydrogen source located in a cylindrical vacuum chamber at the common vertex of an azimuthally ...
Patel, S. S., Sun, S. R., Ordonez, Carlos A.   +2 more
openaire   +2 more sources

Constrained Two-Dimensional Inversion of Gravity Data

Journal of Mathematical and Fundamental Sciences, 2014
The non-uniqueness in the solution of gravity inversion poses a major problem in the interpretation of gravity data. To overcome this ambiguity, “a priori” information is introduced by minimizing a functional that describes the geometrical or physical ...
Hendra Grandis , Darharta Dahrin
doaj   +1 more source