Results 11 to 20 of about 13,832,325 (289)

Effect of Extraction Solvent/Technique on the Antioxidant Activity of Selected Medicinal Plant Extracts

open access: yesMolecules, 2009
Theeffects of four extracting solvents [absolute ethanol, absolute methanol, aqueous ethanol (ethanol: water, 80:20 v/v) and aqueous methanol (methanol: water, 80:20 v/v)] and two extraction techniques (shaking and reflux) on the antioxidant activity of ...
Bushra Sultana   +2 more
doaj   +1 more source

How Does the Development of the Internet Affect Green Total Factor Productivity? Evidence From China

open access: yesIEEE Access, 2020
Green total factor productivity is not merely an inevitable choice to continuously increase the quality of China’s economy, but also a booming demand to promote global development.
Tuochen Li   +3 more
doaj   +1 more source

THE EFFECTS OF TOTAL DARKNESS ON SCHEDULE CONTROL [PDF]

open access: yesJournal of the Experimental Analysis of Behavior, 1974
The study investigated the effect of total darkness on the key pecking of pigeons under fixed‐ratio, variable‐ratio, fixed‐interval, and variable‐interval schedules of food reinforcement. Eight pigeons were divided into groups of two, with each group conditioned to peck under one of the four schedules of reinforcement.
P W, Robinson, M F, Shelley
openaire   +2 more sources

Effects of Xenobiotics on Total Antioxidant Capacity [PDF]

open access: yesInterdisciplinary Toxicology, 2012
ABSTRACT The objective of this article was to review the effects of xenobiotics on total antioxidant capacity (TAC). Measurement of TAC is appropriate for evaluation of the total antioxidant defenses of blood, cells, and different kinds of tissues and organs.
openaire   +2 more sources

Friction in metal-on-metal total disc arthroplasty: effect of ball radius [PDF]

open access: yes, 2012
Total Disc Arthroplasty (TDA) can be used to replace a degenerated intervertebral disc in the spine. There are different designs of prosthetic discs, but one of the most common is a ball-and-socket combination.
Hukins, DWL   +3 more
core   +1 more source

Absolute total-effectiveness of a total effective (𝑁,𝑝_{𝑛}) method [PDF]

open access: yesProceedings of the American Mathematical Society, 1982
In the present paper we investigate absolute total effectiveness of a ( N , p n ) (N,{p_n}) method. It is established that a method known to be total effective is also absolute total effective.
openaire   +1 more source

Analysis on the Influence of Current Ratio, Debt to Equity Ratio and Total Asset Turnover Toward Return on Assets on the Otomotive and Component Company That Has Been Registered in Indonesia Stock Exchange Within 2011-2017 [PDF]

open access: yes, 2020
A good company can be seen from the level of return on assets invested, and it affects the interest of an investor to invest in. But the high or low level of profit can be influenced by the financial performance of one of the financial performance is the
Irman, M. (Mimelientesa)   +1 more
core   +2 more sources

On the level-slope-curvature effect in yield curves and eventual total positivity [PDF]

open access: yes, 2015
Principal components analysis has become widely used in a variety of fields. In finance and, more specifically, in the theory of interest rate derivative modeling, its use has been pioneered by Litterman and Scheinkman [J. Fixed Income, 1 (1991), pp. 54--
Forzani, Liliana Maria   +1 more
core   +1 more source

Estimating the natural indirect effect and the mediation proportion via the product method

open access: yesBMC Medical Research Methodology, 2021
Background The natural indirect effect (NIE) and mediation proportion (MP) are two measures of primary interest in mediation analysis. The standard approach for mediation analysis is through the product method, which involves a model for the outcome ...
Chao Cheng, Donna Spiegelman, Fan Li
doaj   +1 more source

Simulation of Shielding Effects on the Total Dose Observed in TDE of KISAT-1 [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2001
The threshold voltage shift observed in TDE (Total Dose Experiment) on board the KITSAT-1 is converted into dose (rad(SiO2)) usinsg the result of laboratory calibration with Co-60 gamma ray source in KAERI (Korea Atomic Energy Research Institute ...
Sung-Joon Kim   +2 more
doaj  

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