Results 71 to 80 of about 5,893 (200)

Solubility data and solubility parameters of barnidipine in different pure solvents

open access: yesArs Pharmaceutica, 2023
Introduction: Solubility studies and obtaining physicochemical data on drugs in pure solvents belonging to different chemical classes are key to developing new drug formulations.
Mª Ángeles Peña-Fernández   +3 more
doaj   +1 more source

Toward Specification-Guided Active Mars Exploration for Cooperative Robot Teams [PDF]

open access: yes, 2018
As a step towards achieving autonomy in space exploration missions, we consider a cooperative robotics system consisting of a copter and a rover. The goal of the copter is to explore an unknown environment so as to maximize knowledge about a science ...
Agha-Mohammadi, Ali-Akbar   +7 more
core  

Chromospheric Evaporation in an X1.0 Flare on 2014 March 29 Observed with IRIS and EIS

open access: yes, 2015
Chromospheric evaporation refers to dynamic mass motions in flare loops as a result of rapid energy deposition in the chromosphere. These have been observed as blueshifts in X-ray and extreme-ultraviolet (EUV) spectral lines corresponding to upward ...
Cheng, J. X.   +3 more
core   +1 more source

LSER in the reaction between p-nitrobenzyl bromide and 2-mercaptobenzoxazole

open access: yesJournal of Chemical Research, 2006
The reaction between p-nitrobenzyl bromide and 2-mercaptobenzoxazole has been studied by following the conductance of the reaction mixture at different time intervals. The reaction is overall second order, being first order with respect to both [nucleophile] and [substrate].
Sudala Ranga Reddy   +2 more
openaire   +1 more source

The Evolution of Sunspot Magnetic Fields Associated with a Solar Flare

open access: yes, 2011
Solar flares occur due to the sudden release of energy stored in active-region magnetic fields. To date, the pre-cursors to flaring are still not fully understood, although there is evidence that flaring is related to changes in the topology or ...
A. Canou   +53 more
core   +1 more source

Estimation of width and inclination of a filament sheet using He II 304 A observations by STEREO/EUVI [PDF]

open access: yes, 2010
The STEREO mission has been providing stereoscopic view of the filament eruptions in EUV wavelengths. The most extended view during filament eruptions is seen in He II 304 \AA observations, as the filament spine appears darker and sharper.
Gosain, S., Schmieder, B.
core   +6 more sources

Correlation study of retention data and antimalarial activity of 1,2,4,5-mixed tetraoxanes with their molecular structure descriptors and LSER parameters [PDF]

open access: yesJournal of Pharmaceutical and Biomedical Analysis, 2014
The chromatographic behavior of mixed 1,2,4,5-tetraoxanes, cholic and deoxycholic acid derivatives with distinct biological activity, was examined by high-performance thin-layer chromatography in order to correlate their structure and retention. Chromatographic systems were consisted of RP-18 or CN-silica as stationary phase, and binary mixtures of ...
Šegan, Sandra   +5 more
openaire   +5 more sources

Linear Solvation Energy Relationship (Lser) in the Allylation of 2-Mercapto-1-Methylimidazole

open access: yesProgress in Reaction Kinetics and Mechanism, 2009
The affect of 16 different protic and aprotic solvents on the rate of reaction between allyl bromide and 2-mercapto-1-methylimidazole has been studied. Correlation of the rate constants with different solvent parameters indicates that the polarity, polarisability, electrophilicity and hydrogen bond donor ability of the solvent simultaneously influence
Dharanipragada Vijayabharathi   +1 more
openaire   +1 more source

Estimating the growth effects of services sector: A cointegration analysis for Pakistan [PDF]

open access: yes, 2016
This article empirically tests the hypothesis of Pugno (Struct Change Econ Dyn 17:99-115, 2006) that both business- and household-related services contribute in the economic growth of the country in the case of Pakistan over the period of 1960-2014.
Jalil, Abdul   +2 more
core   +2 more sources

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