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Now showing items 6631-6637 of 6637
Recent advances in synthesis of functionalized β-lactams through cyclization of N-propargyl amine/amide derivatives
(
Bentham Science Publishers B.V.
, 2018 , Other)
β-lactams have attracted a significant attention due to their potential biological activities and wide variety of synthetic applications. Developing novel and efficient methods for construction of functionalized β-lactams ...
Microstructural investigation of gamma-irradiated ultra high molecular weight polyethylene in nitrogen atmosphere
(
Trans Tech Publications
, 2010 , Conference Paper)
In this paper the results of structural changes in ultra high molecular polyethylene (UHMWPE) upon gamma irradiation and storage in nitrogen environment are reported. Based on differential scanning calorimetry (DSC), wide ...
Effect of gamma irradiation on the microstructure and morphology of polyethylene oxide and polyvinyl alcohol blends
(
Trans Tech Publications
, 2010 , Conference Paper)
Thin films of a blend of 90, 75, 50 (wt/wt%) percentage of polyethylene oxide and polyvinyl alcohol were synthesized and irradiated with 5, 25, 50, 100 and 200 kGy. The presence of PVA leads to diffusion controlled mechanism ...
Pottery from Halat Aobeer and Hazem Al-Jasrah, Qatar
(
Elsevier
, 2013 , Article)
In this paper the results of investigations on six archaeological ceramic sherds of the most common Islamic earthenware from the site of Halat Aobeer and Hazam Al-Jasrah are presented. The data was obtained by using a ...
Determination of midodrine hydrochloride via Hantzsch condensation reaction: A factorial design based spectrophotometric approach
(
Royal Society of Chemistry
, 2015 , Article)
A set of experimental designs was executed to attain the optimal reaction parameters of chemical derivatization of midodrine hydrochloride (MD·HCl) in oral formulas via a Hantzsch condensation reaction. The process variables, ...
n-InAs based photo-thermo-electrochemical cells for conversion of solar to electrical energy
(
Elsevier
, 2016 , Article)
This paper presents the photo-thermo-electrochemical (PEC) response of various combinations of the n-type indium arsenide (n-InAs) photo-electrode with different counter electrodes, i.e., Ag, Al, Cu, Pb, Zn and ITO. The ...
Date palm status and perspective in qatar
(
Springer Netherlands
, 2015 , Article)
Qatar ranks as the 16 largest date-producing country in the world. There are 581,336 date palm trees growing in an area of 2,469 ha with date production of 21,491 mt as of 2010. It is the major fruit tree grown in the ...