Explaining global surface aerosol number concentrations in terms of primary emissions and particle formation [PDF]
, 2010 We synthesised observations of total particle number (CN) concentration from 36 sites around the world. We found that annual mean CN concentrations are typically 300–2000 cm -3 in the marine boundary layer and free troposphere (FT) and 1000–10 000 cm -3 ...
Mihalopoulos, Nikos +117 more
core +2 more sources
Kinetic Study of Esterification of Acetic Acid with n-butanol and isobutanol Catalyzed by Ion Exchange Resin [PDF]
, 2011 Esters are an important pharmaceutical intermediates and very useful perfumery agents. In this study the esterification of acetic acid with n-butanol and iso-butanol over an acidic cation exchange resin, Amberlyst 15 were carried out.
Wanchoo , Ravinder Kumar +7 more
core +2 more sources
An evolutionary approach to modelling concrete degradation due to sulphuric acid attack [PDF]
, 2014 Concrete corrosion due to sulphuric acid attack is known to be one of the main contributory factors for degradation of concrete sewer pipes. This paper proposes to use a novel data mining technique, namely, evolutionary polynomial regression (EPR), to ...
Alani, Amir M. +5 more
core +1 more source
Optimization of direct acid esterification process of soybean oil deodorizer distillate
Grasas y Aceites, 2002 In this research work, the reaction conditions for the direct acid esterification of free fatty acid from soybean oil deodorizer distillate was optimized, using anhydrous ethyl alcohol and concentrated sulfuric acid as catalyst to determine the best ...
Nara Lúcia Facioli +1 more
doaj +1 more source
UPGRADING OF BIO-OIL MOLECULAR DISTILLATION FRACTION WITH SOLID ACID CATALYST [PDF]
BioResources, 2011 Molecular distillation technology has been adopted to obtain a bio-oil fraction rich in carboxylic acids and ketones. This unique bio-oil fraction was then upgraded with a La-promoted solid acid catalyst.
Zuogang Guo +4 more
doaj +2 more sources
High-throughput analysis of total plasma fatty acid composition with direct in situ transesterification. [PDF]
, 2010 Plasma fatty acid (FA) composition reflects dietary intake and endogenous turnover and is associated with health outcomes on a short and long term basis. The total plasma FA pool represents the composition of all FA containing lipid fractions.
Hans Demmelmair +8 more
core +2 more sources
Modeling of a solar receiver–reactor for sulfur-based thermochemical cycles for hydrogen generation [PDF]
, 2011 Sulfur based thermochemical cycles for hydrogen generation from water have one reaction step in common which is the decomposition of sulfuric acid as one of the most energy consuming steps.
Roeb, Martin +3 more
core +1 more source
Use of Anion Exchange Resins for One-Step Processing of Algae from Harvest to Biofuel
Energies, 2012 Some microalgae are particularly attractive as a renewable feedstock for biodiesel production due to their rapid growth, high content of triacylglycerols, and ability to be grown on non-arable land.
Martin Poenie +3 more
doaj +1 more source
The estrogenic activity of phthalate esters in vitro [PDF]
, 1997 A large number of phthalate esters were screened for estrogenic activity using a recombinant yeast screen. a selection of these was also tested for mitogenic effect on estrogen-responsive human breast cancer cells.
P Henttu +7 more
core +1 more source
Methyl ester production from high free fatty acid mixed crude palm oil [PDF]
Songklanakarin Journal of Science and Technology (SJST), 2007 Methyl esters were prepared from mixed crude palm oil containing a high free fatty acid content by using a two-stage process. Sulfuric acid was used as the catalyst in an esterification reaction which was then followed by a transesterification reaction ...
Gumpon Prateepchaikul1 +3 more
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