This study investigated the effect of gilsonite and Styrene-Butadiene-Styrene (SBS) as asphalt binder modifiers on the physical and rheological properties of asphalt binders. For this, binder tests such as penetration test, softening point, rotational viscosity (RV), Dynamic Shear Rheometer (DSR...

With the aim of improving high and low temperature performance, storage stability and compatibility of gilsonite modified asphalt, styrene butadiene rubber (SBR) was selected to achieve a further modification in this research. The effects of SBR on the conventional properties, rheological behavi...

To calculate selected ion monitoring (SIM) gas–liquid chromatography (GLC)–mass spectrometry (MS) results of phospholipid fatty acids (PLFAs) from environmental samples, coefficients were calculated for each fatty acid by dividing the sum of ion intensities in SCAN with that of ions followed i...

The free mycolic acid fraction from Rhodococcus lentifragmentus was derivatized to methyl esters and further fractionated into saturated (F0), monounsaturated (F1) and diunsaturated (F2) species using argentation-TLC. Methyl esters fractions F0, F1 and F2, accounting for approximately 7.4%, 53.1...

Lipid analysis of benthic and floating biofilms from an acid mine drainage (AMD) site in western Indiana revealed the dominance of photosynthetic organisms, mainly Euglena, as indicated by the detection of abundant phytadiene, phytol, phytanol, polyunsaturated n-alkenes, polyunsaturated fatty ac...

The production of wax esters using microbial oils was demonstrated in this study. Microbial oils produced from food waste and by-product streams by three oleaginous yeasts were converted into wax esters via enzymatic catalysis. Palm oil was initially used to evaluate the influence of temperature...

Hydroxy fatty acids (OH-FAs) can be used in the characterization of microbial communities, especially Gram-negative bacteria. We prepared methyl esters of 2- and 3-OH-FAs from the lipid extraction residue of soil, sediment, and biofilm samples without further purification or derivatization of hy...

Biodiesel, an alternative to petroleum oil has gained significant attention from the research community because of its high energy content and good compatibility with existing engine systems. It can be produced from many different sources, such as animals, plants, and microbes. In this study, we...

When fractionating natural and standard lipid mixtures according to the most widely used method for the analysis of soil and other environmental materials, free fatty acids (FFAs) were not recovered quantitatively in the fraction expected to contain all simple lipids. Rather than being eluted fr...

MCM-41 has been hydrothermally synthesized using fumed silica (SiO2) and silatrane [Si(TEA)2] as silica sources. Pd nanoparticles were successfully impregnated to the mesoporous MCM-41 supports. Soybean oil methyl ester was partially hydrogenated by the Pd/MCM-41-SiO2 and Pd/MCM-41-silatrane cat...

Modern high-throughput approaches such as metabolomics, holds promise for investigating microbial communities. This study evaluated the quantitative and qualitative data generation potential of a metabolomics-based approach to characterise the fatty acid methyl esters (FAMEs) of soil microbial c...

Green production of biodiesel via enzymatic transesterification necessitates technological improvements for practical implementation. Heterogenization of biocatalysts has long demonstrated its advantages in biocatalytic processes. In this work, a lipase from Thermomyces lanuginosus (TL) has been...

The German Committee on Indoor Guide Values issues indoor air guide values to protect public health. For health evaluation of glycol ethers and glycol esters in air, the entire group of substances with data for 47 chemicals was analyzed in order to gain a consistent assessment. For some glycol e...

The oxygenated additives propylene glycol methyl ether (PGME), propylene glycol ethyl ether (PGEE), dipropylene glycol methyl ether (DPGME) were studied to determine their influence on both the base diesel fuel properties and the exhaust emissions from a diesel engine (CO, NOx, unburnt hydrocarb...

The effect of glycols viz., ethylene glycol (EG), diethylene glycol (DEG) propylene glycol (PG), dipropylene glycol (DPG) and their monoalkyl ethers on the morphological features of cetyltrimethylammonium tosylate (CTAT) micelle was examined from viscosity and small angle neutron scattering (SAN...

In the framework of the Industrial Fluid Properties Simulation Challenge 2010, liquid–liquid equilibria of dipropylene glycol dimethyl ether and water are determined by molecular dynamics simulation. A new force field for the ether was developed and combined with a water model from the literatu...

The use of read-across of data within a group of structurally similar substances potentially allows one to characterise the hazards of a substance without resorting to additional animal studies. However the use of read-across is not without challenges, particularly when used to address the needs...

Mercury (Hg) is a heavy metal and Hg exposure is associated with various neural, immune, and cardiovascular abnormalities. However, few studies have evaluated Hg’s toxicologic effect on reproductive and metabolic functions. In this study, we assessed whether Hg exposure results in reproductive ...

Unfiltered seawater samples from vertical profiles collected at 60 stations within the California Current during four summer cruises spanning a two-year period from 2014 to 2015, were analyzed for elemental mercury (Hg°), monomethyl mercury (MMHg), dimethyl mercury (DMHg) and total mercury (THg...

The Athabasca Oil Sands Region (AOSR) in Alberta, Canada, is an important source of atmospheric pollutants, such as aerosols, that have repercussions on both the climate and human health. We show that the mean freezing temperature of snow-borne particles from AOSR was elevated (−7.1 ± 1.8 °C),...