Serum enzymes (aspartate transaminase, alanine transaminase, alkaline phosphatase (ALP), gamma-glutamyltransferase, and creatine kinase (CK] were measured in 296 young persons who admitted to recent inhalation of solvents, usually toluene based glues. In general, results fell within expected adult reference ranges except for ALP and CK. About 60% of subjects had CK activities above the upper re...

Biological indicators of exposure to solvents are often characterised by a high variability that may be due either to fluctuations in exposure or individual differences in the workers. To describe and understand this variability better a physiological model for differing workers under variable industrial environments has been developed. Standard statistical distributions are used to simulate va...

Deep eutectic solvents (DESs) are novel solvent media that are currently under investigation as an alternative to ionic liquids and conventional solvents. The physical properties of DESs as well as their mild environmental footprint and potentially critical industrial application necessitate understanding the interaction of functional groups on both the salt and hydrogen bond donor (HBD). In th...

Earlier work with a fluorescent aid indicated that flocculent brewer's yeast may have more surface lipids than nonflocculent types. Organic solvents were checked against flocculent Gilliland yeasts. It was found that those reagents which affect "free" lipids had no dispersive action, and those which remove "bound" fats had a powerful dispersive action against such yeasts. There was no indicatio...

Analysis of a polymer by the LC technique of GPC/SEC reveals information that influences many of the key physical parameters of such material, including strength, brittleness, melt flow, and how easily the material is processed. As such, GPC/SEC is a very important technique for those synthesizing polymers of all kinds. However, for many polymer systems, the choice of solvent for the analysis i...

Inherited the advantages of inorganic salts and organic solvents, ionic liquids (ILs) exhibit many superior properties allowing them promising green solvents for the future. Although it has been widely acknowledged that the unique features of ILs originate from their dual ionic and organic nature, its microscopic physical origin still remains blurry. In this work, by comparing the ion/molecule ...

Chiral ionic solvents were almost unexplored before the last five years. This field which is of increasing importance could constitute a renewal for the chemistry of chiral solvents. So far reported examples are designed either from the chiral pool (aminoacids, hydroxyacids, amines, aminoalcohols, terpenes and alkaloids) or by asymmetric synthesis; they can bear central, axial or planar chirali...

This presentation discusses the use of an interval analysis based global optimization approach for the systematic design of cleaning solvent blends (commonly referred to as blanket washes) for lithographic printing. The simultaneous consideration of associated process constraints, property requirements, and environmental restrictions makes the blanket wash design a rather difficult problem. To ...

The effect of solvent composition on the conductivity behaviour sodium bromide (NaBr) and chloride (NaCl) salts in binary mixed aqueous organic solvents was evaluated using measurement. specific conductivities methanol-water, ethylene glycol-water glycol-methanol mixtures were determined at different compositions (0, 0.1, 0.4, 0.7 1) concentrations (0.01, 0.02, 0.03, 0.04 0.05 M) with JENWAY 45...

There are six tocol analogs present in palm oil, namely α-tocopherol (α-T), α-tocomonoenol (α-T₁), α-tocotrienol (α-T₃), γ-tocotrienol (γ-T₃), β-tocotrioenol (β-T₃) and δ-tocotrienol (δ-T₃). These analogs were difficult to separate chromatographically due to their similar structures, physical and chemical properties. This paper reports on the effect of pressure and injection solvent on the sepa...