A novel reversed-phase HPLC method has been developed and validated for the simultaneous determination of 2-phenoxyethanol, methylparaben, ethylparaben and propylparaben preservatives. The method uses a Lichrosorb C8 (150×4.6 mm, 5 µm) column and isocratic elution. The mobile phase consisted of a mixture of acetonitrile, tetrahydrofuran and water (21:13:66, v/v/v), pumped at a flow rate of 1 ml...

To evaluate the potential environmental and health implications of leaching of wood preservatives in service under different conditions, there is a need for a predictive model that provides estimates of the rate and extent of leaching over a wide range of exposure conditions. In this paper, we test the hypothesis that preservative component emissions can be modeled on the basis of three easily ...

The extraction of mechanically separated meat has emerged as an attractive process. However, it increases the incorporation of oxygen and, consequently, of flavors due to rancidity. Thus, preservatives must be added. The objective of this study was to evaluate the shelf life of minced tilapia to replace synthetic preservatives with Hijiki and Nori seaweeds extracts. The application of the extra...

Diazepam (DZP) has become a commonly used drug for treatment of acute repetitive epileptic seizures and febrile convulsions in children. Considering the advantages of rectal administration of DZP, the objective of our study was to formulate and evaluate rectal hydrogels containing DZP as a drug substance in combination with suitable co-solvents and preservatives. Prepared HPMC (hydroxypropyl me...

Nisin is a bacteriocin produced by microbial fermentation of the well-known starter culture for dairy products, Lactococcus lactis. A major challenge in food safety and security prevention emergence unwanted microbes. Artificial preservatives added to prolong shelf life foods may have negative effects on consumer health. An alternative approach use bio-preservatives. However, cost production ni...

Some of the major components of a Howe truss bridge, built from durable Australian hardwoods, were treated with preservatives applied to the surface and inserted into holes bored into the components. The preservatives included two copper naphthenate formulations, two formulations based on 2(thiocyanomethylthio) benzothiazeole (TCMTB), two boron-based products and an oxine-copper formulation. Th...

Chelation efficiency of stimuli-responsive poly(N-iospropylacrylamide-co-methyacrylic acid) (PNIPAAm-MAA) nanoparticles with Cu ions from CuSO4 5H2O solution and from wood treated with copper-based preservatives was studied. It was shown that particle size played a very important role in the adsorption process. The nano-scale particles showed much improved Cu ion adsorption efficiency, compared...

n this project we describe a reversed-phased HPLC method that allows the simultaneous determination of the preservatives benzoic (BA), sorbic (SA) and ascorbic acids (AA) in wine and foodstuffs. The separations were effected by using a C18 varian column and a mobile phase of ammonium acetate buffer (pH 4.4) – methanol (65:35) to elute BA, SA and AA. The flow rate was 1.0 ml/min and the detector...