My supervisor introduced me to the field of surface and colloid chemistry in 1997, while studying physical chemistry as an undergraduate student at the University of Bergen. Little did I then know that the work would lead me into the petroleum industry, and a struggle with "the good and the bad asphaltenes". As an experimentalist, the work in the laboratory has, more often than not, provided re...

The production of compounds via enzymatic esterification has great scientific and technological interest due to the several inconveniences related to acid catalysis, mainly by these systems do not fit to the concept of "green chemistry". Besides, natural products as clove oil present compounds with excellent biological potential. Bioactives compounds are often toxic at high doses. The evaluatio...

Glycerol is one of the major residues obtained during biodiesel transesterification. Microfibrillated cellulose was from empty bunches palm oil, which a residue biomass extracted oil. Therefore, objective this work to apply two important oil chemistry industry, glycerol and lignocellulose biomass, in addition acrylic acid synthesize polymer matrix form hydrogel for water absorption applications...

UV–vis absorption spectroscopy is one of the most accessible spectroscopic techniques at high school educational level, and it usually introduced in analytical chemistry courses due to its versatility wide range applications many fields chemistry. Within this framework, we have developed an easy-to-use “simulation tool” identify quantify main pigments a relatively complex food matrix, such as o...

Hypericum perforatum L. (Hypericaceae), or St. John's Wort, is a well-known medicinal herb often associated with the treatment of anxiety and depression. Additionally, an oil macerate (Oleum Hyperici) of its flowering aerial parts is widely used in traditional medicine across the Balkans as a topical wound and ulcer salve. Other studies have shown that Oleum Hyperici reduces both wound size and...

In a 9-week study seventy-six healthy adult volunteers with an average age of 44 (SD 11) years, with baseline plasma total cholesterol levels below 8 mmol/l, received in a balanced, double-blind, crossover design, a total of three different table spreads for personal use. Two spreads were fortified either with free (non-esterified) vegetable-oil sterols, mainly from soyabean oil (31 g sterol eq...

Injection of alkaline solutions in reservoir leads to mineral dissolution and precipitation, possibly resulting in changes in permeability and porosity, and consequently altering solution pH. Accurate prediction of pH, alkali consumption and aqueous chemistry changes are required to design suitable chemical blends in alkaline-polymer (AP) or alkaline-surfactant-polymer (ASP) flooding. Excessive...

A field-scale experiment with a complete randomized block design was performed to study the degradation of buried oil on a shoreline over a period of almost 1 year. The following four treatments were examined in three replicate blocks: two levels of fertilizer treatment of oil-treated plots, one receiving a weekly application of liquid fertilizer and the other treated with a slow-release fertil...

The purpose of this research was to analyze effect the balancing lemuru fish oil and palm on carcass broiler chemical composition breast broiler. 200 broilers reared from DOC 35 days old. Broilers were divided into 4 treatment groups 5 replications. consisted of: P0 = diet with 3% crude oil, P1 1% + 2% P2 P3 oil. Data analyzed using ANOVA Duncan's significant difference test. Treatment up had (...

Contaminant hydrology is the study of processes that affect both ground and surface water pollution. It draws on the principles of hydrology and chemistry. Contaminant hydrology and water quality research seeks to understand the role of soil properties and hydrologic processes on ground and surface water pollution and develop strategies to mitigate their impacts. Research is done at all scales ...