Introduction: One crucial discovery by the 2009 NASA Phoenix Lander was the detection of perchlorate at ~1% in the surface Martian regolith [1]. High concentrations of perchlorate may oxidize organics on Mars and be problematic during extraction of organics during future in situ investigations. High temperature pyrolytic extraction methods will likely result in catalytic degradation of organics...

Finding environmentally friendly and cost-effective methods to remediate soils contaminated with polycyclic aromatic hydrocarbons (PAHs) is currently a major concern of researchers. In this study, a series of small-scale semi-continuous extractions--with and without in situ wet oxidation--were performed on soils polluted with PAHs, using subcritical water (i.e. liquid water at high temperatures...

CONTEXT Quercetin (QR) is a natural strong antioxidant of the plant origins. It is used for treating conditions of heart and blood vessels including "hardening of arteries" (atherosclerosis), high cholesterol, heart disease, circulation problems, preventing cancer, for treating chronic infections of the prostate, etc. AIMS The aim of this work was to development and study of an acid-free tech...

Defatted rice bran was treated with subcritical water between 120 and 240°C. The extraction temperature af fected the total carbohydrate and protein contents of the extracts. In the tested temperature range, the total carbohydrate and protein contents were the highest at 180°C and 210°C. The DPPH radical scavenging activity of the extracts increased with increasing extraction temperature up to ...

This paper aims to provide a review of the analytical extraction techniques for polycyclic aromatic hydrocarbons (PAHs) in soils. The extraction technologies described here include Soxhlet extraction, ultrasonic and mechanical agitation, accelerated solvent extraction, supercritical and subcritical fluid extraction, microwave-assisted extraction, solid phase extraction and microextraction, ther...