recently, subcritical water extraction (swe) has been well known as a green technology for extraction of bioactive compounds from plants. in this study, subcritical water extraction, ultrasound assisted extraction (uae) and shaker solvent extraction (sse) were compared for extraction of phenolic compounds from fig (ficuscarica) pulp and skin. antioxidant activity of the extracts was evaluated u...

Dissolved inorganic and organic nitrogen levels are elevated in aquatic systems due to anthropogenic activities. Dissolved organic nitrogen (DON) arises from various sources, and its impact could be more clearly constrained if specific sources were identified and if the molecular-level composition of DON were better understood. In this work, the pharmaceutical carbamazepine was used to identify...

Katuk (Sauropus androgynus) leaves have been traditionally used in Indonesia for increasing human breast milk production. In the previous research, katuk high moisture content, therefore extract were being prepared as spray dried S. androgynus extract. The freeze extracted with ultrasonic assisted extraction method using ethanol 80% a solvent. Then, was drying maltodextrin aid. To improve physi...

An automated solid phase extraction (SPE) protocol to determine carbamazepine in human serum has been developed and validated using a simple, rabid sensitive liquid chromatography-based bio-analytical method. Extraction of was carried out an on-line SPE tool short protein-coated (PC) ODS silica pre-column (PC-ODS-pre-column) phosphate buffer saline (PBS) with pH 7.4 as solvent. There are two di...

Coastal ecologists and managers have frequently used nitrogen stable isotopes (delta15N) to trace and monitor sources of anthropogenic nitrogen (N) in coastal ecosystems. However, the interpretation of delta15N data can often be challenging, as the isotope values fractionate substantially due to preferential retention and uptake by biota. There is a growing body of evidence that carbon isotopes...

Improvements in the yield and solubility of chestnut wood extractives, by using different extraction methods molybdenum catalysts as support, have rarely been reported literature. Many studies focus on parts trees, except for chemical characteristics remaining extractives achieved from thermally modified (THM) (Castanea sativa Mill) wood. This research seeks to better understand effects techniq...

A simple andefficient hollow fiber-based method,viz magnetic solvent bar liquid-phasemicroextraction (MSB-LPME) combined with gas chromatography-flame ionization detection (GCFID)has been successfully developed for the trace determination of mononitrotoluenes (MNTs) innatural water samples. The analytes were extracted from sample solution to the organic solventimmobilize...

Riverine nitrogen distribution is increasingly controlled by anthropogenic activities in their watersheds, regardless of spatial scale, climate, and geographical zone. Consequently, modelling efforts to predict the export of nitrogen from rivers worldwide have used attributes such as population density, land use, urbanization and sanitation. These models have greatly enhanced our understanding ...