Terpenoids and steroids constitute the largest known group of plant secondary metabolites. The different groups of terpenes are formed from isoprene (C5) units in enzymatic reactions. Head-to-tail condensation of isoprene units results in the formation of monoterpenes (C10), sesquiterpenes (C15), diterpenes (C20), sesterpenes (C25) and polyterpenes. Tail-to-tail coupling of C15 and C20 units le...

Article history: Received on: 08/08/2016 Revised on: 06/09/2016 Accepted on: 11/10/2016 Available online: 29/11/2016 The present study aimed to determine the proximate composition, mineral content, active ingredients (schisandrin, schisandrin A, gomisin A and gomisin N) and volatile composition of Schinsandra chinensis fruits collected from Inje and Mungyeong, two major cultivating areas in Rep...

Stacking fault energy (SFE) is considered an important parameter to predict the prevalent plastic deformation mechanism in face-centered cubic (fcc) alloys. Experimental methods for determining SFE presuppose that positive. Density functional theory (DFT) a promising tool alloy compositions with low SFEs and desirable mechanical properties. For metastable fcc alloys, DFT predicts negative value...

Excellent work hardening in transformation-induced plasticity (TRIP)-enabled metastable high entropy alloys (HEAs) owe to persistent austenite (γ) martensite (ε) phase transformation; non-basal slip activity and deformation twinning the transformed martensitic are additional mechanisms that contribute selected TRIP HEAs. Mechanical response of HEAs under uniaxial tension is characterized by an ...

Supercritical fluid extraction (SFE) of orotinin, orotinin-5-methyl ether and licoagrochalcone B from Patrinia villosa was performed. The optimization of parameters including pressure, temperature, modifier and sample particle size on yield was carried out using an analytical-scale SFE system. The process was then scaled up by 100 times using a preparative SFE system under the optimized conditi...

The presence of the toxic cyanobacterium Microcystis in the upper San Francisco Estuary (SFE) since 1999 is a potential but to date an unquantified threat to the health and survival of aquatic organisms, such as fish and zooplankton. The microcystins (MCs) predominantly in the LR-form (MC-LR) contained in Microcystis is hepatotoxic and a potential threat to the fishery. This study was conducted...

Preliminary communication The interest in high pressure technology during last decades increased intensively. Supercritical Fluid Extraction (SFE) is a process that is growing in importance as an alternative to conventional separation processes. SFE uses environmentally friendly CO2 as the extracting agent in the process because of its relatively low critical pressure (7,38 MPa), its low critic...

We present aperture synthesis high-resolution (∼ 7×3) observations in CO(J = 1−0) line, HCN(J=1−0) line, and 95 GHz continuum emission toward the central (∼ 1.5 kpc) region of the nearby barred spiral galaxy M 83 with the Nobeyama Millimeter Array. Our high-resolution CO(J = 1−0) mosaic map depicts the presence of molecular ridges along the leading sides of the stellar bar and nuclear twin peak...

Temperature and pressure effects of supercritical carbon dioxide (SCCO2) on the extraction of carotenoids and seed oil from rosehip fruits have been studied. Supercritical fluid extraction (SFE) has shown much potential skills for the isolation of organic compounds from various samples. SFE minimizes sample handling, provides fairly clean extracts, expedites sample preparation and reduces the u...

The research objective was to build a fully-continuous lab-scale supercritical fluid extraction process to remove naphthalene from soil slurries. Both the carbon dioxide and the soil slurry were pumped into an extraction vessel simultaneously and continuously for the duration of an experimental run. Delhi Loamy Sand spiked with approximately 10 000 ppm (wt) of naphthalene and water comprised th...