9 research outputs found
Lipid components and oxidative status of selected specialty oils
Many vegetable oils are marketed as specialty oils
because of their retained flavors, tastes and distinct
characteristics. Specialty oil samples which were commercially produced and retailed were purchased from local superstores
in Reading, UK, and Uppsala, Sweden and profiled for detailed
lipid composition and oxidative status. These oil samples
include: almond, hazelnut, walnut, macadamia nut, argan,
avocado, grape seed, roasted sesame, rice bran, cold
pressed, organic and cold pressed, warm pressed and refined
rapeseed oils. The levels of PV were quite low (0.5-1.3mEq
O2
/kg) but AV and Rancimat values at 100°C (except for
rapeseed oils) varied considerably at (0.5-15.5) and (4.2-37.0
h) respectively. Macadamia nut oil was found to be the most
stable oil followed by argan oil, while walnut oil was the least
stable. Among the specialty oils, macadamia nut oil had the
lowest (4%) and walnut oil had the highest (71%) level of total
PUFA. The organic cold pressed rapeseed oil had considerably
lower PUFA (27%) compared with other rapeseed oils (28-
35%). In all the samples, α- and γ- tocopherols were the major
tocopherols; nut oils had generally lower levels. Total sterols
ranged from 889 to 15,106 ”g/g oil. The major sterols were
ÎČ-sitosterol (61-85%) and campesterol (6-20%). Argan oil
contained schottenol (35%) and spinasterol (32%). Compared
with literature values, no marked differences were observed
among the differently processed, organically grown or cold
pressed rapeseed oils and other specialty oils in this study
Contactless power interface for plug-in electric vehicles in V2G systems
In the paper a bi-directional power electronic interface based on an inductive coupled contactless energy transfer system for plug-in vehicles with Vehicle-to-Grid (V2G) capability is presented. To minimize the total losses of the system, a series resonant compensation circuit is applied assuring Near to Zero-Current Switching (N2ZCS) condition for insulated-gate bipolar transistors. The analytical expression of the dc voltage and current gains as well as energy transfer efficiency is given and discussed. The system uses modified FPGA based integral control method adjusting resonant frequency and guarantees very fast and stable operation. Simulation and experimental results illustrating properties of the developed 40-60kHz switching frequency operated 15kW laboratory prototype are presented
A Review of Contactless Electrical Power Transfer: Applications, Challenges and Future Trends
α-Parvin and ÎČ-parvin in the rat uterus during decidualisation and uterine receptivity
Argan [Argania spinosa (L.) Skeels] oil
Argan oil is extracted from the kernels of Argania spinosa (L.) Skeels, a tree that almost exclusively grows endemically in southern Morocco. If argan oil was initia11y only known around its traditional production area, major efforts combining chemical, agronomic and human sciences have led to its international recognition and marketing. In addition, to ensure the sustainable production of a sufficient quantity of argan kernels, a vast and unprecedented program that led to the reforestation of large areas of drylands has been developed in Morocco. Therefore, argan oil production is considered as an economic and ecologic success. Edible argan oil is prepared by cold-pressing roasted argan kernels. Unroasted kernels afford an oil of cosmetic grade, showing a bitter taste. Both oils, which are not refined and are virgin oils, share a similar fatty acid content that includes oleic and linoleic acids as major components. Additiona11y, argan oil is rich in antioxidants. Together, these components likely contribute to the oil pharmacological properties that, in humans, traditionally included cardiovascular disease and skin protection. Recent scientific studies have greatly expanded the scope of these pharmacological activities. Argan oil is now rewarded with a "Geographic Indication" that certifies its exclusive and authentic Moroccan origin and the compliance with strict production rules. In addition, the quality of argan oil can nowadays be ascertained by using an array of physicochemica1 methods. By-products, generated in large quantity during argan oil production, are also finding promising development routes