The sterol composition was as follows: sitostanol
85.6%, campestanol 8.0%, sitosterol 3.0%, and campesterol 2.5%.
Phytosterol, [alpha]-sitosterol, and sitostanol
have also been shown to suppress Th2 cytokine production and AHR in mice .
TC: total carbon; TN: total nitrogen; TP: total phosphorus; OM: organic matter; C[O.sub.3]=: carbonates; CO: coprostanol; EP: epicoprostanol; CH: cholesterol; CHL: cholestanol; CA: campesterol; CAL: campestanol; ST: stigmasterol; STL: stigmastanol; DI: dinosterol; SI: sitosterol; SIL: sitostanol
. Nortes season (Feb'12) n = 12 Median Min Max Sediment nutrients (%) TC 13.27 12.02 19.66 TN 0.75 0.36 1.53 TP 0.06 0.04 0.07 OM 12.65 6.08 36.87 C[O.sub.3.sup.=] 36.17 18.41 40.97 Sterols [micro]g [g.sup.-1] D.
Thirteen sterols (cholesterol, brassicasterol, 24-methylene-cholesterol, campesterol, campestanol, stigmasterol, [[DELTA].sup.7]-campesterol, [[DELTA].sup.5,23]-stigmastadienol, clerosterol, [beta]-sitosterol, sitostanol
, [[DELTA].sup.5]-avenasterol, and [[DELTA].sup.5,24]-stigmastadienol) were identified in oil based on their relative retention times with respect to the internal standard, cholestanol, according to the standardized reference method (EEC, 1991, Annexes V and VI).
One study examined the effects of plant stanols on fasting apoA-I concentrations and found increased apoA-I concentrations comparing 6 weeks of sitostanol
consumption with no sitostanol
There are approximately 200 phytosterols, among which [beta]-sitosterol, campesterol, and sitostanol
are the major ones .
A commercial phytosterol preparation containing [sz]-sitosterol, campesterol, sitostanol
and campestanol was added at a 1.8% concentration to pasteurized milk.
Technical [beta]-sitosterol (~60%, SigmaAldrich) was chosen as a reference mixture as it contains two other phytosterols (campesterol and sitostanol
) which can be used for further authentication of chromatographic peaks in natural samples.
A commercial phytosterol preparation (CPP) containing [beta]-sitosterol, campesterol, sitostanol
and campestanol was added at a concentration of 1.8% (w/v) to pasteurized milk.