LDL was oxidized at pH 4.5 and 37 °C in the presence initially of ferrous iron (5 μM FeSO4) or ferric iron (5 μM FeCl3).
The rare-earth oxides form tens of thousands of ternary and higher-order compounds with other oxides, such as aluminum oxide (Al2O3), ferric oxide (Fe2O3), cobalt sesquioxide (Co2O3), chromium sesquioxide (Cr2O3), gallium sesquioxide (Ga2O3), and manganese sesquioxide (Mn2O3).
On the basis of these parameters, the addition of 1.0 mmol·L-1 ferric ion was found to significantly improve the enzymolysis of snailases for the first time.
To prepare the FRAP reagent, a mixture of 0.3 mol L-1 acetate buffer (pH 3.6), 10 mmol L-1 tripyridyltriazine (TPTZ), and 20 mmol L-1 ferric chloride (10 1 1, v/v/v) was made.
Various other iron salts (including ferrous oxalate (FeC2O4), ferric citrate (FeC6H5O7), and ferric sulfate (Fe2 SO4 3) were also evaluated.
Alum [Al2 SO4 3·18H2O] ferric chloride (FeCl3) and ferric sulfate [Fe2 SO4 3·7H2O] is effective (Harper and Kingham 1992; Fields et al. 2000).
Tetraethyl orthosilicate (TEOS), ferrous chloride (FeCl3), ferric chloride (FeCl2), and sodium citrate were purchased from Xilong Chemical Co. , Ltd
At a pH of 7, ferric chloride performed better in removing AY11.
Figure 3 Ferric Reducing Antioxidant Power (FRAP) values of fern extracts.
At an initial pH of 4, ferric chloride performed slightly better in removing AO7.
