For instance, three food-antioxidants (i.e. propy gallate (PG), 2,4,5-trihydroxybutyryl benzene (THBP) and tert-butylhydroquinone (TBHQ)) are determined simultaneously by this method satisfactorily.
Preservation time and relative rectification factor of hydroquinone,tert-butyl hydroquinone and 2,5-di-tert-butyl hydroquinone were determined. The recoveries are 100.3%,98.2%and 101.8% respectively.
Most of the chemical additives previously used in food were synthetic phenolic compounds, such as tert-Butylhydroquinone(TBHQ), Butylated hydroxyanisole(BHA), Butylated hydroxtoluene (BHT) and Tocopherol (AH2) and so on.
Before the processes of emusifying , homogeniring and mixing, tert-butyl hydroquinone (TBHQ)—a kind of Antioxidant, propolis、Oenothera biennis oil and VE are added to the salad oil, which not only increases the antistaling and antioxidative activities of oil Lipide, but also makes the oil nave the Lipide-reducing and stomachic tonic effects.
Samples were stored in the artificial light or in the dark to assess the effects of photooxidative stress on stability of crude and refined mackerel (Pneumatophorus japoncicus) oils and antioxidant activity of butylated hydroxyanisole (BHA) and tert-butylhydroquinone (TBHQ). The changes of peroxide value (POV) and thiobarbituric acid (TBA) value were monitored during 18 days at 5 ℃ and 40℃.
For instance, three food-antioxidants (i.e. propy gallate (PG), 2,4,5-trihydroxybutyryl benzene (THBP) and tert-butylhydroquinone (TBHQ)) are determined simultaneously by this method satisfactorily.
Preservation time and relative rectification factor of hydroquinone,tert-butyl hydroquinone and 2,5-di-tert-butyl hydroquinone were determined. The recoveries are 100.3%,98.2%and 101.8% respectively.
Most of the chemical additives previously used in food were synthetic phenolic compounds, such as tert-Butylhydroquinone(TBHQ), Butylated hydroxyanisole(BHA), Butylated hydroxtoluene (BHT) and Tocopherol (AH2) and so on.
Before the processes of emusifying , homogeniring and mixing, tert-butyl hydroquinone (TBHQ)—a kind of Antioxidant, propolis、Oenothera biennis oil and VE are added to the salad oil, which not only increases the antistaling and antioxidative activities of oil Lipide, but also makes the oil nave the Lipide-reducing and stomachic tonic effects.
Samples were stored in the artificial light or in the dark to assess the effects of photooxidative stress on stability of crude and refined mackerel (Pneumatophorus japoncicus) oils and antioxidant activity of butylated hydroxyanisole (BHA) and tert-butylhydroquinone (TBHQ). The changes of peroxide value (POV) and thiobarbituric acid (TBA) value were monitored during 18 days at 5 ℃ and 40℃.
Analogous processes accompany redox transformations of 2,6-di-tert-butylhydroquinone, 2,6-diphenyl-para-benzoquinone, and 2,4,6-tri-tert-butylphenol adsorbed on silica gel.
Addition of tert-butylhydroquinone, a compound which generates reactive oxygen species through redox cycling, also reduced expression of the NADH-cytochrome b5 reductase.
It is found that the catalytic activity correlates well with the amount of medium-strong acid sites on the surface of the catalysts, and the selectivity towards 2-tert-Butylhydroquinone has some connection with the pore size of the catalysts.
Samples were stored in the artificial light or in the dark to assess the effects of photooxidative stress on stability of crude and refined mackerel (Pneumatophorus japoncicus) oils and antioxidant activity of butylated hydroxyanisole (BHA) and tert-butylhydroquinone (TBHQ). The changes of peroxide value (POV) and thiobarbituric acid (TBA) value were monitored during 18 days at 5 ℃ and 40℃. The results showed that the exposure in visible light played a critical role in the acceleration of macker...
The derivative ratio spectra is found by derivation of the ratio of the spectra of compounds in a mixture to the spectra of the interfering component against the wavelength. The interference of the addition effect of absorbances of interfering component is thus eliminated. This method is applied effectively to the analysis of three-componental mixture systems. For instance, three food-antioxidants (i.e. propy gallate (PG), 2,4,5-trihydroxybutyryl benzene (THBP) and tert-butylhydroquinone (TBHQ))...
Eight preservatives alcohol,dehydroacetic-acid,butylated-hydroxytoluene,proply-p-hydroxybenzoat,potassium-sorbate,benzoylperoxide,tert-butylhydroquinone,pyrola lann were used for extending fresh noodle shelf life.The result shows that four additives of them is effective at 6℃ temperature.And the most optimal combination different additives was dehydroacetic acid 0.06%,potassium sorbate 0.06%,alcohol 4%(base on wheat flour).It can extend fresh noodle shelf life about 24~48h