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Modern methods to determine vitamin E in foods and feeds
53-58Views:266Highly specific and sensitive, the proposed fluorometric method for determining α-tocopherol is robust and fairly fast. It
has been tested in parallel with a conventional thin layer chromatographic method on foods and feeds. The only necessary
cleanup is the usual saponification. The unsaponificable fraction can be extracted with ethyl ether or, preferably, with
Extrelut columns. Reagents and their solvents are added to the isooctane solution before each successive reaction and are
then eliminated by partition with water. The α-tocopherol (α-T) derivative always remains in isooctane. The first step is
nitrosation and elimination of tocopherols and tocotrienols other than α-isomers. α-T is then oxidized to α-tocored (α-TR)
with a mixture of sulfuric acid, ferric chloride, and iodine bromide. Α-TR is then condensed to a new reagent: 4,5-dimethylo-
phenylenediamine. The phenazine formed is strongly fluorescent. Iodine and bromine add to the double bonds of α-
tocotrienol present and quench the fluorescence of its phenazine. -
Contradiction in the agrofinancial regulation of agricultural producers
97-107Views:213Hungary is a country of favourable conditions with agropotential, for this reason the regulations regarding agriculture is constantly the bone of legislative contention. The
purpose of this study is to present the actual agropotential contradictions concerning the agricultural producers, specifically focusing on certain problems without any detailed representation of the valid rules of law. The agrofinancial anomalies referring to agricultural producers can be found mostly in the system of the personal income tax (allowance, tax immunity), the value added tax (special agricultural legal position) as well as the social insurance.
The severity of the problem is supported by the agricultural producers’ behavioral types of paying taxes, globalisation process of these days and our place in the European Union. The resolution of the contradictions in agriculture does not lie by any means in the proper way of making the rules of the law of taxation, but in a comprehensive economic policy, which is to be waited for.