Karolina Piotrowska

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The effects of age and sex of guinea fowl on their dressing percentage, carcass composition, pH value, water holding capacity, colour and sensory properties of meat was determined. At 16 weeks of age, males and females had significantly higher body weights and carcass weights compared to birds at 13 weeks of age. The carcasses of older birds contained more(More)
Abstract: The stability of aqueous and non-aqueous papaverine hydrochloride solutions exposed to the UV radiation is poor. In order to enhance its photo-stability suitable light absorbers may be used. There werefour photo-protectors considered in this work: 4-aminobenzoic acid, sodium benzoate, methyl 4-hydroxybenzoate and propyl 4-hydroxybenzoate, whose UV(More)
HPCE methodology was modified to be used in kinetic experiments on photooxidation reactions of papaverine hydrochloride 1 and its oxidation products (papaverinol 2 and papaveraldine hydrochloride 3) chloroform solutions exposed to UV254 light in aerobic conditions. On photooxygenation of the above compounds is formed the final degradation product, a brown(More)
Papaverine hydrochloride, papaverinol, and papaveraldine chloroform solutions were exposed to UV light of 254 nm in atmospheric, aerobic and anaerobic (helium) conditions. The same degradation products appear (TLC) in the above papaverine hydrochloride chloroform solutions. However, the rate of papaverine hydrochloride degradation processes is enhanced as a(More)
In 1915 Gadamer published in this journal [1] a procedure for the synthesis of papaverinol 2 from papaverine 1 in excellent yield. However, he did not investigate the formation of a violet fluorescence produced upon crystallization of papaverinol 2 from ethanol. The compound responsible for this fluorescence was isolated and identified as the yet unknown(More)
The structure of the final degradation product formed in papaverine solutions in either water or chloroform was found to be a 2, 3, 9, 10-tetramethoxy-12-oxo-12H-indolo [2, 1-a] isoquinolinylium salt (a dibenzo [b, g] pyrrocolonium derivative). Its formation from papaverine oxidation products that is papaverinol, papaveraldine, and papaverine-N-oxide(More)
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