The table shows the indicators of the occurrence of the intestinal worms and Lamblia intestinalis in children of the Śrem district (Poznań province) depending on the methods in use and on the material.
In the districts of Srem and Gostyń (Province of Poznań) 1259 persons have been tested for parasites by means of decantation, Fiilleborne, and Rivas methods; the results obtained were 338 positive findings. The first place in the mentioned area belongs to the invasion of T. trichiura. More accurate results depend on the sex (Males table No. 2, Females table No. I) and age of the examined people. The relation between the total amount and the infestated persons in different groups of worms and in the classes of town and country population is shown in tables.
Seasonal changes in the levels of water-soluble carbohydrates, free proline and tolerance to freezing and water deficit were studied in leaves of cherry laurel (Prunus laurocerasus) and ivy (Hedera helix). Frost and water deficit tolerance was estimated based on the measurement of electrical conductivity of aqueous media containing leaf discs that were previously treated with frost (–7°C) or polyethylene glycol solution (PEG 600), respectively. Carbohydrate content in leaves of examined species changed differently throughout the measurement period. In laurel leaves the highest carbohydrate level was found in February, while it was lowest in June. In contrast, in ivy leaves the highest carbohydrate content was recorded during summer (June, July), while the lowest in February. However, a lack of correlation between soluble carbohydrate level and membrane injury index was shown in this study. Free proline content in leaves of investigated species was the highest in early spring, i.e. April. The lowest level of free proline in laurel leaves was found in July, September and October, but in ivy from July to February. A negative correlation between proline content and membrane injury index observed in frost and PEG treated leaves of both species suggest that this amino acid may have resulted on membrane protection.