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Effect of technological measures on the quality of canned banana desserts

100%

Jaworska G. , Kmiecik W. , Slupski J.

tom 07

nr 1

The banana fruit (yellow peel with brown flecks) were used for producing canned banana desserts. In first part of the investigation 17 samples were considered for various pre-treatment methods of bananas. Sliced bananas were blanched (at 80-82°C for 120 s) or soaked (24 h) in sugar syrup (10%, 30% and 50%) with L-ascorbic (0.2%) or citric (0.8-1.0%) acids, acid sodium sulphite (0.2%) and calcium chloride (1%). On the basis of the first part of the experiment, the best combinations were selected for further investigation. In the second part of the experiment the determinations concerned the effect of technological measures on the level of physico-chemical indices and on the sensorial traits of the bananas. In this part of investigetion all the applied methods of pre-treatment of banana slices ensure the production of good quality canned products. The applied calcium chloride had the most favourable effect, improving the hardness and sensory quality.

Sezonowe zmiany koncentracji zelaza i manganu w osadach dennych studzienek wodosciekowych na obszarze miasta Krakowa

61%

Wardas M. , Pawlikowski M. , Szota R. , Czaplinski T. , Chrapkiewicz D. , Figiel J.

tom 55

nr Supl.

233-239

W próbkach osadów ściekowych powstających w obiektach kanalizacji deszczowej głównych ulic Krakowa, pobranych w czterech sezonach 2002/03 oceniono zawartość Fe i Mn, oraz skład ziarnowy i mineralny a także zmiany wskaźników fizykochemicznych środowiska wodnego osadów, jak pH, potencjału oksydacyjno-redukcyjnego Eh i przewodności elektrolitycznej właściwej (PEW).

Sediments that appear in sewage system constructions were determined on the basis of examination of samples from sewage catch pits of main streets of Cracow. Sampling was carried out in four seasons. Concentration of Fe and Mn was estimated, taking into account granulation and phase composition of sewage sediments. Changeable influence of physico-chemical indicators of aquatic environment: pH, Eh and PEW were also considered. Seasonal differentiation of Fe and Mn concentration in sewage sediments results from variable environment pollution by industry, transport and municipal economy. Corrosion of sewage infrastructure cannot be neglected either. Qualitative phase composition of bottom sediments of sewage systems have indicated a degree of environmental pollution as well as conditions of infrastructure of Cracow Conurbation pipe-away sewage system.