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The article tries to find the best solution of the system, which aims to dispose of the waste stream, being at the same time an economically justified and socially acceptable system. In order to find the best possible system three strategies for dealing with waste were considered, evaluated by 11 criteria in line with sustainable development, included in the following groups: environmental, social, and economic. The evaluation criteria are used in the multi-criteria analysis, which is the final step in the decision-making analysis. The most effective solution selected is additionally dependent on the importance of specific criteria adopted for the calculations. The proposed methodology was used and verified in the selection of a waste management system for the city of Szczecin.
Species composition of lawns in the housing estates, planted – among other reasons – in order to diversify the urban landscape, is often modified and enriched with other, spontaneously appearing species. The aim of the present work was to determine the floristic and phytosociological diversity of selected housing estate lawns of three different age groups, in the city of Szczecin, in three neighbouring housing estates (Niebuszewo, Warszewo, and Żelechowa). It was assumed that over the years, lawns are gradually becoming weaker, which may be due to the occurrence of negative anthropogenic factors of increasing intensity. It was found that despite the one designated plant community in all the analysed housing estate lawns (namely, Poa pratensis – Festuca rubra), there are differences between the studied areas, in terms of the number of species occurring therein, and the values of selected ecological (environmental) indicators.
The study population consisted of 140 consecutive colorectal cancer patients, inhabitants of the city of Szczecin, north-west Poland, who were histopathologically diagnosed in the period of 2 years - 1991-1992. Family history was obtained in 124 (88.6%) of patients. A definitive diagnosis of HNPCC was established if requirements of the International Collaborative Group on HNPCC (ICG- HNPCC) were met. Suspected HNPCC were recognised according to criteria described by Ponz de Leon or Mecklin or Kunitomo. HNPCC as defined by International Collaborative Group on HNPCC was identified in 2 (1.6%) families. Suspected HNPCC were recognised in 16.9%, 3.2% and 4.0% of patients if Ponz de Leon or Mecklin or Kunitomo criteria were applied, respectively. In our series in 19 of 124 cases, colorectal carcinomas were diagnosed in patients under 50 years of age. Only in one of these cases, features characteristic of HNPCC other than young age were found which suggests that in our region the frequency of somatic or germ line de novo mutations in genes predisposing to colorectal cancer may be high. Our results suggest that the frequency of HNPCC inherited from ancestors in Poland and other countries is approximately similar and this syndrome is common disease everywhere.
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Rhododendrons in gardens in the city of Szczecin

88%
Rhododendrons in the cities are relatively rare planted shrubs. Climatical requirements in Szczecin allowed for good growth of those plants. There are grown old specimens planted before many years. In the last time there are often meet in gardens of Szczecin (plants 6-10 years old).
The aim of this study was to analyse health behavior, taking into account the following aspects: proper nutritional habits (PNH), preventive behaviors (PB), positive thinking (PT) and health practices (HP) in the light of general index of intensity of health behaviors (GIIHB) of pregnant women participating in antenatal classes in Szczecin. Juczyński’s (2001) Health Behavior (HBI) Inventory constitutes the methodological basis for this investigation. Among examined respondents participating in prenatal school activities a high health behaviors indicator was stated in nearly half of them (49.0%). Unfortunately, among the rest of examined pregnant women health behaviors were on the average (37.4%) or low level (13.6%). None of the above categories of health behaviours obtained remarkably higher point values. Therefore, it can be stated that there is a necessity to promote preventive activities to spread information concerning healthy eating habits and to recommend advantages resulting from health behaviors.
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Cladosporium spores in the air of Szczecin

75%
Moulds are common aeroallergens and Cladosporium is considered to be the most prevalent of them. The objective of the studies was to determine the seasonal variation in concentrations of Cladosporium spores due to meteorological parameters. The meteorological parameters analysed were maximum air temperature, relative humidity, amount of precipitation and wind speed. The greatest threat from Cladosporium allergens was posed from the middle of May (2004, 2006) and June (2005) till the middle of October (2005) and in the end of October (2004) till the middle of November (2006). Statistically significant correlations were found among the Cladosporium spore count in the air and maximum air temperature in all the analysed seasons, and amount of precipitation only in one season. The spore count of Cladosporium was determined by weather conditions, especially by air temperature.
The studies included 10 public indoor swimming pools and 3 public open-air swimming pools located in the city of Szczecin. In 2003, water samples were collected for detection of virulent amphizoic amoebae strains. In all pools, 16 strains of thermophilic Acanthamoeba spp. were isolated, 5 of which proved virulent for mice. No pathogenic strains were detected in the water sampled in the indoor swimming pools, and the virulent strains, AD 16, AD 148, AD 166, AM 17, and AM 148, were found only in the open-air swimming pools. The post-mortem studies of mice that had been inoculated with these strains revealed the amoebae invasions in brain, lungs, liver, kidneys, and spleen.
The studies aimed at sanitary evaluation of two small lakes situated in the city of Szczecin, Poland: Rusaka and Syrenie Stawy. The studies were performed in summer months (June to August) in 1995-1996 and 1998-1999. In water samples, total coliforms, faecal coliforms, faecal streptococci and pollution-indicative index bacteria (TVC 20oC, TVC 37oC) were estimated. The analyses demonstrated that Rusaka lake exhibited lower levels of pollution than that shown by Syrenie Stawy. Also, the obtained results demonstrated in general higher level of pollution than that noted by other authors in municipal lakes.
Our study is aimed at microbiological analysis of water samples originating from a small municipal lake in Szczecin, called Syrenie Stawy. The studies were conducted for a year in monthly intervals. The variables estimated in the water samples included the extent of contamination (TVC 20℃ and TVC 37℃ ), content of sanitary status bacteria (coli group bacteria, TC), foecal-type coli group bacteria (FC), foecal streptococci (FS) and bacteria of physiological types (denitrification, amonification, sulphate- and sulphite-reducing bacteria). Results of the studies demonstrated high content of sanitary bacteria, which pointed to a significant contamination of the lake. High content of psychrophilic and mesophilic bacteria pointed to high amounts of organic substances in water. On the other hand, the high content of NPL, of coli group bacteria titres and of foecal type coli group bacteria provided evidence for drainage of communal sewage to waters of Syrenie Stawy. This was additionally proven by the presence of foecal streptococci. As far as physiological bacteria were concerned, the extensive differences in between mean values obtained for various sampling points may indicate unequal loading of Syrenie Stawy waters with contaminants in various points of their coastal zone.
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