Four different strawberry varieties were used for puree production and stored at -18degreesC for 12 months. Every three months samples were tested for rheological parameters, polyphenols content and ...antioxidant activity. Mathematical models for rheological behaviour of the samples were determined together with consistency coefficient (k) and flow behaviour index (n). Fluidity of the samples increased over time, but pseudoplastic behaviour remained through tested period. The biggest decrease of polyphenol content was observed between 9 and 12 months of storage, while antioxidant activity decreased the most during first three months by DPPH and ABTS method. Keywords: antioxidant activity, polyphenols, rheology, strawberries
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Dostopno za:
DOBA, IZUM, KILJ, NUK, PILJ, PNG, SAZU, UILJ, UKNU, UL, UM, UPUK
The occurrence and concentrations of fluoride in surface and groundwater depend on pH, total dissolved solids, alkalinity, hardness, and geochemical composition of aquifers. However, in many ...countries, elevated fluoride concentration values are the result of fluoride-contaminated wastewater discharges. Because of fluoride pollution and the health problems that it causes, the World Health Organization (WHO) has set a maximum permissible fluoride content in drinking water of 1.5 mg l−1. There are different ways of removing elevated concentrations of fluoride from water, such as coagulation and precipitation, membrane processes, electrochemical treatments, ion-exchange and its modification, but the adsorption process is generally accepted as the cheapest and most effective method for removing fluoride from water. Organic waste is increasing every day, especially in developed countries, and is generated in both industries and households. One of the ways to reduce such waste is the production of adsorbents for water defluorination. Adsorbents, most often prepared as activated carbon, can be obtained from various materials such as egg shells, fruit and vegetable peel, various leaves, stems, trunk bark, grain shells, legume shells, and many others. The aim of this paper is to provide an overview of the latest research on the use of adsorbents obtained from organic waste materials in order to remove elevated concentrations of fluoride from water.
У раду је приказано истраживање спроведено у циљу анализе за- ступљености ресурса деце и младих у сукобу са нормама заједнице у различи- тим доменима, као и развоја инструмента за њихову обухватну и ...брзу процену у истраживањима и превентивним програмима. Упитник Листа снага деце и младих у сукобу са нормама заједнице – ЛС1 је примењен од стране 32 стручњака из 9 цен- тара за социјални рад у процени 67 особе узраста од 11–20 година упућених због сумње на антисоцијално понашање. Добијена је највећа заступљеност ресурса у вршњачкој групи и породици, а најмања на послу и у школи. ЛС1 је показао високу поузданост и добру конструктивну, конвергентну и критеријумску ваљаност, као и корисност у практичној примени. На основу сугестија стручњака, ЛС1 је ревидиран у упитник ЛС2.
The paper presents a research conducted in order to analyze the representation of resources of children and youth in conflict with community norms in different domains, and to develop an instrument ...for their comprehensive and rapid assessment in research and prevention programs. A questionnaire, the List of Strengths of Children and Youth in Conflict with Community Norms - LS1, was applied by 32 experts from 9 centers for social work in the assessment of 67 persons aged 11 to 20, referred there due to suspicion of antisocial behavior. The highest representation of resources was obtained in the peer and family groups, and the lowest at work and at school. The LS1 has shown high reliability and a good constructive, convergent and criterion validity, as well as usefulness in practical application. Based on expert suggestions, the LS1 was revised in the LS2 questionnaire.
Data on the incidence of insulin-dependent diabetes mellitus (IDDM) are presented. The study concerned the Belgrade population, aged 0-14, over the period from 1982 to 1992. A retrospective technique ...was used to record newly diagnosed cases of IDDM. Hospital records were used as the primary source, and the Population-based register as the secondary source of data. In total, 259 newly diagnosed cases were detected (the completeness of ascertainment was 90.5%). In the Population-based register only 165 cases were included, i.e. 63.7% of all detected IDDM patients, or 57.7% of all expected IDDM incidences cosses. It must be, therefore, concluded that the Register for diabetes mellitus has not been a very reliable source of data.
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