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• The importance of selenium in the living world and in the scientific research

  278-286

  Éva Széles

  Árpád Tóth

  Attila Nagy

  József Prokisch

  Béla Kovács

  Zoltán Győri

  Views:

  233

  Presently, selenium (Se) is one of the most investigated microelements. It has an important proven role in many vital processes. Directly or indirectly, selenium deficiency can play a role in the development of many diseases. On the other hand, the concentration range in which selenium is essential is narrow; there is a narrow gap between necessary and toxic content in dietary intake. In this context, selenium contamination poses a further health risk for people if they live near the industrial areas and mining activity.
  In this paper, we comprehensively introduce the very important trace element selenium. We studied the base parameters, deposit, analytic and deficiencies, problem of contamination and also the solution of contamination problems of selenium.

• An Applicable Method for Elaborating Agricultural Logistics Trends

  66-69

  Szabolcs Duleba

  Views:

  138

  Hungarian scientific practice focuses mainly on statistical methods to elaborate sector-specific trends. This paper aims to offer another alternative. The author’s view is that in rapidly and significantly changing markets, data extrapolation is not necessarily the ideal way to forecast certain trends of the sector. Agricultural Supply Chains have been restructured lately. There are remarkable developments in fields such as: warehousing systems, telematic systems, transportation. This is one of the reasons several drivers may alter the trends determined previously by statistical professionals. AHP (Analytic Hierarchy Process) synthesizes expert opinions concerning the future, so it is a decision-supporting method and therefore more flexible to the changes of the sector. The author introduces the application of the AHP for Agricultural Logistics Trends.