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Systemy zarządzania w drukarniach w świetle rozwoju branży poligraficznej w Polsce

Cabaj A.

Acta Poligraphica

2015

Vol. 6

29--35

The printing industry is reentering its flourishing years. Many entrepreneurs make use of various grants, among which are funds from the European Union. Companies are investing in new technologies, employee training, production line upgrades and more. Management system enhancements in the areas of health and safety management, environment management, or the quality management can also be observed. Reasons for this may be many, but a desire for increasing organization work efficiency, legal and standard compliance, as well as production optimization are seen to be paramount reasons. The article presents the most commonly implemented management systems along with their short descriptions.

The marine diatom cyclotella meneghiniana kűtzing as a producer of siderophore-like substances

Cabaj A., Kosakowska A.

Oceanological and Hydrobiological Studies

2005

Vol. 34, No.1

57--72

Iron(III) plays an important role in biochemical processes occurring in plants and phytoplankton. Under iron deficiency (< 10-5 mol dm-3), most microorganisms activate a high-affinity iron acquisition system, producing and secreting iron(III)-specific chelators called siderophores. The aim of this study was to assess the influence of the ionic and complexed form of iron(III) on the production of siderophore-like substances by the marine diatom Cyclotella meneghiniana Kűtzing (SAG 1020-1a). The growth parameters measured were the number of cells and the content of chlorophyll a and protein. The production of siderophores was determined by non-specific (Cu-CAS) and specific (Csaky, Arnow) chemical tests and by biological tests with the bacteria mutants Morganella morganii SBK-3, Salmonella typhimurium enb-7 and Microbacterium flavescens JG-9. The results obtained show that both the concentration and physico-chemical form of iron(III) influence the number of cells and the content of chlorophyll a per cell, but not the content of protein per cell. The optimum concentration of Fe (10-5 mol dm-3) stimulated growth and chlorophyll a production, while iron stress in ionic form inhibited both of these. However, the enrichment of the medium with a complexing factor (EDTA) evidently promoted growth and chlorophyll a production. Siderophore-like substances were found to be active under both iron deficiency (in ionic and complexed forms) and sufficiency. It has been demonstrated that C. meneghiniana can produce hydroxamate-type siderophores and [alfa] -keto-[alfa]-hydroxyacids, but it probably does not produce catecholates.