DEVELOPMENT OF A COMPOSITE TECHNIQUE FOR PRECONDITIONING OF 41CR4 STEEL USED AS GEAR MATERIAL: EXAMINATION OF ITS MICROSTRUCTURAL CHARACTERISTICS AND PROPERTIES

Commercial 41Cr4 (ISO standard) steel was treated by a composite technique.An intermediate layer was introduced firstly at the 41Cr4 steel surface by traditional carburizing and nitriding.Then a hard Cr coating was brush-plated on the intermediate layer.Finally, the coating layer was modified by high current pulsed electron Collectables beam (HCPEB

Amitosis is a widespread form of unbalanced nuclear division whose biomedical and evolutionary significance remain unclear.Traditionally, insights into the genetics of amitosis have been gleaned by assessing the rate of phenotypic assortment.Though powerful, this experimental approach relies on the availability of phenotypic markers.Leveraging Para

During 2008 and 2009 phytopathological isolations were done from soybean plants and seed samples from several localities in Serbia.A total of 19 isolates of Alternaria spp.were isolated, 13 from the seed and 3 from both leaf and stem.In order to determine and characterize isolates, cultural, morphological, molecular and pathogenic characteristics w

This article highlights the relevance of new business models Plein air - Homme - Chaussures - Bottes and ecosystems in the knowledge-era economy.We begin with an introduction then argue that the shift in what is valued drives the need for new business models.The third section provides examples of innovative business models.The fourth section descri