The polyisoprenols (PIs) dolichol and undecaprenol function as chemical carriers of glycosyl residues in the membrane-directed synthesis of glycoconjugates in prokaryotic and eukaryotic cells. The molecular details of how these lipid cofactors function is unknown. Presented here are results of deuterium NMR investigations of site specifically 2H-labeled PIs incorporated into model membranes. To...

The purposes of this research were to evaluate phorbol esters (PEs) degradation rate and enzyme production yield using submerged fermentation (SMF) as screening method and further using solid-state fermentation (SSF) as pilot scale-up study. SMF was carried out with 20 g seed cake in 100 ml minimal salt medium for 7 days incubation, while SSF was done with 20 g seed cake at 50% moisture content...

A new high-speed pin-on-bar type tribometer has been developed to study the variation of friction coefficient with respect local thermomechanical contact conditions between tool and workpiece when drilling C45 steel. The forces temperatures are measured over a range pin indent depths sliding velocities in open closed loop tribo-systems. tribometer’s ability recreate is demonstrated induced surf...

From the point of view production, it is fundamental importance to know cutting parameters at which new surface component was created because only in this way possible understand nature and properties surface. Based on information obtained, then improve processes used or create machined surfaces with, if not zero, least a minimum number flaws. The main purpose article comprehensive overview beh...

The sliding diamond burnishing process is one among many post-machining processes applied for surface integrity enhancement purposes. This experimental study aims to investigate the effect of parameters on roughness product. Taguchi design was used, and machining considered were force, feed rate, number passes with three levels each. C45 steel alloy workpieces face milled same variables their m...

One of the most significant performance indicators for measuring machinability materials is tool wear and surface roughness. Choosing best combination cutting parameters can help reduce production costs, which what manufacturing industry interested in. At same time, industries are always looking an alternative to conventional flood cooling since its use creates environmental burden health conce...