This paper presents both the dynamic modelling and study of variation certain physical parameters (pole area, gap base current) that change magnetic stiffness a radial heteropolar Rotor Magnetic Bearing (RMB) aiming at analysis magnitude its control current for three different equilibrium points. The RMB is modelled as fully uncoupled symmetric active 8-pole bearing. performed using spectral cu...

Magnetospirillum sp. AMB-l is a freshwater magnetic bacterium which synthesizes intracellular particles of magnetite (Fe304). A genomic DNA fragment required for synthesis of magnetic particles, was previously isolated from a non-magnetic transposon Tn5 mutant. We have determined the complete nucleotide sequence of this fragment. The 2975 bp region contains two putative open reading frames (ORF...

OBJECTIVES This study describes the antileishmanial efficacy of the novel drug formulation of amphotericin B (AmB) attached to functionalized carbon nanotubes (f-CNTs) and compares it with AmB. METHODS f-CNTs were prepared in a two-step chemical carboxylation and amidation process. The AmB was then attached to make f-CNT-AmB and its construction was confirmed by Fourier transform infrared (FT...

Heterotrophic respiration contributes a substantial fraction of the carbon flux from soil to atmosphere, and responds strongly to environmental conditions. However, the mechanisms through which short-term changes in environmental conditions affect microbial respiration still remain unclear. Microorganisms cope with adverse environmental conditions by transitioning into and out of dormancy, a st...

Active magnetic bearings require some form of control, based on feedback of the position of the suspended object, to overcome open–loop instability and to achieve targeted system performance by modifying the bearing dynamics. In many applications of magnetic bearings, a need to eliminate discrete position sensors may arise either from economic or reliability considerations. Magnetic bearings wh...

In a prospective, randomized clinical trial, the toxicity of 1 mg of amphotericin B (AmB) per kg of body weight per day infused in 5% dextrose was compared with that of AmB infused in lipid emulsion in children with malignant disease. In an analysis of 82 children who received a full course of 6 days or more of AmB (117 courses), it was shown that there were significant increases in plasma urea...

For decades, sensorless position estimation methods gained lots of interest from the research community, especially in field electric drives and active magnetic bearings (AMBs). In particular, direct flux control (DFC) technique promises unique advantages over other techniques, such as a higher bandwidth, but on hand, it requires coils to be connected star topology. Until now, star-point connec...

conclusions nearly one-third (27.5%) of our cohort developed nephrotoxicity within the first week of amb treatment. hypokalemia and renal potassium wasting were more notable, affecting about one-half and one-third of the amb recipients, respectively. results among the 40 patients recruited for the study, 11 (27.5%) patients developed amb nephrotoxicity with a mean ± standard deviation onset of ...