A new type of spindle-shaped nanoscale yolk/shell magnetic stirring bar containing noble metal nanoparticles was prepared. The as-synthesized Pd-Fe@meso-SiO2 not only showed impressive activity and stability as a heterogeneous catalyst in a macroscopic flask system, but also acted as an efficient nanoscale magnetic stir bar in a microscopic droplet system.

We report on the confinement of a Bose-Einstein condensate in an annular trap with widely tunable parameters. The relies combination magnetic, optical and radio-frequency fields. loading procedure is discussed. present traps radii adjusted between 20 150 micrometers. demonstrate preparation persistent flows both rotating laser stirrer global quadrupole deformation ring.Our setup well adapted fo...

Deposits of barium sulfate are a common issue in the oil and gas industry. The presence these crystals impacts production, causing technical problems such as inhibiting flow rate, increasing pressure pipe, pipe to break be damaged. results this study show formation (BaSO4) with batch crystallizer method at 300 °C under influence stirring rotation speed (0 rpm, 120 240 360 480 rpm) additive conc...

This paper reports on a simple method to prepare a hydrophobic surface on black silicon, which is fabricated by metal-assisted wet etching. To increase the reaction rate, the reaction device was placed in a heat collection-constant temperature type magnetic stirrer and set at room temperature. It was demonstrated that the micro- and nanoscale spikes on the black silicon made the surface become ...

Abstract In this paper an attempt has been made to prepare bio-composite using water hyacinth fiber as reinforcement and potato starch matrix. The renewable resource, is used the major composition of proposed bio-composite. Since bio polymer can contribute better mechanical properties, it act a substitute for existing synthetic fibers. biodegradable, environmentally friendly less expensive char...

Chatter is a concern in boring process, due to the low dynamic stiffness of long cantilever boring bars. Chatter suppression in machining permits higher productivity and better surface finishes. The MR fluid, which changes stiffness and undergoes a phase transformation when subjected to an external magnetic field, is applied to adjust the stiffness of the boring bar and suppress chatter. The st...

We demonstrate that the trapped magnetic resonance mode can be induced in an asymmetric double-bar structure for electromagnetic waves normally incident onto the double-bar plane, which mode otherwise cannot be excited if the double bars are equal in length. By adjusting the structural geometry, the trapped magnetic resonance becomes transparent with little resonance absorption when it happens ...

We have begun a systematic numerical study of the nonlinear growth of nonaxisymmetric perturbations during the ambipolar diffusion-driven evolution of initially magnetically subcritical molecular clouds, with an eye on the formation of binaries, multiple stellar systems and small clusters. In this initial study, we focus on the m = 2 (or bar) mode, which is shown to be unstable during the dynam...

A simple andefficient hollow fiber-based method,viz magnetic solvent bar liquid-phasemicroextraction (MSB-LPME) combined with gas chromatography-flame ionization detection (GCFID)has been successfully developed for the trace determination of mononitrotoluenes (MNTs) innatural water samples. The analytes were extracted from sample solution to the organic solventimmobilize...