Magnetorheological elastomers (MREs) are mainly composed of magnetizable particles and elastic polymer. The polymer matrix plays an important role in mechanical performances of MREs. In this study, the polyurethane (PU), which is synthesized by using toluene diisocyanate (TDI) and poly (propylene glycol) (PPG-220), is selected as a matrix because it has better degradation stability than natural...

• Magneto-responsive rheology of highly flowable cement paste with PCE is studied. Flowable magnetic particles and can exhibit MR response. increases relative effect while slightly decreases absolute effect. Applying field plays a major role in stiffness for PCE. Magneto-rheology control, by means adding magnetizable applying field, potential approach to satisfy the contradicting requirements f...

Abstract Magnetostriction effect of a spherical sample magnetoactive elastomer (MAE) is analyzed. In comparison with the preceding study, consideration done on more realistic basis: taking into account saturation MAE magnetization in contrast to former model where was supposed be linear whatever field strength. This thorough investigation has revealed that striction-induced elongation effect, d...

Unsteady oscillatory flow of generalized Burgers’ fluid in a circular channel tube in the porous medium is investigated under the influence of time-dependent trapezoidal pressure gradient given by an infinite Fourier series. An exact analytical expression for the solution for the fluid velocity and the shear stress are recovered by using the similarity arguments together with the integral trans...

Magnetorheological (MR) uids constitute examples of controllable (\smart") u-ids, whose rheological properties vary in response to an applied magnetic eld. These uids typically consist of micron-sized, magnetizable particles dispersed in a non-permeable carrier uid. The essential characteristic of MR uids is that they may be continuously and reversibly varied from a state of free owing liquids ...

BACKGROUND Quantum rings connected to ballistic circuits couple strongly to external magnetic fields if the connection is not symmetric. Moreover, properly connected rings can be used to pump currents in the wires giving raise to a number of interesting new phenomena. At half filling using a time-dependent magnetic field in the plane of the ring one can pump a pure spin current, excited by the ...

Zinc(II) as the only transition metal lacking redox activity is an essential part of approximately 10% proteins as a cofactor of these proteins. Considering the fact that there are numerous zinc(II) containing proteins, proteomics and metallomics studies aimed on them require accurate methods for preparation of real biological samples prior to their subsequent analysis using 2DE and MS. For thi...

We have developed a new method for assessing the bioactivity of thyrotropin (TSH) in human serum by measuring cAMP production in FRTL-5 thyroid cells as an index of stimulation. To eliminate serum inhibitors of the cAMP response to TSH, we purified samples by mixing them with anti-TSH antibodies coupled to magnetizable particles. This method of immunoaffinity purification was simple and suitabl...

The use of stents for vascular disease has resulted in a paradigm shift with significant improvement in therapeutic outcomes. Polymer-coated drug-eluting stents (DES) have also significantly reduced the incidence of reobstruction post stenting, a disorder termed in-stent restenosis. However, the current DESs lack the capacity for adjustment of the drug dose and release kinetics to the disease s...

We investigated a new method for the immunoextraction of atrial natriuretic peptide (ANP) from plasma. Anti-ANP antibody was coupled to magnetizable iron particles by various coupling methods; both carboxyl terminal and amine terminal iron particles were examined. Introducing a chemical spacer between the iron particles and the antibody improved binding with ANP. The most efficient and reliable...