The adsorption of heavy metals (Pb and Ni) in raw Wyoming bentonite was investigated by means of broadband dielectric spectroscopy (BDS) in the frequency range 10 -2 Hz – 10 6 Hz and at elevated temperatures, up to 1000 o C. In order to reveal various aspects of data interpretation, different formalisms of analysis were investigated, namely, complex electrical conductivity, dielectric modulus a...

BACKGROUND Alzheimer's disease (AD) is closely linked to cardiovascular risk factors. METHODS Echocardiographic studies were performed, including left ventricular diastolic functions, left and right atrial conduction times, and arterial stiffness parameters, namely stiffness index, pressure-strain elastic modulus, and distensibility, on 29 patients with AD and 24 age-matched individuals with ...

Dielectric constant, ε', dielectric loss factor, ε", electric modulus, M, and ac conductivity, σac, of pure CPVC and that stabilized with 10 wt% of phenyl maleimide, PM, have been carried out. The dielectric properties have been studied in the temperature and frequency ranges; 310 K 450 K and 1 kHz4 MHz, respectively. The incorporation of 10 wt% of PM as stabilizer for CPVC leads to reduce its ...

SUMMARY Ventriculo-atrial conduction and the reentry phenomenon was studied during right ventricular and bundle of His pacing in the intact dog heart. Bipolar electrogram recordings were obtained from the sinus node, Bachman's bundle, the right and left atria, the bundle of His, and the ventricle. Retrograde conduction resulted in a specific change in the sequence of atrial activation. The reco...

OBJECTIVE While several studies have demonstrated that the L-type calcium current maintains discontinuous conduction, the contribution of the transient outward current (I(to)) to conduction remains unclear. This study evaluated the effects of I(to) inhibition on conduction between ventricular myocytes. METHODS An electronic circuit with a variable resistance (R(j)) was used to electrically co...

Directly measured sinoatrial conduction time was compared with sinoatrial conduction time assessed simultaneously by the single premature atrial stimulus technique in 59 patients: 20 with normal sinus function, 35 with sinus dysfunction, and four with sinus bradycardia but negative indirect methods. In patients with normal sinus function direct sinoatrial conduction time was 102.5 +/- 34 ms (me...

We examine the temperature dependence of thermal conductivity of one dimensional nonlinear (anharmonic) lattices with and without on-site potential. It is found from computer simulation that the heat conductivity depends on temperature via the strength of nonlinearity. Based on this correlation, we make a conjecture in the effective phonon theory that the meanfree-path of the effective phonon i...

Introduction: Hearing assessment after tympanoplasty is done by taking pure tone average. This study was performed to compare the hearing results obtained from the averages of three and four speech frequencies namely 0.5, 1,2KHz and 0.5,1,2,4 KHz in type III tympanoplasty. Methods: This study was conducted in Tribhuwan university teaching hospital and Kathmandu university hospital, Dhulikhel fr...

Objective(s):Diabetic neuropathy (DN) is a common complication of diabetes that leads to allodynia, impaired nerve conduction, and progressive sensory loss. The aim of this study was to observe the effect of a high-affinity cannabinoid receptors agonist, WIN 55,212-2, on thermal hyperalgesia, nerve conduction velocity and sciatic nerve histopathology in diabetic rats. Materials and Methods: Di...