During voluntary contraction, firing rates of individual motor units (MUs) increase modestly over a narrow force range beyond which little additional increase in firing rate is seen. Such saturation of MU discharge may be a consequence of extrinsic factors that limit net synaptic excitation acting on motor neurons (MNs) or may be due to intrinsic properties of the MNs. Two sets of experiments i...

The degradation of poly (vinyl pyrrolidone) (PVP) by means of ultrasound irradiation and itscombination with heterogenous photocatalysis (TiO2 nanoparticles) was investigated. Emphasiswas given on the effect of additive on degradation rate constants. 24 kHz of ultrasoundirradiation was provided by a sonicator, while an ultraviolet source of 30 W was used for UVirradiation. To increase the effic...

ophiocoma erinaceus muller &troschel; (ophiocomidae) is part of the extensive group of echinoderm that contains bioactive metabolites. as, the anti cancer potential of brittle star saponin has not been reported against cervical cancer, the present study was conducted to evaluate the anticancer effect of extracted crude saponin. saponin extraction was conducted using conventional method such as ...

The initial myocardial uptake of thallium-201 depends on myocardial blood flow distribution. The phenomenon of delayed thallium redistribution after transiently or chronically altered myocardial perfusion has been described. The net myocardial accumulation of thallium-201 after injection depends upon the net balance between continuing myocardial extraction from low levels of recirculating thall...

this study seek to examine performance of feltham - ohlsen (1995)valuation model at the tehran stock exchange and is trying to identify relation between intrinsic company value and return. this model is trying to determine the intrinsic value of company using their book value. statistical community of this study includes all tse accepted companies and statistical sample is including 37 tse acce...

considerable attention has been given to the identification of key forms of reward and its linkage to employee engagement. for this purpose following study aims to uncover the influence of extrinsic and intrinsic rewards on employee engagement in the public sector of uganda. a sample of 184 public sector employees was randomly selected and taken from gulu district. a quantitative approach based...

Intrinsic and tomographic evaluation tests on the Siemens e.cam Signature Series Single Photon Emission Computed Tomography (SPECT) system were conducted to ensure that it meets the specification required by the user and the capabilities claimed by the manufacturer after installation. The tests were performed according to National Electrical Manufacturers Association protocols and various measu...

This paper explores the computational consequences of simultaneous intrinsic and synaptic plasticity in individual model neurons. It proposes a new intrinsic plasticity mechanism for a continuous activation model neuron based on low order moments of the neuron’s firing rate distribution. The goal of the intrinsic plasticity mechanism is to enforce a sparse distribution of the neuron’s activity ...