Applied Mechanics and Materials Vols. 411-414

Abstract: Nerve cells can respond to external electromagnetic environment. It features mainly depends on the characteristics of the interference conditions. Hodgkin - Huxley (HH) model gives a quantitative description of neuronal action potentials, many electrophysiological properties of nerve cells and biological rhythms issues of interpretation, the nervous system in order to study the effect of noise, this paper considers the environment in result of the presence of the electric field coupling, and the electric field in the body of the response characteristics of HH model, given values of the simulation results and analysis of the effect of disturbance characteristics of neurons as a disturbance conditions neuronal activity.

Abstract: from one neuron to another neuron fibers generate action potentials of nerve cells, leading to nervous excitement along. Hodgkin - Huxley neuron model has been used to solve many physiological phenomenon. This paper presents Neuralfiber conduction theory, based on the Hodgkin - Huxley model, considering the propagation of nerve impulses nerve fiber soliton solutions, and to further discuss the application of numerical results are two aspects raised.

Abstract: The purpose of this study is to investigate the extraction and separation of alkaloids from H.littoralis. Chopped bulbs of H.littoralis was soaked in a mixture of dichloromethane and methanol (1:1) for 24 h, ultrasonic extraction six times, then extracted with N-butanol to yield crude extracts. Three components were isolated from N-butanol extract of H.littoralis by Sephadex LH-20 and TLC. The compounds were identified by LC-MS, they are 5,6-dihydrobicolorine, Lycorine and 7-deoxy-trans-dihydronarciclasine.