The conception of aand P-receptors for catechol amines was originally based on experiments with heart and smooth muscle (Ahlquist, 1948). The present investigation deals with such receptors in glandular tissue. The starting-point was the observation that guanethidine causes a flow of saliva from the submaxillary gland which is completely abolished by dihydroergotamine in cats but only reduced b...

In this paper, an attempt is made to estimate the location and period of the limit cycles of Gause-type predator-prey systems in the case when there is a unique unstable positive equilibrium. An annular region which contains all the limit cycles is determined, and an upper bound for the period of the limit cycles is given. Both the annular region and the upper bound of the period are explicitly...

Innovative production is driven by creative destruction. High turnover requires frequent reallocation of capital. Banks play a major role in capital withdrawing funds from nonviable firms and redirecting credit to scale up the most productive firms. Structural parameters banking system thus affect country’s comparative advantage innovative sectors. Using Heckscher–Ohlin model with banks, this p...

This article recapitulates some of the trade theories reputed to be twentieth century. Here, Heckscher-Ohlin theory (with its variants), endogenous growth theory, product cycle and new were considered. review thereof, amidst others, highlight assumptions these thus present critique same theories.

We present a Gause type predator–prey model incorporating delay due to response of prey population growth to density and gestation. The functional response of predator is assumed to be of Holling type II. In absence of prey, predator has a density dependent death rate. Sufficient criterion for uniform persistence is derived. Conditions are found out for which system undergoes a Hopf–bifurcation...