In this paper, we analyze a dual characterization of life distributions that is based on entropy applied to the past lifetime. Various aspects of this measure of uncertainty are considered, including its connection with the residual entropy. Results on the past entropy is obtained by using the reversed hazard function of X, which is receiving increasing attention in reliability theory and survi...

In a normal menstrual cycle the hypothalamus in the brain signals the release of gonadotropin releasing hormone (GnRH) which, in turn stimulates the anterior pituitary gland to release FSH followed by LH. These hormones target the granulosa and theca cells respectively within the ovary. The dual action of these hormones causes the follicle to mature, and during its maturation oestrogen is incre...

Methods Thirty-six adolescents with SLE were evaluated to determine the characteristics of the disease. SLE disease activity index (SLEDAI) was used to assess SLE status. Beside routine laboratory investigations of SLE, measurement of follicle stimulating hormone(FSH), leutinizing hormone (LH) and estrogen (E2) for females or testosterone for males before and 4 hours after LH releasing hormone ...

we introduce the notions of t-dual rickart and strongly t-dual rickart modules. we provide several characterizations and investigate properties of each of these concepts. it is shown that every free (resp. finitely generated free) $r$-module is t-dual rickart if and only if $overline{z}^2(r)$ is a  direct summand of $r$ and end$(overline{z}^2(r))$ is a semisimple (resp. regular) ring. it is sho...

By using immunohistochemistry and in situ hybridization, we have demonstrated that the nitric oxide (NO)-synthesizing enzyme NO synthase is present in gonadotrophs and in folliculo-stellate cells of the anterior pituitary gland of male and female rats. A marked increase in levels of NO synthase protein and mRNA was observed after gonadectomy. In vitro studies on dispersed anterior pituitary cel...

Nitric oxide (NO) releasing polymers are promising in improving the biocompatibility of medical devices. Polyurethanes are commonly used to prepare/fabricate many devices (e.g., catheters); however, the transport properties of NO within different polyurethanes are less studied, creating a gap in the rational design of new NO releasing devices involving polyurethane materials. Herein, we study t...