Prostaglandins (PGs) can be synthesized by the testes (Ellis, 1972) and are present in the male accessory reproductive tissues and in the semen of various mammalian species (Bygdeman, Fredricsson, Svanborg & Samuelsson, 1970; Tan & Privett, 1972). Their physiological rôle in the male reproductive system is not understood but various effects of PG administration on the testes and male reproducti...

This study reports on 20 years of private social welfare spending, from 1972 through 199 1. The private sector is playing an increasingly important role in financing the Nation's aggregate social welfare programs; this section assumes a large share of health and medical care expenditures, as well as income-maintenance benefits, the latter in areas of employment-related pensions, group life insu...

*Correspondence: [email protected] 2School of Mathematics and Computation Science, Hunan City University, Yiyang, 413000, China Full list of author information is available at the end of the article Abstract In this paper, we present sharp bounds for the two Neuman means SHA and SCA derived from the Schwab-Borchardt mean in terms of convex combinations of either the weighted arithmetic and ...