Three different cultures of BCG propagated for over 2 years in a liquid medium containing Tween 80 and albumin were found to differ in several of their intrinsic properties. Cultures of the three strains were found to consist of morphologically heterogeneous populations-each culture being made up of three main colonial types-spreading, intermediate, and non-spreading. The percentage distributio...

P eople over 65 make up an ever-growing section of the community. It is estimated that these individuals account for 20% of the population in Europe and 14% in the United States of America. It has been predicted that by 2050 those aged over 80 years will represent about 25% of the elderly and 5% of the total population of the USA. In Greece, 11.5% of the general population is aged over 70 years...

In situ groundwater remediation may be achieved using stationary permeable barriers created by the injection of a substrate, such as innocuous vegetable oil, into the contaminated aquifer. The oil provides the electron donor stimulating microorganisms to degrade or sequester many contaminants. At present, little is known about the best procedures to use when injecting oil into an aquifer. In th...

Previous research has demonstrated that the generally positive relationship between age and the presence of charitable giving becomes negative at the oldest ages. We investigate potential causes of this drop in charitable giving among the oldest old including changes in health, cognition, egocentric networks, religious attendance, and substitution of charitable bequest planning. A longitudinal ...