N a previous paper KIMBALL (1949) has described the induction by radiation I of changes in vigor in Paramecium aurelia which first expressed themselves in the exautogamous progeny of rayed animals. In that paper, it was assumed that the changes were due to mutations in the micronucleus. This paper will present the genetic evidence which bears on this assumption. The radiation studies suggested ...

the aim of this qualitative research is to identify the outcomes of vigor. since 2000, in un’s view, such variables as vigor, life expectancy, gratification and satisfaction are computed as key variables in determining nations’ development level which shows the importance of studying vigor. the methodology is an exploratory study in terms of purpose and it is a qualitative survey in terms of da...

Knowledge about the growth vigor of grapevine rootstocks is required for scion-based rootstock selection and breeding. We performed this trial aiming to evaluate multiplication several rootstocks. Thirty-one genotypes were compared on their characteristics, phenological periods, indicators across three consecutive seasons. The results suggested that cuttings most had callus-forming indices (CFI...

Decision making requires an actor to not only steer behavior towards specific goals, but also determine the optimal vigor of performance. Current research and models have largely focused on the former problem of how actions are directed, while overlooking the latter problem of how they are energized. Here, we designed a self-paced decision-making paradigm that showed that rats' performance vigo...

By any number of standards, the :1986-87 academic year was a year of success for Penn: Ourfaculty continued to earn wide national and international acclaim for teaching and research efforts of its members-including eight Guggenheim Fellowships, one MacArthur Fellowship, two Fulbright Scholarships, and three new Penn memberships in the National Academy of Science; " We made an unprecedented leap...