We have investigated the effect of electromechanical activity on the molecular forms of acetylcholinesterase (AChE) in cultured embryonic rat myotubes. Both globular and asymmetric forms of AChE are present on the 5th day of culture when myotubes are just beginning to fibrillate. Between days 5 and 8, the 4 S (G1), 10 S (G4), and 16 S (A12) forms increase dramatically, and appreciable 12.5 S (A...

This paper presents an update of the ranking of economics journals by the invariant method, as introduced by Palacio-Huerta and Volij, with a broader sample of journals. By comparison with the two other most prominent rankings, it also proposes a list of ‘target journals’, ranked according to their quality, as a standard for the field of economics. JEL classification: A12, A14.

Biology and Gender in the Labor Market Can biology help us to better understand gender differences in labor market behavior and outcomes? This chapter reviews the emerging literature which sheds light on this question, considering research in four broad areas: i) behavioral endocrinology; ii) human genetics; iii) neuroeconomics; and iv) sensory functioning and time-space perceptions. JEL Classi...

Beef production systems that increase use of unharvested forages and use animals with greater potential for gain affect age and size of animals placed on a finishing regimen. This experiment was conducted to evaluate effects of genetic potential for gain, age at the start of a finishing period, and time on feed on composition, quantity, and quality of beef produced and efficiency of production ...

Ampicillin at a 50-mug/ml concentration effects a doubling of the autolysis rate of cell envelopes isolated from Klebsiella pneumoniae Mir A12. This antibiotic increases also by two- to threefold the depolymerizing activity of both K. pneumoniae and Escherichia coli crude extracts on a labeled peptidoglycan-lipoprotein complex. Several other penicillins also activate autolysins.