The ethical implications of the growth of for-profit health care institutions are complex. Two major moral criticisms of for-profit medicine are analyzed. The first claim is that for-profit health care institutions fail to fulfill their obligations to do their fair share in providing health care to the poor and so exacerbate the problem of access to health care. The second claim is that profit ...

TetA(B), the tetracycline efflux protein from Tn10, has 12 predicted α-helices that span the Escherichia coli cytoplasmic membrane (10) and is a member of the Major Facilitator Superfamily (4). TetA(B) and related tetracycline antiporters use the bacterial transmembrane proton motive force to export one metal-tetracycline complex in exchange for one H + (12), thereby reducing the intracellular ...

Weak acids such as acetate and benzoate, which partially collapse the transmembrane proton gradient, not only mediate pH taxis but also impair the motility of Escherichia coli and Salmonella at an external pH of 5.5. In this study, we examined in more detail the effect of weak acids on motility at various external pH values. A change of external pH over the range 5.0 to 7.8 hardly affected the ...

The motive associated to the second Symanzik polynomial of double-box two-loop Feynman graph with generic masses and momenta is shown be an elliptic curve.

ATP synthase comprises two rotary motors in one. The F(1) motor can generate a mechanical torque using the hydrolysis energy of ATP. The F(o) motor generates a rotary torque in the opposite direction, but it employs a transmembrane proton motive force. Each motor can be reversed: The F(o) motor can drive the F(1) motor in reverse to synthesize ATP, and the F(1) motor can drive the F(o) motor in...

The uptake of homologous DNA by Haemophilus influenzae was studied as a function of the proton motive force in completely competent cultures in the pH range of 6 to 8. The composition and magnitude of the proton motive force were varied by using the ionophores valinomycin and nigericin (in the presence of various potassium ion concentrations) and by using protonophores. No interaction of the io...

The present paper discusses the association of power and approval motives with adolescent altruistic behaviour. Gender difference was also tried to calculate. The present study comprised of 140 students (70 boys and 70 girls) of age range 13-19 years. Participants were given Selfreport Altruism Scale, Power Motive Scale, and Approval Motive Scale. Results indicate that altruism is positively co...