MCCULLOCH, E. C. 1947 The real and apparent bactericidal efficiencies of quaternary ammonium compounds. J. Bacteriol., 53: 370. MCCULLOCH, E. C., HAUGE, S., AND MIGAKI, H. 1948 The role of disinfectants in veterinary medicine. II. A critical evaluation of the quaternary ammonium compounds. J. Am. Vet. Med. Assoc., 112: 283-290. STUART, L. S. 1947 N.A.I.D.M.-U.S.D.A. report on quaternary ammoniu...

We investigate the competitive effects of the merger between Delta Air Lines and Northwest Airlines (2009) in the domestic U.S. airline industry. Applying fixed effects regression models we find that the transaction led to short term price increases of about 11 percent on overlapping routes and about 10 percent on routes which experienced a merger-induced switch of the operating carrier. Over a...

We present ion-by-ion cooling efficiencies for low-density gas. We use Cloudy (version 10.00) to estimate the cooling efficiencies for each ion of the first 30 elements (H–Zn) individually. We present results for gas temperatures between 104 and 108 K, assuming low densities and optically thin conditions. When nonequilibrium ionization plays a significant role the ionization states deviate from...

water and nutrient availability are two major constraints to forage maize production in arid and semi-arid areas; however, the effect of different n levels from organic and inorganic sources on nutrient (i.e., n and p) efficiency under drought stress conditions is not well known for maize faming. thus, a field study was conducted with the objective of determining the effect of n fertilization a...