Results 211 to 220 of about 2,090,212 (264)

The Dynamics of Changing Seller Concentration

The Journal of Industrial Economics, 1980
SELLER concentration-the market share of the largest n firms-is a normatively important summary statistic taken from the upper tail of the size distribution of an industry's firms.' In this paper we report an attempt to expose the dynamic process by which disturbances affect seller concentration.
Caves, Richard E, Porter, Michael E
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Concentration Changes in an Aerosol

Proceedings of the Physical Society. Section B, 1957
The rate of coagulation of an aerosol was calculated by Smoluchowski on the assumption that every collision resulted in the coalescence of two particles. The coagulation rate when there is a potential barrier round the aerosol particles is now calculated and two examples are considered.
J.F. Richardson, E.R. Wooding
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Changes of Magnesium Concentrations in Endurance Athletes

International Journal of Sports Medicine, 1990
Erythrocitary and serum magnesium (Mg) were determined in a group of 11 well-trained athletes before and after a 25-km running race, and in a group of 30 sedentary controls. The significant increase of mean erythrocitary Mg (EMg) concentration observed in the athletes after physical strain (2.58 +/- 0.34 mEq/l before, 3.10 +/- 0.45 mEq/l after the race:
CASONI I, GUGLIELMINI, Cristina, GRAZIANO L, REALI MG, MAZZOTTA D, ABBASCIANO V.   +5 more
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Perinatal Changes in Hemoglobin Concentration in Rats

1990
During experiments on oxygen availability in fetal rats using pulse oximetry as presented by Wijkstra et al.(1989), we were struck by the low total hemoglobin concentration (cHb) in the fetal blood. Since hemoglobin serves as the main oxygen carrier, the course of cHb during fetal life should be investigated before using the rat as an animal model in ...
Ubels, F.L., Meeuwsen, W.P., Wijkstra, Sonja, Oeseburg, Berend   +3 more
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TIME COURSE FOR THE CHANGE IN HEMOGLOBIN CONCENTRATION WITH CHANGE IN POSTURE

Acta Medica Scandinavica, 1971
Abstract. Hemoglobin concentration has been determined at short intervals in eighteen healthy volunteers when changing from upright to recumbent position. The average maximal decrease, 5% of the initial hemoglobin concentration, was completed in 20 min.
L G, Ekelund, B, Eklund, L, Kaijser
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On the Measurement of Changes in Aggregate Concentration, Market Concentration and Diversification

The Journal of Industrial Economics, 1985
In a recent article Clarke and Davies [I983]-henceforth C & D-developed a framework for the analysis of concentration and diversification based on the Herfindahl index of concentration. They demonstrated how aggregate concentration could be decomposed into the product of two components, one associated with diversification between, and the other with ...
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Changes in plasma concentration of taurine in stroke

Neuroscience Letters, 2011
Taurine is critical for proper brain functioning. Increase in plasma taurine concentration has already been shown in many diseases [1,2,5,10,12,14,17,22,25,47]. The plasma concentrations of taurine in 60 patients, suffering from stroke, were compared with that of 54 healthy volunteers. The plasma samples of the patients were obtained three times in the
Mohammadreza, Ghandforoush-Sattari, Simin O, Mashayekhi, Mahboob, Nemati, Hormoz, Ayromlou   +3 more
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Advertising and Changes in Concentration

Southern Economic Journal, 1969
The effect of advertising on industry structure and firms' behavior is a topic which has stimulated much discussion, a limited number of hypotheses and still fewer empirically verified propositions. One well-known hypothesis, originally put forth by Kaldor, is that advertising will result in increasing industry concentration thereby affecting ...
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Postmortem Changes in Blood Amitriptyline Concentration

The American Journal of Forensic Medicine and Pathology, 1994
Detailed toxicological studies were undertaken on two suicides by amitriptyline overdose, one with salicylate also. In the first case, 10 initial blood samples taken 21 h after body discovery and an estimated 28 1/2 h after overdose had drug concentration (mg/L) ranges of 2.5-12 for amitriptyline (AM), 0.7-3.1 for nortriptyline (NOR), and 81-244 for ...
D J, Pounder, V, Owen, C, Quigley
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