Showing papers on "Langmuir published in 1973"
TL;DR: In this article, the capacity of Co, Zn, Ca, Na, and Na at pH 4 was investigated at 24.0 ± 0.5°C and pH 4.
277 citations
TL;DR: In this article, the evaporation of gallium and arsenic under both Knudsen and Langmuir conditions has been studied using a quadrupole resonance mass spectrometer.
231 citations
209 citations
TL;DR: In this paper, a detailed study of the adsorption and desorption of bovine serum albumin, γ-globulin, and fibrinogen at physiological conditions on a series of polymer membranes, both cation exchangers and neutral, has been carried out.
156 citations
TL;DR: In this paper, it was shown that all synthetic isotherms are exactly analogous to the ones derived in the Langmuir case providing the distribution functions are the same, which may appear surprising considering the fundamental differences between the two adsorption equations.
45 citations
TL;DR: In this paper, the results obtained from a comparative study of the electron currents and positive-ion currents (i+) which flow to a small cylindrical Langmuir probe in pure rare-gas afterglow plasmas at low pressures were presented.
Abstract: This paper describes the results obtained from a comparative study of the electron currents (ie) and positive-ion currents (i+) which flow to a small cylindrical Langmuir probe in pure rare-gas afterglow plasmas at low pressures. It is shown that within a predictable restricted range of charge density, linear plots of ie2 and i+2 against the probe-plasma potential difference could be obtained for positively and negatively biased probes respectively; which is in qualitative agreement with the Langmuir theory of orbital-limited-current collection. However, the values of the electron density (ne) and the apparent positive-ion density (n+) deduced from the slopes of the above plots were not equal; n+ always exceeding ne and related empirically to it via the mass of the positive ion m+ (in amu) thus: n+ = (1+007m+½)ne. It is suggested from additional experimental evidence that the values for ne are accurate and the discrepancy arises as a result of the inadequate theoretical description of the positive-ion currents flowing to the negatively biased probe. The data points of Tonks and Langmuir (1929) and of Shaeffer (1971) obtained in arc plasmas are shown to be consistent with the present results. The significance of these results to plasma diagnostics using probes is discussed.
38 citations
TL;DR: In this article, Oaanne et al. used the linear form of Langmuir's equation and calculated the amount of P adsorbed between equilibrium concentrations of 0.25 to 0.35 ppm (estimates of P buffering capacities).
Abstract: Phosphorus adsor tion isotherms were constructed for six Latosols and one calcareous soil from Hawaii which differed greatly in their phosphorus adsorption capacities. Equilibration was in 0.01M CaCl2 at 25°C for 6 or 8 days. P adsorption properties of the soils were characterised employing the linear form of Langmuir's equation and also by calculating the amount of P adsorbed between equilibrium concentrations of 0.25 to 0.35 ppm (estimates of P buffering capacities), following the procedure of Oaanne and Shaw13. The isotherms of all the soils were found to fit the Langmuir equation at low equilibrium concentrations (< 5 ppm) and the P adsorption maxima ranged from 520 to 10 500 ppm. The buffering capacity estimates correlated closely (r = 0.950) with the adsorption maxima of soils. However, in two soils, the estimates were much lower than expected from their adsorption maxima.
25 citations
TL;DR: The modified Langmuir equation which uses the activity instead of the concentration gives S-shaped adsorption isotherms of electrolyte from aqueous solutions as discussed by the authors, and the modified Szyszkowski equation together with the Gibbs ad-sorption equation yields the modified Sysczkowski equation.
22 citations
TL;DR: Theoretical analysis was made for two successive processes of oxidation using a voltage sweep method as mentioned in this paper, and the following hypotheses were made: adsorption of the reacting species is at quasi-equilibrium (Langmuir isotherms); in each oxidation process there is an electrochemical irreversible step determining the rate of the overall reaction Equations were solved numerically with a computer Typical curves were obtained for various values of rate constants and transfer coefficients of the electrochemical processes
12 citations
TL;DR: In this paper, a theoretical extension of a mathematical model (after Ames) is described, which incorporates both mass transfer-limitations between biomass and liquid film, and kinetic biological reaction rate of organic "food" utilization.
12 citations
TL;DR: The results suggest that some multilayer adsorption or aggregate formation on the surface of solid occurred above a certain concentration.
TL;DR: In this article, the effects of butynediol, coumarin, sodium naphthalenesulphonate, sodium benzenesulphoenate and tolueneulophonamide on the electrical resistivity, mean grain diameter and hardness of nickel deposited from a Watts type solution are reported.
01 Jun 1973
TL;DR: In this article, the Auger cyclindrical mirror analyzer was used to monitor surface films and various gases including oxygen, hydrogen sulfide, methyl mercaptan, and sulfur dioxide were adsorbed to copper, aluminum and chromium surfaces.
Abstract: Various gases were adsorbed to copper, aluminum, and chromium surfaces. The gases included oxygen, hydrogen sulfide, methyl mercaptan, and sulfur dioxide. Chemisorption was conducted on static surfaces and during dynamic friction experiments. An Auger cyclindrical mirror analyzer was used to monitor surface films. The sulfur containing gases adsorbed readily to all surfaces. Exposures of as little as 0.000001 (torr)(sec) (1 langmuir) were sufficient to reduce friction. Sliding contact did not affect chemisorption of copper or aluminum but did affect chemisorption to chromium surfaces. Oxygen removed sulfur films from all surfaces at room temperature (23 C). Gaseous exposures were from 0.000001 to 0.01 (torr)(sec) (1 to 10,000 langmuirs).