Bothe, Walther

When both solutions are binary and identical in nature and differ only by their concentration and the component E of the held strength is given by Eq. (4.18), the diffusion potential 9 can be expressed by Eq. (4.19). An equation of this type was derived by Walther Nemst in 1888. Like other equations resting on Eick s law (4.1), this equation, is approximate and becomes less exact with increasing concentration. For the more general case of multicomponent solutions, the Henderson equation (1907),... 

The dissolution rate of most oxides increases both with increasing surface protonation and with decreasing surface protonation, equivalent to the binding of OH ligands thus, in the alkaline range the dissolution rate increases with increasing pH (Chou and Wollast, 1984 Schott, 1990 Brady and Walther, 1990) (see Fig. 5.9c). 

Borsche, W. Feise, M. Ber. Dtsch. Chem. Ges. 1904, 20, 378. Walther Borsche was a professor at Chemischen Institut, Universitat Gottingen, Germany when this paper was puhhshed. Borsche was completely devoid of the arrogance shown hy many of his contemporaries. Borsche and his colleague at Frankfurt, Julius von Braun, both suffered under the Nazi regime for their independent minds. 

WaltherBothe and the Physics Institute The Early Years of Nuclear Physics. Nobel Foundation Web site, http //nobelprize.oig/nobel prizes/medicine/ aiticles/states/walther-bothe.html (accessed August 12, 2009). 

Volmer held the prestigious chair of physical chemistry at the University of Berlin. That chair had previously been held by the great Walther Nernst, whose work led to the third law of thermodynamics. In his years in Berlin, Volmer was best known for his early contributions to models for crystal growth, both under chemical and electrochemical conditions. 

Walther then turned to a completely new locked-breech design which appeared in 1937 as the Model AP (Armee Pistole). Barrel and slide rode in the pistol frame, the front of the slide being extensively cut away to expose the rear of the barrel. On firing, both recoiled together for a short distance locked by a wedge beneath the chamber. This wedge was then cammed down to... 

The toxicity of both marine and terrestrial flatworms and its association with aposematic coloration has long been known. Arendt and Walther provide a useful survey of the older literature.129 A few flatworms have been studied with respect to metabolites produced by symbionts. The section about Urochordata discussed flatworms that derive metabolites from food. 

At the end of the 19th century, the theory of electrolytic dissociation became an important part of physical chemistry. Wilhelm Ostwald, Svante Arrhenius, and Walther Nemst were among the most vigorous supporters of that theory, which also had some severe critics. The ensuing debate has been discussed in a paper, which analyses the arguments on both sides and shows how the proponents of the theory attempted to resolve its difficulties.90... 

In May 1925, at last, the X-ray measurements seemed to indicate the presence of both elements 43 and 75. The first mention of the discovery was made at a very high level, at a meeting of the Preujiische Akademie der Wissenschaften, thanks to Walther Nernst who had been Walter Noddack s mentor. [17] The results were published in the prestigious journal Die Naturwissenschaften soon after, in a two-fold contribution. A first section of the paper is devoted to the analytical and geochemical part of the investigation, whereas the second section deals exclusively with the X-ray spectroscopy, [18] and Ida co-authors both contributions. In Walter s and Ida s mind however, the quest was not yet finished. Walter Noddack publicly declared that the crucial point to assess the existence of these two new elements was to produce samples and to hand them over to colleagues. [19]... 

The data of Carroll-Webb and Walther (1988) for corundum (AI2O3) show an order dependence on [H" "] of only 0.15 in the pH range 1 to 8. They reported that dissolution was first-order dependent on adsorbed protons, and attributed the difference in their results from those of Furrer and Stumm (1986) to the difference in pH range used and to possible surface alterations caused by the H2SO4/HF pretreatment used by Furrer and Stumm (1986). Both Furrer and Stumm (1986) and Carroll-Webb and Walther (1988) concluded that the rate-controlling step is the detachment of protonated metal ions from the surface. 

Dividing both sides by -nF, we obtain the Nernst equation, developed by the German chemist Walther Hermann Nernst in 1889 ... 

In 1916 two kinds of chemical bond were described the ionk bond by Walther Kossel (in Germany) and the covalent bond by G. N. Lewis (of the University of California). Both Kossel and Lewis based th eir ideas on the following concept of the atom. 

He d done it by combining with his own talents the advantages to be gained by both insider and outsider. As a student insider he d been exposed to physical chemistry by one of the creators of the field, Walther Nernst, He d gained an acquaintance with the literature in the field, including the observations of catalysis at platinum and other metal surfaces, and the attempts of such chemists as Bodenstein and Fink to explain those observations. 

Meissner, Walther (1882-1974) and his graduate student Robert Ochsenfeld (1901-1993), both Germans working in Berlin, discovered in 1933 that a superconducting material repels a magnetic field— behaving as a perfect diamagnet. The effect became known as the Meissner (or Meissner-Ochsenfeld) effect... 

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