Bonhoeffer

Process 2, the adsorption of the reactant(s), is often quite rapid for nonporous adsorbents, but not necessarily so it appears to be the rate-limiting step for the water-gas reaction, CO + HjO = CO2 + H2, on Cu(lll) [200]. On the other hand, process 4, the desorption of products, must always be activated at least by Q, the heat of adsorption, and is much more apt to be slow. In fact, because of this expectation, certain seemingly paradoxical situations have arisen. For example, the catalyzed exchange between hydrogen and deuterium on metal surfaces may be quite rapid at temperatures well below room temperature and under circumstances such that the rate of desorption of the product HD appeared to be so slow that the observed reaction should not have been able to occur To be more specific, the originally proposed mechanism, due to Bonhoeffer and Farkas [201], was that of Eq. XVIII-32. That is. 

The current-potential relationship ABCDE, as obtained potentiosta-tically, has allowed a study of the passive phenomena in greater detail and the operational definition of the passive state with greater preciseness. Bonhoeffer, Vetter and many others have made extensive potentiostatic studies of iron which indicate that the metal has a thin film, composed of one or more oxides of iron, on its surface when in the passive state . Similar studies have been made with stainless steel, nickel, chromium and other metals... 

Wei X, Ghosh SK, Taylor ME, Johnson VA, Emini EA, Deutsch P, Lifson JD, BonhoefferS, Nowak MA, Hahn BH et al. (1995) Viral dynamics in human immunodeficiency virus type 1 infection. Nature 373 117-122... 

Nowak MA, Bonhoeffer S, HiU AM, Boehme R, Thomas HC, McDade H (1996) Viral dynamics in hepatitis B virus infection. Proc Natl Acad Sci USA 93 4398 402... 

Regoes RR, Bonhoeffer S. The HIV coreceptor switch a population dynamical perspective. Trends Microbiol 2005 13(6) 269-277. 

Fredenhagen und Bonhoeffer (SI) fiihrten die CANNIZZARO-Reak-tion mit Benzaldehyd in D20 durch und fanden dabei kein Deuterium in der CH2-Gruppe des entstandenen Benzylalkohols. Dies kann durch Wanderung des Wasserstoffs als Hydridion erklart werden. 

In spite of the fact that ortho- or parahydrogen, once separated, last for a long time, they are normally not available commercially therefore, they must be prepared as needed. A time-proven process for the enrichment of parahydrogen follows a procedure first described by Bonhoeffer and Harteck [18]. This is based upon the fact that, at low temperature, the energetically more favorable isomer... 

Bonhoeffer and Farkas estimated k3/k2 100 and claimed that at 15 % decomposition the photolysis is completely self inhibited. More recent work by Ogg and Williams9,10 showed that for the photolysis with 2537 A radiation, k3/k2 is independent of HI pressure (50-150 torr), independent of temperature and has a value 3.5+0.3. The effect of cyclohexane as an inert diluent11 was to increase k3/k2 to 7.0+0.4 at 155°, which value remained constant at high cyclohexane hydrogen iodide ratios. This result was attributed to collisional thermalisation of the hot H atoms produced by 2537 A radiation and this limiting high-pressure value of k3/k2 = (k3/k2)aa was considered to be that for thermally equilibrated H atoms. 

To find the magnitude of the possible error in this figure it is necessary to make an estimate of the partial pressure of atomic hydrogen. Unfortunately, attempts to measure this directly have hitherto been unsuccessful. There are many arguments which may be invoked to decide on a lower limit of the concentration but for the present article we shall restrict ourselves to data obtained from the splendid work of K. F. Bonhoeffer. ... 

In the first place attention is called to the fact that Bonhoeffer s measures of the rate of recombination of atomic hydrogen at 0.5 mm. fit exactly the law... 

Although the problem of the liquid membrane potential was solved in principle by Nemst, a discussion developed in the ensuing two decades between Bauer [6], who developed the adsorption theory of membrane potentials, and Beutner [10,11,12], who based his theories on Nernst s work. This problem was finaly solved by Bonhoeffer, Kahlweit and Strehlow [13], and by Karpfen and Randles [49]. The latter authors also introduced the concept of the distribution potential. 

Blier P, de Montigny C (1998) Possible serotonergic mechanisms underlying the antidepressant and anti-obsessive-compulsive disorder responses. Biol Psychiatry 44 313-323 Bonasera SJ, Tecott LH (2000) Mouse models of serotonin receptor function toward agenetic dissection of serotonin systems. Pharmacol Ther 88 133-142 Bonhoeffer T (1996) Neurotrophins and activity-dependent development of the neocortex. Curr Opin Nemobiol 6 119-126... 

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