Wachtel

S. Wachtel, "Prediction of Detonation Ha2ards in SoHd Propellants," in Proceedings of the 145th National Meeting of the Division of Fuel Chemisty, New York, 1963. 

S.S. Wachtel, G. Wachtel and D. Nakamura, in Vertebrate Endocrinology. Fundamentals and Biomedical Implications. Part B. Reproduction, ed. P. K. T. Pang and M. P. Schreibman, Academic Press, London, 1991, p. 149. 

As mentioned in Section 2.2 (Fixed-Bed Reactors) and in the Micro activity test example, even fluid-bed catalysts are tested in fixed-bed reactors when working on a small scale. The reason is that the experimental conditions in laboratory fluidized-bed reactors can not even approach that in production units. Even catalyst particle size must be much smaller to get proper fluidization. The reactors of ARCO (Wachtel, et al, 1972) and that of Kraemer and deLasa (1988) are such attempts. 

Figure 2.3.1 (Wachtel, et al, 1972) shows the ARCO reactor that tried to simulate the real reaction conditions in a fluid cracking unit. This was a formal scale-down where many important similarities had to be sacrificed to get a workable unit. This unit was still too large for a laboratory study or test unit, but instead was pilot-plant equipment that could still give useful empirical results Since this serves a very large industry, it may pay off to try it, even if it costs a lot to operate.

Reprinted with permission from Wachtel etal. Oil and Gas Journal, 1972 Pennwell. Figure 2.3.1 The ARCO reactor. 

S. Ezrahi, E. Wachtel, A. Aserin, N. Garti. Structural polymorphism in a four component nonionic microemulsion. J Coll Interface Sci 797 277-290, 1997. 

Wachtell (Ref 23) worked on the application of this principle. However, early in his work a major problem was encountered in finding the quadrupole resonance of the chlorine nucleus which did not exist in the frequency range in which it had been expected (20—40 megacycles). Nuclear Magnetic Resonance studies finally have shown that this quadrupole resonance should exist around 150 kilocycles. Future studies of single crystals of AP should reveal the presence and the exact location of this resonance. If this can be done, then the analysis of particle size, based on the shift of the quadrupole resonance frequency, may be possible... 

S. Wachtell, Eighteenth Meeting Joint Aimy-Navy-Air Force Panel on Analytical Chemistry of Solid Propellants, Elkton, Maryland, 55—56 (1962) 24) Anon, Boron , MilSpec Ml L-B-. ... 

The DDT mechanism for Case D is identical to that proposed for Case C. However, the model for DDT in Case D will differ from that of Case C because of compaction of the porous bed If from the above discussion the variation of is traced from case to case, it is seen that a minimum in the 8-compaction plane is a natural consequence of the effects of charge permeability and the proposed driving force for DDT The above model for DDT is based on exptl observation with granular and cast HE. However, as already mentioned, DDT in SP and HE should have many similarities. This contention is supported by the observations of Roth (Ref 17) and Wachtel (Ref 29a). Roth s smear camera... 

Wachtel SR, El Sohly MA, Ross SA, et al Comparison of the subjective effects of deltaO-tetrahydrocannabinol and marijuana in humans. Psychopharmacology... 

Wachtel, H. Characteristic behavioural alterations in rats induced by rolipram and other selective adenosine cyclic 3, 5 -monophosphate phosphodiesterase inhibitors. Psychopharmacology. 77 309, 1982. 

Wachtel, Curt. Chemical Warfare. Brooklyn, NY Chemical Publishing Co., Inc., 1941. 

Horowski, R., and Wachtel, H. (1979) Pharmacological effects of lisuride in rodents Mechanism of action and influence of chronic treatments with lisuride. In Dopaminergic Ergot Derivates and Motor Function, edited by K. Fuxe and D. B. Caine, pp. 237-251. Pergamon Press, New York. 

Kolusheva S, Wachtel E, Jelinek R (2003) Biomimetic lipid/polymer colorimetric membranes molecular and cooperative properties. J Lipid Res 44 65-71... 

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