Ter Meulen

One of the least expensive and popular techniques for the quant detn of bound N in energetic materials is that of titrimetry. There are currently three basic titrimetry systems used aq acid-base, redox and non-aqueous (involving both acid-base and redox systems in which there is association, not ionization of the re-actants). The simple aq acid-base titrimetry system has been shown, earlier in the article, being used in the Kjeldahl, De varda and Ter-Meulen procedures to detn liberated NH3. It is also utilized, for example, to detn nitrosyi-sulfuric acid in mixed acids, total acidity in nitric acid, NG in exp] oils, and the N content of... 

H. Ter-Meulen J, Heslinger, Neue Me-thoden der Organisch-Chemischen Analyse , Leipzig (1927) 9) E. Griffing C. Alsberg,... 

Oxidation methods for the estimation of S are in process of development and are outside the scope of this book. Ter Meulen (loc. tit.) estimates S in organic compounds by catalytic reduction to H S. 

The first successful application of molecular beam electric resonance to the study of a short-lived free radical was achieved by Meerts and Dymanus [142] in their study of OH. They were also able to report spectra of OD, SH and SD. Their electric resonance instrument was conventional except for a specially designed free radical source, in which OH radicals were produced by mixing H atoms, formed from a microwave discharge in H2, with N02 (or H2S in the case of SH radicals). In table 8.24 we present a complete A-doublet data set for OH, including the sets determined by Meerts and Dymanus, with J = 3/2 to 11/2 for the 2n3/2 state, and 1/2 to 9/2 for the 2ni/2 state. Notice that, for the lowest rotational level (7 = 3/2 in 2n3/2), the accuracy of the data is higher. These transitions were observed by ter Meulen and Dymanus [143], not by electric resonance methods, but by beam maser spectroscopy, with the intention of providing particularly accurate data for astronomical purposes. This is the moment for a small diversion into the world of beam maser spectroscopy. It has been applied to a large number of polyatomic molecules, but apparently OH is the only diatomic molecule to be studied by this method. 

Other groups have built tunable far-inffared spectrometers which do not involve high-frequency backward-wave oscillators. Verhoeve, Zwart, Versluis, Drabbels, ter Meulen, Meerts, Dymanus and McLay [61] have described a system in which fixed frequency far-inffared radiation is mixed with tunable microwave radiation in Schottky barrier diodes. This instrument has been operated up to 2.7 THz, and used to study OD and N2H+. A similar system, combined with a continuous supersonic jet, has been described by Cohen, Busarow, Laughlin, Blake, Havenith, Lee and Saykally [62], This instrument was used to study rare gas/water clusters. 

J = 3/2, 5/2 and 7/2 levels of both fine-structure states. Also shown are the /l-doublet transitions observed, first by Dousmanis, Sanders and Townes [4], and subsequently by ter Meulen and Dymanus [165] andMeertsandDymanus [166]. The later studies [166] used molecular beam electric resonance methods which were described in chapter 8, and the most accurate laboratory measurements of transitions within the lowest rotational level were those of ter Meulen and Dymanus [165] using a beam maser spectrometer, also described in chapter 8. In the years following these field-free experiments, attention... 

Another procedure, the Ter-Meulen hydrogenation method, consists of heating nitrate, nitrite or nitroso contg compds at about 350° in the presence of finely divided Ni, absorbing the anunoiiia formed in standard acid and titrating with standard alkali soln (Refs 4,5,6,. 7,8, 10, 12,13,17 47)... 

Dijkstra RJ, Scheenen W, Dam N, Roubos EW, ter Meulen JJ (2007) Monitoring neurotransmitter release using surface-enhanced Raman spectroscopy. J Neurosci Meth 159 43-50... 

Sopper S, Sauer U, Hemm S, Demudi M, Muller J, Stahl-Hennig C, Hunsmaim G, ter Meulen V, Doiiies R (1998) Proteedve role of the virus-specific immune response for development of severe neurologic signs in simian immunodeficiency virus-infected macaques. J Virol 72 9940-9947. 

Jansen AE, Klaassen R, Feron PHM, Hanemaaijer JA, and ter Meulen BPh. Membrane gas absorption processes in environmental applications. In Crespo JG and Boddekar KW, Eds. Membrane Processes in Separation and Purification. Dordrecht Kluwer Academic, 1994 pp. 343-356. 

Rethwilm A, Erlwein O, Baunach G, Maurer B, ter Meulen V. 1991. The transcriptional transactivator of human foamy virus maps to the bel 1 genomic region. Proc. Natl. Acad Sci. USA 88 941 45... 

Klein-Douwel, R.J.H. Ter Meulen, J.J. Spatial distributions of atomic hydrogen and C2 in an oxyacetylene flame in relation to diamond growth. J. Appl. Phys. 1998, 83, 4734-4745. 

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