Contrib Plasma Phys

1979

DOI: 10.1002/ctpp.19790190205

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Untersuchungen zu den Existenzbereichen und Typen von ac‐Entladungen zwischen glasisolierten Elektroden. I. Der übergang vom pulse mode zum continuous mode in N_e/N₂‐Penninggemischen

Siegfried Müller²

Abstract: Fructose‐1,6‐bisphosphate aldolase (Fru‐P2A) from a psychrophilic marine bacterium was found to be Class II aldolase based on activation by K+, activation by divalent cations, inactivation by EDTA, low molecular weight, and similar values for Km, Vmax, and ARRHENIUS activation energy. This enzyme was not markedly different in amino acid composition from the enzymes from mesophilic and thermophilic organisms, yet it has unusual thermal properties.

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Cited by 8 publications

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Untersuchungen zu den Existenzbereichen und Typen von ac‐Entladungen. II. Das Verhalten der Entladungstypen in Ne/Ar‐Gemischen und der Vergleich mit Ne/N₂‐Gemischen

1982

Contrib Plasma Phys

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The investigations on the transition between the discharge modes in Ne-N, mixtures are described in [l]. I n the present paper we investigate Ne-Ar mixtures with a view to comparing the behavionr of these different mixtures. The measurements confirm the transition mechanism between the bistable pulse mode and the non-bistable continuous mode in Ne-Penning mixtures. The life time of metastable atoms is important for the existence of the continuous mode. If the life time is changed by varying the cross sections for the Penning ionization QP (e.g. in other mixtures), the transition frequency of both these discharge modes shows a corresponding shift, which, for both mixtures, is in good agreement with literature values of Qp. The second part presents a study of the quasiglow mode. The transition between the pulse mode and the quasiglow mode correlates to the ion transit time. The three discharge modes are represented in the existence diagram.

Untersuchungen zu den Existenzbereichen und Typen von ac‐Entladungen. II. Das Verhalten der Entladungstypen in Ne/Ar‐Gemischen und der Vergleich mit Ne/N₂‐Gemischen

1982

Contrib Plasma Phys

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The investigations on the transition between the discharge modes in Ne-N, mixtures are described in [l]. I n the present paper we investigate Ne-Ar mixtures with a view to comparing the behavionr of these different mixtures. The measurements confirm the transition mechanism between the bistable pulse mode and the non-bistable continuous mode in Ne-Penning mixtures. The life time of metastable atoms is important for the existence of the continuous mode. If the life time is changed by varying the cross sections for the Penning ionization QP (e.g. in other mixtures), the transition frequency of both these discharge modes shows a corresponding shift, which, for both mixtures, is in good agreement with literature values of Qp. The second part presents a study of the quasiglow mode. The transition between the pulse mode and the quasiglow mode correlates to the ion transit time. The three discharge modes are represented in the existence diagram.

Untersuchungen zu den Existenzbereichen und Typen von ac‐Entladungen III. Der Übergang zu reinem Neon und das Bistabilitätsverhalten der einzelnen Typen

Zahn¹,

1982

Contrib Plasma Phys

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The present paper investigates the discharge modes in neon. The Ne-discharge is shown to be sensitively influenced by impurities or small admixtures. If the Ne-filling is not pure enough, pulse mode and continuous mode occur in the same way as in a Ne--N, mixture. But below a nitrogen content of O.0lo/, the shift of the transition frequency between the pulse mode and continuous mode disappears. If the measurements were carried out in pure neon, the non-bistable continuous modc could not be observed, which indicated that the main ionization mechanism, the Penning ionization, had vanished. Instead, in the corresponding parameter range a bistable discharge occurred. This discharge, representing the quasiglow mode, is more intense and the discharge current persists for the whole half cycle.Furthermore, the present paper investigates the wall voltage build up. The charge-transfermethod was extended to the quasiglow mode and the continuous mode. The observed changes in the charge-transfer-curves can be explained by the different discharge mechanisms.

Formation of ac Discharges Between Glass Insulated Electrodes in Ne + 1% N₂ Mixtures. I. Experiments and Analysis

²

1983

Contrib Plasma Phys

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