Kautsky studies

Among the studies of Kautsky et al. on the formation of siloxene by reaction with aqueous hydrochloric acid (see Chapter 10.1.2.) were some on reactions of CaSi2 that conserve the silicon layer. 

When in the early 60s it was demonstrated that this intriguing electronic excited state of molecular oxygen (1A) — since the 30s suggested by Kautsky as key intermediate in the dye-photosensitized oxidation of organic substrates [3] — could be prepared chemically [4-11] and by microwave discharge [12-16], its physical, chemical, and biological aspects were extensively studied in interdisciplinary subdisciplines. 

Jansson and Kautsky (1977) reported that Fucus vesiculosus had disappeared from locations close to the mainland at more seaward locations the stands shrinked since 1974/ 1975. Later studies showed that this trend was continued at least until the mid 1990s (for overview see Kaustky, 1999). This decline was accompanied by a change in the proportion between annual filamentous algae and perennial algae, increasing in time and decreasing with distance from the mainland (Kautsky, 1999). 

Kautsky, H., Kautsky, L., Kautsky, N., Kautsky, U., Lindblad, C., 1992. Studies on the Fucus vesiculosus community in the Baltic Sea. Acta Phytogeographica Suecica, 78, 33 48. 

In our preliminary studies, the siloxene obtained according to Weiss had a surface area of less than 30 m /g, while that prepared by the method of Kautsky... 

Plants subjected to a dark to light transition show fluorescence transients known as the Kautsky effect (1). These transients are composed of two superimposed fluorescence components. First, an initial constant fluorescence (Fq) due to emission by the antennae chlorophyll molecules and not linked to the photochemistry. Second, a variable fluorescence (Fy) which represents fluorescence emission due to a recombination process between the PSII reaction center and its primary electron acceptor Qa (2). The study of photochemistry necessitates the separation of the Fq contribution from the total fluorescence yield F=Fv+Fo where F represents the total fluorescence in time, Fy the variable fluorescence, and Fq the constant fluorescence. Using the least square regression on the linearized form of a power curve, we demonstrated that the Fq fluorescence value estimated was more reproducible than Fq estimated via the linear extrapolation (3). In this report, we investigated the effect of different initial fluorescence rises on the evaluation of the F level. Our method is then discussed, in light of the results, as to the accuracy it yields. 

Kautsky and associates (92, 93) have studied in some detail the lepidoidal silica obtained from a synthetic layerlike colloidal copper silicate which they formulate as [(Si Og)(OH),2][OCuOH]. It has a very high specific surface area similar to the copper mineral chrysocolla (95, 96), which has a specific surface area greater than 300 m g . The corresponding silica has ion-exchange properties, but all the original copper cannot be put back into the structure once it has been removed. 

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