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The South Brazilian grasslands occupy some 13.7 million ha and support very high levels of biodiversity. This paper reviews the current state of ecological knowledge on South Brazilian Campos and of… (More)
The National Forest of Sao Francisco de Paula (FLONA/SFP) is located in the Araucaria forest ecorregion which suffered a very intensive historical destruction. Although the FLONA/SFP is not a… (More)
The general properties of the excitable membrane on molluscan pacemaker neurons can be described on the basis of a fair amount of experimental evidence available in the literature. The neuronal… (More)
Pattern induced flicker colors (PIFCs) were generated by means of a modified version of Benham's top, the stimulus pattern of which could be varied continuously during stimulation by the human… (More)
Abstract Petrographic, chemical and mineralogical data are presented for ferromanganese deposits from the Manus Basin-Bismarck Archipelago region of the southwest Pacific. The samples were dredged… (More)
Der von Volke entwickelte Algorithmus der Zeitvariaten Spektralanalyse  geht von der zeitlichen Variabilität der spektralen Komponenten des EEG aus. Er führt damit zu Spektren in einem… (More)